CN103943351A - High-voltage winding die pouring technology with filler of dry type transformer - Google Patents
High-voltage winding die pouring technology with filler of dry type transformer Download PDFInfo
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Abstract
The invention discloses a high-voltage winding die pouring technology with filler of a dry type transformer. The following three factors are considered comprehensively, namely first, a winding needs to be subjected to drying processing, and after processing, epoxy resin mixed material pouring is carried out under a vacuum state; second, after epoxy resin mixed materials are heated, degassing and dehydrating are carried out; and third, the epoxy resin mixed materials are poured into the winding under the vacuum state. Meanwhile, a series of technological parameters such as drying temperature, time, the vacuum degree during pouring, the flow during pouring, penetrating speed and pouring speed are combined. Finally, the high-voltage winding obtained by pouring has better performance parameters.
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 resin band filler placingJi Shu, belongs at present dry-type transformer 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 performance, outward appearance and the useful life of winding.
The vacuum pouring of dry-type transformer winding, utilizes vacuum technique to build a vacuum state inside and outside the having living space of winding exactly, then allows mixture of epoxy resins fill the space that all needs are filled.This vacuum casting method for epoxy resin can play two objects to winding, the one, zero defect insulation resin, the 2nd, the insulation between conductor be adhesively fixed, strengthen electrical equipment intensity and the mechanical strength of winding.
Accomplish winding zero defect, inner cast completely, must accomplish three aspects:, first aspect winding will be dried processing, after processing, under vacuum state, carry out mixture of epoxy resins cast, second aspect, mixture of epoxy resins carries out degassed after heating, processed, the third aspect, under vacuum state, mixture of epoxy resins to be poured in the middle of winding, these 3 of real grasps are not so simple, be related to a series of technological parameter, such as winding baking temperature, time, vacuum degree when cast, flow when 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.Curing time, temperature etc.And these relations are dynamic, such as the height of winding, diameter, the auxiliary flow to cast such as thickness and speed are not identical.Therefore, design and develop a kind of dry-type transformer winding epoxy resin band filler placingJi Shu that meets above-mentioned condition and seem particularly important.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of dry-type transformer band filler high pressure winding group mould pouring technology is provided.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is:
A kind of dry-type transformer band filler high pressure winding group mould pouring technology, comprises the steps:
Step 1, by drawing each point of wiring position arranged after, soldering copper terminal, after having welded, wait scolder solidifies, then use cold water cooling, the terminal after all welding is round and smooth with flat file and emery cloth polishing, and with being of a size of, 0.03 × 25mm polyester argon amine film half-stack package is two-layer, use again 0.12 × 25mm glass fiber strap half-stack package two-layer, 1/2nd positions by outlet root bag to binding post; Mould and all seal grooves of outlet panel are placed to adhesive tape, after terminal is completely cooling, use electric bridge measuring resistance, be determined with without rosin joint, whether tap position is correct;
Step 2, outlet panel is connected with bolt with outlet terminal, outlet panel is connected with mould chassis simultaneously, protect plus tapping etween the lines, distance 15mm between point wiring and this section of coil, between two sections, tap linear distance is greater than 20mm; Glass cement is beaten in sealing joint strip outside, all junctions of outlet panel, then by outer die casing on coil, external mold interface 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 external mold in four screw-pressings in mould upper end, glass cement sealing will be beaten to by interior external mold total interface place;
When step 3, fastening outlet terminal and outlet panel connecting screw, set bolt clamp nut;
Step 4, coil groups mould is inserted to curing oven be dried processing, 100 DEG C of the following baking temperatures of 1250KVA, baking time four hours, 100 DEG C of the above baking temperatures of 1600KVA, baking time five hours;
Coil after step 5, dry finishing dealing with proceeds to pouring can, connects cast pipeline and die casting mouth the processing that fixes, and closes pouring can door and is then warming up to 70 DEG C, vacuumize subsequently processing, require vacuum degree 0.5mbar, the above-mentioned time is three hours, temperature 70 C in tank;
