CN101064456A - Anti-explosion vacuum pressure varnished insulation apparatus and its technical method - Google Patents
Anti-explosion vacuum pressure varnished insulation apparatus and its technical method Download PDFInfo
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- CN101064456A CN101064456A CN 200710054100 CN200710054100A CN101064456A CN 101064456 A CN101064456 A CN 101064456A CN 200710054100 CN200710054100 CN 200710054100 CN 200710054100 A CN200710054100 A CN 200710054100A CN 101064456 A CN101064456 A CN 101064456A
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Abstract
The invention relates to explosion-proof vacuum pressure impregnated insulation device and its process which is used in high-tension motor winding loop impregnated insulation paint, it characterized in that: condensator connected with refrigerator is set on the vacuum tube between the impregnating vessel and vacuum set, and collecting vessel is set on bottom of the impregnating vessel, one end of the collecting vessel is connected with the impregnating vessel, the another end is connected with the paint pipelines of storing vessel via transferring valve and returning valve. Using the device and the process, the remained insulation paint and dissolvent in the impregnating vessel can be solved, when the vacuum set vacuumizes the impregnating vessel, the explosive fuel phenylethene deflocculating agent can not be sucked to the vacuum set to gel and jam, it possesses practical effects of explosion-proof, safe reliability, saving raw material.
Description
Technical field
The invention belongs to the pressure vessel technology field, especially for a kind of anti-explosion vacuum pressure varnished insulation apparatus and the process thereof of high-voltage motor winding coil impregnated insulating paint.
Background technology
The voltage that generator sends send arrangement to use by the electrical network change.And now the user in conjunction with drag greatly, powerful development need, motor directly is connected on uses on 6Kv and the above transformer thereof, can reduce the loss of circuit, also can reduce the investment once more of low-tension transformer and affiliated facility thereof simultaneously.Make 6KV and above high-voltage generator, motor large scale application thereof for this reason.Because the confidential effect of bearing high voltage and big electric current of high-tension electricity for improving the proof voltage level of high-voltage motor winding coil, adopts vacuum pressure impregnation equipment that its winding coil is carried out insulation processing usually.In the insulation impregnating process, at first start the vacuum unit impregnating vessel is vacuumized, the lower-molecular substance (as moisture content, styrene, dimethylbenzene etc.) of coil inside is extracted; By high pressure insulating varnish is pressed into coil inside then, improves coil proof voltage level.The present vacuum pressure impregnation equipment that uses, though good serviceability is arranged, but when vacuumizing at every turn, can't avoid the influence of insulating varnish remaining in the impregnating vessel to vacuum degree, owing to contain in the insulating varnish and account for 30% styrene or other diluents, and styrene or other diluents all belong to flammable and explosive substance, and explosion limit scope 1-7%, self-ignition point are 460 ℃.Remaining insulating varnish more for a long time in impregnating vessel, styrene in the insulating varnish or other diluents are also just many relatively, afterwards when vacuumizing, the flammable explosive gas that enters in the vacuum unit is just many, especially styrene also has self-crosslinking and becomes the characteristics of solid matter, styrene or other diluents in the insulating varnish are pumped in the vacuum unit, in case in the vacuum unit, solidify, be prone to vacuum pump is blocked, cause the not smooth and explosion caused accident of gas circuit, therefore have great unsafe hidden danger.The vacuum pressure impregnation of prior art, owing to fundamentally do not solve remaining insulating varnish and solvent in the impregnating vessel, the high-voltage motor winding coil ubiquity dielectric loss height after causing flooding directly has influence on useful life of high-voltage motor thus.
Summary of the invention
The purpose of this invention is to provide a kind of vacuum unit of can effectively avoiding and aspirate flammable explosive gas, safe and reliable, and can reduce the remaining of the interior insulating varnish of impregnating vessel, the anti-explosion vacuum pressure varnished insulation apparatus of conservation.
Another object of the present invention provides a kind of process of anti-explosion vacuum pressure varnished insulation.
