Fully-sealed buried cable branch box

Abstract

The invention discloses a fully-sealed buried cable branch box, comprising a tank, an insulated mast, a sealing cover on the tank, an incoming line cable and an outgoing line cable, wherein the tank is filled with insulating materials; a side wall of the tank is provided with a pipeline; a port of the pipeline is provided with a fixed flange which is fixed with an inner wall of the pipeline mutually and a movable flange; the movable flange is provided with a through hole; and the incoming line cable and the outgoing line cable pass through the through hole. The cable branch box has the advantages that the volume is small, the cost is low, the water-moisture proof effect is good, the induced over voltage withstand performance is high, the lands are saved, the cities are beautified, and thefully-sealed, fully-insulated and touchable effect can be reached. The cable branch box is a high-performance product which can be operated in rivers, lakes and seas, and the cable branch box has good application prospects.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a fully enclosed buried cable branch box. Background technique [0002] A cable branch box is a device used to distribute power supplies. At present, most of the cable branch boxes are installed on the ground, which not only occupies the increasingly expensive urban ground area, but also is very unsightly. In addition, it also poses a certain threat to people's life safety. [0003] Patents 200620036324.1, 200810025777.8 and 200820145643.5 all propose a solution that can solve the above defects, but there are certain problems in all three, for example: the common point of patents 200620036324.1 and 200810025777.8 is the use of cable plugs and the need for prefabricated cement pools , 20081005777.8 requires a drainage system. Once the drainage system fails, there may be problems with the cable head. Secondly, the sealing rubber pad used in the above-me...

AI Technical Summary

Problems solved by technology

At present, most of the cable branch boxes are installed on the ground, which not only occupies the increasingly expensive urban ground area, but also is very unsightly. In addition, it also poses a certain threat to people's life safety.

[0003] Patents 200620036324.1, 200810025777.8 and 200820145643.5 all propose a solution that can solve the above defects, but there are certain problems in all three, for example: the common point of patents 200620036324.1 and 200810025777.8 is the use of cable plugs and the need for prefabricated cement pools , 20081005777.8 requires a drainage system. Once the drainage system fails, there may be problems with the cable head. Secondly, the sealing rubber pad used in the above-mentioned patented product is positive pressure, and the main purpose is to prevent external water from entering the box. Now the invented The seal used in the product is negative pressure, mainly to prevent the leakage of internal insulating materials such as asphalt or silicone rubber; patent 200820145643.5 also requires the use of prefabricated cement boxes or large iron boxes, which are too large and costly

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