CN103943351B - Dry-type transformer band filler high pressure winding group mould pouring technology - Google Patents
Dry-type transformer band filler high pressure winding group mould pouring technology Download PDFInfo
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- CN103943351B CN103943351B CN201410178568.2A CN201410178568A CN103943351B CN 103943351 B CN103943351 B CN 103943351B CN 201410178568 A CN201410178568 A CN 201410178568A CN 103943351 B CN103943351 B CN 103943351B
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Abstract
The invention discloses a kind of dry-type transformer band filler high pressure winding group mould pouring technology, by considering the factor of following three aspects: first aspect winding wants dried, mixture of epoxy resins cast is carried out under vacuum conditions after process, second aspect, mixture of epoxy resins carries out degassed after heating, processed, the third aspect, is be poured in the middle of winding by mixture of epoxy resins under vacuum conditions；In combination with a series of technological parameter, such as winding baking temperature, the time, vacuum during cast, flow during cast, the speed of infiltration, the speed of cast；The high pressure winding pouring into a mould out is finally made to have better performance parameter.
Description
Technical field
The present invention relates to transformer technology field, particularly relate to a kind of dry-type transformer band filler high pressure winding group mould pouring technology.
Background technology
Dry-type transformer winding epoxy ribbons filler placingJi Shu, belongs to dry-type transformer at present and manufactures more advanced technology.Poured with epoxy resin main component of transformer is winding, and the placingJi Shu of winding and technological level directly affect the performance of winding, outward appearance and service life.
Dry-type transformer winding vacuum pouring, it is simply that utilize vacuum technique one vacuum state of all Space creation inside and outside winding, then allows mixture of epoxy resins fill all of space needing and filling.Winding can be played two purposes by this vacuum casting method for epoxy resin, and one is zero defect insulation resin, and two is insulation between conductor and be adhesively fixed, and strengthens electrical equipment intensity and the mechanical strength of winding.
Accomplish winding zero defect, internal cast is completely, three aspects must be accomplished, first aspect winding wants dried, mixture of epoxy resins cast is carried out under vacuum conditions after process, second aspect, mixture of epoxy resins carries out degassed after heating, processed, the third aspect, it is under vacuum conditions mixture of epoxy resins is poured in the middle of winding, real grasp these 3 is less than simple, it is related to a series of technological parameter, such as winding baking temperature, time, vacuum during cast, flow during cast, the speed of infiltration, the speed of cast.Mixture of epoxy resins degassed, the degree of processed, the proportioning of mixture of epoxy resins component, viscosity.Hardening time, temperature etc..And these relations are dynamic, the height of such as winding, diameter, the auxiliary flow poured into a mould to thickness etc. and speed are not identical.Therefore, design and develop a kind of dry-type transformer winding epoxy ribbons filler placingJi Shu meeting above-mentioned condition to be particularly important.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of dry-type transformer band filler high pressure winding group mould pouring technology.
