Apparatus for introducing an object into a pipe

0001The invention relates to an apparatus for introducing an object into a pipe, comprising a guide that is securely connected to the pipe or is formed by the latter and a positioning device that is displaceably guided on the pipe in an introduction direction by means of the guide and that carries or forms the object, which latter can be introduced into the pipe by displacing the positioning device in the introduction direction.

0002If the object is introduced into the pipe by an operator by displacing the positioning device in the introduction direction if a pressurised fluid, for example compressed air, is charged into the pipeline, then the operator must not release the positioning device since otherwise the positioning device would be forced back against the introduction direction on account of the pressure. The operator must therefore hold the positioning device against the pressure exerted by the fluid until the device has been secured in the desired position on the pipe. This activity is laborious for the operator and complicates the introduction of the object into the pipe.

0003Starting from this background the object of the invention is to facilitate, with an apparatus of the type mentioned in the introductory paragraph, the introduction of the object into the pipe into which is charged a fluid under pressure.

0004This object is achieved according to the invention with an apparatus according to claim <b>1</b>. Preferred developments of the invention are given in the sub-claims.

0005The apparatus according to the invention for introducing an object into a pipe comprises a guide that is securely connected to the pipe or is formed by the latter and a positioning device that is displaceably guided on the pipe in an introduction direction by means of the guide and that carries or forms the object, the object being able to be introduced into the pipe by displacing the positioning device in the introduction direction, wherein the positioning device is connected to the pipe with the interconnection of a linear one-way clutch, which adopts its blocking state when the positioning device is displaced against the introduction direction.

0006Due to the linear one-way clutch a displacement of the positioning device in the direction opposite to the introduction direction is blocked or can be blocked. Accordingly an operator can release the positioning device when introducing the object into the pipe, without the danger that the positioning device being forced back against the introduction direction on account of the pressure. The linear one-way clutch thus forms a non-return security lock for the positioning device. On displacing the positioning device in the introduction direction the one-way clutch on the other hand adopts in particular its one-way state. A displacement of the positioning device in the introduction direction is thus allowed by the one-way clutch.

0007According to a development of the invention the one-way clutch includes an operable release device, by means of which the blocking state can be deactivated. In particular it is possible by actuating the release device to displace the positioning device against the introduction direction. The object can thus be withdrawn from the pipe, for example for the purpose of repair, maintenance or replacement.

0008According to a development of the invention the guide and/or the one-way clutch includes a clamping device, by means of which the positioning device can be fixed on the pipe. Accordingly it is possible to fix the object in a desired position in the pipe without a further insertion of the object in the pipe being possible. The clamping device is preferably releasable, so that the object can be displaced in the introduction direction in the released state of the clamping device. Preferably the clamping device is or will be released in the actuated state of the release device, so that the object can be removed from the pipe. Advantageously the release device and the clamping device are coupled to one another in such a way that the clamping device is released in the activated state of the release device.

0009The one-way clutch can in the blocking state engage in a positive engagement manner with the positioning device. In this case the one-way clutch is designed for example in the form of a ratchet-and-pawl one-way clutch. Preferably however the one-way clutch is designed as a clamping one-way clutch, so that a step-less positioning of the positioning device is possible. In particular the one-way clutch includes a clamping mechanism, which is preferably actuated or can be actuated by displacement of the positioning device.

0010The one-way clutch is in particular securely connected to the guide and/or to the pipe. Furthermore the one-way clutch can be provided separately from the guide. According to an alternative embodiment the guide includes the one-way clutch and/or the one-way clutch and the guide are formed combined with one another, so that in particular a more compact construction of the apparatus according to the invention can be achieved. Furthermore it is possible for the one-way clutch to form the guide.

0011According to a modification of the invention the positioning device includes a receptacle that can be inserted into the pipe in the introduction direction, on which is arranged the end region of the object facing towards the pipe. In particular the receptacle is formed elongated, preferably elongated in the introduction direction. Preferably the receptacle includes a tube or is formed as a tube, so that in particular electrical leads connected to the object can be guided through the interior of the tube. It is thus possible to avoid having to lay such leads on the outer circumference of the receptacle, which could lead to sealing problems. Preferably the positioning device is displaceably guided on or in the guide in the introduction direction by means of the receptacle, the receptacle advantageously being sealed against the guide preferably by means of one or at least one sealing ring.

0012According to a modification of the invention the positioning device includes a locking component that co-operates with the one-way clutch. The locking component serves in particular to hold the positioning device on the one-way clutch in the blocking state of the one-way clutch, so that a movement of the positioning device against the introduction direction is blocked. Preferably the locking component has, at least in the region of the one-way clutch, a constant or substantially constant outer circumference or diameter in the longitudinal direction. Preferably the locking component has, at least in the region of the one-way clutch, a cylindrical or substantially cylindrical outer circumferential surface.

0013According to a first variant of the invention the locking component is formed by the receptacle. In this way a particularly compact construction of the apparatus according to the invention is achieved. According to another variant of the invention the locking component is securely connected to the receptacle. In this case the locking component is provided in particular in addition to the receptacle and preferably forms a separate structural part. For example a conventional apparatus for introducing an object can thus be retrofitted in the manner according to the invention. The locking component is formed for example by one or at least one traction means, for example by one or at least one cables, which is/are preferably securely connected to the receptacle. The formation of the locking component as a cable has the advantage that when the diameter of the pipe is large, it can be flexibly guided over the latter.

0014According to a development of the invention the one-way clutch includes a housing, through which the locking component extends in a longitudinal direction. In particular one or at least one clamping surface inclined or curved in the longitudinal direction is/are provided in the housing, wherein at least one movable clamping element is arranged between the clamping surface and the locking component, which clamping element abuts the locking component and also the clamping surface. In this way it is possible to realise the linear one-way clutch as a clamping one-way clutch. In particular the locking component is displaceable in the longitudinal direction relative to the housing, whereas a displacement of the locking component in a direction opposite to the longitudinal direction is blocked or can be blocked by co-operation of the clamping element with the locking component and the clamping surface. The distance between the clamping surface and the locking component increases in particular in the longitudinal direction. According to a development of the invention the clamping surface is formed by a conical internal circumferential surface of the housing in the longitudinal direction. Preferably the clamping surface tapers in a direction opposite to the longitudinal direction. Advantageously the longitudinal direction extends in the introduction direction and/or coincides with this.

0015Preferably a displaceable sleeve is arranged in the housing, in which the clamping element is mounted and through which the locking component extends in the longitudinal direction.

