CN202629254U - Intelligent electric valve locating device - Google Patents
Intelligent electric valve locating device Download PDFInfo
- Publication number
- CN202629254U CN202629254U CN 201220259549 CN201220259549U CN202629254U CN 202629254 U CN202629254 U CN 202629254U CN 201220259549 CN201220259549 CN 201220259549 CN 201220259549 U CN201220259549 U CN 201220259549U CN 202629254 U CN202629254 U CN 202629254U
- Authority
- CN
- China
- Prior art keywords
- master control
- valve
- control borad
- valve rod
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fluid-Driven Valves (AREA)
- Servomotors (AREA)
Abstract
The utility model relates to an intelligent electric valve locating device which can achieve an accurate location function and moves according to control commands so as to respond to the commands as soon as possible and reduces leakage. The device comprises a main control board, wherein the main control board is connected with a junction box which is connected with an upper computer through an on-site bus. A pneumatic assembly is connected with a gas source through an electricity or gas convertor which is connected with the main control board. The pneumatic assembly is connected with a valve rod of the valve to drive the valve rod to carry out connection or disconnection motions. A travel switch is arranged on the valve rod, and the travel switch is connected with the main control board. Meanwhile, the main control board is connected with a pressure sensor which is arranged on a pipeline of the pneumatic assembly.
Description
Technical field
The utility model relates to a kind of intelligent electric valve positioner.
Background technique
Process control is widely used in departments such as oil, chemical industry, electric power, metallurgy; And process control system often is made up of one-tenth hundred even thousands of control loops; Each control loop all can be accepted or produce internally to disturb, and process variables is produced decisive influence.Also can the exert an influence disturbance of process variables of interaction between difference is gone the same way.The information of various sensors and transmitter collection process variable, controller is accepted these information and is handled, and makes process variables after load disturbance takes place, return to its normal range (NR).After all measurements, comparison, evaluation work are accomplished, must come the selected control strategy of implementation controller by final controlling element.The most frequently used final controlling element is exactly a control valve in the control loop.Control valve is regulated flowing fluid, like gas, steam, water or chemical mixture, with the compensating load disturbance and make the set point that controlled process variables is positioned as close to be needed.
But existing valve, often can not accurately be located and move when used valve quantity is very big owing to lack the location and intelligence, causes amount of leakage excessive, brings very big hidden danger to production safety.
The model utility content
The purpose of the utility model provides a kind of intelligent electric valve positioner exactly for addressing the above problem, and it can accomplish the accurate in locating function, and can move according to control command, thereby response instruction as far as possible rapidly reduces and leaks.
For realizing above-mentioned purpose, the utility model adopts following technological scheme:
A kind of intelligent electric valve positioner, it comprises master control borad, and master control borad is connected with terminal box, and terminal box is connected with upper-position unit through Field bus; Pneumatic assembly is connected with source of the gas through current to pneumatic converter, and current to pneumatic converter then is connected with master control borad; Pneumatic assembly is connected with the valve rod of valve, and actuate valve stem is carried out switch motion; On valve rod, be provided with position limit switch, position limit switch is connected with master control borad; Master control borad also is connected with pressure transducer simultaneously, and pressure transducer is installed on the pipeline of Pneumatic assembly.
Said master control borad is provided with microprocessor.
The intelligent electric valve positioner of the utility model adopts modular assembly, and major module comprises 3 sub-modules such as master control borad, current to pneumatic converter and Pneumatic assembly.Major module need not to tear open in the environment at the scene/connect cable and pneumatic pipeline is replaceable its work.
The utility model working principle: input signal is transferred to the microprocessor on the master control borad through twisted-pair feeder, after computing, converts digital signal to pneumatic signal by current to pneumatic converter, drives pneumatic actuator and makes stroke of regulating valve reach given position.
