Processing method of dry-type high-voltage bushing with built-in voltage-sharing ball, and high-voltage bushing

A technology of high-voltage bushing and processing method, which is applied in the parts of transformer/inductor, coil/winding/connection, insulator, etc. of transformer/inductor, can solve the problems of poor bolt connection, inconvenient test, and high surface field strength, To achieve the effect of shortening the test time, reducing the strength, and reducing the surface field strength

Pending Publication Date: 2021-12-28
GUIYANG BUREAU OF CHINA SOUTHERN POWER GRID CO LTD EHV TRANSMISSION CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The pressure equalizing balls of conventional transformer bushings are all fixed on the metal parts at the end of the bushing by bolts or threads. There is a risk of high surface field strength and poor bolt connection under long-term operation and vibration, resulting in transformer accidents; at the same time, each test , all need to be disassembled, and the test is inconvenient

Method used

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  • Processing method of dry-type high-voltage bushing with built-in voltage-sharing ball, and high-voltage bushing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as figure 1 Shown: a processing method of a pressure equalizing ball built-in dry-type high-voltage bushing, including the following steps:

[0026] Step 1: Tighten the built-in pressure equalizing ball 2 on one end of the rolled aluminum tube 1;

[0027] Step 2: Wrap the crepe paper on the surface of the rolled aluminum tube 1 and the built-in pressure equalizing ball 2, and wind it to the required thickness to form a rolled core;

[0028] Step 3: Put the rolled core into the drying device for vacuum drying;

[0029] Step 4: Place the dried rolled core into the pouring tooling cylinder, fill the pouring tooling tube with pouring agent under vacuum conditions, pour the rolled core, and then heat and solidify;

[0030] Step 5: Demoulding the coiled core after heating and curing to obtain the dry capacitor core 3;

[0031] Step 6: Machining the dry capacitor core 3 after demoulding as required;

[0032] Step 7: Assembling the flange 4, the hollow composi...

Embodiment 2

[0039] Embodiment 2: as figure 1 Shown: a processing method of a pressure equalizing ball built-in dry-type high-voltage bushing, including the following steps:

[0040] Step 1: Tighten the built-in pressure equalizing ball 2 on one end of the rolled aluminum tube 1;

[0041] Step 2: Wrap the crepe paper on the surface of the rolled aluminum tube 1 and the built-in pressure equalizing ball 2, and wind it to the required thickness to form a rolled core;

[0042] Step 3: Put the rolled core into the drying device for vacuum drying;

[0043] Step 4: Place the dried rolled core into the pouring tooling cylinder, fill the pouring tooling tube with pouring agent under vacuum conditions, pour the rolled core, and then heat and solidify;

[0044] Step 5: Demoulding the coiled core after heating and curing to obtain the dry capacitor core 3;

[0045] Step 6: Machining the dry capacitor core 3 after demoulding as required;

[0046] Step 7: Assembling the flange 4, the hollow composi...

Embodiment 3

[0053] Embodiment 3: as figure 1 Shown: a processing method of a pressure equalizing ball built-in dry-type high-voltage bushing, including the following steps:

[0054] Step 1: Tighten the built-in pressure equalizing ball 2 on one end of the rolled aluminum tube 1;

[0055] Step 2: Wrap the crepe paper on the surface of the rolled aluminum tube 1 and the built-in pressure equalizing ball 2, and wind it to the required thickness to form a rolled core;

[0056] Step 3: Put the rolled core into the drying device for vacuum drying;

[0057] Step 4: Place the dried rolled core into the pouring tooling cylinder, fill the pouring tooling tube with pouring agent under vacuum conditions, pour the rolled core, and then heat and solidify;

[0058] Step 5: Demoulding the coiled core after heating and curing to obtain the dry capacitor core 3;

[0059] Step 6: Machining the dry capacitor core 3 after demoulding as required;

[0060] Step 7: Assembling the flange 4, the hollow composi...

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Abstract

The invention discloses a processing method of a dry-type high-voltage bushing with a built-in voltage-sharing ball. The processing method comprises the following steps: firstly, screwing the built-in voltage-sharing ball outside a tube body at one end of a rolled aluminum tube; then winding crepe paper on the surfaces of the rolled aluminum tube and the built-in voltage-sharing ball to a required thickness to form a rolled core; placing the rolled core in a drying device, performing vacuum drying; then placing the dried rolled core in a pouring tool cylinder, adding a pouring agent into the pouring tool cylinder under the vacuum condition to pour the rolled core, and then heating and curing the rolled core; demolding the heated and cured rolled core to obtain a dry-type capacitor core, and machining the dry-type capacitor core according to requirements; and finally, assembling parts such as a flange and a hollow composite insulating sleeve on the dry capacitor core to obtain the dry high-voltage bushing with the built-in voltage-sharing ball. The high-voltage bushing manufactured by the processing method provided by the invention can effectively solve the problem of looseness of the voltage-sharing ball, and can improve the operation reliability.

Description

technical field [0001] The invention relates to a processing method of a dry-type high-voltage bushing with a built-in pressure equalizing ball and the high-voltage bushing, belonging to the field of electric high-voltage bushings. Background technique [0002] The pressure equalizing balls of conventional transformer bushings are all fixed on the metal parts at the end of the bushing by bolts or threads. There is a risk of high surface field strength and poor bolt connection under long-term operation and vibration, resulting in transformer accidents; at the same time, each test , all need to be disassembled, and the test is inconvenient. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the present invention provides a processing method for a dry-type high-voltage bushing with a built-in pressure equalizing ball. The dry-type high-voltage bushing with a built-in pressure equalizing ball can effectively solve the problem of Loose prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/02H01B19/00H01B17/42H01B17/58H01F27/32
CPCH01B19/02H01B19/00H01B17/42H01B17/583H01F27/324
Inventor 吕刚吕金壮孙勇
Owner GUIYANG BUREAU OF CHINA SOUTHERN POWER GRID CO LTD EHV TRANSMISSION CO
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