0016The sleeve is in particular displaceable in the longitudinal direction and/or contrary to the longitudinal direction relative to the housing. Preferably the locking component is furthermore displaceable relative to the sleeve in the longitudinal direction. Advantageously one or at least one through hole extending transversely or inclined to the longitudinal direction is provided in the wall of the sleeve, in which the clamping element is enclosed. Preferably the outer circumferential surface of the sleeve follows at least over certain regions the contour of the clamping surface. With a displacement of the locking component relative to the housing against the longitudinal direction, the locking component on account of friction entrains in particular the sleeve together with the clamping element, until this is clamped between the locking component and the clamping surface and a further displacement of the locking component against the longitudinal direction is thereby frictionally prevented. This state corresponds to the blocking state of the one-way clutch. If the locking component displaces relative to the housing in the longitudinal direction the locking component on account of friction entrains in particular the sleeve and the clamping element, until this can move transversely or inclined to the longitudinal direction and/or until the clamping element is no longer clamped between the locking component and the clamping surface. In this way the locking component is released, so that this can be displaced relative to the housing in the longitudinal direction. This state corresponds to the one-way state of the one-way clutch.

0017According to a development of the invention the sleeve is tensioned by means of a spring, so that the clamping element is forced against the locking component and also against the clamping surface. Preferably the sleeve is tensioned by means of the spring axially and/or in a direction opposite to the longitudinal direction. In this way it can be ensured that the one-way clutch can always be switched by means of the locking component from the one-way state to the blocking state. This applies in particular independently of the position of the positioning device relative to the pipe. The one-way clutch thus provides inherent locking security. If the clamping element does not abut the locking component, there is the danger that the blocking state cannot be reliably achieved.

0018According to a modification of the invention one or a plurality of, preferably three, clamping elements are installed in the sleeve, which respectively abut against the locking component as well as the clamping surface. Thus, apart from a uniform clamping in the blocking state a good guidance of the locking component in the one-way clutch can also be achieved. If each of the clamping elements is furthermore formed as a sphere, a ball-bearing arrangement is produced by the clamping elements, by means of which the locking component is mounted, preferably rotatably, in the one-way clutch.

0019If the locking component is formed by the receptacle, an inner region of the one-way clutch may still be under pressure if the receptacle is to be removed from the one-way clutch. Preferably the one-way clutch therefore includes a pressure release valve, by means of which the inner region can be ventilated. The pressure release valve is in particular secured to the housing of the one-way clutch. Preferably the pressure release valve includes an actuating element, by means of which a gas-permeable connection from the inner region to the surroundings or to a pressure release chamber can be created, so that the inner region can be ventilated. In the non-actuated state of the actuating element the pressure release valve is on the other hand preferably gas-impermeable. According to a modification of the invention the pressure release valve furthermore includes a pressure indicator, by means of which it can be shown whether the inner region is under pressure. The pressure indicator can be formed by the actuating element.

0020The object is or will preferably be positioned in the middle of the pipe. The term “middle” refers in particular to the cross-section of the pipe. Interfering influences on the measurement due to the inner wall of the pipe can thereby be reduced. This is in particular desirable if the pipe has a relatively small internal diameter, for example a nominal width of 40 mm to 100 mm.

0021According to a modification of the invention an adjusting element is movably guided on the receptacle, on which element is provided an end stop, which by displacing the adjusting element relative to the receptacle can be brought to abut against a counter-surface of the receptacle, wherein the adjusting element is connected to the pipe with the interconnection of an additional linear one-way clutch. Preferably the adjusting element is displaceably guided on the receptacle in the introduction direction and can by displacement in the introduction direction relative to the receptacle be brought via its end stop into abutment against the counter-surface. In particular the additional one-way clutch adopts its blocking state on displacement of the adjusting element against the introduction direction. The one-way clutches are preferably formed identically. The additional linear one-way clutch has in particular an operable release device, by means of which the blocking state of the additional one-way clutch can be deactivated. According to this modification of the invention it is then possible to position the object itself in a desired position in the pipe if the internal diameter and/or the wall thickness of the pipe are unknown. To this end, in a first step the receptacle is inserted into the pipe in the introduction direction until the object with its end region facing towards the pipe or the receptacle with its end region facing towards the pipe abut against the inner wall of the pipe. Following this, in a second step the blocking state of the (first) one-way clutch is deactivated and the receptacle is displaced against the introduction direction until the end stop abuts against the counter-surface of the receptacle. A further displacement of the receptacle against the introduction direction is now blocked, since the additional one-way clutch adopts its blocking state. If the distance by which the receptacle is displaced in the first step is measured, and if in addition the external diameter of the pipe is measured, then the internal diameter of the pipe can be determined from the measured values. Since the object abuts with its pipe-side end region against the inner wall of the pipe or the receptacle abuts with its pipe-side end region against the inner wall of the pipe and the position of the object relative to this end region is known, the distance between the object and the desired position can also be determined. Preferably the adjusting element is displaced between the first step and the second step relative to the receptacle by such a distance that the end stop is at the previously determined distance from the counter-surface, so that the object is transferred to the desired position in the second step. The desired position is preferably the middle of the pipe. The adjusting element is formed for example by a traction means, for example by a cable. The formation of the adjusting element as a cable has the advantage that in the case of a pipe of large diameter, it can be flexibly guided past the latter.

0022A pressurised fluid in particular is introduced into the pipe. The pressurised fluid is for example compressed air or another fluid under pressure. The pressure is for example between 6 to 8 bar, but can also be up to 16 bar or more. According to a modification of the invention the fluid flows into the pipe.

0023The object is preferably a material object. For example, the object is an electrical component.

0024According to a modification of the invention the object is or includes one or at least one measurement sensors. In particular the positioning device is or includes one or at least measuring devices. In this case the receptacle can also be termed a sensor receptacle. Preferably one or at least one physical properties of the fluid introduced into the pipe can be measured by means of the object or the measurement sensor. Preferably one or at least one signal characterising this property can be emitted by means of the object or the measurement sensor, preferably an electrical signal. The physical property of the fluid includes for example the pressure and/or the temperature and/or the moisture content and/or the flow velocity and/or the flow direction of the fluid, in particular at the site of the object or measurement sensor. The measurement sensor preferably includes at least one pressure sensor and/or at least one flow sensor and/or at least one temperature sensor and/or at least one moisture sensor and/or at least one flow direction sensor and/or other sensors. The measurement sensor(s) is/are advantageously formed in each case as rod sensors.

0025In addition or alternatively the object is or includes in particular one or at least one sampling device, by means of which one or at least one sample of the fluid introduced into the pipe can be taken. The positioning device is or includes in this case preferably one or at least one sampling device. The sampling device is formed for example by a sealable container.

0026The positioning device, in particular the receptacle, is preferably sealed by means of at least one seal with respect to the guide and/or the one-way clutch. An outflow of the fluid at the interface between the receptacle and the guide and/or the one-way clutch can thus be prevented. The seal preferably forms a sealing ring, which in particular is enclosed in a bed provided on the guide and/or the one-way clutch and abuts in a sealing manner against the outer circumferential surface of the receptacle.

