CN106763977B - A kind of anti-tampering intelligent valve positioner - Google Patents
A kind of anti-tampering intelligent valve positioner Download PDFInfo
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- CN106763977B CN106763977B CN201611089721.XA CN201611089721A CN106763977B CN 106763977 B CN106763977 B CN 106763977B CN 201611089721 A CN201611089721 A CN 201611089721A CN 106763977 B CN106763977 B CN 106763977B
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- valve positioner
- intelligent valve
- circuit
- tampering
- pneumatic amplifier
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Classifications
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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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
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention discloses a kind of anti-tampering intelligent valve positioners, including：Electropneumatic transducer；Circuit controling assembly；Displacement detecting feedback unit；Electropneumatic transducer includes pneumatic amplifier, the nozzle in the back pressure mouth of pneumatic amplifier is arranged, the baffle that is closed with nozzle cover and the electromagnetic drive mechanism for driving baffle and the right size of nozzle cover, electromagnetic drive mechanism are controlled by the current controling signal that circuit controling assembly is sent out；The air inlet of pneumatic amplifier is provided with miniature decompression valuator, and miniature decompression valuator includes permanent throttling screw and is sleeved on the permanent relief spring and sealing ring to throttle on screw, and perseverance throttling screw coordinates with the constant throttling orifice that pneumatic amplifier is equipped with.The anti-tampering intelligent valve positioner of the present invention, have the characteristics that anti-air source fluctuation interference, anti-vibration interference, anti-electromagnetic interference, it can effectively ensure that reliability and position stability of the locator under complex jamming operating mode, it is stable and reliable for performance, be conducive to market-oriented popularization.
Description
Technical field
The present invention relates to pneumatic valve adjusting device fields, and in particular to a kind of anti-tampering intelligent valve positioner.
Background technology
Locator is the important control attachment of regulating valve, and intelligent valve positioner includes mainly signal processing unit and valve
Door position feedback unit (hereinafter referred to as valve position feedback unit) two parts.The external positioning signal of signal processing unit reception (such as 4~
20mA current signals, HART digital signals etc.), and the valve current location sampled signal provided according to valve position feedback unit, meter
Output driving electric signal is calculated, corresponding pneumatic signal, driving regulating valve movement, regulating valve position are converted by I/P converting units
The variation set and perceived by valve position feedback unit, acquire valve position signal in real time by system and feed back to signal processing unit into
Row processing.
At present both at home and abroad mainly using Siemens, Shan Wudeng companies product as representative, one is based on non-for these locators
The piezoelectricity valve technology of the piezoelectricity back wash effect material of symmetric construction crystal, one is the air-blast atomizer based on electromagnetic technique/baffle skills
Art.The former is limited by piezo technology mostly uses greatly the piezoelectricity from Germany He Erbige (hoerbiger) automation technology corporation
Valve, cost etc. are unable to control, and piezo electric valve requires height to be easily damaged air source and can not repair.So competing in order to reduce cost
Power is striven, the locator of completely new reliable nozzle flapper technical principle is designed, which is all independently to grind entirely substantially
Hair, that does is reliably extremely not easy.The present invention is exactly nozzle flapper technical intelligence type locator, is especially had at anti-interference aspect all
More reliability designs have certain advantage compared to conventional spout baffle positioning utensil.
Locator is mostly used the industry-by-industries such as chemical industry, coal, oil, and onsite application environment is complicated, there is interference sources,
Such as electromagnetic interference, air source erratic fluctuations are interfered, vibration interference, and the unstable input of input current is excessive etc., it is fixed to influence whether
The using effect and reliability of position device, it is serious locator to be caused to damage.
