CN103899829B - A kind of double-action Pneumatic actuator with adjustment and failure safe function - Google Patents
A kind of double-action Pneumatic actuator with adjustment and failure safe function Download PDFInfo
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- CN103899829B CN103899829B CN201410119414.6A CN201410119414A CN103899829B CN 103899829 B CN103899829 B CN 103899829B CN 201410119414 A CN201410119414 A CN 201410119414A CN 103899829 B CN103899829 B CN 103899829B
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- valve
- pneumatic
- gas
- pneumatic valve
- air inflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
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- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Mechanical Engineering (AREA)
Abstract
The present invention relates to a kind of double-action Pneumatic actuator with adjustment and failure safe function, comprise valve, piston cavity and airflow control mechanism, the piston rod linked with valve rod is provided with in piston cavity, forward chamber and reverse chamber is comprised in piston cavity, airflow control mechanism comprises gas source, solenoid valve, first Pneumatic valve, second Pneumatic valve and air inflow adjusting part, first Pneumatic valve one end is connected with forward chamber, switch between the other end and air inflow adjusting part and the external world, second Pneumatic valve one end is connected with reverse chamber, switch between the other end and air inflow adjusting part and gas source, solenoid valve provides gas signal for the first Pneumatic valve and the second Pneumatic valve, air inflow adjusting part is that the first Pneumatic valve and the second Pneumatic valve control gas flow.Adopt such scheme, the invention provides that a kind of valve is automatically back to initial bit and can the double-action Pneumatic actuator with adjustment and failure safe function of feedback regulating valve enable possition having a power failure suddenly, when stopping the supple of gas or steam.
Description
Technical field
The present invention relates to a kind of valve control system field, be specifically related to a kind of double-action Pneumatic actuator with adjustment and failure safe function.
Background technique
At present, along with the fast development of industry, also more and more higher to the requirement of valve, particularly require also more and more higher for valve Automated condtrol, not only require that valve has emergency cut-off function, or emergency closing function, or valve position regulatory function, but require that a certain deck valve door must possess the several functions of emergency opening, emergency cut-off, automatically adjustment and failure safe return.
Double-action Pneumatic actuator comprises the double-acting actuating mechanism of valve and control valve body opening and closing, double-acting actuating mechanism comprises the piston cavity be installed on valve and the airflow control mechanism controlling air-flow turnover piston cavity, the valve rod of control valve opening and closing is provided with in valve, be provided with in piston cavity by air propels and link the piston rod of opening and closing valve with valve rod, conventional airflow control mechanism realizes valve by electrically-controlled valve control gas turnover piston cavity and opens fast, close, but can not realize having a power failure suddenly, to stop the supple of gas or steam etc. failure condition time, valve can not automatically return to the home of system requirements, and do not possess regulatory function, thus, often insufficiency of function is caused at crucial moment, thus great accident and disaster may be caused.
Summary of the invention
For the deficiency that prior art exists, the object of the present invention is to provide that a kind of valve is automatically back to initial bit and can the double-action Pneumatic actuator with adjustment and failure safe function of regulating valve enable possition having a power failure suddenly, when stopping the supple of gas or steam.
For achieving the above object, the invention provides following technological scheme: the double-acting actuating mechanism comprising valve and control valve opening and closing, described double-acting actuating mechanism comprises the piston cavity be installed on valve and the airflow control mechanism controlling air-flow turnover piston cavity, the valve rod of control valve opening and closing is provided with in described valve, be provided with in described piston cavity by air propels and the piston rod linked with valve rod, comprise postive direction in described piston cavity promote the forward chamber of piston rod and promote the reverse chamber of piston rod in the other direction, described airflow control mechanism comprises gas source, it is characterized in that: described airflow control mechanism also comprises solenoid valve, first Pneumatic valve, second Pneumatic valve and air inflow adjusting part, first described Pneumatic valve one end is connected with forward chamber, switch between the other end and air inflow adjusting part and the external world, second described Pneumatic valve one end is connected with reverse chamber, switch between the other end and air inflow adjusting part and gas source, described solenoid valve is series at gas source and provides gas signal for the first Pneumatic valve and the second Pneumatic valve, described air inflow adjusting part is arranged at the first Pneumatic valve and controls gas flow between the second Pneumatic valve and gas source, the first Pneumatic valve and the second Pneumatic valve gas signal is given during described solenoid valves, air inflow adjusting part and forward chamber are carried out UNICOM by the first Pneumatic valve, air inflow adjusting part and reverse chamber are carried out UNICOM by the second Pneumatic valve, gas blackout when described solenoid valve dead electricity or arrow gas, the external world and forward chamber are carried out UNICOM by the first Pneumatic valve, gas source and reverse chamber are carried out UNICOM by the second Pneumatic valve.
By adopting technique scheme, solenoid valve coordinates the setting of two Pneumatic valves, no matter be run into the urgency had a power failure with stopping the supple of gas or steam, the solenoid valve being series at gas source all cannot continue to export gas signal to Pneumatic valve, cause Pneumatic valve when not being controlled the gas signal of its state self-return to initial position, in the specific embodiment of the invention, first Pneumatic valve controls the air inflow in forward chamber, second Pneumatic valve controls the air inflow in reverse chamber, during normal work, the first Pneumatic valve and the second Pneumatic valve gas signal is given during solenoid valves, air inflow adjusting part and forward chamber are carried out UNICOM by the first Pneumatic valve, air inflow adjusting part and reverse chamber are carried out UNICOM by the second Pneumatic valve, forward chamber and reverse chamber is entered respectively by the first Pneumatic valve and the second Pneumatic valve again after being subject to the adjustment of air inflow adjusting part from the gas of gas source, promote the piston rod linked with valve rod, by the air inflow that both sides are different, rotate different angles with ovable valve stem and valve is adjusted to required aperture, and prominent Loss of power failure and gas blackout during arrow gas fault of meeting of solenoid valve, the external world and forward chamber are carried out UNICOM by the first Pneumatic valve, gas source and reverse chamber are carried out UNICOM by the second Pneumatic valve, air in forward chamber is rapidly to extraneous discharge, and reverse chamber is direct and the maximum rate air inlet of gas source UNICOM, both coordinate promotion piston rod to be repositioned to initial bit rapidly, namely valve is classified as to initial bit, the forward slippage of piston rod can be linked and open valve, namely initial bit is the complete closed state of valve, also can be linked the forward slippage of piston rod closure valve, namely initial bit is the complete opening state of valve, different linked manner can adjust as required.
The present invention is set to further: described air inflow adjusting part comprises valve positioner, the first pneumatic relay and the second pneumatic relay, the first described pneumatic relay is corresponding with the first Pneumatic valve to be arranged and is arranged between the first Pneumatic valve and gas source, the second described pneumatic relay is corresponding with the second Pneumatic valve to be arranged and is arranged between the second Pneumatic valve and gas source, and described valve positioner is series at gas source for the first pneumatic relay and the second pneumatic relay provides gas signal.
By adopting technique scheme, when valve is opened in piston rod postive direction slippage interlock, valve positioner obtain electric while, gas signal is exported to the first pneumatic relay by starting according to the instruction of system, when system inputs the valve opening electrical signal of certain milliampere electric current, electrical signal is converted to gas signal and exports to the first pneumatic relay, first pneumatic relay has the function controlling gas source air inflow after gas signal amplifies, and the air inflow after amplifying is passed to forward chamber by the first Pneumatic valve, valve is opened gradually, along with the valve opening quiescent current size of system input increases gradually, the air inflow of the first pneumatic relay conversion increases gradually, valve is opened into gradually and opens completely, carry out controlling opening of valve thus, oppositely the gas in chamber then outputs to the second pneumatic relay by the second Pneumatic valve, the reverse air pressure that second pneumatic relay obtains feeds back on valve positioner, and by valve positioner to comparison valve opening, Correctly adjust is carried out to give vent to anger signal and air inlet signal, part gas can be discharged from the second pneumatic relay, realize the fine adjustment of valve opening position, and during piston rod postive direction slippage interlock closure valve, then can realize the fine adjustment of valve degree of closing position.
The present invention is set to further: the first described pneumatic relay and be provided with gas holder between the second pneumatic relay and gas source.
By adopting technique scheme, the gas being arranged on gas source when Pneumatic actuator is not also started working of gas holder can pre-position in gas holder, once work, just lay in enough tolerance, enter rapidly forward chamber, strengthen overall reaction velocity, reach required open position fast, and can be used for collecting the gas of discharging from the second pneumatic relay.
The present invention is set to further: the first described pneumatic relay and be provided with the first filtering pressure reducing valve between the second pneumatic relay and gas holder.
By adopting technique scheme, while first filtering pressure reducing valve removes the impurity such as oil, water, dirt in pressurized air, the diaphragm of filtering pressure reducing valve is made adjustment automatically, pressure is exported stably, ensure pressure stability, avoid pneumatic relay by gas shock, considerably increase the working life of Pneumatic actuator.
