CN204650300U - A kind of automatic constant pressure device - Google Patents
A kind of automatic constant pressure device Download PDFInfo
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- CN204650300U CN204650300U CN201520379789.6U CN201520379789U CN204650300U CN 204650300 U CN204650300 U CN 204650300U CN 201520379789 U CN201520379789 U CN 201520379789U CN 204650300 U CN204650300 U CN 204650300U
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- valve
- pressure
- valve block
- housing
- automatic constant
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Abstract
Automatic constant pressure device of the present utility model, comprise housing, the first valve block and the second valve block is provided with in described housing, first valve block is fixed with air intake opening and pressure switch, described air intake opening is connected with source of the gas, and be disposed with one-level decompressor and second depressurized device along pipeline airintake direction in housing, the outlet side of second depressurized device is connected with the second valve block, described second valve block is fixed with gas outlet and pressure relief valve, and described gas outlet is connected with transformer; The blowout-back pressure gauge be connected with one-level decompressor and the low pressure gauge be connected with the second valve block is also provided with in housing.Automatic constant pressure device of the present utility model, by secondary pressure, automatically checks and charge operation oil tank of transformer, to keep slight positive pressure state stable in oil tank of transformer, alleviates the labour intensity of the personnel of escorting goods on a train, truck, etc.; There is over-voltage protecting function and warning function, to protect the safety of transformer and to remind related personnel's abnormal conditions.
Description
Technical field
The utility model relates to a kind of automatic constant pressure device, belongs to robotization Pneumatic Control Technology field.
Background technology
With high-tension development; large-scale power transformer or reactor are in long-distance transport or deposit in process; enter in body for preventing humid air; need in body, be filled with the blanket gas such as nitrogen or pure air; to form pressure-fired in apparatus body, thus humid air in environment is stoped to enter.Usually, for keeping blanket gas in the power equipment body such as transformer to be in pressure-fired, the pressure of personnel's continuous observation blanket gas that needs to arrange to escort goods on a train, truck, etc., manually adjusts inflation at any time.Especially exported product, in sea-freight process, can not arrange personnel to detect, can not the power equipment such as available protecting transformer.
Utility model content
The utility model, in order to overcome the deficiency of above technology, provides a kind of automatic constant pressure device, solves the problem that the power equipments such as high-power transformer need hand inspection and inflation in transportation.
the utility model overcomes the technical scheme that its technical matters adopts:
A kind of automatic constant pressure device, comprise housing, the first valve block and the second valve block is provided with in described housing, first valve block is fixed with air intake opening and pressure switch, described air intake opening is connected with source of the gas, and be disposed with one-level decompressor and second depressurized device along pipeline airintake direction in housing, the outlet side of second depressurized device is connected with the second valve block, described second valve block is fixed with gas outlet and pressure relief valve, and described gas outlet is connected with transformer; The blowout-back pressure gauge be connected with one-level decompressor and the low pressure gauge be connected with the second valve block is also provided with in housing.
Preferred according to the utility model, described pressure relief valve comprises valve seat and is threadedly connected to the valve body above valve seat, be provided with spring and film in the valve pocket of valve body, described film by valve body and spring compression on spool, mineralization pressure chamber between the lower surface of film and the sealing surface of valve seat; Body top is provided with the screw of regulating spring pressure, valve body is provided with the air hole being communicated with valve pocket and air, valve seat is provided with the air admission hole and relief hole that are connected with pressure chamber.
Preferred according to the utility model, described film is the rubber made membrane with ripple struction, has good elasticity.
Preferred according to the utility model, the range of described blowout-back pressure gauge is 0-25MPa, and the range of low pressure gauge is 0-0.1MPa.
Preferred according to the utility model, described housing is steel shell, and intensity is large, rotproofness is strong.
the beneficial effects of the utility model are:
1, automatic constant pressure device of the present utility model is by secondary pressure, automatically checks and charge operation oil tank of transformer, to keep slight positive pressure state stable in oil tank of transformer, alleviates the labour intensity of the personnel of escorting goods on a train, truck, etc.
2, be provided with pressure relief valve in automatic constant pressure device of the present utility model, there is over-voltage protecting function, when pressure exceedes safety value, carry out pressure release, to protect the safety of transformer.
3, automatic constant pressure device of the present utility model has warning function, when bleed pressure is not enough or when closing on approach exhaustion, can send sound and light alarm signal, reminds related personnel to check abnormal conditions.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model automatic constant pressure device.
Fig. 2 is the structural representation of the utility model pressure relief valve.
In figure, 1. air intake opening; 2. the first valve block; 3. pressure switch; 4. one-level decompressor; 5. second depressurized device; 6. low pressure gauge; 7. blowout-back pressure gauge; 8. the second valve block; 9. pressure relief valve; 10. gas outlet; 11. housings; 91. valve seats; 92. air admission holes; 93. relief holes; 94. films; 95. air holes; 96. springs; 97. screws; 98. valve bodies; 99. pressure chambers.
Embodiment
Better understand the utility model for the ease of those skilled in the art, be described in further details below in conjunction with the drawings and specific embodiments to the utility model, following is only exemplary do not limit protection domain of the present utility model.