The Chinese invention patent application that application publication number is CN103727283A (application No. is 201310653132.X) is public
A kind of valve positioner is opened, including shell, the valve shaft lever that is rotatably dispose in the shell, the lower end of the valve shaft lever
The bottom of the shell is run through in portion, and the upper end of the valve shaft lever is connected with the Pneumatic assembly for driving its rotation and detection
The stroke detection sensor of its rotational angle offers air pressure input port and air pressure outlet, institute on the shell respectively
Master control borad, electropneumatic transducer and pressure sensor are provided in the shell stated, the master control borad is equipped with governor circuit, institute
The air pressure input port described in electropneumatic transducer connection stated, the Pneumatic assembly connection air pressure outlet, the pressure
Force snesor is connected with the Pneumatic assembly and the master control borad respectively, the electropneumatic transducer respectively with it is described
Master control borad and the Pneumatic assembly be connected, the stroke detection sensor is connected with the master control borad, institute
The shell stated is wrapped with stainless steel layer.The stainless steel layer improves the case hardness of the intelligent valve positioner, plays protection
Effect, while electromagnetic interference of the environment to internal component can be reduced, there is higher capability of fast response and control accuracy.
Invention content
The present invention provides a kind of anti-tampering intelligent valve positioners, there is anti-air source fluctuation interference, anti-vibration to interfere,
The features such as anti-electromagnetic interference, can effectively ensure that reliability and position stability of the locator under complex jamming operating mode.
A kind of anti-tampering intelligent valve positioner, including：
Electropneumatic transducer, the gas circuit end of the electropneumatic transducer with valve actuator for connecting；
The circuit controling assembly being connect with the circuit end of the electropneumatic transducer；
The displacement detecting feedback unit being connect with the circuit controling assembly；
The electropneumatic transducer includes pneumatic amplifier, be arranged the back pressure mouth of the pneumatic amplifier nozzle (i.e.
The gas circuit control signal of pneumatic amplifier), the baffle that closes with the nozzle cover and the driving baffle and nozzle cover it is right
The electromagnetic drive mechanism of size, the electromagnetic drive mechanism are controlled by the current control letter that the circuit controling assembly is sent out
Number；
The air inlet of the pneumatic amplifier is provided with miniature decompression valuator, and the miniature decompression valuator includes
Perseverance throttling screw and the relief spring and sealing ring being sleeved on the permanent throttling screw, the permanent throttling screw and the gas
The constant throttling orifice cooperation that dynamic amplifier is equipped with.
In the present invention, the locator erratic shifts that miniature decompression valuator can effectively prevent air source wave zone are asked
Topic.The miniature decompression valuator is made of permanent throttling screw, relief spring, sealing ring with gas throttling buck functionality
Micro device, the characteristics of being integrated with pressure reducing valve and throttling pressure stabilizing device, and volume is very small, is not take up extra design space,
And back-out can be facilitated to replace, the dust particles in air source pollution compressed air can be convenient in the case of blocking at the scene
It replaces, improve maintenance efficiency and reduces maintenance cost.The case where air source is extremely unstable at the scene or even the damage of preposition pressure reducing valve
Lower relief spring can input air source in reasonable working pressure range with a degree of preposition pressure reducing protection locator, to protect
Card air source stablize it is pulsation-free be input in the gap of pneumatic actuator inner cylinders and nozzle flapper, it is fixed that locator may be implemented
Stablize without drift position.
It is used as the preferred technical solution of the present invention below：
The electromagnetic drive mechanism includes：Two groups of symmetrical electromagnet and setting are in two groups of symmetrical electromagnet
Intermediate dynamic iron, the dynamic iron are connect with the baffle.
The electromagnet includes coil and permanent magnet.
The gravity axis of the dynamic iron is equipped with fulcrum shaft, and the baffle is under the drive of the dynamic iron around the fulcrum shaft
Rotation, to control baffle and the right size of nozzle cover.The whole symmetrical structure using principle designs, especially fulcrum shaft with
Dynamic iron gravity axis is completely the same, does not generate turning moment plus vibration, therefore work under the conditions of high-frequency vibration, also can
Obtain stable output.
The displacement detecting feedback unit includes：The feedback rod being connect with valve, the feedback being connect with the feedback rod
Axis and displacement sensor in the resetting shaft side is set, the resetting shaft is equipped with driving gear, institute's displacement sensors
It is equipped with the driven gear coordinated with the driving gear so that displacement sensor obtains displacement signal.
Mechanical grip blank compensation apparatus, the mechanical grip blank compensation apparatus packet are installed on the resetting shaft
Include the circular base being set on the resetting shaft, the mounting hole being radially arranged along the circular base and the setting peace
Spring assembly in dress hole for being held out against to the resetting shaft.
