CN103208351A - Dry-type transformer for mining flameproof movable substation - Google Patents
Dry-type transformer for mining flameproof movable substation Download PDFInfo
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- CN103208351A CN103208351A CN2012105901607A CN201210590160A CN103208351A CN 103208351 A CN103208351 A CN 103208351A CN 2012105901607 A CN2012105901607 A CN 2012105901607A CN 201210590160 A CN201210590160 A CN 201210590160A CN 103208351 A CN103208351 A CN 103208351A
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Abstract
The invention relates to a dry-type transformer for a mining flameproof movable substation. As carbon/magnesium composite materials with remarkable energy-saving effects are used as an iron core, the iron core is provided with a stress-free structure, a simultaneously winding and integral epoxy resin pouring process is implemented by the aid of a whole winding with excellent electrical, mechanical and environmental performances, a clamping part realizes an all-insulated structure compacted by a nonmetal clamping part by the aid of an enhanced epoxy resin molding integral structure filled with carbon fibers, and an upper clamping part and a lower clamping part achieve uniform stress and reliable clamping effects by wrapping a screw rod of a thermal shrinkage belt and tensioning multi-group symmetrical uniform parts. The parts are scientifically, organically and reliably combined, electrical and flameproof requirements of a coal mine are met, and performances such as applicability, energy conservation, environmental protection, safety and reliability are newly broken through and improved.
Description
Technical field
The present invention relates to the electric power supply unit of flame-proof mine field, be specifically related to a kind of flameproof mining mobile transformer substation dry-type transformer.
Background technology
Flameproof mining mobile transformer substation generally is applied in dry-type transformer and contains methane blended gas and coal dust and have in the mine of explosion hazard.This dry-type transformer comprises the case shell and is positioned at the dry-type transformer of case shell, at present, flameproof dry type transformer generally is impregnated dry-type transformer, and to be the folded sign indicating number of a silicon steel sheet formula, coil adopt the rectangular structure of corrugated plating splicing with bag insulated copper lead coiling and impregnated insulating paint, shell to its iron core.Shortcomings such as this type of flameproof dry type transformer exists the loss height, noise is big, volume is big, moisture resistivity is poor, the winding mechanical strength is low, the easy puncture of minor insulation.During use in narrow tunnel area occupied big, walk or tie up working area when parking, and easily scratching pedestrian or object; The power consumption height causes the operating cost height, and the big contaminated environment of noise; Increase maintenance and stop the platform frequency because various shortcoming failure rates are high, not only influence production but also strengthen maintenance cost.Simultaneously, the wattage of dry-type transformer is more big, heat is just more big, and in order to guarantee its explosion insulation performance preferably, the volume of dry-type transformer case shell should be as much as possible little, this is affected with regard to the heat radiation that causes dry-type transformer, in order to increase the heat loss through radiation of dry-type transformer, the sidewall design of case shell is corrugated sheet, though improved the heat-sinking capability of dry-type transformer, but when its wattage is higher, still can't satisfy dry-type transformer temperature rise problem of higher.
Summary of the invention
Purpose of the present invention is big with the dry-type transformer volume at current flameproof mining mobile transformer substation with regard to being, power consumption is high, noise is big, moisture-sensitive, operational reliability are poor, operating cost increases and brings problems such as economic loss for country and user, provide a kind of have the life-span long, loss is low, noise is little, non-maintaining, high reliability, pollution-free, flameproof mining mobile transformer substation be with amorphous alloy iron core all insulation dry-type transformer.
The present invention is owing to select for use Remarkable Energy Saving carbon/magnesium base composite material to realize the iron core structure that do not stress as iron core; Adopt the whole winding electric, mechanical, that environmental-protecting performance is excellent, implement with around with integral loop epoxy resins pouring technology; Folder adopts the molding for epoxy resin overall structure of filled with carbon fibers enhancing, all insulation structure that the nonmetal folder of realization compresses; Folder from top to bottom adopt the wrapping pyrocondensation belt screw rod, use many groups, symmetry, the tension of uniform layout, realize evenly stressed, tighten reliable effect.Above-mentioned parts science, organic, reliable combination except satisfying electric, the flame proof that use in the colliery require, have new breakthrough and lifting for applicability, energy-saving and environmental protection, aspect of performance such as safe and reliable.