Step 6, castable processing, when ambient temperature is during lower than 15 DEG C, castable is sealed to unpacking, put into curing oven, at 50 DEG C of temperature, toast and within 3 hours, make its reduced viscosity, according to poured into a mould coil quantity, the consumption that pro rata calculates each material is added to curing agent, resin in mixing tank, to mix degassed processed after weighing; Start before degassed dehydration is stirred first to vacuumize, stir again after closing vacuum valve, when material to be mixed does not have air pocket, stir degassed dehydration directly vacuumizing, until batch mixing liquid level does not have bubble; The mass ratio of described resin and curing agent is: 100:100;
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum degree is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, large coil cast suspends 5 minutes in 1 minute, small coil cast half a minute is suspended 5 minutes, and be between 50 minutes-70 minutes pouring time, and coil waters Man Houjing to be put 0.5 hour; The diameter of described large coil is greater than 35cm, and the diameter of described small coil is less than 35cm;
Step 8, releasing vacuum, execute malleation 4bar to coil, keeps 15min, pressure relief;
Step 9, open pouring can door, collect cast clout, open successively gate spool and fix, then will pour into a mould pipeline clout and reclaim totally, transfer to curing oven by having poured into a mould coil;
Step 10, coil precuring: coil precuring comprises two parameters, one is temperature parameter, and one is time parameter, and when temperature is 75 DEG C, need 4 hours curing time; When temperature is to need 1 hour 90 DEG C of curing times; When temperature is 110 DEG C, need 2 hours curing time; When temperature is 125 DEG C, need 3 hours curing time;
Step 11, casting equipment are cleaned: clean mixing tank and respectively pour into a mould valve pipeline with alcohol, then by each cast valve open;
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove and compress cross screw rod subsequently, remove subsequently the clamp bar of outlet panel, remove subsequently outlet panel and chassis set bolt, take off subsequently external mold, outlet panel;
Step 13, regelate; Coil after form removal is entered to stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, is incubated after 2 hours, then is cooled to 50 DEG C and comes out of the stove while being then cooled to 70 DEG C with stove;
Step 14, cleaning mould: all glass cements on mould are cleaned out, cleaned with gasoline, for subsequent use after smearing release agent;
Step 15, coil arrange: coil corner is polished flat after reason, wipe clean, be stained with silicone grease smear thin layer with clean cotton.
Advantage and good effect that the present invention has are: first: the coil that utilizes pouring technology of the present invention to pour into a mould out has better performance parameter and mass parameter; Secondly, pouring technology of the present invention has stronger operability.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples:
A kind of dry-type transformer band filler high pressure winding group mould pouring technology, step 1, by drawing each point of wiring position arranged after, soldering copper terminal, after having welded, wait for that scolder solidifies, then use cold water cooling, terminal after all welding is round and smooth with flat file and emery cloth polishing, with being of a size of, 0.03 × 25mm polyester argon amine film half-stack package is two-layer, then uses 0.12 × 25mm glass fiber strap half-stack package two-layer, 1/2nd positions by outlet root bag to binding post; Mould and all seal grooves of outlet panel are placed to adhesive tape, after terminal is completely cooling, use electric bridge measuring resistance, be determined with without rosin joint, whether tap position is correct; Whether tap position is correct;
Step 2, outlet panel is connected with bolt with outlet terminal, outlet panel is connected with mould chassis simultaneously, protect plus tapping etween the lines, distance 15mm between point wiring and this section of coil, between two sections, tap linear distance is greater than 20mm; Glass cement is beaten in sealing joint strip outside, all junctions of outlet panel, then by outer die casing on coil, external mold interface 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 external mold in four screw-pressings in mould upper end, glass cement sealing will be beaten to by interior external mold total interface place;
When step 3, fastening outlet terminal and outlet panel connecting screw, set bolt clamp nut; While being fastening outlet terminal and outlet panel connecting screw, must fix bolted nut;
Step 4, coil groups mould is inserted to curing oven be dried processing, 100 DEG C of the following baking temperatures of 1250KVA, baking time four hours, 100 DEG C of the above baking temperatures of 1600KVA, baking time five hours (heating-up time is disregarded);
Coil after step 5, dry finishing dealing with proceeds to pouring can, connect cast pipeline and die casting mouth the processing that fixes, close pouring can door and be then warming up to 70 DEG C, vacuumize subsequently processing, require vacuum degree 0.5mbar, the above-mentioned time is three hours (disregard heating-up time and vacuum be evacuated to 0.5mbar process time), temperature 70 C in tank;