The spring assembly include adjusting screw, with the steel ball of the bar portion screw-thread fit of the adjusting screw and be arranged
It is withstood on the steel ball in one end of the compressed spring of the bar portion of the adjusting screw, the compressed spring, the compression
The other end of spring is withstood on the circular base, and the steel ball is withstood on the resetting shaft.The initial compression force of spring
It can be adjusted by adjusting screw.
Further preferably, the spring assembly is three, is evenly distributed on the circular base at 120 degree.
In the displacement detecting feedback unit, there may be small under the operating mode of long-time frequent vibration for the device
Gap, 3 in blank compensation apparatus adjust gap at 120 degree of equally distributed counterbalance springs meeting autobalances at this time, and pass through
Steel ball haptic feedback axis, and the initial compression force of 3 counterbalance springs can be adjusted by adjusting screw.The device can be as possible
Reduce positioning accuracy error caused by locator gap error.
In the displacement detecting feedback unit, displacement sensor uses the resistance-type partial pressure sensor of good in anti-interference performance,
All have great advantage in terms of diamagnetic field interference and reliability compared to traditional magneto-dependent sensor.
The circuit controling assembly includes cpu control circuit plate and the LCD being connect with cpu control circuit plate display electricity
Road plate is equipped with electric current input protection circuit, power circuit, sample circuit, circuit driven by electromagnetic means in the cpu control circuit plate
Deng.
The diode of concatenated one-way conduction is anti-there are three being set in the positive terminal that the signal of the cpu control circuit plate inputs
Protection circuit is connect, the dual voltage-stabilizing protection electricity of two groups of zener diode parallel connections is equipped in the rear end of the cpu control circuit plate
Road.Multiple protective is done in input terminal, even if having one or two of protection diode damage to burn still can ensure in signal reversal connection
In the case of so that entire circuit is not turned on, to being protected to entire circuit.Rear end also has two groups of zener diodes in parallel
Dual protective circuit of voltage regulation, though in the case that input current be more than 40 times of maximum rated input current, the regulator circuit according to
The main control circuit of rear end can so stablized and stablizes the normal working voltage in 3.3V in 7.5V while sample circuit, significantly
Increase the reliability that product uses under electric current input abnormal conditions.The protection circuit is used in intrinsic safe explosion-proof circuit design,
The various electrical reliabilities experiment for having already been through national instrument and meter supervision and inspection on safety station (NEPSI) at present, meets this
Pacify requirement of explosion proof, certification of conformity of an instrument for explosive atmosphere number：GYB16.1817X.
The anti-tampering intelligent valve positioner further includes：Housing unit, the housing unit include upper cover and
Lower housing is sprayed with electromagnetic interference shield paint inside the upper cover and lower housing, and the electropneumatic transducer and circuit controling assembly are set
It sets in the housing unit, can effectively stop coil magnetic field and circuit of the electromagnetic interference in external environment to locator
The influence Deng caused by.The structure of the upper cover intermediate tie transparent window avoids foreign object from touching using the concave structure design sunk
It hits and transparent window is caused to damage.
Experiment is influenced by the external magnetic field in JB/T7368-1994 standards, is 50Hz in frequency, intensity is 400A/m's
Under external magnetic field, in the phase and direction of biggest impact, stroke variation does not surpass the intelligent valve positioner that the present invention provides
Cross the absolute value 0.5% of elementary error.
