Underground cable

Abstract

The invention discloses an underground cable which comprises more than one cable arranged in a cable well, wherein the bottom part of each cable is provided with a supporting base plate (6), the supporting base plates (6) are arranged in the length direction of the cable, each supporting base plate (6) has an arc-shaped sealing surface, the cable is partially buckled into the arc-shaped sealing surfaces and makes contact with the arc-shaped sealing surfaces, and more than one concave cavity (4) is formed in each supporting base plate (6) in the length direction of the supporting base plate (6). The movable section of the cable in the area can be overturned after the surface layer of the cable is damaged, so that an originally exposed damaged opening is overturned to the bottom to be sealed and hidden, thus a plurality of problems can be solved, physical fire extinguishing and gas fire extinguishing can be achieved in emergency, the use safety of underground cable arrangement is improved, and the service life of the underground cable arrangement is prolonged.

Description

technical field [0001] The invention relates to the field of cables, in particular to a downhole cable. Background technique [0002] A large number of cables are laid in the cable shaft, and these cables have long spans and are difficult to overhaul. After the underground cable is laid, the cable will age with the passage of time, so there may be cases of spontaneous combustion. At present, the fire resistance of this type of underground cable is poor. Once a local fire occurs, the fire will spread rapidly and cause a serious fire. [0003] Furthermore, these cables laid underground are laid underground for a long time in a static state, and there will be many organisms such as rats in the well. Misoperation of equipment, etc., will cause damage to the surface of the cable, and after the surface of the cable is damaged, due to long-term exposure of the damage, external water vapor or dust will enter the cable through the damage of the surface and act on the core wire, even...

AI Technical Summary

Problems solved by technology

[0002] A large number of cables are laid in the cable shaft, and these cables have long spans and are difficult to repair

After the underground cable is laid, the cable will age with the passage of time, so there may be cases of spontaneous combustion. At present, the fire resistance of this type of underground cable is poor. Once a local fire occurs, the fire will spread rapidly and cause a serious fire.

[0003] Furthermore, these cables laid underground are laid underground for a long time in a static state, and there will be many organisms such as rats in the well. Misoperation of equipment, etc., will cause damage to the surface of the cable, and after the surface of the cable is damaged, due to long-term exposure of the damage, external water vapor or dust will enter the cable through the damage of the surface and act on the core wire, eventually The core wire will be damaged, and the damaged opening exposed for a long time will become the entry point for destroying the core wire. Therefore, the current static laying method of downhole cables has certain safety hazards

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