CN102620025A - Double-acting conversion unit for valve positioner - Google Patents
Double-acting conversion unit for valve positioner Download PDFInfo
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- CN102620025A CN102620025A CN2012100922429A CN201210092242A CN102620025A CN 102620025 A CN102620025 A CN 102620025A CN 2012100922429 A CN2012100922429 A CN 2012100922429A CN 201210092242 A CN201210092242 A CN 201210092242A CN 102620025 A CN102620025 A CN 102620025A
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Abstract
The invention provides a double-acting conversion unit for a valve positioner. The double-acting conversion unit is simple in structure and is arranged in a single-plate way. An exhaust valve seat and an intake valve seat are of respectively a plate type structure and are arranged in a laminated way; and axes of the intake valve and the exhaust valve are respectively perpendicular to the plate surface of the valve seat. The double-acting conversion unit is simple in integral structure, low in mechanical processing cost and easy in part assembly. A rubber valve core for sealing is supported on a metal framework, so that the rigidity of the rubber valve core is enhanced; and in addition, rubber is not directly stressed to the spring, so that the valve core is not easy to deform, the sealing effect for a long time can be ensured and the effective work pressure can be effectively improved simultaneously. The rubber valve core and an annular lug boss of the sealed end surface of the valve seat form linear sealing, so that the sealing reliability is improved.
Description
Technical field
The present invention relates to the automatic control technology field, especially relate to the I/P converting unit of valve positioner.
Background technique
Perfect along with the function of intelligent valve positioner, the I/P converting unit of original employing electromagnetic coil mode can not satisfy valve positioner intellectuality, low power consumption, high-frequency requirement.At present, the I/P converting unit of intelligent valve positioner adopts piezo electric valve to replace the solenoid controlled requirement.
In control system, if the source of the gas of I/P converting unit input, delivery outlet have leakage, will cause the constantly vibration of valve location, cause the instability of fed sheet of a media in the pilot line, influence the quality of product or cause danger.Therefore, the source of the gas of piezo electric valve formula I/P converting unit input, delivery outlet must guarantee reliable sealing performance.
But the chamber of existing piezo electric valve formula I/P converting unit and the partition between the chamber normally directly withstand the rubber spool by spring or rubber gasket contacts with valve seat, form the purpose that sealing surface reaches sealing.
Not enough below this structure exists:
1, rubber spool and rubber gasket receive spring force for a long time, are easy to generate distortion, influence sealing effect;
2, the rigidity because of the rubber spool is difficult for holding, and has limited the further raising of product working pressure;
3, because the employing face seal is higher to the quality requirement on sealing surface surface;
4, when the pressure of chamber hanged down, leaking appearred in sealing part easily;
5, to the having relatively high expectations of holddown spring, spring force is too big, is difficult for during unlatching opening, and spring force is too little, leaks easily again during partition.
In addition, the complex structure of existing converting unit, processing and assembling difficulty are bigger.
Owing to have above-mentioned deficiency, therefore, need do further to improve to the I/P converting unit of valve positioner; Simplify the structure of converting unit; It is not enough to overcome in the converting unit spool rigidity simultaneously, and the deficiency of easy deformation improves the sealing reliability of source of the gas input, delivery outlet.
Summary of the invention
In order to overcome the defective of above-mentioned existing technology, the present invention provides a kind of subbase mounted converting unit simple in structure, is used for intelligent valve positioner.
The present invention is for solving the problems of the technologies described above; It is to rely on following technical proposals to realize: the double-action converting unit that is used for valve positioner; This converting unit comprises: a board-like delivery valve seat, two board-like inlet valve seats, the end cap of two built-in piezo electric valves; Two air inlet diaphragms, two exhaust diaphragms.Converting unit is a symplex structure, and end cap, air inlet diaphragm, inlet valve seat, exhaust diaphragm, delivery valve seat, exhaust diaphragm, inlet valve seat, air inlet diaphragm, end cap stack gradually arrangement.Be respectively arranged with the suction valve that the control source of the gas is communicated with first delivery outlet or second delivery outlet on two inlet valve seats; Delivery valve seat is provided with the outlet valve of controlling first delivery outlet or second delivery outlet connection relief opening respectively.