Compared with prior art, the invention has the advantages that：
The intelligent valve positioner that the present invention provides includes the electropneumatic transducer with miniature decompression valuator, anti-electromagnetism
The resistance-type displacement detecting feedback unit of interference, and the displacement detecting feedback unit carries mechanical grip blank compensation apparatus, it should
Device can compensate and buffer to the minim gap of generation under the operating mode of long-time frequent vibration, avoid sensor gap
Position inaccurate problem caused by error.The anti-tampering intelligent valve positioner of the present invention has the fluctuation interference of anti-air source, antivibration
The features such as dynamic interference, anti-electromagnetic interference, can effectively ensure that reliability of the locator under complex jamming operating mode and positioning are steady
It is qualitative.The anti-tampering intelligent valve positioner of the present invention is stable and reliable for performance, is conducive to market-oriented popularization.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of anti-tampering intelligent valve positioner of the invention；
Fig. 2 is the structural schematic diagram of electropneumatic transducer in the present invention；
Fig. 3 is the structural schematic diagram of pneumatic amplifier in the present invention；
Fig. 4 is the structural schematic diagram of mechanical grip blank compensation apparatus and displacement sensor in the present invention；
Fig. 5 is the circuit diagram of cpu control circuit plate electric current input protection in the present invention；
Wherein, 1 upper cover, 2 electromagnetic interference shield paints, 3 pneumatic amplifiers, 4 baffles, 5 transparent windows, 6 nozzles, 7LCD are shown
Circuit board, 8CPU control circuit boards, 9 plastic protection covers, 10 holders, 11 mechanical grip blank compensation apparatus, 12 displacement sensors,
13 resetting shafts, 14 feedback rods, 15 coils, 16 dynamic iron, 17 permanent magnets, 18 lower housings, 19 fulcrum shafts, 20 constant throttling orifice screws, 21
Sealing ring, 22 relief springs, 23 clamping screws, 24 driven gears, 25 driving gears, hexagonal adjusting screw in 26,27 compensation bullets
Spring, 28 steel balls.
Specific implementation mode
As shown in Figure 1, a kind of anti-tampering intelligent valve positioner, including：
Electropneumatic transducer, the gas circuit end of electropneumatic transducer with valve actuator for connecting；
The circuit controling assembly being connect with the circuit end of electropneumatic transducer；
The displacement detecting feedback unit being connect with circuit controling assembly；
Electropneumatic transducer includes pneumatic amplifier 3, is arranged in the nozzle 6 of the back pressure mouth of pneumatic amplifier 3, with nozzle 6 and covers
The baffle 4 and drive control baffle 4 of conjunction cover the electromagnetic drive mechanism of right size with nozzle 6, and electromagnetic drive mechanism is controlled by
The current controling signal that circuit controling assembly is sent out.
As shown in Figure 1, 2, 3, the air inlet of pneumatic amplifier 3 is provided with miniature decompression valuator, miniature decompression valuator
Including permanent throttling screw 20 and the relief spring 22 being sleeved on permanent throttling screw 20 and sealing ring 21, perseverance throttling screw 20 and gas
The constant throttling orifice cooperation that dynamic amplifier 3 is equipped with.
Electromagnetic drive mechanism includes：Two groups of symmetrical electromagnet and the dynamic iron being arranged among two groups of symmetrical electromagnet
16, which connect with baffle 4.Electromagnet includes coil 15 and permanent magnet 17.
The gravity axis of dynamic iron 16 is equipped with fulcrum shaft 19, and baffle 4 rotates under the drive of dynamic iron 16 around fulcrum shaft 19, to
Control baffle 4 covers right size with nozzle 6.The whole symmetrical structure using principle designs, especially fulcrum shaft 19 and dynamic iron
16 gravity axis are completely the same, do not generate turning moment plus vibration, therefore work under the conditions of high-frequency vibration, can also obtain
To stable output.
As Figure 1 and Figure 4, displacement detecting feedback unit includes：The feedback rod 14 and feedback rod being connect with valve rod
The resetting shafts 13 of 14 connections and displacement sensor 12 in 13 side of resetting shaft is set, resetting shaft 13 is equipped with driving gear 25,
Displacement sensor 12 is equipped with the driven gear 24 coordinated with driving gear 25 so that displacement sensor 12 obtains displacement signal.
Mechanical grip blank compensation apparatus 11 is installed, mechanical grip blank compensation apparatus 11 includes being arranged on resetting shaft 13
It is used for feedback in circular base on resetting shaft 13, the mounting hole being radially arranged along circular base and setting mounting hole
The spring assembly that axis 13 is held out against.