Realize that the technical scheme that purpose of the present invention is taked is: this device comprises impregnating vessel, storage paint can, vacuum unit, on the vacuum pipe between impregnating vessel and the vacuum unit, have additional the condenser that is connected with refrigerating units, and be provided with the collection paint can in the bottom of impregnating vessel, this collection paint can one end is communicated with impregnating vessel, and the other end is communicated with the transmission pipe road of storage paint can by defeated, time lacquer valve.
Described impregnating vessel intracavity bottom is provided with cone shape collection lacquer plate, and the centre of this plate has into, returns the lacquer through hole, and the slave plate center is 6～10 ° to the gradient of tank skin.
Described collection paint can is the closed container structure, and the pipeline that is communicated with between its top and the impregnating vessel is provided with the liquid collecting valve, and the bottom is communicated with the position with the transmission pipe road of storage paint can and is provided with defeated, time lacquer valve.
Described condenser is a tank body that seals up and down, is provided with circulating cooling pipe in the tank body, and the inlet channel of cooling water pipe and outlet conduit are communicated with refrigerating units respectively, and discharging tube and tapping valve are equipped with in the tank body bottom.
Processing step of the present invention is as follows:
Condensation: impregnated workpiece is put into impregnating vessel, tighten cover, before the vacuum unit starting, start refrigerating units earlier, the refrigerating units temperature is adjusted to-25 ℃, and in condenser, carry the aqueous solution of 30% ethylene glycol by the cooling pipe of refrigerating units, in the process that startup vacuum unit vacuumizes impregnating vessel, gas (gas includes styrene and other diluents) in jar is condensed into liquid by condenser earlier, and is trapped in the condenser, can regularly discharge reuse.
Vacuumize: close blowdown valve, safety valve and defeated lacquer valve, the vacuum degree of the one-level pump of vacuum unit is set to 10000Pa; The vacuum degree of two stage pump is set to 5000Pa; The vacuum degree of triplex is set to 1000Pa; Start the vacuum unit, when the vacuum degree in the impregnating vessel reached 5000Pa, two stage pump started automatically; When two stage pump was extracted into 1000Pa with the vacuum in the impregnating vessel, triplex started automatically, and vacuum degree is extracted into less than 100Pa in impregnating vessel, the vacuum compressor emergency shutdown.
The fidelity sky: behind the vacuum compressor emergency shutdown, impregnating vessel enters the empty stage of fidelity automatically, the empty 180min of fidelity;
Defeated lacquer: after the empty time of fidelity arrives, open defeated lacquer valve, under the vacuum pressure effect, the insulating varnish in the storage paint can is inhaled lacquer by transmission pipe road negative pressure in impregnating vessel;
Wet vacuum: insulating varnish is passed to the height of setting, closes defeated lacquer valve, still has certain vacuum degree in the impregnating vessel, is wet vacuum, under the effect of this kind vacuum, keeps 60～100min;
Put vacuum: open the blowdown valve on impregnating vessel top, gas-entrained, the styrene free monomer and the resin free monomer that are overflowed with bubble form in insulating varnish inside are got rid of in impregnating vessel;
Pressurization: startup adds compression pump, opens pressurizing valve, and in the nitrogen injection impregnating vessel with drying, extremely a jar internal pressure reaches 0.5～0.8Mpa;
Pressurize: when the pressure in the impregnating vessel reaches 0.5～0.8Mpa, close pressurizing valve, impregnating vessel enters packing state, pressurize 360～400min;
Put pressure: after the pressurize, open blowdown valve, the nitrogen in the impregnating vessel is got rid of, be higher than atmospheric pressure 0.1～0.2Mpa to the impregnating vessel internal pressure.
Return lacquer: open defeated, time lacquer valve, insulating varnish is pushed back in the storage paint can by the transmission pipe road by the impregnating vessel pressure inside.
Put pressure: open blowdown valve, with the overbottom pressure emptying of impregnating vessel inside, equal to jar internal pressure and atmospheric pressure.
Go out jar: open the dipping lacquer cover, workpiece is hung out.
