CN102288885B - Internal fault detection window of transformer - Google Patents
Internal fault detection window of transformer Download PDFInfo
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- CN102288885B CN102288885B CN201110127603.4A CN201110127603A CN102288885B CN 102288885 B CN102288885 B CN 102288885B CN 201110127603 A CN201110127603 A CN 201110127603A CN 102288885 B CN102288885 B CN 102288885B
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- flange
- cup
- transformer
- oil tank
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Abstract
The invention relates to an internal fault detection window of a transformer, which comprises a reserved oil tank flange, a ring-shaped outer flange and a cup-shaped window body. The reserved oil tank flange is fixed on the outer wall of a transformer oil tank, the central hole of the reserved oil tank flange is arranged opposite to a fault detection hole on the wall of the transformer oil tank, the outside diameter of the cup-shaped window body is matched with the diameter of the central hole of the reserved oil tank flange, a cup opening is provided with an outward flange, the bottom of the cup-shaped window body extends into the transformer oil tank through the central hole of the reserved oil tank flange, the ring-shaped outer flange is coaxially connected with the reserved oil tank flange through a bolt, and the surface of the ring-shaped outer flange opposite to the reserved oil tank flange is provided with a groove corresponding to the flange of the cup opening of the cup-shaped window body. A detection chamber extending into the transformer oil tank is formed through the cup-shaped window body. When an ultra-high-frequency sensor receives ultra-high-frequency electromagnetic waves produced due to partial discharge in the transformer through the detection chamber, the external interference and the shielding of the wall of the oil tank can be avoided, and the internal fault detection window has high sensitivity.
Description
Technical field
The present invention relates to a kind of detection window for the partial discharges fault of transformer inside is surveyed, belong to detection technique field.
Background technology
Power transformer adopts oil immersed type composite insulation structure conventionally, and along with the development of electric system, electric pressure improves constantly, and shelf depreciation has become electric power transformer insulated deteriorated main cause.Therefore, effectively detect partial discharges fault significant to guaranteeing the safe and stable operation of power equipment.
At present, the detection method of shelf depreciation mainly contains pulse current method, supercritical ultrasonics technology, vapor-phase chromatography and ultrahigh frequency method.Pulse current method and supercritical ultrasonics technology are easily subject to external interference and sensitivity is lower; There is very large time delay in vapor-phase chromatography, can not reflect catastrophic discontinuityfailure; The uhf electromagnetic wave that ultrahigh frequency method produces by the inner shelf depreciation of receiving transformer is realized the detection of shelf depreciation.The conventional measurement bandwidth of ultrahigh frequency detection method is 500-1500MHz, and on-site noise is usually less than 400MHz, thereby avoid interference well, and because measurement bandwidth is wide, sensitivity is also high than other method.In addition, different from other method, the Discharge pulse waveform of the more approaching reality of waveform that ultrahigh frequency method records, can study the essential characteristic of the inner shelf depreciation of transformer more all sidedly.But due to the shielding action of transformer-cabinet to uhf electromagnetic wave, ultrahigh frequency method can't obtain desirable detection sensitivity at present.Therefore, how to overcome the shielding of transformer-cabinet, the detection sensitivity that the uhf electromagnetic wave of generation is put in raising office becomes the relevant technologies personnel emphasis of research at present.
Summary of the invention
The object of the present invention is to provide a kind ofly can effectively overcome the shielding of transformer-cabinet to uhf electromagnetic wave, the internal fault detection window of transformer that detection sensitivity significantly improves is put in the office of making.
Problem of the present invention realizes with following technical proposals:
A kind of internal fault detection window of transformer, formation comprises that fuel tank reserves flange, ring-type outside flange and cup-shaped forms, the reserved flange of described fuel tank is fixed on the outer wall of oil tank of transformer, and its center pit is relative with the fault finding hole being arranged on transformer oil tank wall, the center bore of the reserved flange of the external diameter of described cup-shaped forms and fuel tank matches and rim of a cup is provided with outside flange, its bottom is stretched in oil tank of transformer through the center pit of the reserved flange of fuel tank, described ring-type outside flange is connected by the reserved flange coaxial of bolt and fuel tank, in the relative one side of the reserved flange of itself and fuel tank, be provided with the groove corresponding with the rim of a cup flange of cup-shaped forms.
Above-mentioned internal fault detection window of transformer is provided with sealing plain cushion between the reserved flange of fuel tank and the rim of a cup flange of cup-shaped forms.
Above-mentioned internal fault detection window of transformer is provided with protecting cover on the center pit of ring-type outside flange, and described protecting cover is connected with ring-type outside flange by bolt.
Above-mentioned internal fault detection window of transformer, described cup-shaped forms are transparent goblet.
The present invention utilizes cup-shaped forms to form the detection cavity that stretches into oil tank of transformer inside, during the uhf sensor uhf electromagnetic wave that in receiving transformer, shelf depreciation produces in this detection cavity, be not subject to the shielding of external interference and oil tank wall, thereby there is very high sensitivity.Between cup-shaped forms and the reserved flange of fuel tank, the seepage that sealing plain cushion can prevent transformer oil is set, guarantees the sealing of detection window.Protecting cover on ring-type outside flange is for shielding the interference of external signal, also has dustproof, waterproof and protective effect simultaneously.Cup-shaped forms adopt transparent material to make, and are convenient to direct observation, take transformer inner case, make failure message more intuitive and reliable.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is structural representation of the present invention.
