CN101308721B - Epoxy cast dry transformer - Google Patents
Epoxy cast dry transformer Download PDFInfo
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- CN101308721B CN101308721B CN2007100112863A CN200710011286A CN101308721B CN 101308721 B CN101308721 B CN 101308721B CN 2007100112863 A CN2007100112863 A CN 2007100112863A CN 200710011286 A CN200710011286 A CN 200710011286A CN 101308721 B CN101308721 B CN 101308721B
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- yoke
- pressure winding
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- windings
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- 239000004593 Epoxy Substances 0.000 title claims description 18
- 238000004804 winding Methods 0.000 claims abstract description 77
- 239000010410 layer Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 239000011229 interlayer Substances 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 239000003822 epoxy resin Substances 0.000 abstract 5
- 229920000647 polyepoxide Polymers 0.000 abstract 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001429 stepping effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 210000004883 areola Anatomy 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Coils Of Transformers For General Uses (AREA)
Abstract
Disclosed is an epoxy resin cast dry-type transformer, which comprises a low-voltage winding, two high-voltage windings, an iron core, an upper heel piece, a lower heel piece, an upper clamp and a lower clamp. The low-voltage winding is arranged at the inner layer of the loop and the high-voltage windings are arranged at the outer layer of the loop. The low-voltage winding is made of clutch gold and is provided with an insulating interlayer which is presoaked with DMD resin. The initial loops of the high-voltage windings are located at one end of the whole loop, and the starting end of the first coil of each layer of the high-voltage windings is connected with the finishing end of the last coil of the next layer. The number of the coils of the windings descends from the inner layer to the outer layer, making the windings developing into antiparallelogram structures; a soft gridding cloth layer is arranged between each two adjacent layers; the whole medium is epoxy resin and solvent-free gridding material is arranged between the outer layers of the windings at both ends of the whole loop. The epoxy resin cast dry type transformer is reasonable in design, novel in design, large in power, and small in size, and is convenient to install and easy to maintain. The epoxy resin cast dry type transformer is safe, stable and reliable and is long in service life and low in using cost and requires no daily maintenance. The epoxy resin cast dry-type transformer has strong practicability and is applicable in power supplying departments and power consuming departments.
Description
Technical field
What the present invention relates to is transformer, and concrete is epoxy cast dry transformer.
Background technology
Transformer is the visual plant in generating, power supply and the electricity consumption enterprise, it also is in very crucial status in electrical network, be the extremely important equipment that guarantees power grid security, operation reliably and people's production and household electricity, and the material of the structure of power transformation device and making directly have influence on the quality and the safety of power supply.Though the making of transformer be one special, mature technique comparatively, yet,, need the shortcoming and defect that the transformer in using exists is rich in the transformation of actual effect according to the concrete environment for use of all departments and the situation of demand in order to improve the quality and safety of confession, electricity consumption.
Now the common epoxy cast dry transformer that uses just exists concrete shortcoming and defect in actual motion: what at first be that the high pressure winding of this transformer adopts is that coil by two sections continous way coilings constitutes, vertical electric capacity of this winding method is less, resisting longitudinal impacts the poor performance of disturbing, and can not overcome bigger longitudinal voliage and impact.Therefore, closing one for one in the impact of thunder and lightning and the operation, to close the big impulse disturbances that causes relatively poor.
Secondly the layer insulation of common epoxy cast dry transformer coil adopts polyester film and the synthetic DMD of nonwoven fabrics to isolate usually, because of the reason of material of insulation is restricted the permanence of layer insulation, mainly still adopt these materials wettability when cast poor, as easy as rolling off a log generation bubble, and the insulation property of whole coil are reduced greatly, be mainly reflected in partial discharge (PC value) greatly.
The coil of the common epoxy cast dry transformer that uses at present uses the dielectric kind many usually in addition.The whole heat resistanceheat resistant expansion rate of change and the medium field uniformity that this means coil are relatively poor, put into operation and be prone to be full of cracks after a period of time, this has not only influenced the useful life of coil, the partial discharge probability is significantly increased, to such an extent as to have to be out of service when serious, had a strong impact on fail safe and stability for, electricity consumption.
Also have if want the dielectric resin material that workmanship is superior, the epoxy cast dry transformer of stable performance is main to cost an arm and a leg, the transformer cost certainly just can not be low, and the efficient of producing is also low.
As all wishing for, electricity consumption department on the basis of the technical performance that keeps original epoxy cast dry transformer, can reduce cost, raise the efficiency, further improve and improve existing technical performance.
Summary of the invention
The objective of the invention is at vertical capacitance of present normally used epoxy cast dry transformer existence less, resisting longitudinal impacts the poor-performing that disturbs, easily produce partial discharge phenomenon, the cost of manufacture height, efficient is lower, packing space is little and cause dielectric strength poor, influence problems such as useful life and provide a kind of compact conformation, winding method convenient, the ability of lightning impulse resistant and switching impulse is stronger, have stronger layer insulation and end insulation, the partial discharge probability is similar to zero epoxy cast dry transformer.
Above-mentioned purpose is achieved through the following technical solutions:
Epoxy cast dry transformer comprises low pressure winding, two sections high pressure windings, iron core, upper clamping piece, lower clamping piece; Described iron core is provided with upper and lower yoke, is provided with left side post between the left end of upper and lower yoke, the upper/lower terminal of left side post respectively with the left end of upper and lower yoke overlap joint; Be provided with the right post between the right-hand member of upper and lower yoke, the upper/lower terminal of the right post respectively with the right-hand member of upper and lower yoke overlap joint; The middle part of upper and lower yoke is provided with center pillar, the upper/lower terminal of center pillar respectively with the middle part of upper and lower yoke overlap joint, on left and right two side columns and a center pillar, be equiped with whole winding respectively, the nexine of whole winding is provided with the low pressure winding, skin at the low pressure winding is provided with two sections high pressure windings, be respectively arranged with upper and lower folder on the two sides, front and back of upper and lower yoke and use bolt, its structural feature is:
Described low pressure winding adopts the Copper Foil coiling, the material layer that interlayer is provided with DMD resin prepreg stain insulate, the high pressure winding is arranged on the skin of low pressure winding, trapezoidal end is arranged at the two ends of each section high pressure winding, an initial circle coil of each layer winding desired location of next layer line circle that misplaces, starting of every layer of initial circle coil is connected with the intact head of following the last circle of one deck, the number of turn of every layer of winding is successively successively decreased to skin by nexine and is formed trapezoidal end, as shown in Figure 2, be equiped with one deck soft type grid cloth as insulating material between adjacent two-layer of high pressure winding; Peripheral equipment at the high pressure winding is provided with solvent-free grid material as external insulation.
The low pressure winding skin of above-mentioned whole winding is provided with two sections high pressure windings, and the output of high pressure winding such as Fig. 2 are that example is denoted as A, X with the A phase coil.
Epoxy cast dry transformer of the present invention reasonable in design conceived originally, kept the advantage of like product and technical performance also to have following characteristics outward:
1, epoxy cast dry transformer power is big, volume is little, and installing only needs less space.
2, when design gives necessary consideration to transformer contingent various potential safety hazards in service and taked corresponding techniques to guarantee and the test experience of fire, can be fire-retardant from putting out, need special safety measure.
3, update in design because of the present invention and improve, adopt new material and unique loop construction and fine-processing technique in the making, guaranteed the consistency of integral medium, thus in service safe, stable, reliable, the life-span is long, daily the needs safeguards that operation cost is low.
Thereby 4, belong to the place that closed system can be installed near power consumption equipment and reduced line loss (the feed radius is little).
5, environment is not produced pollution, the danger that does not definitely have flammable or polluter to leak, even breaking out of fire or produce under the situation of electric arc, can adventurous gas release yet, be highly suitable for humidity and IA.
6, overload capacity is strong, and the partial discharge quantity minimum has anti-short circuit capability efficiently.
7, loss is low, efficient is high, temperature characterisitic is strong, mechanical performance is high, anti-sudden short circuit ability strong, it is convenient to install, need not debugging.