Wherein, delivery valve seat is provided with first chamber that connects suction port, and first chamber is communicated to the plate face of two parallel symmetries of delivery valve seat; Delivery valve seat is provided with the 3rd chamber that connects first delivery outlet, connects the 5th chamber of second delivery outlet; The 3rd chamber and the 5th chamber inversion symmetry are communicated to a plate face of delivery valve seat respectively.Be provided with the outlet valve of two inversion symmetry in the delivery valve seat, the axis normal of outlet valve is in the plate face of delivery valve seat; Moving axially of outlet valve, control respectively the 3rd chamber and the 5th chamber separately with delivery valve seat on the conducting or the partition of relief opening.
Wherein, be respectively arranged with second chamber and the 4th chamber on two inlet valve seats, second chamber and the 4th chamber are communicated to a plate face of inlet valve seat respectively, and chamber pressure acts on respectively on the exhaust diaphragm.The axis normal of the suction valve in the inlet valve seat is in the plate face of inlet valve seat; Moving axially of suction valve, control respectively second chamber or the 4th chamber separately with the conducting or the partition of first chamber of delivery valve seat.Inlet valve seat is provided with one-way valve, and this one-way valve is respectively applied for the unidirectional conducting of second chamber to the 5th chamber of delivery valve seat, or the 4th chamber is to the unidirectional conducting of the 3rd chamber of delivery valve seat.
Wherein, be provided with the back pressure cavity that acts on the air inlet diaphragm in the end cap, the Pneumatic pipe cleaner of this back pressure cavity is crossed the control of piezo electric valve, promotes the air inlet diaphragm and drives moving axially of suction valve conducting.The control that Pneumatic pipe cleaner in second chamber or the 4th chamber is crossed suction valve promotes the exhaust diaphragm respectively and drives moving axially of outlet valve conducting.
Further, suction valve and outlet valve include valve rod, spool and spool skeleton; The periphery of spool and top place in the spool skeleton, and the end of valve rod penetrates the center of spool; The outer installment of spool skeleton has spring, acts on moving axially of suction valve or outlet valve partition.
Further, the valve rod afterbody of outlet valve is provided with valve pad and exhaust gas drive plate, and the afterbody of valve rod penetrates the center of valve pad, and the stepped shape periphery of valve pad places the center of exhaust gas drive plate; The exhaust gas drive plate contacts with the exhaust diaphragm, corresponds respectively to second chamber and the acting surface of the 4th chamber on the exhaust diaphragm of two inlet valve seats.
Further, the valve rod afterbody of suction valve is provided with valve pad and air inlet driving plate, and the afterbody of valve rod penetrates the center of valve pad, and the stepped shape periphery of valve pad places the center of air inlet driving plate; The air inlet driving plate contacts with the air inlet diaphragm, corresponding to the acting surface of the back pressure cavity in the end cap on the air inlet diaphragm.
Further, the exterior edge face that the ingress of second chamber or the 4th chamber contacts with spool is respectively equipped with an annular protrusion; The interior edge face that the outlet port of the 3rd chamber and the 5th chamber contacts with spool is respectively equipped with an annular protrusion.
Further, one-way valve comprises valve pocket, pressure spring and ball sealer; Ball sealer is withstood on the sealing surface outside the second chamber P2 or the 4th chamber P4 outlet by the pressure spring in the valve pocket.
Further, the material of spool is a rubber; The material of ball sealer is a rubber; The spool skeleton is a metallic material.
Compared with prior art, adopt the advantage of technological scheme of the present invention to be:
1. delivery valve seat and inlet valve seat are plank frame, range upon range of installation, and the axis of suction valve, outlet valve all the plate face with valve seat is vertical.So unitary construction is simple, machining cost is low, and the parts assembling is easy, and the up-to-standard rate of product is high.
2. the spool skeleton is a metal frame, and the rubber spool that is used to seal rides in metal frame, and its rigidity is enhanced; And rubber is directly not stressed in spring, so spool is not yielding, can guarantee the long-term sealing effect that uses, and can also improve effective working pressure simultaneously.
