Middle joint connection tube of phase-change temperature-control type high-voltage cable

A technology of high-voltage cables and intermediate joints, applied in the direction of cable joints, etc., can solve the problems of overheating of joints, accelerated thermal aging of cable joints, and different joint production, so as to reduce operating temperature, prolong service life, and avoid overheating failures.

Inactive Publication Date: 2014-09-10
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the uneven skill level of on-site operators and the wide variety of actual joint production, it is difficult for conventionally designed connecting pipes and cable joints to meet the relevant electrical performance requirements.
Thus, the thermal aging of the cable joint is accelerated, causing the joint to overheat or even fail.

Method used

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  • Middle joint connection tube of phase-change temperature-control type high-voltage cable
  • Middle joint connection tube of phase-change temperature-control type high-voltage cable
  • Middle joint connection tube of phase-change temperature-control type high-voltage cable

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Embodiment Construction

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] Phase change materials (PCM for short) are a special class of functional materials, which can undergo phase transitions (mostly solid-liquid phase transitions or gas-liquid phase transitions) under isothermal or near isothermal conditions, accompanied by large energy ( Commonly referred to as latent heat of phase change) absorption or release, this feature is the reason and basis for this type of material to have a wide range of applications. The composite phase change material overcomes many problems in the use of traditional phase change materials, and has many excellent properties: (1) The stored thermal energy is large and the temperature can be adjusted. (2) It can be directly formed and processed, and the requirements for the container are not high or even directly used as a skeleton material without the need for container ...

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Abstract

The invention discloses a middle joint connection tube of a phase-change temperature-control type high-voltage cable, and relates to the technical field of high-voltage cable connection. The tube comprises a tube body, the tube body is divided into an inner tube main body and an outer tube main body, filler is arranged between the inner tube main body and the outer tube main body, and the filler comprises a composite phase-change material. By means of the phase-change temperature-control function of the organic composite phase-change material, the temperature of a cable joint is lowered through the connection tube, the thermal aging process of the cable joint is controlled, the fault that the cable joint is too hot caused due to impact load and the like is avoided, and the service life of the cable is prolonged.

Description

technical field [0001] The invention relates to the technical field of high-voltage cables. Background technique [0002] With the further increase of the state's investment in the power industry and the further deepening of the urban network transformation work, power cables have been widely used. However, with the increase in the use of cables, the number of intermediate joints of cables has increased sharply, and the faults at the joints and the accidents caused by them have become more and more obvious. The intermediate joint is the weak link of the high-voltage cable because the insulation at the end of the cable is cut off during the production process of the intermediate head of the cable, which causes the electric field there to be distorted. The distorted field strength will cause considerable additional loss on the wire connecting tube and the outer sheath, thereby accelerating the thermal aging process of the cable intermediate joint, and causing thermal failure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G15/18
Inventor 郭刚郝春生郜志李雪松韩卫星张金彪
Owner STATE GRID CORP OF CHINA
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