Spring assembly includes adjusting screw (hexagonal adjusting screw 26 in i.e.), the steel with the bar portion screw-thread fit of adjusting screw
Pearl 28 and be set in adjusting screw bar portion compressed spring (i.e. counterbalance spring 27), one end of compressed spring withstands on steel ball 28
On, the other end of compressed spring is withstood on circular base, and steel ball 28 is withstood on resetting shaft 13.The initial compression force of compressed spring can
To be adjusted by adjusting screw.Spring assembly is three, is evenly distributed on circular base at 120 degree.Clamping screw 23 is used for
Displacement sensor 12 is reliably fixed on lower housing 18.
Displacement sensor 12 using good in anti-interference performance resistance-type partial pressure sensor, compared to traditional magneto-dependent sensor from anti-
All have great advantage in terms of magnetic interference and reliability.
As shown in Figure 1, shown in Figure 5, circuit controling assembly includes cpu control circuit plate 8 and LCD display circuit plate 7, CPU controls
The circuit of 8 electric current of circuit board input protection, including the diode of one-way conduction is D18, D19, D20, resistance R58, two pole of voltage stabilizing
Pipe D5, D6, D13, D14, cpu control circuit plate 8 signal input positive terminal set there are three concatenated one-way conduction two
The diode of pole pipe reverse-connection protection circuit, three concatenated one-way conductions is D18, D19, D20, after cpu control circuit plate 8
Dual protective circuit of voltage regulation of the end equipped with two groups of zener diode parallel connection, in parallel two groups of zener diodes are D5, D6, D13,
D14, wherein A anodes, K are cathode.Multiple protective has been done in input terminal, has been appointed so even if there is one or two of protection diode damage to burn
It can ensure to make entire circuit be not turned in the case of signal reversal connection, to protect entire circuit.Rear end also has two
The dual protective circuit of voltage regulation of group zener diode parallel connection, even if being more than 40 times of situations of maximum rated input current in input current
Under, the regulator circuit can still make the main control circuit stabilization of rear end in 7.5V while sample circuit stabilization is 3.3V's
Normal working voltage considerably increases the reliability that product uses under electric current input abnormal conditions.
Anti-tampering intelligent valve positioner further includes：Housing unit, housing unit include upper cover 1 and lower housing 18, under
Holder 10 is fixed on shell 18, cpu control circuit plate 8 is installed over the mount 10, and cpu control circuit plate 8 is connected by copper stud
Fixed LCD display circuit plate 7 is connect, 1 centre of upper cover coordinates the structure of transparent window 5 recessed using what is sunk with LCD display circuit plate 7
Face structure design avoids foreign object collision that transparent window is caused to damage.LCD display circuit plate 7 is equipped with plastic protection cover 9.1 He of upper cover
Electromagnetic interference shield paint 2 is sprayed with inside lower housing 18, electropneumatic transducer and circuit controling assembly are arranged in the housing unit,
It can effectively stop the electromagnetic interference in external environment on influence caused by the coil magnetic field of locator and circuit etc..
The operation principle of the intelligent valve positioner of the present invention is as follows：
When use when inputting the increase of (4-20mA) current signal setting value by LCD display circuit plate 7, CPU is controlled at this time
Circuit board 8 processed receives increased duty setting signal and passes through in CPU calculation process output current to coil 15,15 magnetic field of coil
It changes, is swung for the dynamic iron 16 of fulcrum with fulcrum shaft 19.With this action, (lid conjunction is opened in the gap of baffle 4 and nozzle 6
Degree changes), the permanent throttling screw 20 and be sleeved on that air source passes through in the miniature decompression valuator of 3 air inlet of pneumatic amplifier
Stablize from nozzle after relief spring 22 and sealing ring 21 on perseverance throttling screw 20 and sprayed without fluctuation, back pressure declines in nozzle 6.This
When pneumatic amplifier 3 in spool move so that air source is entered by gas circuit in 3 inner air path of pneumatic amplifier and lower housing 18
Into pneumatic actuator, actuator air pressure inside increases, and valve movement is opened, and valve rod is with movement, valve rod and anti-
It presents bar 14 to connect, feedback rod 14 rotates certain angle, by the steel ball of resetting shaft 13 and mechanical grip blank compensation apparatus 11
28 and be set in adjusting screw bar portion compressed spring filtering buffering after uniformly it is pulsation-free be transmitted to displacement sensor 12,
Cpu control circuit plate 8 detects 12 signal value of sample shift sensor and the setting value of input is compared, at CPU operations
Reason is continuous to increase or reduces the size of current in coil 15, makes gap between 6 baffle 4 of nozzle, back pressure constantly regulate, control
Gas keeps setting value finally consistent with actual value into deflation, the reciprocal above process in actuator processed.
In the present invention, whether there is or not the intelligent valve positioner position stability test comparison data of miniature decompression valuator such as
Under：
One, drift experiment：
When input signal is the 50% of range, stroke value is recorded through 5min, 1h and 4h, calculates its stroke variation percentage number
According to.
As a result as follows, without the elegant amount 1.1% of miniature decompression valuator stroke, there is the miniature elegant amount of decompression valuator stroke
0.5%.
Two, bleed pressure variation influences experiment：
1. stablizing bleed pressure on rated value, input signal is range 50%, writes down stroke value；
2. changing bleed pressure ± 10kPa respectively, stroke value is write down again；It calculates.
As a result as follows, without miniature decompression valuator stroke variable quantity 0.8%, there is miniature decompression valuator stroke variable quantity
0.3%.
The present invention with other brand similar product vibration tests by comparing, and resistance to shock is good, and contrast test data are such as
Shown in table 1：
Table 1
| Intelligent valve positioner brand | Model | Resistance to shock |
| ABB | TZIDC | (80Hz/10g)≤± 1%FS |
| Wan Xun | MVP3300 | (15-150Hz/2g)≤± 0.5%FS |
| YTC | YT-3300 | (100Hz/6g)≤± 0.5%FS |
| (locator of the present invention) | IP4000 | (maximum 400Hz and 10g)≤0.5%FS |
The intelligent valve positioner that the present invention provides includes the electropneumatic transducer with miniature decompression valuator, anti-electromagnetism
The resistance-type displacement detecting feedback unit of interference, and the displacement detecting feedback unit carries mechanical grip blank compensation apparatus, it should
Device can compensate and buffer to the minim gap of generation under the operating mode of long-time frequent vibration, avoid sensor gap
Position inaccurate problem caused by error.The anti-tampering intelligent valve positioner of the present invention has the fluctuation interference of anti-air source, antivibration
The features such as dynamic interference, anti-electromagnetic interference, can effectively ensure that reliability of the locator under complex jamming operating mode and positioning are steady
It is qualitative.
Claims (10)
1. a kind of anti-tampering intelligent valve positioner, including：
Electropneumatic transducer, the gas circuit end of the electropneumatic transducer with valve actuator for connecting；
The circuit controling assembly being connect with the circuit end of the electropneumatic transducer；
The displacement detecting feedback unit being connect with the circuit controling assembly；
The electropneumatic transducer includes pneumatic amplifier, be arranged the back pressure mouth of the pneumatic amplifier nozzle, with it is described
The electromagnetic drive mechanism of baffle and the driving baffle and the right size of nozzle cover that nozzle cover closes, the electromagnetic drive machine
Structure is controlled by the current controling signal that the circuit controling assembly is sent out；
It is characterized in that, the air inlet of the pneumatic amplifier is provided with miniature decompression valuator, the miniature decompression is fixed
Value device includes permanent throttling screw and the relief spring and sealing ring that are sleeved on the permanent throttling screw, the permanent throttling screw
Coordinate with the constant throttling orifice that the pneumatic amplifier is equipped with.
2. anti-tampering intelligent valve positioner according to claim 1, which is characterized in that the electromagnetic drive mechanism
Including：Two groups of symmetrical electromagnet and the dynamic iron being arranged among two groups of symmetrical electromagnet, the dynamic iron and the gear
Plate connects.
3. anti-tampering intelligent valve positioner according to claim 2, which is characterized in that the gravity axis of the dynamic iron
It is equipped with fulcrum shaft, the baffle rotates under the drive of the dynamic iron around the fulcrum shaft.