3. because the annular protrusion of the seal face of rubber spool and valve seat forms linear sealing, the reliability of sealing also is improved.
4. the one-way valve in the inlet valve seat, the linear sealing that rubber seal ball that is withstood by pressure spring and cavity form, reliability also is improved.
Description of drawings
Fig. 1 is used for the structural representation of the double-action converting unit of valve positioner for the present invention.
Fig. 2 is used for the schematic diagram of the double-action converting unit folk prescription of valve positioner to effect for the present invention.
Fig. 3 is that gas of the present invention is in the schematic diagram of the double-action converting unit other direction effect of valve positioner.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
The present invention is used for the double-action converting unit of valve positioner, comprises 17, two exhaust diaphragms 18 of 1, two air inlet diaphragm of end cap of 2, two built-in piezo electric valves 14 of 6, two board-like inlet valve seats of a board-like delivery valve seat.
Referring to the embodiment of accompanying drawing 1 converting unit, can see among the figure, successively the end cap 1 of symmetric arrays, air inlet diaphragm 17, inlet valve seat 2, exhaust diaphragm 18, delivery valve seat 6, exhaust diaphragm 18, inlet valve seat 2, air inlet diaphragm 17 and end cap 1.Connect through screw between them, be fixed together.
Be provided with back pressure cavity in the end cap 1, and piezo electric valve 14 is installed, the Pneumatic pipe cleaner of back pressure cavity is crossed the control of piezo electric valve 14.The pressure that piezo electric valve 14 produces in back pressure cavity acts on the one side of air inlet diaphragm 17, and air inlet diaphragm 17 another sides contact with the air inlet driving plate 15 of assembling in the inlet valve seat 2.
Board-like delivery valve seat 6 is provided with the first chamber P1 that connects suction port IN, and the first chamber P1 runs through the plate face of two parallel symmetries that are communicated to delivery valve seat 6.Also be provided with the 3rd chamber P3 that is connected with the first delivery outlet OUT1 respectively on the delivery valve seat 6, be connected the 5th chamber P5 with the second delivery outlet OUT2, the 3rd chamber P3 and the 5th chamber P5 inversion symmetry, symmetrical connection is to a plate face of delivery valve seat 6 respectively.The rear of the 3rd chamber P3 and the 5th chamber P5 on the delivery valve seat 6 also is provided with the relief opening EX that is communicated with atmosphere.
Be respectively arranged with the second chamber P2 or the 4th chamber P4 on two inlet valve seats 2, the second chamber P2 is communicated to the plate face that two inlet valve seats 2 contact with exhaust diaphragm 18 respectively with the 4th chamber P4, and the air pressure in the chamber acts on respectively on two exhaust diaphragms 18.
The two-port of the first chamber P1 of delivery valve seat 6 is respectively towards second chamber P2 of inlet valve seat 2 and the ingress of the 4th chamber P3; In inlet valve seat 2, the ingress of the ingress of the second chamber P2 and the 4th chamber P3 is respectively arranged with suction valve.The axis normal of suction valve is in the plate face of board-like inlet valve seat 2; Moving axially of suction valve, control respectively the second chamber P2 or the 4th chamber P4 separately with conducting or the partition of the first chamber P1 of delivery valve seat 6.
In delivery valve seat 6, the 3rd chamber P3 and the 5th chamber P5 lead to the outlet port of relief opening EX respectively, are respectively arranged with the outlet valve of inversion symmetry.The axis normal of outlet valve is in the plate face of board-like delivery valve seat 6; Moving axially of outlet valve, control respectively the 3rd chamber P3 and the 5th chamber P5 separately with delivery valve seat 6 on conducting or the partition of relief opening EX.
Above-mentioned suction valve and outlet valve include valve rod 5, spool 7 and spool skeleton 8.The little round platform of valve rod 5 ends penetrates the center of spool 7, and the periphery of spool 7 and top place in the spool skeleton 8.Valve rod 5, spool 7 and spool skeleton 8 are radial interference fit, are fixed together.The material of spool 7 is generally selected rubber for use, and spool skeleton 8 is a metallic material.
