CN102620025B - For the double-action converting unit of valve positioner - Google Patents
For the double-action converting unit of valve positioner Download PDFInfo
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- CN102620025B CN102620025B CN201210092242.9A CN201210092242A CN102620025B CN 102620025 B CN102620025 B CN 102620025B CN 201210092242 A CN201210092242 A CN 201210092242A CN 102620025 B CN102620025 B CN 102620025B
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Abstract
The invention provides the simply subbase mounted double-action converting unit for valve positioner of a kind of structure.Delivery valve seat and inlet valve seat are plank frame, stacked installation, and the axis of suction valve, outlet valve is all vertical with the plate face of valve seat.Unitary construction is simple, and machining cost is low, and parts assembling easily.Rubber spool for sealing rides in metal frame, and its rigidity is enhanced; And rubber is directly not stressed in spring, therefore spool is not yielding, can ensure the sealing effect of Long-Time Service, can also improve effective working pressure simultaneously.Because the annular protrusion of the seal face of rubber spool and valve seat forms linear sealing, the reliability of sealing is also improved.
Description
Technical field
The present invention relates to automatic control technology field, especially relate to the I/P converting unit of valve positioner.
Background technique
Along with function perfect of intelligent valve positioner, the I/P converting unit of original employing electromagnetic coil mode can not meet 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 solenoid controlled requirement.
In the controls, if the source of the gas of I/P converting unit inputs, delivery outlet has leakage, valve will be caused to locate constantly vibration, cause the instability of fed sheet of a media in pilot line, affect the quality of product or cause danger.Therefore, piezoelectricity valve type I/P converting unit source of the gas input, delivery outlet must ensure reliable sealability.
But the partition between the chamber of existing piezoelectricity valve type I/P converting unit and chamber, normally directly withstands rubber valve core by spring or rubber gasket contacts with valve seat, form the object that sealing surface reaches sealing.
This structure has the following disadvantages:
1, rubber spool and rubber gasket are for a long time by spring force, easily produce distortion, affect sealing effect;
2, because the rigidity of rubber spool is not easily held, the further raising of product work pressure is limited;
3, owing to adopting face sealing, higher to the quality requirement on sealing surface surface;
4, when the pressure of chamber is lower, leaking easily appears in sealing place;
5, higher to the requirement of holddown spring, spring force is too large, and not easily open during unlatching, spring force is too little, easily leaks again during partition.
In addition, the complex structure of existing converting unit, processing and assembling difficulty larger.
Owing to there is above-mentioned deficiency, therefore, need to be further improved the I/P converting unit of valve positioner, simplify the structure of converting unit, overcome spool rigidity in converting unit inadequate simultaneously, hold yielding deficiency, improve the sealing reliability of source of the gas input, delivery outlet.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides the simple subbase mounted converting unit of a kind of structure, for intelligent valve positioner.
The present invention is for solving the problems of the technologies described above, rely on following technical proposals to realize: for the double-action converting unit of 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 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.Two inlet valve seats are respectively arranged with the suction valve controlling source of the gas and be communicated with the first delivery outlet or the second delivery outlet; Delivery valve seat is provided with the outlet valve controlling the first delivery outlet or the second delivery outlet connection relief opening respectively.
Wherein, delivery valve seat is provided with the first chamber connecting suction port, the first chamber is to the plate face of two Parallel Symmetrics of delivery valve seat; Delivery valve seat is provided with the 3rd chamber of connection first delivery outlet, connects the 5th chamber of the second delivery outlet; 3rd chamber and the 5th chamber inversion symmetry, be communicated to a plate face of delivery valve seat respectively.Be provided with the outlet valve of two inversion symmetry in delivery valve seat, the axes normal of outlet valve is in the plate face of delivery valve seat; Moving axially of outlet valve, controls conducting or the partition of the 3rd chamber and the relief opening of the 5th chamber separately and on delivery valve seat respectively.
Wherein, two inlet valve seats are respectively arranged with the second chamber and the 4th chamber, the second chamber and the 4th chamber are communicated to a plate face of inlet valve seat respectively, and chamber pressure acts on exhaust diaphragm respectively.The axes normal of the suction valve in inlet valve seat is in the plate face of inlet valve seat; Moving axially of suction valve, control respectively the second chamber or the 4th chamber separately with conducting or the partition of the first chamber of delivery valve seat.Inlet valve seat is provided with one-way valve, and this one-way valve is respectively used to the one-way conduction of the second chamber to the 5th chamber of delivery valve seat, or the 4th chamber is to the one-way conduction of the 3rd chamber of delivery valve seat.