4. anti-tampering intelligent valve positioner according to claim 1, which is characterized in that the displacement detecting feedback
Unit includes：The feedback rod that is connect with valve, the resetting shaft being connect with the feedback rod and it is arranged in the resetting shaft side
Displacement sensor, the resetting shaft is equipped with driving gear, and institute's displacement sensors, which are equipped with, to be coordinated with the driving gear
Driven gear.
5. anti-tampering intelligent valve positioner according to claim 4, which is characterized in that installed on the resetting shaft
It includes the annular being set on the resetting shaft to have mechanical clamping gap compensation device, the mechanical grip blank compensation apparatus
For being held out against to the resetting shaft in pedestal, the mounting hole being radially arranged along the circular base and the setting mounting hole
Spring assembly.
6. anti-tampering intelligent valve positioner according to claim 5, which is characterized in that the spring assembly includes
Adjusting screw, the compression with the steel ball of the bar portion screw-thread fit of the adjusting screw and the bar portion for being set in the adjusting screw
One end of spring, the compressed spring is withstood on the steel ball, and the other end of the compressed spring withstands on the annular base
On seat, the steel ball is withstood on the resetting shaft.
7. anti-tampering intelligent valve positioner according to claim 6, which is characterized in that the spring assembly is three
It is a, it is evenly distributed on the circular base at 120 degree.
8. anti-tampering intelligent valve positioner according to claim 1, which is characterized in that institute's displacement sensors use
Resistance-type partial pressure sensor.
9. anti-tampering intelligent valve positioner according to claim 1, which is characterized in that the circuit controling assembly packet
The LCD display circuit plate for including cpu control circuit plate and being connect with the cpu control circuit plate；
The reversal of diode of concatenated one-way conduction is protected there are three being set in the positive terminal that the signal of the cpu control circuit plate inputs
Protection circuit is equipped with the dual protective circuit of voltage regulation of two groups of zener diode parallel connections in the rear end of the cpu control circuit plate.
10. anti-tampering intelligent valve positioner according to claim 1, which is characterized in that the anti-tampering intelligence
Can valve positioner, further include：Housing unit, the housing unit include upper cover and lower housing, the upper cover and lower housing
Inside is sprayed with electromagnetic interference shield paint, and the electropneumatic transducer and circuit controling assembly are arranged in the housing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611089721.XA CN106763977B (en) | 2016-12-01 | 2016-12-01 | A kind of anti-tampering intelligent valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611089721.XA CN106763977B (en) | 2016-12-01 | 2016-12-01 | A kind of anti-tampering intelligent valve positioner |
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| Publication Number | Publication Date |
|---|---|
| CN106763977A CN106763977A (en) | 2017-05-31 |
| CN106763977B true CN106763977B (en) | 2018-09-11 |
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| CN201611089721.XA Active CN106763977B (en) | 2016-12-01 | 2016-12-01 | A kind of anti-tampering intelligent valve positioner |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006307B (en) * | 2017-12-29 | 2019-08-20 | 武汉拓优智能股份有限公司 | The pneumatic positioner valve of intrinsic safety chamber and flame proof separation |
| IT201800006825A1 (en) * | 2018-06-29 | 2019-12-29 | ACTUATOR EQUIPPED WITH AN ELECTROMAGNETIC FIELD SHIELDING DEVICE FOR MAGNETIC OR MAGNETO-RESISTIVE POSITION SENSORS. | |
| CN109826997B (en) * | 2019-03-26 | 2023-09-22 | 无锡凯尔克仪表阀门有限公司 | Throttling structure for nozzle baffle type positioner |
| CN113790304B (en) * | 2021-08-23 | 2023-11-14 | 浙江中控技术股份有限公司 | Intrinsic safety HART communication system for intelligent valve positioner |
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| US6999853B2 (en) * | 2002-05-03 | 2006-02-14 | Fisher Controls International Llc. | Methods and apparatus for operating and performing diagnostics in a control loop of a control valve |
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| CN2547983Y (en) * | 2002-06-13 | 2003-04-30 | 吴忠仪表股份有限公司 | New-type electric valve locator |
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| CN106763977A (en) | 2017-05-31 |
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