CN106531419B - 35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid - Google Patents
35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid Download PDFInfo
- Publication number
- CN106531419B CN106531419B CN201611140168.8A CN201611140168A CN106531419B CN 106531419 B CN106531419 B CN 106531419B CN 201611140168 A CN201611140168 A CN 201611140168A CN 106531419 B CN106531419 B CN 106531419B
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- China
- Prior art keywords
- grid
- grades
- type transformer
- transformer high
- coil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention discloses a kind of grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils；Multistage coiling including arranged in co-axial alignment is separated by grid cushion between adjacent two sections of coilings, and coiling and grid cushion are integrated by poured with epoxy resin；The grid cushion is overlapped to form by the solvent-free fiberglass gridding cloth of multilayer；35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid of the present invention, improve the mechanical strength of entire coil, coil is avoided during die-filling, epimere is slipped to hypomere, the problem of causing turn-to-turn short circuit, improves the ability of the anti-sudden short circuit of coil, considerably increase the safety coefficient of transformer in use, the economic and practical of transformer is improved, reduces the cost of enterprise, improves the economic benefit of enterprise.
Description
Technical field
The present invention relates to technical field of transformer manufacturing, and in particular to a kind of grid 35KV grades of epoxy resin pouring dry types become
Depressor high-tension coil.
Background technology
Existing this kind of technology mainly adds fiberglass gridding cloth in winding mould inner wall, then starts around copper wire, segmentation
Drum type brake, after complete again plus layer of glass grid cloth.In coiling, need to pad grid when every section of high pressure circular copper wire rises layer
Cloth (a kind of insulating materials inside transformer high-voltage coil), this liter layer mode, due to easy between grid cloth and circular copper wire
It skids, the grid cloth for rising layer easily slides, is not easy to find in winding process, also easily because dropping during die-filling tool.
There is no grid cloth between every layer, there is no thing support between every section, in dress mold process or transport process, be easy to cause section
Between slide, when die-filling tool, can not be known, be easy to cause transformer high-voltage coil and burn.With cannot be mutual between grid cloth between interval
It overlaps and has certain space, circle is be easy to cause because not having grid cloth between every layer inside high-tension coil after resin-cast shaping
Between short circuit.Head and the tail section is not strengthened insulation and is easily burnt since voltage is very high.Due to no grid cloth, coil is substantially reduced
Overall mechanical strength, coil caused by huge electric power when be easy to causeing coil sudden short circuit is outer and internal insulating layer cracks,
Hidden danger is left during transformer use.
The content of the invention
In view of this, the object of the present invention is to provide a kind of grid 35KV grades of Cast Resin Dry-Type Transformer high-voltage lines
Circle, improves the mechanical strength of entire coil, avoids coil during die-filling, epimere is slipped to hypomere, causes turn-to-turn short
The problem of road, improves the ability of the anti-sudden short circuit of coil.
35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid of the present invention；Multistage including arranged in co-axial alignment around
Coil processed is separated by grid cushion between adjacent two sections of coilings, and coiling and grid cushion are integrated by poured with epoxy resin；
The grid cushion is overlapped to form by the solvent-free fiberglass gridding cloth of multilayer.
Further, separated between every layer line circle of the coiling using solvent-free fiberglass gridding cloth.
Further, at least outermost coil positioned at two sections of coilings at head and the tail both ends uses glass fiber membrane glue
Band package.
Further, the grid cushion utilizes the solvent-free fiberglass gridding cloth of tailing, is cut into rectangle, further according to
Width between adjacent two sections of coilings builds up cuboid, is finally wrapped up with glass fiber membrane adhesive tape.
Further, by the moulding by casting in mold, two layers of solvent-free glass fibers is enclosed along die inside wall when assembling mold
Tie up grid cloth.
Further, the mold hoisting assembled is on trolley and promotes curing stove heat, and heating temperature is 100 DEG C -140 DEG C,
When heat preservation 3-7 is small.
The beneficial effects of the invention are as follows：35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid of the present invention,
The mechanical strength of entire coil is improved, avoids coil during die-filling, epimere is slipped to hypomere, causes turn-to-turn short circuit
Problem improves the ability of the anti-sudden short circuit of coil, considerably increases the safety coefficient of transformer in use, improves
The economic and practical of transformer reduces the cost of enterprise, improves the economic benefit of enterprise.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In attached drawing, each element or part are not
Centainly drawn according to actual ratio.
