CN201041258Y - Conversion unit of intelligent valve positioner - Google Patents
Conversion unit of intelligent valve positioner Download PDFInfo
- Publication number
- CN201041258Y CN201041258Y CNU2006201113563U CN200620111356U CN201041258Y CN 201041258 Y CN201041258 Y CN 201041258Y CN U2006201113563 U CNU2006201113563 U CN U2006201113563U CN 200620111356 U CN200620111356 U CN 200620111356U CN 201041258 Y CN201041258 Y CN 201041258Y
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- Prior art keywords
- spool
- chamber
- main body
- cavity
- gas circuit
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- Expired - Lifetime
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Abstract
The utility model discloses a conversion unit of an intelligent valve positioner, and comprises a main body, a main body cover, and an air circuit. A valve core composed of a valve core framework and a valve core pad which are fixed and connected together is arranged at the position of an input port between a first cavity in the air circuit and a second cavity in the main body; a ring-shaped salience is arranged on the end surface where the valve core pad is contacted with the man body; a compression spring arranged in the first cavity in the air circuit is held against the valve core framework; a metal embedded element with a through hole is arranged between the second cavity in the main body and a third cavity in the air circuit; a sealing ring is arranged at one end of the through hole of the metal embedded element corresponding to the air circuit; a steel ball with the diameter larger than the inner diameter of the sealing ring is arranged in the third cavity in the air circuit; the compression spring is held against the steel ball; and the steel ball is matched with the sealing ring. As the I/P conversion unit of the valve positioner, the utility model can overcome the deficiency of insufficient rigidity of the valve core in the conversion unit and easy distortion, and the sealing reliability of an input port and an output port of an air source are improved.
Description
Technical field
The utility model relates to a kind of piezo electric valve formula I/P conversion control device, particularly a kind of converting unit of intelligent valve positioner.
Background technique:
Intelligent development along with valve positioner, the I/P converting unit of original employing electromagnetic coil mode can not satisfy the intelligent low power consumption of valve positioner, high-frequency requirement, at present, the I/P converting unit of intelligent valve positioner adopts piezo electric valve to replace electromagnetic coil to finish the control requirement., when control reaches balance, the pressurized air input can not be arranged or discharge for the I/P converting unit of the intelligent valve positioner that adopts piezo electric valve, otherwise product does not just reach ideal control effect.Because, in control system,, will cause the fed sheet of a media instability in the pilot line if the source of the gas of I/P converting unit is imported, delivery outlet has leakage, influence is produced the quality of product or is caused danger.Therefore, the source of the gas of piezo electric valve formula I/P converting unit input, delivery outlet should guarantee sealing, higher reliability is arranged again.But first chamber of the source of the gas inlet opening of existing piezo electric valve formula I/P converting unit and the partition between second chamber normally directly withstand fully contacting of rubber spool and body seal face by pressure spring, form face seal and reach sealing purpose; The partition of second chamber and the 3rd chamber normally directly withstands rubber gasket by pressure spring and fully contacts with the sealing surface of cavity, forms face seal and reaches sealing purpose.Yet this structure has the following disadvantages: a, rubber spool and rubber gasket are stressed separately for a long time, are easy to generate distortion, influence sealing effect; B, because of the rigidity of rubber spool is difficult for holding, limited the further raising of product working pressure; C, owing to adopt face seal, higher to the quality requirement on sealing surface surface, two places; D, when the pressure of first chamber, the 3rd chamber is low, leaking appears in two sealing part easily; E, to the having relatively high expectations of holddown spring, spring force is too big, is difficult for during unlatching opening, spring force is too little, leaks easily again during partition.Owing to there is above-mentioned deficiency, therefore need the I/P converting unit of valve positioner is further improved, improve the source of the gas input of product, the sealing reliability of delivery outlet, reduce scrappage.
Summary of the invention
The purpose of this utility model provides a kind of converting unit of intelligent valve positioner, it is as the I/P converting unit of valve positioner, it is not enough to overcome in the converting unit spool rigidity, and the deficiency of easy deformation improves the sealing reliability of source of the gas input, delivery outlet.