The present invention is set to further: described valve positioner and be provided with the second filtering pressure reducing valve between solenoid valve and gas source.
By adopting technique scheme, while second filtering pressure reducing valve removes the impurity such as oil, water, dirt in pressurized air, the diaphragm of filtering pressure reducing valve is made adjustment automatically, pressure is exported stably, ensure pressure stability, avoid valve positioner and solenoid valve by gas shock, considerably increase the working life of Pneumatic actuator.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention.
Embodiment
As shown in Figure 1, the invention discloses a kind of double-action Pneumatic actuator with adjustment and failure safe function, comprise the double-acting actuating mechanism of valve 1 and control valve 1 opening and closing, double-acting actuating mechanism comprises the piston cavity 2 be installed on valve 1 and the airflow control mechanism controlling air-flow turnover piston cavity 2, the valve rod 11 of control valve 1 opening and closing is provided with in valve 1, be provided with in piston cavity 2 by air propels and the piston rod 21 linked with valve rod 11, comprise postive direction in piston cavity 2 promote the forward chamber 22 of piston rod and promote the reverse chamber 23 of piston rod in the other direction, and in embodiment, piston cavity 2 is two and is arranged at the two ends of piston rod 21 respectively, piston rod 21 is provided with the piston plate 211 that slippage coordinates, two piston cavity 2 sync plus white promote piston rod 21 slippage, therefore forward chamber 22 and opposing pistons plate 211 both sides, reverse chamber 23 are arranged respectively, and quantity is two, airflow control mechanism comprises gas source 3, gas source 3 air outlet is provided with the first safety check 35 preventing from flowing backwards, airflow control mechanism also comprises solenoid valve 31, first Pneumatic valve 32, second Pneumatic valve 33 and air inflow adjusting part, first Pneumatic valve 32 one end is connected with forward chamber 22, switch between the other end and air inflow adjusting part and the external world, first Pneumatic valve 32 is provided with air outlet 321 for being connected with the external world, second Pneumatic valve 33 one end is connected with reverse chamber 23, switch between the other end and air inflow adjusting part and gas source 3, solenoid valve 31 is series at gas source 3 and provides gas signal for the first Pneumatic valve 32 and the second Pneumatic valve 33, air inflow adjusting part is arranged at the first Pneumatic valve 32 and controls gas flow between the second Pneumatic valve 33 and gas source 3, solenoid valve 31 gives the first Pneumatic valve 32 and the second Pneumatic valve 33 gas signal when being energized, air inflow adjusting part and forward chamber 22 are carried out UNICOM by the first Pneumatic valve 32, air inflow adjusting part and reverse chamber 23 are carried out UNICOM by the second Pneumatic valve 33, gas blackout when solenoid valve 31 dead electricity or arrow gas, the external world and forward chamber 32 are carried out UNICOM by the first Pneumatic valve 32, gas source 3 and reverse chamber 33 are carried out UNICOM by the second Pneumatic valve 33, solenoid valve 31 coordinates the setting of two Pneumatic valves, no matter be run into the urgency had a power failure with stopping the supple of gas or steam, the solenoid valve 31 being series at gas source 3 all cannot continue to export gas signal to Pneumatic valve, cause Pneumatic valve when not being controlled the gas signal of its state self-return to initial position, in the specific embodiment of the invention, first Pneumatic valve 32 controls the air inflow in forward chamber 22, second Pneumatic valve 33 controls the air inflow in reverse chamber 23, during normal work, solenoid valve 31 gives the first Pneumatic valve 32 and the second Pneumatic valve 33 gas signal when being energized, air inflow adjusting part and forward chamber 22 are carried out UNICOM by the first Pneumatic valve 32, air inflow adjusting part and reverse chamber 23 are carried out UNICOM by the second Pneumatic valve 33, forward chamber 22 and reverse chamber 23 is entered respectively by the first Pneumatic valve 32 and the second Pneumatic valve 33 again after being subject to the adjustment of air inflow adjusting part from the gas of gas source 3, promote the piston rod 21 linked with valve rod 11, by the air inflow that both sides are different, rotate different angles with ovable valve stem 11 and valve 1 is adjusted to required aperture, and prominent Loss of power failure and gas blackout during arrow gas fault of meeting of solenoid valve 31, the external world and forward chamber 22 are carried out UNICOM by the first Pneumatic valve 32, gas source and reverse chamber 23 are carried out UNICOM by the second Pneumatic valve 33, air in forward chamber 22 is rapidly to extraneous discharge, and reverse chamber 23 is direct and the maximum rate air inlet of gas source 3 UNICOM, both coordinate promotion piston rod 21 to be repositioned to initial bit rapidly, namely valve is classified as to initial bit, the forward slippage of piston rod 21 can be linked and open valve 1, namely initial bit is valve 1 closed state completely, also can be linked the forward slippage of piston rod 21 closure valve 1, namely initial bit is valve 1 opening state completely, different linked manner can adjust as required.