A kind of flameproof mining mobile transformer substation dry-type transformer, comprise height, low-voltage coil, iron core, folder and casing, high, low-voltage coil all adopts the rectangle winding, be provided with insulating cylinder between high-tension coil and the low-voltage coil, high-tension coil and low-voltage coil interlayer are equipped with insulating barrier and stay, high-tension coil and low-voltage coil adopt vertically heat radiation air flue, it is characterized in that: iron core adopts carbon/magnesium base composite material, the molding for epoxy resin overall structure that folder adopts filled with carbon fibers to strengthen, be stained with graphite material on the casing, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material may further comprise the steps
The first step, usefulness carbon/magnesium ribbon material are made the rectangle iron core framework;
Second step, have on the iron core framework on the end face of carbon/magnesium ribbon material lap seam and paste the grid carbon fibre material, the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and the part that the grid carbon fibre material is exceeded described superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
The 3rd step, upset iron core framework are at iron core framework another side repeating step two
Wherein, the stickup step of grid carbon fibre material is in described second step,
The end face upper berth grid carbon fibre material that has the lap seam of carbon/magnesium ribbon material on a, the iron core framework, the part that the grid carbon fibre material is exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, described insulating cement is epoxy resin
B, in grid carbon fibre material surface and grid slit, evenly apply insulating cement;
C, insulating cement solidify
Wherein, the cast step of described epoxy resin is,
The first step pouring can preheating 6～8 hours, makes the internal temperature of pouring can reach 80 ± 2 ℃; Simultaneously mixing tank is preheating to 50 ± 2 ℃;
Second step, the work car that is loaded with molded coil is advanced in the pouring can, get the transparent heat resistant plastic pipe one is terminated on the pouring can valve, the other end puts in the pouring can apart from bottom 150 ± 30mm, and with binding strap pouring can is fixed on the casting mold, check that closing cast after errorless irritates door;
The 3rd step, earlier with epoxy resin by the weight portion of 80～110 weight portion and epoxy curing agent 90～110 stir mixture;
In the 4th step, mix in the mill base adding mixing tank with said mixture and 2～4 weight portions;
The 5th step was heated to 70 ℃ with mixing tank, was evacuated down to more than the 5.5mbar, stirred the degassing 3～5 hours; Before cast 10～20 minutes, close vacuum valve, stop to stir, opening the charging valve, in the accelerator mixture suction mixing tank with the flexibilizer of 20.5～25.5 weight portions and 0.31～0.41 weight portion, close the charging valve, open vacuum valve, vacuumize and be stirred to the no bubble in glue surface; Then connect a jar degassing 24b;
The 6th step earlier with vacuum pouring jar heating 6～8 hours, when temperature reaches 80 ℃, kept beginning to vacuumize after 1～2 hour, treated that vacuum degree reaches 5.5mbar when above, keeps 2～3 hours;
The 7th step, slowly open the cast valve, control solation speed is 1.5～2kg/mm, pours into a mould;
After glue is seen on coil top, to close the cast valve and observe glue face situation, liquid level stops cast and left standstill under vacuum state 10～20 minutes when reaching apart from mould top 15 ± 2mm; Leave standstill and finish slowly releasing vacuum of back, open cast after the releasing vacuum and irritate door, release work car changes curing oven over to and is cured processing.
Beneficial effect:
1. because adopting carbon/magnesium base composite material as iron core and the iron core structure that do not stress, its no-load loss falls on a year-on-year basis more than 80% than silicon sheet core, and energy-saving effect is remarkable.
2. nonmetallic because adopting, carbon fiber reinforced epoxy casting moulding folder has reduced the lead wire insulation distance, reduces stray loss and eddy current loss, has dwindled the volume of transformer when reducing load loss.
3. the poured with epoxy resin dry-type transformer is the total incapsulation structure, and is nonhygroscopic, mechanical strength height, stable performance.
4. adopt all insulation integral structure of electrified body and fastener material, effectively reduce transformer body insulation inside and outside along face creepage distance and overvoltage lightning distance, guarantee the safe and reliable operation of transformer.
