Indicator seal for metrology devices

The invention relates to means for locking objects, in particular metrological devices and apparatus, by sealing them.

A monobloc cable seal is known which contains a metal body, in which there is a clogged channel in which one end of the cable is rigidly fixed, an axial channel pierced for the placement of the cable, at the same time the pierced and clogged channels are parallel to each other. , so that the outlet of the clogged channel and the inlet of the pierced channel are located on a side face of the body, in the body is made an oblique hole that communicates with the axial channel pierced and closed from the outside with a blind flange in which is placed the fastening element of the cable, made in the form of a spring ball [1].

The prior art monobloc cable seal does not have a sufficiently high reliability. This is conditioned by the fact that between the fixed end of the cable and its free end in the closed state, a cable fixing eye is formed, and when applying the tensioning effort it is possible both to slide and rotate the cable in relation to the arched ball and to move axial of the rigidly fixed end. This may be the cause of the unauthorized opening of the seal, after which it may be repeatedly closed without detecting the unauthorized opening.

The disadvantages of the above-mentioned seal prevent its use when sealing objects that require high indices of mechanical strength and reliability.

It is also known that the monobloc cable seal contains a body in which a clogged longitudinal channel is made, in which the end of the cable is fixed, and a longitudinal channel pierced for the placement of the cable in it. The pierced and the clogged channel are made parallel to each other, so that the outlet of the clogged channel and the inlet of the pierced channel are located on one side of the body. An oblique hole is also made in the body, which communicates with the pierced channel and in which a locking element with a counter-plug for the interaction with the cable is placed. The body is made entirely of metal, and the end of the cable is additionally fixed PfhjL ·

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Ο <C - Ο Ο Ο 8 3 - Ο 2 -02- 2010 by means of the deformation of the body instead of the location of the clogged canal with the formation of a loop of 180 °. in the body, parallel to the oblique hole, an auxiliary oblique hole is made, which communicates with the auxiliary pierced channel, executed in the body parallel to the longitudinal pierced channel for the placement of the cable, at the same time, the exit hole of the pierced channel and the entrance hole are located on a side face of the body, and between the outlet of the pierced channel and the inlet of the auxiliary pierced channel, a passage hole is made for the location of the cable, protected from lateral protrusions. The body is covered from the outside with a durable plastic coating that protects from access to the elements of the seal in a locked state [2].

The disadvantages of this seal are the low reliability and the impossibility of performing visual inspection, checking the integrity of the cable, if it has been damaged or forced, inside the seal.

The solution is a seal containing a transparent body with a cylindrical cavity, with a bottom and holes on the side surface for the flexible sealing element and a core with holes, coaxial with the holes on the side surface of the body. The core is installed in the body with the possibility of rotation and is equipped with ratchets that are in contact with some longitudinal ribs executed on the inner surface of the body. A removable handle is mounted on the outer front of the core. The body also contains a concave disk with a bottom, covered with a plate for informational data. The cylindrical cavity communicates with the disc cavity through a perforated groove, at the same time the middle part of the core contains an annular channel formed by two circular edges. A protruding bush is placed in the disc cavity which ends with a flexible ratchet which enters the annular channel of the core through the pierced groove [3].

The disadvantages of this seal are its low reliability and complicated construction.

Indicator seal for metrological devices according to the invention removes the above-mentioned disadvantage in that it includes a transparent body made of durable plastic made of a cylindrical cavity, with a bottom and coaxial holes.

V 201 0-00083-- A?

Ο 2 -02- 2010 executed on the side surface, for a flexible sealing element, and a bottom cavity in which a safety device is placed, the bottom cavity communicates with the cylindrical cavity by means of a perforated groove, a core with coaxial holes with those on the side surface of the cylindrical cavity, the core being installed in the cylindrical cavity with the possibility of rotating in one direction and equipped with ratchets which are in contact with longitudinal ribs made on the inner surface of the cylindrical cavity, at the same time the middle part of the core contains an annular channel formed by two circular edges. on the outer front of the core is a handle mounted with the possibility of detachment, the safety device is made prominently, which ends with a flexible ratchet entering the annular channel of the core through the pierced groove; the bottom cavity and the safety device are made in a rectangular shape, at the same time on the sides of the safety device are made some rigid elements, which are in contact with protrusions made on the inner sides of the rectangular bottom cavity and the core part between the circular edges it is made in the shape of a cross.

The safety device is made with the possibility of fixing in two stages the first for transport, and the second for final fixing of the core.

The handle is made in the form of two separate blades, and in the intersection between them are placed informative data.

The sealing element can be made of steel rope, polymer fiber optic cable or twisted steel rope polymer fiber optic cable.

A cavity is placed on the inside of the rectangular cavity for placing informative data.

The result of the invention consists in increasing the degree of protection of the indicator seal for metrological devices by executing the safety device in a rectangular shape and realizing it with the possibility of fixing in two stages, the first for transport and the second for permanent fixing of the core and the core between the circular edges it is made in the shape of a cross, for the rigid fixing of the core, which leads to high reliability. . and:

Ο 1 Ο - Ο Ο Ο 8 3 - Ο 2 -02- 2010

The invention is explained by the drawings in fig. 1 ... 4, which presents:

- fig. 1, sectional view of the indicator seal for assembled metrological devices;

- fig. 2, section AA;

- fig. 3, section BB;

- fig. 4, sectional view of the disassembled indicator seal for metrological devices;

- fig. 5, section CC.

The indicator seal for metrological devices includes a transparent body 1 of resistant plastic mass made of a cylindrical cavity with bottom 2 and coaxial holes 3 made on the side surface, for a flexible sealing element 4 and a cavity with bottom 5 in which a safety device 6, the bottom cavity 5 communicates with the cylindrical cavity 2 by means of a perforated groove 7, a core 8 with holes 9 coaxial with those on the side surface of the cylindrical cavity 2, the core 8 being installed in the cylindrical cavity 2 with the possibility of rotating in one direction and equipped with ratchets 10 which contact with longitudinal ribs 11 made on the inner surface of cylindrical cavity 2. The middle part of the core 8 contains an annular channel formed by two circular edges 12. On the outer front of the core 8 is located a handle 13 mounted with the possibility of detachment through a thin surface 14, the safety device 6 is made with a protrusion 15, which ends with a flexible ratchet 16 entering the annular channel of the core 8 through the pierced groove 7. The bottom cavity 5 and the safety device 6 are made in a rectangular shape. On the sides of the safety device 6 there are rigid elements 17, which are in contact with protrusions 18 made on the inner sides of the rectangular bottom cavity 5. The part of the core 8 between the circular edges is cross-shaped 19.

Λ- 2 Ο 1 Ο - Ο Ο Ο 8 3 - ο 2 -02- 2010

The handle 13 is made in the form of two separate blades, and in the interstice 20 between them are placed informative data.

The flexible sealing element 4 can be made of steel rope, polymer fiber optic cable or twisted steel rope polymer fiber optic cable.

A cavity 21 is placed on the inside of the rectangular cavity 5 for placing the informative data.

How to assemble the indicator seal.

In the cylindrical cavity 2 of the body 1, obtained by the method of pouring transparent plastic, the core 8 is mounted, then in the rectangular cavity 5 is placed (first stage) the safety device 6 so that its rigid elements 17 are in contact with the protrusions 18 executed on the inner parts of the rectangular cavity 5, previously, on the surface of the safety device 6 the informative data can be applied. One end of the flexible element 4 is inserted in the hole 3 of the cylindrical cavity 2, connecting it beforehand with the hole 9 of the core 8, then with the handle 13 one or two rotations are made clockwise, fixing the flexible sealing element 4 on the core 8 Thus, the indicator seal is ready for transport and use. Due to the presence on the core 8 of the ratchets 10 and the longitudinal ribs 11, the handle 13 can be rotated only in one direction and thus the end of the flexible element 4 inserted in the body of the indicator seal cannot possibly be pulled back without destroying the body. in this position the indicator seal is provided to the beneficiaries.

The indicator seal is installed on the object as follows.

The beneficiary passes the free end of the flexible element 4 through the holes or ears of the sealed object and then through the hole 3 of the cylindrical cavity 2 and the hole 9 of the core 8, then rotates the core 8 with the handle 13, winding the flexible element 4 on the core 8 his complete. After the safety device 6 is pressed (second stage), leading to its complete insertion inside the rectangular cavity 5 so that the protrusion 15 passes through the pierced groove 7 and enters the annular channel of the core 8, formed by the edges circular 12, made in the shape of a cross 19, fixing

C - 1 Ο 1 Ο - Ο Ο Ο 8 3 - Ο 2 -02- 2010 safety device 6. Then the handle 13 instead of the thinned surface 14 breaks from the front end of the core 8.

The indicator seal thus installed certainly protects the sealed object from unauthorized release.

Checking the entire flexible element 4 can be performed simply visually or with a laser, directing the light beam at one end of the flexible element 4 with optical fibers, obtaining light at its other end, due to the properties of optical fibers that transmit light from one end. to another.