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with attached drawing.Following embodiment is only used for
Clearly illustrate technical scheme, therefore be only used as example, and the protection model of the present invention cannot be limited with this
It encloses.
Fig. 1 is the structural diagram of the present invention, as shown in the figure：35KV grades of epoxy resin pouring dry types of grid of the present embodiment
Transformer high-voltage coil；Multistage coiling 1 including arranged in co-axial alignment is divided by grid cushion 2 between adjacent two sections of coilings 1
Every coiling 1 and grid cushion 2 are integrated by poured with epoxy resin；The grid cushion 2 is by the solvent-free fiberglass gridding of multilayer
Cloth overlaps to form；Separated between every layer line circle of the coiling 1 using solvent-free fiberglass gridding cloth 3；Positioned at head and the tail
At least outermost coil of two sections of coilings 1 at both ends is wrapped up using glass fiber membrane adhesive tape；The grid cushion 2 utilizes
The solvent-free fiberglass gridding cloth of tailing, is cut into rectangle, is folded further according to the width between adjacent two sections of coilings 1
Into cuboid, finally wrapped up with glass fiber membrane adhesive tape；35KV grades of poured with epoxy resin of grid of the present embodiment are done
Formula transformer high-voltage coil encloses two layers of solvent-free glass when assembling mold 4 by the moulding by casting in mold 4 along 4 madial wall of mold
Glass fibrous mesh cloth 5；The mold 4 assembled is hung on trolley and promotes curing stove heat, and heating temperature is 100 DEG C -140 DEG C,
When heat preservation 3-7 is small；Every section of coil by the solvent-free fiberglass gridding cloth of tailing, is cut into rectangle, according to section after complete
Between width, then build up cuboid, wrapped, padded between every section with glass fiber membrane adhesive tape, spacing 100 or so, and secured,
It cannot loosen；Then periphery is one 0.5 thick again and one 1.7 thick solvent-free fiberglass gridding cloth ties up, and fortune is gone die-filling.
Coil pouring technology flow：(1), material therefor, releasing agent, mold, epoxy resin, glass cement etc., cast is set
It is standby：Vacuum pressure casting equipment, gel solidification stove etc..(2), preparation：1st, it is the coil of the casting mold assembled is uniform
It is hung on trolley, promotes and cure stove heat.2nd, preheating temperature is set as 100 DEG C -140 DEG C, and it is small that coil keeps the temperature 3-7 in curing oven
When.(3), coil is poured into a mould：(1), the mould trolley of the good belt coil of drying process is pushed into pouring can, by each cast pipe tap
The upper end of coil is distributed in, tightens and fixes.(2), observation window is cleaned.(3) tank door is closed, is heated, vacuumized.(4), it is true
When sky is evacuated to below 100Pa, when holding 2 is small.(5), when the resin vacuum of mixing tank is evacuated to below 200Pa, when keeping 1-2 small
(6), open in cast initial approach to become a Buddhist believer cast (7), casting process, observe the charging situation at sprue gate, treat that mold upper end has material to expose
18mm stops charging.(8), in casting process, observe each mold whether there is leak case, cast is completed in no leakage.(9), pour into a mould
After finishing, vacuum-pumping valve, vacuum pump etc. are closed, (10) release vacuum, open pouring can door, promote trolley cure immediately
Stove is cured.75~80 DEG C of temperature setting, when constant temperature holding 6 is small, 85~95 DEG C, when constant temperature holding 4 is small, 125~130 DEG C,
When constant temperature holding 8 is small.(11), when the coil after curing naturally cools to less than 80 DEG C with furnace temperature, demoulded.The present invention around
The interlayer of coil 1 processed increases solvent-free fiberglass gridding cloth, enhances the dielectric strength of interlayer, reduces the machine of turn-to-turn short circuit
Rate.In the intersegmental grid cushion 2 for adding solvent-free fiberglass gridding cloth and building up, and one is firmly bonded to resin-cast
It rises, substantially increases the mechanical strength of entire coil, avoid intersegmental since light is resin, there is lacking for contraction after intersegmental cast
It falls into, after cast, coil outer surface flat smooth does not see intersegmental trace.Mainly coil is that of avoiding during die-filling, on
Section is slipped to hypomere, causes the probability of turn-to-turn short circuit.The solvent-free fiberglass gridding cloth of tailing is make use of, reduces tree
The dosage of fat, in two sections of head and the tail, the number of turn high to voltage has carried out half-stack package processing, further with glass fiber membrane adhesive tape
The ability of insulation is enhanced, improves the ability of the anti-sudden short circuit of coil.Considerably increase the peace of transformer in use
Overall coefficient improves the economic and practical of transformer, reduces the cost of enterprise, improves the business efficiency of enterprise.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is not made to depart from various embodiments of the present invention technology
The scope of scheme should all cover among the claim of the present invention and the scope of specification.
Claims (5)
1. a kind of grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils, it is characterised in that：Including arranged in co-axial alignment
Multistage coiling is separated by grid cushion between adjacent two sections of coilings, and coiling and grid cushion are by poured with epoxy resin
It is integrated；The grid cushion is overlapped to form by the solvent-free fiberglass gridding cloth of multilayer；The grid cushion utilizes tailing
Solvent-free fiberglass gridding cloth, is cut into rectangle, and cuboid is built up further according to the width between adjacent two sections of coilings,
Finally wrapped up with glass fiber membrane adhesive tape.
2. grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils according to claim 1, it is characterised in that：
Separated between every layer line circle of the coiling using solvent-free fiberglass gridding cloth.
3. grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils according to claim 1, it is characterised in that：
At least outermost coil positioned at two sections of coilings at head and the tail both ends is wrapped up using glass fiber membrane adhesive tape.
4. grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils according to claim 1, it is characterised in that：
By the moulding by casting in mold, two layers of solvent-free fiberglass gridding cloth is enclosed along die inside wall when assembling mold.
5. grid 35KV grades of Cast Resin Dry-Type Transformer high-tension coils according to claim 1, it is characterised in that：
The coil of the casting mold assembled is hung on trolley and promotes curing stove heat, and heating temperature is 100 DEG C -140 DEG C, keeps the temperature 3-
7 it is small when.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140168.8A CN106531419B (en) | 2016-12-12 | 2016-12-12 | 35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140168.8A CN106531419B (en) | 2016-12-12 | 2016-12-12 | 35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106531419A CN106531419A (en) | 2017-03-22 |
| CN106531419B true CN106531419B (en) | 2018-05-25 |
Family
ID=58343104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611140168.8A Expired - Fee Related CN106531419B (en) | 2016-12-12 | 2016-12-12 | 35KV grades of Cast Resin Dry-Type Transformer high-tension coils of grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106531419B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368143Y (en) * | 1998-03-06 | 2000-03-08 | 天津丰阳高新技术公司 | Thin-layer resin insulation dry power transformer |
| CN201622915U (en) * | 2009-12-18 | 2010-11-03 | 沈阳全密封变压器股份有限公司 | Three-phase thin insulation epoxy-casting dry transformer |
| CN201975238U (en) * | 2011-01-19 | 2011-09-14 | 江苏宝亨新电气有限公司 | Outer encapsulating insulation structure for transformer coil |
| CN202120728U (en) * | 2011-06-22 | 2012-01-18 | 扬州华鼎电器有限公司 | High-temperature resistant flame-retardant epoxy cast dry type transformer |
| CN203760289U (en) * | 2014-04-14 | 2014-08-06 | 南通龙翔电器设备有限公司 | Cushion block structure between high voltage coil segments of dry-type transformer |
| CN204117810U (en) * | 2014-10-20 | 2015-01-21 | 深圳勃格变压器有限公司 | The dry transformer high-tension coil of high-insulativity high mechanical properties |
| CN204946676U (en) * | 2014-12-01 | 2016-01-06 | 成都瑞烨变压器有限公司 | The transformer of Novel fastening structure |
-
2016
- 2016-12-12 CN CN201611140168.8A patent/CN106531419B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106531419A (en) | 2017-03-22 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180525 Termination date: 20181212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |