CN102136360A - Novel method and equipment for breaking vacuum of vapor phase drying chamber - Google Patents
Novel method and equipment for breaking vacuum of vapor phase drying chamber Download PDFInfo
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- CN102136360A CN102136360A CN 201010101797 CN201010101797A CN102136360A CN 102136360 A CN102136360 A CN 102136360A CN 201010101797 CN201010101797 CN 201010101797 CN 201010101797 A CN201010101797 A CN 201010101797A CN 102136360 A CN102136360 A CN 102136360A
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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
The invention belongs to transformer production and make the field, be specifically related to the dried processing method of vapour phase drying, transformer body and the equipment of transformer body insulating part, be particularly useful for the broken empty method and apparatus of 1000kV level ultra high voltage product and the dried drying chamber of change of current sell of one's property product device body.
Background technology
After the transformer body assembling, even in the power house environment of constant temperature and humidity, also can contain 4%～8% moisture in the device body insulating part, for giving full play to the superior function of oil immersion papery insulation dielectric, thereby reach the insulating requirements of transformer, improve the reliability of transformer, make it to have good working performance and long useful life, have only, make the water content of insulating material reduce to 0.5%～0.1% by dried.
Before this, for guaranteeing the dry mass of transformer body insulating part, transformer production both domestic and external producer adopts the drying means of kerosene vapour phase drying usually, and will surpass, the water content in the ultra high voltage product device body insulating part reduces to below 0.3% as dry termination condition, abolishes vacuum in the drying chamber with air afterwards.And in order to prevent that solid particle big in the air (particularly metallic particles) from entering in the drying chamber by broken vacant duct, current most of producer all adopts the mode that air cleaner is installed on the air valve door of drying chamber to carry out dust removal process.When breaking sky, directly open the drying chamber air valve, air will pass through air cleaner, the drying chamber air valve enters drying chamber.
There is following shortcoming in above-mentioned broken short side method:
1, the airborne moisture that charges in the drying chamber of failing effectively to remove, and make the device body insulating part secondary moisture absorption of the drying that is in dry latter stage, and then influence its insulation property.
2, the broken empty time of the broken empty method of atmosphere is grown (about 40min), and this has been equivalent to prolong the sudden and violent empty time of device body insulating part, has strengthened the risk of the insulating part secondary moisture absorption, and especially the influence to 1000kV level ultra high voltage product or change of current sell of one's property product is bigger.
3, after air cleaner is repeatedly used, can prolong the broken empty time of drying chamber because of its obstruction.
4,,, the air quality of there and then (humidity, cleaning) charges into gaseous mass so having a strong impact on owing to the air that is that charges in the drying chamber.
Summary of the invention:
Technical problem to be solved by this invention is: the problem that exists at above-mentioned prior art, and provide a kind of new vapour phase drying chamber break empty method and apparatus, and avoid or reduce device body insulating part moisture absorption in breaking null process, broken air speed degree is fast, time is constant, not influenced by extraneous air, steady quality.
The technical solution used in the present invention is:
A kind of new vapour phase drying chamber breaks the short side method, and its concrete steps are:
1), broken unprecedented, start air compressor machine in advance, open the drying machine intake valve, open drying machine, compressed air drying machine intake valve, the preceding compressed-air filter of air compressor machine output enter drying machine and carry out drying;
2), the dry compressed air of drying machine output is once more through back compressed-air filter filtration, be adjusted to low-pressure lateral pressure through pressure-reducing valve then and represent that number is 1bar;
3), when broken empty, open earlier and dry tank connected drying chamber air valve, open the adjuster valve that two ends are connected with pressure-reducing valve with the drying chamber air valve respectively again, break sky;
4), with dry tank connected pressure transmitter continuous detecting drying chamber in pressure, when the pressure in to be dried jar reached 1 atmospheric pressure, pressure transmitter was given shutdown signal of adjuster valve by process controller, closes adjuster valve, broken empty the end;
5), keep the broken empty device of atmosphere, as auxiliary broken empty device: promptly air intake, air cleaner, atmosphere air valve, drying chamber air valve connect successively.
