SU1312670A1 - Method of splicing multiconductor electric cables - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the installation of ship cables. The goal is to increase reliability. The slyuba is concluded in that the insulated conductors 1 of cable 2 are connected by contact elements 3, on the middle part of which a layer of rubber 5 is preliminarily applied and vulcanized. Then each splice is wrapped with a thin layer of raw rubber, after which all joints are placed in rubber bulk and cure. The hard rubber 3 applied in advance is not softened during the vulcanization of the entire assembly, which excludes the possible contact of the contact elements 3. 2 Il. (JO; about o

Description

113

The invention relates to electrical engineering, in particular, to methods of splicing electrical cables.

The purpose of the invention is to increase reliability.

FIG. 1 shows a section of the stranded electric cables proposed by the proposed method, a longitudinal section; in fig. 2 - contact element for splicing stranded electrical cables.

The method is implemented as follows.

The ends of the strands 1 of the spliced cables 2, freed from insulation at a length equal to the depth of the holes at the ends of the rods 3, are inserted into the said holes and pressed together. Shaping shape in cross-section: hexagon - for lived with cross-section 35 mm and higher, square - for lived with cross-section up to 25 mm. Before the crimping surface of the groove of the rod 3, before crimping, a layer of rubber 5 is applied according to a known technology to vulcanise under shop conditions. The diameter of the applied rubber layer 5 exceeds the diameter of the rod, free from rubber. The contact elements fastened on the cores are wrapped tightly in half-overlap with a thin layer of rolled (raw) rubber. After that, all splices are wrapped with rolled rubber 6, overlapping the outer sheaths of cables 2 and curing the splicing.

Example. Spliced cables such as PRC 2.5x7. Insulation is removed from the cable cores over a length of 10 mm. A rubber layer is vulcanized onto a rod made of brass in workshop conditions. The length of the rod is 60 mm, the length of the ends of the rod without rubber is 10 mm, the diameter of the vulcanized rubber layer is 7 mm, and the length is 40 mm. The ends lived 1 ka126702

Bel 2 is inserted into the holes at the ends of zh 3 and pressurized. Then each of the rods is tightly half-closed with the insulation on the core and is wrapped with 5 wet rubber 0.4 mm thick. After that, all intergrowths are wrapped with rubber-coated rubber and vulcanized in a manual vulcanizer at 150 C.

The previously applied hard rubber is not softened in the process of vulcanization of the intergrowth, which excludes the possible contact of contact elements with each other at pressures up to 15 kg / cm, which is maintained during vulcanization. For rubber sintering during the vulcanization process, rods are required to be wound with a thin layer of rubber 0.2-0.6 mm thick. The longitudinal tightness of the splice is ensured by the rubber mass 4, which has good adhesion to the material of the outer shell and insulation of the cores. As shown by tests, the splice withstands the pressure of the external environment on the end of the cable at 200 kg / cm.

Claims (1)

Invention Formula A method of splicing multiconductor electrical cables, consisting in connecting the cores with contact elements, applying a layer of unvulcanized rubber on each resulting splicing and placing all the splices in a common rubber array with overlapping part of the outer sheaths of cables with subsequent vulcanization, characterized in that , before the contact element is connected to the cable cores, an additional layer of rubber is applied to the middle part of the contact element and cured. VNIIPI Order 975/52 Circulation 619 Random polygons pr-tie, Uzhgorod, st. Project, 4 FIG. 2 Subscription