CN103899829A - Double-acting pneumatic device with adjustment and fault security functions - Google Patents
Double-acting pneumatic device with adjustment and fault security functions Download PDFInfo
- Publication number
- CN103899829A CN103899829A CN201410119414.6A CN201410119414A CN103899829A CN 103899829 A CN103899829 A CN 103899829A CN 201410119414 A CN201410119414 A CN 201410119414A CN 103899829 A CN103899829 A CN 103899829A
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- valve
- pneumatic
- gas
- air inflow
- gas source
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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
Abstract
The invention relates to a double-acting pneumatic device with adjustment and fault security functions. The double-acting pneumatic device comprises a valve, a piston chamber and an airflow control mechanism. A piston rod in linkage with a valve stem is arranged in the piston chamber which includes a forward chamber and a reverser chamber. The airflow control mechanism comprises a main air source, an electromagnetic valve, a first pneumatic control valve, a second pneumatic control valve and an air inflow adjustment assembly. One end of the first pneumatic control valve is connected with the forward chamber, the other end of the same is switched between the air inflow adjustment assembly and the outside world, one end of the second pneumatic control valve is connected with the reverser chamber, the other end of the same is switched between the air inflow adjustment assembly and the main air source, the electromagnetic valve supplies air signals for the first pneumatic control valve and the second pneumatic control valve, and the air inflow adjustment assembly controls air flow for the first pneumatic control valve and the second pneumatic control valve. By the arrangement, the valve opening position can be adjusted and the valve can return the initial position in time of sudden power failure and air interruption.
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 adjusting and failure safe function.
Background technique
At present, along with industrial fast development, requirement to valve is also more and more higher, particularly require also more and more higher for valve automation control, not only require valve to there is emergency cut-off function, or emergency closing function, or valve position regulatory function, but require a certain deck valve door must possess emergency opening, emergency cut-off, automatically regulate and the several functions of failure safe return.
Double-action Pneumatic actuator comprises the double-acting actuating mechanism that valve and control valve body open and close, double-acting actuating mechanism comprises the piston cavity being installed on valve and controls the airflow control mechanism of air-flow turnover piston cavity, in valve, be provided with the valve rod that control valve opens and closes, in piston cavity, be provided with by air-flow and promote and link and open and close the piston rod of valve with valve rod, conventional airflow control mechanism is realized valve by electrically-controlled valve control gas turnover piston cavity and is opened fast, close, having a power failure suddenly but can not realize, while the failure condition such as stopping the supple of gas or steam, valve can not be got back to the home of system requirements automatically, and do not possess regulatory function, thereby, often cause insufficiency of function at crucial moment, thereby may cause great accident and disaster.
Summary of the invention
The deficiency existing for prior art, the object of the present invention is to provide a kind of in the time having a power failure, stop the supple of gas or steam suddenly valve auto back to initial bit and the double-action Pneumatic actuator with adjusting and failure safe function that can regulating valve enable possition.
For achieving the above object, the invention provides following technological scheme: comprise the double-acting actuating mechanism that valve and control valve open and close, described double-acting actuating mechanism comprises the piston cavity being installed on valve and controls the airflow control mechanism of air-flow turnover piston cavity, in described valve, be provided with the valve rod that control valve opens and closes, in described piston cavity, be provided with by air-flow promote and with the piston rod of valve rod interlock, in described piston cavity, comprise the reverse chamber that postive direction promotes the forward chamber of piston rod and promotes 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, the first Pneumatic valve, the second Pneumatic valve and air inflow adjusting part, first described Pneumatic valve one end is connected with forward chamber, between the other end and air inflow adjusting part and the external world, switch, second described Pneumatic valve one end is connected with reverse chamber, between the other end and air inflow adjusting part and gas source, switch, 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 between the first Pneumatic valve and the second Pneumatic valve and gas source and controls gas flow, described solenoid valve gives the first Pneumatic valve and the second Pneumatic valve gas signal while energising, 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 to run into have a power failure and the urgency of stopping the supple of gas or steam, the solenoid valve that is series at gas source all cannot continue output gas signal to Pneumatic valve, cause Pneumatic valve in the time not being controlled the gas signal of its state self-return to initial position, in the specific embodiment of the invention, the air inflow in the first Pneumatic valve control forward chamber, the air inflow in the second reverse chamber of Pneumatic valve control, when normal work, when solenoid valve energising, give the first Pneumatic valve and the second Pneumatic valve gas signal, 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, be subject to from the gas of gas source after the adjusting of air inflow adjusting part again entering respectively forward chamber and reverse chamber by the first Pneumatic valve and the second Pneumatic valve, promote the piston rod with valve rod interlock, by the different air inflow in both sides, rotate different angles with ovable valve stem valve is adjusted to required aperture, and solenoid valve is prominent when meeting Loss of power failure and vowing gas fault gas blackout, 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 discharged to the external world rapidly, and reverse chamber is direct and the maximum rate air inlet of gas source UNICOM, both coordinate promotion piston rod to be repositioned to rapidly initial bit, be that valve is classified as to initial bit, the forward slippage of piston rod can be linked and open valve, be that initial bit is the complete closed state of valve, also closure valve can be linked the forward slippage of piston rod, be that initial bit is the complete opening state of valve, different interlock modes can be adjusted as required.
The present invention is further set to: 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 and provides gas signal for the first pneumatic relay and the second pneumatic relay.
By adopting technique scheme, in the time that valve is opened in piston rod postive direction slippage interlock, valve positioner obtains electric time, to start to export gas signal according to the instruction of system to the first pneumatic relay, when the certain milliampere electric current of system input open valve electrical signal time, electrical signal is converted to gas signal and exports to the first pneumatic relay, the first pneumatic relay has the function of 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 quiescent current size of opening of system input increases gradually, the air inflow of the first pneumatic relay conversion increases gradually, valve is opened into completely and opens gradually, carry out thus controlling opening of valve, oppositely the gas in chamber outputs to the second pneumatic relay by the second Pneumatic valve, the reverse air pressure that the second pneumatic relay obtains feeds back on valve positioner, and by valve positioner to give vent to anger signal and air inlet signal to comparison valve opening carry out Correctly adjust, part gas can be discharged from the second pneumatic relay, realize the fine adjustment of valve opening position, and when piston rod postive direction slippage interlock closure valve, can realize the fine adjustment of valve degree of closing position.
The present invention is further set to: between the first described pneumatic relay and the second pneumatic relay and gas source, be provided with gas holder.
By adopting technique scheme, when being arranged on Pneumatic actuator and also not starting working of gas holder, the gas of gas source can pre-position in gas holder, Once you begin work, just lay in enough tolerance, enter rapidly forward chamber, strengthen overall reaction velocity, reach fast required aperture position, and can be used for collecting the gas of discharging from the second pneumatic relay.
The present invention is further set to: between the first described pneumatic relay and the second pneumatic relay and gas holder, be provided with the first filtering pressure reducing valve.
By adopting technique scheme, when the first filtering pressure reducing valve is removed the impurity such as oil in pressurized air, water, dirt, the diaphragm of filtering pressure reducing valve is made adjustment automatically, pressure is exported stably, guarantee pressure stability, avoid pneumatic relay by gas shock, greatly increased the working life of Pneumatic actuator.
The present invention is further set to: between described valve positioner and solenoid valve and gas source, be provided with the second filtering pressure reducing valve.
By adopting technique scheme, when the second filtering pressure reducing valve is removed the impurity such as oil in pressurized air, water, dirt, the diaphragm of filtering pressure reducing valve is made adjustment automatically, pressure is exported stably, guarantee pressure stability, avoid valve positioner and solenoid valve by gas shock, greatly increased 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 adjusting and failure safe function, comprise the double-acting actuating mechanism that valve 1 and control valve 1 open and close, double-acting actuating mechanism comprises the piston cavity 2 being installed on valve 1 and controls the airflow control mechanism of air-flow turnover piston cavity 2, in valve 1, be provided with the valve rod 11 that control valve 1 opens and closes, in piston cavity 2, be provided with the piston rod 21 that promotes and link with valve rod 11 by air-flow, in piston cavity 2, comprise the reverse chamber 23 that postive direction promotes the forward chamber 22 of piston rod and promotes piston rod in the other direction, and in embodiment, piston cavity 2 is two and is arranged at respectively the two ends of piston rod 21, on piston rod 21, be provided with the piston plate 211 that slippage coordinates, two synchronous acceleration of piston cavity 2 promote piston rod 21 slippages, therefore forward chamber 22 arranges respectively with relative piston plate 211 both sides, reverse chamber 23, and quantity is two, airflow control mechanism comprises gas source 3, gas source 3 air outlets are provided with the first safety check 35 that prevents refluence, airflow control mechanism also comprises solenoid valve 31, the first Pneumatic valve 32, the second Pneumatic valve 33 and air inflow adjusting part, first Pneumatic valve 32 one end are connected with forward chamber 22, between the other end and air inflow adjusting part and the external world, switch, on the first Pneumatic valve 32, be provided with air outlet 321 for being connected with the external world, second Pneumatic valve 33 one end are connected with reverse chamber 23, between the other end and air inflow adjusting part and gas source 3, switch, 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 between the first Pneumatic valve 32 and the second Pneumatic valve 33 and gas source 3 and controls gas flow, solenoid valve 31 gives the first Pneumatic valve 32 and the second Pneumatic valve 33 gas signals while energising, 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 to run into have a power failure and the urgency of stopping the supple of gas or steam, the solenoid valve 31 that is series at gas source 3 all cannot continue output gas signal to Pneumatic valve, cause Pneumatic valve in the time not being controlled the gas signal of its state self-return to initial position, in the specific embodiment of the invention, the first Pneumatic valve 32 is controlled the air inflow in forward chamber 22, the second Pneumatic valve 33 is controlled the air inflow in reverse chamber 23, when normal work, solenoid valve 31 gives the first Pneumatic valve 32 and the second Pneumatic valve 33 gas signals while energising, 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, be subject to from the gas of gas source 3 after the adjusting of air inflow adjusting part again entering respectively forward chamber 22 and reverse chamber 23 by the first Pneumatic valve 32 and the second Pneumatic valve 33, promote the piston rod 21 linking with valve rod 11, by the different air inflow in both sides, rotate different angles with ovable valve stem 11 valve 1 is adjusted to required aperture, and solenoid valve 31 is prominent when meeting Loss of power failure and vowing gas fault gas blackout, 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 discharged to the external world rapidly, and reverse chamber 23 is direct and the maximum rate air inlet of gas source 3 UNICOMs, both coordinate promotion piston rod 21 to be repositioned to rapidly initial bit, be that valve is classified as to initial bit, the forward slippage of piston rod 21 can be linked and open valve 1, be that initial bit is the complete closed state of valve 1, also closure valve 1 can be linked the forward slippage of piston rod 21, be that initial bit is the complete opening state of valve 1, different interlock modes can be adjusted as required.
Air inflow adjusting part comprises valve positioner 4, the first pneumatic relay 41 and the second pneumatic relay 42, the 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, the 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 and provides gas signal for the first pneumatic relay 32 and the second pneumatic relay 33, in the time that valve 1 is opened in piston rod 21 postive direction slippage interlocks, valve positioner 4 electric time, to start to export gas signal according to the instruction of system to the first pneumatic relay 41, when the certain milliampere electric current of system input open valve electrical signal time, electrical signal is converted to gas signal and exports to the first pneumatic relay 41, the first pneumatic relay 41 has the function of 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 quiescent current size of opening of system input increases gradually, the air inflow that the first pneumatic relay 41 is changed increases gradually, valve 1 is opened into completely and opens gradually, carry out thus regulating valve 1 aperture, oppositely the gas in chamber 23 outputs to the second pneumatic relay 42 by the second Pneumatic valve 33, the reverse air pressure that the second pneumatic relay 42 obtains feeds back on valve positioner 4, and by valve positioner 4 give vent to anger signal and air inlet signal carried out to Correctly adjust to comparison valve 1 aperture, part gas can be discharged from the second pneumatic relay 42, realize the fine adjustment of valve 1 aperture position, and when piston rod 21 postive direction slippages interlocks closure valve 1, can realize the fine adjustment of valve 1 degree of closing position.
Between the first pneumatic relay 41 and the second pneumatic relay 42 and gas source 3, be provided with gas holder 5, when being arranged on Pneumatic actuator and also not starting working of gas holder 5, the gas of gas source can be in the interior pre-position of gas holder 5, Once you begin work, just lay in enough tolerance, enter rapidly forward chamber 22, strengthen overall reaction velocity, reach fast required aperture position, 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 that prevents refluence.
Between the first pneumatic relay 41 and the second pneumatic relay 42 and gas holder 5, be provided with the first filtering pressure reducing valve 51, when the first filtering pressure reducing valve 51 is removed the impurity such as oil in pressurized air, water, dirt, the diaphragm of filtering pressure reducing valve 51 is made adjustment automatically, pressure is exported stably, guarantee pressure stability, avoid pneumatic relay by gas shock, greatly increased the working life of Pneumatic actuator.
Between valve positioner 4 and solenoid valve 31 and gas source 3, be provided with the second filtering pressure reducing valve 34, when the second filtering pressure reducing valve 34 is removed the impurity such as oil in pressurized air, water, dirt, the diaphragm of filtering pressure reducing valve 34 is made adjustment automatically, pressure is exported stably, guarantee pressure stability, avoid valve positioner 4 and solenoid valve 31 by gas shock, greatly increased the working life of Pneumatic actuator.
Claims (5)
1. one kind has the double-action Pneumatic actuator of adjusting and failure safe function, comprise the double-acting actuating mechanism that valve and control valve open and close, described double-acting actuating mechanism comprises the piston cavity being installed on valve and controls the airflow control mechanism of air-flow turnover piston cavity, in described valve, be provided with the valve rod that control valve opens and closes, in described piston cavity, be provided with by air-flow promote and with the piston rod of valve rod interlock, in described piston cavity, comprise the reverse chamber that postive direction promotes the forward chamber of piston rod and promotes 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, the first Pneumatic valve, the second Pneumatic valve and air inflow adjusting part, first described Pneumatic valve one end is connected with forward chamber, between the other end and air inflow adjusting part and the external world, switch, second described Pneumatic valve one end is connected with reverse chamber, between the other end and air inflow adjusting part and gas source, switch, 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 between the first Pneumatic valve and the second Pneumatic valve and gas source and controls gas flow, described solenoid valve gives the first Pneumatic valve and the second Pneumatic valve gas signal while energising, 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.
2. a kind of double-action Pneumatic actuator with adjusting and failure safe function according to claim 1, it is characterized in that: 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, described valve positioner is series at gas source and provides gas signal for the first pneumatic relay and the second pneumatic relay.
3. a kind of double-action Pneumatic actuator with adjusting and failure safe function according to claim 2, is characterized in that: between the first described pneumatic relay and the second pneumatic relay and gas source, be provided with gas holder.
4. a kind of double-action Pneumatic actuator with adjusting and failure safe function according to claim 3, is characterized in that: between the first described pneumatic relay and the second pneumatic relay and gas holder, be provided with the first filtering pressure reducing valve.
5. according to a kind of double-action Pneumatic actuator with adjusting and failure safe function described in claim 2 or 3 or 4, it is characterized in that: between described valve positioner and solenoid valve and gas source, be provided with the second filtering pressure reducing valve.
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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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| 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 true CN103899829A (en) | 2014-07-02 |
| CN103899829B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907518A (en) * | 2017-04-21 | 2017-06-30 | 杭州富尚阀门有限公司 | Formula executing agency is established in the pneumatic reset of double acting by cable |
| CN110500418A (en) * | 2019-08-07 | 2019-11-26 | 安徽省屯溪高压阀门有限公司 | A kind of automatic control big caliber quick shut-off bellows gate valve |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106907518A (en) * | 2017-04-21 | 2017-06-30 | 杭州富尚阀门有限公司 | Formula executing agency is established in the pneumatic reset of double acting by cable |
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| CN110500418A (en) * | 2019-08-07 | 2019-11-26 | 安徽省屯溪高压阀门有限公司 | A kind of automatic control big caliber quick shut-off bellows gate valve |
| 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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| CN103899829B (en) | 2016-03-30 |
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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 |