The plane of the spool 7 of suction valve contacts with second chamber P2 of inlet valve seat 2 and the ingress of the 4th chamber P4 respectively, and the exterior edge face of ingress is respectively equipped with the convexity of an annular, makes spool 7 and ingress form the annular wire sealing.The plane of the spool 7 of outlet valve contacts with the 3rd chamber P3 of delivery valve seat 6 and the interior edge face in the outlet port of the 5th chamber P5 respectively, and the interior edge face in outlet port is respectively equipped with the convexity of an annular, makes spool 7 and outlet port form the annular wire sealing.
The afterbody of the valve rod 5 of two outlet valves in the delivery valve seat 6 is provided with valve pad 4 and exhaust gas drive plate 3.The little round platform of valve rod 5 afterbodys penetrates the center of valve pad 4, and the stepped shape periphery of valve pad 4 places the center of exhaust gas drive plate 3.Valve rod 5, valve pad 4 and exhaust gas drive plate 3 are radial interference fit, are fixed together.Exhaust gas drive plate 3 contacts with exhaust diaphragm 18, and two exhaust gas drive plates 3 correspond respectively to the second chamber P2 and the acting surface of the 4th chamber P4 on exhaust diaphragm 18 of two inlet valve seats 2.
The afterbody of the valve rod 5 of the suction valve in two inlet valve seats 2 is provided with valve pad 4 and air inlet driving plate 15.The afterbody of valve rod 5 penetrates the center of valve pad 4, and the stepped shape periphery of valve pad 4 places the center of air inlet driving plate 15.Valve rod 5, valve pad 4 and air inlet driving plate 15 are radial interference fit, are fixed together.Air inlet driving plate 15 contacts with air inlet diaphragm 17, corresponding to the acting surface of back pressure cavity on air inlet diaphragm 17 in 1 in the end cap.
Two ends in the first chamber P1 of delivery valve seat 6 are respectively arranged with volute spring 16, and this volute spring 16 passes exhaust diaphragm 18, withstand on spool skeleton 8 outsides of suction valve in two inlet valve seats 2 respectively, moving axially when acting on the suction valve partition.
The position, hole of the 3rd chamber P3 of corresponding delivery valve seat 6 and the 5th chamber P5 in the inlet valve seat 2; Be respectively arranged with cylindrical spring 9; This cylindrical spring 9 passes exhaust diaphragm 18 and gets into the 3rd chamber P3 and the 5th chamber P5; Withstand on spool skeleton 8 outsides of delivery valve seat 6 interior two outlet valves respectively, moving axially when acting on the outlet valve partition.
In inlet valve seat 2, passage the 4th chamber P4 interior and inlet valve seat 2 that the second chamber P2 of inlet valve seat 2 leads to the 5th chamber P5 of delivery valve seat 6 leads in the passage of delivery valve seat 6 the 3rd chamber P3, respectively is provided with one-way valve.Control the unidirectional conducting of the second chamber P2 respectively, or the 4th chamber P4 is to the unidirectional conducting of the 3rd chamber P3 to the 5th chamber P5.This one-way valve comprises valve pocket 10, pressure spring 11, " O " shape seal ring 12 and ball sealer 13.Through 12 sealings of " O " shape seal ring, ball sealer 13 is withstood by the pressure spring 11 in the valve pocket 10 between valve pocket 10 and the inlet valve seat 2.Ball sealer 13 fully contacts with sealing surface outside the 4th chamber P4 outlet port with the second chamber P2 respectively, forms linear sealing.The ball sealer 13 general rubber materials that adopt.
