CN201322880Y - Automatic pressure adjustment device - Google Patents
Automatic pressure adjustment device Download PDFInfo
- Publication number
- CN201322880Y CN201322880Y CNU2008201445892U CN200820144589U CN201322880Y CN 201322880 Y CN201322880 Y CN 201322880Y CN U2008201445892 U CNU2008201445892 U CN U2008201445892U CN 200820144589 U CN200820144589 U CN 200820144589U CN 201322880 Y CN201322880 Y CN 201322880Y
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- Prior art keywords
- relay
- pressure
- series
- loop
- relay normally
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Abstract
The utility model discloses an automatic pressure adjustment device capable of conducting automatic pressure adjustment with high reliability. A series circuit between a first relay normally opened contact ZJ1-2 and a second relay normally closed contact ZJ2-3 is connected with a lower stop switch K2 of an electro connecting pressure gauge in parallel to form a parallel circuit, the parallel circuit is then connected with a first relay coil ZJ1-1 in series to form a branch circuit, and the branch circuit is connected with the two ends of a power supply switch respectively to form a loop; a series circuit between a second relay normally opened contact ZJ2-2 and a first relay normally closed contact ZJ1-3 is connected with an upper stop switch K3 of the electro connecting pressure gauge in parallel to form a parallel circuit, the parallel circuit is then connected with a second relay coil ZJ2-1 in series to form a branch circuit, and the branch circuit is connected with the two ends of the power supply switch respectively to form a loop; and a branch circuit formed by the series connection between a solenoid valve and a second relay normally opened contact ZJ2-5 is connected with both ends of the power supply switch to form a loop. The device can avoid potential safety hazards caused by overvoltage running, and has the advantages of simple structure, low cost and high reliability.
Description
Technical field
The utility model relates to a kind of pressure automatic adjusting device.
Background technology
Along with the progress of society, safety in production more and more comes into one's own.For the equipment of some band pressure work, the potential safety hazard of avoiding the work of equipment superpressure to bring, guaranteeing safe production is the focus of each unit.With the boiler is example, in order to prevent that boiler from running leakage owing to boiler hot-water appears in the superpressure operation, even blast, various tensimeters and pressure relief pipe are installed on boiler, when the force value of tensimeter demonstration surpasses safe pressure, the kettleman opens the blowoff valve on the pressure relief pipe, and a large amount of hot water is discharged to sewer, realizes decompression.Above-mentioned pressure release mode causes the waste of a large amount of hot water, and artificial the realization reduced pressure, and be very inconvenient, when the kettleman does not have timely pressure release, is prone to accidents.Also there is above-mentioned problem in other equipment.
The utility model content
The utility model is in order to overcome weak point of the prior art, and providing a kind of can carry out the pressure adjustment automatically, and the reliability height is simple in structure, the pressure automatic adjusting device that cost is low.
The utility model is achieved through the following technical solutions:
A kind of pressure automatic adjusting device, it is characterized in that, comprise the electro connecting pressure gauge and solenoid valve and the control circuit that are connected on the equipment pressure pipeline, described control circuit comprises first relay and second relay, power supply is connected with power switch K1, connect with the second relay normally closed contact ZJ2-3 branch road that parallel circuit that back and the lower dead center K switch 2 of electro connecting pressure gauge compose in parallel and the first relay coil ZJ1-1 be composed in series of the first relay normally open contact ZJ1-2 connects to form the loop with the two ends of power switch K1 respectively, connect with the first relay normally closed contact ZJ1-3 branch road that parallel circuit that back and the top dead centre K switch 3 of electro connecting pressure gauge compose in parallel and the second relay coil ZJ2-1 be composed in series of the second relay normally open contact ZJ2-2 connects to form the loop with the two ends of power switch K1 respectively, and the branch road that the solenoid valve K and the second relay normally open contact ZJ2-5 are composed in series connects to form the loop with the two ends of power switch K1 respectively.
The branch road that the normal pilot lamp XD1 of pressure and the first relay normally open contact ZJ1-4 are composed in series two ends other and power switch K1 connect to form the loop, and the branch road that the pressure release pilot lamp XD2 and the second relay normally open contact ZJ2-4 are composed in series two ends other and power switch K1 connect to form the loop.
