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Thermal shrinkage and cold expansion type self-on-off cable sheath

A cable sheathing, cold expansion type technology, applied in the direction of insulated cables, power cables with shielding/conducting layers, cables, etc., can solve the problem of low transmission efficiency of cable power, inability to maintain cable temperature, high brittleness and easy damage and other problems, to achieve the effect of accelerating heat dissipation, ensuring the efficiency of power transportation, and improving the efficiency of dissipation.

Active Publication Date: 2020-10-13
DATANG LIAOYUAN POWER PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the cable is used for power transmission, it usually generates more heat, so the general cable sheath has a good heat dissipation effect, but under different external temperatures, the heat dissipation required by the cable itself is different. For example, in winter, The temperature is low, and the efficiency of the cable for power transmission is low. At this time, its good heat dissipation performance cannot maintain a certain temperature of the cable, making it brittle and easy to be damaged, and it is not conducive to power transmission.

Method used

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  • Thermal shrinkage and cold expansion type self-on-off cable sheath
  • Thermal shrinkage and cold expansion type self-on-off cable sheath
  • Thermal shrinkage and cold expansion type self-on-off cable sheath

Examples

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Effect test

Embodiment 1

[0038] see figure 1 , a heat-shrinkable and cold-expandable self-switching cable sheath, comprising an inner insulating layer 1, a shielding layer 2, a protective interlayer 3 and an outer sheath 4, an inner insulating layer 1, a shielding layer 2, a protective interlayer 3 and an outer sheath 4 are distributed sequentially from the inside to the outside, and the adjacent two are fixedly connected to each other, and the inside of the protective interlayer 3 is inlaid with a plurality of uniformly distributed thermal shrinkage and cold expansion mechanisms.

[0039] see figure 2 The end of the heat shrinkage and cold expansion mechanism away from the protective interlayer 3 is embedded in the outer sheath 4, the heat shrinkage and cold expansion mechanism includes a transverse temperature sensing rod 7 and a heat shrinking and cold expansion plate 5 fixedly connected to both ends of the transverse temperature sensing rod 7, two One end of the heat-shrinkable and cold-expandab...

Embodiment 2

[0043] The transverse temperature sensing rod 7 is made of an elastic sealing material filled with an inert gas with high thermal conductivity. The filling degree of the inert gas is saturated filling. At high temperatures, the expansion of the gas is faster than that of the solid material itself, which can further improve Sensitivity of the lateral temperature-sensing rod 7 to temperature changes.

[0044] The biggest difference between this embodiment and Embodiment 1 is the different settings of the transverse temperature-sensing rods 7 , and other contents are consistent with Embodiment 1.

[0045] Through the setting of the thermal shrinkage and cold expansion mechanism, when the external temperature is high, the transverse temperature sensing rod 7 is heated and expanded, so that the upper ends of the two thermal shrinkage and cold expansion plates 5 are close to each other in a state of "heat shrinkage". The on-off heat-conducting rod 10 is in contact with the heat-cond...

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Abstract

The invention discloses a thermal shrinkage and cold expansion type self-on-off cable sheath, and belongs to the field of cables. According to the thermal shrinkage and cold expansion type self-on-offcable sheath, through arranging a thermal shrinkage and cold expansion mechanism, when external temperature is high, a transverse temperature sensing rod is heated to expand, the upper ends of the two thermal shrinkage cold expansion plates are close to each other and are in a thermal shrinkage state. At the moment, the self-on-off heat-conducting rod is contacted with the heat-conducting block,the heat is dissipated to the outside of the outer sheath along the self-on-off heat conduction rod. Compared with the prior art, heat is directly dissipated from the heat conduction block to the outside of the outer sheath by taking air as a heat dissipation medium, the heat dissipation efficiency is obviously improved. When temperature is low in winter, the transverse temperature sensing rod shrinks, at the moment, the distance between the two thermal shrinkage and cold expansion plates is large, the two thermal shrinkage and cold expansion plates are in a cold expansion state, the self-on-off heat conduction rods do not make contact with the heat conduction blocks, heat at the heat conduction blocks is dissipated out of the outer protection layer through air serving as a medium, the heat dissipation efficiency is low, the temperature of the cable is effectively kept, and the normal power transmission efficiency at the low temperature is effectively guaranteed.

Description

technical field [0001] The invention relates to the field of cables, in particular to a heat-shrinkable and cold-expandable self-connecting and breaking cable sheath. Background technique [0002] Cables are usually composed of several wires or groups of wires. Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mine cables, aluminum Alloy cables and more. They are all composed of single or multi-strand wires and insulation layers, and are used to connect circuits, electrical appliances, etc. [0003] The cable is usually provided with a sheath, and the use of a cable protection sleeve to protect the cable can achieve the following advantages: 1. Good corrosion resistance, long service life, and can be used in humid saline-alkaline areas. 2. Flame retardant and heat resistant, it can be used for a long time at a high temperature of 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/42H01B7/17H01B7/18H01B7/28H01B9/02
CPCH01B7/428H01B7/17H01B7/18H01B7/28H01B9/02Y02A30/14
Inventor 王保林
Owner DATANG LIAOYUAN POWER PLANT
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