The present invention solves that the technical problem existed in known technology is adopted the technical scheme that:
A kind of dry-type transformer band filler high pressure winding group mould pouring technology, comprises the steps:
Step one, by drawing by after good for each tap wire location arrangements, welding copper tip, after having welded, wait solder solidification, then cooling down with cold water, terminal flat file and emery cloth polishing after all welding are round and smooth, with being of a size of 0.03 × 25mm polyester argon amine film half-stack package two-layer, again by 0.12 × 25mm glass fiber strap half-stack package two-layer, by 1/2nd positions of outlet root bag to binding post；All to mould and outlet panel seal grooves are placed adhesive tape, after terminal cools down completely, uses electric bridge measuring resistance, it is determined that with or without rosin joint, whether tap position is correct；
Step 2, outlet panel and outlet terminal being connected with, is connected with mould chassis by outlet panel simultaneously, between guarantor's plus tapping line and line, the spacing 15mm of tap wire and this section of coil, between two sections, tap wire distance is more than 20mm；Glass cement is beaten outside the sealing joint strip of outlet panel all junctions, then by outer die casing on coil, external mold seam and outlet panel junction are together with bolt on clip band, fastening outlet panel and chassis bolt, external mold interface bolt, then will compress cross and place mould upper end external mold in four screw-pressings, and interior external mold total interface place be beaten glass cement and seals；
When step 3, fastening outlet terminal are with outlet panel connecting screw, fixing bolt clamp nut；
Step 4, coil groups mould is inserted curing oven it is dried process, below 1250KVA baking temperature 100 DEG C, baking time four hours, more than 1600KVA baking temperature 100 DEG C, baking time five hours；
Step 5, dried complete after coil proceed to pouring can, connect cast pipeline and die casting mouth processs that fix, closedown pouring can door then heats to 70 DEG C, carry out evacuation process subsequently, requiring vacuum 0.5mbar, the above-mentioned time is three hours, temperature 70 C in tank；
Step 6, castable process, when ambient temperature is lower than 15 DEG C, by castable encapsulating unpacking, put into curing oven, at 50 DEG C of temperature, baking makes its decrease in viscosity in 3 hours, according to the number of coils poured into a mould, pro rata calculates and is added in mixing tank by firming agent, resin after the consumption of each material is weighed to carry out mixing degassed processed；Wanting first evacuation before starting degassed dehydration stirring, be stirred for after closing vacuum valve, material to be mixed does not have during air pocket to stir degassed dehydration at direct evacuation, until batch mixing liquid level does not have bubble；The mass ratio of described resin and firming agent is: 100:100；
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, big coil is poured into a mould 1 minute and is suspended 5 minutes, little coil is poured into a mould half a minute and is suspended 5 minutes, and the duration of pouring is between 50 minutes-70 minutes, and coil waters after completely quiet puts 0.5 hour；The diameter of described big coil is more than 35cm, and the diameter of described little coil is less than 35cm；
Step 8, releasing vacuum, execute malleation 4bar, keep 15min, pressure relief coil；
Step 9, open pouring can door, collect cast clout, open gate spool successively and fix, then cast pipeline clout is reclaimed clean, transfer to curing oven by having poured into a mould coil；
Step 10, coil precuring: coil precuring includes two parameters, one is temperature parameter, and one is time parameter, when temperature is 75 DEG C, needs 4 hours hardening time；When temperature be need 90 DEG C of hardening times 1 little time；When temperature is 110 DEG C, need 2 hours hardening time；When temperature is 125 DEG C, need 3 hours hardening time；
Step 11, casting equipment clean: with alcohol washes mixing tank and respectively pour into a mould valve pipeline, are then opened by each cast valve；
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove subsequently and compress cross screw rod, remove the clamp bar of outlet panel subsequently, remove outlet panel bolt fixing with chassis subsequently, take off external mold, outlet panel subsequently；
Step 13, secondary solidify；Coil after form removal is entered stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, when being then cooled to 70 DEG C with stove after insulation 2 hours, then is cooled to 50 DEG C and comes out of the stove；
Step 14, cleaning mould: glass cements all on mould are cleaned out, cleans with gasoline, standby after smearing release agent；
Step 15, coil arrange: polished flat coil corner after reason, wipe clean, be stained with silicone grease with clean cotton and smear thin layer.
First the present invention has the advantage that and has the benefit effect that: utilize the coil that the pouring technology of the present invention pours into a mould out to have better performance parameter and mass parameter；Secondly, the pouring technology of the present invention has higher operability.
