CN2225090Y - Case pressure releasing metal expander - Google Patents
Case pressure releasing metal expander Download PDFInfo
- Publication number
- CN2225090Y CN2225090Y CN 94230210 CN94230210U CN2225090Y CN 2225090 Y CN2225090 Y CN 2225090Y CN 94230210 CN94230210 CN 94230210 CN 94230210 U CN94230210 U CN 94230210U CN 2225090 Y CN2225090 Y CN 2225090Y
- Authority
- CN
- China
- Prior art keywords
- firing pin
- indicating mechanism
- pin body
- oil temperature
- expansion
- 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 case type pressure releasing metal expander which comprises a casing with an observation window, a pressure releasing device arranged in the casing, an oil temperature change indicating mechanism and a metal expanding case, wherein, a screw groove is arranged on a needle striking body in the oil temperature change indicating mechanism; a drive shaft is fixedly arranged on a rotary sleeve with a pointer; the drive shaft is inserted in the screw groove of the needle striking body. The utility model further raises use reliability, effectively reduces the entire height, improves the working accuracy of the indicating mechanism and eliminates visual errors.
Description
The utility model relates to a kind of boxlike release of pressure metal expander that is used on the oil immersed type instrument transformer.
The kind that is used for the safety device on the oil immersed type instrument transformer at present is more.The boxlike release of pressure metal expander that wherein can adapt to various applying working conditions, for security reliability and the oil temperature that further improves its pressure relief device changes the sensitivity of indicating mechanism, according to integral installation, the requirements on transport of equipment, structure is in renewal, perfect constantly.Oil temperature changes indicating mechanism and drives pointer from drift and rotate, and changes rotor into and drives dial axis and drive pointer and rotate, and develops into driving lever and drives fork and drive pointer and rotate, and has made the indication of oil temperature sensitive gradually, reliable.Existing a kind of boxlike release of pressure metal expander is to adopt helicla flute to drive the structure that pointer rotates, the oil pressure variation that it can solve in the ripple box is linear with the pointer position variation that the oil temperature changes indicating mechanism, scale on the dial is equally spaced, shows accurately, it is convenient to observe.But because of it puts helicla flute processing at hand rest, power transmission shaft places on the firing pin body.So just strengthen the length of cover for seat, thereby made the firing pin body lengthening of whole indicating mechanism, increased the volume and the cost of entire equipment.
The purpose of this utility model provides a kind of improved boxlike release of pressure metal expander, and it has also reduced its whole height effectively and improved the work accuracy of indicating mechanism except that further raising dependability, has eliminated the collimation error.
The purpose of this utility model is achieved in that this device comprises that the housing and assembling pressure relief device, the oil temperature wherein that have observation window change indicating mechanism and expansion of metal box, wherein be processed with helicla flute on the firing pin body in the oil temperature variation indicating mechanism, have on the turning set of pointer and be fixed with power transmission shaft, power transmission shaft is inserted in the helicla flute of firing pin body.
Be processed with the turning set rotation that the driving of spiral fluted firing pin body is fixed with power transmission shaft because the utility model adopts, drive pointer and rotate, indicate oily temperature situation of change exactly, so the height of this turning set is obviously low than the height that has band spiral fluted turning set now.Therefore, this device reduces its overall height along with the oil temperature changes reducing of indicating mechanism's total length, help satisfying the integral installation and the requirements on transport of equipment more, further improving on the basis of its dependability, eliminated the collimation error, improved the accuracy that oily temperature changes indication.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a kind of concrete structure schematic diagram of the present utility model.
Fig. 2 is that Figure 1A is to view.
Describe concrete structure of the present utility model in detail according to Fig. 1-2.This device is on the architecture basics of existing boxlike release of pressure expansion of metal box, collects its chief, entangles its weak point, redesigns to form.It comprises the housing 2 that has observation window 11, base plate 1 and utilize support plate 19, go up lower plate 8, screw rod 9 assembling all-in-one-piece expansion of metal boxes 4, the oil temperature changes indicating mechanism and pressure relief device.Wherein each expansion of metal box 4 communicates with vacuum impregnating fuel tap 7 and communicating pipe 22 respectively by little connecting leg 6 and big connecting leg 3.For increasing the elasticity of stitching the expansion of metal box 4 that is welded into and strengthening respiratory capacity, be equipped with between its elasticity upper and lower box body and reinforce support ring 5, produce permanent deformation in the time of can preventing to vacuumize.Pressure relief device can adopt the firing pin type pressure relief device according to actual needs, and promptly the inner fault pressure that produces of instrument transformer by the effect of expansion of metal box, promotes firing pin and smashes releasing piece 17; Also can adopt no firing pin type pressure relief device, be about to releasing piece 17 and be encapsulated on the base plate 1, and contact with pasta in the instrument transformer oil conservator, directly utilize the inner fault pressure that produces of instrument transformer, crushing releasing piece 17 realizes that pressure is released to the fast reaction of millisecond.Firing pin body 16 upper ends that the oil temperature changes indicating mechanism utilize back-moving spring 13 to contact with expansion of metal box 4 lower surfaces, and its lower end is connected firing pin pad 18 (also firing pin can be installed).Be processed with the vertical chute with parallel axes on firing pin body 16 sidewalls, and circumferentially locate, make firing pin body 16 move and can not circumferentially rotate along axis direction by the limit shaft in the plug-in mounting chute 14.Be processed with helicla flute on firing pin body 16, this spiral fluted helical angle is determined according to actual needs.The turning set 15 that is sleeved on the firing pin body 16 has pointer 12.Be fixed with power transmission shaft 20 on the turning set 15, power transmission shaft 20 is inserted in the helicla flute of firing pin body 16, slides along the helicla flute direction.Turning set 15 is assembled in by interstage sleeve 21 and carries out axial location on the lower plate 8, and turning set 15 can only be rotated in interstage sleeve 21, and the pointer that drives on it rotates in the open slot of interstage sleeve 21, and indicating graduation changes on dial 10.
During work, the volume of instrument transformer internal transformer oil varies with temperature and increases and decreases, and expansion of metal box 4 plays the cubage compensation effect because of the changeability of its volume.When temperature rising oil pressure increases, oil in the instrument transformer enters expansion of metal box 4 by communicating pipe 22, big connecting leg 3, little connecting leg 6, under the oil pressure effect, expand, the firing pin body 16 that contacts with expansion of metal box 4 bottoms is moved vertically, power transmission shaft 20 on the turning set 15 is slided along the helicla flute direction, drive pointer 12 and in the open slot of interstage sleeve 21, rotate, point out that on dial 10 the oil temperature changes, and can directly see on observation window 11.When oil pressure was reduced to normal condition, back-moving spring 13 made firing pin body 16 return to initial position, and the pointer 12 that power transmission shaft 20 drives on the turning set 15 points to the normal position.When the inner generation of instrument transformer fault pressure, releasing piece 17 is broken rapidly under the effect of superpressure oil (or firing pin), realizes the fast reaction that pressure discharges.
Claims (3)
1, a kind of boxlike release of pressure metal expander, comprise that the housing and assembling pressure relief device, the oil temperature wherein that have observation window change indicating mechanism and expansion of metal box, it is characterized in that being processed with helicla flute on the firing pin body in the oil temperature variation indicating mechanism, have on the turning set of pointer and be fixed with power transmission shaft, power transmission shaft is inserted in the helicla flute of firing pin body.
2, expander according to claim 1 is characterized in that stitching between the elasticity upper and lower box body of the expansion of metal box that is welded into the reinforcing support ring is housed.
3, expander according to claim 1, it is characterized in that firing pin body upper end utilizes back-moving spring to contact with expansion of metal box lower surface, be processed with the vertical chute with parallel axes on the firing pin body sidewall, and circumferentially locate by the limit shaft in the plug-in mounting chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94230210 CN2225090Y (en) | 1994-09-13 | 1994-09-13 | Case pressure releasing metal expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94230210 CN2225090Y (en) | 1994-09-13 | 1994-09-13 | Case pressure releasing metal expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2225090Y true CN2225090Y (en) | 1996-04-17 |
Family
ID=33842369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94230210 Expired - Fee Related CN2225090Y (en) | 1994-09-13 | 1994-09-13 | Case pressure releasing metal expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2225090Y (en) |
-
1994
- 1994-09-13 CN CN 94230210 patent/CN2225090Y/en not_active Expired - Fee Related
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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 |