Step 6, castable processing, when ambient temperature is during lower than 15 DEG C, seal unpacking by castable, puts into curing oven, toasts and within 3 hours, make its reduced viscosity, so that use at 50 DEG C of temperature.(before castable is processed, mixing tank can be heated to 70 DEG C in advance), according to poured into a mould coil quantity, the consumption that pro rata calculates each material is added to curing agent, resin in mixing tank, to mix degassed processed after weighing; Start before degassed dehydration is stirred first to vacuumize, stir again after closing vacuum valve, when material to be mixed does not have macroscopic air pocket, stir degassed dehydration directly vacuumizing, until batch mixing liquid level does not have bubble; The mass ratio of described resin and curing agent is: 100:100;
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum degree is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, diameter large coil cast of (containing 35cm) more than 35cm suspends 5 minutes in 1 minute, diameter is less than the small coil of 33cm following (containing 32cm) and pours into a mould half a minute time-out 5 minutes, and be between 50 minutes-70 minutes pouring time, and coil waters Man Houjing to be put 0.5 hour; Till peephole observation rising head liquid level is emerged without air pocket;
Step 8, releasing vacuum, execute malleation 4bar to coil, keeps 15min, pressure relief; Observe rising head liquid level decline degree, as needs carry out feed supplement;
Step 9, open pouring can door, collect cast clout, open successively gate spool and fix, then will pour into a mould pipeline clout and reclaim totally, transfer to curing oven by having poured into a mould coil;
Step 10, coil precuring: coil precuring comprises two parameters, one is temperature parameter, and one is time parameter, and when temperature is 75 DEG C, need 4 hours curing time; When temperature is to need 1 hour 90 DEG C of curing times; When temperature is 110 DEG C, need 2 hours curing time; When temperature is 125 DEG C, need 3 hours curing time;
Step 11, casting equipment are cleaned: clean mixing tank and respectively pour into a mould valve pipeline with alcohol, then by each cast valve open;
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove and compress cross screw rod subsequently, remove subsequently the clamp bar of outlet panel, remove subsequently outlet panel and chassis set bolt, take off subsequently external mold, outlet panel; (as band air flue is first extracted air flue plate), dismantle and extract the inner tube of a tyre; When form removal, notice that coil is injury-free;
Step 13, regelate; Coil after form removal is entered to stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, is incubated after 2 hours, then is cooled to 50 DEG C and comes out of the stove while being then cooled to 70 DEG C with stove;
Step 14, cleaning mould: all glass cements on mould are cleaned out, cleaned with gasoline, for subsequent use after smearing release agent;
Step 15, coil arrange: coil corner is polished flat after reason, wipe clean, be stained with silicone grease smear thin layer with clean cotton, after the assay was approved warehouse-in.
Above embodiments of the invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve, within all should still belonging to patent covering scope of the present invention.
Claims (1)
1. a dry-type transformer band filler high pressure winding group mould pouring technology, is characterized in that: comprise the steps:
Step 1, by drawing each point of wiring position arranged after, soldering copper terminal, after having welded, wait scolder solidifies, then use cold water cooling, the terminal after all welding is round and smooth with flat file and emery cloth polishing, and with being of a size of, 0.03 × 25mm polyester argon amine film half-stack package is two-layer, use again 0.12 × 25mm glass fiber strap half-stack package two-layer, 1/2nd positions by outlet root bag to binding post; Mould and all seal grooves of outlet panel are placed to adhesive tape, after terminal is completely cooling, use electric bridge measuring resistance, be determined with without rosin joint, whether tap position is correct;
Step 2, outlet panel is connected with bolt with outlet terminal, outlet panel is connected with mould chassis simultaneously, protect plus tapping etween the lines, distance 15mm between point wiring and this section of coil, between two sections, tap linear distance is greater than 20mm; Glass cement is beaten in sealing joint strip outside, all junctions of outlet panel, then by outer die casing on coil, external mold interface 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 external mold in four screw-pressings in mould upper end, glass cement sealing will be beaten to by interior external mold total interface place;
When step 3, fastening outlet terminal and outlet panel connecting screw, set bolt clamp nut;
Step 4, coil groups mould is inserted to curing oven be dried processing, 100 DEG C of the following baking temperatures of 1250KVA, baking time four hours, 100 DEG C of the above baking temperatures of 1600KVA, baking time five hours;
Coil after step 5, dry finishing dealing with proceeds to pouring can, connects cast pipeline and die casting mouth the processing that fixes, and closes pouring can door and is then warming up to 70 DEG C, vacuumize subsequently processing, require vacuum degree 0.5mbar, the above-mentioned time is three hours, temperature 70 C in tank;