5. because adopting the flame retardant type all insulation fastening structure of the high poured with epoxy resin of thermal endurance class, eliminated the local overheating phenomenon that the iron core leakage field causes, the probability of the transformer hot stall that reduction local overheating phenomenon causes is guaranteed the fail safe of colliery operation.
6. because adopting the shell of circular cross-section all-wave line structure, volume is little, stressed evenly, mechanical strength is good, area of dissipation is big, scientific and reasonable for structure.
7. environment is not produced pollution, definitely do not have danger flammable or that pollutant leaks, be highly suitable for the colliery operation occasion of moist and contaminated environment.
8. noise is little, overload capacity is strong, partial discharge quantity is little, have anti-short circuit capability efficiently.
9. owing to adopt the three-phase five-limb structure, reduce the transformer height significantly; Adopt all insulation structure, reduce the volume of transformer significantly, and the shell of circular cross-section is specially adapted to the walking of narrow tunnel, colliery environment and parks the needs of operation.
Transformer coil adopts H level vacuum pressure impregnation enamelled coating, again through the high temperature baked and cured, thereby has guaranteed electric insulation intensity and the mechanical strength of coil, has improved the performance of whole transformer greatly, has prolonged the useful life of transformer.
Description of drawings
Fig. 1 is the structural representation of dry-type transformer;
Fig. 2 is the end view of Fig. 1.
Wherein, the 1st, upper clamping piece, the 2nd, carbon/magnesium base composite material iron core, the 3rd, end folder, the 4th, lower clamping piece.
Embodiment
A kind of flameproof mining mobile transformer substation dry-type transformer, comprise height, low-voltage coil, iron core, folder and casing, high, low-voltage coil all adopts the rectangle winding, be provided with insulating cylinder between high-tension coil and the low-voltage coil, high-tension coil and low-voltage coil interlayer are equipped with insulating barrier and stay, high-tension coil and low-voltage coil adopt vertically heat radiation air flue, it is characterized in that: iron core adopts carbon/magnesium base composite material, the molding for epoxy resin overall structure that folder adopts filled with carbon fibers to strengthen, be stained with graphite material on the casing, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material may further comprise the steps
The first step, usefulness carbon/magnesium ribbon material are made the rectangle iron core framework;
Second step, have on the iron core framework on the end face of carbon/magnesium ribbon material lap seam and paste the grid carbon fibre material, the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and the part that the grid carbon fibre material is exceeded described superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
The 3rd step, upset iron core framework are at iron core framework another side repeating step two
Wherein, the stickup step of grid carbon fibre material is in described second step,
The end face upper berth grid carbon fibre material that has the lap seam of carbon/magnesium ribbon material on a, the iron core framework, the part that the grid carbon fibre material is exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, described insulating cement is epoxy resin
B, in grid carbon fibre material surface and grid slit, evenly apply insulating cement;
C, insulating cement solidify
Wherein, the cast step of described epoxy resin is,
The first step pouring can preheating 6～8 hours, makes the internal temperature of pouring can reach 80 ± 2 ℃; Simultaneously mixing tank is preheating to 50 ± 2 ℃;
Second step, the work car that is loaded with molded coil is advanced in the pouring can, get the transparent heat resistant plastic pipe one is terminated on the pouring can valve, the other end puts in the pouring can apart from bottom 150 ± 30mm, and with binding strap pouring can is fixed on the casting mold, check that closing cast after errorless irritates door;
The 3rd step, earlier with epoxy resin by the weight portion of 80～110 weight portion and epoxy curing agent 90～110 stir mixture;
In the 4th step, mix in the mill base adding mixing tank with said mixture and 2～4 weight portions;
The 5th step was heated to 70 ℃ with mixing tank, was evacuated down to more than the 5.5mbar, stirred the degassing 3～5 hours; Before cast 10～20 minutes, close vacuum valve, stop to stir, opening the charging valve, in the accelerator mixture suction mixing tank with the flexibilizer of 20.5～25.5 weight portions and 0.31～0.41 weight portion, close the charging valve, open vacuum valve, vacuumize and be stirred to the no bubble in glue surface; Then connect a jar degassing 24b;
The 6th step earlier with vacuum pouring jar heating 6～8 hours, when temperature reaches 80 ℃, kept beginning to vacuumize after 1～2 hour, treated that vacuum degree reaches 5.5mbar when above, keeps 2～3 hours;
The 7th step, slowly open the cast valve, control solation speed is 1.5～2kg/mm, pours into a mould;
After glue is seen on coil top, to close the cast valve and observe glue face situation, liquid level stops cast and left standstill under vacuum state 10～20 minutes when reaching apart from mould top 15 ± 2mm; Leave standstill and finish slowly releasing vacuum of back, open cast after the releasing vacuum and irritate door, release work car changes curing oven over to and is cured processing.
