Indicator seal for metrology equipment

Describe it:

The invention relates to means for sealing material values, especially metrological devices and devices.

It is known a monobloc cable seal that confines a metallic body, m which is executed a clogged channel, in which is rigidly fixed one end of the cable, an axial channel pierced for the location of the cable, at the same time the channels pierced and established are executed parallel to one another another, so that the outlet port of the clogged channel and the inlet port of the pierced channel are located on the side face of the body, In the body, an oblique orifice is executed that communicates with the axial channel through which it is closed from the outside with a о blind flange, in which the fixing element of the cable, executed in the form of a ball of arc is located [1].

The monobloc seal with known cable does not possess sufficiently high reliability, because between the fixed end of the cable and its free end in closed state, an eye of the cable is formed, and when the tensile stress is applied, both the sliding and twisting of the cable are possible. with arched ball and axial displacement of the rigidly fixed end. This may become the cause of unauthorized opening of the seal, after which the seal may be subjected to repeated closure without the detection of unauthorized opening.

The mentioned disadvantage prevents the use of the seal in case of sealing the material objects that require high indices of mechanical strength and reliability.

Also known is a monobloc cable seal, which confines a body, in which a clogged longitudinal channel is executed, in which the end of the cable is fastened, and a longitudinal channel pierced for laying the cable therein. The pierced channel and the clogged channel are parallel to each other so that the outlet hole of the clogged channel and the inlet hole of the pierced channel are located on the single side face of the body. In the body is also made an oblique orifice, which communicates with the pierced channel and in which is placed a biocharging element with counterfeit for the interaction with the cable. The body is made entirely of metal, and the end of the cable is additionally fixed by means of deforming the body instead of placing the channel blocked with the formation of a 180 ° loop. In the body, parallel to the oblique orifice, an auxiliary oblique orifice is executed, which communicates as the auxiliary pierced channel, executed in parallel with the longitudinal pierced channel for the placement of the cable, at the same time, the exit orifice of the pierced channel and the entrance orifice of the pierced channel auxiliaries are located on the lateral face of the body, and between the outlet hole of the pierced channel and the inlet hole of the auxiliary pierced channel, the passage passage for the cable placement is protected, protected by lateral projections. The body is covered from the outside with a durable plastic board, which protects from access to the sealed elements in a locked state [2].

The disadvantages of this seal are the low reliability and the impossibility to carry out the visual control, to verify the integrity of the cable, as well as the fact that it has been damaged or sheared inside the seal.

The closest solution is a seal, which confines a transparent body with a cylindrical cavity, with 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 contact longitudinal ribs executed on the inner surface of the body. A detachable handle is mounted on the outer front of the core. The body also confines a hollow disk with bottom, covered with a plate for informative data. The cylindrical cavity communicates with the cavity of the disc by means of a perforated groove, at the same time the middle part of the core confines an annular channel formed by two circular edges. In the cavity of the disc is placed a bush with protrusions ending with a flexible ratchet that enters the annular channel of the core through the perforated groove [3].

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

The indicator seal for metrological devices, according to the invention, removes the disadvantages mentioned above in that it confines a transparent body of high strength plastic table with a cylindrical cavity (2) and holes, executed on its lateral surface for a flexible sealing element, and with a cavity (5), in which a safety device is located, the cavity (5) communicating with the cylindrical cavity (2) by means of a through groove. The indicator seal also confines a core with coaxial holes with those on the lateral surface of the body, the core being installed in the cylindrical cavity (2) with the possibility of rotating in one direction and equipped with ratchets with the possibility of contacting longitudinal ribs executed on the inner surface of the body. cylindrical cavities (2). The middle part of the core encloses an annular channel formed by two spaced circular edges, and a detachable handle is fixed on the outer front of the core. The fuse device is made with a protruding end that ends with a flexible ratchet that enters the annular groove of the core through the pierced groove. The cavity (5) and the safety device are executed in a rectangular shape. Rigid elements are made on the fontal edges of the fuse device, which contact with ribs, executed on the inner lateral parts of the rectangular cavity, and the part of the core between the circular edges is executed in the form of a cross.

The safety device can be executed with the possibility of fixing in two stages, the first - for transport, and the second - for definitive fixing of the core.

The handle can be executed in the form of two separate blades with a gap between them for placing informative data.

MD 4034 Bl 2010.04.30

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

On the inside of the rectangular cavity can be made a recess 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 of rectangular shape and with the possibility of fixing in two stages, the first for transport, and the second for the definitive fixing of the core, and the part of the core between the circular edges are executed in the form of a cross for rigid fixation of the core, which increases the reliability.

The invention is explained by the drawings in fig. 1-5, which represents:

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

FIG. 2, section AA;

FIG. 3, section BB;

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

FIG. 5, section CC.

The indicator seal for metrological devices includes a transparent body 1 of high strength plastic mass with о cylindrical cavity 2 and coaxial holes 3, executed on the lateral surface for a flexible sealing element 4, and with о cavity 5, in which a device is located 6, the cavity 5 is communicating with the cylindrical cavity 2 by means of a grooved groove 7, a core 8 with holes 9 coaxial with those on the lateral surface of the body, 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, executed on the inner surface of the cylindrical cavity 2. The middle part of the core 8 confines an annular channel formed by two circular borders 12. On the outer front of the core 8 is fixed a handle 13 mounted with the possibility of detachment through a sub-slot 14, the safety device 6 is executed with the protrusion 15, which ends with a flexible ratchet 16, which enters the annular channel of the core 8 through the groove 7. The cavity 5 and the safety device 6 are executed in a rectangular shape. On the front parts of the safety device 6 are rigid elements 17, which contact with ribs 18, executed on the inner sides of the rectangular cavity 5. The part of the core 8 between the circular edges is executed in the form of a cross 19.

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

The flexible sealing member 4 can be made of an offal rope, fiber optic fiber cable or twisted offal rope.

On the inside of the rectangular cavity 5 is made a groove 21 for placing the informative data.

Module for assembling the indicator seal.

In the cylindrical cavity 2 of the body 1, obtained by the method of pouring of transparent plastic material, the core 8 is mounted, then in the rectangular cavity 5 the safety device 6 is placed (first step) so that its rigid elements 17 contact the ribs 18, executed on the inner sides of the rectangular cavity 5. Previously, informative data can be applied on the surface of the safety device 6. One end of the flexible member 4 is inserted into the hole 3 of the cylindrical cavity 2 and into the hole 9 of the core 8, and then with the handle 13, one - two rotations are made after the 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 only be rotated in one direction and thus the end of the flexible element 4 inserted in the body of the indicator seal cannot 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 in the following way.

The beneficiary passes the liberal end of the flexible element 4 through the holes or the ears of the sealed object and then through the hole 3 of the cylindrical cavity 2 and the hole 9 of the core 8, after which it rotates the core 8 with the handle 13, winding the flexible element 4 on the core 8 until its extension. fill. After this the safety device 6 is pressed (second step), which leads to its complete insertion inside the rectangular cavity 5 so that the projection 15 passes through the through groove 7 and enters the annular channel of the core 8, formed by the circular edges 12, fixing the safety device 6. Then the handle 13 instead of the thinness 14 is greased from the front end of the core 8.

The indicator seal installed in this way certainly protects the sealed object from unauthorized business.

Checking the integrity of the flexible element 4 can be performed simply visually or with the help of a laser, directing the light beam at one end of the flexible element 4 with optical fibers and obtaining light at the other end of it, due to the properties of the optical fibers, which transmit light from a end to end.