This converting unit is a kind of piezo electric valve formula I/P converting unit, is used for intelligent valve positioner.After this converting unit is installed on the complete machine, connect source of the gas and power supply, pressurized air gets into the first chamber P1 and acts on two suction valves.At this moment under the acting in conjunction of volute spring 16 and bleed pressure, two suction valves are sealed in the ingress of the second chamber P2 and the 4th chamber P2 respectively, and promptly the first chamber P1 and the second chamber P2 cut off, and the first chamber P1 and the 4th chamber P2 cut off.Under the effect of cylindrical spring 9, two outlet valves are sealed in the outlet port of the 3rd chamber P3 and the 5th chamber P5 respectively, and promptly the 3rd chamber P3 and the 5th chamber P5 all cut off with relief opening EX.Simultaneously, under the effect of pressure spring 11, two one-way valves all seal, and promptly the second chamber P2 and the 5th chamber P5 cut off, and the 3rd chamber P3 and the 4th chamber P4 cut off, and be as shown in Figure 1.
If, make the 14 beginning air inlets of the piezo electric valve in the left side end cap 1 among the figure through control impuls, enough force left side air inlet diaphragms 17 are arranged in left side end cap 1 back pressure cavity.Through moving axially of the suction valve in the air inlet driving plate 15 driving left side inlet valve seats 2; The elastic force, surface friction drag and the bleed pressure that overcome volute spring 16 move axially motion to the right; Open the inlet of the second chamber P2 in the left side inlet valve seat 2; The outer end of the left side section of valve rod 4 and the valve opening between the inlet valve seat 2 is closed by the valve pad 4 in the air inlet driving plate 15 simultaneously; Pressurized air gets into the second chamber P2, and the elastic force that overcomes pressure spring power 11 is pushed ball sealer 13 open then got into the 5th chamber P5 of delivery valve seat 6.At this moment, the 5th chamber P5 and relief opening EX remain on the partition state, and pressurized air arrives specified position through the second delivery outlet OUT2 pushing executing mechanism, and is as shown in Figure 2.
Meanwhile, get into the pressurized air of the second chamber P2, promote left side exhaust diaphragm 18; Drive moving axially of delivery valve seats 6 internal upper part outlet valves through exhaust gas drive plate 3, the resistances such as elastic force, friction that overcome cylindrical spring 9 move right, and open relief opening EX; This moment, the 3rd chamber P3 and the 4th chamber P4 kept the partition state; Delivery outlet OUT1 is communicated with relief opening EX, lays down the pressure of the 3rd chamber P3, and the pressure of the 3rd chamber P3 is equal to or slightly greater than external atmosphere pressure P0.
In like manner; When the piezo electric valve 14 beginning air inlets that make through control impuls in figure right-of-center in political views's side end cap 1, the side piezo electric valve 14 beginning exhausts in this moment left end cap 1, the sealing that under the effect of pressure spring 11, resets of the one-way valves in the left side inlet valve seat 2; The left side back pressure cavity internal air pressure and the second chamber bleed pressure P2 equal external atmosphere pressure P0; Enough force right side air inlet diaphragms 17 are arranged in right side end cap 1 back pressure cavity,, overcome volute spring 16 resistances such as grade to left movement through moving axially of the suction valve in the air inlet driving plate 15 driving right side inlet valve seats 2; Open the inlet of the 4th chamber P4 in the right side inlet valve seat 2; The gas port of right-hand member is closed by valve pad 4 simultaneously, and pressurized air gets into the 4th chamber P4, and the elastic force that overcomes pressure spring power 11 is pushed ball sealer 13 open then entering the 3rd chamber P3.This moment is by the gas pressure acting in conjunction in cylindrical spring 9 and the 3rd chamber P3; Make the exhaust valve closure on delivery valve seat 6 tops; Promptly the 3rd chamber P3 and relief opening EX cut off, and pressurized air arrives specified position through delivery outlet OUT1 pushing executing mechanism, and is as shown in Figure 3.
Meanwhile; The 4th chamber P4 pressurized air promotes right side exhaust diaphragm 18, and the outlet valve that drives bottoms in the delivery valve seats 6 through exhaust gas drive plate 3 moves axially, and the resistances such as elastic force, friction that overcome cylindrical spring 9 are to left movement; Open the relief opening EX of bottom; Delivery outlet OUT2 is communicated with relief opening EX, lays down the pressure of the second chamber P2, and the pressure of the second chamber P3 is equal to or slightly greater than external atmosphere pressure P0.
The present invention is used for the double-action converting unit of valve positioner; Outage, die and the situation of break signal under, the 3rd chamber P3 that is connected with the first delivery outlet OUT1 is connected the 5th chamber P5 with the second delivery outlet OUT2; Respectively because of the effect of the pressure spring 11 of cylindrical spring of outlet valve 9 and one-way valve; Become the cavity of sealing, realized that the position of actuator remains unchanged, thereby had failure protection function.
Claims (10)
1. be used for the double-action converting unit of valve positioner, it is characterized in that, said converting unit comprises: a board-like delivery valve seat (6); Two board-like inlet valve seats (2); The end cap (1) of two built-in piezo electric valves (14), two air inlet diaphragms (17), two exhaust diaphragms (18);
Said converting unit is a symplex structure, and end cap (1), air inlet diaphragm (17), inlet valve seat (2), exhaust diaphragm (18), delivery valve seat (6), exhaust diaphragm (18), inlet valve seat (2), air inlet diaphragm (17), end cap (1) stack gradually arrangement;
Be respectively arranged with on said two inlet valve seats (2) and control the suction valve that source of the gas is communicated with first delivery outlet (OUT1) or second delivery outlet (OUT2); Said delivery valve seat (6) is provided with the outlet valve that control first delivery outlet (OUT1) or second delivery outlet (OUT2) are communicated with relief opening (EX) respectively.
2. double-action converting unit as claimed in claim 1 is characterized in that: said delivery valve seat (6) is provided with first chamber (P1) that connects suction port (IN), and said first chamber (P1) is communicated to the plate face of two parallel symmetries of delivery valve seat (6);
Said delivery valve seat (6) is provided with the 3rd chamber (P3) that connects first delivery outlet (OUT1), connects the 5th chamber (P5) of second delivery outlet (OUT2); Said the 3rd chamber (P3) and the 5th chamber (P5) inversion symmetry are communicated to a plate face of delivery valve seat (6) respectively;
Be provided with the outlet valve of two inversion symmetry in the said delivery valve seat (6), the axis normal of this outlet valve is in the plate face of delivery valve seat (6); Moving axially of outlet valve, control respectively the 3rd chamber (P3) and the 5th chamber (P5) separately with delivery valve seat (6) on the conducting or the partition of relief opening (EX).
3. double-action converting unit as claimed in claim 2; It is characterized in that: be respectively arranged with second chamber (P2) and the 4th chamber (P4) on said two inlet valve seats (2); Said second chamber (P2) and the 4th chamber (P4) are communicated to a plate face of inlet valve seat (2) respectively, and chamber pressure acts on respectively on the exhaust diaphragm (18);
The axis normal of the suction valve in the said inlet valve seat (2) is in the plate face of inlet valve seat (2); Moving axially of suction valve, control respectively second chamber (P2) or the 4th chamber (P4) separately with the conducting or the partition of first chamber (P1) of delivery valve seat (6);
Said inlet valve seat (2) is provided with one-way valve, and said one-way valve is respectively applied for the unidirectional conducting of second chamber (P2) to the 5th chamber (P5) of delivery valve seat (6), or the 4th chamber (P4) is to the unidirectional conducting of the 3rd chamber (P3) of delivery valve seat (6).
4. double-action converting unit as claimed in claim 3; It is characterized in that: be provided with the back pressure cavity that acts on the air inlet diaphragm (17) in the said end cap (1); The Pneumatic pipe cleaner of said back pressure cavity is crossed the control of piezo electric valve (14), promotes air inlet diaphragm (17) and drives moving axially of suction valve.
5. double-action converting unit as claimed in claim 4 is characterized in that: the control that the Pneumatic pipe cleaner in said second chamber (P2) or the 4th chamber (P4) is crossed suction valve promotes exhaust diaphragm (18) respectively and drives moving axially of outlet valve conducting.
6. double-action converting unit as claimed in claim 5 is characterized in that: said suction valve and outlet valve include valve rod (5), spool (7) and spool skeleton (8);
The periphery of said spool (7) and top place in the spool skeleton (8), and the end of valve rod (5) penetrates the center of spool (7); The outer installment of said spool skeleton (8) has spring, acts on moving axially of suction valve or outlet valve partition.
7. double-action converting unit as claimed in claim 6; It is characterized in that: the valve rod of said outlet valve (5) afterbody is provided with valve pad (4) and exhaust gas drive plate (3); The afterbody of valve rod (5) penetrates the center of valve pad (4), and the stepped shape periphery of valve pad (4) places the center of exhaust gas drive plate (3); Said exhaust gas drive plate (3) contacts with exhaust diaphragm (18), corresponds respectively to second chamber (P2) and the acting surface of the 4th chamber (P4) on exhaust diaphragm (18) of two inlet valve seats (2);
The valve rod of said suction valve (5) afterbody is provided with valve pad (4) and air inlet driving plate (15), and the afterbody of valve rod (5) penetrates the center of valve pad (4), and the stepped shape periphery of valve pad (4) places the center of air inlet driving plate (15); Said air inlet driving plate (15) contacts with air inlet diaphragm (17), corresponding to the acting surface of back pressure cavity on air inlet diaphragm (17) in the end cap (1).
8. double-action converting unit as claimed in claim 6 is characterized in that: the ingress of said second chamber (P2) or the 4th chamber (P4) and the exterior edge face that spool (7) contacts are respectively equipped with an annular protrusion;
The outlet port of said the 3rd chamber (P3) and the 5th chamber (P5) and the interior edge face that spool (7) contacts are respectively equipped with an annular protrusion.
9. double-action converting unit as claimed in claim 6 is characterized in that: said one-way valve comprises valve pocket (10), pressure spring (11) and ball sealer (13); Ball sealer (13) is withstood on the sealing surface outside the second chamber P2 or the 4th chamber P4 outlet by the pressure spring (11) in the valve pocket (10).
10. double-action converting unit as claimed in claim 9 is characterized in that: the material of said spool (7) is a rubber; The material of said ball sealer (13) is a rubber; Said spool skeleton (8) is a metallic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210092242.9A CN102620025B (en) | 2012-03-31 | 2012-03-31 | For the double-action converting unit of valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210092242.9A CN102620025B (en) | 2012-03-31 | 2012-03-31 | For the double-action converting unit of valve positioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102620025A true CN102620025A (en) | 2012-08-01 |
| CN102620025B CN102620025B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210092242.9A Expired - Fee Related CN102620025B (en) | 2012-03-31 | 2012-03-31 | For the double-action converting unit of valve positioner |
Country Status (1)
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| CN (1) | CN102620025B (en) |
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| CN102943897A (en) * | 2012-10-18 | 2013-02-27 | 华中科技大学 | Pneumatic diaphragm type automatic pressure-difference reversing valve |
| CN103216664A (en) * | 2013-04-24 | 2013-07-24 | 玖龙纸业（太仓）有限公司 | Intelligent valve locator |
| CN108561593A (en) * | 2018-07-30 | 2018-09-21 | 辰星仪表（成都）有限公司 | Pneumatic relay |
| CN109466267A (en) * | 2018-12-04 | 2019-03-15 | 广东机电职业技术学院 | Vehicular air bag height adjustment device |
| CN112728118A (en) * | 2020-12-25 | 2021-04-30 | 天津信望爱科技有限公司 | Magnetic control valve |
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| CN103216664B (en) * | 2013-04-24 | 2015-05-27 | 玖龙纸业（太仓）有限公司 | Intelligent valve locator |
| CN108561593A (en) * | 2018-07-30 | 2018-09-21 | 辰星仪表（成都）有限公司 | Pneumatic relay |
| CN109466267A (en) * | 2018-12-04 | 2019-03-15 | 广东机电职业技术学院 | Vehicular air bag height adjustment device |
| CN109466267B (en) * | 2018-12-04 | 2023-10-20 | 广东机电职业技术学院 | Vehicle air bag height adjusting device |
| CN112728118A (en) * | 2020-12-25 | 2021-04-30 | 天津信望爱科技有限公司 | Magnetic control valve |
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|---|---|
| CN102620025B (en) | 2016-04-20 |
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