CN2101151U - Pnematic valve positioning deivce - Google Patents
Pnematic valve positioning deivce Download PDFInfo
- Publication number
- CN2101151U CN2101151U CN 91219071 CN91219071U CN2101151U CN 2101151 U CN2101151 U CN 2101151U CN 91219071 CN91219071 CN 91219071 CN 91219071 U CN91219071 U CN 91219071U CN 2101151 U CN2101151 U CN 2101151U
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- CN
- China
- Prior art keywords
- valve
- pneumatic
- utility
- cam
- spring
- 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 - Lifetime
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Abstract
The utility model relates to a pneumatic valve positioning device which is auxiliary equipment used in the pneumatic executing agency of departments of petroleum, chemical engineering, electric power, metallurgy and light industry. The pneumatic valve positioning device adopts optimum design of cam split-ranging geometric curved surface, changes the effective coil number of springs and sets zero on the outside. The utility model uses closed loop control principle. The input signal is compared with the feedback signal of the position of the executing agency, and necessary energy is generated to push valve rods. When the pressure of a spring (5) achieves moment balance with a bellows (1) on the balance arm, certain signal pressure shifts corresponding to a certain pressure valve rod, and accurate positioning is realized.
Description
The utility model relates to the improvement invention of pneumatic positioner valve, is a kind of auxiliary device of pneumatic actuator.
In the prior art, valve positioner is in order to improve the performance characteristic of pneumatic control valve, overcome valve rod frictional force, offset and transferred pressure medium to change the spool unbalanced force that causes, thereby make the control signal of valve location corresponding to final controlling element, realize correct location, known pneumatic positioner valve, after a minute journey signal entered bellows component, the work source of the gas was through amplifier, to the pressure reduction of final controlling element by the variation in pressure generation, make displacement of valve rod, and rotate by cam mechanism feedback spring is stretched, obtain equalising torque at main lever the most at last, at this moment, certain branch journey signal is realized the proportional action of piston actuator corresponding to certain valve rod travel.But this positioning work piece has its deficiency, and the cam machine mechanism is the one way geometric curved surfaces, because the pressure difference of source of the gas signal needs to change cam, and the zero setting mechanism of positioning work piece is located in the body, and very trouble seems during work.
In view of the problem that known technology exists, the purpose of this utility model is to provide a kind of need not change cam, the pneumatic positioner valve that can adjust the active spring coils number and can return to zero outside body.
The utility model is finished as follows, bellows (1) balance arm (2) is housed in the housing that includes reading indicator and vent cover, spring (5), valve body (9) intermediate (10) that has plunger (8), swing arm (13) and cam (12), cam (12) is for dividing the geometric curved surfaces of journey SC sigmal control, as shown in Figure 1, accept 20--100 respectively, 20--60, the bleed pressure of 60--100KPA, on spring (5), be provided with adjusting screw (3) (4) and adjust nut (14), in order to adjust the number of active coils of spring (5), convenient for the zeroing of valve positioner, in vent cover, be provided with whole valve screw (6).
When the utility model is worked, the source of the gas signal enters bellows (1) bellows displacement, promote balance arm (2), driving pneumatic power amplifier plunger (8) moves, after amplifying, work source of the gas amplifier imports cylinder respectively, not shown (piston type final controlling element) both sides, the cylinder both sides are because of the pressure difference, produce and move, the drive regulating valve rod rotates, move according to different signals, simultaneously the valve rod corner that drives cam (12) becomes the cam displacement, promotes balance arm (2) by spring (5) compression, when spring (5) spoon pressure and bellows (1) reach equalising torque on balance arm, certain signal pressure can be realized correct positioning in certain displacement of valve rod.
The utility model is compared with known technology, adopt the cam of the geometric curved surfaces that divides the journey SC sigmal control, the active spring coils number be in harmonious proportion outside balancing controls, it is clear and definite to have indication, easy to operate, and simple in structure, highly sensitive, press the pneumatic valve of the utility model design motif made and decide device, supporting with pneumatic control valve, will produce positive using effect.
The utility model has following accompanying drawing
Fig. 1 is a structural representation of the present utility model
Accompanying drawing has been represented structure of the present utility model: followingly in conjunction with the accompanying drawings other embodiments' relevant details is done to describe further again, bellows (1) is housed in the housing that has reading indicator and vent cover (7), balance arm (2), spring (5) has the valve body (9) of plunger (8), intermediate (10), swing arm (13) and cam (12), the valve body (9) and the intermediate (10) that have plunger (8) are formed amplifier, being provided with adjusting screw (3) (4) adjustment nut (14) on the spring seat that has spring (5) cooperates with spring joint (11) in order to adjust the number of active coils of spring, be convenient outside zeroing, in vent cover, be provided with and adjust screw (6), the cam of present embodiment (12) is designed to three sections geometric curved surfaces, accept 20-100 respectively, 20-60, the branch journey signal of 60--100KPA has been eliminated known technology is changed cam owing to different branch journey signal sources trouble.
Claims (4)
1, a kind of pneumatic positioner valve, valve body (9), intermediate (10), swing arm (13) and cam (12) that bellows (1), balance arm (2), spring (5) have plunger (8) are housed in the housing that includes indicator and vent cover, and the cam (12) that is characterised in that of the present utility model is the geometric curved surfaces of branch journey SC sigmal control.
2, pneumatic positioner valve as claimed in claim 1 is characterized in that the branch journey signal of cam (12) is respectively 20--100,20--60,60--100KPA.
3, pneumatic positioner valve as claimed in claim 1 is characterized in that spring (5) is provided with adjusting screw (3) (4) and adjusts nut (14).
4, pneumatic positioner valve as claimed in claim 1 is characterized in that being provided with in the vent cover (7) adjustment screw (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91219071 CN2101151U (en) | 1991-07-24 | 1991-07-24 | Pnematic valve positioning deivce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91219071 CN2101151U (en) | 1991-07-24 | 1991-07-24 | Pnematic valve positioning deivce |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2101151U true CN2101151U (en) | 1992-04-08 |
Family
ID=4926410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91219071 Expired - Lifetime CN2101151U (en) | 1991-07-24 | 1991-07-24 | Pnematic valve positioning deivce |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2101151U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235537A (en) * | 2010-04-08 | 2011-11-09 | 株式会社永泰 | Torque motor device for valve positioner |
| CN103133759A (en) * | 2013-03-20 | 2013-06-05 | 常熟市华夏仪表有限公司 | Electropneumatic valve positioner based on two-position-type limit switch |
| 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 |
| CN103353012A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Cam structure of valve positioner |
-
1991
- 1991-07-24 CN CN 91219071 patent/CN2101151U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235537A (en) * | 2010-04-08 | 2011-11-09 | 株式会社永泰 | Torque motor device for valve positioner |
| CN103133759A (en) * | 2013-03-20 | 2013-06-05 | 常熟市华夏仪表有限公司 | Electropneumatic valve positioner based on two-position-type limit switch |
| CN103133759B (en) * | 2013-03-20 | 2014-07-09 | 常熟市华夏仪表有限公司 | Electropneumatic valve positioner based on two-position-type limit switch |
| 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 |
| CN103353012A (en) * | 2013-07-26 | 2013-10-16 | 常熟市华夏仪表有限公司 | Cam structure of valve positioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |