CN201007798Y - Electronic type electric controlled valve positioner - Google Patents
Electronic type electric controlled valve positioner Download PDFInfo
- Publication number
- CN201007798Y CN201007798Y CNU2007200188001U CN200720018800U CN201007798Y CN 201007798 Y CN201007798 Y CN 201007798Y CN U2007200188001 U CNU2007200188001 U CN U2007200188001U CN 200720018800 U CN200720018800 U CN 200720018800U CN 201007798 Y CN201007798 Y CN 201007798Y
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- valve
- comparer
- output terminal
- dead band
- solenoid valve
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- Expired - Fee Related
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Abstract
The utility model relates to an electronic electric valve positioner which comprises a valve position sensor, a control circuit and a magnetic valve of which the opening or the closing are controlled by the control circuit, the magnetic valve is a magnetic valve with a big orifice, and the magnetic valve comprises a valve opening electromagnetic valve and a valve exhaust electromagnetic valve. The control circuit comprises an analog-to-digital converter, a standard signal comparator, a high dead zone comparator, a low dead zone comparator, a valve opening driving amplifier and a valve exhaust driving amplifier, the valve opening electromagnetic valve is in series connected in an air intake pipe line which is arranged between a communicated gas source and a valve, and the valve exhaust electromagnetic valve is in series connected in an air outtake pipe line of the valve. The electronic electric valve positioner needs no a pressure reducing valve and a pneumatic amplifier, and has the advantages of simple structure, small volume, high vibration resistance, low power consumption, big orifices of the valve opening electromagnetic valve and the valve exhaust electromagnetic valve, low requirement for the gas source, high precision, low drift, perfect stability and long service life.
Description
Technical field
The utility model relates to a kind of control device of valve, a kind of electronic type electropneumatic valve positioner of more specifically saying so.
Background technology
Traditional electropneumatic valve positioner, be that pulling force acting in conjunction by the suction of electromagnet and valve feedback spring is on the baffle plate of nozzle baffle mechanism, utilize the back pressure that produces on the nozzle control signal as pneumatic amplifier, remove to drive the air pressure of pneumatic actuator by the output of pneumatic amplifier, because the suction of electromagnet and the pulling force of valve feedback spring all can produce drift, so the precision of traditional electropneumatic valve positioner is low, poor stability, antivibration ability are low.In order to solve the existing drawback of conventional electrical valve positioner, released intelligent valve positioner on the market, it is by predefined program, by microprocessor control signal and valve feedback signal are compared, result is relatively removed to control miniature electromagnetic valve or piezo electric valve by output signal, control pneumatic amplifier by miniature electromagnetic valve or piezo electric valve, control source of the gas by pneumatic amplifier, the major advantage of this intelligent valve positioner is the precision height, good stability, it is little to drift about, but it has complex structure, can not be used for the Control work power supply and need 24VDC, the universaling electromagnetic valve of the big latus rectum of 100mA-200mA.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, can be directly with the electronic type electropneumatic valve positioner of the solenoid control source of the gas output of big latus rectum.
In order to realize above-mentioned purpose, the electronic type electropneumatic valve positioner that is provided, comprise valve position sensor, control circuit and open or electromagnetic valve closed by control circuit, its design feature is that solenoid valve is the solenoid valve of big latus rectum, solenoid valve comprises valve opening solenoid valve and valve exhaust solenoid valve, control circuit comprises analog to digital converter, the standard signal comparer, high dead band comparer, low dead band comparer, valve opening driving amplifier and valve exhaust gas drive amplifier, valve position sensor is connected on the input end of analog to digital converter, the output terminal of analog to digital converter is connected with the in-phase input end of standard signal comparer, the inverting input of standard signal comparer is connected with the output terminal of regulator, the output terminal of standard signal comparer has two-way output, road output wherein is connected with the in-phase input end of high dead band comparer, another road output is connected with the inverting input that hangs down the dead band comparer, be connected to the valve opening driving amplifier on the output terminal of high dead band comparer, be connected to the valve opening solenoid valve on the output terminal of this valve opening driving amplifier, the valve opening solenoid valve is connected in the air inlet pipeline that is communicated with between source of the gas and the valve, be connected to valve exhaust gas drive amplifier on the output terminal of low dead band comparer, be connected to the valve exhaust solenoid valve on the output terminal of this valve exhaust gas drive amplifier, the valve exhaust solenoid valve is connected in the gas exhaust piping of valve.