Detailed description of the invention
For the summary of the invention of the present invention, feature and effect can be further appreciated that, hereby enumerate following example:
A kind of dry-type transformer band filler high pressure winding group mould pouring technology, step one, by drawing by after good for each tap wire location arrangements, welding copper tip, after having welded, wait solder solidification, then cool down with cold water, terminal flat file and emery cloth polishing after all welding are round and smooth, with being of a size of 0.03 × 25mm polyester argon amine film half-stack package two-layer, then by 0.12 × 25mm glass fiber strap half-stack package two-layer, by 1/2nd positions of outlet root bag to binding post；All to mould and outlet panel seal grooves are placed adhesive tape, after terminal cools down completely, uses electric bridge measuring resistance, it is determined that with or without rosin joint, whether tap position is correct；Whether tap position is correct；
Step 2, outlet panel and outlet terminal being connected with, is connected with mould chassis by outlet panel simultaneously, between guarantor's plus tapping line and line, the spacing 15mm of tap wire and this section of coil, between two sections, tap wire distance is more than 20mm；Glass cement is beaten outside the sealing joint strip of outlet panel all junctions, then by outer die casing on coil, external mold seam and outlet panel junction are together with bolt on clip band, fastening outlet panel and chassis bolt, external mold interface bolt, then will compress cross and place mould upper end external mold in four screw-pressings, and interior external mold total interface place be beaten glass cement and seals；
When step 3, fastening outlet terminal are with outlet panel connecting screw, fixing bolt clamp nut；Namely bolt clamp nut must be fixed when fastening outlet terminal and outlet panel connecting screw；
Step 4, coil groups mould is inserted curing oven it is dried process, below 1250KVA baking temperature 100 DEG C, baking time four hours, more than 1600KVA baking temperature 100 DEG C, baking time five hours (heating-up time is disregarded)；
Step 5, dried complete after coil proceed to pouring can, connect cast pipeline and die casting mouth the process that fixes, close pouring can door and then heat to 70 DEG C, carry out evacuation process subsequently, require vacuum 0.5mbar, be three hours (disregard the heating-up time and vacuum is evacuated to the process time of 0.5mbar), temperature 70 C in tank of above-mentioned time；
Step 6, castable process, and when ambient temperature is lower than 15 DEG C, by castable encapsulating unpacking, put into curing oven, and at 50 DEG C of temperature, baking makes its decrease in viscosity in 3 hours, in order to use.(before castable processes, mixing tank can heat in advance to 70 DEG C), according to the number of coils poured into a mould, pro rata calculates and is added in mixing tank by firming agent, resin after the consumption of each material is weighed to carry out mixing degassed processed；Wanting first evacuation before starting degassed dehydration stirring, be stirred for after closing vacuum valve, material to be mixed does not have during macroscopic air pocket to stir degassed dehydration at direct evacuation, until batch mixing liquid level does not have bubble；The mass ratio of described resin and firming agent is: 100:100；
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, diameter suspends 5 minutes in 1 minute in the big coil cast of more than 35cm (containing 35cm), the diameter little coil less than below 33cm (containing 32cm) is poured into a mould half a minute and is suspended 5 minutes, and the duration of pouring is between 50 minutes-70 minutes, and coil waters after completely quiet puts 0.5 hour；Till peephole observation rising head liquid level is emerged without air pocket；
Step 8, releasing vacuum, execute malleation 4bar, keep 15min, pressure relief coil；Observe rising head liquid level decline degree, if desired for carrying out feed supplement；
Step 9, open pouring can door, collect cast clout, open gate spool successively and fix, then cast pipeline clout is reclaimed clean, transfer to curing oven by having poured into a mould coil；
Step 10, coil precuring: coil precuring includes two parameters, one is temperature parameter, and one is time parameter, when temperature is 75 DEG C, needs 4 hours hardening time；When temperature be need 90 DEG C of hardening times 1 little time；When temperature is 110 DEG C, need 2 hours hardening time；When temperature is 125 DEG C, need 3 hours hardening time；
Step 11, casting equipment clean: with alcohol washes mixing tank and respectively pour into a mould valve pipeline, are then opened by each cast valve；
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove subsequently and compress cross screw rod, remove the clamp bar of outlet panel subsequently, remove outlet panel bolt fixing with chassis subsequently, take off external mold, outlet panel subsequently；(as band air flue first extracts air flue plate), dismantle and extract the inner tube of a tyre；Notice during form removal that coil is injury-free；
Step 13, secondary solidify；Coil after form removal is entered stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, when being then cooled to 70 DEG C with stove after insulation 2 hours, then is cooled to 50 DEG C and comes out of the stove；
Step 14, cleaning mould: glass cements all on mould are cleaned out, cleans with gasoline, standby after smearing release agent；
Step 15, coil arrange: polished flat coil corner after reason, wipe clean, be stained with silicone grease with clean cotton and smear thin layer, put in storage after the assay was approved.