Compact overall structure of the present invention, in the coiling of coil, the trapezoidal canoe that the high pressure winding adopts the number of turn successively to successively decrease has increased vertical capacitance of coil, improved the distributivity of the anti-impact of collision gradient of winding greatly, the ability of lightning impulse resistant and anti-switching impulse significantly strengthens.Quality material is selected in the making of epoxy cast dry transformer of the present invention for use, make the profit dissolubility of interlayer grid cloth can obtain tremendous increase, eliminate to greatest extent and reduced the cast space, thereby strengthened the dielectric strength of interlayer, the possibility of partial discharge is obviously reduced.Utilize the cold rolling silicon steel sheet of high-quality, reduce the magnetic hysteresis loss of transformer, having used solvent-free grid peripheral material decreases the electric discharge phenomena of polar substances and the ability of stored charge, thereby guaranteed the operation that epoxy cast dry transformer of the present invention is can be in high-tension power frequency electric field safe and reliable, reduced interference of noise greatly.
The present invention can cancel overhang insulation and other similar insulating material, and then guarantee the consistency of integral medium owing to adopted solvent-free grid peripheral material and ladder type loop construction, makes electric field more even.
Winding of the present invention is that vertical ladder type coil makes winding process more convenient, has significantly increased packing space, and simple installation is safeguarded easily.Can in any environment, work, especially moist, have corrosive gas or steam, have that conduct electricity the common especially oil-filled transformer in place of combustible dust irreplaceable, the present invention has extremely strong practicality, and various uses for, electricity consumption department suit.
Need to prove: under the prerequisite that does not change the principle of the invention and design, change of having done or distortion all belong to protection scope of the present invention.
Description of drawings
Fig. 1 is the main schematic diagram of looking of the present invention.
Fig. 2 is a loop construction schematic diagram of the present invention.
Fig. 3 is the schematic diagram that whole winding of the present invention is installed.
Embodiment
Embodiment
Manufacturing epoxy cast dry transformer is a very strong technology of manufacturability, and as Figure 1-3, epoxy cast dry transformer comprises low pressure winding 6, two sections high pressure windings 7, iron core.
Iron core is provided with yoke 1, lower yoke 2, is provided with left side post 3 between the left end of last yoke 1 and lower yoke 2, the upper/lower terminal of left side post 3 respectively with the left end of last yoke 1, lower yoke 2 overlap joint; Be provided with the right post 4 between the right-hand member of last yoke 1 and lower yoke 2, the upper/lower terminal of the right post 4 respectively with the right-hand member of last yoke 1 and lower yoke 2 overlap joint; The middle part of last yoke 1 and lower yoke 2 is provided with center pillar 5, the upper/lower terminal of center pillar 5 respectively with the middle part of last yoke 1 and lower yoke 2 overlap joint, iron core is to shear on full-automatic shearing equipment through the less high magnetic conduction silicon steel sheet of 30ZH120 grain orientation of well-designed employing magnetic hysteresis stroke, guarantees its shear precision.Simultaneously, the core structure of SC (B) type product adopts monolithic, four steppings, vertical ladder lamination mode automatic overlapping and assembling, thereby guarantee the required precision of monolithic closed assembly, on the iron core robust means, adopt the fastening structure of new shaped steel arm-tie, steel drawstring, both can compress winding effectively, can play the effect of tightening to left side post 3 and the right post 4, the center pillar 5 of iron core again, avoid it crooked and flexible, guarantee that by butterfly spring product is in operation and has constant thrust.Iron core adopts the synchronous stepping overlapping mode of full bias seam, can guarantee the optimum performance of iron core and minimum noise level.
Be equiped with whole winding 8 respectively on the left side post 3 and the right post 4 and a center pillar 5, the internal layer of whole winding 8 is provided with low pressure winding 6, skin at low pressure winding 6 is provided with two sections high pressure windings 7, be respectively arranged with two upper clamping pieces 9 and two lower clamping pieces 10 on the two sides, front and back of last yoke 1 and lower yoke 2, and use bolt respectively.
