CN201386710Y - Intelligent pneumatic adjusting valve - Google Patents
Intelligent pneumatic adjusting valve Download PDFInfo
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- CN201386710Y CN201386710Y CN200920072625U CN200920072625U CN201386710Y CN 201386710 Y CN201386710 Y CN 201386710Y CN 200920072625 U CN200920072625 U CN 200920072625U CN 200920072625 U CN200920072625 U CN 200920072625U CN 201386710 Y CN201386710 Y CN 201386710Y
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- valve
- speed switch
- switch valve
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Abstract
An intelligent pneumatic adjusting valve belongs to the technical fields of hydropneumatics and automatic control and comprises a control unit, and an A/D converter, a D/A converter, a first high-speed switch valve, a second high-speed switch valve, a pneumatic actuator, a valve body and a displacement sensor. An intelligent controller which consists of a single chip microcomputer and a high-speed switch valve is adopted for replacing the original locator to control the pneumatic adjusting valve. The advantages of fast response and long service life of the high-speed valve and the function of flexible programmability of the single chip microcomputer are fully utilized to control the pneumatic adjusting valve. The intelligent pneumatic adjusting valve not only can control valve displacement feedback signals, but also can control certain specific controlled parameters of temperature, chemical composition and the like; and the intelligent pneumatic adjusting valve has the advantages of high control precision, fast response speed, wide dead zone adjustable range, high reliability, strong adaptive capability and the like, can independently constitute a closed loop control system and omit regulating instruments, thus having great economic benefits and being capable of achieving optimal control effects to different controlled objects.
Description
Technical field
The utility model relates to a kind of modulating valve, particularly a kind ofly utilizes single-chip microcomputer as controller; With the intelligent pneumatic power modulating valve of 2/2-way Speed On-off Valve, belong to hydropneumatic and automatic control technology field.
Background technique
In pneumatic control valve, pneumatic actuator is a power with pressurized air, accepts the control signal that regulation meter is sent, and the valve in the regulating and controlling mechanism, baffle plate change the flow of being transferred medium, realize the automation of production process.Positioning work piece is the most important supplementary equipment of pneumatic actuator, and valve, baffle plate in its assurance controlling mechanism are correctly located by the requirement of setting.
Conventional positioning work piece mostly is the mechanical force equilibrium principle, and it adopts nozzle-baffle mechanism, and movable piece is more, and the influence that disturbed by temperature fluctuation, extraneous vibration etc. is environment resistant poor; The elasticity coefficient of spring can change under rugged environment, can cause modulating valve non-linear, causes control of quality to descend; Extraneous vibration passes to equilibrium of forces mechanism, easily causes the drift of component wear and zero point and stroke, also makes positioning work piece be difficult to work; Because the characteristic of nozzle itself, positioning work piece are also wanted a large amount of consumption of compressed air when steady state, if use positioning work piece quantity more, then energy consumption is bigger; And nozzle itself is an incipient fault source, easily blocked by dust or dirt particle, makes the positioning work piece cisco unity malfunction; It is impossible need using special device, non-isolated controlling loop during the manual adjustment of conventional positioning work piece, and the adjustment of zero point and stroke interacts, and must adjust repeatedly, wastes time and energy.
Summary of the invention
For the deficiency and the defective that overcome prior art and make full use of prior art, the utility model utilizes single-chip microcomputer as controller; Control pneumatic control valve with the 2/2-way high-speed switch valve, the intelligent controller that this device is made up of single-chip microcomputer and high-speed switch valve replaces original positioning work piece, have advantages such as control accuracy height, speed of response is fast, the dead band adjustable extent is wide, reliability is high, adaptive ability is strong, thereby improve the stationkeeping ability of valve.It is to be noted especially: the intelligent pneumatic power modulating valve has made full use of the function of single-chip microcomputer, can be according to the direct regulating and controlling valve of the variation of controlled parameter, to form close loop control circuit, saved regulation meter, then can implement best control law as long as program is compiled well, reach best control effect.