Described solenoid valve is connected with return pipe, and described return pipe is connected with cistern.
The utlity model has following technique effect:
1. pressure automatic adjusting device of the present utility model can carry out pressure automatically according to the force value that manometric pointer is represented to be regulated, and avoids because the potential safety hazard that the superpressure operation brings is saved the manpower financial capacity.And simple in structure, in light weight, cost is low, and is easy for installation.
2. pressure automatic adjusting device of the present utility model is assembled by electric elements, and in circuit design, adopt the two-circuit design, when break down in a loop, another loop can ensure operate as normal, the phenomenon of not working or delay work can not appear, the reliability height.
3. a small amount of gas of solenoid valve discharge is connected with cistern by return pipe, has reduced the waste of a large amount of hot water.And, reduced the unlatching number of times of blowoff valve, prolonged the serviceable life of blowoff valve.Reduced operating cost.
4. when needs changed pressure index, the knob that only needs to adjust on the electro connecting pressure gauge just can carry out the adjusting of safe pressure value, and was easy to use.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model pressure automatic adjusting device.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail.
Pressure automatic adjusting device of the present utility model comprises electro connecting pressure gauge and solenoid valve and the control circuit that is connected on the equipment pressure pipeline.The schematic diagram of described control circuit as shown in Figure 1, comprise first relay and second relay, power supply is connected with power switch K1, connect with the second relay normally closed contact ZJ2-3 branch road that parallel circuit that back and the lower dead center K switch 2 of electro connecting pressure gauge compose in parallel and the first relay coil ZJ1-1 be composed in series of the first relay normally open contact ZJ1-2 connects to form the loop with the two ends of power switch K1 respectively, connect with the first relay normally closed contact ZJ1-3 branch road that parallel circuit that back and the top dead centre K switch 3 of electro connecting pressure gauge compose in parallel and the second relay coil ZJ2-1 be composed in series of the second relay normally open contact ZJ2-2 connects to form the loop with the two ends of power switch K1 respectively, and the branch road that the solenoid valve K and the second relay normally open contact ZJ2-5 are composed in series connects to form the loop with the two ends of power switch K1 respectively.
For the ease of checking the equipment pressure condition, the branch road that the normal pilot lamp XD1 of pressure and the first relay normally open contact ZJ1-4 are composed in series two ends other and power switch K1 connect to form the loop, and the branch road that the pressure release pilot lamp XD2 and the second relay normally open contact ZJ2-4 are composed in series two ends other and power switch K1 connect to form the loop.
In order to prevent that hot gas that solenoid valve is discharged from hurting sb.'s feelings or produce thermal loss, described solenoid valve is connected with return pipe, and described return pipe is connected with cistern.
Initial during use, the pressure in the equipment is low, and the pointer of electro connecting pressure gauge is in lower dead center, lower dead center K switch 2 closures.Closed power switch K1, the first relay coil ZJ1-1 gets electric, the normally opened contact ZJ1-2 of first relay, ZJ1-4 closure, normally closed contact ZJ1-3 opens.The normally opened contact ZJ1-4 closure of first relay, the normal pilot lamp XD1 of pressure branch road is connected, and the normal pilot lamp XD1 of pressure lights.Normally closed contact ZJ1-3 opens and prevents that second relay from delaying work.Along with the operation of equipment, pressure increases, and lower dead center K switch 2 is opened, and realizes the first relay self-locking by the normally opened contact ZJ1-2 of first relay of closure with connecting of the second relay normally closed contact ZJ2-3.When equipment pressure increases to the pointer arrival top dead centre of electro connecting pressure gauge, top dead centre K switch 3 closures, the second relay coil ZJ2-1 gets electric, normally opened contact ZJ2-2, the ZJ2-4 of second relay, ZJ2-5 closure, normally closed contact ZJ2-3 opens.The normally opened contact ZJ2-4 closure of second relay, pressure release pilot lamp XD2 branch road is connected, and pressure release pilot lamp XD2 lights.The normally opened contact ZJ2-5 closure of second relay, the solenoid valve branch road is connected, and solenoid valve is opened, and discharges unnecessary pressure.Normally closed contact ZJ2-3 opens, the first relay coil ZJ1-1 dead electricity, and normally opened contact ZJ1-2, the ZJ1-4 of first relay open, normally closed contact ZJ1-3 closure.The normally opened contact ZJ1-4 of first relay opens, and the normal pilot lamp XD1 of pressure branch road disconnects, and the normal pilot lamp XD1 of pressure extinguishes.Along with the release of pressure, the pointer of electro connecting pressure gauge descends, and top dead centre K switch 3 is opened, by the normally opened contact ZJ2-2 of second relay of the closure realization second relay self-locking of connecting with the first relay normally closed contact ZJ1-3.
When pressure is discharged into normal range, along with the release of pressure, when the pointer of electro connecting pressure gauge drops to lower dead center, lower dead center K switch 2 closures, the first relay coil ZJ1-1 again electric work, the normally opened contact ZJ1-2 of first relay, ZJ1-4 closure, normally closed contact ZJ1-3 opens.Make the normal pilot lamp XD1 of pressure light, the latching circuit of second relay disconnects, the second relay coil ZJ2-1 dead electricity, normally opened contact ZJ2-2, the ZJ2-4 of second relay, ZJ2-5 closure, normally closed contact ZJ2-3 opens, thus control electromagnetic valve close, pressure release pilot lamp XD2 extinguishes.
Go round and begin again, just formed the self-regulating process of pressure, make equipment maintain the state operation down of a safety.
Although relate to a kind of pressure automatic adjusting device and carried out special description disclosed with reference to embodiment, embodiment described above is illustrative and not restrictive, under the situation that does not break away from spirit and scope of the present utility model, all variations and modification are all within scope of the present utility model.
Claims (3)
1, a kind of pressure automatic adjusting device, it is characterized in that, comprise the electro connecting pressure gauge and solenoid valve and the control circuit that are connected on the equipment pressure pipeline, described control circuit comprises first relay and second relay, power supply is connected with power switch K1, connect with the second relay normally closed contact ZJ2-3 branch road that parallel circuit that back and the lower dead center K switch 2 of electro connecting pressure gauge compose in parallel and the first relay coil ZJ1-1 be composed in series of the first relay normally open contact ZJ1-2 connects to form the loop with the two ends of power switch K1 respectively, connect with the first relay normally closed contact ZJ1-3 branch road that parallel circuit that back and the top dead centre K switch 3 of electro connecting pressure gauge compose in parallel and the second relay coil ZJ2-1 be composed in series of the second relay normally open contact ZJ2-2 connects to form the loop with the two ends of power switch K1 respectively, and the branch road that the solenoid valve K and the second relay normally open contact ZJ2-5 are composed in series connects to form the loop with the two ends of power switch K1 respectively.
2, pressure automatic adjusting device according to claim 1, it is characterized in that, the branch road that the normal pilot lamp XD1 of pressure and the first relay normally open contact ZJ1-4 are composed in series two ends other and power switch K1 connect to form the loop, and the branch road that the pressure release pilot lamp XD2 and the second relay normally open contact ZJ2-4 are composed in series two ends other and power switch K1 connect to form the loop.
3, pressure automatic adjusting device according to claim 1 and 2 is characterized in that, described solenoid valve is connected with return pipe, and described return pipe is connected with cistern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201445892U CN201322880Y (en) | 2008-12-18 | 2008-12-18 | Automatic pressure adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201445892U CN201322880Y (en) | 2008-12-18 | 2008-12-18 | Automatic pressure adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201322880Y true CN201322880Y (en) | 2009-10-07 |
Family
ID=41160257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201445892U Expired - Fee Related CN201322880Y (en) | 2008-12-18 | 2008-12-18 | Automatic pressure adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201322880Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954043A (en) * | 2014-05-22 | 2014-07-30 | 山东华联矿业股份有限公司 | Automatic water supplementing device |
-
2008
- 2008-12-18 CN CNU2008201445892U patent/CN201322880Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954043A (en) * | 2014-05-22 | 2014-07-30 | 山东华联矿业股份有限公司 | Automatic water supplementing device |
| CN103954043B (en) * | 2014-05-22 | 2016-08-24 | 山东华联矿业股份有限公司 | Automatic water-replenishing device |
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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: 20091007 Termination date: 20111218 |