The anti-explosion vacuum pressure varnished insulation apparatus of making according to such scheme, not only can effectively solve the residue problem of interior insulating varnish of impregnating vessel and solvent, and when the vacuum unit vacuumizes impregnating vessel, can also avoid the flammable explosive gas-styrene in the insulating varnish or other diluent are drawn into the obstruction that is cured in the vacuum unit practical function such as that this device has is explosion-proof, safe and reliable, conservation by condenser.Simultaneously, use this method impregnated insulating paint, the high-voltage motor winding coil interior media loss of manufacturing is reduced, improve the useful life of motor.
Description of drawings
Fig. 1 is the structural representation of vacuum pressure varnished insulation apparatus;
Fig. 2 is a process chart of the present invention.
Embodiment
Referring to Fig. 1, each label is among the figure: transmission pipe road 1, defeated lacquer valve 2, storage paint can 3, stirring motor 4, pressurization pneumatic operated valve 5, vacuumize pneumatic operated valve 6, vacuum pipe 7, refrigerating units 8, outlet conduit 9, inlet channel 10, condenser 11, blow-off line 12, vacuum unit 13, tapping valve 14, collection lacquer plate 15, impregnating vessel 16, collection paint can 17, defeated, return lacquer valve 18, collection lacquer valve 19, filter 20.
Anti-explosion vacuum pressure varnished insulation apparatus of the present invention is made up of impregnating vessel 16, storage paint can 3, vacuum unit 13, refrigerating units 8, condenser 11, collection paint can 17, wherein, condenser 11 is arranged on the vacuum pipe 7 between impregnating vessel 16 and the vacuum unit 13, this condenser 11 is a tank body that seals up and down, be provided with circulating cooling pipe in the tank body, the inlet channel 10 of cooling water pipe and outlet conduit 9 are communicated with refrigerating units 8 respectively, and discharging tube and tapping valve 14 are equipped with in the bottom of tank body.When 13 pairs of impregnating vessels 16 of vacuum unit vacuumize, contained styrene and other diluent volatile matter be not before entering vacuum unit 13 from impregnating vessel 16 gas bleedings, be condensed into during through condenser 11 and be liquid, by regularly opening the tapping valve 14 of condenser 11 bottoms, condensed liquid can be reused after discharging tube is discharged, can avoid styrene or other diluent volatile matter to enter vacuum unit 13 thus and the gel obstruction and the spontaneous combustion blast that cause.Be provided with collection paint can 17 in the bottom of impregnating vessel 16, this collection paint can 17 be the closed container structure, is equipped with to collect on its top and the pipeline that impregnating vessel 16 is communicated with and coats with lacquer valve 19, and the bottom is communicated with the position defeated, time lacquer valve 18 is housed with transmission pipe road 1.At impregnating vessel 16 intracavity bottoms cone shape collection lacquer plate 15 is installed, the centre of collection lacquer plate 15 has the defeated lacquer through hole that is communicated with collection paint can 17, the gradient of this plate from the center to the tank skin is set to 6～10 °, this gradient is not beneficial too big, with avoid in the jar being soaked workpiece slides on acclive collection lacquer plate 15 and pile-up in the jar centre.Impregnating vessel 16 bottoms are circular, when impregnating vessel 16 is not worked, that the long-pending insulating varnish that applies on impregnating vessel 16 bottoms and tank skin flows to naturally is defeated, return lacquer mouthful, is stored in the collection paint can 17 by collection lacquer valve 19 adfluxions of opening, and makes that remaining insulating varnish reduce to minimum in the impregnating vessel 16.When impregnating vessel 16 work, closure set lacquer valve 19.By setting up collection paint can 17, insulating varnish remaining in the impregnating vessel 16 is reduced, therefore, in the process that impregnating vessel 16 is vacuumized, the styrene gas of extracting out or other diluent are just few relatively, thereby can avoid flammable explosive gas to enter vacuum unit 13 effectively, reach explosion-proof practical function, and thoroughly eliminate hidden danger.Label 4 among the figure is stirring motors, is mainly used in the drive paddle insulating varnish in the storage paint can 3 is is evenly mixed and stirred.