Above-mentioned valve position sensor comprises an accurate adjustable resistance, is connected to connecting rod on the travelling arm of this precision adjustable resistance, and this connecting rod is connected with the valve handle activity of valve.
In order to expand the function of control circuit, also be connected to voltage current transducer at the output terminal of analog to digital converter.
In order to reduce the specifications and models of components and parts in the control circuit, be convenient to buying and installation, above-mentioned analog to digital converter is a comparer, the travelling arm of accurate adjustable resistance is connected with the input end in the same way of this comparer.
Electronic type electropneumatic valve positioner provided by the utility model, the variation of the stem position of valve drives accurate adjustable resistance by connecting rod travelling arm slides on accurate adjustable resistance, change the resistance that is connected on the analog to digital converter input end, the current potential of this input end is changed, export the voltage of 2V-10V by the output terminal of analog to digital converter, this voltage is added to the in-phase input end of standard signal comparer, become the voltage of 2V-10V through the resistance of one 500 Ω by the standard signal of the 4mA-20mA of regulator output, join the inverting input of standard signal comparer, the difference of these two voltages is after the standard signal comparer amplifies, be input to the in-phase input end of high dead band comparer and the inverting input of low dead band comparer, respectively with the high dead band comparer inverting input of setting on high dead band voltage and the low dead band voltage on the comparer in-phase input end of low dead band compare: 1, difference voltage after amplifying is during greater than high dead band voltage, high dead band comparer output HIGH voltage, connect the valve opening driving amplifier, the valve opening solenoid valve must be established by cable and open, make the stem position positive dirction displacement of valve, the travelling arm positive dirction of accurate adjustable resistance is slided, reduce the current potential on the analog to digital converter input end, thereby reduce the output voltage of analog to digital converter, and then by the standard signal comparer, high dead band comparer and valve opening driving amplifier are stabilized in corresponding to the dead zone location place valve rod, at this moment, low dead band comparer output LOW voltage, valve exhaust gas drive amplifier ends, the valve exhaust solenoid valve is closed; When 2, the difference voltage after amplifying is less than low dead band voltage, high dead band comparer output LOW voltage, the valve opening driving amplifier ends, valve opening solenoid valve dead electricity is closed, low dead band comparer output HIGH voltage, the conducting of valve exhaust gas drive amplifier, the valve exhaust solenoid valve must conduct, gas in the valve of control stem position is discharged, make valve rod be stabilized in the dead zone location place.
Electronic type electropneumatic valve positioner provided by the utility model, its beneficial effect is: 1, do not need reduction valve and pneumatic amplifier, simple in structure, volume is little, is the 1/3-1/2 of conventional electrical valve positioner volume; 2, inelastic component, vibration resistance is strong; 3, do not consume gas, low in energy consumption, normal power consumption is less than 24V * 10mA; 4, the latus rectum of valve opening solenoid valve and valve exhaust solenoid valve is big, and is low to the source of the gas requirement, do not need voltage stabilizing; 5, precision height, it is little to drift about, good stability, long service life does not need the debugging maintenance for many years after the installation; 6, more be applicable to remote valve, when source of the gas broke down, the position of valve rod was in hold mode.
Description of drawings
Embodiment of the present utility model is illustrated in conjunction with the accompanying drawings, wherein:
Fig. 1 is the described electronic type electropneumatic valve positioner of an embodiment circuit structure schematic diagram;
Fig. 2 is the scheme of installation of valve position sensor on electronic type electropneumatic valve positioner housing.
