Thermal-shrinkage waterproof sealing cap for high-voltage cable

Abstract

The invention belongs to the field of waterproof sealing caps for sealing cable pipe orifices, and specifically relates to a thermal-shrinkage waterproof sealing cap for a high-voltage cable. The sealing cap is low in dependence on the diameter of the cable and the diameter of a casing pipe, and can achieve the better sealing of guide cables and casing pipes in various sizes. The sealing cap employs an insulating material, and a fire retardant is added for preparation, so the waterproof performance is excellent. The sealing cape is suitable for the protection and sealing of various types of cable pipe orifices, such as a cable protection tube and a cable incoming and outgoing mouths of a transformer substation. The sealing cab can achieve the waterproof, fireproof and insulating functionsat the same time, facilitates the early construction operation and the later maintenance management, and no metal part is exposed outside. The sealing cap is good in aging resistance, insulating performance, waterproof and fireproof performances, is good in corrosion resistance, and is good in application prospect.

Description

technical field [0001] The invention belongs to the field of waterproof sealing caps used for sealing cable nozzles, in particular to heat-shrinkable waterproof sealing caps for high-voltage cables. Background technique [0002] The substation leads the guide cable on the ground from the cable trench. It is necessary to seal the gap between the casing and the cable. Fire-proof mud is mainly used. Although this method can protect the sealing part in the short term, it will be difficult to seal it only with fire-proof mud. It causes problems such as unreliable sealing and loose fastening. The fireproof mud is also susceptible to cracks or cracks due to the influence of external conditions over time, and there are certain potential safety hazards. Especially in winter, rainwater will immerse in the casing and freeze, which will eventually cause cable failure in the casing. Therefore, developing a cable waterproof sealing cap that is easy to install and maintain has become a pro...

AI Technical Summary

Problems solved by technology

[0002] The substation leads the guide cable on the ground from the cable trench. It is necessary to seal the gap between the casing and the cable. Fire-proof mud is mainly used. Although this method can protect the sealing part in the short term, but only using fire-proof mud to seal will cause damage. It causes problems such as unreliable sealing and loose fastening. The fireproof mud is also susceptible to cracks or cracks due to the influence of external conditions over time, and there are certain safety hazards

Especially in winter, rainwater will soak into the casing and freeze, which will eventually cause cable failure in the casing. Therefore, it is an urgent problem to develop a cable waterproof sealing cap that is easy to install and maintain.

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