The utility model is achieved through the following technical solutions.The utility model comprises control unit, A/D converter, D/A converter, first high-speed switch valve, second high-speed switch valve, pneumatic actuator, valve body, displacement transducer; Wherein control unit comprises receiving module, comparison module, control module.The output terminal of control unit is connected with the control end of first high-speed switch valve with second high-speed switch valve respectively by D/A converter; The suction port of second high-speed switch valve is communicated with the constant voltage source of the gas, and the relief opening of second high-speed switch valve links to each other with the suction port of pneumatic actuator and the suction port of first high-speed switch valve simultaneously, and the relief opening of first high-speed switch valve is communicated with atmosphere; The suction port of pneumatic actuator links to each other with the suction port of first high-speed switch valve, and the rigid disc below the pneumatic actuator diaphragm links to each other with the spool of valve body by connecting rod; Spool in the valve body links to each other with the input end of displacement transducer, and the output terminal of displacement transducer is connected with the input end of control unit through A/D converter; The upper-position unit signal is as setting value, and its output terminal is connected with the input end of control unit through A/D converter.Described receiving module moves feedback signal by the valve position that A/D converter receives valve body, and the valve position value that comparison module moves feedback signal and upper-position unit appointment with the valve position that receives compares; If deviation is relatively arranged, control module is controlled first high-speed switch valve and second high-speed switch valve by D/A converter; Described first high-speed switch valve, second high-speed switch valve are controlled the air inflow and the air displacement of pneumatic actuator respectively, to change the pressure on many springs pneumatic diaphragn actuating mechanism diaphragm, make motion of membrane, thereby drive the valve core movement of valve body.It just can implementing intelligent control to pneumatic control valve, as long as we write a good self learning system to single-chip microcomputer.
To the setting value of controlled parameter and the relation of valve element position, pneumatic actuator has three actions according to upper-position unit, that is: down stroke, up stroke and static.Its concrete working procedure is described below:
Down stroke: receiving module moves feedback signal by the valve position that A/D converter receives the valve body spool, and the valve position value that comparison module moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved the valve position value that feedback signal is set less than upper-position unit, control module transmits control signal by the control end of D/A converter to first high-speed switch valve and second high-speed switch valve, first high-speed switch valve is in closed condition at this moment, and second high-speed switch valve receives control signal and is in opening state; Gas enters pneumatic actuator through second high-speed switch valve, along with the increase that enters gas flow, pneumatic actuator internal gas pressure increases, thereby makes the tension force of the pressure of pneumatic actuator diaphragm upper surface greater than following spring, diaphragm moves downward, and moves downward thereby drive spool; Move the valve position value that feedback signal and upper-position unit set up to the valve position of valve body spool and equate, and air pressure balances each other to the active force of diaphragm and the tension force of following spring, second high-speed switch valve is closed, and gas no longer enters, and spool rests on desired location.
Up stroke: receiving module moves feedback signal by the valve position that A/D converter receives the valve body spool, and the valve position value that comparison module moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved the valve position value that feedback signal is set greater than upper-position unit, control module transmits control signal by the control end of D/A converter to first high-speed switch valve and second high-speed switch valve, second high-speed switch valve is in closed condition at this moment, and first high-speed switch valve receives control signal and is in opening state; Gas flows out pneumatic actuator through first high-speed switch valve, along with the increase of the effluent gases scale of construction, pneumatic actuator internal gas pressure reduces, thereby makes the tension force of the pressure of pneumatic actuator diaphragm upper surface less than following spring, diaphragm moves upward, and moves upward thereby drive spool; Move the valve position value that feedback signal and upper-position unit set up to the valve position of valve body spool and equate, and air pressure balances each other to the active force of diaphragm and the tension force of following spring, first high-speed switch valve is closed, and gas no longer flows out, and spool rests on desired location.
Static: receiving module moves feedback signal by the valve position that A/D converter receives the valve body spool, and the valve position value that comparison module moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved feedback signal and is equaled the valve position value that upper-position unit is set, control module transmits control signal by the control end of D/A converter to first high-speed switch valve and second high-speed switch valve, first high-speed switch valve and second high-speed switch valve all are in closed condition, gas does not enter yet and does not flow out, and spool rests on initial position.
The beneficial effects of the utility model.
The utility model provides a kind of intelligent pneumatic power modulating valve, adopt single-chip microcomputer and two high-speed switch valves combinations, but it the has made full use of speed-sensitive switch response valve is fast, the life-span the is long advantage and the function of single-chip microcomputer flexible programming can be implemented intelligent control to pneumatic control valve; Can select Control Parameter flexibly, the feedback signal that enters receiving module can be a displacement transducer signal, moves feedback signal as the valve position in the utility model, also can be certain concrete controlled parameter such as temperature, chemical composition; The utlity model has advantages such as control accuracy height, speed of response is fast, the dead band adjustable extent is wide, reliability is high, adaptive ability is strong, it can independently form closed loop control system, regulation meter and electropneumatic positioner have been saved, thereby have very big economic benefit, can both reach best control effect for different controlling object.
Description of drawings
Fig. 1 is the structural principle schematic representation of the utility model intelligent pneumatic power modulating valve.
Among the figure: 1 control unit, 2A/D transducer, 3D/A transducer, 4 first high-speed switch valves, 5 second high-speed switch valves, 6 pneumatic actuators, 7 valve bodies, 8 displacement transducers; Wherein 1 control unit comprises 9 receiving modules, 10 comparison modules, 11 control modules.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
As shown in Figure 1, the utility model comprises control unit 1, A/D converter 2, D/A converter 3, first high-speed switch valve 4, second high-speed switch valve 5, pneumatic actuator 6, valve body 7, displacement transducer 8; Wherein control unit 1 comprises receiving module 9, comparison module 10, control module 11.First high-speed switch valve 4 and second high-speed switch valve 5 are the 2/2-way high-speed switch valve, and it forms one group of high-speed switch valve group jointly, and first high-speed switch valve 4 is an outlet valve, and second high-speed switch valve 5 is a suction valve; Pneumatic actuator 6 is many springs pneumatic diaphragn actuating mechanism; Control unit 1 adopts single-chip microcomputer or programmable controller.
The output terminal of control unit 1 is connected with the control end of first high-speed switch valve 4 and second high-speed switch valve 5 respectively by D/A converter 3; The suction port of second high-speed switch valve 5 is communicated with the constant voltage source of the gas, and the relief opening of second high-speed switch valve 5 links to each other with the suction port of pneumatic actuator 6 and the suction port of first high-speed switch valve 4 respectively, and the relief opening of first high-speed switch valve 4 is communicated with atmosphere; The suction port of pneumatic actuator 6 links to each other with the suction port of first high-speed switch valve 4, and the rigid disc below pneumatic actuator 6 diaphragms links to each other by the spool of connecting rod with valve body 7; Spool in the valve body 7 links to each other with the input end of displacement transducer 8, and the output terminal of displacement transducer 8 is connected through the input end of A/D converter 2 with control unit 1; The upper-position unit signal is as setting value, and its output terminal is connected through the input end of A/D converter 2 with control unit 1.
To the setting value of controlled parameter and the relation of valve element position, pneumatic actuator 6 has three actions according to upper-position unit, that is: down stroke, up stroke and static.Its concrete working procedure is described below:
Down stroke: receiving module 9 moves feedback signal by the valve position that A/D converter 2 receives valve body 7 spools, and the valve position value that comparison module 10 moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved the valve position value that feedback signal is set less than upper-position unit, control module 11 transmits control signal by the control end of D/A converter 3 to first high-speed switch valve 4 and second high-speed switch valve 5, first high-speed switch valve is in closed condition 4 this moments, and second high-speed switch valve 5 receives control signal and is in opening state; Gas enters pneumatic actuator 6 through second high-speed switch valve 5, along with the increase that enters gas flow, pneumatic actuator 6 internal gas pressure increase, thereby make the tension force of the pressure of pneumatic actuator 6 diaphragm upper surfaces greater than following spring, diaphragm moves downward, and moves downward thereby drive spool; Move the valve position value that feedback signal and upper-position unit set up to the valve position of valve body 7 spools and equate, and air pressure balances each other to the active force of diaphragm and the tension force of following spring, second high-speed switch valve 5 is closed, and gas no longer enters, and spool rests on desired location.
Up stroke: receiving module 9 moves feedback signal by the valve position that A/D converter 2 receives valve body 7 spools, and the valve position value that comparison module 10 moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved the valve position value that feedback signal is set greater than upper-position unit, control module 11 transmits control signal by the control end of D/A converter 3 to first high-speed switch valve 4 and second high-speed switch valve 5, second high-speed switch valve is in closed condition 5 this moments, and first high-speed switch valve 4 receives control signal and is in opening state; Gas flows out pneumatic actuator 6 through first high-speed switch valve 4, along with the increase of the effluent gases scale of construction, pneumatic actuator 6 internal gas pressure reduce, thereby make the tension force of the pressure of pneumatic actuator 6 diaphragm upper surfaces less than following spring, diaphragm moves upward, and moves upward thereby drive spool; Move the valve position value that feedback signal and upper-position unit set up to the valve position of valve body 7 spools and equate, and air pressure balances each other to the active force of diaphragm and the tension force of following spring, first high-speed switch valve 4 is closed, and gas no longer flows out, and spool rests on desired location.
