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Passive cable joint temperature detector based on magnetic induction structure

A technology for temperature detectors and cable joints, which is applied to thermometers, thermometers, and thermometers that use directly heat-sensitive electric/magnetic components, and can solve problems such as inaccurate temperature measurement and achieve accurate monitoring.

Pending Publication Date: 2020-09-18
NINGBO TRANSMISSION & DISTRIBUTION CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The structural scheme provided by this application avoids the disadvantages of the blind zone in the prior art for the temperature measurement of the cable joint and the technical problem of inaccurate temperature measurement in non-contact for the contact mode and principle of the cable joint respectively.

Method used

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  • Passive cable joint temperature detector based on magnetic induction structure
  • Passive cable joint temperature detector based on magnetic induction structure
  • Passive cable joint temperature detector based on magnetic induction structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Combined with the manual Figure 1-6 , Figure 11-15 A passive cable joint temperature detector based on a magnetic induction structure is shown, including an explosion-proof blanket 3 wrapped and installed on the cable joint and an electrical box 2 for processing and sending temperature information collected from the explosion-proof blanket 3, the explosion-proof The blanket 3 is equipped with a temperature acquisition unit for collecting the temperature of the cable joint and a power supply unit 5 that generates an induced current as the power supply of the electrical box 2 through the alternating current in the detected cable 1, and the power supply unit 5 is one or more An electromagnetic induction coil structure installed axially or circumferentially along the cable 1. The electromagnetic induction coil structure is an integral structure in which the copper wire coated with an insulating medium is wound clockwise or counterclockwise on the winding roller or glued....

Embodiment 2

[0052] Combined with the manual Figure 7-10 A passive cable joint temperature detector based on a magnetic induction structure is shown, including a temperature acquisition unit that uses contact to acquire the temperature of the cable joint, and is used to process the temperature data acquired by the temperature acquisition unit and send it to the electrical box of the background server , and a power supply unit that provides electrical energy for the electrical box, the temperature acquisition unit uses an explosion-proof blanket that is physically wrapped around the circumference of the detected cable joint, and the explosion-proof blanket is embedded or half-embedded with a layer near the cable joint for collecting the cable joint A temperature thermistor layer, the thermistor layer is evenly distributed on the detection working surface of the explosion-proof blanket near the cable joint.

[0053] Installation method: Combined with the structure shown in the attached draw...

Embodiment 3

[0056] Combined with the manual Figure 7-10 Shown is a passive cable joint temperature detector based on a magnetic induction structure. This embodiment is an improved technical solution of the embodiment. In order to further improve the safety of the explosion-proof blanket described in this application, the explosion-proof blanket is selected from high temperature resistant soft It is made of high-quality composite materials, which is convenient for installation and has good deformation ability. It is preferable to use polyethylene series flame-retardant materials or fluororubber. The thermistor layer is completely embedded in the explosion-proof blanket, and a first explosion-proof layer is provided between the thermistor layer and the detection working surface. The first explosion-proof layer is made of ceramic particles, quartz particles or metal particles. One or more high temperature resistant soft composite materials.

[0057] A second explosion-proof layer is provid...

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PUM

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Abstract

The invention discloses a passive cable joint temperature detector based on a magnetic induction structure. The passive cable joint temperature detector comprises an explosion-proof blanket and an electric appliance box, wherein the explosion-proof blanket is installed on a cable joint in a wrapping mode, and the electric appliance box is used for processing and sending temperature information collected by the explosion-proof blanket; the explosion-proof blanket is internally provided with a temperature acquisition unit used for acquiring the temperature of the cable joint and a power supply unit used for generating induction current through alternating current in a detected cable to serve as a power supply of the electric appliance box; and the power supply unit is of one or more electromagnetic induction coil structures which are installed in the axial direction or the circumferential direction of the cable. According to the passive cable joint temperature detector, electromagnetic induction current serves as the power supply unit, maintenance-free detection is achieved, and the problems that an existing built-in battery is short in service life and an indirect monitoring blind area is large and inaccurate are solved.

Description

technical field [0001] The invention relates to the field of temperature detection devices for cable joints, in particular to a temperature detection device for buried high-voltage cable joints, and in particular to a passive cable joint temperature detector based on a magnetic induction structure. Background technique [0002] During the safe operation of the power system, the fault of the cable intermediate joint cannot be predicted in advance. Only when the fault occurs and the substation line trips, can it be judged by searching step by step. In addition, indirect faults in the cables cause cable burning and short-circuit tripping in the same channel or in the same cable well, causing the scope of faults to expand. After a fault occurs, it is necessary to find it with a cable fault tester. It takes a long time to judge and find the fault point, which leads to a long time to deal with the accident and affects the safe and stable operation of the power grid. [0003] Once...

Claims

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Application Information

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IPC IPC(8): G01K13/00G01K7/22H02J50/10
CPCG01K7/223G01K13/00H02J50/10
Inventor 黄逍遥毛佳杰李博琛李欣竺海波李晨辉劳锦洲韩汇文
Owner NINGBO TRANSMISSION & DISTRIBUTION CONSTR