CN2532337Y - Electric valve positioner - Google Patents
Electric valve positioner Download PDFInfo
- Publication number
- CN2532337Y CN2532337Y CN 02215600 CN02215600U CN2532337Y CN 2532337 Y CN2532337 Y CN 2532337Y CN 02215600 CN02215600 CN 02215600 CN 02215600 U CN02215600 U CN 02215600U CN 2532337 Y CN2532337 Y CN 2532337Y
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- CN
- China
- Prior art keywords
- power amplifier
- pneumatic
- pneumatic power
- air pressure
- valve positioner
- 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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Abstract
The utility model relates to an electrical valve positioner, in particular to an electrical valve positioner which is provided with a small-sized air pressure reducer (1), a pneumatic power amplifier (2), a feedback cam (3) and constant orifice (4) at an air source end. Wherein, the air pressure reducer (1) is composed of a valve core (1-1), a diaphragm assembly (1-2) and a set spring (1-3); the pneumatic power amplifier (2) is composed of a back pressure chamber (2-1), a double diaphragm assembly (2-2), a valve core (2-3) and a porous plate (2-4); the constant orifice (4), a nozzle (5) and a baffle (14) compose a pneumatic amplifying element. The utility model has the advantages that no need to install on site and accident probability is reduced. The pneumatic power amplifier (2) uses a double diaphragm assembly with energy saving effect, and the working performance of the positioner is stable and reliably; the utility model can provide orifice elements in different pore diameters for pneumatic actuating mechanism with small and large stroke to match and select after adopting the constant orifice technique.
Description
Technical field:
The utility model relates to a kind of electropneumatic valve positioner, especially wherein has the electropneumatic valve positioner of small air decompressor, pneumatic power amplifier, feedback cam and constant throttling orifice, goes into F16K37/00.
Background technique:
The complete use of electropneumatic valve positioner and pneumatic control valve, in order to static characteristic and the dynamic characteristic of improving pneumatic control valve, overcome the deviation that valve rod frictional resistance and spool unbalanced force produce stroke, thereby the stroke of the control signal of making and pneumatic control valve is realized correct location.The electropneumatic valve positioner air pressure reducer of joining provided for ordering goods separately in the past, needed at the scene pipe arrangement to install, thereby smear metal or foreign matter are brought into and produced fault in the positioning work piece during easily with pipe arrangement, cause regulating valve system undesired, incur loss through delay the duration.Amplifier is the heart component of positioning work piece, how can adaptive small size pneumatic actuator and large scale pneumatic actuator and can satisfy its characteristic requirement, and be a big disadvantage of pneumatic power amplifier in the past.Feedback cam in the positioning work piece can only satisfy the single characteristic requirement, as usage requirements such as straight journey, angle stroke, linear characteristic, equal percentage characteristics, can only indicate in order, and this has just placed restrictions on the positioning work piece using scope, and the user feels to use extremely inconvenient.After the aperture of same constant throttling orifice was determined, the characteristic of its " nozzle one plate washer " was just fixing, therefore for the actuator by stroke, sensitivity is too high, easily cause the modulating valve vibration, make regulating system produce disturbance, badly influence the safe operation of robot control system(RCS).
Summary of the invention:
The purpose of this utility model is that a kind of electropneumatic valve positioner will be provided, the major technique feature of this electropneumatic valve positioner is at source of the gas end band small air decompressor, pneumatic power amplifier and feedback cam and constant throttling orifice, to solve the deficiency of existing electropneumatic valve positioner.Therefore adopt following technological scheme to implement: air pressure reducer is made up of spool, diaphragm unit, setting spring, and be directly installed on the positioning work piece with board-like Placement, spool is connected with fastening piece with diaphragm unit, and setting spring is fixed on the spring seat of diaphragm unit.Pneumatic power amplifier is made of back pressure chamber, two diaphragm unit, spool and porous slab, is installed in the housing of pneumatic power amplifier.And pneumatic power amplifier communicates with air pressure reducer and actuator.Constant throttling orifice, nozzle and plate washer constitute a pneumatic amplifier element, and wherein constant throttling orifice communicates with nozzle and back pressure chamber, and is separately fixed on the housing, and plate washer is installed on the main lever of torque motor.The aperture of constant throttling orifice varies in size according to the stroke with the pneumatic actuator that is mated and matches use.The feedback cam is fixed on the housing, and straight journey, angle stroke, linear characteristic are designed on a lobe plate, can select the working surface of cam curve as required for use.All the other structures and existing electropneumatic valve positioner are same or similar.The electropneumatic valve positioner of making by such scheme compared with prior art has following advantage: need not the on-the-spot connection of installing after 1, having the small air decompressor, chipless and foreign matter enter positioning work piece, will reduce the accident probability of positioning work piece greatly; 2, pneumatic power amplifier adopts two diaphragms not consume depressed structure, and characteristics are that air consumption is few, energy saving, and make the potentiometer stable and reliable working performance; 3, can provide the constant throttling orifice element in different apertures behind the employing constant throttling orifice, select for use so that be respectively applied for the pneumatic actuator coupling of positioning work piece and large and small stroke.
Description of drawings:
The structural representation of accompanying drawing 1, electropneumatic valve positioner.
Embodiment:
Electropneumatic valve positioner of the present utility model as shown in Figure 1, it is made up of air pressure reducer [1], pneumatic power amplifier [2], feedback cam [3], constant throttling orifice [4], torque motor [12] and actuator's component such as [6].Wherein air pressure reducer [1] is made up of spool [1-1], diaphragm unit [1-2], setting spring [1-3], and be directly installed on the positioning work piece with board-like Placement, spool is connected with fastening piece with diaphragm unit, and setting spring is fixed on the spring seat of diaphragm unit.Pneumatic power amplifier [2] is made of back pressure chamber [2-1], two diaphragm unit [2-2], spool [2-3] and porous slab [2-4], be installed in the housing of pneumatic power amplifier, and pneumatic power amplifier communicates with air pressure reducer and actuator.Constant throttling orifice [4], nozzle [5] and plate washer [14] constitute a pneumatic amplifier element, wherein constant throttling orifice communicates with nozzle and back pressure chamber, and be separately fixed on the housing, plate washer is installed on the main lever of torque motor, the feedback cam is fixed on the housing, electrical junction box [13] is installed on the housing, valve rod [7] is connected with pneumatic actuator [6] and connecting rod [8], lever [11] is connected with connecting rod [8], feedback spring [10] is connected with torque motor with lever respectively, all the other structures are same as the prior art or similar, press the electropneumatic valve positioner that the said structure form is made, after current signal inserts positioning work piece input end [13], enter the torque motor [12] of positioning work piece and produce electromagnetic force, make plate washer [14] near nozzle [5], air pressure reducer this moment [1] enters bleed pressure decompression back flow path constant throttling orifice [4] back pressure chamber [2-1] of pneumatic power amplifier [2], behind diaphragm unit [2-2] pressurized to bottom offset, spool [2-3] is opened, air pressure exports to the air chamber of pneumatic actuator [6] from amplifier [2], make valve rod [7] produce stroke, drivening rod [8], make cam [3] by clockwise rotating, lever [11] is produced corner, feedback spring [10] is stretched, make plate washer [14] leave nozzle [5], this moment, the stroke of pneumatic actuator just rested on this position.It more than is the process that electropneumatic valve positioner converts the current signal of input to the pneumatic actuator stroke.Otherwise, as when reducing input current signal, then positioning work piece is the negative actuation of above-mentioned action, the result reduces stroke.
Claims (1)
1, a kind of by air pressure reducer [1], pneumatic power amplifier [2], feedback cam [3], constant throttling orifice [4], the electropneumatic valve positioner that torque motor [12] and actuator [6] form, it is characterized in that air pressure reducer [1] is by spool [1-1], diaphragm unit [1-2], setting spring [1-3] is formed, and be directly installed on the positioning work piece with board-like Placement, spool is connected with fastening piece with diaphragm unit, setting spring is fixed on the spring seat of diaphragm unit, pneumatic power amplifier [2] is by back pressure chamber [2-1], two diaphragm units [2-2], spool [2-3] and porous slab [2-4] constitute, be installed in the housing of pneumatic power amplifier, pneumatic power amplifier [2] communicates with air pressure reducer [1] and actuator [6], constant throttling orifice [4], nozzle [5] and plate washer [14] constitute a pneumatic amplifier element, wherein constant throttling orifice communicates with nozzle and back pressure chamber, and be separately fixed on the housing, plate washer is installed on the main lever of torque motor, and the feedback cam is fixed on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215600 CN2532337Y (en) | 2002-02-05 | 2002-02-05 | Electric valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215600 CN2532337Y (en) | 2002-02-05 | 2002-02-05 | Electric valve positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532337Y true CN2532337Y (en) | 2003-01-22 |
Family
ID=33694707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02215600 Expired - Fee Related CN2532337Y (en) | 2002-02-05 | 2002-02-05 | Electric valve positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2532337Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749481A (en) * | 2010-02-10 | 2010-06-23 | 常熟市惠尔石化仪表有限公司 | Matching structure of electrical valve positioner and actuator for industrial process control |
| CN102207222A (en) * | 2010-03-31 | 2011-10-05 | 株式会社山武 | Electro-pneumatic positioner and electro-pneumatic converting device |
| CN103148281A (en) * | 2013-03-20 | 2013-06-12 | 常熟市华夏仪表有限公司 | Stepless electric valve positioner |
| CN103353006A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Compact type electric valve positioner |
| CN103353008A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Locator based on force balance principle |
| CN103353013A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Pneumatic valve positioner |
| CN103353012A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Cam structure of valve positioner |
| CN103353018A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Zero point and range adjustment device for positioner |
| CN104565507A (en) * | 2013-10-29 | 2015-04-29 | 阿自倍尔株式会社 | Positioner |
| CN106090386A (en) * | 2016-06-27 | 2016-11-09 | 常熟市维特隆自动化仪表厂 | Electropneumatic valve positioner |
| CN108679294A (en) * | 2018-07-30 | 2018-10-19 | 辰星仪表（成都）有限公司 | Differential type nozzle flapper pressure regulating device |
-
2002
- 2002-02-05 CN CN 02215600 patent/CN2532337Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749481A (en) * | 2010-02-10 | 2010-06-23 | 常熟市惠尔石化仪表有限公司 | Matching structure of electrical valve positioner and actuator for industrial process control |
| CN101749481B (en) * | 2010-02-10 | 2011-07-20 | 常熟市惠尔石化仪表有限公司 | Matching structure of electrical valve positioner and actuator for industrial process control |
| CN102207222A (en) * | 2010-03-31 | 2011-10-05 | 株式会社山武 | Electro-pneumatic positioner and electro-pneumatic converting device |
| CN102207222B (en) * | 2010-03-31 | 2013-08-28 | 阿自倍尔株式会社 | Electro-pneumatic positioner and electro-pneumatic converting device |
| CN103148281A (en) * | 2013-03-20 | 2013-06-12 | 常熟市华夏仪表有限公司 | Stepless electric valve positioner |
| CN103353008A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Locator based on force balance principle |
| CN103353006A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Compact type electric valve positioner |
| CN103353013A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Pneumatic valve positioner |
| CN103353012A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Cam structure of valve positioner |
| CN103353018A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Zero point and range adjustment device for positioner |
| CN104565507A (en) * | 2013-10-29 | 2015-04-29 | 阿自倍尔株式会社 | Positioner |
| CN106090386A (en) * | 2016-06-27 | 2016-11-09 | 常熟市维特隆自动化仪表厂 | Electropneumatic valve positioner |
| CN108679294A (en) * | 2018-07-30 | 2018-10-19 | 辰星仪表（成都）有限公司 | Differential type nozzle flapper pressure regulating 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: 20030122 |