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Novel method and equipment for breaking vacuum of vapor phase drying chamber

A drying tank and air-breaking technology, applied in electrical components, inductance/transformer/magnet manufacturing, circuits, etc., can solve the problems of affecting insulation performance, affecting the quality of charged gas, failing to effectively remove moisture, etc., and achieving air-breaking speed. Faster, shorter time effects

Active Publication Date: 2013-03-20
TBEA HENGYANG TRANSFORMERS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The moisture in the air filled in the drying tank cannot be effectively removed, so that the dry insulating parts of the body at the end of drying will absorb moisture for the second time, thereby affecting its insulation performance
[0006] 2. The air breaking time of the atmospheric breaking method is longer (about 40 minutes), which is equivalent to prolonging the time of breaking the insulating parts of the body and increasing the risk of secondary moisture absorption of the insulating parts, especially for 1000kV UHV product or rheological product impact is greater
[0007] 3. After the air filter is repeatedly used, it will prolong the emptying time of the drying tank due to its clogging
[0008] 4. Since the air is filled into the drying tank, the local air quality (humidity, clean) at that time seriously affects the quality of the gas filled

Method used

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  • Novel method and equipment for breaking vacuum of vapor phase drying chamber

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Embodiment Construction

[0032] see figure 1 , the method for breaking the air of the vapor phase drying tank of the present invention, its specific steps are: before breaking the air, start the air compressor 4 in advance, open the dryer inlet valve 7, open the dryer 10, and the compressed air output by the air compressor passes through the dryer The intake valve 7, the first and second front compressed air filters 8, 9 enter the dryer for drying; the dry compressed air output by the dryer is filtered by the rear compressed air filter 11 again, and then adjusted to the low pressure side by the pressure reducing valve 14 The pressure indication is 1 bar; when venting, first open the venting valve 2 of the drying pot connected to the drying pot 1, and then open the regulating valve 15 connected to the venting valve 2 and the pressure reducing valve of the drying pot at both ends to perform venting ; The pressure transmitter 16 that is connected with the drying tank 1 continuously detects the pressure i...

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Abstract

The invention discloses a novel method and equipment for breaking the vacuum of a vapor phase drying chamber. The method comprises the following steps of: before vacuum breaking, starting an air compressor in advance, opening an air inlet valve of a drying machine and starting the drying machine, wherein compressed air output by the drying machine is adjusted by using a reducing valve until the pressure of a low-pressure side is 1 bar; during vacuum breaking, opening a vacuum breaking valve of the drying chamber in advance and opening an adjusting valve to break vacuum; continuously detecting the pressure in the chamber by using a pressure transmitter connected with the drying chamber, closing the adjusting valve through a process controller by using the pressure transmitter when the pressure in the drying chamber is up to one standard atmospheric pressure, and ending vacuum breaking; and keeping an atmosphere vacuum breaking device serving as an auxiliary vacuum breaking device. By adopting the method and equipment, moisture absorption of an insulating part of the transformer can be effectively avoided or reduced in the vacuum breaking process, the vacuum breaking speed is high, the time is constant, the influence of external air is avoided, and the insulating performance and quality of the insulating part of the transformer are ensured.

Description

technical field [0001] The invention belongs to the field of transformer production and manufacturing, and specifically relates to vapor-phase drying of insulating parts of transformer bodies, a treatment method and equipment after drying of transformer bodies, and is especially suitable for drying after drying of 1000kV ultra-high voltage products and converter bodies. Can emptying method and equipment. Background technique [0002] After the transformer body is assembled, there will be 4% to 8% moisture in the insulating parts of the body even in the factory environment of constant temperature and humidity. It is required to improve the reliability of the transformer so that it has good working performance and long service life. Only through drying treatment can the moisture content of the insulating material be reduced to 0.5% to 0.1%. [0003] Prior to this, in order to ensure the dry quality of transformer body insulation parts, transformer manufacturers at home and ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/00
Inventor 刘小丹尹红亮孟珍政张海涛
Owner TBEA HENGYANG TRANSFORMERS
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