CN103208351B - A kind of flameproof mining mobile transformer substation dry-type transformer - Google Patents
A kind of flameproof mining mobile transformer substation dry-type transformer Download PDFInfo
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- CN103208351B CN103208351B CN201210590160.7A CN201210590160A CN103208351B CN 103208351 B CN103208351 B CN 103208351B CN 201210590160 A CN201210590160 A CN 201210590160A CN 103208351 B CN103208351 B CN 103208351B
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Abstract
The present invention relates to a kind of flameproof mining mobile transformer substation dry-type transformer, realize iron core owing to selecting the significant carbon/magnesium base composite material of energy-saving effect as iron core and not stress structure; Adopt electrically, the excellent whole winding of machinery, environmental-protecting performance, implement with around with integral loop epoxy resins pouring technology; The molding for epoxy resin overall structure that folder adopts filled with carbon fibers to strengthen, all insulation structure realizing nonmetal folder compression; Folder from top to bottom adopt wrapping pyrocondensation belt screw rod, use many groups, symmetry, uniform layout tension, realize uniform stressed, clamp reliable effect.Above-mentioned parts science, organic, reliably combine, except meeting electric, flame proof that colliery uses and requiring, have new breakthrough and lifting for applicability, energy-saving and environmental protection, the aspect of performance such as safe and reliable.
Description
Technical field
The present invention relates to flame-proof mine electrical power apparatus field, be specifically related to a kind of flameproof mining mobile transformer substation dry-type transformer.
Background technology
Flameproof mining mobile transformer substation dry-type transformer is generally applied in containing methane blended gas and coal dust and has in the mine of explosion hazard.This dry-type transformer comprises case shell and is positioned at the dry-type transformer of case shell, at present, flameproof dry type transformer is generally impregnated dry-type transformer, the rectangular structure that its iron core is silicon steel sheet stack code formula, the insulated copper wire coiling of coil bag impregnated insulating paint, shell adopt corrugated plating splicing.This type of flameproof dry type transformer also exists the shortcomings such as loss is high, noise is large, volume is large, moisture resistivity is poor, winding mechanical strength is low, minor insulation easily punctures.During use, in narrow tunnel, area occupied is large, ties up working area when walking or park, and easy scratching pedestrian or object; The high operating cost that causes that consumes energy is high, and the large contaminated environment of noise; Because various shortcoming failure rate height increases maintenance and stops the platform frequency, not only affect production but also strengthen maintenance cost.Simultaneously, the wattage of dry-type transformer is larger, heat is larger, and in order to ensure its good explosion insulation performance, the volume of dry-type transformer case shell should be little as much as possible, this is affected with regard to causing the heat radiation of 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, although improve the heat-sinking capability of dry-type transformer, but when its wattage is higher, the higher problem of dry-type transformer temperature rise still cannot be met.
Summary of the invention
Object of the present invention be just large for current flameproof mining mobile transformer substation dry-type transformer volume, consume energy high, noise large, moisture-sensitive, operational reliability are poor, operating cost increases and brings the problems such as economic loss to national and user, the life-span is long, loss is low, noise is little, non-maintaining, high reliability, pollution-free, flameproof mining mobile transformer substation amorphous alloy iron core all insulation dry-type transformer to provide one to have.
The present invention not to stress structure owing to selecting the significant carbon/magnesium base composite material of energy-saving effect to realize iron core as iron core; Adopt electrically, the excellent whole winding of machinery, environmental-protecting performance, implement with around with integral loop epoxy resins pouring technology; The molding for epoxy resin overall structure that folder adopts filled with carbon fibers to strengthen, all insulation structure realizing nonmetal folder compression; Folder from top to bottom adopt wrapping pyrocondensation belt screw rod, use many groups, symmetry, uniform layout tension, realize uniform stressed, clamp reliable effect.Above-mentioned parts science, organic, reliably combine, except meeting electric, flame proof that colliery uses and requiring, have new breakthrough and lifting for applicability, energy-saving and environmental protection, the 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 rectangle winding, insulating cylinder is provided with between high-tension coil and 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 the air flue that longitudinally dispels the heat, 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, casing is stained with graphite material, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material comprises the following steps,
The first step, use carbon/magnesium ribbon material make rectangle iron core framework;
End face second step, iron core framework with carbon/magnesium ribbon material lap seam pastes grid carbon fibre material, and the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and part grid carbon fibre material being exceeded superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
3rd step, upset iron core framework, repeat step 2 at iron core framework another side,
Wherein, in described second step, the gluing steps of grid carbon fibre material is,
A, iron core framework have the end face upper berth grid carbon fibre material of the lap seam of carbon/magnesium ribbon material, part grid carbon fibre material being exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, insulating cement is epoxy resin
B, grid carbon fibre material surface and grid gap in 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 DEG C; Mixing tank is preheating to 50 ± 2 DEG C simultaneously;
Second step, the work car being loaded with molded coil is advanced in pouring can, gets transparent heat resistant plastic pipe and terminated to by one on pouring can valve, the other end puts in pouring can apart from bottom 150 ± 30mm, and with binding strap, pouring can is fixed on casting mold, check that door is filled with in errorless rear closedown cast;
3rd step, first to stir epoxy resin to obtain mixture by the weight portion of 80 ~ 110 and the weight portion of epoxy curing agent 90 ~ 110;
4th step, adds the mill base of said mixture and 2 ~ 4 weight portions in mixing tank and is uniformly mixed;
5th step, is heated to 70 DEG C, is evacuated down to more than 5.5mbar by mixing tank, stir degassed 3 ~ 5 hours; Before cast 10 ~ 20 minutes, close vacuum valve, stop stirring, opening material inlet valve, by in the accelerator mixture suction mixing tank of the flexibilizer of 20.5 ~ 25.5 weight portions and 0.31 ~ 0.41 weight portion, close material inlet valve, open vacuum valve, vacuumize and be stirred to glue surface bubble-free; Then the degassed 24b of tank is connected;
6th step, first by vacuum pouring tank heating 6 ~ 8 hours, when temperature reaches 80 DEG C, keeps starting to vacuumize after 1 ~ 2 hour, when vacuum degree reaches more than 5.5mbar, keeps 2 ~ 3 hours;
7th step, slowly opens cast valve, and controlling solation speed is 1.5 ~ 2kg/mm, pours into a mould;
After glue is seen on coil top, close cast valve and observe glue liquid surface situation, liquid level reaches apart from stopping cast during die top 15 ± 2mm and leaving standstill 10 ~ 20 minutes under vacuum conditions; Slowly remove vacuum after standing end, open cast and fill with door after removing vacuum, release work car proceeds to curing oven and is cured process.
Beneficial effect:
1., because adopting carbon/magnesium base composite material not stress structure as iron core and iron core, its no-load loss falls more than 80% on a year-on-year basis than silicon sheet core, and energy-saving effect is remarkable.
2. nonmetallic because adopting, the shaping folder of carbon fiber reinforced epoxy casting, reduces lead wire insulation distance, reduces stray loss and eddy current loss, reduces the volume of transformer while reducing load loss.
3. Cast Resin Dry-Type Transformer is total incapsulation structure, nonhygroscopic, and mechanical strength is high, stable performance.
4. adopt all insulation integral structure of electrified body and fastener material, effectively reduce transformer body insulating 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, eliminating the local overheating phenomenon that iron core leakage field causes, reducing the probability of the transformer hot stall that local overheating phenomenon causes, guaranteeing the fail safe that colliery is run.
6., because adopting the shell of circular cross-section full ripple struction, volume is little, uniform force, mechanical strength are good, area of dissipation is large, scientific and reasonable for structure.