0027The receptacle can have a circular outer circumferential contour. According to a development of the invention the receptacle has an outer circumferential contour differing from a circular shape, which co-operates with an internal circumferential contour of the guide and/or of the one-way clutch differing from a circular shape, as a torsion-proof lock. In particular the internal circumferential contour of the guide and/or of the one-way clutch differing from a circular shape follows in this connection the external circumferential contour of the receptacle differing from a circular shape. Furthermore the sealing ring preferably follows the external circumferential contour of the receptacle differing from a circular shape. The sealing ring consists in particular of a flexible material. Preferably also the bed of the sealing ring is provided with an internal circumferential contour differing from a circular shape, which follows the external circumferential contour of the receptacle differing from a circular shape. Thus, despite the fact that the contours differ from a circular shape a sufficient hermeticity can be achieved by means of the sealing ring. The contours deviating from a circular shape are preferably based respectively on a circular shape that is provided with a flattened portion.

0028According to a development of the invention the guide includes a shut-off valve. It is therefore possible in the dismantled state of the positioning device to prevent an outflow of the fluid through the guide.

0029The guide can be formed by the pipe or can be secured thereto. In particular the guide is flanged onto the pipe.

0030Alternatively the guide can however also be fastened to the pipe by means of a clip.

0031The positioning device preferably extends through the wall of the pipe. For this purpose in particular a hole is provided in the wall of the pipe, through which the positioning device extends. Preferably the positioning device is arranged inside as well as outside the pipe.

0032If the apparatus according to the invention subsequently has to be installed on a pipe already in operation, there is a problem when forming the hole in the wall of the pipe if pressurised fluid is introduced into the latter. According to a first solution approach the pipe is disconnected before the hole is made in the wall of the pipe. This can however result in an economic disadvantage for the operator of the pipe, since this cannot be used for the duration of the installation work. For this reason there is therefore a need to be able to form the hole in the wall of the pipe even if a pressurised fluid is introduced into the pipe.

0033According to a second solution approach the guide containing the shut-off valve is connected, in particular rigidly, to the pipe, for example by means of the clip. A drill is then introduced into the guide, which is sealed particularly with respect to the guide. With the shut-off valve open the hole is now formed by means of the drill in the pipe wall. The drill and/or a drilling machine holding the latter is in this connection secured on the guide and/or the pipe, so that the drill after it has penetrated the pipe wall cannot be completely forced out from the guide by the pressurised fluid. After the drill has penetrated through the pipe wall, it is partly removed from the guide, so that the shut-off valve can be closed. The drill is however still located in the guide and is preferably also still sealed against the latter. The shut-off valve is now closed, following which the drill and/or the drilling machine is released from the guide and/or the pipe and the drill is completely removed from the guide. It is thus possible to form the hole in the wall of the pipe even if pressurised fluid is introduced into the pipe.

0034According to a modification the guide includes a guide tube connected, preferably rigidly connected, to the pipe, in which the shut-off valve is arranged. In particular the guide tube opens out into the pipe. The positioning device and/or the receptacle is/are preferably displaceably guided in the guide tube in the introduction direction. Preferably the positioning device and/or the receptacle extends through the guide tube, in particular in the open state of the shut-off valve. In order to close the shut-off valve the positioning device and/or the receptacle is preferably partly removed from the guide tube, in particular against the introduction direction, until the shut-off valve can be actuated. The shut-off valve can now be converted to its locked state.

0035According to another modification the guide includes a first articulated part that is securely, in particular rigidly, fixed to the pipe and a second articulated part rotatably mounted on the first part, which together with the first articulated part forms the shut-off valve. The shut-off valve can be actuated by swivelling the second articulate part and forms in particular a swivel bearing. The articulated parts include respectively a feed-through hole, wherein the feed-through holes are aligned with one another in an open state of the shut-off valve and are preferably connected to one another in a flow-conducting manner. Each of the feed-through holes advantageously extends through the respective articulated part. In particular the feed-through hole of the first articulated part opens out into the pipe. Starting from the open state the shut-off valve can be switched to the closed state by swivelling the second articulated part, in which the feed-through holes are not aligned with one another and preferably also do not have a flow-conducting connection with one another. By swivelling the second articulated part in the opposite direction the shut-off valve can be switched again from the closed state to the open state. In the closed state of the shut-off valve the feed-through holes are in particular sealed against one another, preferably by means of the articulated parts and/or by means of a seal. Preferably the first articulated part includes a sealing ring, which extends around the feed-through hole of the first articulated part and abuts against the second articulated part. Preferably the sealing ring forms the aforementioned seal. In particular the sealing ring in the open state as well as in the closed state of the shut-off valve hermetically abuts both articulated parts. According to this modification the guide can be formed in a particularly compact manner in the introduction direction. In particular the guide is formed particularly short in the introduction direction, so that also the positioning device and/or the receptacle can be formed particularly short in the introduction direction.

0036The one-way clutch is preferably securely, in particular rigidly, connected to the second articulated part. Preferably the one-way clutch is screwed onto the second articulated part.

0037The positioning device and/or the receptacle is preferably displaceably guided in the feed-through hole of the second articulated part and/or in at least one of the feed-through holes and/or in the feed-through holes in the introduction direction. Preferably the positioning device and/or the receptacle extends through the feed-through holes, in particular in the open state of the shut-off valve. In order to close the shut-off valve the positioning device and/or the receptacle is preferably withdrawn from the feed-through hole of the first articulated part, in particular against the introduction direction, until the second articulated part can swivel.

0038Advantageously the feed-through hole of the second articulated part in the closed state of the shut-off valve is open as far as a bearing surface of the first articulated part, against which abuts the second articulated part. An automatic ventilation of the second articulated part can thus take place, since the bearing surface of the first articulated part in particular does not seal the feed-through hole of the second articulated part against the surroundings. A separate pressure release valve can therefore be dispensed with. If the one-way clutch is connected to the second articulated part, then a ventilation of the one-way clutch can also take place together with the ventilation of the second articulated part.

0039The invention is described in more detail hereinafter with the aid of preferred embodiments and with reference to the accompanying drawings, in which:

0040<figref idref="DRAWINGS">FIG. 1</figref> is a perspective representation of an apparatus according to a first embodiment of the invention,

0041<figref idref="DRAWINGS">FIG. 2</figref> is a perspective representation of a measuring device and a one-way clutch according to the first embodiment,

0042<figref idref="DRAWINGS">FIG. 3</figref> is a longitudinal section through the measuring device and through the one-way clutch according to the first embodiment along the sectional line A-A visible in <figref idref="DRAWINGS">FIG. 2</figref>,

0043<figref idref="DRAWINGS">FIG. 4</figref> is a longitudinal section through the one-way clutch according to the first embodiment,

0044<figref idref="DRAWINGS">FIG. 5</figref> is a cross-section through the one-way clutch according to the first embodiment along the sectional line B-B visible in <figref idref="DRAWINGS">FIG. 3</figref>,

0045<figref idref="DRAWINGS">FIG. 6</figref> is a cross-section through the one-way clutch according to the first embodiment along the sectional line C-C visible in <figref idref="DRAWINGS">FIG. 3</figref>,

0046<figref idref="DRAWINGS">FIG. 7</figref> is a perspective representation of an apparatus according to a second embodiment of the invention,

0047<figref idref="DRAWINGS">FIG. 8</figref> is a perspective representation of an apparatus according to a third embodiment of the invention,

0048<figref idref="DRAWINGS">FIG. 9</figref> is a longitudinal section through the apparatus according to the third embodiment,

0049<figref idref="DRAWINGS">FIG. 10</figref> is a cross-section through the one-way clutch along the sectional line B-B visible in <figref idref="DRAWINGS">FIG. 3</figref> according to a modification of the first embodiment,

0050<figref idref="DRAWINGS">FIG. 11</figref> is a cross-section through the one-way clutch along the sectional line C-C visible in <figref idref="DRAWINGS">FIG. 3</figref> according to a modification of the first embodiment,

0051<figref idref="DRAWINGS">FIG. 12</figref> is a longitudinal section through the measuring device and through the one-way clutch according to a modification of the first embodiment along the sectional line A-A visible in <figref idref="DRAWINGS">FIG. 2</figref>,

0052<figref idref="DRAWINGS">FIG. 13</figref> is a side view of an apparatus according to a fourth embodiment of the invention in an unswivelled state,

0053<figref idref="DRAWINGS">FIG. 14</figref> is a sectional view of the apparatus according to the fourth embodiment along the sectional line D-D visible in <figref idref="DRAWINGS">FIG. 13</figref>, and

0054<figref idref="DRAWINGS">FIG. 15</figref> is a side view of the apparatus according to the fourth embodiment in a swivelled state.

0055<figref idref="DRAWINGS">FIGS. 1 to 6</figref> show different representations and partial representations of an apparatus <b>1</b> according to a first embodiment of the invention, wherein a guide <b>3</b> is flanged onto a pipe <b>2</b>, a positioning device in the form of a measuring device <b>4</b> being displaceably guided in an introduction direction <b>5</b>. The measuring device <b>4</b> includes a tubular receptacle <b>6</b>, which is also termed a sensor receptacle and whose longitudinal mid axis running in the introduction direction <b>5</b> is identified by the reference numeral <b>7</b>. The guide <b>3</b> includes a shut-off valve <b>8</b> and a linear one-way clutch <b>9</b>, which allows a displacement of the sensor receptacle <b>6</b> in the introduction direction <b>5</b> and blocks a displacement of the sensor receptacle <b>6</b> in the opposite direction. At its end remote from the pipe <b>2</b> a housing <b>10</b> with two handles <b>11</b> and <b>12</b> is secured to the sensor receptacle <b>6</b>, which housing includes a measuring electronics unit <b>13</b> that is electrically connected to an object in the form of a measurement sensor <b>14</b> (see <figref idref="DRAWINGS">FIG. 3</figref>), which is fastened to the end region <b>40</b> of the sensor receptacle <b>6</b> facing towards the pipe <b>2</b>. A pressurised fluid, preferably compressed air, is introduced into the interior <b>15</b> of the pipe <b>2</b>, which when the shut-off valve <b>8</b> is open forces the measuring device <b>4</b> against the introduction direction <b>5</b>. If an operator takes hold of the handles <b>11</b> and <b>12</b> and displaces the measuring device <b>4</b> in the introduction direction <b>5</b>, work is therefore performed against the pressure of the fluid. If the operator releases the measuring device <b>4</b>, the one-way clutch <b>9</b> thus prevents the measuring device <b>4</b> from being displaced against the introduction direction <b>5</b> on account of the pressure of the fluid. The flange <b>53</b> serving for the flange connection of the guide <b>3</b> is secured to the pipe <b>2</b>, preferably welded to the latter, so that the first embodiment is suitable in particular for relatively high pressures (e.g. 40 bars).

0056The shut-off valve <b>8</b> serves to enable the measuring device <b>4</b> to be removed from the pipe <b>2</b> and dismantled. In the removed or dismantled state of the measuring device <b>4</b> the shut-off valve <b>8</b> is closed or becomes closed, so that the fluid cannot flow out from the pipe <b>2</b> through the guide <b>3</b>. If on the other hand the measuring device <b>4</b> is installed, the shut-off valve <b>8</b> is open. In addition a measurement socket <b>46</b> is provided at the shut-off valve <b>8</b>, to which can be attached a measuring instrument, by means of which a property of the fluid can be measured. Such a shut-off valve is known for example from U.S. Pat. No. 5,560,392. For example, the pressure or the moisture content of the fluid can be measured by means of the measuring instrument. According to <figref idref="DRAWINGS">FIG. 1</figref> the measurement socket <b>46</b> is hermetically sealed with a blind closure <b>47</b>.

0057<figref idref="DRAWINGS">FIG. 2</figref> shows a perspective representation of the measuring device <b>4</b> and the one-way clutch <b>9</b>, wherein the end region <b>40</b> is visible at the lower end of the sensor receptor <b>6</b>. So that the measurement sensor <b>14</b> can be positioned in a defined position within the pipe <b>2</b>, a length scale <b>33</b> is provided on the sensor receptacle <b>6</b>, by means of which the path by which the sensor receptacle <b>6</b> is displaced relative to the one-way clutch <b>9</b> and/or the pipe <b>2</b> in the introduction direction <b>5</b> can be measured.

0058<figref idref="DRAWINGS">FIG. 3</figref> shows a sectional view through the measuring instrument <b>4</b> and through the one-way clutch <b>9</b> along the longitudinal mid axis <b>7</b>, wherein electrical leads <b>30</b> running in the sensor receptacle <b>6</b> are indicated, by means of which the measurement sensor <b>14</b> is connected to the measuring electronics <b>13</b> unit. A sealing ring <b>31</b> is also shown, which is enclosed in a bed <b>32</b> provided in the one-way clutch <b>9</b> (see <figref idref="DRAWINGS">FIG. 4</figref>) and which seals the sensor receptacle <b>6</b> against the one-way clutch <b>9</b>. In this connection the sealing ring <b>31</b> is pressed by means of a disc <b>48</b> (see <figref idref="DRAWINGS">FIG. 4</figref>) in the introduction direction <b>5</b> against the floor of the bed <b>32</b>. The outer circumference of the sensor receptacle <b>6</b> as well as the inner circumference of a feed-through hole <b>19</b> passing through the one-way clutch <b>9</b> (see <figref idref="DRAWINGS">FIG. 4</figref>), through which the sensor receptacle <b>6</b> extends, are respectively provided with a flat portion <b>43</b>, <b>44</b> (see <figref idref="DRAWINGS">FIG. 5</figref>), so that the sensor receptacle <b>6</b> is prevented by positive engagement on the one-way clutch <b>9</b> from rotating relative to the one-way clutch <b>9</b> about the longitudinal mid axis <b>7</b>. In addition the bed <b>32</b> of the sealing ring <b>31</b> has a flat portion <b>45</b> (see <figref idref="DRAWINGS">FIG. 5</figref>), so that the sealing ring <b>31</b> adapts in a sealing manner to the outer circumference of the sensor receptacle <b>6</b> as well as to the inner circumference of the bed <b>32</b>.

