RU45207U1 - CABLE INPUTS (OPTIONS) - Google Patents

Abstract

The utility model relates to electrical products, in particular to cable glands and can be used to seal and fix flexible and armored cables with rubber and plastic insulation of circular cross section when entering them into stationary, mobile or portable electrical equipment and intended for use in explosion-proof electrical equipment.

The technical result that can be obtained using the proposed utility model is reduced to reliable sealing and fixing of flexible and armored cables and providing a high degree of protection against mechanical damage, as well as the fact that the bushings withstand the pressure of the explosion and exclude its transfer to the environment, which allows them to be used in explosion-proof electrical equipment, when creating a series of cable glands (VK).

Cable entries consist of a housing 1, intended for fixing the input to the electrical equipment sheath (not shown in FIG.), Inside of which there is an element for cable sealing (not shown in FIG.) Consisting of a sealing ring 2, a thrust washer 3 and a plug 4, with in this case, a push-in sleeve 5 or push-in fitting 6 is attached to the housing 1 for the necessary force when clamping the cable, and a cable fastening element is installed on or into the push-in sleeve 5 or push-in fitting 6, which protects the cable from external mechanical influences and consists of 7 of the clamp or collet or collet 8 9, wherein the bushings are mounted on screws or bolts electrical sheath 10 or the nut 11, and to ensure tightness in place of compound 1 bushings housing and shell establish electrical resilient gasket 12.

Cable entries are Ex-components and have ExeIIU or ExdIU / ExdIICU or ExdIICU explosion-proof markings and are intended for use in explosion-proof electrical equipment of groups I and II.

The climatic modification of the inputs B, T of the placement category 1, 5 is according to GOST 15150, while the lower and upper values of the ambient temperature are from minus 60 ° С to plus 50 ° С.

IL 7

6 P. F.

Description

The utility model relates to electrical products, in particular to cable glands and can be used to seal and fix flexible and armored cables with rubber and plastic insulation of circular cross section when entering them into stationary, mobile or portable electrical equipment and intended for use in explosion-proof electrical equipment.

State of the art

Cable glands made of plastic, brass with cable protection from bending are known, equipped with a clamping clamp for additional cable fastening, degree of protection JP54 (see Cable gland. Weidmüller.http: //www.weidmueller.ru short catalog).

The disadvantage of these cable entries is their low reliability.

Known flexible inflatable sealing element (options) in the form of a shell for sealing the gap between two objects, containing a hole in its wall or between its walls for installing a tip connected to a pressure source of the working medium, is equipped with an internal valve for automatic tight closing of the hole under the influence of internal pressure after removing the tip from the hole according to one of the options. According to another embodiment, the flexible inflatable sealing element has said opening and an internal valve,

but into the element of the working medium under pressure is introduced directly through the hole. According to the third embodiment, the element has a plane unidirectional valve for introducing a pressure-generating medium through a nozzle connected to it, after removal of which the unidirectional valve is automatically sealed from the hole. This valve is located on the wall of the sealing element and is parallel to it (see US Pat. RF №2129747, CL N 02 G 15/013, F 16 J 15/46, publ. 04/27/1999).

The disadvantage of this sealing element is not sufficiently reliable sealing and fixing the gaps between the objects.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype are cable glands, consisting of a housing designed to fix the input on the shell of electrical equipment with screws or bolts and nuts, an element for sealing the cable (see Explosion-proof electrical equipment. Part 0. General requirements Appendix B. EX-cable entries. C.37-42. GOST R 51330.0-99).

The disadvantage of these cable entries is a low degree of protection against mechanical damage and reliability.

Utility Model Disclosure

The technical result that can be obtained using the proposed utility model is reduced to reliable sealing and fixing of flexible and armored cables and providing a high degree of protection against mechanical damage, as well as the fact that the bushings withstand the pressure of the explosion and exclude its transfer to the environment, which allows them to be used in explosion-proof electrical equipment, when creating a series of cable glands (VK).

The technical result is achieved using cable entries containing a housing with fixed entries on the shell

electrical equipment with screws or bolts (or nuts), an element for sealing the cable, while the bushings are additionally equipped with a pressure sleeve with a cable fastening element mounted in it in the form of a pressure bracket, while the pressure sleeve with a cable fastening element is fixed to the housing and an elastic gasket, located at the junction of the inlet housing and the sheath, and the cable sealing element is made in the form of a sealing ring, plug, thrust washer.

Or the bushings are additionally equipped with a push-in sleeve with a cable fastening element installed in it in the form of clamping sleeves, while a push-in sleeve with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form O-rings, plugs, thrust washers.

Or the bushings are additionally equipped with a push-in sleeve with a cable fastening element installed in it in the form of a clamping collet, while the push-in sleeve with a cable fastening element is mounted on the housing and with an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form O-rings, plugs, thrust washers.

Or the bushings are additionally equipped with a push-in fitting with a cable fastening element mounted on it in the form of a clamping bracket, while the push fitting with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form O-rings, plugs, thrust washers.

Or the bushings are additionally equipped with a pressure fitting with a cable fastening element mounted on it in the form of a clamping sleeve, while a pressure fitting with a cable fastening element is fixed to the housing and an elastic gasket located in place

connections of the input bushings and the sheath, and the cable sealing element is made in the form of a sealing ring, plug, thrust washer.

Or the bushings are additionally equipped with a push-in fitting with a cable fastening element installed in it in the form of a clamping collet, while the push-in fitting with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form O-rings, plugs, thrust washers.

Brief Description of the Drawings

Figure 1 shows the inputs of the cable VK (Ex-cable entries), General view;

Figure 2 shows the inputs of cable VK12;

Figure 3 shows the cable entries VK16 - ExeIIU;

Figure 4 shows the cable entries VK25, VK30;

Figure 5 shows the cable entries VK42 - ExdIU / ExdIICU;

Figure 6 shows the cable entries VK53 - ExdIICU;

In Fig. 7, cable entries BK66 - ExdIU / ExdIICU are given.

Utility Model Implementation

Cable entries consist of a housing 1, intended for fixing the input to the electrical equipment sheath (not shown in FIG.), Inside of which there is an element for cable sealing (not shown in FIG.) Consisting of a sealing ring 2, a thrust washer 3 and a plug 4, with in this case, a push-in sleeve 5 or push-in fitting 6 is attached to the housing 1 for the necessary force when clamping the cable, and a cable fastening element is installed on or into the push-in sleeve 5 or push-in fitting 6, which protects the cable from external mechanical influences and consists of 7 of the clamp or collet or collet 8 9 with

this inputs are mounted on the electrical sheath with screws or bolts 10 or nut 11, and to ensure tightness at the junction of the housing 1 of the inputs and the electrical sheath, install an elastic gasket 12.

Cable entries are Ex-components and have ExeIIU or ExdIU / ExdIICU or ExdIICU explosion-proof markings and are intended for use in explosion-proof electrical equipment of groups I and II.

The climatic modification of the inputs B, T of the placement category 1, 5 is according to GOST 15150, while the lower and upper values of the ambient temperature are from minus 60 ° С to plus 50 ° С.

The operation of cable entries is as follows.

To install the input on the shell, it is necessary to make holes in the wall of the shell in accordance with the installation dimensions and install the input housing 1, then:

- to make the cable cores and prepare the cores for installation;

- unscrew the screws 10 of the clamping bracket 7 and put the clamping sleeve 5 on the cable;

- to put on a cable a clamping collet 9 (for inputs VK12 and VK16) or clamping sleeves 8 (for VK53);

- put on the washer 3 (for inputs VK12, VK16, VK53);

- put on the o-ring 2, having previously removed the inner part of the ring 2 according to the existing notches (if necessary) and install the plug 4;

- insert the cable into the sheath and perform the necessary installation;

- install all the input details in the housing 1 together with the cable and install the pressure fitting 6 or pressure sleeve 5;

- the inputs are attached to the electrical equipment shell with screws or bolts 10 or nut 11, and to ensure tightness at the junction of the input housing 1 and the electrical equipment shell, an elastic gasket 12 is installed.

When performing the above works, reliable sealing and fixing of flexible and armored cables with rubber and plastic insulation of round and flat cross-section is ensured when they are inserted into stationary, mobile or portable electrical equipment.

The proposed utility model in comparison with the prototype and other well-known technical solutions has the following advantages:

- provides reliable sealing and fixing of flexible and armored cables with rubber and plastic insulation of circular cross section and flat when entering them into stationary, mobile or portable electrical equipment and meeting the requirements of domestic standards;

- the design of the inputs provides a degree of protection of the IP65 enclosure;

- provides a high degree of protection against mechanical damage and the bushings withstand the pressure of the explosion and exclude its transfer to the environment, which allows them to be used in explosion-proof electrical equipment.

Claims (6)

1. Cable entries, comprising a housing with fixed entries on the sheath of electrical equipment using screws or bolts (or nuts), an element for sealing the cable, characterized in that the entries are additionally equipped with a push-in sleeve with an attached cable fastening element in the form of a clamp this push clutch with an element for securing the cable is fixed to the housing and an elastic gasket located at the junction of the input bushings and the sheath, and the cable sealing element is made in the form of a sealing ring, aglushki, pressure washers. 2. Cable entries, comprising a housing with fixed entries on the electrical sheath using screws or bolts (or nuts), an element for cable sealing, characterized in that the entries are additionally equipped with a push-in sleeve with an element for securing the cable in the form of clamping sleeves, when this push clutch with an element for securing the cable is fixed to the housing and an elastic gasket located at the junction of the input bushings and the sheath, and the cable sealing element is made in the form of a sealing ring, aglushki, pressure washers. 3. Cable entries, comprising a housing with fixed entries on the sheath of electrical equipment using screws or bolts (or nuts), an element for sealing the cable, characterized in that the entries are additionally equipped with a push-in sleeve with an element for securing the cable in the form of a clamp collet, this pressure sleeve with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the input housing and the sheath, and the cable sealing element is made in the form of a sealing ring, Glushkov, pressure washers. 4. Cable entries, comprising a housing with fixed entries on the electrical sheath using screws or bolts (or nuts), an element for sealing the cable, characterized in that the entries are additionally equipped with a push fitting with an element for securing the cable in the form of a clamp bracket this push-in fitting with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form of a sealing ring , Plug, pressure washers. 5. Cable entries, comprising a housing with fixed entries on the electrical sheath using screws or bolts (or nuts), an element for sealing the cable, characterized in that the entries are additionally equipped with a push fitting with an element for securing the cable in the form of a clamping sleeve, this push-in fitting with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form of a sealing ring , Plug, pressure washers. 6. Cable entries, comprising a housing with fixed entries on the electrical sheath using screws or bolts (or nuts), an element for sealing the cable, characterized in that the entries are additionally equipped with a push fitting with an element for securing the cable in the form of a clamp collet, this push fitting with a cable fastening element is fixed to the housing and an elastic gasket located at the junction of the bushings and the sheath, and the cable sealing element is made in the form of a sealing ring, plugs, pressure washers.