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Device for testing insulation characteristics of low temperature insulation material based on conductive cooling

A technology of conduction cooling and low-temperature insulation, which is applied in the direction of test ship construction, test dielectric strength, etc.

Pending Publication Date: 2019-05-21
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a device for testing the insulation properties of low-temperature insulating materials based on conduction cooling to solve the problem of how to measure the insulation properties of low-temperature insulating materials based on conduction cooling conditions

Method used

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  • Device for testing insulation characteristics of low temperature insulation material based on conductive cooling
  • Device for testing insulation characteristics of low temperature insulation material based on conductive cooling
  • Device for testing insulation characteristics of low temperature insulation material based on conductive cooling

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Embodiment 1

[0045] figure 2 It is a structural schematic diagram of a device for testing the insulation properties of insulating materials using disk-shaped electrodes according to an embodiment of the present invention. Such as figure 2 As shown, the device for testing the insulation properties of insulating materials using disk-structured electrodes includes: vacuum low temperature test chamber 1, molecular pump 2, refrigerator 3, cold head 4, insulating cooling guide 5, high voltage generator 6, high voltage lead wire 7 , High-voltage bushing 8, high-voltage electrode 9, grounding lead 10 and grounding electrode 11. Among them, the high-voltage electrode 9, the ground electrode 11 and the insulating cooling member 5 are located inside the vacuum low-temperature test chamber; the vacuum low-temperature test chamber 1 is evacuated by the molecular pump 2; the cold generated by the refrigerator 3 is passed through the cold head 4 to the ground electrode 11 for cooling; the high voltag...

Embodiment 2

[0049] In the embodiment of the present invention, only the structure of the high-voltage electrode and the ground electrode is different from that in Embodiment 1, and other components are the same.

[0050] Figure 4 It is a schematic diagram of a ring-shaped electrode according to an embodiment of the present invention. Such as Figure 4 As shown, the high-voltage electrode adopts a ring structure, the ground electrode adopts a rod or ring structure and is connected to an insulating cooling member (cooling mechanism), the high-voltage electrode is located outside the ground electrode, and the test sample is located between the high-voltage electrode and the ground electrode. The test sample is cooled by conduction of the ground electrode; the whole device is used to test the surface electrical characteristics, breakdown withstand voltage characteristics and surface flashover characteristics of sheet or film samples. There are one or more high-voltage electrodes. Specific...

Embodiment 3

[0052] In the embodiment of the present invention, only the structure of the high-voltage electrode and the ground electrode is different from that in Embodiment 1, and other components are the same.

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Abstract

The invention discloses a device for testing insulation characteristics of a low temperature insulation material based on conductive cooling, which comprises a vacuum low temperature test box, a highvoltage generator and a refrigerator, wherein an insulation cold conductive piece, a high voltage electrode, a grounding electrode and a test sample are arranged in the vacuum low temperature test box; the test sample is located between the high voltage electrode and the grounding electrode and is subjected to conductive cooling by the grounding electrode; the insulation cold conductive piece is connected with the refrigerator for preventing discharge current from flowing through the refrigerator and performing conductive cooling; the high-voltage generator is used for generating high voltageto be introduced to the high voltage electrode; and the refrigerator is connected with the grounding electrode through the insulation cold conductive piece for refrigeration and uses the grounding electrode for conductive cooling. The device of the invention can effectively solve the testing problems of electrical characteristics, breakdown voltage resistance characteristics and surface flashovercharacteristics of sheet or thin film low temperature insulation materials under conductive cooling conditions, and key technology supports are provided for the design of the low temperature insulation structure of a conductive cooling energy pipeline with a conductive cooling superconducting energy storage magnet, power transmission and low temperature fuel conveying integrated.

Description

technical field [0001] The invention relates to the technical field of measuring insulation properties of low-temperature insulating materials, and more particularly, relates to a device for testing the insulation properties of low-temperature insulating materials based on conduction cooling. Background technique [0002] The insulation characteristics of low-temperature insulating materials generally include electrical characteristics such as insulation resistance and resistivity, dielectric constant and dielectric loss, as well as breakdown voltage and surface flashover characteristics. The working environment of low-temperature insulating materials is 77K and below. There are two main cooling methods: liquid nitrogen, liquid helium and other refrigerant immersion or conduction cooling in a vacuum environment. The latter occupies a small area, is simple and easy to operate, and can adjust the operating temperature of superconducting equipment according to needs, and is bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/16
Inventor 李振明邱清泉靖立伟刘伟宋乃浩张健霖许熙张国民丘明
Owner CHINA ELECTRIC POWER RES INST
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