CN201122498Y - Novel iron core strap locking device - Google Patents
Novel iron core strap locking device Download PDFInfo
- Publication number
- CN201122498Y CN201122498Y CNU2007200646508U CN200720064650U CN201122498Y CN 201122498 Y CN201122498 Y CN 201122498Y CN U2007200646508 U CNU2007200646508 U CN U2007200646508U CN 200720064650 U CN200720064650 U CN 200720064650U CN 201122498 Y CN201122498 Y CN 201122498Y
- Authority
- CN
- China
- Prior art keywords
- drawstring
- locking device
- web
- pulling strip
- iron core
- Prior art date
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a novel iron core pulling strip locking device. A groove is arranged at the position of the iron core pulling strip of an iron core clamping piece web, the pulling strip locking device is positioned in the groove of the clamping piece web and shielded by the clamping piece web, the pulling strip and the pulling strip locking device are isolated with the clamping piece web and earthed through an earth connection, to avoid static discharge and eliminating ring current, and the locking nut is a semi-circle shaped purpose-made nut. The improvement ensures the pulling strip locking device to be only fifty millimeters higher than the web so that sharp corners are prevented from existing, the isolation distance is increased, the field intensity is improved, the partial discharge is lowered, moreover, the iron core pulling strip locking device has the advantages of simple structure, easy processing, material saving and good safety performance.
Description
Technical field
The utility model relates to a kind of power transformer, is specifically related to a kind of novel drawstring locking device unshakable in one's determination, is applicable to 500KV and above power transformer.
Background technology
At present, homemade 500kV power transformer, along with the progressively accumulation of experience and the introduction of foreign-made technology, aspect structure and the performance parameter significant progress is being arranged, a large amount of scientific researches have been carried out around problems such as 500kV transformer Electric Field Distribution, wave process, partial discharge, turn insulation, stray field, temperature rise and short-circuit strengths, be aided with computer CAD design, progressively the advanced foreign technology with every achievement in research and introduction has been applied in the product.Along with development of electric power industry, power transformer is just towards superhigh pressure, ultra high voltage, big capacity, energy-saving, low noise, fire-proof and explosion-proof type, the development of high reliability aspect, optimize structure, particularly improve high voltage position Electric Field Distribution, the important topic that insulation distance becomes design of transformer is put, rationally reduced in reduction office.The original drawstring locking device of Cai Yonging, outstanding core clamping web is too many, make the Electric Field Distribution of outlet more inhomogeneous, in order to improve field intensity, reduce partial discharge, must increase the insulation distance of high-voltage terminal, need to add the large tank size for this reason, increase hauled weight and transportation volume locking device.
Summary of the invention
Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists, and a kind of processing simple in structure, easy, material saving are provided, effectively improve Electric Field Distribution, reduction office and put, reduce insulation distance, drawstring locking device novel unshakable in one's determination that security performance is good.
The technical solution adopted in the utility model is: with the core clamping web in drawstring unshakable in one's determination place's recessing, the drawstring locking device is in the groove of folder web, and shielded by the folder web, the drawstring locking device comprises earth connection, locking nut, the dish spring, plain washer, the insulation cover for seat, cross-over block, the cross-over block pad is in the groove of folder web, cross-over block endoporus suit insulating base cover, drawstring passes in the insulation cover for seat, drawstring termination suit plain washer, tighten with the screwed connection of locking nut screw thread behind the dish spring, also be connected with earth connection on drawstring termination or the locking nut, drawstring and drawstring locking device and the insulation of folder web, pass through ground connection, locking nut is strained drawstring unshakable in one's determination, and locking nut is semi-circular special nut.
The utility model with the core clamping web in drawstring unshakable in one's determination place's recessing, drawstring locking device and core clamping web groove fit, the drawstring locking device is shielded by the folder web as far as possible, and make the outstanding web height of drawstring locking device little, and change the plain nut that was used for originally locking into semi-circular special nut, adopt the locking of dish spring in order to prevent nut loosening, through such improvement, the drawstring locking device only exceeds web 50mm, has avoided occurring wedge angle, and is effectively shielded by web.The utility model has reduced the height that drawstring stretches out web, and reduced the wedge angle part that the drawstring screw rod stretches out web, increased insulation distance, improved field intensity, reduced partial discharge, and make the locking device roundingization as far as possible, effectively reduce the electric field strength of high-voltage connection outlet drawstring locking device.Under the situation that does not add the large tank size, can guarantee better that the high-voltage connection outlet has enough insulation distances to the drawstring locking device like this.Therefore, the utility model has successfully solved the shortcoming of old drawstring locking device, and simple in structure, easily processing, and the material saving, security performance is good.
Description of drawings
Fig. 1 is the utility model embodiment 500KV transformer core drawstring scheme of erection
Fig. 2 is a drawstring locking device I enlarged drawing among Fig. 1
Fig. 3 is that the A of Fig. 2 is to view
Fig. 4, Fig. 5, Fig. 6 are the locking nut three-view diagram, and wherein Fig. 4 is the locking nut front view, and Fig. 5 is the locking nut end view, and Fig. 6 is the locking nut vertical view
The accompanying drawing marking explanation
1---earth connection 2---locking screw 3---spring 4---plain washer
5---insulation cover for seat 6---cross-over block 7---drawstring 8 unshakable in one's determination---drawstring locking devices
Embodiment
As seen from the figure, the utility model has comprised the earth connection 1 of drawstring locking effect, locking nut 2, butterfly spring 3, plain washer 4, insulation cover for seat 5, cross-over block 6, cross-over block 6 pads are in the groove of folder web, cross-over block 6 endoporus suit insulating bases cover 5, drawstring 7 passes in the insulation cover for seat 5, drawstring termination suit plain washer 4, tighten with locking nut 2 screw thread screwed connections dish spring 3 backs, also be connected with earth connection 1 on the locking nut 2, the drawstring locking device is strained drawstring unshakable in one's determination by locking nut 2, and the electrical steel sheet is clamped by folder, locking nut 2 electrodes are R25 faces of cylinder, the semicylinder of periphery chamfering R10 slyness, effectively improved earthy electric field, part 1-spare 6 is in the groove of folder web among the figure, substantially shielded by web, drawstring and drawstring locking device and the insulation of folder web are by earth connection 1 effective grounding, avoid drawstring and drawstring locking device static discharge, stopped drawstring and drawstring locking device and the issuable circulation of folder web.Improvement through such makes the drawstring locking device only exceed web 50mm, avoids occurring wedge angle, and is shielded effectively by web.Can guarantee better under the situation that does not add the large tank size that like this high-voltage connection outlet has enough insulation distances to the drawstring locking device.
Claims (1)
1. novel drawstring locking device unshakable in one's determination, it is characterized in that the core clamping web in drawstring unshakable in one's determination place's recessing, the drawstring locking device is in the groove of folder web, and shielded by the folder web, the drawstring locking device comprises earth connection, locking nut, the dish spring, plain washer, the insulation cover for seat, cross-over block, the cross-over block pad is in the groove of folder web, cross-over block endoporus suit insulating base cover, drawstring passes in the insulation cover for seat, drawstring termination suit plain washer, tighten with the screwed connection of locking nut screw thread behind the dish spring, also be connected with earth connection on drawstring termination or the locking nut, drawstring and drawstring locking device and the insulation of folder web, by ground connection, locking nut is strained drawstring unshakable in one's determination, and locking nut is semi-circular special nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200646508U CN201122498Y (en) | 2007-10-08 | 2007-10-08 | Novel iron core strap locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200646508U CN201122498Y (en) | 2007-10-08 | 2007-10-08 | Novel iron core strap locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122498Y true CN201122498Y (en) | 2008-09-24 |
Family
ID=40009735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200646508U Expired - Lifetime CN201122498Y (en) | 2007-10-08 | 2007-10-08 | Novel iron core strap locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122498Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360776A (en) * | 2011-08-01 | 2012-02-22 | 保定天威集团有限公司 | Nylon square pipe gasket for transformer and using method for nylon square pipe gasket |
| CN102510710A (en) * | 2011-10-25 | 2012-06-20 | 保定天威集团有限公司 | Shielding cover and method for shielding point discharge at bolt end by using shielding cover |
| CN103227042A (en) * | 2013-04-12 | 2013-07-31 | 苏州腾冉电气设备有限公司 | Shielded wire grounding structure of impregnated dry-type transformer coil |
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
-
2007
- 2007-10-08 CN CNU2007200646508U patent/CN201122498Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360776A (en) * | 2011-08-01 | 2012-02-22 | 保定天威集团有限公司 | Nylon square pipe gasket for transformer and using method for nylon square pipe gasket |
| CN102510710A (en) * | 2011-10-25 | 2012-06-20 | 保定天威集团有限公司 | Shielding cover and method for shielding point discharge at bolt end by using shielding cover |
| CN103227042A (en) * | 2013-04-12 | 2013-07-31 | 苏州腾冉电气设备有限公司 | Shielded wire grounding structure of impregnated dry-type transformer coil |
| CN103227042B (en) * | 2013-04-12 | 2017-12-22 | 苏州腾冉电气设备有限公司 | A kind of shielding line ground structure of impregnated dry-type transformer coil |
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080924 |
|
| CX01 | Expiry of patent term |