A kind of new vapour phase drying chamber breaks null device, comprises the air compressor machine, compressed air reservoir, drying machine intake valve, the first preceding compressed-air filter, the second preceding compressed-air filter, drying machine, back compressed-air filter, surge tank, pressure-reducing valve, adjuster valve, drying chamber air valve, the drying chamber that connect successively; Drying chamber is connected with pressure transmitter, pressure transmitter output connection procedure controller, and process controller output connects and the regulating and controlling valve; The drying chamber air valve also is connected with the atmosphere air valve, and atmosphere air valve input connects air cleaner.
Outstanding feature of the present invention is as follows:
1, adopt clean (being removed to the particle of 0.01 μ m), dry compressed air (dew point≤-70 ℃) can avoid or reduce device body insulating part moisture absorption in broken null process to the broken sky of drying chamber.
2, broken air speed degree is fast, and the broken empty time shortens over half at least than in the past, has shortened dry device body greatly and has been exposed to time in the humid air.
3, broken pneumatics power remains at 1bar (on the atmospheric pressure atmospheric pressure of superposition) again, and the broken empty time is constant.
4, the method can not be subjected to the influence of extraneous air and influence brokenly the air body quality.
Description of drawings:
Fig. 1 is principle of the invention figure
The accompanying drawing marking explanation:
1---drying chamber 2---drying chamber air valve 3---air cleaner
4---air compressor machine 5---compressed air reservoir 6---safety valves
Compressed-air filter before 7---drying machine intake valve 8---first
9---compressed-air filter 10 before second---drying machine
11---back compressed-air filter 12---surge tank safety valve 13---surge tanks
14---pressure-reducing valve 15---adjuster valve 16---pressure transmitters
17---process controller 18---atmosphere air valve.
Embodiment:
Referring to Fig. 1, vapour phase drying chamber of the present invention breaks the short side method, its concrete steps are: broken unprecedented, start air compressor machine 4 in advance, open drying machine intake valve 7, open drying machine 10, compressed air drying machine intake valve 7, first and second preceding compressed-air filter 8,9 of air compressor machine output enter drying machine and carry out drying; The dry compressed air of drying machine output is adjusted to low-pressure lateral pressure through pressure-reducing valve 14 then and represents that number is 1bar once more through 11 filtration of back compressed-air filter; When broken empty, open the drying chamber air valve 2 that is connected with drying chamber 1 earlier, open the adjuster valve 15 that two ends are connected with pressure-reducing valve with drying chamber air valve 2 respectively again, break sky; Pressure in the pressure transmitter 16 continuous detecting drying chambers that are connected with drying chamber 1, when to be dried jar of interior pressure reached 1 atmospheric pressure, pressure transmitter 16 was given shutdown signal of adjuster valve by process controller 17, closes adjuster valve, broken empty end; Keep the broken empty device of atmosphere, as assisting broken empty device: promptly air intake, air cleaner 3, atmosphere air valve 18, drying chamber air valve 2 connect successively.
Vapour phase drying chamber of the present invention breaks null device, comprises the air compressor machine 4, compressed air reservoir 5, drying machine intake valve 7, first preceding compressed-air filter 8, the second preceding compressed-air filter 9, drying machine 10, back compressed-air filter 11, surge tank 13, pressure-reducing valve 14, adjuster valve 15, drying chamber air valve 2, the drying chamber 1 that connect successively; Drying chamber 1 is connected with pressure transmitter 16, pressure transmitter 16 output connection procedure controllers 17, and process controller 17 outputs connect and the regulating and controlling valve; The drying chamber air valve also is connected with atmosphere air valve 18, and atmosphere air valve 18 inputs connect air cleaner 3.