7. pair environment does not produce pollution, does not definitely have danger that is flammable or pollutant leakage, is highly suitable for colliery different areas of activity that is moist and contaminated environment.
8. noise is little, overload capacity is strong, partial discharge quantity is little, have efficient anti-short circuit capability.
9., owing to adopting three-phase five-limb structure, significantly reduce transformer height; Adopt all insulation structure, significantly reduce the volume of transformer, 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, then through high bake temperature solidification, thus ensure that electrical insulation strength and the mechanical strength of coil, greatly improve the performance of whole transformer, extend the useful life of transformer.
Accompanying drawing explanation
Fig. 1 is the structural representation of dry-type transformer;
Fig. 2 is the end view of Fig. 1.
Wherein, 1 is upper clamping piece, and 2 is carbon/magnesium base composite material iron cores, and 3 is end folders, and 4 is lower clamping pieces.
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 rectangle winding, insulating cylinder is provided with between high-tension coil and 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 the air flue that longitudinally dispels the heat, 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, casing is stained with graphite material, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material comprises the following steps,
The first step, use carbon/magnesium ribbon material make rectangle iron core framework;
End face second step, iron core framework with carbon/magnesium ribbon material lap seam pastes grid carbon fibre material, and the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and part grid carbon fibre material being exceeded superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
3rd step, upset iron core framework, repeat step 2 at iron core framework another side,
Wherein, in described second step, the gluing steps of grid carbon fibre material is,
A, iron core framework have the end face upper berth grid carbon fibre material of the lap seam of carbon/magnesium ribbon material, part grid carbon fibre material being exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, insulating cement is epoxy resin
B, grid carbon fibre material surface and grid gap in 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 DEG C; Mixing tank is preheating to 50 ± 2 DEG C simultaneously;
Second step, the work car being loaded with molded coil is advanced in pouring can, gets transparent heat resistant plastic pipe and terminated to by one on pouring can valve, the other end puts in pouring can apart from bottom 150 ± 30mm, and with binding strap, pouring can is fixed on casting mold, check that door is filled with in errorless rear closedown cast;
3rd step, first to stir epoxy resin to obtain mixture by the weight portion of 80 ~ 110 and the weight portion of epoxy curing agent 90 ~ 110;
4th step, adds the mill base of said mixture and 2 ~ 4 weight portions in mixing tank and is uniformly mixed;
5th step, is heated to 70 DEG C, is evacuated down to more than 5.5mbar by mixing tank, stir degassed 3 ~ 5 hours; Before cast 10 ~ 20 minutes, close vacuum valve, stop stirring, opening material inlet valve, by in the accelerator mixture suction mixing tank of the flexibilizer of 20.5 ~ 25.5 weight portions and 0.31 ~ 0.41 weight portion, close material inlet valve, open vacuum valve, vacuumize and be stirred to glue surface bubble-free; Then the degassed 24b of tank is connected;
6th step, first by vacuum pouring tank heating 6 ~ 8 hours, when temperature reaches 80 DEG C, keeps starting to vacuumize after 1 ~ 2 hour, when vacuum degree reaches more than 5.5mbar, keeps 2 ~ 3 hours;
7th step, slowly opens cast valve, and controlling solation speed is 1.5 ~ 2kg/mm, pours into a mould;
After glue is seen on coil top, close cast valve and observe glue liquid surface situation, liquid level reaches apart from stopping cast during die top 15 ± 2mm and leaving standstill 10 ~ 20 minutes under vacuum conditions; Slowly remove vacuum after standing end, open cast and fill with door after removing vacuum, release work car proceeds to curing oven and is cured process.
Last it is noted that obviously, above-described embodiment is only for the application's example is clearly described, and the restriction not 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 exhaustive without the need to also giving all execution modes.And thus the apparent change of amplifying out or variation be still among the protection range of the application's type.
