Novel bidirectional sealing sleeve

Abstract

Disclosed in the invention is a novel bidirectional sealing sleeve comprising a sealing sleeve body. The sealing sleeve body consists of an axial sealing element and a radial sealing element that are connected mutually and have elasticity; and the axial sealing element and the radial sealing element are integrated into one. The axial sealing element is a cylindrical sleeve body holding the surface of an insulating shielding layer of a cable to form axial sealing. The radial sealing element is an annular gasket body that is compressed between a sealing flange and an inner tube flange of a cable terminal by the sealing flange to form horizontal sealing. The annular gasket body is arranged at the periphery of the cylindrical sleeve body and the center of the annular gasket body is overlapped with the center of the cylindrical sleeve body. Therefore, the sealing effect is improved; the potential safety hazard of oil leakage is reduced; the product quality and the safety coefficient of accessory operation of the cable are improved; and sealing of cables with different specifications can be realized by using a few of specifications.

Description

technical field [0001] The invention relates to a sealing piece for an oil-filled terminal of a cable with a voltage level of 66kV and above, in particular to a novel bidirectional sealing sleeve. Background technique [0002] There are various types of cable oil-filled terminals, the oil-leakage seal, the radial seal mainly adopts the wrapped waterproof belt, the axial seal mainly adopts the ordinary O-ring, or both the axial and radial seals adopt the O-ring (relatively rare) for sealing. For cable accessories, there are many specifications for cables of each voltage level. Even for cables of the same specification at the same voltage level, due to different manufacturers or different production processes, the outer diameter of the insulation shield of the cable is different. There is a big difference, and there is no predictability, so it is impossible to use O-rings for sealing, and most of the radial directions are sealed with wrapping waterproof belts. Because of the...

AI Technical Summary

Problems solved by technology

For cable accessories, there are many specifications for cables of each voltage level. Even for cables of the same specification at the same voltage level, due to different manufacturers or different production processes, the outer diameter of the insulation shield of the cable is different. There is a big difference, and there is no predictability, so it is impossible to use O-rings for sealing, and most of the radial directions are sealed with wrapping waterproof belts

Due to the manual wrapping, the wrapping is very random. Even the best wrappers will have different tightness, different sizes, and poor roundness at the wrapping parts, so the sealing performance cannot be guaranteed.

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