CN102288885A - Internal fault detection window of transformer - Google Patents
Internal fault detection window of transformer Download PDFInfo
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- CN102288885A CN102288885A CN2011101276034A CN201110127603A CN102288885A CN 102288885 A CN102288885 A CN 102288885A CN 2011101276034 A CN2011101276034 A CN 2011101276034A CN 201110127603 A CN201110127603 A CN 201110127603A CN 102288885 A CN102288885 A CN 102288885A
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- flange
- cup
- oil tank
- transformer
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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 that the partial discharges fault of transformer inside is surveyed of being used for, belong to the detection technique field.
Background technology
Power transformer adopts the oil immersed type composite insulation structure usually, and along with power system development, electric pressure improves constantly, and shelf depreciation has become the main cause of electric power transformer insulated deterioration.Therefore, it is significant to the safe and stable operation of guaranteeing power equipment effectively to detect partial discharges fault.
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 subjected to external interference easily and sensitivity is lower; There is very big time delay in vapor-phase chromatography, can not reflect catastrophic discontinuityfailure; The uhf electromagnetic wave that the ultrahigh frequency method produces by the inner shelf depreciation of receiving transformer is realized the detection of shelf depreciation.Ultrahigh frequency detection method detection frequency band commonly used is 500-1500MHz, and on-site noise is usually less than 400MHz, thereby can avoid well disturbing, and owing to detect bandwidth, sensitivity is also than other method height.In addition, different with other method, the discharge pulse waveform of the more approaching reality of waveform that the ultrahigh frequency method records can be studied the essential characteristic of the inner shelf depreciation of transformer more all sidedly.But owing to the shielding action of transformer-cabinet to uhf electromagnetic wave, the 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 power transformer interior fault detection window 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 power transformer interior fault detection window, comprise fuel tank reservation flange in the formation, ring-type outside flange and cup-shaped forms, described fuel tank is reserved flange and is fixed on the outer wall of oil tank of transformer, and its center pit is relative with the fault finding hole on being arranged on the transformer oil tank wall, the center bore of the external diameter of described cup-shaped forms and fuel tank reservation flange is complementary and rim of a cup is provided with outside flange, the center pit that flange is reserved through fuel tank in its bottom stretches in the oil tank of transformer, described ring-type outside flange reserves by bolt and fuel tank that flange is coaxial to be connected, and its one side relative with fuel tank reservation flange is provided with the corresponding groove of rim of a cup flange with the cup-shaped forms.
Above-mentioned power transformer interior fault detection window is provided with the sealing plain cushion between the rim of a cup flange of fuel tank reservation flange and cup-shaped forms.
Above-mentioned power transformer interior fault detection window, the center pit of ring-type outside flange is provided with protecting cover, and described protecting cover is connected with the ring-type outside flange by bolt.
Above-mentioned power transformer interior fault detection window, described cup-shaped forms are transparent goblet.
The present invention utilizes the cup-shaped forms to constitute the detection cavity that stretches into oil tank of transformer inside, be not subjected to the shielding of external interference and oil tank wall during the uhf sensor uhf electromagnetic wave that shelf depreciation produces in the receiving transformer in this detection cavity, thereby have very high sensitivity.Between cup-shaped forms and fuel tank reservation flange, the seepage that the sealing plain cushion can prevent transformer oil is set, guarantees the sealing of detection window.Protecting cover on the ring-type outside flange is used to shield the interference of external signal, also has dustproof, waterproof and protective effect simultaneously.The cup-shaped forms adopt transparent material to make, and are convenient to Direct observation, take the transformer inner case, make failure message more intuitive and reliable.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.
Each label is among the figure: 1, fuel tank is reserved flange; 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 made up of fuel tank reservation flange 1, 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, utilizing fastening bolt that ring-type outside flange 2 and fuel tank are reserved flange 1 links together, sealing plain cushion 5 is installed between the rim of a cup flange of fuel tank reservation flange 1 and ring-type outside flange 2 and cup-shaped forms 3, is prevented leakage of oil between ring-type outside flange 2 and the fuel tank reservation flange 1, oil impregnate; Simultaneously also prevent oil seepage in cup-shaped forms 3, guarantee positive confinement.Utilize fastening bolt that protecting cover 4 is fixed on the 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 the 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 installed in charged for replacement, maintenances at any time such as its inner transformer partial discharge monitoring sensor, monitoring arrangement.
Claims (4)
1. power transformer interior fault detection window, it is characterized in that, it comprises fuel tank reservation 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 its center pit is relative with the fault finding hole on being arranged on transformer oil tank wall (6), the center bore of the external diameter of described cup-shaped forms (3) and fuel tank reservation flange (1) is complementary and rim of a cup is provided with outside flange, the center pit that flange (1) is reserved through fuel tank in its bottom stretches in the oil tank of transformer, described ring-type outside flange (2) is reserved coaxial connection of flange (1) by bolt with fuel tank, and its one side relative with fuel tank reservation flange (1) is provided with the corresponding groove of rim of a cup flange with cup-shaped forms (3).
2. according to the described power transformer interior fault detection window of claim 1, it is characterized in that, between the rim of a cup flange of fuel tank reservation flange (1) and cup-shaped forms (3), be provided with sealing plain cushion (5).
3. according to claim 1 or 2 described power transformer interior fault detection window, it is characterized in that the center pit of ring-type outside flange (2) is provided with protecting cover (4), described protecting cover (4) is connected with ring-type outside flange (2) by bolt.
4. according to the described power transformer interior fault detection window of claim 3, it is characterized in that 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.X | 2010-12-31 | ||
| CN201010618498 | 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 true CN102288885A (en) | 2011-12-21 |
| CN102288885B 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) |
Cited By (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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102288885B (en) | 2014-02-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20170517 |