Claims (1)
1. a flameproof mining mobile transformer substation dry-type transformer, comprise height, low-voltage coil, iron core, folder and casing, high, low-voltage coil all adopts rectangle winding, insulating cylinder is provided with between high-tension coil and 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 the air flue that longitudinally dispels the heat, 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, casing is stained with graphite material, described insulating cylinder is rectangle H class F insulation, wherein, the iron core preparation of carbon/magnesium base composite material comprises the following steps,
The first step, use carbon/magnesium ribbon material make rectangle iron core framework;
End face second step, iron core framework with carbon/magnesium ribbon material lap seam pastes grid carbon fibre material, and the width of grid carbon fibre material is greater than the thickness of carbon/magnesium ribbon material, and part grid carbon fibre material being exceeded superimposed thickness is pasted on carbon/magnesium ribbon material respectively;
3rd step, upset iron core framework, repeat step 2 at iron core framework another side,
Wherein, in described second step, the gluing steps of grid carbon fibre material is,
A, iron core framework have the end face upper berth grid carbon fibre material of the lap seam of carbon/magnesium ribbon material, part grid carbon fibre material being exceeded the thickness of described carbon/magnesium ribbon material covers on carbon/magnesium ribbon material; Wherein, insulating cement is epoxy resin
B, grid carbon fibre material surface and grid gap in 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 DEG C; Mixing tank is preheating to 50 ± 2 DEG C simultaneously;
Second step, the work car being loaded with molded coil is advanced in pouring can, gets transparent heat resistant plastic pipe and terminated to by one on pouring can valve, the other end puts in pouring can apart from bottom 150 ± 30mm, and with binding strap, pouring can is fixed on casting mold, check that door is filled with in errorless rear closedown cast;
3rd step, first to stir epoxy resin to obtain mixture by the weight portion of 80 ~ 110 and the weight portion of epoxy curing agent 90 ~ 110;
4th step, adds the mill base of said mixture and 2 ~ 4 weight portions in mixing tank and is uniformly mixed;
5th step, is heated to 70 DEG C, is evacuated down to more than 5.5mbar by mixing tank, stir degassed 3 ~ 5 hours; Before cast 10 ~ 20 minutes, close vacuum valve, stop stirring, opening material inlet valve, by in the accelerator mixture suction mixing tank of the flexibilizer of 20.5 ~ 25.5 weight portions and 0.31 ~ 0.41 weight portion, close material inlet valve, open vacuum valve, vacuumize and be stirred to glue surface bubble-free; Then the degassed 24b of tank is connected;
6th step, first by vacuum pouring tank heating 6 ~ 8 hours, when temperature reaches 80 DEG C, keeps starting to vacuumize after 1 ~ 2 hour, when vacuum degree reaches more than 5.5mbar, keeps 2 ~ 3 hours;
7th step, slowly opens cast valve, and controlling solation speed is 1.5 ~ 2kg/mm, pours into a mould;
After glue is seen on coil top, close cast valve and observe glue liquid surface situation, liquid level reaches apart from stopping cast during die top 15 ± 2mm and leaving standstill 10 ~ 20 minutes under vacuum conditions; Slowly remove vacuum after standing end, open cast and fill with door after removing vacuum, release work car proceeds to curing oven and is cured process.
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 | High-voltage damping resistor and manufacturing process 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 |
| CN115101325B (en) * | 2022-07-26 | 2023-11-03 | 南京大全变压器有限公司 | A mixing device for coil casting of multi-winding dry-type transformers |
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| CN1060580C (en) * | 1996-01-22 | 2001-01-10 | 山东省金曼克电气股份有限公司 | Dry transformer of fire-proof epoxy resin |
| SE510946C2 (en) * | 1997-11-27 | 1999-07-12 | Asea Brown Boveri | Transformer / reactor and method of manufacturing such and pre-fabricated winding module |
| CN101308721B (en) * | 2007-05-14 | 2010-09-08 | 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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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. |