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Repairing liquid injection system for cross-linked cable

A technology for injecting systems and cross-linked cables, which is applied in the direction of insulation/armored cable repair equipment, cable installation, cable installation devices, etc., which can solve hidden dangers, repair hydraulic pressure and injection speed, and injection volume without control and display Design, there is no way to control the injection volume and injection pressure, etc., to achieve the effect of guaranteeing injection quality

Inactive Publication Date: 2008-12-03
中国华北电力集团公司天津市电力公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. The existing injection method of cable repair fluid uses high-pressure gas to directly provide pressure for the repair fluid, and the resulting pressurized repair fluid is injected into the cable through a special terminal head. During this process, the flow of the repair fluid injected into the cross-linked cable The injection speed, injection volume and pressure can only be estimated by the liquid level gauge of the repair liquid tank. There is no way to control the injection volume and injection pressure. This is especially true when injecting cross-linked cables at three ends; 2. There is no control and display design for the pressure, flow rate, and injection volume of the repair fluid, and the composition of the repair fluid is harmful and flammable substances, which have great potential hidden dangers

Method used

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  • Repairing liquid injection system for cross-linked cable
  • Repairing liquid injection system for cross-linked cable
  • Repairing liquid injection system for cross-linked cable

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Embodiment Construction

[0018] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0019] The cross-linked cable repair liquid injection system is composed of a gas pressure tank 13, a repair liquid tank 9, a connecting pipeline 1, and a liquid outlet pipe 19, and the connecting pipelines between the gas pressure tank and the repair liquid tank are respectively installed with limited A pressure valve 10, an electromagnetic switch valve 11 and a pressure sensor 12 are connected through connecting pipelines among several devices. The pressure gas contained in the pressure gas tank is nitrogen or inert gas, and this type of gas has no other side effects on the electric field generated in the insulator. A pressure limiting valve 5, an electromagnetic switch valve 4, a pressure sensor 3 and a liquid flow distribution plate 2 are respectively installed in sequence on the connection pipeline between the repair liquid tank and the liquid...

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Abstract

A preparing liquid injecting system for the cross-linked electric cable is composed of a compressed gas tank, repairing liquid tank, connecting pipelines and liquid outlet tube. The pressure limiting valve, electromagnetic valve, pressure sensor, and liquid flow distributing plate are respectively installed to relative connecting pipelines.

Description

[0001] Field [0002] The invention belongs to the field of cables, in particular to a cross-linked cable repair fluid injection system. Background technique [0003] Generally, there will be a certain amount of water in the body of the cross-linked cable running underground. After a long-term operation of this kind of cable, the cable insulation will be degraded by water trees to varying degrees. After some cables have been in operation for 15 to 20 years, the insulation aging caused by water trees has been quite serious, and it is difficult to continue to operate. For this reason, the power supply department has to spend huge sums of money to update it. [0004] In order to solve this problem, people have found after in-depth research that the moisture in the XLPE cable body can form surface water trees on the XLPE insulation under the action of an electric field, resulting in insulation degradation. Therefore, how to remove the moisture in the cable body It is the best wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/00H02G1/16
Inventor 朱晓辉田明辉
Owner 中国华北电力集团公司天津市电力公司
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