In conjunction with Fig. 1, referring to Fig. 2, process of the present invention is:
Impregnated workpiece is put into impregnating vessel 16, tighten cover, before vacuum unit 13 starts, start refrigerating units 8 earlier, the temperature of refrigerating units 8 is adjusted to-25 ℃, and the aqueous solution of 30% ethylene glycol is carried in the cooling water inlet pipe road 10 that passes through refrigerating units 8 in condenser 11, start vacuum unit 13 then, open and vacuumize 6 pairs of impregnating vessels 16 of pneumatic operated valve and vacuumize, the gas that makes the residual styrene that contains in the impregnating vessel 16 and other diluent volatile matter is before entering vacuum unit 13,11 condensations become liquid through condenser earlier, and are trapped in the condenser 11, and condensed liquid can regularly discharge reuse.Reach and effectively avoid styrene and other diluent volatile matter to enter the practical function that vacuum unit 13 causes gel obstruction and spontaneous combustion blast.
Vacuum is divided into three grades and vacuumizes, when vacuum degree in the impregnating vessel 16 is extracted into less than 100Pa, the gas that contains other diluent such as styrene in air in the workpiece internal clearance and the impregnating vessel 16 can be drained only, and the empty 180min of fidelity.Open defeated lacquer valve 2 then, the insulating varnish in the air accumulator 3 is input in the impregnating vessel 16 through filter 20 by transmission pipe road 1, when insulating varnish is passed to the height of setting, closes defeated lacquer valve 2, simultaneously closure set lacquer valve 19.At this moment, the dipping workpiece all is immersed in the insulating varnish, promptly in impregnating vessel 16, form wet vacuum and keep 60～100min, make insulating varnish enter workpiece inside by negative pressure, be full of gap and fully combination, the gas that insulating varnish inside carries secretly, free styrene monomer, free resin monomer are overflowed in insulating varnish with the form of bubble, and what stay insulating varnish inside is pure resin and the styrene that can not overflow.Adopt this kind method, main purpose is to improve the performance of high-voltage motor, makes that to enter the high-voltage coil insulation gas inside minimum, to reduce the dielectric loss of machine winding coil inside.
Afterwards, put vacuum, open the blowdown valve on the blow-off line 12, gas-entrained, the styrene free monomer and the resin free monomer that are overflowed with bubble form in insulating varnish inside are got rid of in impregnating vessel 16.
Pressure process is by adding compression pump, opens pressurization pneumatic operated valve 5, and the nitrogen of drying is pressed in the impregnating vessel 16, make a jar internal pressure reach 0.5～0.8Mpa, and pressurize 360～400min, in this process, by the effect of workpiece inner pore, insulating varnish can be pressed into coil insulation inside.Put the employing of pressure process and put pressure twice, putting for the first time pressure is to open blowdown valve, nitrogen in the impregnating vessel 16 is got rid of, make the pressure in the impregnating vessel 16 keep the pressure differential that is higher than atmospheric pressure 0.1～0.2Mpa, like this in returning the lacquer process, by impregnating vessel 16 pressure inside insulating varnish is pushed back in the storage paint can 3, can reduce the remaining lacquer liquid in the impregnating vessel 16, the drop that also helps unnecessary lacquer liquid in the workpiece removes.After treating that lacquer liquid drop in impregnating vessel 16 and the workpiece is clean, carry out putting second time pressure again, equal to jar internal pressure and atmospheric pressure.After putting pressure, can open impregnating vessel 16, hang out workpiece.
Claims (5)
1, a kind of anti-explosion vacuum pressure varnished insulation apparatus, comprise impregnating vessel, storage paint can, vacuum unit, it is characterized in that: on the vacuum pipe between impregnating vessel and the vacuum unit, have additional the condenser that is connected with refrigerating units, and be provided with the collection paint can in the bottom of impregnating vessel, this collection paint can one end is communicated with impregnating vessel, and the other end is communicated with the transmission pipe road of storage paint can by defeated, time lacquer valve.
2, anti-explosion vacuum pressure varnished insulation apparatus according to claim 1, it is characterized in that: described impregnating vessel intracavity bottom is provided with cone shape collection lacquer plate, the centre of this plate has into lacquer, time lacquer through hole, and the slave plate center is 6～10 ° to the gradient of tank skin.