As shown in Figure 1, automatic constant pressure device of the present utility model, comprise steel shell 11, the first valve block 2 and the second valve block 8 is provided with in described housing, first valve block 2 is fixed with air intake opening 1 and the pressure switch 3 for detecting bleed pressure size, described pressure switch is connected with battery-powered audible-visual annunciator, there is sound and light of alarm, when bleed pressure deficiency or when closing on approach exhaustion, sound and light alarm signal can be sent, related personnel is reminded to check abnormal conditions, described air intake opening is connected with source of the gas, one-level decompressor 4 and second depressurized device 5 is disposed with along pipeline airintake direction in housing, the outlet side of second depressurized device is connected with the second valve block 8, described second valve block 8 is fixed with gas outlet 10 and pressure relief valve 9, described gas outlet is connected with transformer, the blowout-back pressure gauge 7 be connected with one-level decompressor 4 and the low pressure gauge 6 be connected with the second valve block 8 is also provided with in housing, blowout-back pressure gauge 7 can show bleed pressure size in real time, low pressure gauge 6 can demonstrate pressure size in outlet pressure and transformer body in real time, the range of described blowout-back pressure gauge 7 is 0-25MPa, and the range of low pressure gauge 6 is 0-0.1MPa.
As shown in Figure 2, the valve body 98 that described pressure relief valve 9 comprises valve seat 91 and is threadedly connected to above valve seat, spring 96 and film 94 is provided with in the valve pocket of valve body 98, described film 94 is for having the rubber made membrane of ripple struction, there is good elasticity, described film 94 is pressed on spool by valve body 98 and spring 96, mineralization pressure chamber 99 between the lower surface of film 94 and the sealing surface of valve seat 91; Body top is provided with the screw 97 of regulating spring pressure, valve body is provided with the air hole 95 being communicated with valve pocket and air, valve seat is provided with the air admission hole 92 and relief hole 93 that are connected with pressure chamber 99.
The use procedure of the utility model automatic constant pressure device:
By high-pressure air source (15MPa, as nitrogen) blanket gas, receive on the air intake opening 1 of automatic constant pressure device through copper pipe, first by one-level decompressor 4, the gas of 15MPa is depressurized to 0.5MPa, then by second depressurized device 5, the gas of 0.5 MPa is depressurized to the steady pressure value 10KPa of requirement, at this moment automatic constant pressure device can be opened automatically, is inflated to 12KPa to transformer; When causing transformer pressure to exceed safety value (as 40KPa) because of reasons such as temperature Change; because air admission hole 92 is connected with pressure chamber 99; overpressure gases promotes the pressure that film 94 overcomes spring 96; film is pushed away from spool; overpressure gases is discharged to air from relief hole 93, to protect transformer safety.In addition, when bleed pressure is reduced to setting value (as 1MPa), pressure switch 3 closes, and its audible-visual annunciator connected can send continuous print sound and light alarm signal, reminds appliance crew to check exception.
Above numerical value only illustrates, all setting values all can adjust according to actual requirement.
Above only describes ultimate principle of the present utility model and preferred implementation, those skilled in the art can make many changes and improvements according to foregoing description, and these changes and improvements should belong to protection domain of the present utility model.
Claims (5)
1. an automatic constant pressure device, comprise housing (11), it is characterized in that: in described housing, be provided with the first valve block (2) and the second valve block (8), first valve block (2) is fixed with air intake opening (1) and pressure switch (3), described air intake opening is connected with source of the gas, one-level decompressor (4) and second depressurized device (5) is disposed with along pipeline airintake direction in housing, the outlet side of second depressurized device is connected with the second valve block (8), described second valve block (8) is fixed with gas outlet (10) and pressure relief valve (9), described gas outlet is connected with transformer, the blowout-back pressure gauge (7) be connected with one-level decompressor (4) and the low pressure gauge (6) be connected with the second valve block (8) is also provided with in housing.
2. automatic constant pressure device according to claim 1, it is characterized in that: described pressure relief valve (9) comprises valve seat (91) and is threadedly connected to the valve body (98) above valve seat, spring (96) and film (94) is provided with in the valve pocket of valve body (98), described film (94) is pressed on spool by valve body (98) and spring (96), mineralization pressure chamber (99) between the lower surface of film (94) and the sealing surface of valve seat (91); Body top is provided with the screw (97) of regulating spring pressure, valve body is provided with the air hole (95) being communicated with valve pocket and air, valve seat is provided with the air admission hole (92) and relief hole (93) that are connected with pressure chamber (99).
3. automatic constant pressure device according to claim 2, is characterized in that: described film (94) is for having the rubber made membrane of ripple struction.
4. automatic constant pressure device according to claim 1 and 2, is characterized in that: the range of described blowout-back pressure gauge (7) is 0-25MPa, and the range of low pressure gauge (6) is 0-0.1MPa.
5. automatic constant pressure device according to claim 1 and 2, is characterized in that: described housing (11) is steel shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520379789.6U CN204650300U (en) | 2015-06-04 | 2015-06-04 | A kind of automatic constant pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520379789.6U CN204650300U (en) | 2015-06-04 | 2015-06-04 | A kind of automatic constant pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204650300U true CN204650300U (en) | 2015-09-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520379789.6U Active CN204650300U (en) | 2015-06-04 | 2015-06-04 | A kind of automatic constant pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204650300U (en) |
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2015
- 2015-06-04 CN CN201520379789.6U patent/CN204650300U/en active Active
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |