CN101858458B - Pneumatic executor for driving valve - Google Patents
Pneumatic executor for driving valve Download PDFInfo
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- CN101858458B CN101858458B CN2010101997550A CN201010199755A CN101858458B CN 101858458 B CN101858458 B CN 101858458B CN 2010101997550 A CN2010101997550 A CN 2010101997550A CN 201010199755 A CN201010199755 A CN 201010199755A CN 101858458 B CN101858458 B CN 101858458B
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- piston
- valve
- inner chamber
- exocoel
- cylinder block
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Abstract
The invention relates to a pneumatic executor for driving a valve, which comprises a cylinder body, a piston arranged in the cylinder body, a limit mechanism of the piston, end covers arranged at two ends of the cylinder body, a transmission mechanism for connecting the piston and an executor shaft driven by the transmission mechanism, wherein the cylinder body is separated into an inner cavity and an outer cavity by the piston, and the inner cavity and the outer cavity are connected with an air source control valve through an air passage. The pneumatic executor is characterized in that the wall of the inner cavity is provided with a vent hole communicated with the atmosphere, a gap is reserved between the hole position of the inner cavity and the limit position of the piston stroke, the area of the hole is not less than 50 percent of the area of the piston, preferably over 1 percent of the area of the piston, and a control valve is arranged outside the vent hole. The opening-closing of the vent hole control valve and linked control of air connection and disconnection of the inner and outer cavities can realize quick communication among the inner and outer cavities, the air source and the atmosphere so as to quickly open and close a butterfly valve and a ball valve according to a set motion order. The pneumatic executor can be widely applied to a driving process of various valves with large calibers of over 200 millimeters.
Description
Technical field
The present invention relates to a kind of pneumatic actuator of valve, particularly about a kind of pneumatic actuator that drives large bore valves more than 200 millimeters.
Background technique
The pneumatic actuator of valves such as the existing driving butterfly valve in market, ball valve is generally cylinder piston structure; Utilize gas pressure to promote piston and in cylinder, do straight line motion, utilize structures such as gear, tooth bar, shift fork, link rod again the translation of piston rotation for the final controlling element axle.The final controlling element axle outputs power on the valve rod through coupling drive again, rotates thereby drive valve.Do not bear moment of flexure for making the final controlling element axle only bear moment of torsion, the piston of two relative movement is generally arranged in the pneumatic actuator, the actuate actuators axle of symmetry.These two pistons are divided into two isobaric exocoel and inner chambers that are communicated with cylinder.
Because the power resources of traditional, pneumatic final controlling element are in the draught head of cylinder cavity inner carrier both sides, so its power size is decided by the source of the gas supply gas pressure, and its movement speed then is subject to the speed that cylinder two chambeies charge and discharge gas.Because valve is big more; Need the cylinder diameter of pneumatic actuator also big more, corresponding air consumption also increases thereupon, yet the aspirating pipeline that matches with pneumatic actuator can not proportional amplification; From the also unsuitable proportional amplification of cost consideration, and the resistance of supplying gas also receives the influence of pipeline length.The supply gas factor of speed of comprehensive these influences has caused existing pneumatic actuator driving minor valve, and during like the valve below the DN150, execution speed is very fast, and then speed is very slow when driving big valve.Drive DN150 center line wafer type butterfly valve like existing pneumatic actuator and carry out and once open or about 0.3-0.5 of time second of closing motion, driving the DN250 butterfly valve action time once then needs about 10 seconds, and driving the DN400 valve event once need about 30 second.Valve big-movement more is slow more.
Summary of the invention
To the problems referred to above, the present invention proposes a kind of pneumatic actuator that can drive the large bore valves high speed motion.
For realizing above purpose, the present invention takes following technological scheme: a kind of pneumatic actuator that drives valve comprises cylinder block; Be arranged on the piston in the said cylinder block; The position-limit mechanism of said piston is arranged on the end cap at said cylinder block two ends, connects the driving mechanism of said piston and the final controlling element axle that is driven by said driving mechanism; Said cylinder block is separated into inner chamber and exocoel by piston, and said inside and outside chamber is connected with the source of the gas control valve through air flue respectively; It is characterized in that: offer the vent that is communicated with atmosphere on the wall of said inner chamber; Leave the gap between the limit position of its position of opening and said piston stroke; Perforated area is not less than 5 ‰ of piston area, and the best is more than 1% of piston area, and said vent is outside equipped with control valve.
When exocoel to limit position is compressed in said piston translation, leave the pressure accumulation space between the end cap that said piston and its close on.
When driven valve was ball valve, said pressure accumulation spatial volume was not less than 50% of piston area * piston stroke, and best pressure accumulation spatial volume is greater than 80% of piston area * piston stroke.
When driven valve was butterfly valve, said pressure accumulation spatial volume was not less than 20% of piston area * piston stroke, and best pressure accumulation spatial volume is greater than 40% of piston area * piston stroke.
Said inside and outside chamber has following three kinds of air feed states: 1) inner chamber connects source of the gas, and exocoel connects atmosphere; 2) inside and outside chamber all connects source of the gas; 3) inner chamber cuts off source of the gas and connects atmosphere, and exocoel connects source of the gas.
The operation of said three kinds of air feed states order is as follows: A, air feed switch to state 1), said piston moves to said exocoel least limit position; B, air feed switch to state 2), said piston keeps motionless because of position-limit mechanism with by the acting in conjunction of the hermetic resistance of driving valve, and said inside and outside chamber was all held pressurized gas was arranged this moment; C, air feed switch to state 3); Open the vent control valve simultaneously; Inner chamber air pressure moment this moment drops to normal pressure; The said piston of the rapid promotion of high pressure air cognition in the said exocoel drives said driving mechanism and drives said final controlling element axle high-speed rotation, drives by the driving valve through the valve rod that is connected with said final controlling element axle.
Be divided into two cavitys through a said piston in the said cylinder block, define one of them and be inner chamber, define another and be exocoel.
Inner chamber and two exocoels of two ends in the middle of being divided into through two said pistons in the said cylinder block through said air flue connection.
The present invention is owing to take above technological scheme, and it has the following advantages: 1, movement speed of the present invention does not receive cylinder to charge and discharge the restriction of gas speed, and the movement speed of valve is got a qualitative improvement.2, the present invention is owing to be provided with a vent on cylinder body, therefore when it is opened, have the interior pressure of the cavity of vent can moment from high pressure drop to normal pressure.3, the present invention is because exocoel is provided with the pressure accumulation space, so this device is when doing high speed motion, and the pressurized gas that hold in advance can move to inner chamber by accelerating piston, and the high-speed motion of piston can drive final controlling element axle high-speed rotation through driving mechanism.4, owing to the keying of vent control valve among the present invention and the coherent and breathe control interlock in inside and outside chamber; Therefore can realize that inside and outside chamber is communicated with the quick of source of the gas and atmosphere, thereby can accomplish the unlatching of butterfly valve and the switching motion of ball valve fast by the sequence of movement of setting.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a schematic diagram of the present invention
Fig. 3 is the present invention and the whole system's connection diagram of peripheral unit
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Like Fig. 1, shown in Figure 2, the present invention includes a cylinder block 1, the two ends of cylinder block 1 are fixedly connected an end cover 2 respectively, are provided with two-piston 3 and corresponding position-limit mechanism 4 in the cylinder block 1, and two-piston 3 is divided into an inner chamber A and two exocoel B with cylinder block 1.Cylinder block 1 is provided with two air flues 5,6, and inner chamber A and exocoel B are respectively arranged with air flue 5,6.On the wall of inner chamber A, have a vent 7; The center of cylinder block 1 is provided with a final controlling element axle 8; The outer rim of final controlling element axle 8 is provided with a gear 9; Be symmetrically arranged with two tooth bars, 10, two tooth bars 10 in the inner of two-piston 3 and be engaged on the both sides of gear 9 respectively, final controlling element axle 8 is fixedly connected the valve rod of a butterfly valve 11. Air flue 5,6 is inner chamber A and exocoel B air feed through a source of the gas control valve 12, connects joint 13 in the outside of vent 7 through one and connects a control valve 14, connects a silencing apparatus 15 at the top of control valve 14.The inner chamber A of cylinder block 1 and two exocoel B have following three kinds of aeration status through the operation of source of the gas control valve 12 and control valve 14:
A, inner chamber are communicated with source of the gas, and two exocoels are communicated with atmosphere;
B, inner chamber and two exocoels all are communicated with source of the gas;
C, inner chamber cut off source of the gas and are communicated with atmosphere, and two exocoels are communicated with source of the gas;
In the foregoing description, among each exocoel B, the minimum space from end cover 2 to piston 3 is the pressure accumulation space, and the pressure accumulation space is confirmed according to function requirement, manufacture cost, production technology, installation conditions etc.For driving valve is ball valve, the pressure accumulation space need be not less than 50% of piston area * piston stroke, is butterfly valve for driving valve, and the pressure accumulation space need be not less than 20% of piston area * piston stroke.For reaching best snap effect, be ball valve for driving valve, the pressure accumulation space is not less than 80% of piston area * piston stroke, is butterfly valve for driving valve, and the pressure accumulation space is not less than 40% of piston area * piston stroke.
In the foregoing description, leave the gap between the position of opening of vent 8 and the limit position of piston stroke, perforated area is not less than 5 ‰ of piston area, and the best is more than 1% of piston area.
In the foregoing description, be connected the driving mechanism between two-piston 3 and the final controlling element axle 8, except that the engagement of the wheel and rack of having described, can also adopt driving mechanisms such as other various bracing structures commonly used, shift fork structure.
In the foregoing description, position-limit mechanism can also adopt other common structural, like push rod structure, jackscrew structure, cam structure etc.For the impact force that the damper piston high-speed motion produces, prolong the life-span of final controlling element, can be provided with elastic element on the position-limit mechanism 4, like pressure spring, spring sheet etc.
When the present invention works, undertaken by following sequence of movement:
1, source of the gas is ventilated to inner chamber A through source of the gas control valve 12, two exocoel B and atmosphere; This moment, two-piston 3 was to two side shiftings, until the limit position that arrives the two exocoel B outside;
2, source of the gas is ventilated to inner chamber A and two exocoel B through source of the gas control valve 12 simultaneously; This moment, piston was motionless because of the limit position that the hermetic resistance effect of position-limit mechanism 4 and valve 14 remains on two exocoel B;
3, source of the gas continues ventilation through source of the gas control valve 12 to two exocoel B, opens control valve 14 simultaneously the vent on the cylinder block 17 is communicated with atmosphere; Air pressure moment of inner chamber A this moment drops to normal pressure, holds the pressurized gas that have in the pressure accumulation space of two exocoel B, can promote two-piston 3 rapidly and move to inner chamber A.The high-speed motion of above-mentioned two-piston 3 can drive final controlling element axle 9 high-speed rotation through driving mechanism, thereby the opening time of realizing butterfly valve 12 is 0.3 second.
Claims (10)
1. pneumatic actuator that drives valve; Comprise cylinder block, be arranged on the piston in the said cylinder block, the position-limit mechanism of said piston; Be arranged on the end cap at said cylinder block two ends; Connect the driving mechanism of said piston and the final controlling element axle that is driven by said driving mechanism, said cylinder block is separated into inner chamber and exocoel by piston, and said inside and outside chamber is connected with the source of the gas control valve through air flue respectively; It is characterized in that: offer the vent that is communicated with atmosphere on the wall of said inner chamber, leave the gap between the limit position of its position of opening and said piston stroke, perforated area is not less than 5 ‰ of piston area, and said vent is outside equipped with control valve.
2. a kind of pneumatic actuator that drives valve according to claim 1 is characterized in that: when exocoel to limit position is compressed in said piston translation, leave the pressure accumulation space between the end cap that said piston and its close on.
3. a kind of pneumatic actuator that drives valve according to claim 2 is characterized in that: when driven valve was ball valve, said pressure accumulation spatial volume was not less than 50% of piston area * piston stroke.
4. a kind of pneumatic actuator that drives valve according to claim 2 is characterized in that: when driven valve was butterfly valve, said pressure accumulation spatial volume was not less than 20% of piston area * piston stroke.
5. according to claim 1 or 2 or 3 or 4 described a kind of pneumatic actuators that drive valve, it is characterized in that: said inside and outside chamber has following three kinds of air feed states:
1) inner chamber connects source of the gas, and exocoel connects atmosphere;
2) inside and outside chamber all connects source of the gas;
3) inner chamber cuts off source of the gas and connects atmosphere, and exocoel connects source of the gas.
6. a kind of pneumatic actuator that drives valve according to claim 5 is characterized in that: the operation of said three kinds of air feed states order as follows:
A, air feed switch to state 1), said piston moves to said exocoel least limit position;
B, air feed switch to state 2), said piston keeps motionless because of position-limit mechanism with by the acting in conjunction of the hermetic resistance of driving valve, and said inside and outside chamber was all held pressurized gas was arranged this moment;
C, air feed switch to state 3); Open the vent control valve simultaneously; Inner chamber air pressure moment this moment drops to normal pressure; The said piston of the rapid promotion of high pressure air cognition in the said exocoel drives said driving mechanism and drives said final controlling element axle high-speed rotation, drives by the driving valve through the valve rod that is connected with said final controlling element axle.
7. according to claim 1 or 2 or 3 or 4 or 6 described a kind of pneumatic actuators that drive valve, it is characterized in that: be divided into two cavitys through a said piston in the said cylinder block, define one of them and be inner chamber, define another and be exocoel.
