Underground high voltage cable junction box

Abstract

A distribution box for underground high-voltage cable features that its box body except top part is buried in the ground. On its top part, there are manhole with cover, at least one antiexploding hole with antidust cap and at least one switch operating hole with cover for operating three load switches in the box, On its bottom, there are cable inlet and outlet tubes. On its external surface, there are anticorrosion layer and grounding iron band. Its advantages are simple structure, high safety and convenient application.

Description

technical field [0001] The invention relates to an underground high-voltage cable distribution box. Background technique [0002] In a 10kv cable power supply system, a trunk cable needs to branch out several branch cables at different locations. At present, a high-voltage cable distribution box is usually used to branch the cables. The high-voltage cable distribution box is a rectangular box. The cable distribution box first needs to build a cable room underground. After the high-voltage cable distribution box is installed, it is erected on the cable room. The current high-voltage cable distribution box has the following problems: [0003] 1. Since the main line cables are usually laid along the green belts or sidewalks on both sides of the road in the urban area, a high-voltage cable distribution box is installed every 300 meters or so, which is not beautiful and sometimes hinders pedestrians. Once the high-voltage equipment in the box In the event of a short circuit, hea...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the main line cables are usually laid along the green belts or sidewalks on both sides of the road in the urban area, a high-voltage cable distribution box is installed every 300 meters or so, which is not beautiful and sometimes hinders pedestrians. Once the high-voltage equipment in the box In the event of a short circuit, heat waves may break open the door or lid, endangering the safety of passing vehicles and pedestrians;

[0004] 2. The underground high-voltage cable junction box erected on both sides of the road needs to be ventilated to drive away the tide, and there are vents on the box body, so the sealing is poor. After a long time of use, a large amount of dust will accumulate in the box;

[0005] 3. Because there are cables passing through the underground cable room and the underground high-voltage cable distribution box on the ground, it is not easy to seal. When the ground temperature is very low, the moisture in the underground cable room will enter the underground high-voltage cable distribution box along the cable. Condensation into water droplets in the underground high-voltage cable distribution box will cause discharge of high-voltage equipment;

[0006] 4. When floods enter the underground high-voltage cable distribution box, it will seriously endanger the normal operation of the underground high-voltage cable distribution box;

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