Machining method for high-voltage capacitive dry-type bushing

A dry-type bushing and high-voltage capacitor technology, applied in the direction of circuits, electrical components, insulators, etc., can solve the problems of high production cost, bushing failure, and many layers of capacitor electrodes, and achieve small structural size and radial field strength. The effect of uniform and excellent electrical performance

Active Publication Date: 2014-12-10
西安神电高压电器有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The production process requires a lot of crepe paper, all of which need to be made of wood, which does not conform to the current environmental protection trend and trend;
[0005] 2. The vacuum drying and insulation treatment cycle of crepe paper fiber is very long, and the production cost is high;
[0006] 3. It is difficult for the epoxy resin in the capillary tube of crepe paper fiber to be completely saturated. During the later production, processing, transportation and operation, the exposed epoxy part needs to be sealed and protected by a special container, otherwise the paper fiber will be reabsorbed into the air. If there is too much moisture, the dielectric loss and partial discharge of the bushing will increase, and long-term operation will lead to bushing failure and collapse, which will pose a major hidden danger to the whole equipment;
[0007] 4. Capacitor plates need to be alternately arranged between crepe papers. It is difficult to control the degree of tightness of crepe paper rolls, which has an important impact on the accuracy of capacitor electrode layout

Method used

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  • Machining method for high-voltage capacitive dry-type bushing

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Embodiment Construction

[0034] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0035] The processing method of the high-voltage capacitive dry bushing comprises the following steps:

[0036] 1] core rolling

[0037] 1.1] Determine the diameter of the conductive rod according to the current-carrying method and sandblast the surface of the conductive rod and coat the coupling agent; for example: determine the conductive rod with a current carrying capacity of 1250 amperes, its diameter is 65mm, and the current-carrying method is direct current-carrying. The compressed air sandblasting process is used to perform sandblasting on the surface of the conductive rod. The sand can be 80-100 mesh sand grains made of corundum. After the sandblasting is completed, it needs to be cleaned and dried. Coupling agent twice, the coupling agent can choose KH550, KH560, the performance of KH550 is to improve the bonding activity of epoxy resin and a...

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Abstract

The invention provides a machining method for a high-voltage capacitive dry-type bushing. According to the method, Radial field intensity is the most uniform when partial discharge margins are equal, the method is different from a method for an oil-filled bushing with average field intensity, and the bushing machined by the method has a smaller structural size and better electrical performance as compared with an existing bushing. The machining method for the high-voltage capacitive dry-type bushing mainly includes the steps of core rolling, vacuum gum dipping and forming.

Description

technical field [0001] The invention relates to a high-voltage bushing used in the power transmission and transformation industry, in particular to a processing method for a high-voltage capacitive dry bushing. Background technique [0002] At present, the dry high-voltage bushings used in the power transmission and transformation industry mainly include glue-impregnated crepe paper type and glass fiber winding type, but the above two methods have the following problems: [0003] The current problems of glue impregnated crepe paper type: [0004] 1. The production process requires a lot of crepe paper, all of which need to be made of wood, which does not conform to the current environmental protection trend and trend; [0005] 2. The vacuum drying and insulation treatment cycle of crepe paper fiber is very long, and the production cost is high; [0006] 3. It is difficult for the epoxy resin in the capillary tube of crepe paper fiber to be completely saturated. During the ...

Claims

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Application Information

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IPC IPC(8): H01B19/00
Inventor 叶霖严锋
Owner 西安神电高压电器有限公司
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