Among the figure: 1 is housing, and 2 is connecting rod, and 3 is accurate adjustable resistance, 4 is the valve opening solenoid valve, 5 is the valve exhaust solenoid valve, and 6 is circuit board, and 7 is the cable outlet mouth, 8 is valve rod, 9 is valve, and 10 is air intake opening, and 11 is the gas outlet, 12 is air inlet pipeline, 13 is exhausr port, and 14 is gas exhaust piping, and IC1-1 is an analog to digital converter, IC1-2 and triode G5 constitute voltage current transducer, IC2-1 is the standard signal comparer, and IC3-1 is a high dead band comparer, and IC3-2 is low dead band comparer, IC1-1, IC1-2, IC2-1, the unified LM358 operational amplifier of selecting for use of IC3-1 and IC3-2, IC1-1 wherein, the shared operational amplifier of IC1-2, the shared operational amplifier of IC3-1 and IC3-2, IC4 is a three terminal integrated voltage stabilizer, triode G1 and G2 constitute the valve opening driving amplifier, triode G3 and G4 constitute valve exhaust gas drive amplifier, and A is+the 24V power input that B is the standard signal input end by the 4mA-20mA of regulator output, C is an earth terminal, and D is the output terminal of voltage current transducer.
Embodiment
With reference to accompanying drawing, the described electronic type electropneumatic valve positioner of embodiment, comprise valve position sensor, control circuit and open or electromagnetic valve closed by control circuit, valve position sensor comprises an accurate adjustable resistance 3, be connected to connecting rod 2 on the travelling arm of this precision adjustable resistance 3, this connecting rod 2 flexibly connects with the valve rod 8 of valve 9, solenoid valve is the solenoid valve of big latus rectum, solenoid valve comprises valve opening solenoid valve 4 and valve exhaust solenoid valve 5, control circuit comprises analog to digital converter IC1-1, standard signal comparer IC2-1, high dead band comparer IC3-1, low dead band comparer IC3-2, valve opening driving amplifier G1 and G2, valve exhaust gas drive amplifier G3 and G4, analog to digital converter IC1-1 is a comparer, the travelling arm of accurate adjustable resistance 3 is connected with the input end in the same way of this comparer, the output terminal of analog to digital converter IC1-1 is connected with the in-phase input end of standard signal comparer IC2-1, the inverting input of standard signal comparer IC2-1 is connected with the output terminal of regulator, the output terminal of standard signal comparer IC2-1 has two-way output, road output wherein is connected with the in-phase input end of high dead band comparer IC3-1, another road output is connected with the inverting input that hangs down dead band comparer IC3-2, be connected to valve opening driving amplifier G1 and G2 on the output terminal of high dead band comparer IC3-1, be connected to valve opening solenoid valve 4 on the output terminal of this valve opening driving amplifier G1 and G2, valve opening solenoid valve 4 is connected in the air inlet pipeline 12 that is communicated with between source of the gas and the valve, be connected to valve exhaust gas drive amplifier G3 and G4 on the output terminal of low dead band comparer IC3-2, be connected to valve exhaust solenoid valve 5 on the output terminal of this valve exhaust gas drive amplifier G3 and G4, valve exhaust solenoid valve 5 is connected in the gas exhaust piping 14 of valve.
In order to expand the function of control circuit, also be connected to voltage current transducer IC1-2 and G5 at the output terminal of analog to digital converter IC1-1.
In the present embodiment, control circuit is assembled on the circuit board 6, accurate adjustable resistance 3, valve opening solenoid valve 4, valve exhaust solenoid valve 5, circuit board 6 is fixed in housing 1 front, and air intake opening 10, exhausr port 11 are fixed in housing 1 side, and cable outlet mouth 7 is fixed in housing 1 bottom surface, exhausr port 13 is fixed in housing 1 back side, and the travelling arm of accurate adjustable resistance 3 is connected with connecting rod 2 at the back side of housing 1.