8. a kind of pneumatic actuator that drives valve according to claim 5 is characterized in that: be divided into two cavitys through a said piston in the said cylinder block, define one of them and be inner chamber, define another and be exocoel.
9. according to claim 1 or 2 or 3 or 4 or 6 described a kind of pneumatic actuators that drive valve, it is characterized in that: inner chamber and two exocoels of two ends in the middle of being divided into through two said pistons in the said cylinder block through said air flue connection.
10. a kind of pneumatic actuator that drives valve according to claim 5 is characterized in that: inner chamber and two exocoels of two ends through said air flue connection in the middle of being divided into through two said pistons in the said cylinder block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101997550A CN101858458B (en) | 2010-06-08 | 2010-06-08 | Pneumatic executor for driving valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101997550A CN101858458B (en) | 2010-06-08 | 2010-06-08 | Pneumatic executor for driving valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858458A CN101858458A (en) | 2010-10-13 |
| CN101858458B true CN101858458B (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101997550A Expired - Fee Related CN101858458B (en) | 2010-06-08 | 2010-06-08 | Pneumatic executor for driving valve |
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| Country | Link |
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| CN (1) | CN101858458B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103750556B (en) * | 2011-12-31 | 2016-06-29 | 贵州中烟工业有限责任公司 | A kind of filter maker plasticizer auto switching system |
| CN103471836B (en) * | 2013-09-22 | 2016-04-06 | 浙江博恩自控阀门有限公司 | A kind of fatigue strength tester of simulation torque |
| CN103672031B (en) * | 2013-12-09 | 2015-10-14 | 四川航天电液控制有限公司 | Hydraulic control three-way ball valve |
| CN104806771B (en) * | 2015-04-18 | 2017-10-24 | 温州巴尔阀门有限公司 | A kind of pneumatic expansion formula butterfly valve |
| CN106051280B (en) * | 2016-08-02 | 2018-06-22 | 成都兹维克阀门有限公司 | Pressure buffer pneumatic actuator |
| CN110409970A (en) * | 2019-06-18 | 2019-11-05 | 沪东中华造船(集团)有限公司 | A kind of automatic switch device and its installation method for ship fire resistant doorsets |
| CN112443700B (en) * | 2019-09-03 | 2022-09-13 | 大连中和聚能自动控制系统有限公司 | Automatic control device for turn-off of high-pressure auxiliary valve |
| CN110595720B (en) * | 2019-09-16 | 2020-11-24 | 华中科技大学 | Rapid switch valve device for wind tunnel application and opening method thereof |
| CN114396505A (en) * | 2021-12-28 | 2022-04-26 | 重庆川维石化工程有限责任公司 | Volatile organic gas emission device integrating nitrogen supplement and gas phase pressure balance functions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3537358A (en) * | 1967-11-25 | 1970-11-03 | Bunyard Alan D | Rotary actuators |
| CN2048147U (en) * | 1989-03-09 | 1989-11-22 | 林纪仁 | Aerodynamic v-type regulating notched ball valve |
| CN2241804Y (en) * | 1995-11-17 | 1996-12-04 | 张雄飞 | Opening and closing drive device for pneumatic reciprocating valve |
| CN101432565A (en) * | 2006-04-05 | 2009-05-13 | 美卓自动化美国公司 | Fluid powered dual-piston actuator with efficient fluid porting and method of implementation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6511040B2 (en) * | 1997-10-07 | 2003-01-28 | Murray J. Gardner | Pneumatic actuator |
| KR100512751B1 (en) * | 2003-04-03 | 2005-09-05 | 유근형 | Actuator |
| WO2007057927A1 (en) * | 2005-11-15 | 2007-05-24 | Actuatech S.R.L. | Pneumatic actuator with stroke regulator |
-
2010
- 2010-06-08 CN CN2010101997550A patent/CN101858458B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3537358A (en) * | 1967-11-25 | 1970-11-03 | Bunyard Alan D | Rotary actuators |
| CN2048147U (en) * | 1989-03-09 | 1989-11-22 | 林纪仁 | Aerodynamic v-type regulating notched ball valve |
| CN2241804Y (en) * | 1995-11-17 | 1996-12-04 | 张雄飞 | Opening and closing drive device for pneumatic reciprocating valve |
| CN101432565A (en) * | 2006-04-05 | 2009-05-13 | 美卓自动化美国公司 | Fluid powered dual-piston actuator with efficient fluid porting and method of implementation |
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| Publication number | Publication date |
|---|---|
| CN101858458A (en) | 2010-10-13 |
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Granted publication date: 20120222 |