The purpose of this utility model is achieved in that and comprises main body, body cover, gas circuit, place, inlet opening between second chamber in first chamber and the main body in the gas circuit, be provided with the spool that is fixed together by spool skeleton and spool pad, the end face that the spool pad contacts with main body is provided with a circle annular protrusion, pressure spring is set in first chamber in the gas circuit withstands the spool skeleton, the metal insert of a band through hole is set between the 3rd chamber in second chamber and the gas circuit in the main body, corresponding gas circuit one end of metal insert through hole is provided with seal ring, be provided with the steel ball of a diameter greater than internal diameter of the seal ring in the gas circuit in the 3rd chamber, steel ball is withstood with seal ring by pressure spring and cooperates.
Owing to adopted such scheme, place, inlet opening between first chamber of the gas circuit of this converting unit and second chamber of main body, be provided with the spool that is fixed together by spool skeleton and spool pad, the spool skeleton of spool is a metal frame, the spool pad of spool is a rubber pad, the rubber spool pad that is used in sealing rides on the metal spool skeleton, its rigidity is enhanced and is directly not stressed in spring, therefore rubber spool pad is not yielding, the long-term sealing effect that uses can be guaranteed, effective working pressure can also be improved simultaneously.And because the end face that contact with main body of spool pad is provided with one to enclose cross section be semicircular annular protrusion, the formation linear sealing also is improved the reliability of sealing when this annular protrusion and main hole end in contact.And corresponding gas circuit one end of through hole of the metal insert that is provided with between the 3rd chamber of second chamber of main body and gas circuit is provided with seal ring, adopt a diameter to cooperate the formation sealing with seal ring greater than the steel ball of internal diameter of the seal ring, owing to adopt steel ball to cooperate with seal ring as seal arrangement, same formation linear sealing also is improved the reliability of sealing; And steel ball can not be out of shape under the pressure of air pressure and spring, can guarantee the long-term sealing effect that uses, and can also improve effective working pressure simultaneously.
Sealing effect of the present utility model is better than the sealing effect of the piezo electric valve formula I/P converting unit of former intelligent valve positioner, adopts this structure, can also reduce the processing of part and the assembling difficulty of parts, has improved product percent of pass greatly.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Referring to accompanying drawing, the converting unit of this intelligent valve positioner comprises gas circuit 1, main body 6, the body cover 8 that links together by screw successively.Be equipped with second piezo electric valve, 9, the second piezo electric valves 9 in second back pressure cavity that body cover 8 is provided with and contact with diaphragm 10 in being installed in main body 6, the air inlet spool 11 of assembling contacts on diaphragm 10 and the main body 6; Be equipped with first piezo electric valve, 7, the first piezo electric valves 7 in first back pressure cavity that body cover 8 is provided with and contact with diaphragm 5 in being installed in main body 6, the exhaust plug 4 of assembling contacts on diaphragm 5 and the main body 6.Place, inlet opening between the second chamber P2 in the first chamber P1 and the main body 6 in the gas circuit 1, a spool of closing the inlet opening that is fixed together by metal spool skeleton 13 and rubber spool pad 12 is set, the guiding axostylus axostyle that is provided with step of metal spool skeleton 13 passes rubber spool pad 12 and metal spool skeleton 13 base plate interference fit, rubber spool pad 12 press-fited be fixed on the metal spool skeleton 13, be provided with the base plate that withstands spool skeleton 13 for the pressure spring 14 of taper in the first chamber P1 in the gas circuit, the guiding axostylus axostyle of metal spool skeleton 13 is linked to each other with air inlet spool 11.The end face that rubber spool pad 12 contacts with main body 6 is provided with a circle annular protrusion, and the cross section of circle annular protrusion is semicircle, rubber spool pad 12 is contacted with the sealing of main body 6 form line contact sealing.The metal insert 15 of a band through hole is set between second chamber P2 of main body 6 and the 3rd chamber P3 of gas circuit 1, this metal insert 15 is interference fitted on the main body 6, corresponding gas circuit 1 one ends of the through hole of metal insert 15 are provided with seal ring 18, be provided with the steel ball 16 of a diameter greater than seal ring 18 internal diameters in the gas circuit 1 in the 3rd chamber P3, steel ball 16 is withstood with seal ring 18 by pressure spring 17 and cooperates.Relief opening on the main body 6 is communicated with the 3rd chamber P3 of gas circuit 1, and it connects and to be provided with seal ring 2, and the exhaust plug 4 that main body 6 is provided with extends and causes relief opening, and exhaust plug 4 is withstood by Returnning spring 3, contacts with diaphragm 5 in being installed in main body 6.
