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Jellify resistance power cable

A power cable and freezing technology, which is applied in the field of power cables, can solve the problems that power cables cannot resist severe freezing disasters, and achieve a good anti-freezing effect

Inactive Publication Date: 2009-08-19
刘华友
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing power cables cannot resist severe freezing disasters, the present invention provides an anti-freezing power cable, which can solve the problem that the power cables cannot resist severe freezing disasters

Method used

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Embodiment Construction

[0017] The structural details of the anti-freezing power cable of the present invention will be described below in conjunction with the drawings and principle experiments.

[0018] Such as figure 1 As shown, the running sub-cable (1), the auxiliary sub-cable (2) and the electric heater (3) are electrically connected by contact or connection, when the voltages in the running sub-cable (1) and the auxiliary sub-cable (2) are not equal , that is, a current flows through the electric heating body (3), and the electric heating body (3) can generate heat.

[0019] When the electric heating body (3) is an annular electric heating ring (5), such as figure 2 , Figure 5 As shown, the auxiliary sub-cable (2) is set outside the steel core (4). Outside the electric heating ring (5), there is an insulating ring (7) between every two electric heating rings (5) to separate. Electric heating ring (5) is made of PTC electric heating material.

[0020] The voltage environment during the p...

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Abstract

The current power cable can thaw proper amount of ice and snow by producing certain amount of heat after being electrified, but can not play a role in thawing ice and snow by virtue of the generated heat due to the independent operation of the power cable when freezing is very severe. The invention adopts the following technical proposal for solving the defect existing in the current power cable: each anti-freezing power cable or each anti-freezing power cable in multi-division is provided with an operating sub-cable, an auxiliary sub-cable and an electric heating body, wherein, the operating sub-cable and the auxiliary sub-cable form a current conduction path by being contacted or connected with the electric heating body which is annular and linear; the annular electric heating body is arranged between the operating sub-cable and the auxiliary sub-cable while the linear electric heating body enwinds outside the operating sub-cable and the auxiliary sub-cable after being insulated by insulation material; and the electric heating body has the set temperature of 5 DEG C to 7 DEG C and the voltage of 5V and 800V. When the voltages of the operating sub-cable and the auxiliary sub-cable are different, current passes through the electric heating body and then the electric heating body can thaw ice by generating heat.

Description

technical field [0001] The present invention relates to power transmission equipment, especially power cables. Background technique [0002] There is a certain resistance in the existing metal power cable, so the cable will generate a certain amount of heat after power-on operation. According to the existing standard design, this heat can melt the ice with a diameter of no more than 10mm, but when the ice and snow condense too much, especially if the freezing is serious For example, in the severe freezing disaster in January 2008, the maximum diameter of ice covering power cables in Kaiyang County, Guizhou Province exceeded 150 mm. Such a large amount of ice is far from being able to melt due to the heat generated by the power cables alone. As a result, the cable breaks, the tower collapses, and the power supply is interrupted. It is considered to use SPC technology to de-ice power cables, but the voltage matching of SPC technology is not a small problem when used on power ...

Claims

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Application Information

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IPC IPC(8): H01B9/00H01B7/42
Inventor 刘华友
Owner 刘华友
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