CN2501168Y - Explosion-proof device for oil immersed transformer - Google Patents
Explosion-proof device for oil immersed transformer Download PDFInfo
- Publication number
- CN2501168Y CN2501168Y CN 01267109 CN01267109U CN2501168Y CN 2501168 Y CN2501168 Y CN 2501168Y CN 01267109 CN01267109 CN 01267109 CN 01267109 U CN01267109 U CN 01267109U CN 2501168 Y CN2501168 Y CN 2501168Y
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- Prior art keywords
- oil
- explosion
- interface
- instrument transformer
- cover
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- Expired - Fee Related
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Abstract
The utility model relates to the cooling of an oil immersion transformer, which is applied in the safeguard for explosibility failure of oil storage room. The utility model includes a waterproof cover and a metal expander. The metal expander is provided with a lower interface board, an upper interface board, a sealing mechanism and a corrugated expansive tube. A platform is arranged on the upper part of the upper interface, and a hole is arranged in middle part and is matched with the sealing cover. A spring has an action on the upper surface of the sealing cover. The utility model settles the problems of small flow and unstable sealing performance of existing technique, which is characterized in simply structure and large areas extend.
Description
Technical field
The utility model relates to the cooling technology field of oil immersed type instrument transformer, is applied to its accumulator is produced the protection of explosive fault and then formation destructive power.
Background technology
Existing oil immersed type instrument transformer is subjected to the infringement of nature or electrical network itself in the operation of power networks process, superpotential phenomenon can occur inevitably.When serious, superpotential formation can cause rising in the accumulator the liquid insulating oil of cooling effect or the destruction of other insulating material.Breakdown as insulating material, form electric discharge phenomena etc.To produce huge heat this moment, because of the oil temperature sharply raises, can decomposite the material of various gaseous states.The oil immersed type instrument transformer has a ceramic shell usually, is insulator again.The insulator upper opening, interior Sheng insulating oil; Constitute the various components and parts of primary circuit and secondary circuit, just be immersed in the insulating oil as electric capacity, former auxiliary winding, iron core etc.The insulator opening part connects a metal expander, is connected with space in the insulator; It becomes corrugated tube shape, makes with thin stainless steel metal material, and its effect is under normal circumstances in order to adapt to the change in volume that insulating oil causes because of variations in temperature in the insulator.Because metal expander is by the sealing of the hermetically-sealed construction component on it, when anomaly occurring, metal expander is difficult to compensate the volume change of insulating oil by self flexible limited bulk variable quantity that changes.Constantly be converted at electric energy under the situation of heat energy, explosion phenomenon will occur.Chinese patent (patent No. is 94218225.1) discloses a kind of name and has been called " double containment of oil immersed type instrument transformer and explosion-protection equipment ", its structure is that an oil conservator is housed on the top of instrument transformer, the first road caulking gum film is pressed close to pasta, is fixed on the inwall of oil conservator with the edge of sealing ring with rubber membrane; The second road caulking gum film is fixed on the middle part inwall of oil conservator cap with a sealing ring again, and around the sealing ring and the top of cap be provided with contact pilotage, needle point is down.Its purpose is when pressure increases suddenly, first road, the second road caulking gum film are successively broken by acupuncture, and the various materials of generation pressure just can break through the sealing of two-layer caulking gum film and then in time be discharged in the airspace by the explosion-proof vent passage on the device.Its shortcoming is that the hole that is punctured is very little, thereby the flow that the various materials of generation pressure can pass through is also very little, so do not have explosion-proof effect; When not blasting, because of the variation of insulating oil volume is just in time broken through two-layer diaphragm seal, certainly will have moisture content in the air, oxide to contact with insulating oil this moment, causes the decreased performance of insulating oil, and then lead to a disaster.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of big flow, the explosion-protection equipment that is applied to the oil immersed type instrument transformer that sealing property is stable are provided.
The purpose of this utility model can reach by following proposal: a kind of explosion-protection equipment of using the oil immersed type instrument transformer, form by rain cover, metal expander.It is cylindric that rain cover becomes, nozzle down, side direction has a windowpane, is used for the oil level Warning Mark on the metal expander in the inspection section; Lower interface plate lateral border on nozzle inboard and the metal expander is connected and fixed with screw.Metal expander by the lower interface plate, go up interface and on seal cover mechanism, corrugated expansion pipe three parts form.The lower interface plate is used to connect the insulator and the rain cover of instrument transformer, make metal expander be positioned at rain cover and and insulator, rain cover be fixed together.It becomes discoideus, and there is a circular hole at the center, and the size in hole and insulator opening have equal bore; On the excircle of decentre circular hole, have some alternate small sircle holes, the area sum of each small sircle hole is not less than the area of center hole, is used for when fault occurs, and will produce the discharge of the various materials of oil immersed type instrument transformer internal pressure.Last interface left side is provided with exhaust duct, and the right side is provided with and adds oil duct, and they are equipped with vent valve and priming valve respectively; Top is a platform, center drilling, and surrounded surface is smooth, and centre bore is covered with when matching with seal cover, and both surfaces in opposite directions respectively have a corresponding semi-circular recesses; One " O " type oil-resistant seal ring is placed in one, and when being covered with, seals.Corrugated expansion pipe is a metal expander of the prior art, can stretch and can contract, to the change in volume redeeming of insulating oil.Lower interface plate, corrugated expansion pipe, last interface Combination Welding in regular turn form.The upper surface of seal cover is subjected to the effect of a stage clip, and the other end and the fixed head of stage clip fix, and fixed head is by on the last interface that is bolted to metal expander.
The utility model is compared with prior art, has following advantage:
1, in light weight, volume is little, and is simple in structure, and cost is low;
2, easy for installation, manufacturing technique requirent is not high;
3, practicality is good, but large tracts of land is promoted;
4, reduced issuable explosion hazard widely, and the economic loss that causes thus.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.1 is that the center hole 3 of lower interface plate is that the small sircle hole 5 of lower interface plate is that lower interface plate aperture 7 rain covers 9 that bolt is used when being connected with insulator are that vent valve 11 is that spring dead plate 12 is that O type oil-resistant seal ring 13 is that stage clip 15 seal covers 17 are that priming valve 19 is that corrugated expansion pipe 21 is bolts among the figure
Embodiment
In the reality, applied fasteners connects the utility model by the associated components on aperture (5) and the oil immersed type instrument transformer insulator.Opening vent valve (9) vacuumizes.At this moment, can see that corrugated expansion pipe (19) highly constantly descends, when reaching specified vacuum and spend, close vent valve (9).Open priming valve (17) then, insulating oil enters instrument transformer along pipeline.When corrugated expansion pipe (19) rises to required height, close priming valve (17) and stop to refuel.Cover rain cover (7), screw on bolt (21) and get final product.
When moving in electrical network, because of the variation of four seasons temperature, perhaps because of first and second loop release heat, the volume of insulating oil can change, because corrugated expansion pipe (19) can be flexible, can compensate corresponding volume-variation amount, so can not break down.When because reason such as overvoltage, instrument transformer inside has produced fault, and when pressure in the instrument transformer was sharply raise, corrugated expansion pipe (19) volume reached the maximum elongation amount, again redeeming.At this moment, seal cover (15) is subjected to the effect of internal pressure, promotes stage clip (13), opens rapidly.The various materials that produce pressure are just gone out rapidly, are discharged to the atmosphere from numerous small sircle holes (3) of lower interface plate.
Claims (2)
1, a kind of explosion-protection equipment that is applied to the oil immersed type instrument transformer is made up of rain cover (7), metal expander, it is characterized in that metal expander by the lower interface plate, go up interface and on seal cover (15) mechanism, corrugated expansion pipe (19) three parts form; The lower interface plate is fixing with bolt (21) in rain cover (7); Last interface left side is provided with vent valve (9), and the right side is provided with priming valve (17), and top is platform, and its central openings matches with seal cover (15); Seal cover (15) upper surface is subjected to the effect of a stage clip (13), and the other end of stage clip (13) and fixed head (11) are fixing, and fixed head (11) is by being bolted on the interface.
2, a kind of explosion-protection equipment that is applied to the oil immersed type instrument transformer according to claim 1 is characterized in that there is pair of corresponding half O connected in star on the interface platform surface with seal cover (15), and " O " type oil-resistant seal ring (12) that seals is put in the centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01267109 CN2501168Y (en) | 2001-10-21 | 2001-10-21 | Explosion-proof device for oil immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01267109 CN2501168Y (en) | 2001-10-21 | 2001-10-21 | Explosion-proof device for oil immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2501168Y true CN2501168Y (en) | 2002-07-17 |
Family
ID=33673572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01267109 Expired - Fee Related CN2501168Y (en) | 2001-10-21 | 2001-10-21 | Explosion-proof device for oil immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2501168Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157407A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Device for handling water or gas with content exceeding standards in oil of oil-immersed transformer |
| CN115020072A (en) * | 2022-06-29 | 2022-09-06 | 山东泰开互感器有限公司 | High-reliability explosion-proof oil-immersed current transformer |
-
2001
- 2001-10-21 CN CN 01267109 patent/CN2501168Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157407A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Device for handling water or gas with content exceeding standards in oil of oil-immersed transformer |
| CN115020072A (en) * | 2022-06-29 | 2022-09-06 | 山东泰开互感器有限公司 | High-reliability explosion-proof oil-immersed current transformer |
| CN115020072B (en) * | 2022-06-29 | 2023-11-03 | 山东泰开互感器有限公司 | High-reliability explosion-proof oil-immersed current transformer |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020717 Termination date: 20101021 |