Low pressure winding 6 adopts Copper Foil to twine, and the insulating material that interlayer is provided with one deck DMD resin prepreg stain insulate.High pressure winding 7 adopts extraordinary subsection cylindrical formula structure to carry out coiling with the high-quality oxygen-free cupreous on the low pressure winding of coiling moulding, the starting of each layer line circle of an end that is every section high pressure winding 7 is dislocatedly distributed, become the head end that rises of high pressure winding 7, starting of every layer of initial circle is connected with the intact head of following the last circle of one deck, the number of turn of every layer of coiling is successively successively decreased to skin by nexine and is formed trapezoidal end, as shown in Figure 2, from projection: the outer contour of high pressure winding 7 has been formed antiparallelogram.The interlayer of high pressure winding 7 is equiped with one deck soft type grid cloth 11 as insulating material; Its grid specification is 2 * 4mm, is provided with solvent-free grid material 12 at the peripheral equipment of high pressure winding 7.Whole winding 8 is that the skin at low pressure winding 6 is provided with two sections high pressure windings 7, and the output of high pressure winding 7 such as Fig. 2 are that example is denoted as A, X with the A phase coil.
From projection angle: the middle part of whole winding 8 forms the hollow position of antiparallelogram relatively because of two trapezoidal ends, thereby has increased the filling space of pouring into a mould.Add resin extender, pre-buried resin heat radiation air flue after whole winding 8 coilings, outermost layer twines the glass fibre reinforced insulation, putting it into baker after whole winding 8 moulding solidifies, then whole winding 8 is placed in the preheating furnace up to the pouring temperature that reaches 180 ℃, the whole winding 8 that preheating is good is shifted into the vacuum pouring chamber, vacuum degree in casting room reaches the setting of 50-100Pa, and resin just is poured in the mould.The resin viscosity that mixes is very low, can fill areola, and combine together with the solvent-free grid material of soft type grid cloth, thereby reach minimum local discharging level, and after casting complete, whole winding 8 reaches last superperformance through overcuring.Make it to become the transformer coil that extremely strong anti-short circuit capability is arranged.
Claims (1)
1. epoxy cast dry transformer, comprise low pressure winding, two sections high pressure windings, iron core; Described iron core is provided with yoke (1) and lower yoke (2), is provided with left side post (3) between the left end of last yoke (1) and lower yoke (2), the upper/lower terminal of left side post (3) respectively with the left end of last yoke (1) and lower yoke (2) overlap joint; Be provided with the right post (4) between the right-hand member of last yoke (1) and lower yoke (2), the upper/lower terminal of the right post (4) overlaps with the right-hand member of last yoke (1) and lower yoke (2) respectively; The middle part of last yoke (1) and lower yoke (2) is provided with center pillar (5), on the center pillar (5), following two ends respectively with the middle part of last yoke (1) and lower yoke (2) overlap joint, on the left side post (3), be equiped with whole winding (8) respectively on a right post (4) and the center pillar (5), the nexine of whole winding (8) is provided with low pressure winding (6), skin at low pressure winding (6) is provided with two sections high pressure windings (7), be respectively arranged with two upper clamping pieces (9) and two lower clamping pieces (10) on the two sides, front and back of last yoke (1) and lower yoke (2), and use bolt in twos respectively, it is characterized in that:
Described low pressure winding (6) adopts the Copper Foil coiling, interlayer is provided with the insulating barrier of DMD resin prepreg stain, high pressure winding (7) is arranged on the skin of low pressure winding (6), the starting of each layer line circle of one end of every section high pressure winding (7) is dislocatedly distributed, become the head end that rises of high pressure winding (7), starting of every layer of initial circle is connected with the intact head of following the last circle of one deck, the number of turn of every layer of coiling is successively successively decreased to skin by nexine and is formed trapezoidal end, is provided with one deck soft type grid cloth (11) between adjacent two-layer of high pressure winding (7); Outer periphery at high pressure winding (7) is equipped with solvent-free grid material (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100112863A CN101308721B (en) | 2007-05-14 | 2007-05-14 | Epoxy cast dry transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100112863A CN101308721B (en) | 2007-05-14 | 2007-05-14 | Epoxy cast dry transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101308721A CN101308721A (en) | 2008-11-19 |
| CN101308721B true CN101308721B (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100112863A Expired - Fee Related CN101308721B (en) | 2007-05-14 | 2007-05-14 | Epoxy cast dry transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN101308721B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110521B (en) * | 2009-12-25 | 2013-01-23 | 上海宝钢设备检修有限公司 | Bias seam method for laminated iron core of transformer |
| CN101937759A (en) * | 2010-09-13 | 2011-01-05 | 无锡亿能电力设备有限公司 | Structure of high-voltage coil for dry-type transformer |
| CN102568789A (en) * | 2012-03-28 | 2012-07-11 | 沈阳全密封变压器股份有限公司 | Cylindrical coil structure for multi-stage capacity regulating transformer |
| CN103208351B (en) * | 2012-12-29 | 2015-12-23 | 江苏中联电气股份有限公司 | A kind of flameproof mining mobile transformer substation dry-type transformer |
| CN103050234B (en) * | 2013-01-08 | 2016-09-21 | 沈阳昊诚电气有限公司 | Dry-type transformer |
| CN103515072B (en) * | 2013-10-28 | 2016-01-27 | 三变科技股份有限公司 | A kind of two high pressure on-load voltage regulation single-phase testing transformer |
| CN105304291B (en) * | 2014-07-18 | 2017-06-16 | 扬州华鼎电器有限公司 | A kind of paper tinsel is around dry-type transformer and its production method |
| CN104979086B (en) * | 2015-07-01 | 2017-05-31 | 广东广特电气股份有限公司 | A kind of low pressure on loaded capacity-regulated transformer mixes winding structure |
| CN108109826A (en) * | 2017-12-12 | 2018-06-01 | 辽宁华冶集团发展有限公司 | A kind of mining general epoxy cast dry transformer trapezoidal coil structure |
| CN107946048A (en) * | 2017-12-31 | 2018-04-20 | 江苏天奇新能源集成有限公司 | 110kV resin casting dry-type transformers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US6147580A (en) * | 1998-12-29 | 2000-11-14 | Square D Company | Strip wound induction coil with improved heat transfer and short circuit withstandability |
| EP1635365A1 (en) * | 2004-09-09 | 2006-03-15 | Abb Research Ltd. | Dry-type encapsulated transformer coils |
| CN2888614Y (en) * | 2006-03-31 | 2007-04-11 | 江苏华鹏变压器有限公司 | Epoxy-resin filled dry transformer coil |
| CN201051439Y (en) * | 2007-05-14 | 2008-04-23 | 沈阳昊诚电气有限公司 | Epoxy casting dry transformer |
-
2007
- 2007-05-14 CN CN2007100112863A patent/CN101308721B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US6147580A (en) * | 1998-12-29 | 2000-11-14 | Square D Company | Strip wound induction coil with improved heat transfer and short circuit withstandability |
| EP1635365A1 (en) * | 2004-09-09 | 2006-03-15 | Abb Research Ltd. | Dry-type encapsulated transformer coils |
| CN2888614Y (en) * | 2006-03-31 | 2007-04-11 | 江苏华鹏变压器有限公司 | Epoxy-resin filled dry transformer coil |
| CN201051439Y (en) * | 2007-05-14 | 2008-04-23 | 沈阳昊诚电气有限公司 | Epoxy casting dry transformer |
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| Publication number | Publication date |
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| CN101308721A (en) | 2008-11-19 |
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Owner name: SHENYANG HAOCEN ELECTRIC CO., LTD. Free format text: FORMER OWNER: SHENYANG HAOCHENG ELECTRICAL EQUIPMENT CO., LTD. Effective date: 20101207 |
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Effective date of registration: 20101207 Address after: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee after: Shenyang Haocheng Electric Co., Ltd. Address before: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee before: Shenyang Haocheng Electrical Equipment Co., Ltd. |
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Address after: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee after: Shenyang Haocheng Electrical Equipment Co., Ltd. Address before: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee before: Shenyang Haocheng Electric Co., Ltd. |
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Granted publication date: 20100908 Termination date: 20210514 |
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