Static: receiving module 9 moves feedback signal by the valve position that A/D converter 2 receives valve body 7 spools, and the valve position value that comparison module 10 moves feedback signal and upper-position unit setting with the valve position that receives compares; Valve position is moved feedback signal and is equaled the valve position value that upper-position unit is set, control module 11 transmits control signal by the control end of D/A converter 3 to first high-speed switch valve 4 and second high-speed switch valve 5, first high-speed switch valve 4 and second high-speed switch valve 5 all are in closed condition, gas does not enter yet and does not flow out, and spool rests on initial position.
Control unit 1 adopts single-chip microcomputer or programmable controller, just can implement intelligent control to pneumatic control valve as long as we write a good self learning system.
Claims (2)
1. an intelligent pneumatic power modulating valve comprises control unit (1), A/D converter (2), D/A converter (3), first high-speed switch valve (4), second high-speed switch valve (5), pneumatic actuator (6), valve body (7), displacement transducer (8); Wherein control unit (1) comprises receiving module (9), comparison module (10), control module (11), it is characterized in that the output terminal of control unit (1) is connected with the control end of first high-speed switch valve (4) with second high-speed switch valve (5) respectively by D/A converter (3); The suction port of second high-speed switch valve (5) is communicated with the constant voltage source of the gas, the relief opening of second high-speed switch valve (5) links to each other with the suction port of pneumatic actuator (6) and the suction port of first high-speed switch valve (4) respectively, and the relief opening of first high-speed switch valve (4) is communicated with atmosphere; The suction port of pneumatic actuator (6) links to each other with the suction port of first high-speed switch valve (4), and the rigid disc below pneumatic actuator (6) diaphragm links to each other by the spool of connecting rod with valve body (7); Spool in the valve body (7) links to each other with the input end of displacement transducer (8), and the output terminal of displacement transducer (8) is connected through the input end of A/D converter (2) with control unit (1); The upper-position unit output terminal is connected with the input end of control unit (1) by A/D converter (2).
2. intelligent pneumatic power modulating valve according to claim 1 is characterized in that described first high-speed switch valve (4) and second high-speed switch valve (5) all adopt the 2/2-way high-speed switch valve; Pneumatic actuator (6) adopts many springs pneumatic diaphragn actuating mechanism; Control unit (1) adopts single-chip microcomputer or programmable controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920072625U CN201386710Y (en) | 2009-05-21 | 2009-05-21 | Intelligent pneumatic adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920072625U CN201386710Y (en) | 2009-05-21 | 2009-05-21 | Intelligent pneumatic adjusting valve |
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| Publication Number | Publication Date |
|---|---|
| CN201386710Y true CN201386710Y (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920072625U Expired - Fee Related CN201386710Y (en) | 2009-05-21 | 2009-05-21 | Intelligent pneumatic adjusting valve |
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| CN (1) | CN201386710Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322540A (en) * | 2011-08-24 | 2012-01-18 | 浙江远安流体设备有限公司 | Intelligent spherical reverse valve |
| CN103736364A (en) * | 2014-01-24 | 2014-04-23 | 天津市振津工程设计咨询有限公司 | Boost-buck system based on opening control of switch valve in molecular sieve drying |
| CN110316410A (en) * | 2019-08-09 | 2019-10-11 | 武汉斯蒂尔派科技有限公司 | It is a kind of for adjusting the device and maintenance unit of baler banding tightening force |
-
2009
- 2009-05-21 CN CN200920072625U patent/CN201386710Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322540A (en) * | 2011-08-24 | 2012-01-18 | 浙江远安流体设备有限公司 | Intelligent spherical reverse valve |
| CN103736364A (en) * | 2014-01-24 | 2014-04-23 | 天津市振津工程设计咨询有限公司 | Boost-buck system based on opening control of switch valve in molecular sieve drying |
| CN103736364B (en) * | 2014-01-24 | 2016-06-22 | 天津市振津石油天然气工程有限公司 | Based on to the buck system that in molecular sieve drying, switch valve is carried out aperture control |
| CN110316410A (en) * | 2019-08-09 | 2019-10-11 | 武汉斯蒂尔派科技有限公司 | It is a kind of for adjusting the device and maintenance unit of baler banding tightening force |
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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: 20100120 Termination date: 20100521 |