In figure, each label is: 1, the reserved flange of fuel tank; 2, ring-type outside flange; 3, cup-shaped forms; 4, protecting cover; 5, sealing plain cushion; 6, transformer oil tank wall; 7, transformer oil.
Embodiment
Referring to Fig. 1, the present invention is comprised of the reserved flange 1 of fuel tank, ring-type outside flange 2, sealing plain cushion 5, cup-shaped forms 3, protecting cover 4.During assembling, cup-shaped forms 3 are embedded in the groove of ring-type outside flange 2, utilize fastening bolt that the reserved flange 1 of ring-type outside flange 2 and fuel tank is linked together, between the reserved flange 1 of fuel tank and ring-type outside flange 2 and the rim of a cup flange of cup-shaped forms 3, sealing plain cushion 5 is installed, is prevented leakage of oil between the reserved flange 1 of ring-type outside flange 2 and fuel tank, oil impregnate; Also prevent that oil seepage is in cup-shaped forms 3, guarantee positive confinement simultaneously.Utilize fastening bolt that protecting cover 4 is fixed on ring-type outside flange 2, play shielding and protective action.
The material of cup-shaped forms 3 can adopt teflon, and it is not transparent, but also can select heat-resisting, corrosion-resistant, physical strength is high, the transparent material of good insulation preformance.
Cup-shaped forms 3 of the present invention are insinuated in oil tank of transformer, have solved the shielding problem of transformer-cabinet, have also got rid of external interference simultaneously, and detection sensitivity is improved greatly.This device and same life-span of transformer consubstantiality can be changed when overhaul.Be arranged on charged for replacement, the maintenances at any time such as its inner On Line PD Monitoring of Transformer sensor, monitoring arrangement.
Claims (1)
1. an internal fault detection window of transformer, it is characterized in that, it comprises that fuel tank reserves flange (1), ring-type outside flange (2) and cup-shaped forms (3), described fuel tank is reserved flange (1) and is fixed on the outer wall of oil tank of transformer, and the center pit that described fuel tank is reserved flange (1) is relative with the fault finding hole being arranged on transformer oil tank wall (6), the center bore of the reserved flange (1) of the external diameter of described cup-shaped forms (3) and fuel tank matches and rim of a cup is provided with outside rim of a cup flange, formation detection cavity in oil tank of transformer is stretched into through the center pit of the reserved flange (1) of fuel tank in the bottom of described cup-shaped forms (3), the uhf sensor uhf electromagnetic wave that in receiving transformer, shelf depreciation produces in described detection cavity, described ring-type outside flange (2) is coaxially connected by the reserved flange (1) of bolt and fuel tank, in the relative one side of the reserved flange (1) of described ring-type outside flange (2) and fuel tank, be provided with the groove corresponding with the rim of a cup flange of cup-shaped forms (3),
Between the reserved flange (1) of fuel tank and the rim of a cup flange of cup-shaped forms (3), be provided with sealing plain cushion (5);
On the center pit of ring-type outside flange (2), be provided with protecting cover (4), described protecting cover (4) is connected with ring-type outside flange (2) by bolt; Described protecting cover is for shielding the interference of external signal;
Described cup-shaped forms (3) are transparent goblet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110127603.4A CN102288885B (en) | 2010-12-31 | 2011-05-17 | Internal fault detection window of transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010618498 | 2010-12-31 | ||
| CN201010618498.X | 2010-12-31 | ||
| CN201110127603.4A CN102288885B (en) | 2010-12-31 | 2011-05-17 | Internal fault detection window of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102288885A CN102288885A (en) | 2011-12-21 |
| CN102288885B true CN102288885B (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110127603.4A Expired - Fee Related CN102288885B (en) | 2010-12-31 | 2011-05-17 | Internal fault detection window of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102288885B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540032A (en) * | 2012-02-13 | 2012-07-04 | 广东电网公司电力科学研究院 | Live testing window for partial discharge of transformer |
| CN108051710A (en) * | 2017-12-04 | 2018-05-18 | 重庆臻远电气有限公司 | In gas-insulating and fully-enclosed combined electrical apparatus can charged for replacement monitoring device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476799Y (en) * | 2001-05-17 | 2002-02-13 | 邵长青 | Multifunction pipe-type oil level gauge |
| CN2660494Y (en) * | 2003-10-13 | 2004-12-01 | 邵长青 | Multifunctional tube type oil level displaying device |
| CN2685879Y (en) * | 2003-04-19 | 2005-03-16 | 深圳奥特迅电气设备有限公司 | Signal transmitter structure for transformer gas on-line monitoring instrument |
| CN201262874Y (en) * | 2008-09-27 | 2009-06-24 | 于洪涛 | Vertical oil conservater for transformer external oil |
-
2011
- 2011-05-17 CN CN201110127603.4A patent/CN102288885B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476799Y (en) * | 2001-05-17 | 2002-02-13 | 邵长青 | Multifunction pipe-type oil level gauge |
| CN2685879Y (en) * | 2003-04-19 | 2005-03-16 | 深圳奥特迅电气设备有限公司 | Signal transmitter structure for transformer gas on-line monitoring instrument |
| CN2660494Y (en) * | 2003-10-13 | 2004-12-01 | 邵长青 | Multifunctional tube type oil level displaying device |
| CN201262874Y (en) * | 2008-09-27 | 2009-06-24 | 于洪涛 | Vertical oil conservater for transformer external oil |
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| Publication number | Publication date |
|---|---|
| CN102288885A (en) | 2011-12-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20170517 |