When input signal increased, the output signal of current to pneumatic converter increased, and through Pneumatic assembly driving execution mechanism, drove valve rod and moved downward.Be connected in stroke detection sensor on the valve rod simultaneously and the position signal of valve rod is fed back to the microprocessor on the master control borad and compare with given signal, the position that is in requirement up to valve rod reaches balance.But when input signal reduced, the output signal of current to pneumatic converter reduced, and through Pneumatic assembly driving execution mechanism, drove valve rod and moved upward.The stroke detection sensor that is connected in simultaneously on the valve rod feeds back to the microprocessor on the master control borad with the position signal of valve rod, compares with given signal, is in new equilibrium position up to valve rod.Whether pressure transducer is used to detect the pneumatic signal pipeline has leakage, if any leak taking place, then by pressure transducer detected information is produced caution or alarm signal and in time handles through digital communication notifying operation personnel or maintainer through microprocessor.
The beneficial effect of the utility model is: because the digital intelligent positioning work piece has adopted microprocessor technology and novel sensor technology and field bus technique; Making it not only is a valve positioner, but the integrated novel intelligent digital controller of intelligent digital controller and valve positioner.It has improved the precision as control loop terminal executive component one modulating valve greatly, makes it reach 0.5%, has greatly improved the regulation quality of control loop.It makes the control function be displaced downwardly to field instrument simultaneously, has realized that the risk of control system is thoroughly disperseed.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Wherein, 1. master control borad, 2. terminal box, 3. Pneumatic assembly, 4. current to pneumatic converter, 5. valve rod, 6. position limit switch, 7. pressure transducer.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Among Fig. 1, a kind of intelligent electric valve positioner, it comprises master control borad 1, and master control borad 1 is connected with terminal box 2, and terminal box 2 is connected with upper-position unit through Field bus; Pneumatic assembly 3 is connected with source of the gas through current to pneumatic converter 4, and 4 of current to pneumatic converters are connected with master control borad 1; Pneumatic assembly 3 is connected with the valve rod 5 of valve, and actuate valve stem 5 is carried out switch motion; On valve rod 5, be provided with position limit switch 6, position limit switch 6 is connected with master control borad 1; Master control borad 1 also is connected with pressure transducer 7 simultaneously, and pressure transducer 7 is installed on the pipeline of Pneumatic assembly 3.Master control borad 1 is provided with microprocessor.
Claims (2)
1. an intelligent electric valve positioner is characterized in that it comprises master control borad, and master control borad is connected with terminal box, and terminal box is connected with upper-position unit through Field bus; Pneumatic assembly is connected with source of the gas through current to pneumatic converter, and current to pneumatic converter then is connected with master control borad; Pneumatic assembly is connected with the valve rod of valve, and actuate valve stem is carried out switch motion; On valve rod, be provided with position limit switch, position limit switch is connected with master control borad; Master control borad also is connected with pressure transducer simultaneously, and pressure transducer is installed on the pipeline of Pneumatic assembly.
2. intelligent electric valve positioner as claimed in claim 1 is characterized in that said master control borad is provided with microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220259549 CN202629254U (en) | 2012-06-05 | 2012-06-05 | Intelligent electric valve locating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220259549 CN202629254U (en) | 2012-06-05 | 2012-06-05 | Intelligent electric valve locating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202629254U true CN202629254U (en) | 2012-12-26 |
Family
ID=47382457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220259549 Expired - Fee Related CN202629254U (en) | 2012-06-05 | 2012-06-05 | Intelligent electric valve locating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202629254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335156A (en) * | 2013-06-13 | 2013-10-02 | 常熟市惠尔石化仪表有限公司 | Intelligent electropneumatic valve positioner |
| CN103727283A (en) * | 2013-12-05 | 2014-04-16 | 常熟市中凯仪表有限公司 | Valve positioning device |
-
2012
- 2012-06-05 CN CN 201220259549 patent/CN202629254U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335156A (en) * | 2013-06-13 | 2013-10-02 | 常熟市惠尔石化仪表有限公司 | Intelligent electropneumatic valve positioner |
| CN103727283A (en) * | 2013-12-05 | 2014-04-16 | 常熟市中凯仪表有限公司 | Valve positioning device |
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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: 20121226 Termination date: 20130605 |