Above embodiments of the invention are described in detail, but described content has been only presently preferred embodiments of the present invention, it is impossible to be considered the practical range for limiting the present invention.All equalizations made according to the present patent application scope change and improve, and all should still belong within the patent covering scope of the present invention.
Claims (1)
1. a dry-type transformer band filler high pressure winding group mould pouring technology, it is characterised in that: comprise the steps:
Step one, by drawing by after good for each tap wire location arrangements, welding copper tip, after having welded, wait solder solidification, then cooling down with cold water, terminal flat file and emery cloth polishing after all welding are round and smooth, with being of a size of 0.03 × 25mm polyester argon amine film half-stack package two-layer, again by 0.12 × 25mm glass fiber strap half-stack package two-layer, by 1/2nd positions of outlet root bag to binding post；All to mould and outlet panel seal grooves are placed adhesive tape, after terminal cools down completely, uses electric bridge measuring resistance, it is determined that with or without rosin joint, whether tap position is correct；
Step 2, outlet panel and outlet terminal being connected with, is connected with mould chassis by outlet panel simultaneously, between guarantor's plus tapping line and line, the spacing 15mm of tap wire and this section of coil, between two sections, tap wire distance is more than 20mm；Glass cement is beaten outside the sealing joint strip of outlet panel all junctions, then by outer die casing on coil, external mold seam and outlet panel junction are together with bolt on clip band, fastening outlet panel and chassis bolt, external mold interface bolt, then will compress cross and place mould upper end external mold in four screw-pressings, and interior external mold total interface place be beaten glass cement and seals；
When step 3, fastening outlet terminal are with outlet panel connecting screw, fixing bolt clamp nut；
Step 4, coil groups mould is inserted curing oven it is dried process, below 1250KVA baking temperature 100 DEG C, baking time four hours, more than 1600KVA baking temperature 100 DEG C, baking time five hours；
Step 5, dried complete after coil proceed to pouring can, connect cast pipeline and die casting mouth the process that fixes, close pouring can door and then heat to 70 DEG C, carry out evacuation process subsequently, require vacuum 0.5mbar, above-mentioned dried is completed after coil proceed to time of pouring can and be connected cast pipeline and die casting mouth and the time of the process that fixes is total up to three hours；Temperature 70 C in tank；
Step 6, castable process, when ambient temperature is lower than 15 DEG C, by castable encapsulating unpacking, put into curing oven, at 50 DEG C of temperature, baking makes its decrease in viscosity in 3 hours, according to the number of coils poured into a mould, pro rata calculates and is added in mixing tank by firming agent, resin after the consumption of each material is weighed to carry out mixing degassed processed；Wanting first evacuation before starting degassed dehydration stirring, be stirred for after closing vacuum valve, material to be mixed does not have during air pocket to stir degassed dehydration at direct evacuation, until batch mixing liquid level does not have bubble；The mass ratio of described resin and firming agent is: 100:100；
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, big coil is poured into a mould 1 minute and is suspended 5 minutes, little coil is poured into a mould half a minute and is suspended 5 minutes, and the duration of pouring is between 50 minutes-70 minutes, and coil waters after completely quiet puts 0.5 hour；
Step 8, releasing vacuum, execute malleation 4bar, keep 15min, pressure relief coil；
Step 9, open pouring can door, collect cast clout, open gate spool successively and fix, then cast pipeline clout is reclaimed clean, transfer to curing oven by having poured into a mould coil；
Step 10, coil precuring: coil precuring includes two parameters, one is temperature parameter, and one is time parameter, when temperature is 75 DEG C, needs 4 hours hardening time；When temperature be need 90 DEG C of hardening times 1 little time；When temperature is 110 DEG C, need 2 hours hardening time；When temperature is 125 DEG C, need 3 hours hardening time；
Step 11, casting equipment clean: with alcohol washes mixing tank and respectively pour into a mould valve pipeline, are then opened by each cast valve；
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove subsequently and compress cross screw rod, remove the clamp bar of outlet panel subsequently, remove outlet panel bolt fixing with chassis subsequently, take off external mold, outlet panel subsequently；
Step 13, secondary solidify；Coil after form removal is entered stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, when being then cooled to 70 DEG C with stove after insulation 2 hours, then is cooled to 50 DEG C and comes out of the stove；
Step 14, cleaning mould: glass cements all on mould are cleaned out, cleans with gasoline, standby after smearing release agent；
Step 15, coil arrange: polished flat coil corner after reason, wipe clean, be stained with silicone grease with clean cotton and smear thin layer.
