SU68509A1 - Coupling (clamp) for field cables - Google Patents

Description

Splicing of field air-cable lines is usually carried out in the following way: they clean the cable ends, twist the stripped ends of the current-carrying core and impose insulating tape.

In the process of maintenance and operation of air field lines, when they are guided, it takes a long time (120-180 seconds) to produce a joint (intergrowth) of the ends of the field cable.

Therefore, the idea arose of creating a simplified coupler that would speed up the process of setting the line and free it from the splicing device manually, since the splices made by the manual method increase ohmic resistance, contribute more attenuation to the line, degrade the insulation resistance, and ultimately worsen communication quality.

The previously proposed couplings do not provide sufficiently reliable insulation or mechanical strength of the joint.

The subject of this invention is a coupler (clamp), which does not have these disadvantages. It is composed of two plastic bushings that are screwed together and a centrally located double cone metal core that serves to clamp and electrically connect the separated cable cores in the bushings while screwing them. To ensure a mechanically and electrically secure connection in the sleeves, metal sleeves with a central tapered bore are pressed in to hold the cores and with transverse grooves and longitudinal corrugations on the outer surface.

FIG. 1, the proposed coupling is shown in longitudinal section, and in FIG. 2 view from the end.

The coupling consists of two bushings 7 and 2 which are screwed together with one another and made of plastic and a central galvanized metal core 3 having tapered ends.

Metal bushings 4 and 5 with tapered bores are pressed into the sleeves. These sleeves are provided on the outer surface of the cross197

Drawings with grooves and longitudinal corrugations (notches) which ensure reliable fastening of the sleeves in the plastic and prevent their longitudinal movement and rotation in the sleeves 7 and 2. Knurling is done on the outer surface of sleeves 7 and 2, preventing slipping in the hands when screwing or unscrewing.

The coupling is used as follows. Trim the ends of the connected field cable (10 to 12 mm at each end) with the help of needle nose pliers or a mounting knife. The coupling is then unscrewed, the stripped ends of the cable are inserted into the holes 6 and 7 of the coupling sleeves on both sides to make up the insulation of the cable in the shoulder pads, and the sleeves 7 and 2 are screwed.

The core-stud 3 allows the stripped ends of the current-carrying conductor of the cable to be firmly clamped between the core of the stud and the inner wall of the sleeves 4 and 5, which ensures reliable electrical contact and mechanical tensile strength (about 70-80 kg).

The proposed coupler, according to the inventors, has the following advantages (as compared to the conventional splicing of field cables):

FIG. I

a) reduces the time for splicing 4-5 times;

b) improves electrical contact;

c) reduces the ohmic resistance of the line;

d) simplifies the technique of splicing field cables;

d) with mass production gives great economic benefits;

e) makes it possible to improve the overall characteristics of the line.

Subject invention

Coupling (clip) for field cables, consisting of two plastic bushings that are screwed together and a centrally located double cone metal core, used to clamp and electrically connect the separated cable cores in the bushings for screwing the latter, characterized in that joints in the sleeves are pressed metal sleeves with a central conical hole for clamping the cores and with transverse undercuts and longitudinal corrugations on the outside surface.

FIG. 2