Claims (4)
1. electronic type electropneumatic valve positioner, comprise valve position sensor, control circuit and open or electromagnetic valve closed by control circuit, it is characterized in that solenoid valve is the solenoid valve of big latus rectum, solenoid valve comprises valve opening solenoid valve (4) and valve exhaust solenoid valve (5), control circuit comprises analog to digital converter (IC1-1), standard signal comparer (IC2-1), high dead band comparer (IC3-1), low dead band comparer (IC3-2), valve opening driving amplifier (G1 and G2), valve exhaust gas drive amplifier (G3 and G4), valve position sensor is connected on the input end of analog to digital converter (IC1-1), the output terminal of analog to digital converter (IC1-1) is connected with the in-phase input end of standard signal comparer (IC2-1), the inverting input of standard signal comparer (IC2-1) is connected with the output terminal of regulator, the output terminal of standard signal comparer (IC2-1) has two-way output, road output wherein is connected with the in-phase input end of high dead band comparer (IC3-1), another road output is connected with the inverting input that hangs down dead band comparer (IC3-2), be connected to valve opening driving amplifier (G1 and G2) on the output terminal of high dead band comparer (IC3-1), be connected to valve opening solenoid valve (4) on the output terminal of this valve opening driving amplifier (G1 and G2), valve opening solenoid valve (4) is connected in the air inlet pipeline (12) that is communicated with between source of the gas and the valve, be connected to valve exhaust gas drive amplifier (G3 and G4) on the output terminal of low dead band comparer (IC3-2), be connected to valve exhaust solenoid valve (5) on the output terminal of this valve exhaust gas drive amplifier (G3 and G4), valve exhaust solenoid valve (5) is connected in the gas exhaust piping (14) of valve.
2. electronic type electropneumatic valve positioner according to claim 1, it is characterized in that valve position sensor comprises an accurate adjustable resistance (3), be connected to connecting rod (2) on the travelling arm of this precision adjustable resistance (3), this connecting rod (2) flexibly connects with the valve rod (8) of valve (9).
3. electronic type electropneumatic valve positioner according to claim 1 is characterized in that also being connected to voltage current transducer (IC1-2 and G5) at the output terminal of analog to digital converter (IC1-1).
4. according to claim 1 or 3 described electronic type electropneumatic valve positioners, it is characterized in that analog to digital converter (IC1-1) is a comparer, the travelling arm of accurate adjustable resistance (3) is connected with the input end in the same way of this comparer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200188001U CN201007798Y (en) | 2007-02-15 | 2007-02-15 | Electronic type electric controlled valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200188001U CN201007798Y (en) | 2007-02-15 | 2007-02-15 | Electronic type electric controlled valve positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201007798Y true CN201007798Y (en) | 2008-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200188001U Expired - Fee Related CN201007798Y (en) | 2007-02-15 | 2007-02-15 | Electronic type electric controlled valve positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201007798Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563190A (en) * | 2012-02-03 | 2012-07-11 | 深圳乐满油气技术有限公司 | Pneumatic positioning actuator with intermittent gas supply |
| CN102734509A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Pneumatic amplifier |
| CN102734542A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Pilot relay |
| CN103047465A (en) * | 2011-10-14 | 2013-04-17 | 阿自倍尔株式会社 | Locator |
| CN103321727A (en) * | 2012-03-21 | 2013-09-25 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
-
2007
- 2007-02-15 CN CNU2007200188001U patent/CN201007798Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734509A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Pneumatic amplifier |
| CN102734542A (en) * | 2011-03-30 | 2012-10-17 | 阿自倍尔株式会社 | Pilot relay |
| CN102734542B (en) * | 2011-03-30 | 2014-10-08 | 阿自倍尔株式会社 | Pilot relay |
| CN102734509B (en) * | 2011-03-30 | 2014-11-26 | 阿自倍尔株式会社 | Pneumatic amplifier |
| CN103047465A (en) * | 2011-10-14 | 2013-04-17 | 阿自倍尔株式会社 | Locator |
| CN103047465B (en) * | 2011-10-14 | 2014-08-13 | 阿自倍尔株式会社 | Positioner |
| CN102563190A (en) * | 2012-02-03 | 2012-07-11 | 深圳乐满油气技术有限公司 | Pneumatic positioning actuator with intermittent gas supply |
| CN103321727A (en) * | 2012-03-21 | 2013-09-25 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
| CN103321727B (en) * | 2012-03-21 | 2015-07-22 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
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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: 20080116 Termination date: 20130215 |