SU1376166A1 - Device for connecting electric cables - Google Patents

Abstract

This invention relates to electrical engineering, namely cable fittings. The goal is to increase electrical strength, simplify fabrication, increase service life and reduce costs. The device contains a detachable metal housing 1, in which the cores 4 are interconnected by metal guides, you 5. The housing cavity is filled with insulating material 6) polymerization of composition 5 including methyl methacrylate, benzene peroxide, polystyrene powder, dimethyl - aniline and filler. In this case, a polyethylene sheath 7 is located between the housing 1 and the insulating material, which ensures a reduction in the volatility of the acrylate component during the impregnation and curing of the composition; 1 il. 9

Description

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The invention relates to the construction of cable power lines, namely, the connection of cable sections and repair during cable breakdown in distribution networks.

The purpose of the invention is to increase the dielectric strength, simplify manufacture, increase service life and reduce costs.

The drawing shows the structure of the proposed device for connecting electrical cables.

The device for connecting electrical cables includes an outer metal housing 1, which is made in the form of two truncated cones connected by a cylinder, in which ends 2 of cable 3 and divided cores 4 are interconnected by metal sleeves 5. In the metal case 1, Polymer concrete 6 is located for repeated use, polymer concrete 6 is located, and polyethylene sheath 7 is placed between housing 1 and polymer concrete 6, in addition, the device contains a grounding conductor 8.

The assembly of the proposed device is carried out as follows.

After cutting the ends 2 of the connected electrical cables 3 using the sleeves 5 and the soldering, they are placed in the housing 1 with a polyethylene sheath 7 inside it. Then the sheath 7 is filled with a mixture of dry components of polymeric concrete. The dry mixture is prepared in advance in the conditions of workshops, which includes the following components: andesitic or diabase flour, powdered polystyrene, benziol peroxide, quartz sand, granite rubble, thoroughly mixed together. At the place of installation, after laying the dry mixture with compaction (for example, j with a pinning or shaking), it is impregnated with a liquid component of polymer concrete, consisting of a pre-mix.

mixed methyl monomer--.

methacrylate with dimethylaniline, and the liquid component is impregnated from the bottom of the dry mixture by introducing into the mixture laterally across the body of the tubes, the ends of which reach 55 to the lower surface of the mixture, and the other ends are connected to the reservoir. Liquid components from the tank through the tubes come in a dry mixture, with

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than the liquid flow, which forces air out of the dry mixture, fills the intergranular space from bottom to top. After impregnation, the tubes are pulled out of the composition, then it is re-compacted, after which the composition is covered with a polyethylene sheath, and the housing 1 is covered with a cap until the polymerization process is completed.

The presence of the polymer shell ensures a decrease in the volatility of the acrylate component during the impregnation and curing of the polymer concrete mixture. Then a detachable body and polymer concrete sleeve with a polyethylene sheath can be removed from the hardened polymer concrete and placed in a trench.

Claims (1)

The proposed device has high dielectric strength, high service life and low cost. Apparatus of the Invention A device for connecting electrical cables, comprising a split housing, in the inner cavity of which the ends of the cable with wires fixed at a distance from one another and insulating material obtained after polymerization of a composition comprising a curable component, hardener, granite rubble, quartz sand, are placed andesitic or diabase flour, which is different from the fact that, in order to increase the electrical strength, simplify manufacture, increase the service life and reduce the cost, with "- Tav comprises further modifier - powdered polystyrene and accelerator - dimethylaniline, as the polymerizable component comprises methyl methacrylate, and as hardener - benzoyl peroxide with the following quantitative ratio of components, mass%:. Methyl methacrylate 7.0-9.0 Benzoyl peroxide0, 5-0.7 Powdered, polystyrene 0.4-0.6 Dimethylaniline 0.14-0.27 Andesitov or diabase flour 13.0-15.0 Quartz sand 37.0 -42.0 Granite crushed stone Else, with a polyethylene sheath placed between the split housing and the insulating material.