Stretch-proof and water-proof insulating bushing for connected cable and use method

Abstract

The invention discloses a stretch-proof and water-proof insulating bushing for a connected cable, and particularly relates to a protective bushing, which is provided with dual seals of Haff-connected silicone sealing gum and a sealing ring, is used for enhancing the tensile strength of the connected cable and improving the water resistance and insulating performance of a cable joint position, and belongs to the technical field of cable protection. The stretch-proof and water-proof insulating bushing consists of protective tubes, retainer rings, silicone sealing gum, hubbed flanges, sealing rings, Haff end covers and Haff pressure plates, and is characterized in that: the two ends of the protective tubes are provided with flanges, and are arranged in the middle of a cable joint; the silicone sealing gum is filled into the middles of the retainer rings in the protective tubes and the hubbed flanges; the Haff end covers are pressed against the sealing rings, and are screwed into the external threads of the hubbed flanges through internal threads; the Haff end covers and the cable are fastened by using the Haff pressure plates via bolts; and fittings on both sides of the protective tubes are the same as each other and are in opposite directions. The bushing has high leak tightness and high insulativity on the cable joint, the connected cable has high tensile strength, and the aims of sealing the connected cable in a dual way and enhancing the tensile strength of the connected cable are fulfilled.

Description

technical field [0001] The invention relates to a stretch-resistant and waterproof insulating sleeve for a connecting cable, in particular to a silicone sealant and sealing ring double-sealed for a Huff connection to improve the tensile strength of the connected cable and increase the waterproof performance and insulation of the cable joint. Performance protective casing. Background technique [0002] In the installation of industrial cables, due to changes in the specific conditions of the construction site, the cables cannot be completely straightened and used. It is often encountered that the actual installation length is greater than the length of the existing cables. During cable maintenance, the cable connection will also be encountered. When cables need to be connected, the method of known technology is to adopt methods such as branching box, underground cable well, winding waterproof adhesive tape outside cable to ensure cable insulation. The cables using the above ...

AI Technical Summary

Problems solved by technology

The cables using the above methods cannot guarantee the insulation performance of the cables in harsh environments such as outdoor humid environments, underground aquifers, and underwater.

Especially when the cable is pulled during construction in a harsh environment, because it is impossible to make the connection length of the cable core exactly the same when the cable is connected, the cable core is pulled by external force when the length is different, which will cause the connection position to be insulated. Layer tearing, cable core breakage, causing serious hidden dangers and unavoidable consequences to construction safety and electricity safety, resulting in irreparable losses

Therefore, if the length of the cable used in harsh environments is not enough or during maintenance, in order to avoid safety accidents, the method of replacing the cable is generally used. Although this method is simple, there are problems such as long construction period, high cost, high construction difficulty, and high comprehensive cost.

[0003] Search the patent literature, although there is a similar technical solution, the patent name is: cable joint sealing and locking protection device (patent number: 201020173740.2). There is a sealing groove and a rubber ring inside the seal. When the sealing nut is locked, the toothed seal is locked accordingly, so as to improve the tensile strength of the cable and protect the sealing of the shell. However, this technical solution can only be used for small Cables with large cross-sections and industrial cables with large cross-sections are self-heavy, and the force is large when pulling the cable. During construction, the extrusion force and friction generated by the lock nut alone cannot resist the cable pulling force, especially when the cable is subjected to other mechanical forces. When movement occurs, the cable protection shell of this patent cannot reliably protect the cable. When the cable passes through the deep water of the seabed, the deeper the seabed, the greater the pressure. At the same time, the ocean current disturbs the cable. The technical solution of this patent cannot guarantee the tensile strength of the cable connection position. Strength and waterproof sealing performance

At present, there is no protective sleeve with a silicone sealant and sealing ring double-sealed by Huff connection, which can improve the tensile strength of the connected cable and increase the waterproof performance and insulation performance of the cable joint. There is no new technology for this technology when searching for patent documents. Open plan

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