Insulator and preparation method thereof

A technology of insulators and substrates, which is applied in the field of insulating devices and its preparation, can solve the problems of low surface breakdown voltage resistance of insulators, difficulty in meeting the vacuum insulation requirements of high-voltage devices, and poor reliability, so as to reduce the unevenness of the surface electric field and suppress flashover. Network development, the effect of buffering the difference in thermal expansion coefficient

Active Publication Date: 2019-08-16
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an insulator and its preparation method to solve the problems of low surface breakdown resistance, poor reliability and difficulty in meeting the vacuum insulation requirements of high-voltage devices in existing insulators

Method used

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  • Insulator and preparation method thereof
  • Insulator and preparation method thereof
  • Insulator and preparation method thereof

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preparation example Construction

[0037] The preparation method of the above-mentioned insulator is as follows:

[0038] Step 1, processing to obtain an insulator base 1 . The size of the insulator base 1 is preset according to the usage conditions.

[0039] Step 2, machining a plurality of annular grooves 3 on the surface of the insulator base 1 .

[0040] Step 3, prepare the elastic conductive ring 2 adapted to it according to the size of the annular groove 3, set the elastic conductive ring 2 in the annular groove 3, wherein the inner surface perimeter of the elastic conductive ring 2 in a natural state is larger than the circumference of the annular groove 2%-10% in size. The size of the annular groove 3 here includes the depth, width and circumference of the annular groove 3 , and the size of the elastic conductive ring 2 is prepared to match the annular groove 3 .

[0041] In step 4, the insulator base 1 covered with the elastic conductive ring 2 is ultrasonically treated, cleaned and dried to obtain ...

Embodiment 1

[0045] Polymethyl methacrylate (PMMA) is used as the material of the insulator base 1, and it is processed into a cylindrical insulator of Ф30.0mm×10mm by mechanical processing. After cleaning, it is installed on the rotary table of the carbon dioxide laser. According to the laser parameters, a plurality of annular grooves with an opening width of 0.2 mm, a groove depth of 0.4 mm, and a groove spacing of 0.5 mm are etched on the surface of the insulator substrate 1 . The prepared elastic conductive rings 2 with an inner diameter of 28 mm, a cross-sectional diameter of 0.2 mm, and an electrical conductivity of 0.1 S / cm are sleeved in the annular groove 3 one by one. Finally, the prepared sample is placed in deionized water, ultrasonically oscillated for 1 hour, and the elastic conductive ring 2 is driven to vibrate by ultrasonic waves, releasing the force imbalance caused by uneven local deformation, and finally the elastic conductive ring 2 is lower than the surface of the insu...

Embodiment 2

[0047] Polymethyl methacrylate (PMMA) is used as the material of the insulator base 1, and it is processed into a cylindrical insulator of Ф30.0mm×10mm by mechanical processing. After cleaning, it is installed on the rotary table of the carbon dioxide laser. According to the laser parameters, a plurality of annular grooves with an opening width of 0.4 mm, a groove depth of 0.3 mm, and a groove spacing of 0.5 mm are etched on the surface of the insulator base 1 . The prepared elastic conductive rings 2 with an inner diameter of 28 mm, a cross-sectional diameter of 0.4 mm, and a conductivity of 1 S / cm are set in the annular groove 3 one by one. Finally, the prepared sample is placed in deionized water, ultrasonically oscillated for 1 hour, and the elastic conductive ring 2 is driven to vibrate by ultrasonic waves, releasing the force imbalance caused by uneven local deformation, and finally the elastic conductive ring 2 is higher than the surface of the insulator base 1 The insu...

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Abstract

The invention belongs to an insulating device and a preparation method thereof and particularly relates to an insulator and a preparation method thereof. The problem that an existing insulator has lowsurface breakdown voltage, poor reliability and difficulty in meeting the vacuum insulation requirements of a high-voltage device is solved. The insulator includes an insulator base and elastic conductive rings. The outer surface of the insulator base is provided with a plurality of mutually parallel annular grooves. The adjacent annular grooves have the same slot pitch, and the elastic conductive rings are sleeved in the annular grooves. By sleeving the elastic conductive rings in the annular grooves, while the difficulty and cost of the preparation process of a high-gradient insulator are significantly reduced, the stability and reliability are improved. Since the invention does not involve the processing process of post-machining and grinding, unstable factors such as metal chips and burrs in an insulation layer after the processing of a traditional high-gradient insulator are avoided, the electric field distortion caused by the metal chips is avoided, and the consistency of the performance of the insulator is ensured while the breakdown voltage is raised.

Description

technical field [0001] The invention belongs to an insulating device and a preparation method thereof, in particular to an insulator and a preparation method thereof. Background technique [0002] According to Flashover of insulators in vacuum: the last twenty years published in "IEEE Transactions on Dielectrics & Electrical Insulation", in the field of vacuum high-voltage insulation, the interface between the vacuum and the insulator is a weak zone for withstand voltage, and surface breakdown is prone to occur under high voltage , the breakdown voltage is generally much lower than the bulk breakdown voltage and vacuum breakdown voltage of insulating materials of the same thickness. In pulsed power systems, such as high-energy particle accelerators, Z-pinch and high-power lasers, the damage or failure of insulators often manifests as vacuum surface flashover. The occurrence of insulator vacuum surface flashover seriously restricts the withstand voltage capability of high-vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/38H01B17/42H01B19/00
CPCH01B17/38H01B17/42H01B19/00
Inventor 刘文元霍艳坤柯昌凤陈昌华孙钧郭跃文唐运生
Owner NORTHWEST INST OF NUCLEAR TECH
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