CN2258651Y - Series air exhaustible box type pressure-releasing metal expanding device - Google Patents
Series air exhaustible box type pressure-releasing metal expanding device Download PDFInfo
- Publication number
- CN2258651Y CN2258651Y CN 95231959 CN95231959U CN2258651Y CN 2258651 Y CN2258651 Y CN 2258651Y CN 95231959 CN95231959 CN 95231959 CN 95231959 U CN95231959 U CN 95231959U CN 2258651 Y CN2258651 Y CN 2258651Y
- Authority
- CN
- China
- Prior art keywords
- expansion
- hole
- box
- metal
- pressure
- 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 - Fee Related
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Abstract
The utility model relates to a series air-exhaust box type pressure-releasing metal expander, which comprises a shell provided with an observation window, a pressure-releasing device, a micro positive pressure indicating mechanism, and metal expansion boxes integrally fixed by spacer rings, wherein, the pressure-releasing device, the micro positive pressure indicating mechanism, and the metal expansion boxes are arranged in the shell; the top end of the side wall of an upper box body and the bottom end of the side wall of a lower box body are provided with through holes. The metal expansion boxes are connected through the through holes by connecting pipes, the through hole of the lower box body of the metal expansion box at the bottom is connected with a communicating pipe fixed on a base plate of the shell, and the through hole of the upper box body of the metal expansion box at the top is connected with an air exhaust valve fixed on an upper clamp plate. A vacuum oil filling system with complicated operation is fundamentally cancelled, and oil can be filled without evacuation. The utility model has the advantages of labor saving and time saving, and effectively improves the air-exhaust reliability when the oil is filled.
Description
The utility model relates to a kind of safety device that is used on high-voltage closed electric current (voltage) instrument transformer, particularly a kind of just need not vacuumize can be in expander the series connection exhaust boxlike release of pressure metal expander of injection transformer oil.
Along with updating of the safety device on closed electric current (voltage) instrument transformer in high pressure and the ultrahigh voltage power system, the needs that the present inventor installs, transports according to the requirement and the equipment integral of its different applying working conditions, constantly release the boxlike release of pressure metal expander that various ways differs from one another, further improved the security reliability of pressure relief device and the sensitivity of pressure-fired indicating mechanism.Expansion of metal box in the existing boxlike release of pressure metal expander all thereon box side wall weld little connecting leg, utilize spacer ring that a plurality of expansion of metal boxes are loaded into one again, and each little connecting leg be communicated with by big connecting leg.Big connecting leg is provided with the vacuum impregnating fuel tap topmost, so that before oiling the air in the expansion box is got rid of, makes it to become vacuum state, thereby increases the dischargeable capacity of expansion box.In case the boxlike release of pressure metal expander operate miss of this structure or fail before oiling, to close the vacuum impregnating fuel tap, transformer oil may enter vacuum pump, if the event crack appears in vacuum system, the interior air of box is arranged not to the utmost or air is reentered in the box, all will influence the serviceability of expansion box.Therefore, the structure of existing boxlike release of pressure metal expander is still waited to improve.
The purpose of this utility model provides a kind of series connection exhaust boxlike release of pressure metal expander, has fundamentally cancelled the vacuum oil system of complicated operation, need not vacuumize to get final product direct oiling, the reliability of saving of labor, exhaust when having saved time, effectively having improved its oiling.
The purpose of this utility model is such realization: this device comprises the housing that has observation window and assembles pressure relief device, pressure-fired indicating mechanism wherein and utilize spacer ring to install all-in-one-piece expansion of metal box, wherein the upper cartridge body sidewall top of expansion of metal box and lower box body sidewall bottom are processed with through hole, utilize connecting leg that its each through hole is connected between each expansion of metal box respectively, the lower box body through hole of below expansion of metal box and joining communicating pipe of being packed on the housing base plate, the upper cartridge body through hole of the top expansion of metal box joins with the vent valve that is packed on the train wheel bridge.
Because the utility model is improved on the architecture basics of existing boxlike release of pressure metal expander, so except that keep its dependable performance, oil pressure indication sensitive, accurately the advantage, also the connection method between each expansion box is improved, not color traditional big connecting leg connects each little connecting leg the vacuum impregnating fuel tap is set again, has fundamentally cancelled the vacuum oil system of aforesaid operations complexity.Utilize connecting leg that its each through hole is connected between this expansion box respectively, the vacuum impregnating fuel tap that former and big connecting leg is joined changes into vent valve.Can make transformer oil ground from bottom to top in the instrument transformer successively in each expansion box of filling like this, oil injects with lower box body bottom through hole, and air is got rid of by upper cartridge body top through hole, is full of oil in each box, and air letter the top vent valve all drains and ends.This need not vacuumize can direct oiling method of operation, simplified the oiling operating procedure.The saving of labor, save time, air row is not to the utmost or make air reenter problem in the box, the reliability of exhaust when effectively having improved its oiling in the box when having solved the oiling that exists in the prior art.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a kind of concrete structure schematic diagram of the utility model.
Describe concrete structure of the present utility model in detail according to Fig. 1.This device be on the architecture basics of existing boxlike release of pressure metal expander, carry out improved.Its structure that has the housing 9 of observation window 10, the loam cake that is assembled in housing 9, base plate 12 and parts such as pressure-fired indicating mechanism 2, pressure relief device thereof keeps constant.The oiling mechanism of only will utilize spacer ring 5, going up the expansion of metal box 7 that lower plate installs puts into the melting pot.Cancel parts such as former vacuum oil system that communicates with the vacuum impregnating fuel tap and big connecting leg, little connecting leg.Upper cartridge body sidewall top at expansion of metal box 7 is processed with through hole, the bottom of lower box body sidewall is processed with through hole, utilize connecting leg 6 that its each through hole is connected between each expansion box respectively, promptly the upper cartridge body through hole of an expansion of metal box 7 is connected with the lower box body through hole of another adjacent metal expansion box 7.The lower box body through hole of below expansion of metal box and joining communicating pipe 4 of being packed on the housing base plate 12, the upper cartridge body through hole of the top expansion of metal box 7 joins with the vent valve 8 that is packed on the train wheel bridge.Pressure relief device can adopt firing pin type or not have the firing pin type structure, realizes discharging the purpose of the inner fault pressure that produces of instrument transformer by crushing releasing piece 3.The pointer 11 of pressure-fired indicating mechanism 2 can be indicated the variation of oil pressure on dial, can directly see from observation window 10.Fuel feeding valve 1 is set on housing base plate 12, can oiling in each expansion of metal box 7.
During work, the pressure-fired indicating mechanism of this device and the operating principle of pressure relief device are with existing boxlike release of pressure metal expander.During oiling, need not vacuumize and to inject by fuel feeding valve 1.Open vent valve 8 earlier, transformer oil is injected from fuel feeding valve 1, oil passes through communicating pipe 4 through the instrument transformer casing, enter in the box by the lower box body through hole of below expansion of metal box, when being full of box body gradually, with air in the box from the upper cartridge body through hole in connecting leg 6 enters the adjacent metal expansion box, by that analogy, after transformer oil is full of each expansion of metal box, close vent valve 8, promptly finish the work that does not vacuumize oiling.It is easy and simple to handle, exhaust is reliable.Therefore, the utility model is very easily applied.
Claims (3)
1, a kind of series connection exhaust boxlike release of pressure metal expander, comprise the housing and the assembling pressure relief device wherein that have observation window, pressure-fired indicating mechanism and utilize spacer ring to install all-in-one-piece expansion of metal box, the upper cartridge body sidewall top and the lower box body sidewall bottom that it is characterized in that the expansion of metal box are processed with through hole, utilize connecting leg that its each through hole is connected between each expansion of metal box respectively, the lower box body through hole of below expansion of metal box and joining communicating pipe of being packed on the housing base plate, the upper cartridge body through hole of the top expansion of metal box joins with the vent valve that is packed on the train wheel bridge.
2, expander according to claim 1 is characterized in that on the housing base plate fuel feeding valve being set.
3, expander according to claim 1 is characterized in that the upper cartridge body through hole of an expansion of metal box utilizes connecting leg to be connected with the lower box body through hole of another adjacent metal expansion box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95231959 CN2258651Y (en) | 1995-08-15 | 1995-08-15 | Series air exhaustible box type pressure-releasing metal expanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95231959 CN2258651Y (en) | 1995-08-15 | 1995-08-15 | Series air exhaustible box type pressure-releasing metal expanding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2258651Y true CN2258651Y (en) | 1997-07-30 |
Family
ID=33876442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95231959 Expired - Fee Related CN2258651Y (en) | 1995-08-15 | 1995-08-15 | Series air exhaustible box type pressure-releasing metal expanding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2258651Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763936A (en) * | 2010-02-10 | 2010-06-30 | 沈阳海为电力设备有限公司 | Metal bellow expansion oil storage tank |
-
1995
- 1995-08-15 CN CN 95231959 patent/CN2258651Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763936A (en) * | 2010-02-10 | 2010-06-30 | 沈阳海为电力设备有限公司 | Metal bellow expansion oil storage tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |