RU43692U1 - CLAMP CONTACT - Google Patents

Abstract

The utility model relates to electrical products, in particular to contact clamps, and is intended for connecting copper or aluminum conductors when placed in stationary installations and on mobile vehicles, both in explosion-proof and general industrial applications. The technical result that can be achieved using the proposed utility model is to ensure the reliability of the fastening of the conductors and to protect the connection from self-unscrewing, to maximize the use of the cross-sectional area of the hole for introducing the conductor by removing the body of the clamping screw from the area intended to accommodate the clamped conductor. The contact clamp consists of a housing 1 made of an insulating tracking-resistant material designed to accommodate a clamping mechanism, providing the necessary electrical clearances and leak paths, and securing the clamp on a supporting structure (not shown in Fig.) And a clamping mechanism. The clamping mechanism consists of a supporting bracket 2, a contact strip 3, screws 4 with pressure brackets 5 of a C-shape, threaded elements (nuts) 6 and spring elements (washers) 7, which protect the screws 4 from self-unscrewing. The clamped conductor 8 is installed between the contact strip 3 and the C-shaped clamps 5, while the cross-sectional area of the conductor entry hole is maximally used due to the removal of the body of the clamping screw 4 from the area intended to accommodate the clamped conductor 8. IL. 2 1 P. F.

Description

The technical field to which the utility model relates.

The utility model relates to electrical products, in particular to contact clamps, and is intended for connecting copper or aluminum conductors when placed in stationary installations and on mobile vehicles, both in explosion-proof and general industrial applications.

State of the art

Known type-setting clamps for general industrial use, standardized by GOST 19132-86 "Contact type-setting clamps". The disadvantage of these clamps is the impossibility of their use in explosion-proof electrical equipment “protection type“ e ”GOST R 51330.8-99“ Electrical equipment explosion-proof, protection type “e”, Moscow ”and in mine electrical equipment, since leakage paths and electrical clearances do not meet the requirements of GOST R 51330.20-99 “Mine electrical equipment. Insulation, creepage distances and electrical clearances, Moscow ”, as well as the fact that the permissible temperature of contact joints exceeds the values established by GOST 51330.0-99 (IEC 60079-0-98)“ Explosion-proof electrical equipment. General requirements, Moscow. ”

Universal terminals are known for connecting wires with a cross section from 16 to 240 mm in which the wires fixed in the terminal are centered at three points, which is achieved by the prismatic shape of the terminal cage, notches in the terminal cage body guarantee contact, and

the screw is fixed by means of spring-loaded elements (see Phoenix Contact Company Brief Catalog, P.O. Box 1341, D-32819 Blomberg (Blomberg)).

The disadvantage of these terminals for connecting wires is the low reliability of fixing the screw.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is a clasp screw clamp of the elevator type, consisting of a housing inside which a wire clamping mechanism is installed in the terminals (see Brief catalog of Weidmuller. Druck-H. Bösmann GmbH, Detmold / 21-2570, Germany).

The disadvantage of this clamp is the low reliability of the fastening of the conductors.

Utility Model Disclosure

The technical result that can be achieved using the proposed utility model is to ensure the reliability of the fastening of the conductors and to protect the connection from self-unscrewing, to maximize the use of the cross-sectional area of the hole for introducing the conductor by removing the body of the clamping screw from the area intended to accommodate the clamped conductor.

The technical result is achieved by clamping a contact, comprising a housing of insulating tracking-resistant material, inside of which a clamping mechanism, a clampable conductor are installed, the clamping mechanism consists of a supporting bracket, a contact strip, clamping screws equipped with C-shaped clamp brackets and spring washers, threaded nuts in which the clamping screws with spring washers are placed, and the clamped conductor is installed between the contact strip and the pressure brackets, and the cross-sectional area tiya

to install the clamped conductor is arranged to accommodate the clamped conductor.

Brief Description of the Drawings

In FIG. given clamp type-setting checkpoint, general view.

Utility Model Implementation

The contact clamp consists of a housing 1 made of an insulating tracking-resistant material designed to accommodate a clamping mechanism, providing the necessary electrical clearances and leak paths, and securing the clamp to a supporting structure (not shown in Fig.) And a clamping mechanism.

The clamping mechanism consists of a supporting bracket 2, a contact strip 3, screws 4 with pressure brackets 5 of a C-shape, threaded elements (nuts) 6 and spring elements (washers) 7, which protect the screws 4 from self-unscrewing.

The clamped conductor 8 is installed between the contact strip 3 and the C-shaped clamps 5, while the cross-sectional area of the conductor entry hole is maximally used due to the removal of the body of the clamping screw 4 from the area intended to accommodate the clamped conductor 8.

The contact clamp is operated as follows.

For clamping (securing) the conductors 8, the screws 4 are screwed into the threaded elements (nuts) 6, and together with the pressure brackets 5 they are brought closer to the contact strip 3, while the spring elements (washers) 7 are not loaded. With further tightening of the screw 4, the clamping bracket 5 clamps the conductor 8 and when exceeding the tightening force of the conductor 8 over the force necessary to deform the spring elements (washers) 7, the screw 4 stops the translational movement. In this case, threaded elements (nuts)

Sustained translational motion. In this case, the threaded elements (nuts) 6, moving progressively along the threads of the screw 4, deform the spring elements (washers) 7. In the threaded connection (screw-nut), under the influence of spring elements (washers) 7 on the threaded elements (nuts) 6, increases the friction force that prevents the connection from self-unscrewing, while the force of the screws 4, when clamping the conductor 8, is transmitted through the pressure clamp 5 of a C-shape and there is no additional force that destroys the conductor 8 caused by the rotation of the screw 4, and the screws 4 s pressure brackets 5 pr they are protected from self-unscrewing by spring washers 7, since with further tightening of the screws 4, the screws 4 stop the translational movement, and the threaded elements 6, moving progressively along the thread of the screw 4, compress the spring elements 7, while the friction force increases in the threaded connection, which prevents the connection from self-unscrewing, moreover, the cross-sectional area of the hole for the input of the conductor 8 is maximally used due to the removal of the body of the clamping screw 4 from the zone intended to accommodate the clamped wire 8, and the design of the casing 1 of the clamp-in clamp provides the necessary electrical clearances and creepage distances for using the clamp in explosion-proof electrical equipment.

The clamps are designed for operation in surface and underground rooms of coal mines in accordance with the current "Safety Rules in Coal Mines", as well as in hazardous areas according to GOST R 51330.9 and other regulatory documents that determine the applicability of electrical equipment in hazardous areas.

Ex-component clamps are made with ExeIU / ExeIIU explosion protection marking in accordance with GOST R 51330.0.

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

- the reliability of the clamping conductors;

- maximum use of the cross-sectional area of the hole for the input of the clamped conductor;

- connection of conductors without special preparation of their ends (without bending into a ring) with unipolar socket inputs;

- attaching to each terminal of one conductor from the nominal section not less than two sizes less;

- the simultaneous connection to each terminal of two conductors with a total cross-sectional size of not more than the nominal clamp section;

- protection of fasteners from self-unscrewing;

- stable contact pressure even with the flow of materials of conductors.

The design of the clamps eliminates damage, turning, moving and pulling the conductors out of the terminals when tightening the screws.

Contact pressure in the clamp is not transmitted to insulating materials.

Claims (1)

A contact clamp, comprising a housing made of insulating tracking-resistant material, inside of which a clamp mechanism is installed, a clampable conductor, characterized in that the clamp mechanism consists of a supporting bracket, a contact strip, clamping screws equipped with C-shaped clamp brackets and spring washers, threaded nuts, in which clamping screws with spring washers are placed, and the clamped conductor is installed between the contact strip and the pressure brackets, and the area of the transverse hole for installing the clamped The breeder is configured to accommodate a clamped conductor.