CN203239659U - Novel pneumatic control loop of thermal power plant high-temperature area pneumatic actuating mechanism - Google Patents
Novel pneumatic control loop of thermal power plant high-temperature area pneumatic actuating mechanism Download PDFInfo
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- CN203239659U CN203239659U CN 201320302188 CN201320302188U CN203239659U CN 203239659 U CN203239659 U CN 203239659U CN 201320302188 CN201320302188 CN 201320302188 CN 201320302188 U CN201320302188 U CN 201320302188U CN 203239659 U CN203239659 U CN 203239659U
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- power plant
- thermal power
- temperature area
- control loop
- actuating mechanism
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Abstract
The utility model discloses a novel pneumatic control loop of a thermal power plant high-temperature area pneumatic actuating mechanism. The novel pneumatic control loop of the thermal power plant high-temperature area pneumatic actuating mechanism comprises an air cylinder, a filtering pressure-reducing valve, a two-position five-way electromagnetic valve and a clamping sleeve three-way connector, wherein an outlet of the filtering pressure-reducing valve is connected with an inlet of the clamping sleeve three-way connector, two outlets of the clamping sleeve three-way connector are connected with two inlets of the two-position five-way electromagnetic valve respectively, and two outlets of the two-position five-way electromagnetic valve are connected with an upper cylinder inlet and a lower cylinder inlet of an air cylinder respectively. The novel pneumatic control loop of the thermal power plant high-temperature area pneumatic actuating mechanism has the advantages that due to the fact that the electromagnetic valve and a travel switch adopt high temperature resistance equipment, maloperation or miss operation of equipment caused by high temperature is avoided, the reliability of the equipment is largely improved, and safe and stable operation of a machine unit is guaranteed. The novel pneumatic control loop of the thermal power plant high-temperature area pneumatic actuating mechanism largely improves the response speed of the valves, and lowers the failure rate of the electromagnetic valve by adopting the high temperature resistance electromagnetic valve, and improves the reliability.
Description
Technical field
The utility model relates to a kind of pneumatic control circuit design, particularly relates to the novel pneumatic control circuit of a kind of thermal power plant high-temperature area pneumatic actuator.
Background technique
Most power plant are in order to reduce the capital construction cost, thermal power plant high-temperature area pneumatic actuator gas control element such as solenoid valve 6, position limit switch 7 etc. still use conventional equipment, the resistance to high temperature of conventional equipment is poor, causes equipment malfunction or tripping, has brought certain risk to stable operation of unit.
Solenoid valve 6 in the pneumatic control circuit and position limit switch 7 faults can cause drawing gas, and non-return flap is closed or valve feeds back the situations such as disappearance.Valve closing causes the high and low pressure heater to cut steam, and will affect feed temperature, reduces unit economy.
Common position limit switch is because ambient temperature is too high, and is aging easily, will cause the equipment tripping after wearing out.If the equipment tripping will cause the interlock device can't regular event.During the unit failure operating mode, the equipment of the action of should interlocking does not move and may cause unit load down or the unplanned stoppage in transit of unit, then causes serious economic loss.
The model utility content
The purpose of this utility model is to provide a kind of thermal power plant high-temperature area pneumatic actuator novel pneumatic control circuit.
The purpose of this utility model is implemented by following technological scheme, the novel pneumatic control circuit of a kind of thermal power plant high-temperature area pneumatic actuator, it comprises cylinder and filtering pressure reducing valve, it also comprises two five-way electromagnetic valves and sleeve three-way connector, the outlet of described filtering pressure reducing valve is connected with the import of described sleeve three-way connector, two outlets of described sleeve three-way connector are connected with two imports of described two five-way electromagnetic valves respectively, and two outlets of described two five-way electromagnetic valves are connected with lower cylinder import with the upper cylinder half import of described cylinder respectively.The specifications and models of two five-way electromagnetic valves are: VSG-4602-316-155-HT-A240, U.S. VERSA has good resistance to high temperature.
On the piston rod of described cylinder high-temperature-resistant stroke switch is installed.The specifications and models of high-temperature-resistant stroke switch are micro switch LSA4L-2A.
The utility model has the advantage of, because solenoid valve and position limit switch are selected high temperature resistant type equipment, avoided high temperature to cause equipment malfunction or tripping, greatly improved the reliability of equipment, guarantee unit safety stable operation.The utility model has improved valve response speed greatly, moreover adopts high temperature resistant solenoid valve, has reduced the solenoid valve failure rate, has improved the reliability of pneumatic control circuit.
Description of drawings
Fig. 1 is high-temperature area pneumatic actuator novel gas control circuit diagram in a kind of thermal power plant before transforming.
Fig. 2 is high-temperature area pneumatic actuator novel gas control circuit diagram in a kind of thermal power plant after transforming.
Embodiment: the novel pneumatic control circuit of a kind of thermal power plant high-temperature area pneumatic actuator, it comprises cylinder 1, filtering pressure reducing valve 2, two five-way electromagnetic valves 3 and sleeve three-way connector 4, the outlet of filtering pressure reducing valve 2 is connected with the import of sleeve three-way connector 4, two outlets of sleeve three-way connector 4 are connected with two imports of two five-way electromagnetic valves 3 respectively, and two outlets of two five-way electromagnetic valves 3 are connected with lower cylinder import with the upper cylinder half import of cylinder 1 respectively.The specifications and models of two five-way electromagnetic valves 3 are: VSG-4602-316-155-HT-A240, U.S. VERSA has good resistance to high temperature.High-temperature-resistant stroke switch 5 is installed on the piston rod of cylinder 1.The specifications and models of high-temperature-resistant stroke switch 5 are micro switch LSA4L-2A.
Claims (2)
1. novel pneumatic control circuit of thermal power plant high-temperature area pneumatic actuator, it comprises cylinder and filtering pressure reducing valve, it is characterized in that, it also comprises two five-way electromagnetic valves and sleeve three-way connector, the outlet of described filtering pressure reducing valve is connected with the import of described sleeve three-way connector, two outlets of described sleeve three-way connector are connected with two imports of described two five-way electromagnetic valves respectively, and two outlets of described two five-way electromagnetic valves are connected with lower cylinder import with the upper cylinder half import of described cylinder respectively.
2. the novel pneumatic control circuit of a kind of thermal power plant high-temperature area pneumatic actuator according to claim 1 is characterized in that, on the piston rod of described cylinder high-temperature-resistant stroke switch is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302188 CN203239659U (en) | 2013-05-20 | 2013-05-20 | Novel pneumatic control loop of thermal power plant high-temperature area pneumatic actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302188 CN203239659U (en) | 2013-05-20 | 2013-05-20 | Novel pneumatic control loop of thermal power plant high-temperature area pneumatic actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203239659U true CN203239659U (en) | 2013-10-16 |
Family
ID=49316965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320302188 Expired - Lifetime CN203239659U (en) | 2013-05-20 | 2013-05-20 | Novel pneumatic control loop of thermal power plant high-temperature area pneumatic actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203239659U (en) |
-
2013
- 2013-05-20 CN CN 201320302188 patent/CN203239659U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131016 |