CN2777722Y - Non-local discharge press block for air immersed transformer - Google Patents
Non-local discharge press block for air immersed transformer Download PDFInfo
- Publication number
- CN2777722Y CN2777722Y CN 200520111424 CN200520111424U CN2777722Y CN 2777722 Y CN2777722 Y CN 2777722Y CN 200520111424 CN200520111424 CN 200520111424 CN 200520111424 U CN200520111424 U CN 200520111424U CN 2777722 Y CN2777722 Y CN 2777722Y
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- CN
- China
- Prior art keywords
- counterbore
- utility
- model
- local discharge
- immersed transformer
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- Expired - Lifetime
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Abstract
The utility model relates to a non-local discharge press block for an air immersed transformer, which is arranged at two ends of an original auxiliary electromagnetic winding in an air immersed transformer, and the electromagnetic winding is clamped, pressed and positioned by the utility model. The non-local discharge press block for an air immersed transformer comprises a press block main body, wherein the press block main body is made from insulating materials; the back surface of the utility model, which is matched with a press nail, is provided with a counterbore. A shielded counterbore sleeve is inosculated with and inserted in the counterbore. The shielded counterbore sleeve is inserted in the original counterbore by the utility model, so the shielded counterbore sleeve is fastened with metals on the press nail after the utility model is assembled on the air immersed transformer; the periphery of the space in the counterbore is integrally surrounded into a shielded cavity, and air gaps in the counterbore form a space with magnetic field intensity which is approximate to zero, so the utility model solves the problem existing in the existing press blocks of local discharge. The qualification rate in product inspection is greatly enhanced by that the problem of the section of the local discharge is solved, and the utility model offers a rapid method to further inspect and solve the problems of unqualified products, so the production efficiency is enhanced and the production cost is lowered.
Description
Technical field
The utility model relates to and places former secondary electromagnetism winding two ends that the electromagnetism winding is blocked in a kind of dry-type transformer to press and the briquetting of location, and relating in particular to a kind of dry-type transformer does not have office and put briquetting.
Background technology
The used cushion block of existing dry-type transformer mostly is SMC or the compacting of DMC material monolithic forms; the body of this briquetting and the one side (back side) of pressing nail to cooperate are suppressed with and are used to the counterbore of pressing the ailing head to stretch into; in actual applications; when dry-type transformer is carried out flash test; put (partial discharge) phenomenon through generation office of regular meeting; through investigating repeatedly; finding has more than 80 percent to go out in the counterbore of briquetting in the fault point, and the air in the counterbore under high pressure ionization takes place and partial discharge phenomenon occurs.Why this situation appears; be because electric winding and press to follow closely () between add after the strong-electromagnetic field; because the difference that exists between the dielectric constant of the dielectric constant of air and the insulating material of briquetting; most of magnetic field intensity is added on the interior air air gap of counterbore; often can build up fines or dust in the counterbore in addition, thereby cause the partial discharge in the counterbore.This office puts and can make testing crew can't accurately judge the position of fault point, thereby can't to distinguish be that electromagnetism winding failure office releases be the ionic discharge at briquetting place, brings very big inconvenience to quality inspection work.
The utility model content
At the problems referred to above, the purpose of this utility model is to provide a kind of dry-type transformer not have office and puts briquetting, presses the partial discharge phenomenon at nail place to eliminate briquetting.
For achieving the above object, the technical solution of the utility model is to adopt a kind of dry-type transformer to put briquetting with no office, comprise the briquetting body made from insulating material, briquetting is provided with counterbore with the back side of pressing nail to cooperate, and coincide in the described counterbore to be embedded with a shielding counterbore cover.
Described shielding counterbore cover is steel counterbore cover.
Because briquetting of the present utility model is setting-in shielding counterbore cover in original counterbore, after making that this briquetting is assemblied on the dry-type transformer, the metal gasket that this shielding counterbore cover and pressure nail on fastens, a shielding cavity will be formed on the whole around the space in the counterbore, make that the air air gap forms approximate zero magnetic field intensity space in the counterbore, thereby problem is put in the office that has solved existing briquetting place.The solution of link problem is put in this innings, makes that the qualification rate in the examination and test of products greatly improves, and provides means efficiently to the problem of further investigating thoroughly of defective item with dealing with problems, and has improved production efficiency greatly, has reduced production cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is applied to scheme of installation in the dry-type transformer for the utility model.
Embodiment
It is a kind of exemplary embodiment of the present utility model that Fig. 1, dry-type transformer shown in Figure 2 are put briquetting with no office, briquetting body 2 usefulness insulating material are made, briquetting 2 is provided with counterbore with pressing nail 4 back sides that cooperate, and the core of the technical solution of the utility model is the identical shielding counterbore cover 1 that is embedded with in described counterbore.Shielding counterbore cover 1 is a steel counterbore cover.This briquetting 2 compresses by folder 3, pressure nail 4 high-tension coils 7 with dry-type transformer, low-voltage coil 6.After this briquetting is assemblied on the dry-type transformer, metal gasket 5 on this shielding counterbore cover 1 and the pressure nail 4 fastens, to form a shielding cavity around the space in the counterbore on the whole, make that the air air gap forms approximate zero magnetic field intensity space in the counterbore, thereby problem is put in the office that has solved existing briquetting place.
Claims (2)
1, a kind of dry-type transformer does not have office and puts briquetting, comprises the briquetting body made from insulating material, and briquetting is provided with counterbore with the back side of pressing nail to cooperate, it is characterized in that: identically in the described counterbore be embedded with one and shield the counterbore cover.
2, dry-type transformer according to claim 1 does not have office and puts briquetting, and it is characterized in that: described shielding counterbore cover is steel counterbore cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520111424 CN2777722Y (en) | 2005-03-16 | 2005-06-14 | Non-local discharge press block for air immersed transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520030202.7 | 2005-03-16 | ||
| CN200520030202 | 2005-03-16 | ||
| CN 200520111424 CN2777722Y (en) | 2005-03-16 | 2005-06-14 | Non-local discharge press block for air immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2777722Y true CN2777722Y (en) | 2006-05-03 |
Family
ID=36745099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520111424 Expired - Lifetime CN2777722Y (en) | 2005-03-16 | 2005-06-14 | Non-local discharge press block for air immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2777722Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623151A (en) * | 2011-01-30 | 2012-08-01 | 张家港市沙洲特种变压器制造有限公司 | Stable compressed structure for reducing partial electrical discharge of dry type transformer |
| CN109378196A (en) * | 2018-12-10 | 2019-02-22 | 镇江天力变压器有限公司 | A kind of New insulated cushion block |
| CN109903973A (en) * | 2019-04-23 | 2019-06-18 | 辽宁易发式电气设备有限公司 | A kind of power transformer assembled iron nail pressing |
-
2005
- 2005-06-14 CN CN 200520111424 patent/CN2777722Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623151A (en) * | 2011-01-30 | 2012-08-01 | 张家港市沙洲特种变压器制造有限公司 | Stable compressed structure for reducing partial electrical discharge of dry type transformer |
| CN109378196A (en) * | 2018-12-10 | 2019-02-22 | 镇江天力变压器有限公司 | A kind of New insulated cushion block |
| CN109903973A (en) * | 2019-04-23 | 2019-06-18 | 辽宁易发式电气设备有限公司 | A kind of power transformer assembled iron nail pressing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150614 Granted publication date: 20060503 |