Air inflow adjusting part comprises valve positioner 4, first pneumatic relay 41 and the second pneumatic relay 42, first pneumatic relay 41 is corresponding with the first Pneumatic valve 32 to be arranged and is arranged between the first Pneumatic valve 32 and gas source 3, second pneumatic relay 42 is corresponding with the second Pneumatic valve 33 to be arranged and is arranged between the second Pneumatic valve 33 and gas source 3, valve positioner 4 is series at gas source 3 for the first pneumatic relay 32 and the second pneumatic relay 33 provides gas signal, when valve 1 is opened in piston rod 21 postive direction slippage interlock, valve positioner 4 electric while, gas signal is exported to the first pneumatic relay 41 by starting according to the instruction of system, when system inputs the valve opening electrical signal of certain milliampere electric current, electrical signal is converted to gas signal and exports to the first pneumatic relay 41, first pneumatic relay 41 has the function controlling gas source air inflow after gas signal amplifies, and the air inflow after amplifying is passed to forward chamber 22 by the first Pneumatic valve 32, valve 1 is opened gradually, along with the valve opening quiescent current size of system input increases gradually, the air inflow that first pneumatic relay 41 is changed increases gradually, valve 1 is opened into gradually and opens completely, carry out regulating valve 1 aperture thus, oppositely the gas in chamber 23 then outputs to the second pneumatic relay 42 by the second Pneumatic valve 33, the reverse air pressure that second pneumatic relay 42 obtains feeds back on valve positioner 4, and by valve positioner 4 to comparison valve 1 aperture, Correctly adjust is carried out to give vent to anger signal and air inlet signal, part gas can be discharged from the second pneumatic relay 42, realize the fine adjustment of valve 1 open position, and during piston rod 21 postive direction slippage interlock closure valve 1, then can realize the fine adjustment of valve 1 degree of closing position.
First pneumatic relay 41 and be provided with gas holder 5 between the second pneumatic relay 42 and gas source 3, the gas being arranged on gas source when Pneumatic actuator is not also started working of gas holder 5 can pre-position in gas holder 5, once work, just lay in enough tolerance, enter rapidly forward chamber 22, strengthen overall reaction velocity, reach required open position fast, and can be used for collecting the gas of discharging from the second pneumatic relay, the air outlet of gas holder 5 is provided with the second safety check 52 preventing from flowing backwards.
First pneumatic relay 41 and be provided with the first filtering pressure reducing valve 51 between the second pneumatic relay 42 and gas holder 5, while first filtering pressure reducing valve 51 removes the impurity such as oil, water, dirt in pressurized air, the diaphragm of filtering pressure reducing valve 51 is made adjustment automatically, pressure is exported stably, ensure pressure stability, avoid pneumatic relay by gas shock, considerably increase the working life of Pneumatic actuator.
Valve positioner 4 and be provided with the second filtering pressure reducing valve 34 between solenoid valve 31 and gas source 3, while second filtering pressure reducing valve 34 removes the impurity such as oil, water, dirt in pressurized air, the diaphragm of filtering pressure reducing valve 34 is made adjustment automatically, pressure is exported stably, ensure pressure stability, avoid valve positioner 4 and solenoid valve 31 by gas shock, considerably increase the working life of Pneumatic actuator.
