SU1350728A1 - Sleeve for joining protective metal tubes of electric wiring - Google Patents

Abstract

This invention relates to the field of electrical engineering, in particular to electrical installation production. The purpose of the invention is to simplify the design while increasing the reliability of the connection. The housing of the coupling is made in the form of a U-shaped stamped bracket 1 with a flat base and counter-inclined sidewalls 3 having shaped holes. When tightening the threaded fastener 5, the sharp edges of the ellipsoidal holes interact with the surface of the pipes to be connected, thus creating a reliable electrical contact and ensuring the shrinking of the pipes. 1 hp f-ly, 5 ill. i (L Connected Tubes // created about to 00

Description

1350728

The invention relates to electrical engineering, in particular, to devices for connecting pipes in pipe wiring.

The purpose of the invention is to simplify the design while improving reliability.

1 shows a clutch, a general front view from the side of the joint; Fig 2 is the same cross section at the junction of the pipes; on fig.Z - the same, top view; 4 is the same in the case of two half couplings,

longitudinal section; figure 5 - the same, 15c it, and contribute to the establishment

view from above; 6 shows the half coupling of an additional reliable electrically interconnecting one to another, which is a common contact of the grounding network (in view of the connection) of the connecting pipes, reinforcing

The clutch includes a housing, made the effect of self-ignition.

When tightening the threaded fastener, the inclined surfaces of the coupling directed to the plane of tightening ensure reliable mechanical strength and fixation of the jointed

in the form of manufactured by stamping П-об-20 of different bracket 1 with a flat base 2 and counter-inclined sidewalls

3, each of which has a sharply shaped figure hole

4, the shape of which corresponds to pro-25 pipes.

Any inclined pipe section. Ends Thermal expansions occurring sidewalls 3 st chuis fastener under the influence of constantly changing the-element of the 5. ambient temperature and

In the preferred embodiment of the linear dimensions, the base of the bracket 1 is directed to the SO, the effect of tightening (self-inward bending of 6 lateral tightening) of the pipes, ensuring

mock for centering tubes. Bendings 7 can be made in the body, and the body is made

the most constant transient resistance earthing parameters. As a result of this, a composite of two articulated joints is given the opportunity to use pipes, half of the pipes. Subjected to oxidation or having

Installation using this coupling is carried out as follows.

The pipes are inserted into the figured holes 4 of the sidewalls 3 of the body, orienting relative to each other according to their outer diameter with the aid of limbs 6. Then, the sidewalls are threaded with a threaded element 5. If necessary, the degree of protection of the connected pipes can be installed bushings. The sharp edges of the ellipsoidal hole in the case of round pipes interact with the surface of the pipe, deforming (destroying) its coating (or lubricant), preventing the connection of pipes to establish reliable electrical contact. The ellipsoidal holes of the sloping surfaces of the coupling also contribute to a more reliable retention of it on the surface of the pipe, and the oppositely inclined planes opposite each other bring the pipes closer together (Figures 1 and 4).

In addition, the ellipsoidal cut-outs located on inclined surfaces are good compensators for limiting deviations of pipe diameters and wall thickness. They also contribute to the creation of reliable electrical contact along the contour. The tightening force of the fastener, directed along the axis of the pipe being pulled, promotes the convergence of the pipe sections being joined, and bends 7 prevent the pipes from disconnecting, cutting into their surface and contacting

When tightening the threaded fastener, the inclined surfaces of the coupling directed to the plane of tightening ensure reliable mechanical strength and fixation of the jointed

Most of the constancy of the parameters is a reisolation lacquer coating or lubricant.

Thus, the implementation of the device in accordance with the invention allows to obtain a simple design coupling that provides a reliable connection with the establishment of guaranteed contact of pipes of circular and other sections, including thin-walled ones, and also allows for various connections of pipes of various sections without destroying the integrity of the pipes. or without their rotation (one

relative to the other) in the case of disassembling all or part of the network to be mounted.

Formula of the invention

1 Coupling for connecting metallic protective conduits for electrical wiring, comprising a housing with a base and having means for providing electrical contact between the sides, each

of which is designed to interact with one of the pipes, and a fastening threaded element, characterized in that, in order to simplify the construction while improving the reliability of the connection, the housing is made in the form of a U-shaped bracket with a flat base and oppositely inclined sidewalls, in each of which there is a figure-shaped hole intended for insertion of a pipe with sharp edges forming the above means for providing electrical contact, the ends, the sidewalls are connected, with each other by a threaded fastening element ntom, wherein the shape of figure Hole ti corresponds to the profile of the inclined pipe section.

2. Coupling POP.1, characterized in that the base of the bracket is made with inward bendings of the side edges intended for centering the pipes.

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fig 2

A place

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contact

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Fig l

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FIG. five

The gap with the connected works is shown conventionally. FIG. 6

Compiled by N. Borisov Editor S. Pekar Tehred M. Morgantal; Proofreader S. Shekmar

Order 5291/52 Circulation: 618

, - VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

Claim 1. A coupling for connecting metal protective pipes of electrical wiring, comprising a housing with a base and having means for providing electrical contact with the sides, each of which is designed to interact with one of the pipes, and a fastening screw element, characterized in that, in order to simplify the design while improving the reliability of the connection, the casing is made in the form of a U-shaped bracket with a flat base and counter-inclined sidewalls, each of which has a fig the hole with sharp edges forming the above-mentioned means for ensuring electrical contact, the ends and sides are connected to each other by a threaded fastener, the shape of the figured hole corresponding to the profile of the inclined section of the pipe. 2. Coupling pop. 1, characterized in that the base of the bracket is made with inwardly directed bends of the side edges, designed to center the pipes.