CN102930948B - For insulation pressure ring and the production technology thereof of super extra-high voltage transformer - Google Patents
For insulation pressure ring and the production technology thereof of super extra-high voltage transformer Download PDFInfo
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- CN102930948B CN102930948B CN201210458567.4A CN201210458567A CN102930948B CN 102930948 B CN102930948 B CN 102930948B CN 201210458567 A CN201210458567 A CN 201210458567A CN 102930948 B CN102930948 B CN 102930948B
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Abstract
The invention discloses a kind of insulation pressure ring for super extra-high voltage transformer and production technology thereof, quiet after technical process mainly comprises the preliminary working of veneer, veneer drying, pressing, pressing is put and the processing step such as processing, the production technology of the insulation pressure ring of super extra-high voltage transformer of the present invention is by the strict production process controlling insulation pressure ring, improve the quality of insulation pressure ring, improve the voltage endurance capability of insulation pressure ring, insulation ring structure is fine and close, the problems such as cracking tomography can not be there is, improve the product qualified rate of product.
Description
Technical field
The present invention relates to electrical insulations and manufacture field, particularly a kind of insulation pressure ring for super extra-high voltage transformer and production technology thereof.
Background technology
The rated voltage of common EHV transformer is all at 350KV to 500KV, and the rated voltage of extra-high voltage transformer is all at 750KV and more than 750KV.Insulation pressure ring is assemblied in the end of transformer, and therefore, the useful life impact of its insulation property on transformer is very large, and its manufacturing process is extremely important, guarantee that insulation property reach the requirement of withstand voltage of super extra-high voltage transformer.
Summary of the invention
The problem that the withstand voltage properties that the object of the invention is to exist for the existing insulation pressure ring for super extra-high voltage transformer described in background technology is lower, provides a kind of the insulation pressure ring for super extra-high voltage transformer and the production technology thereof that can solve foregoing problems.
The technical scheme realizing object of the present invention is as follows:
For a production technology for the insulation pressure ring of super extra-high voltage transformer, it comprises the steps:
Step 1, select high density cardboard and phenol glue, calliper is selected according to the thickness requirement of finished product;
Step 2, according to product size requirement, high density cardboard is cut into multiple veneer, stayed certain allowance during shearing, veneer edge can not jagged, chip, and veneer can not have the foreign matters such as dirty spot, stain;
Step 3, overlay on pallet with filler strip by spaced apart for multiple veneer, the length of filler strip is greater than the size of veneer;
Step 4, veneer is sent into vacuum tank drying together with pallet, before entering tank, temperature in vacuum tank is not higher than ambient temperature 10 DEG C, when vacuum tank is heated to 55 DEG C ~ 65 DEG C, start to vacuumize, until vacuum tank internal gas pressure is down to below 667Pa, and keep, continue to be heated to 70 DEG C ~ 80 DEG C, keep this temperature more than 14 hours, stop heating, and continue to vacuumize 120 minutes, reduce temperature in vacuum tank simultaneously, vacuum breaker, take out veneer and pallet, at this moment, the moisture of the veneer of taking-up controls below 2.0%;
Step 5, the veneer taken out are placed in dry shady and cool environment, temperature is below 55 DEG C, single veneer brush coating process must complete in 150 minutes, can not the veneer of gluing in time need with cotton additional film integral parcel, and place drier, open parcel during brush coating and carry out brush coating, after opening parcel, brush coating process also must complete in 150 minutes, as after veneer parcel, standing time, more than 6 hours, need repeat the dry run in step 4;
Step 6, the veneer stack that completed by brush coating in step 5 together, will ensure during stack that thickness balances, during stack, want interval to overturn adjustment, reduce the accumulation of Thickness variation, clamp with G-shaped clamp after stack completes, the thickness of check veneer stack back cardboard, if any deviation, needs to adjust in time;
Step 7, hot-press arrangement temperature is 60 DEG C time, cardboard good for stack in step 6 is loaded in hot-press arrangement, charging will complete within the shortest time, after charging, rapid pressure is heated, pressure increase is to 1.0MPa ~ 1.5MPa, simultaneous temperature rapidly increases to 110 DEG C ~ 120 DEG C, precompressed is carried out to product, heating, exhaust, evacuation time is determined according to laminated paper board thickness, be generally 5min ~ 30min, press plywood to precompressed terminates total time can not more than 1 hour, exhaust terminates to boost to immediately in rear 5min pressure 4MPa ~ 6MPa that product specifies, enter the heat-insulation pressure keeping stage,
Step 8, heat-insulation pressure keeping stage, product hot pressing temperature is 125 DEG C ~ 135 DEG C, according to laminated paper board thickness requirement, whether the time in heat-insulation pressure keeping stage is 30min ~ 400min, after terminating, detect glue and solidify completely, after glue solidifies completely, cool under packing state, be greater than 6 hours cooling time, when temperature is down to below 48 DEG C, laminated sheet is taken out from hot-press arrangement, after taking-up, clamped with multiple G-shaped clamp immediately, prevent it to be out of shape;
After step 9, laminated sheet take out, first under friction condition quiet put 2 ?3 days, then it is machined, make its size conforms finished size requirement, after Vehicle Processing terminates, at Vehicle Processing position paraffine, be 0.1mm ~ 0.3mm under paraffin layer thickness normal temperature, by the additional layer of plastic film of preservative film, it packed after completing.
An insulation pressure ring for the super extra-high voltage transformer produced by above-mentioned production technology, it is that the annular cardboard pressing of some layers forms, and cardboard is provided with oil hole, and oil hole is distributed on the concentric circles of different radii on annular cardboard, and the bottom of oil hole is not through.
For the ease of passing into insulating oil, the top of described oil hole is provided with the larger logical hydraulic fluid port of diameter.
In order to prevent sharp corner from puncturing, outside the both ends of the surface up and down of described insulation pressure ring inboard aperture and insulation pressure ring, up and down both ends of the surface are all provided with chamfering.
Insulation pressure ring production technology for super extra-high voltage transformer of the present invention, the whole production process of strict control, prevent the impact that metal conductive particles causes finished product insulation pressure ring, before pressing, the drying of veneer must be guaranteed, in bonding processes, guarantee that cardboard is closely linked, to guarantee after pressing that cardboard does not ftracture, not discontinue, add man-hour, also to prevent the humidity of insulation board, by strictly controlling above-mentioned technical process, the insulating board insulating properties that processing obtains obtains and significantly improves, interlayer structure is fine and close, product qualified rate is high, can not ftracture, the problems such as tomography, product quality is improved.Oil hole on insulation pressure ring is blind hole, in use, insulating oil can be made to infiltrate insulating paper, improve its insulation property.
Accompanying drawing explanation
Fig. 1 is the structural representation of insulation pressure ring;
Fig. 2 is the schematic cross-section of insulation pressure ring;
In figure, 1 is annular cardboard, and 2 is oil hole, and 3 is logical hydraulic fluid port.
Embodiment
Below in conjunction with accompanying drawing 1 and Fig. 2 embodiment, detailed illustrating is carried out to the present invention:
Embodiment 1
For a production technology for the insulation pressure ring of super extra-high voltage transformer, it comprises the steps:
Step 1, select high density cardboard and phenol glue, calliper is selected according to the thickness requirement of finished product;
Step 2, according to product size requirement, high density cardboard is cut into multiple veneer, stayed certain allowance during shearing, veneer edge can not jagged, chip, and veneer can not have the foreign matters such as dirty spot, stain;
Step 3, overlay on pallet with filler strip by spaced apart for multiple veneer, the length of filler strip is greater than the size of veneer;
Step 4, veneer is sent into vacuum tank drying together with pallet, before entering tank, temperature in vacuum tank is not higher than ambient temperature 10 DEG C, when vacuum tank is heated to 55 DEG C ~ 65 DEG C, start to vacuumize, until vacuum tank internal gas pressure is down to below 667Pa, and keep, continue to be heated to 70 DEG C ~ 80 DEG C, keep this temperature more than 14 hours, stop heating, and continue to vacuumize 120 minutes, reduce temperature in vacuum tank simultaneously, vacuum breaker, take out veneer and pallet, at this moment, the moisture of the veneer of taking-up controls below 2.0%;
Step 5, the veneer taken out are placed in dry shady and cool environment, temperature is below 55 DEG C, single veneer brush coating process must complete in 150 minutes, can not the veneer of gluing in time need with cotton additional film integral parcel, and place drier, open parcel during brush coating and carry out brush coating, after opening parcel, brush coating process also must complete in 150 minutes, as after veneer parcel, standing time, more than 6 hours, need repeat the dry run in step 4;
Step 6, the veneer stack that completed by brush coating in step 5 together, will ensure during stack that thickness balances, during stack, want interval to overturn adjustment, reduce the accumulation of Thickness variation, clamp with G-shaped clamp after stack completes, the thickness of check veneer stack back cardboard, if any deviation, needs to adjust in time;
Step 7, hot-press arrangement temperature is 60 DEG C time, cardboard good for stack in step 6 is loaded in hot-press arrangement, charging will complete within the shortest time, after charging, rapid pressure is heated, pressure increase is to 1.0MPa ~ 1.5MPa, simultaneous temperature rapidly increases to 110 DEG C ~ 120 DEG C, precompressed is carried out to product, heating, exhaust, evacuation time is determined according to laminated paper board thickness, be generally 5min ~ 30min, press plywood to precompressed terminates total time can not more than 1 hour, exhaust terminates to boost to immediately in rear 5min pressure 4MPa ~ 6MPa that product specifies, enter the heat-insulation pressure keeping stage,
Step 8, heat-insulation pressure keeping stage, product hot pressing temperature is 125 DEG C ~ 135 DEG C, according to laminated paper board thickness requirement, whether the time in heat-insulation pressure keeping stage is 30min ~ 400min, after terminating, detect glue and solidify completely, after glue solidifies completely, cool under packing state, be greater than 6 hours cooling time, when temperature is down to below 48 DEG C, laminated sheet is taken out from hot-press arrangement, after taking-up, clamped with multiple G-shaped clamp immediately, prevent it to be out of shape;
After step 9, laminated sheet take out, first under friction condition quiet put 2 ?3 days, then it is machined, make its size conforms finished size requirement, after Vehicle Processing terminates, at Vehicle Processing position paraffine, be 0.1mm ~ 0.3mm under paraffin layer thickness normal temperature, by the additional layer of plastic film of preservative film, it packed after completing.
Embodiment 2
As shown in Figures 1 and 2, a kind of insulation pressure ring of the super extra-high voltage transformer produced by above-mentioned production technology, its annular cardboard 1 pressing being some layers forms, cardboard is provided with oil hole 2, oil hole 2 is distributed on the concentric circles of different radii on annular cardboard 1, and the bottom of oil hole 2 is not through.
For the ease of passing into insulating oil, the top of described oil hole 2 is provided with the larger logical hydraulic fluid port 3 of diameter.
In order to prevent sharp corner from puncturing, outside the both ends of the surface up and down of described insulation pressure ring inboard aperture and insulation pressure ring, up and down both ends of the surface are all provided with chamfering.
Claims (4)
1., for a production technology for the insulation pressure ring of super extra-high voltage transformer, it is characterized in that: it comprises the steps:
Step 1, select high density cardboard and phenol glue, calliper is selected according to the thickness requirement of finished product;
Step 2, according to product size requirement, high density cardboard is cut into multiple veneer, stayed certain allowance during shearing, veneer edge can not jagged, chip, and veneer can not have dirty spot, stain;
Step 3, overlay on pallet with filler strip by spaced apart for multiple veneer, the length of filler strip is greater than the size of veneer;
Step 4, veneer is sent into vacuum tank drying together with pallet, before entering tank, temperature in vacuum tank is not higher than ambient temperature 10 DEG C, when vacuum tank is heated to 55 DEG C ~ 65 DEG C, start to vacuumize, until vacuum tank internal gas pressure is down to below 667Pa, and keep, continue to be heated to 70 DEG C ~ 80 DEG C, keep this temperature more than 14 hours, stop heating, and continue to vacuumize 120 minutes, reduce temperature in vacuum tank simultaneously, vacuum breaker, take out veneer and pallet, at this moment, the moisture of the veneer of taking-up controls below 2.0%;
Step 5, the veneer taken out are placed in dry shady and cool environment, temperature is below 55 DEG C, single veneer brush coating process must complete in 150 minutes, can not the veneer of gluing in time need with cotton additional film integral parcel, and place drier, open parcel during brush coating and carry out brush coating, after opening parcel, brush coating process also must complete in 150 minutes, as after veneer parcel, standing time, more than 6 hours, need repeat the dry run in step 4;
Step 6, the veneer stack that completed by brush coating in step 5 together, will ensure during stack that thickness balances, during stack, want interval to overturn adjustment, reduce the accumulation of Thickness variation, clamp with G-shaped clamp after stack completes, the thickness of check veneer stack back cardboard, if any deviation, needs to adjust in time;
Step 7, hot-press arrangement temperature is 60 DEG C time, cardboard good for stack in step 6 is loaded in hot-press arrangement, charging will complete within the shortest time, after charging, rapid pressure is heated, pressure increase is to 1.0MPa ~ 1.5MPa, simultaneous temperature rapidly increases to 110 DEG C ~ 120 DEG C, precompressed is carried out to product, heating, exhaust, evacuation time is determined according to laminated paper board thickness, for 5min ~ 30min, press plywood to precompressed terminates total time can not more than 1 hour, exhaust terminates to boost to immediately in rear 5min pressure 4MPa ~ 6MPa that product specifies, enter the heat-insulation pressure keeping stage,
Step 8, heat-insulation pressure keeping stage, product hot pressing temperature is 125 DEG C ~ 135 DEG C, according to laminated paper board thickness requirement, whether the time in heat-insulation pressure keeping stage is 30min ~ 400min, after terminating, detect glue and solidify completely, after glue solidifies completely, cool under packing state, be greater than 6 hours cooling time, when temperature is down to below 48 DEG C, laminated sheet is taken out from hot-press arrangement, after taking-up, clamped with multiple G-shaped clamp immediately, prevent it to be out of shape;
After step 9, laminated sheet take out, first under friction condition quiet put 2 ?3 days, then it is machined, make its size conforms finished size requirement, after Vehicle Processing terminates, at Vehicle Processing position paraffine, be 0.1mm ~ 0.3mm under paraffin layer thickness normal temperature, by the additional layer of plastic film of preservative film, it packed after completing.