Claims (4)
1. one kind has the double-action Pneumatic actuator of adjustment and failure safe function, comprise the double-acting actuating mechanism of valve and control valve opening and closing, described double-acting actuating mechanism comprises the piston cavity be installed on valve and the airflow control mechanism controlling air-flow turnover piston cavity, the valve rod of control valve opening and closing is provided with in described valve, be provided with in described piston cavity by air propels and the piston rod linked with valve rod, comprise postive direction in described piston cavity promote the forward chamber of piston rod and promote the reverse chamber of piston rod in the other direction, described airflow control mechanism comprises gas source, it is characterized in that: described airflow control mechanism also comprises solenoid valve, first Pneumatic valve, second Pneumatic valve and air inflow adjusting part, first described Pneumatic valve one end is connected with forward chamber, switch between the other end and air inflow adjusting part and the external world, second described Pneumatic valve one end is connected with reverse chamber, switch between the other end and air inflow adjusting part and gas source, described solenoid valve is series at gas source and provides gas signal for the first Pneumatic valve and the second Pneumatic valve, described air inflow adjusting part is arranged at the first Pneumatic valve and controls gas flow between the second Pneumatic valve and gas source, the first Pneumatic valve and the second Pneumatic valve gas signal is given during described solenoid valves, air inflow adjusting part and forward chamber are carried out UNICOM by the first Pneumatic valve, air inflow adjusting part and reverse chamber are carried out UNICOM by the second Pneumatic valve, gas blackout when described solenoid valve dead electricity or arrow gas, the external world and forward chamber are carried out UNICOM by the first Pneumatic valve, gas source and reverse chamber are carried out UNICOM by the second Pneumatic valve, described air inflow adjusting part comprises valve positioner, first pneumatic relay and the second pneumatic relay, the first described pneumatic relay is corresponding with the first Pneumatic valve to be arranged and is arranged between the first Pneumatic valve and gas source, the second described pneumatic relay is corresponding with the second Pneumatic valve to be arranged and is arranged between the second Pneumatic valve and gas source, described valve positioner is series at gas source for the first pneumatic relay and the second pneumatic relay provides gas signal.
2. according to claim 1 a kind ofly have adjustment and the double-action Pneumatic actuator of failure safe function, it is characterized in that: the first described pneumatic relay and be provided with gas holder between the second pneumatic relay and gas source.
3. according to claim 2 a kind ofly have adjustment and the double-action Pneumatic actuator of failure safe function, it is characterized in that: the first described pneumatic relay and be provided with the first filtering pressure reducing valve between the second pneumatic relay and gas holder.
4. a kind of according to claim 1 or 2 or 3 has the double-action Pneumatic actuator of adjustment and failure safe function, it is characterized in that: described valve positioner and be provided with the second filtering pressure reducing valve between solenoid valve and gas source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410119414.6A CN103899829B (en) | 2014-03-27 | 2014-03-27 | A kind of double-action Pneumatic actuator with adjustment and failure safe function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410119414.6A CN103899829B (en) | 2014-03-27 | 2014-03-27 | A kind of double-action Pneumatic actuator with adjustment and failure safe function |
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| CN103899829A CN103899829A (en) | 2014-07-02 |
| CN103899829B true CN103899829B (en) | 2016-03-30 |
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| CN201410119414.6A Active CN103899829B (en) | 2014-03-27 | 2014-03-27 | A kind of double-action Pneumatic actuator with adjustment and failure safe function |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907518B (en) * | 2017-04-21 | 2023-09-12 | 杭州富尚阀门有限公司 | Double-acting pneumatic reset electric open type actuating mechanism |
| CN110500418B (en) * | 2019-08-07 | 2024-04-12 | 安徽省屯溪高压阀门股份有限公司 | Automatic control large-caliber quick-cutting corrugated pipe gate valve |
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| CN201954079U (en) * | 2011-04-18 | 2011-08-31 | 浙江超达阀门股份有限公司 | Control device for guaranteeing operation safety of pneumatic valve |
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| CN103438265A (en) * | 2013-08-16 | 2013-12-11 | 上海汇益控制系统股份有限公司 | Adjusting type hydraulic control butterfly valve actuator |
| CN103629421A (en) * | 2013-12-06 | 2014-03-12 | 上海一核阀门制造有限公司 | Valve control system |
| CN203770804U (en) * | 2014-03-27 | 2014-08-13 | 超达阀门集团股份有限公司 | Double-acting pneumatic device with adjustment and fault security functions |
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2014
- 2014-03-27 CN CN201410119414.6A patent/CN103899829B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5337788A (en) * | 1993-10-22 | 1994-08-16 | Robertshaw Controls Company | Pneumatic valve with slow start and quick exhaust |
| CN201992174U (en) * | 2010-12-23 | 2011-09-28 | 天津精通控制仪表技术有限公司 | Air line structure of air storage type pneumatic actuating mechanism |
| CN201954079U (en) * | 2011-04-18 | 2011-08-31 | 浙江超达阀门股份有限公司 | Control device for guaranteeing operation safety of pneumatic valve |
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| CN103899829A (en) | 2014-07-02 |
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Denomination of invention: Double-acting pneumatic device with adjustment and fault security functions Effective date of registration: 20200416 Granted publication date: 20160330 Pledgee: China Minsheng Banking Corp Wenzhou branch Pledgor: CHAODA VALVE GROUP Co.,Ltd. Registration number: Y2020330000169 |