0059According to a modification of the first embodiment the outer circumference of the sensor receptacle <b>6</b> as well as the inner circumference of the feed-through hole <b>19</b> are each of circular shape. In this case the flat portion of the bed <b>32</b> is omitted, so that the latter has a circular shape. Furthermore the feed-through hole through the disc <b>48</b> is circular. The modification of the first embodiment allows a rotation of the sensor receptacle <b>6</b> about the longitudinal mid axis <b>7</b> relative to the one-way clutch <b>9</b>. Apart from these differences the modification of the first embodiment is in particular constructed identically to the first embodiment, so that as regards the further description of the modification of the first embodiment reference is made to the description of the first embodiment. Cross-sections of the modification of the first embodiment are illustrated in <figref idref="DRAWINGS">FIGS. 10 and 11</figref>, wherein <figref idref="DRAWINGS">FIG. 10</figref> shows a cross-section through the one-way clutch <b>9</b> along the section line B-B visible in <figref idref="DRAWINGS">FIG. 3</figref>, and <figref idref="DRAWINGS">FIG. 11</figref> shows a cross-section through the one-way clutch <b>9</b> along the section line C-C visible in <figref idref="DRAWINGS">FIG. 3</figref>.

0060Another sectional view of the one-way clutch <b>9</b> along the longitudinal mid axis <b>7</b> is shown in <figref idref="DRAWINGS">FIG. 4</figref>, in which compared to <figref idref="DRAWINGS">FIG. 3</figref> the one-way clutch <b>9</b> is in particular rotated about the longitudinal mid axis <b>7</b>. The one-way clutch <b>9</b> includes a housing <b>16</b>, which comprises a first housing part <b>17</b> securely connected to the shut-off valve <b>8</b> and a second housing part <b>18</b> that is screwed on to the first housing part <b>17</b>. Alternatively the two housing parts <b>17</b> and <b>18</b> can however also be connected to one another by for example a bayonet closure. The first housing part <b>17</b> preferably consists of stainless steel, since it can come into contact with the fluid. The second housing part <b>18</b> preferably consists of brass. The feed-through hole <b>19</b>, in which the sensor receptacle <b>6</b> is enclosed, extends through the housing <b>16</b> in the direction of the longitudinal mid axis <b>7</b>. The second housing part <b>18</b> includes a conical inner circumferential surface <b>20</b>, which borders an interior space <b>21</b> of the housing <b>16</b> and forms a clamping surface. A sleeve <b>22</b> is displaceably arranged in the interior space <b>21</b> in the introduction direction <b>5</b>, the sensor receptacle <b>6</b> being passed through the sleeve <b>22</b>. A feed-through hole <b>23</b>, which extends transverse to the longitudinal mid axis <b>7</b>, is formed in the wall of the sleeve <b>22</b>. In addition a clamping element <b>24</b> formed as a sphere, which can move transversely to the longitudinal mid axis <b>7</b> relative to the sleeve <b>22</b>, is enclosed in the feed-through hole <b>23</b>. A spring <b>26</b> is arranged between a housing floor <b>25</b> formed by the first housing part <b>17</b> and a front side of the sleeve <b>22</b> facing towards the housing wall <b>25</b>, the spring forcing the sleeve <b>22</b> in a direction opposite to the introduction direction <b>5</b>. The clamping element <b>24</b> thus abuts the sensor receptacle <b>6</b> as well as the clamping surface <b>20</b>. A plurality of, in particular three, feed-through holes extending transversely to the longitudinal mid axis <b>7</b> are preferably provided in the wall of the sleeve <b>22</b>, in each of which a clamping element <b>24</b> is enclosed, which can move transversely to the longitudinal mid axis <b>7</b> relative to the sleeve <b>22</b>. If the clamping elements are each formed as a sphere, then these preferably form a spherical collar, by means of which the sensor receptacle <b>6</b> is supported by a ball bearing arrangement in the one-way clutch <b>9</b>. In the modification of the first embodiment this allows the sensor receptacle <b>6</b> to be easily rotated, so that the measurement sensor <b>14</b> can be aligned in a simple manner.

0061If the sensor receptacle <b>6</b> is displaced in the introduction direction <b>5</b> it entrains the clamping element <b>24</b> as well as the sleeve <b>22</b> as a result of frictional contact, so that the clamping element <b>24</b> is displaced to a larger diameter of the internal circumferential surface <b>20</b>. The clamping element <b>24</b> can thus move transversely to the longitudinal mid axis <b>7</b>, so that the sensor receptacle <b>6</b> can be displaced relative to the one-way clutch <b>9</b> in the introduction direction <b>5</b>. If on the other hand the sensor receptacle <b>6</b> is displaced in a direction opposite to the introduction direction <b>5</b>, then the sensor receptacle <b>6</b> entrains the clamping element <b>24</b> and the sleeve <b>22</b> as a result of frictional contact, so that the clamping element <b>24</b> is displaced to a smaller diameter of the clamping surface <b>20</b>. The clamping element <b>24</b> thus fixes the sensor receptacle <b>6</b> in a frictionally locking manner on the clamping surface <b>20</b>, so that a displacement of the sensor receptacle <b>6</b> in the direction opposite to the introduction direction <b>5</b> is blocked.

0062The sleeve <b>22</b> extends with its end region <b>27</b> remote from the housing floor <b>25</b> outwardly from the housing <b>16</b>, the end region <b>27</b> being provided with a thread <b>28</b> onto which a nut <b>29</b> is screwed. According to <figref idref="DRAWINGS">FIG. 4</figref> the nut <b>29</b> is supported on the housing <b>16</b> and holds the sleeve <b>22</b> in a position in which the sensor receptacle <b>6</b> is secured frictionally on the clamping surface <b>20</b> by means of the clamping element <b>24</b>. In this state the one-way clutch <b>9</b> is inactive. The nut <b>29</b> thus forms a locking device, by means of which the sensor receptacle <b>6</b> can be fixed on the one-way clutch <b>9</b>. If the nut <b>29</b> is loosened, the sleeve <b>22</b> can move in the introduction direction <b>5</b>, so that the one-way clutch <b>9</b> is ready for operation. In addition, in the loosened or partially loosened state of the nut <b>29</b> the sleeve <b>22</b> can by means of the end region <b>27</b> be displaced in the introduction direction <b>5</b>, so that the end region <b>27</b> forms a release device by means of which the blocking state of the one-way clutch <b>9</b> can be deactivated, so that in the deactivated state of the one-way clutch <b>9</b> the sensor receptacle <b>6</b> can be displaced in the opposite direction to the introduction direction <b>5</b>. The displacement of the end region <b>27</b> in the introduction direction <b>5</b> can however also take place by means of the nut <b>29</b> if this is not completely screwed on to the end region <b>27</b>. The spring <b>26</b> ensures that the sleeve <b>22</b> is moved opposite to the introduction direction <b>5</b> and the one-way clutch <b>9</b> is thus automatically restored to its operational state, when the sleeve <b>22</b> is no longer forced via its end region <b>27</b> in the introduction direction <b>5</b>.

0063A cross-section through the one-way clutch <b>9</b> along the sectional line B-B according to <figref idref="DRAWINGS">FIG. 3</figref> can be seen in <figref idref="DRAWINGS">FIG. 5</figref>, which explains the behaviour of the sealing ring <b>31</b>. For the modification of the first embodiment the corresponding cross-section can be seen in <figref idref="DRAWINGS">FIG. 10</figref>.

0064In addition <figref idref="DRAWINGS">FIG. 6</figref> shows a cross-section through the one-way clutch <b>9</b> along the sectional line C-C according to <figref idref="DRAWINGS">FIG. 3</figref>, according to which an annular groove <b>52</b> and a radial groove <b>49</b> open to the latter is provided in the housing <b>16</b>, the disc <b>48</b> enclosed in the annular groove <b>52</b> engaging with the radial groove via a lug <b>50</b> provided on its outer circumference. The disc <b>48</b>, which in particular serves to exert pressure uniformly on the sealing ring <b>31</b> in the introduction direction <b>5</b>, is thus prevented from rotating relative to the housing <b>16</b>. For the modification of the first embodiment the corresponding cross-section can be seen in <figref idref="DRAWINGS">FIG. 11</figref>. The disc <b>48</b> is secured axially on the housing <b>16</b> by means of a locking ring <b>51</b> (see <figref idref="DRAWINGS">FIG. 4</figref>).

0065According to a variant a housing insert <b>68</b> (see <figref idref="DRAWINGS">FIG. 14</figref>) arranged in the first housing part <b>17</b> can be provided, which includes the bed <b>32</b> and the sealing ring <b>31</b>. It is thus possible by changing the housing insert to use the one-way clutch <b>9</b> with sensor receptacles <b>6</b> of different external diameters, without having to change the whole housing part <b>17</b>. The housing insert <b>68</b> is preferably of circular shape and is connected in particular in a torque-resistant manner with respect to the longitudinal mid axis <b>7</b>, to the first housing part <b>17</b>. Advantageously at least one externally accessible fastening means, such as for example a screw <b>69</b> (see <figref idref="DRAWINGS">FIG. 14</figref>), is introduced and/or screwed into the housing <b>16</b> to form this torque-resistant connection, wherein the housing insert <b>68</b> is fixed to the locking means in the first housing part <b>17</b>, and in particular is clamped by pressure exerted by the locking means on the housing insert <b>68</b>. It is therefore possible by releasing the locking means to rotate the housing insert <b>68</b> by means of the sensor receptacle <b>6</b> relative to the housing <b>16</b> about the longitudinal mid axis <b>7</b>, if the sensor receptacle <b>6</b> is provided with the flat portion <b>43</b>. The flat portion <b>44</b> of the feed-through hole <b>19</b> is then preferably provided only in the housing insert <b>68</b> and/or in the part of the feed-through hole <b>19</b> that passes through the housing insert <b>68</b>. Advantageously the housing insert <b>68</b> is axially fixed with a locking ring <b>51</b> in the housing part <b>17</b>. The disc <b>48</b> may be provided or omitted. For example, the disc <b>48</b> forms an integral constituent of the housing insert <b>68</b>. In this case the disc <b>48</b> is preferably rigidly connected to the housing insert and/or is formed in one piece with the latter. In particular however the lug <b>50</b> is omitted, so that a rotation of the housing insert <b>68</b> is not hindered.

0066<figref idref="DRAWINGS">FIG. 7</figref> shows a device according to a second embodiment of the invention, in which similar or identical features to the first embodiment have been identified with the same reference numerals as in the first embodiment. The second embodiment differs from the first embodiment simply in that the guide <b>3</b> is fastened by means of a clip <b>34</b> to the pipe <b>2</b>. The flange <b>53</b> serving for the flange connection of the guide <b>3</b> is fastened, preferably welded, to the clip <b>34</b>, so that the second embodiment is suitable in particular for relatively low pressures (e.g. 16 bars). For the further description of the second embodiment reference is made to the description of the first embodiment.

0067<figref idref="DRAWINGS">FIG. 8</figref> is a perspective view of a device <b>1</b> according to a third embodiment of the invention, in which similar or identical features to the preceding embodiments are identified with the same reference numerals as in the preceding embodiments. In addition <figref idref="DRAWINGS">FIG. 9</figref> shows a section of the device <b>1</b> according to the third embodiment along the longitudinal mid axis <b>7</b> visible in <figref idref="DRAWINGS">FIG. 8</figref>. According to the third embodiment a cable <b>35</b> is secured to the sensor receptacle <b>6</b>, which is passed through a one-way clutch <b>9</b> that is fastened by means of a holder <b>36</b> to the guide <b>3</b> and is arranged next to the latter. In contrast to the preceding embodiments, the one-way clutch <b>9</b> according to the third embodiment thus does not form part of the guide <b>3</b> for the sensor receptacle <b>6</b>. If the measuring device <b>4</b> is displaced in the introduction direction <b>5</b>, then the cable <b>35</b> too also runs through the one-way clutch <b>9</b> in the introduction direction <b>5</b>, so that the one-way clutch <b>9</b> adopts its one-way state. If the sensor receptacle <b>6</b> on the other hand moves in a direction opposite to the introduction direction <b>5</b>, the one-way clutch <b>9</b> adopts its blocking state and blocks the cable <b>35</b>, which thus secures the sensor receptacle <b>6</b> on the holder <b>36</b>. A further displacement of the measuring device <b>4</b> against the introduction direction <b>5</b> is therefore no longer possible.

0068Furthermore an additional one-way clutch <b>37</b> is fastened to the holder <b>36</b>, which is formed similarly to the one-way clutch <b>9</b>. An adjusting element in the form of a cable <b>38</b> is passed through the one-way clutch <b>37</b>, wherein the cable is displaceably guided on the sensor receptacle <b>6</b> in and opposite to the introduction direction <b>5</b> and has at one end an end stop <b>39</b>, which can be brought to bear against a counter-surface <b>41</b> of the sensor receptacle <b>6</b>. The cable <b>38</b>, the counter-surface <b>41</b> and the one-way clutch <b>37</b> form an adjusting device, by means of which the measurement sensor <b>14</b> can be positioned preferably centrally in the pipe <b>2</b>. For this, the sensor receptacle <b>6</b> is inserted into the pipe <b>2</b> until its end region <b>40</b> facing towards the pipe <b>2</b> abuts against the inner wall <b>42</b> of the pipe <b>2</b>. The internal diameter of the pipe <b>2</b> can now be calculated by measuring the external diameter of the pipe <b>2</b> and by taking a reading on the length scale <b>33</b>. The cable <b>38</b> is then displaced in the introduction direction <b>5</b> or in the opposite direction relative to the one-way clutch <b>37</b>, until the distance between the end stop <b>39</b> and the counter-surface <b>41</b> of the sensor receptacle <b>6</b> corresponds to half the calculated internal diameter minus the distance between the measurement sensor <b>14</b> and the front-side end of the end region <b>40</b>. If for this purpose the cable <b>38</b> has to be moved opposite to the introduction direction <b>5</b>, the one-way clutch <b>37</b> is released by means of its release device. The one-way clutch <b>37</b> then has to be restored however to its operating state. Following this the one-way clutch <b>9</b> is released by means of its release device, so that the measuring device <b>4</b> can be displaced against the introduction direction <b>5</b>, until the end stop <b>39</b> abuts against the counter-surface <b>41</b>. The one-way clutch <b>37</b> now blocks a further displacement of the sensor receptacle <b>6</b> against the introduction direction <b>5</b>. The measurement sensor <b>14</b> is thus positioned in the middle of the pipe <b>2</b>, without there being any danger that the measuring device <b>4</b> will be forced out too far from the pipe <b>2</b> on account of the pressure prevailing in the pipe. For the further description of the third embodiment, reference is made to the description of the preceding embodiments.

0069If the receptacle <b>6</b> extends through the one-way clutch <b>9</b>, such as for example in the first embodiment, the interior <b>54</b> of the guide <b>3</b> between the shut-off valve <b>8</b> and the sealing ring <b>31</b> can still be under pressure even if the shut-off valve <b>8</b> is closed. This pressure can act in an interfering manner when removing the sensor receptacle <b>6</b> from the one-way clutch <b>9</b>, so that according to a development of the first embodiment the guide <b>3</b> comprises a pressure release valve <b>55</b>, by means of which the interior <b>54</b> can be ventilated. This can be seen in <figref idref="DRAWINGS">FIG. 12</figref>, which shows a longitudinal section through the measuring device <b>4</b> and through the one-way clutch <b>9</b> according to the modification of the first embodiment along the sectional line A-A visible in <figref idref="DRAWINGS">FIG. 2</figref>. The pressure release valve <b>55</b> comprises an actuating element <b>56</b> in the form of a pin, by means of which the pressure release valve <b>55</b> can be actuated. If the actuating element <b>56</b> is forced in to the pressure release valve <b>55</b>, this frees a gas-permeable connection from the interior <b>54</b> to the surroundings, so that the interior <b>54</b> is ventilated. In the non-actuated state of the actuation element <b>56</b> the pressure release valve <b>55</b> is gas-impermeable. The actuating element <b>56</b> forms furthermore a pressure indicator. If the interior <b>54</b> is under pressure, the actuating element <b>56</b> then projects from the pressure release valve <b>55</b>. If on the other hand the interior <b>54</b> is not under pressure, the actuating element <b>56</b> does not project from the pressure release valve <b>55</b>. The pressure release valve <b>55</b> is fastened to the housing <b>16</b> of the one-way clutch <b>9</b>. Apart from these differences, the development of the first embodiment is in particular constructed identically to the first embodiment, so that for the further description of the development of the first embodiment reference is made to the description of the first embodiment. The pressure release valve <b>55</b> can be provided in all embodiments in which the receptacle <b>6</b> extends through the one-way clutch <b>9</b>.

0070A device according to a fourth embodiment of the invention can be seen in different representations in <figref idref="DRAWINGS">FIGS. 13 to 15</figref>, in which similar or identical features to the preceding embodiments are identified with the same reference numerals as in the preceding embodiments. The fourth embodiment is based on the first or on the second embodiment, except that in contrast to these embodiments the guide <b>3</b> includes a swivel bearing. The guide <b>3</b> also includes a first articulated part <b>57</b> and a second articulated part <b>58</b> rotatably mounted in the latter about a swivel axis <b>64</b>, the second articulated part <b>58</b> together with the first articulated part <b>57</b> constituting the swivel bearing that forms a shut-off valve <b>8</b>. The articulated parts <b>57</b> and <b>58</b> include respectively a feed-through hole <b>59</b> and <b>60</b>, wherein the feed-through holes <b>59</b> and <b>60</b> are aligned with one another in an un-swivelled state of the swivel bearing, corresponding to an open state of the shut-off valve <b>8</b>. The first articulated part <b>57</b> is fastened with its lower end in particular to the flange <b>53</b> visible in <figref idref="DRAWINGS">FIG. 1</figref> or <figref idref="DRAWINGS">FIG. 7</figref>, a description of the flange being omitted here. In addition the feed-through hole <b>59</b> is connected in particular in a flow-conducting manner to the interior <b>15</b> of the pipe <b>2</b>, which also is not illustrated here.

0071The sensor receptacle <b>6</b> is enclosed in the feed-through hole <b>60</b> and is displaceably guided in this in the introduction direction <b>5</b>, so that the sensor receptacle <b>6</b> together with the measurement sensor <b>14</b> can be introduced through the feed-through hole <b>59</b> into the interior <b>15</b> of the pipe <b>2</b>. In addition the sensor receptacle <b>6</b> extends through the one-way clutch <b>9</b>, which is securely connected to the second articulated part <b>58</b>. The feed-through hole <b>19</b> of the one-way clutch <b>9</b> is in this connection aligned with the feed-through hole <b>60</b>. The first articulated part <b>57</b> includes a sealing ring <b>61</b> surrounding the feed-through hole <b>59</b>, which seals the two articulated parts <b>57</b> and <b>58</b> against one another. In the open state of the shut-off valve <b>8</b>, visible in <figref idref="DRAWINGS">FIG. 13</figref> and <figref idref="DRAWINGS">FIG. 14</figref>, the sealing ring <b>61</b> also surrounds the feed-through hole <b>60</b>.