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| CN201410178568.2A CN103943351B (en) | 2014-04-29 | 2014-04-29 | Dry-type transformer band filler high pressure winding group mould pouring technology |
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| CN201410178568.2A CN103943351B (en) | 2014-04-29 | 2014-04-29 | Dry-type transformer band filler high pressure winding group mould pouring technology |
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| CN103943351B true CN103943351B (en) | 2016-07-13 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875311A (en) * | 2015-04-24 | 2015-09-02 | 江苏天利机电有限公司 | Production and pouring method of dry type transformer coil |
| CN105321705B (en) * | 2015-10-14 | 2018-01-26 | 国家电网公司 | A kind of pouring technology of dry-type transformer coil |
| CN106816306B (en) * | 2017-03-24 | 2019-01-22 | 广州供电局有限公司 | The pouring technology of reactor winding |
| CN107159532A (en) * | 2017-05-25 | 2017-09-15 | 佛山市明富兴金属材料有限公司 | A kind of method for debugging agent curing |
| CN107316743B (en) * | 2017-08-02 | 2019-06-28 | 无锡市电力滤波有限公司 | A kind of pouring technology of dry-type power electronic capacitor |
| CN110739149A (en) * | 2019-10-28 | 2020-01-31 | 江苏靖江互感器股份有限公司 | Epoxy resin pouring tool and pouring process for framework coils |
| CN110993330B (en) * | 2019-10-31 | 2021-06-22 | 广州市一变电气设备有限公司 | Manufacturing method of transformer coil and oven device |
| CN112259360B (en) * | 2020-12-22 | 2021-03-02 | 三变科技股份有限公司 | Production method and turn number verification method of epoxy resin cast coil of dry-type transformer |
| CN113012926B (en) * | 2021-02-18 | 2022-09-02 | 悉瑞绿色电气(苏州)有限公司 | Method for removing residual gas of encapsulated insulated winding |
| CN113223814B (en) * | 2021-05-07 | 2023-03-24 | 浙江江山变压器股份有限公司 | Dry-type transformer molded by casting polyurethane resin and processing method thereof |
| CN113977866A (en) * | 2021-10-27 | 2022-01-28 | 永州精智电子科技有限公司 | Mould for injecting glue of small transformer |
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| CN103606453A (en) * | 2013-12-06 | 2014-02-26 | 浙江江山源光电气有限公司 | Dry-type transformer coil pouring die and method |
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| US9234712B2 (en) * | 2012-07-31 | 2016-01-12 | Abb Inc. | Self-aligning plug for positioning a temperature sensor within a transformer winding |
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|---|---|---|---|---|
| CN1222746A (en) * | 1998-01-09 | 1999-07-14 | 魏胜璋 | Transformer with thin insulating layer and deposited filler resin and its making method |
| EP2637176A1 (en) * | 2012-03-07 | 2013-09-11 | Siemens Aktiengesellschaft | Electric coil |
| CN103390493A (en) * | 2013-08-06 | 2013-11-13 | 天津维可特电力科技有限公司 | Winding method for high-tension coil with padding |
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