3, anti-explosion vacuum pressure varnished insulation apparatus according to claim 1, it is characterized in that: described collection paint can is the closed container structure, the pipeline that is communicated with between its top and the impregnating vessel is provided with collection lacquer valve, and the bottom is communicated with the position with the transmission pipe road of storage paint can and is provided with defeated, time lacquer valve.
4, anti-explosion vacuum pressure varnished insulation apparatus according to claim 1, it is characterized in that: described condenser is a tank body that seals up and down, be provided with circulating cooling pipe in the tank body, the inlet channel of cooling water pipe and outlet conduit are communicated with refrigerating units respectively, and discharging tube and tapping valve are equipped with in the tank body bottom.
5, a kind of process that is used for anti-explosion vacuum pressure varnished insulation apparatus, it is characterized in that: described process may further comprise the steps:
Condensation: impregnated workpiece is put into impregnating vessel, tighten cover, before the vacuum unit starting, start refrigerating units earlier, the refrigerating units temperature is adjusted to-25 ℃, and in condenser, carry the aqueous solution of 30% ethylene glycol by the cooling pipe of refrigerating units, in the process that startup vacuum unit vacuumizes impregnating vessel, gas (gas includes other diluents such as styrene) in jar is condensed into liquid by condenser, and is trapped in the condenser, can regularly discharge reuse.
Vacuumize: close blowdown valve, safety valve and defeated lacquer valve, the vacuum degree of the one-level pump of vacuum unit is set to 10000Pa; The vacuum degree of two stage pump is set to 5000Pa; The vacuum degree of triplex is set to 1000Pa; Start the vacuum unit, when the vacuum degree in the impregnating vessel reached 5000Pa, two stage pump started automatically; When two stage pump was extracted into 1000Pa with the vacuum in the impregnating vessel, triplex started automatically, and vacuum degree is extracted into less than 100Pa in impregnating vessel, the vacuum compressor emergency shutdown.
The fidelity sky: behind the vacuum compressor emergency shutdown, impregnating vessel enters the empty stage of fidelity automatically, the empty 180min of fidelity;
Defeated lacquer: after the empty time of fidelity arrives, open defeated lacquer valve, under the vacuum pressure effect, the insulating varnish in the storage paint can is inhaled lacquer by transmission pipe road negative pressure in impregnating vessel;
Wet vacuum: insulating varnish is passed to the height of setting, closes defeated lacquer valve, still has certain vacuum degree in the impregnating vessel, is wet vacuum, under the effect of this kind vacuum, keeps 60～100min;
Put vacuum: open the blowdown valve on impregnating vessel top, gas-entrained, the styrene free monomer and the resin free monomer that are overflowed with bubble form in insulating varnish inside are got rid of in impregnating vessel;
Pressurization: startup adds compression pump, opens pressurizing valve, and in the nitrogen injection impregnating vessel with drying, extremely a jar internal pressure reaches 0.5～0.8Mpa;
Pressurize: when the pressure in the impregnating vessel reaches 0.5～0.8Mpa, close pressurizing valve, impregnating vessel enters packing state, pressurize 360～400min;
Put pressure: after the pressurize, open blowdown valve, the nitrogen in the impregnating vessel is got rid of, be higher than atmospheric pressure 0.1～0.2Mpa to the impregnating vessel internal pressure.
Return lacquer: open defeated, time lacquer valve, insulating varnish is pushed back in the storage paint can by the transmission pipe road by the impregnating vessel pressure inside.
Put pressure: open blowdown valve, with the overbottom pressure emptying of impregnating vessel inside, equal to jar internal pressure and atmospheric pressure.
Go out jar: open the dipping lacquer cover, workpiece is hung out.
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| CN200710054100A CN100578897C (en) | 2007-03-23 | 2007-03-23 | Anti-explosion vacuum pressure varnished insulation apparatus and its technical method |
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Address after: 473000 No. 22 Zhongjing North Road, Nanyang, Henan Patentee after: Nanyang Explosion Protection Group Co., Ltd. Address before: 474400 Nanyang Explosion Protection Group Co., Ltd., 22 Zhongjing North Road, Henan, Nanyang Patentee before: Nanyang Explosion Protection Group Co., Ltd. |
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Granted publication date: 20100106 Termination date: 20130323 |