2. the insulation pressure ring of super extra-high voltage transformer produced of the production technology by claim 1, it is characterized in that: it is that the annular cardboard pressing of some layers forms, cardboard is provided with oil hole, and oil hole is distributed on the concentric circles of different radii on annular cardboard, and the bottom of oil hole is not through.
3. insulation pressure ring according to claim 2, is characterized in that: the top of described oil hole is provided with the larger logical hydraulic fluid port of diameter.
4. insulation pressure ring according to claim 2, is characterized in that: up and down both ends of the surface are all provided with chamfering outside the both ends of the surface up and down of described insulation pressure ring inboard aperture and insulation pressure ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210458567.4A CN102930948B (en) | 2012-11-15 | 2012-11-15 | For insulation pressure ring and the production technology thereof of super extra-high voltage transformer |
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| CN201210458567.4A CN102930948B (en) | 2012-11-15 | 2012-11-15 | For insulation pressure ring and the production technology thereof of super extra-high voltage transformer |
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| CN102930948A CN102930948A (en) | 2013-02-13 |
| CN102930948B true CN102930948B (en) | 2015-10-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123861B (en) * | 2013-03-01 | 2016-04-20 | 山东达驰电气有限公司 | A kind of transformer body pressing plate treatment process |
| CN107351455B (en) * | 2017-08-25 | 2020-02-04 | 山东输变电设备有限公司 | Hot pressing method for multilayer paperboard |
| CN108735440A (en) * | 2018-07-18 | 2018-11-02 | 天威保变(合肥)变压器有限公司 | A kind of device body pressing plate increase oil guide groove |
| CN112735661B (en) * | 2020-12-16 | 2021-07-09 | 无锡市东田电缆有限公司 | New energy automobile heat dissipation charging cable |
| CN112670043A (en) * | 2020-12-28 | 2021-04-16 | 金照辉 | Extra-high voltage transformer insulation compression ring and production process and production system thereof |
| CN114566368B (en) * | 2022-02-17 | 2023-06-30 | 常州市英中电气有限公司 | Manufacturing process of insulating laminated paperboard capable of preventing cracking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308924A (en) * | 1995-12-31 | 1997-07-09 | Daewoo Electronics Co Ltd | Method and means of forming a transformer winding |
| CN101941217A (en) * | 2010-06-17 | 2011-01-12 | 扎兰屯同德木业有限责任公司 | Insulating wood laminating product and preparation method thereof |
| CN202058541U (en) * | 2011-05-04 | 2011-11-30 | 魏德曼电力绝缘科技（嘉兴）有限公司 | Compression ring for insulation of high-voltage power transformer |
| CN202307416U (en) * | 2011-09-30 | 2012-07-04 | 魏德曼电力绝缘科技（嘉兴）有限公司 | Transformer insulation compression ring |
-
2012
- 2012-11-15 CN CN201210458567.4A patent/CN102930948B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308924A (en) * | 1995-12-31 | 1997-07-09 | Daewoo Electronics Co Ltd | Method and means of forming a transformer winding |
| CN101941217A (en) * | 2010-06-17 | 2011-01-12 | 扎兰屯同德木业有限责任公司 | Insulating wood laminating product and preparation method thereof |
| CN202058541U (en) * | 2011-05-04 | 2011-11-30 | 魏德曼电力绝缘科技（嘉兴）有限公司 | Compression ring for insulation of high-voltage power transformer |
| CN202307416U (en) * | 2011-09-30 | 2012-07-04 | 魏德曼电力绝缘科技（嘉兴）有限公司 | Transformer insulation compression ring |
Non-Patent Citations (1)
| Title |
|---|
| 层压纸圈制造工艺;jsxxy126;《百度文库》;百度;20120816;第2-4点 * |
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Effective date of registration: 20170410 Address after: 213012 Jiangsu Province, the clock tower Development Zone, Changzhou Road, No. 385 Co-patentee after: China Electric Power Research Institute Patentee after: Changzhou Yingzhong Electrical Co., Ltd. Address before: 213012 Jiangsu Province, the clock tower Development Zone, Changzhou Road, No. 385 Patentee before: Changzhou Yingzhong Electrical Co., Ltd. |