Compare with conventional art, the present invention adopts the compressed air through purification, dried drying chamber to be broken empty.Broken unprecedented, start air compressor machine 4 in advance, open drying machine intake valve 7, open drying machine 10, regulate pressure-reducing valve 14 and make its low-pressure lateral pressure represent that number is 1bar; When breaking sky, open drying chamber air valve 2 earlier, open adjuster valve 15 again; Pressure in the broken null process in the pressure transmitter 16 continuous detecting drying chambers 1, when to be dried jar 1 interior pressure reached 1 atmospheric pressure (with the outside atmosphere equipressure), process controller 17 cut out adjuster valve 15 for 15 1 shutdown signals of adjuster valve, broken empty the end.Simultaneously, should broken short side method keep the broken empty device of atmosphere, make it as auxiliary broken empty device, if aforementioned broken empty device occurs can opening atmosphere air valve 18 when unusual, open drying chamber air valve 2, air then enters drying chamber 1 through air cleaner 3, atmosphere air valve 18, drying chamber air valve 2, and is empty to guarantee that drying chamber can normally break.
Claims (2)
1. a new vapour phase drying chamber breaks the short side method, it is characterized in that concrete steps are:
1) broken unprecedented, start air compressor machine in advance, open the drying machine intake valve, open drying machine, compressed air drying machine intake valve, the preceding compressed-air filter of air compressor machine output enter drying machine and carry out drying;
2) the dry compressed air of drying machine output represents that through pressure-reducing valve to low-pressure lateral pressure number is 1bar then once more through back compressed-air filter filtration;
When 3) breaking sky, open earlier and dry tank connected drying chamber air valve, open the adjuster valve that two ends are connected with drying chamber air valve and adjusting pressure-reducing valve respectively again, break empty;
4) with the interior pressure of dry tank connected pressure transmitter continuous detecting drying chamber, when to be dried jar of interior pressure reached 1 atmospheric pressure, pressure transmitter was given shutdown signal of adjuster valve by process controller, closes adjuster valve, and broken sky finishes;
5) keep the broken empty device of atmosphere, as assisting broken empty device: promptly air intake, air cleaner, atmosphere air valve, drying chamber air valve connect successively.
2. the broken null device of new vapour phase drying chamber is characterized in that comprising the air compressor machine, compressed air reservoir, drying machine intake valve, the first preceding compressed-air filter, the second preceding compressed-air filter, drying machine, back compressed-air filter, surge tank, pressure-reducing valve, adjuster valve, drying chamber air valve, the drying chamber that connect successively; Drying chamber is connected with pressure transmitter, pressure transmitter output connection procedure controller, and process controller output connects and the regulating and controlling valve; The drying chamber air valve also is connected with the atmosphere air valve, and the atmosphere air valve is gone into end and connected air cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010101797 CN102136360B (en) | 2010-01-27 | 2010-01-27 | Novel method and equipment for breaking vacuum of vapor phase drying chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010101797 CN102136360B (en) | 2010-01-27 | 2010-01-27 | Novel method and equipment for breaking vacuum of vapor phase drying chamber |
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| Publication Number | Publication Date |
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| CN102136360A true CN102136360A (en) | 2011-07-27 |
| CN102136360B CN102136360B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010101797 Active CN102136360B (en) | 2010-01-27 | 2010-01-27 | Novel method and equipment for breaking vacuum of vapor phase drying chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426906A (en) * | 2011-12-21 | 2012-04-25 | 山东电力设备有限公司 | Method and device for charging dry air into transformer at negative pressure |
| CN106098317A (en) * | 2016-07-12 | 2016-11-09 | 无锡市华东电力设备有限公司 | Charging dry air into transformer at negative pressure method and device thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2581038Y (en) * | 2002-11-29 | 2003-10-22 | 乔保振 | Movable double-evaporator vapour-phase drying equipment |
| CN101368769A (en) * | 2007-08-13 | 2009-02-18 | 南通汉康冷冻设备有限公司 | Vacuum quick cooling machine without secondary pollution |
-
2010
- 2010-01-27 CN CN 201010101797 patent/CN102136360B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426906A (en) * | 2011-12-21 | 2012-04-25 | 山东电力设备有限公司 | Method and device for charging dry air into transformer at negative pressure |
| CN106098317A (en) * | 2016-07-12 | 2016-11-09 | 无锡市华东电力设备有限公司 | Charging dry air into transformer at negative pressure method and device thereof |
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| Publication number | Publication date |
|---|---|
| CN102136360B (en) | 2013-03-20 |
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