0072The second articulated part <b>58</b> engages via two oppositely facing bearing pins <b>62</b> extending in the direction of the swivel axis <b>64</b>, in bearing recesses <b>63</b> of the first articulated part <b>57</b> and is slidably mounted therein. In addition the first articulated part <b>57</b> slidably abuts with a bearing surface <b>65</b> against a bearing surface <b>66</b> of the second articulated part <b>58</b>. If the second articulated part <b>58</b> is swivelled about the swivel axis <b>64</b> relative to the first articulated part <b>57</b>, the bearing surface <b>66</b> overlaps the feed-through hole <b>59</b>. The bearing surface <b>66</b> is thus in contact with the sealing ring <b>61</b>, which seals the feed-through hole <b>59</b> against the bearing surface <b>66</b>, so that the shut-off valve <b>8</b> adopts its closed state, which can be seen in <figref idref="DRAWINGS">FIG. 15</figref>. For reasons of security the shut-off valve <b>8</b> also includes a locking element <b>67</b>, by means of which the two articulated parts <b>57</b> and <b>58</b> can be locked to one another in the open state as well as in the closed state of the shut-off valve <b>8</b>. For the further description of the fourth embodiment reference is made to the description of the preceding embodiments.

LIST OF REFERENCE NUMERALS

0000<ul id="ul0001" list-style="none"><li id="ul0001-0001" num="0073"><b>1</b> Apparatus</li><li id="ul0001-0002" num="0074"><b>2</b> Pipe</li><li id="ul0001-0003" num="0075"><b>3</b> Guide</li><li id="ul0001-0004" num="0076"><b>4</b> Measuring device/positioning device</li><li id="ul0001-0005" num="0077"><b>5</b> Introduction direction</li><li id="ul0001-0006" num="0078"><b>6</b> Sensor receptacle/receptacle</li><li id="ul0001-0007" num="0079"><b>7</b> Longitudinal mid axis of the sensor receptacle</li><li id="ul0001-0008" num="0080"><b>8</b> Shut-off valve</li><li id="ul0001-0009" num="0081"><b>9</b> Linear one-way clutch</li><li id="ul0001-0010" num="0082"><b>10</b> Housing for measurement electronics unit</li><li id="ul0001-0011" num="0083"><b>11</b> Handle</li><li id="ul0001-0012" num="0084"><b>12</b> Handle</li><li id="ul0001-0013" num="0085"><b>13</b> Measurement electronics</li><li id="ul0001-0014" num="0086"><b>14</b> Measurement sensor/object</li><li id="ul0001-0015" num="0087"><b>15</b> Interior of the pipe</li><li id="ul0001-0016" num="0088"><b>16</b> Housing of the one-way clutch</li><li id="ul0001-0017" num="0089"><b>17</b> First housing part</li><li id="ul0001-0018" num="0090"><b>18</b> Second housing part</li><li id="ul0001-0019" num="0091"><b>19</b> Feed-through hole in the housing</li><li id="ul0001-0020" num="0092"><b>20</b> Clamping surface</li><li id="ul0001-0021" num="0093"><b>21</b> Interior of the housing</li><li id="ul0001-0022" num="0094"><b>22</b> Sleeve in the housing</li><li id="ul0001-0023" num="0095"><b>23</b> Feed-through hole in wall of the sleeve</li><li id="ul0001-0024" num="0096"><b>24</b> Clamping element/sphere</li><li id="ul0001-0025" num="0097"><b>25</b> Housing floor</li><li id="ul0001-0026" num="0098"><b>26</b> Spring</li><li id="ul0001-0027" num="0099"><b>27</b> End region of the sleeve/release device</li><li id="ul0001-0028" num="0100"><b>28</b> Thread</li><li id="ul0001-0029" num="0101"><b>29</b> Nut/locking device</li><li id="ul0001-0030" num="0102"><b>30</b> Electrical lead</li><li id="ul0001-0031" num="0103"><b>31</b> Sealing ring</li><li id="ul0001-0032" num="0104"><b>32</b> Bed for sealing ring</li><li id="ul0001-0033" num="0105"><b>33</b> Length scale on sensor receptacle</li><li id="ul0001-0034" num="0106"><b>34</b> Clip</li><li id="ul0001-0035" num="0107"><b>35</b> Cable</li><li id="ul0001-0036" num="0108"><b>36</b> Holder</li><li id="ul0001-0037" num="0109"><b>37</b> Additional one-way clutch</li><li id="ul0001-0038" num="0110"><b>38</b> Cable/adjusting element</li><li id="ul0001-0039" num="0111"><b>39</b> End stop of the cable</li><li id="ul0001-0040" num="0112"><b>40</b> End region of the sensor receptacle</li><li id="ul0001-0041" num="0113"><b>41</b> Counter-surface of the sensor receptacle</li><li id="ul0001-0042" num="0114"><b>42</b> Inner wall of the pipe</li><li id="ul0001-0043" num="0115"><b>43</b> Flat portion</li><li id="ul0001-0044" num="0116"><b>44</b> Flat portion</li><li id="ul0001-0045" num="0117"><b>45</b> Flat portion</li><li id="ul0001-0046" num="0118"><b>46</b> Measurement socket</li><li id="ul0001-0047" num="0119"><b>47</b> Blind closure</li><li id="ul0001-0048" num="0120"><b>48</b> Disc</li><li id="ul0001-0049" num="0121"><b>49</b> Groove</li><li id="ul0001-0050" num="0122"><b>50</b> Cam of the disc</li><li id="ul0001-0051" num="0123"><b>51</b> Fastening ring</li><li id="ul0001-0052" num="0124"><b>52</b> Annular groove</li><li id="ul0001-0053" num="0125"><b>53</b> Flange</li><li id="ul0001-0054" num="0126"><b>54</b> Interior of the guide</li><li id="ul0001-0055" num="0127"><b>55</b> Pressure release valve</li><li id="ul0001-0056" num="0128"><b>56</b> Actuating element of the pressure release valve</li><li id="ul0001-0057" num="0129"><b>57</b> First articulated part</li><li id="ul0001-0058" num="0130"><b>58</b> Second articulated part</li><li id="ul0001-0059" num="0131"><b>59</b> Feed-through hole in the first articulated part</li><li id="ul0001-0060" num="0132"><b>60</b> Feed-through hole in the second articulated part</li><li id="ul0001-0061" num="0133"><b>61</b> Sealing ring</li><li id="ul0001-0062" num="0134"><b>62</b> Bearing pin</li><li id="ul0001-0063" num="0135"><b>63</b> Bearing recess</li><li id="ul0001-0064" num="0136"><b>64</b> Swivel axis</li><li id="ul0001-0065" num="0137"><b>65</b> Bearing surface of the first articulated part</li><li id="ul0001-0066" num="0138"><b>66</b> Bearing surface of the second articulated part</li><li id="ul0001-0067" num="0139"><b>67</b> Locking element</li><li id="ul0001-0068" num="0140"><b>68</b> Housing insert</li><li id="ul0001-0069" num="0141"><b>69</b> Securing means/screw</li></ul>