Step 6, castable processing, when ambient temperature is during lower than 15 DEG C, castable is sealed to unpacking, put into curing oven, at 50 DEG C of temperature, toast and within 3 hours, make its reduced viscosity, according to poured into a mould coil quantity, the consumption that pro rata calculates each material is added to curing agent, resin in mixing tank, to mix degassed processed after weighing; Start before degassed dehydration is stirred first to vacuumize, stir again after closing vacuum valve, when material to be mixed does not have air pocket, stir degassed dehydration directly vacuumizing, until batch mixing liquid level does not have bubble; The mass ratio of described resin and curing agent is: 100:100;
Step 7, start cast: when pouring can temperature is 70 DEG C, vacuum degree is 1.2mbar, according to the quantity of molded coil, kind, descending, by high pressure to low pressure, large coil cast suspends 5 minutes in 1 minute, small coil cast half a minute is suspended 5 minutes, and be between 50 minutes-70 minutes pouring time, and coil waters Man Houjing to be put 0.5 hour;
Step 8, releasing vacuum, execute malleation 4bar to coil, keeps 15min, pressure relief;
Step 9, open pouring can door, collect cast clout, open successively gate spool and fix, then will pour into a mould pipeline clout and reclaim totally, transfer to curing oven by having poured into a mould coil;
Step 10, coil precuring: coil precuring comprises two parameters, one is temperature parameter, and one is time parameter, and when temperature is 75 DEG C, need 4 hours curing time; When temperature is to need 1 hour 90 DEG C of curing times; When temperature is 110 DEG C, need 2 hours curing time; When temperature is 125 DEG C, need 3 hours curing time;
Step 11, casting equipment are cleaned: clean mixing tank and respectively pour into a mould valve pipeline with alcohol, then by each cast valve open;
Step 12, form removal: first remove high-tension coil outlet terminal and connect outlet board bolt, remove and compress cross screw rod subsequently, remove subsequently the clamp bar of outlet panel, remove subsequently outlet panel and chassis set bolt, take off subsequently external mold, outlet panel;
Step 13, regelate; Coil after form removal is entered to stove, and temperature conditions is 125 DEG C, and time conditions is 5 hours, is incubated after 2 hours, then is cooled to 50 DEG C and comes out of the stove while being then cooled to 70 DEG C with stove;
Step 14, cleaning mould: all glass cements on mould are cleaned out, cleaned with gasoline, for subsequent use after smearing release agent;
Step 15, coil arrange: coil corner is polished flat after reason, wipe clean, be stained with silicone grease smear thin layer with clean cotton.
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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 CN103943351B (en) | 2016-07-13 |
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Cited By (12)
| 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 |
| CN105321705A (en) * | 2015-10-14 | 2016-02-10 | 国家电网公司 | Pouring technology for dry-type transformer coils |
| CN106816306A (en) * | 2017-03-24 | 2017-06-09 | 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 |
| CN107316743A (en) * | 2017-08-02 | 2017-11-03 | 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 |
| CN110993330A (en) * | 2019-10-31 | 2020-04-10 | 广州市一变电气设备有限公司 | Manufacturing method of transformer coil and oven device |
| CN112259360A (en) * | 2020-12-22 | 2021-01-22 | 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 |
| CN113012926A (en) * | 2021-02-18 | 2021-06-22 | 江苏大航有能输配电有限公司 | Method for removing residual gas of encapsulated insulated winding |
| CN113963947A (en) * | 2021-11-10 | 2022-01-21 | 山东电工电气集团智能电气有限公司 | Mold for coil casting, casting method and isolation transformer winding structure |
| 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 |
| WO2022233279A1 (en) * | 2021-05-07 | 2022-11-10 | 浙江江山变压器股份有限公司 | Dry-type transformer cast by polyurethane resin and processing method therefor |
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Cited By (15)
| 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 |
| CN105321705A (en) * | 2015-10-14 | 2016-02-10 | 国家电网公司 | Pouring technology for dry-type transformer coils |
| CN106816306B (en) * | 2017-03-24 | 2019-01-22 | 广州供电局有限公司 | The pouring technology of reactor winding |
| CN106816306A (en) * | 2017-03-24 | 2017-06-09 | 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 |
| CN107316743A (en) * | 2017-08-02 | 2017-11-03 | 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 |
| CN110993330A (en) * | 2019-10-31 | 2020-04-10 | 广州市一变电气设备有限公司 | Manufacturing method of transformer coil and oven device |
| CN112259360A (en) * | 2020-12-22 | 2021-01-22 | 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 |
| 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 |
| CN113012926A (en) * | 2021-02-18 | 2021-06-22 | 江苏大航有能输配电有限公司 | Method for removing residual gas of encapsulated insulated winding |
| WO2022233279A1 (en) * | 2021-05-07 | 2022-11-10 | 浙江江山变压器股份有限公司 | Dry-type transformer cast by polyurethane resin and processing method therefor |
| 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 |
| CN113963947A (en) * | 2021-11-10 | 2022-01-21 | 山东电工电气集团智能电气有限公司 | Mold for coil casting, casting method and isolation transformer winding structure |
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