It should be noted that at last: obviously, above-described embodiment only is for the application's example clearly is described, and is not the restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And the apparent variation of being amplified out thus or change still are among the protection range of the application's type.
Claims (1)
1. flameproof mining mobile transformer substation dry-type transformer, comprise height, low-voltage coil, iron core, folder and casing, high, low-voltage coil all adopts the rectangle winding, be provided with insulating cylinder between high-tension coil and the low-voltage coil, high-tension coil and low-voltage coil interlayer are equipped with insulating barrier and stay, high-tension coil and low-voltage coil adopt vertically heat radiation air flue, it is characterized in that: iron core adopts carbon/magnesium base composite material, the molding for epoxy resin overall structure that folder adopts filled with carbon fibers to strengthen, be stained with graphite material on the casing, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material may further comprise the steps
The first step, usefulness carbon/magnesium ribbon material are made the rectangle iron core framework;
Second step, have on the iron core framework on the end face of carbon/magnesium ribbon material lap seam and paste the grid carbon fibre material, the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and the part that the grid carbon fibre material is exceeded described superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
The 3rd step, upset iron core framework are at iron core framework another side repeating step two
Wherein, the stickup step of grid carbon fibre material is in described second step,
The end face upper berth grid carbon fibre material that has the lap seam of carbon/magnesium ribbon material on a, the iron core framework, the part that the grid carbon fibre material is exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, described insulating cement is epoxy resin
B, in grid carbon fibre material surface and grid slit, evenly apply insulating cement;
C, insulating cement solidify
Wherein, the cast step of described epoxy resin is,
The first step pouring can preheating 6～8 hours, makes the internal temperature of pouring can reach 80 ± 2 ℃; Simultaneously mixing tank is preheating to 50 ± 2 ℃;
Second step, the work car that is loaded with molded coil is advanced in the pouring can, get the transparent heat resistant plastic pipe one is terminated on the pouring can valve, the other end puts in the pouring can apart from bottom 150 ± 30mm, and with binding strap pouring can is fixed on the casting mold, check that closing cast after errorless irritates door;
The 3rd step, earlier with epoxy resin by the weight portion of 80～110 weight portion and epoxy curing agent 90～110 stir mixture;
In the 4th step, mix in the mill base adding mixing tank with said mixture and 2～4 weight portions;
The 5th step was heated to 70 ℃ with mixing tank, was evacuated down to more than the 5.5mbar, stirred the degassing 3～5 hours; Before cast 10～20 minutes, close vacuum valve, stop to stir, opening the charging valve, in the accelerator mixture suction mixing tank with the flexibilizer of 20.5～25.5 weight portions and 0.31～0.41 weight portion, close the charging valve, open vacuum valve, vacuumize and be stirred to the no bubble in glue surface; Then connect a jar degassing 24b;
The 6th step earlier with vacuum pouring jar heating 6～8 hours, when temperature reaches 80 ℃, kept beginning to vacuumize after 1～2 hour, treated that vacuum degree reaches 5.5mbar when above, keeps 2～3 hours;
The 7th step, slowly open the cast valve, control solation speed is 1.5～2kg/mm, pours into a mould;
After glue is seen on coil top, to close the cast valve and observe glue face situation, liquid level stops cast and left standstill under vacuum state 10～20 minutes when reaching apart from mould top 15 ± 2mm; Leave standstill and finish slowly releasing vacuum of back, open cast after the releasing vacuum and irritate door, release work car changes curing oven over to and is cured processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210590160.7A CN103208351B (en) | 2012-12-29 | 2012-12-29 | A kind of flameproof mining mobile transformer substation dry-type transformer |
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| CN201210590160.7A CN103208351B (en) | 2012-12-29 | 2012-12-29 | A kind of flameproof mining mobile transformer substation dry-type transformer |
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| CN103208351B CN103208351B (en) | 2015-12-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426607A (en) * | 2013-08-02 | 2013-12-04 | 安徽稳利达变压器科技有限公司 | Iron core of amorphous alloy transformer and manufacture method thereof |
| CN107732700A (en) * | 2017-10-13 | 2018-02-23 | 盐城市宇能电气有限公司 | Flameproof mining mobile transformer substation low-voltage variation case |
| CN107863211A (en) * | 2017-09-28 | 2018-03-30 | 广东福德电子有限公司 | A kind of high pressure damped resistor and its manufacturing process |
| CN115101325A (en) * | 2022-07-26 | 2022-09-23 | 南京大全变压器有限公司 | Material mixing device for pouring multi-winding dry type transformer coil |
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| WO1999028926A2 (en) * | 1997-11-27 | 1999-06-10 | Abb Ab | A transformer/reactor and a method for manufacture of a transformer/reactor |
| CN101308721A (en) * | 2007-05-14 | 2008-11-19 | 沈阳昊诚电气有限公司 | Epoxy cast dry transformer |
| CN202487357U (en) * | 2012-03-21 | 2012-10-10 | 山东先河悦新机电股份有限公司 | Dry type transformer for explosion suppression type mobile substation for amorphous alloy mining |
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2012
- 2012-12-29 CN CN201210590160.7A patent/CN103208351B/en active Active
Patent Citations (4)
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| CN1155742A (en) * | 1996-01-22 | 1997-07-30 | 山东省金曼克电气股份有限公司 | Dry transformer of fire-proof epoxy resin |
| WO1999028926A2 (en) * | 1997-11-27 | 1999-06-10 | Abb Ab | A transformer/reactor and a method for manufacture of a transformer/reactor |
| CN101308721A (en) * | 2007-05-14 | 2008-11-19 | 沈阳昊诚电气有限公司 | Epoxy cast dry transformer |
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| 冯康红: "环氧树脂干式变压器的特点及应用", 《甘肃科技》, vol. 21, no. 5, 30 May 2005 (2005-05-30), pages 111 - 112 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426607A (en) * | 2013-08-02 | 2013-12-04 | 安徽稳利达变压器科技有限公司 | Iron core of amorphous alloy transformer and manufacture method thereof |
| CN103426607B (en) * | 2013-08-02 | 2016-01-20 | 安徽稳利达变压器科技有限公司 | The iron core of amorphous alloy transformer and manufacture method thereof |
| CN107863211A (en) * | 2017-09-28 | 2018-03-30 | 广东福德电子有限公司 | A kind of high pressure damped resistor and its manufacturing process |
| CN107732700A (en) * | 2017-10-13 | 2018-02-23 | 盐城市宇能电气有限公司 | Flameproof mining mobile transformer substation low-voltage variation case |
| CN115101325A (en) * | 2022-07-26 | 2022-09-23 | 南京大全变压器有限公司 | Material mixing device for pouring multi-winding dry type transformer coil |
| CN115101325B (en) * | 2022-07-26 | 2023-11-03 | 南京大全变压器有限公司 | Mixing device for casting multi-winding dry-type transformer coil |
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| CN103208351B (en) | 2015-12-23 |
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Address after: 224005 Youxi Road 88, salt capital, Yancheng City, Jiangsu Patentee after: Jiangsu bait Polytron Technologies Inc. Address before: 224011 Youxi Road 88, salt capital, Yancheng City, Jiangsu Patentee before: Jiangsu Zhonglian Electric Co.,Ltd. |
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Effective date of registration: 20180518 Address after: 224005 Youxi Road 88, salt capital, Yancheng City, Jiangsu Patentee after: JIANGSU ZHONGLIAN ELECTRIC Co.,Ltd. Address before: 224005 Youxi Road 88, salt capital, Yancheng City, Jiangsu Patentee before: Jiangsu bait Polytron Technologies Inc. |
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