The converting unit of this intelligent valve positioner is a kind of piezo electric valve formula I/P converting unit, after this converting unit is installed on the complete machine, connect pressurized air, source of the gas enters the first chamber P1 and acts on the spool, at this moment the inlet opening is by seal spool, and the first chamber P1 and the second chamber P2 cut off.By control impuls first piezo electric valve is started working, have enough pressure to promote diaphragm, exhaust plug in first back pressure cavity, overcome resistance such as Returnning spring and move down, relief opening is shut.When second piezo electric valve is started working, produce pressure in second back pressure cavity, the spool that promotes diaphragm, air inlet spool, inlet opening moves down, and overcomes the effect of power such as volute spring, source of the gas, friction, opens the inlet opening.Source of the gas enters the second chamber P2, overcomes pressure spring power, pushes steel ball open and enters chamber P3, and pressurized air promotes pneumatic actuator by delivery outlet and arrives specified position.After pneumatic actuator arrives specified position, remove the control impuls of second piezo electric valve, pressure in second back pressure cavity is laid down, the spool of inlet opening is closed the inlet opening under the effect of volute spring, source of the gas, the air pressure vanishing of the second chamber P2, under the effect of the pressure of the 3rd chamber P3 and holddown spring, steel ball cooperates with seal ring and forms sealing, the second chamber P2 and the 3rd chamber P3 are cut off fully, make the air pressure of the 3rd chamber P3 remain on the pressure that needs.If will lay down the pressure of the 3rd chamber P3, only need remove the control impuls of first piezo electric valve, the pressure in first back pressure cavity is laid down, and Returnning spring promotes exhaust plug can finish Exhaust Open.
Claims (4)
1. the converting unit of an intelligent valve positioner, comprise main body, body cover, gas circuit, it is characterized in that: place, the inlet opening between second chamber in first chamber and the main body in the gas circuit, a spool that is fixed together by spool skeleton and spool pad is set, the end face that the spool pad contacts with main body is provided with a circle annular protrusion, pressure spring is set in first chamber in the gas circuit withstands the spool skeleton, the metal insert of a band through hole is set between the 3rd chamber in second chamber and the gas circuit in the main body, corresponding gas circuit one end of metal insert through hole is provided with seal ring, be provided with the steel ball of a diameter greater than internal diameter of the seal ring in the gas circuit in the 3rd chamber, steel ball is withstood with seal ring by pressure spring and cooperates.
2. the converting unit of intelligent valve positioner according to claim 1, it is characterized in that: the spool skeleton of spool is a metal frame, the spool pad of spool is a rubber pad.
3. the converting unit of intelligent valve positioner according to claim 1 and 2 is characterized in that: the cross section of a circle annular protrusion of the end face that the spool pad contacts with main body is for semicircle.
4. the converting unit of intelligent valve positioner according to claim 1 is characterized in that: the pressure spring that is provided with in first chamber is a volute spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201113563U CN201041258Y (en) | 2006-09-18 | 2006-09-18 | Conversion unit of intelligent valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201113563U CN201041258Y (en) | 2006-09-18 | 2006-09-18 | Conversion unit of intelligent valve positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041258Y true CN201041258Y (en) | 2008-03-26 |
Family
ID=39252964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201113563U Expired - Lifetime CN201041258Y (en) | 2006-09-18 | 2006-09-18 | Conversion unit of intelligent valve positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041258Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216664A (en) * | 2013-04-24 | 2013-07-24 | 玖龙纸业（太仓）有限公司 | Intelligent valve locator |
-
2006
- 2006-09-18 CN CNU2006201113563U patent/CN201041258Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216664A (en) * | 2013-04-24 | 2013-07-24 | 玖龙纸业（太仓）有限公司 | Intelligent valve locator |
| CN103216664B (en) * | 2013-04-24 | 2015-05-27 | 玖龙纸业（太仓）有限公司 | Intelligent valve locator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING CHUANYI AUTOMATION CO., LTD. Free format text: FORMER OWNER: CHINA SILIAN INSTRUMENT GROUP CO., LTD TECHNOLOGY CENTER Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: No. 1, Renmin Road, Beibei District, Chongqing, China: 400700 Patentee after: Chongqing Sichuan Instrument Complex Co., Ltd. Address before: No. 61, middle Mount Huangshan Avenue, North New District, Chongqing: 401121 Patentee before: Technical Center of China Silan Instrument Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080326 |
|
| EXPY | Termination of patent right or utility model |