Wherein, be provided with the back pressure cavity acted on air inlet diaphragm in end cap, the air pressure of this back pressure cavity, by the control of piezo electric valve, promotes air inlet diaphragm and drives moving axially of suction valve conducting.Air pressure in second chamber or the 4th chamber, by the control of suction valve, promotes 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 are placed in spool skeleton, and the end of valve rod penetrates the center of spool; The outer installment of spool skeleton has spring, and what act on that suction valve or outlet valve cut off moves axially.
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 is placed in the center of exhaust gas drive plate; Exhaust gas drive plate and exhaust film contact, correspond respectively to the second chamber and the acting surface of the 4th chamber on 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 is placed in the center of air inlet driving plate; Air inlet driving plate and air inlet film contact, corresponding to the acting surface of the back pressure cavity in end cap on air inlet diaphragm.
Further, the exterior edge face that the ingress of the second chamber or the 4th chamber contacts with spool, is respectively equipped with an annular protrusion; The interior edge face that 3rd chamber contacts with spool with the outlet port of the 5th chamber, is respectively equipped with an annular protrusion.
Further, one-way valve comprises valve pocket, Compress 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 Compress Spring in valve pocket.
Further, the material of spool is rubber; The material of ball sealer is rubber; Spool skeleton is metallic material.
Compared with prior art, the advantage of technological scheme of the present invention is adopted to be:
1. delivery valve seat and inlet valve seat are plank frame, stacked installation, and the axis of suction valve, outlet valve is all vertical with the plate face of valve seat.Therefore unitary construction is simple, machining cost is low, and easily, the up-to-standard rate of product is high in parts assembling.
2. spool skeleton is metal frame, and ride in metal frame for the rubber spool sealed, its rigidity is enhanced; And rubber is directly not stressed in spring, therefore spool is not yielding, can ensure the sealing effect of Long-Time Service, 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 is also improved.
4. the one-way valve in inlet valve seat, the linear sealing that the rubber seal ball withstood by Compress Spring and cavity are formed, reliability is also improved.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for the double-action converting unit of valve positioner.
Fig. 2 is the schematic diagram of the present invention for the double-action converting unit one direction effect of valve positioner.
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 described in detail.
The present invention is used for the double-action converting unit of valve positioner, comprises 17, two, end cap 1, two air inlet diaphragms exhaust diaphragm 18 of a board-like delivery valve seat 6, two board-like inlet valve seats 2, two built-in piezo electric valves 14.
See the embodiment of accompanying drawing 1 converting unit, can see in 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.Be connected by screw between them, be fixed together.
Be provided with back pressure cavity in end cap 1, and be provided with piezo electric valve 14, the air pressure of back pressure cavity passes through the control of piezo electric valve 14.Piezo electric valve 14 acts on the one side of air inlet diaphragm 17 at the pressure that back pressure cavity produces, and air inlet diaphragm 17 another side contacts with the air inlet driving plate 15 assembled in inlet valve seat 2.
Board-like delivery valve seat 6 is provided with the first chamber P1 connecting suction port IN, the first chamber P1 runs through the plate face of two Parallel Symmetrics being communicated to delivery valve seat 6.Delivery valve seat 6 is also provided with the 3rd chamber P3 be connected with the first delivery outlet OUT1 respectively, is 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 on a plate face of delivery valve seat 6 respectively.The rear of the 3rd chamber P3 and the 5th chamber P5 on delivery valve seat 6, the also open to atmosphere relief opening EX of the company of being provided with.
Two inlet valve seats 2 are respectively arranged with the second chamber P2 or the 4th chamber P4, the second chamber P2 and the 4th chamber P4 are communicated to the plate face that two inlet valve seats 2 contact with exhaust diaphragm 18 respectively, and the air pressure in chamber acts on two exhaust diaphragms 18 respectively.
The two-port of the first chamber P1 of delivery valve seat 6, respectively towards the 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 second chamber P2 and the ingress of the 4th chamber P3, be respectively arranged with suction valve.The axes 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 leads to the outlet port of relief opening EX respectively, is respectively arranged with the outlet valve of inversion symmetry.The axes normal of outlet valve is in the plate face of board-like delivery valve seat 6; Moving axially of outlet valve, controls conducting or the partition of the relief opening EX of the 3rd chamber P3 and the 5th chamber P5 separately and on delivery valve seat 6 respectively.
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 end penetrates the center of spool 7, and the periphery of spool 7 and top are placed in spool skeleton 8.Valve rod 5, spool 7 and spool skeleton 8 radially interference fit, be fixed together.The material of spool 7 generally selects rubber, and spool skeleton 8 is metallic material.
The plane of the spool 7 of suction valve contacts with the ingress of the 4th chamber P4 with the second chamber P2 of inlet valve seat 2 respectively, and the exterior edge face of ingress, is respectively equipped with the projection of an annular, makes spool 7 and ingress form annular wire and seals.The plane of the spool 7 of outlet valve contacts with the interior edge face in the outlet port of the 5th chamber P5 with the 3rd chamber P3 of delivery valve seat 6 respectively, and the interior edge face in outlet port, is respectively equipped with the projection of an annular, makes spool 7 and outlet port form annular wire and seals.
The afterbody of the valve rod 5 of two outlet valves in delivery valve seat 6, is provided with valve pad 4 and exhaust gas drive plate 3.The little round platform of valve rod 5 afterbody penetrates the center of valve pad 4, and the stepped shape periphery of valve pad 4 is placed in the center of exhaust gas drive plate 3.Valve rod 5, valve pad 4 and exhaust gas drive plate 3 radially interference fit, be 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 is placed in the center of air inlet driving plate 15.Valve rod 5, valve pad 4 and air inlet driving plate 15 radially interference fit, be 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 end cap in 1.
Two ends in first chamber P1 of delivery valve seat 6 are respectively arranged with volute spring 16, and this volute spring 16 is through exhaust diaphragm 18, and the spool skeleton 8 withstanding on suction valve in two inlet valve seats 2 is respectively outside, acts on moving axially when suction valve cuts off.
3rd chamber P3 of corresponding delivery valve seat 6 and the position, hole of the 5th chamber P5 in inlet valve seat 2, be respectively arranged with cylindrical spring 9, this cylindrical spring 9 enters the 3rd chamber P3 and the 5th chamber P5 through exhaust diaphragm 18, the spool skeleton 8 withstanding on interior two outlet valves of delivery valve seat 6 is respectively outside, acts on moving axially when outlet valve cuts off.
In inlet valve seat 2, in the passage that the second chamber P2 of inlet valve seat 2 leads to the 5th chamber P5 of delivery valve seat 6 and the 4th chamber P4 of inlet valve seat 2 lead in the passage of delivery valve seat 6 the 3rd chamber P3, be respectively provided with one-way valve.Control the one-way conduction of the second chamber P2 to the 5th chamber P5 respectively, or the 4th chamber P4 is to the one-way conduction of the 3rd chamber P3.This one-way valve comprises valve pocket 10, Compress Spring 11, " O " shape seal ring 12 and ball sealer 13.Sealed by " O " shape seal ring 12 between valve pocket 10 and inlet valve seat 2, ball sealer 13 is withstood by the Compress Spring 11 in valve pocket 10.Ball sealer 13 fully contacts with the sealing surface outside the 4th chamber P4 outlet port with the second chamber P2 respectively, forms linear sealing.Ball sealer 13 generally adopts rubber material.
This converting unit is a kind of piezoelectricity valve type I/P converting unit, for intelligent valve positioner.When this converting unit is arranged on after on complete machine, connect source of the gas and power supply, pressurized air enters 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 namely the first chamber P1 and the second chamber P2 cuts off, and the first chamber P1 and the 4th chamber P2 cuts 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 namely the 3rd chamber P3 and the 5th chamber P5 all cuts off with relief opening EX.Meanwhile, under the effect of Compress Spring 11, two one-way valves all seal, and namely the second chamber P2 and the 5th chamber P5 cuts off, and the 3rd chamber P3 and the 4th chamber P4 cuts off, as shown in Figure 1.
If make the piezo electric valve 14 in figure in the end cap 1 of left side start air inlet by control impuls, enough pressure in left side end cap 1 back pressure cavity, is had to promote left side air inlet diaphragm 17.Moving axially of the suction valve in the inlet valve seat 2 of left side is driven by air inlet driving plate 15, overcome the elastic force of volute spring 16, surface friction drag and bleed pressure and move axially motion to the right, the entrance of the second chamber P2 in left side inlet valve seat 2 is opened, the outer end of the valve opening simultaneously between left section of valve rod 4 and inlet valve seat 2 is closed by the valve pad 4 in air inlet driving plate 15, pressurized air enters the second chamber P2, and the elastic force overcoming compression spring force 11 is pushed ball sealer 13 open then entered the 5th chamber P5 of delivery valve seat 6.Now, the 5th chamber P5 and relief opening EX remains on partition state, and pressurized air arrives specified position by the second delivery outlet OUT2 pushing executing mechanism, as shown in Figure 2.
Meanwhile, enter the pressurized air of the second chamber P2, promote left side exhaust diaphragm 18, drive moving axially of delivery valve seat 6 internal upper part outlet valve by exhaust gas drive plate 3, overcome the resistances such as the elastic force of cylindrical spring 9, friction and move right, relief opening EX is opened, now the 3rd chamber P3 and the 4th chamber P4 keeps 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, air inlet is started when being made the piezo electric valve 14 in figure in the end cap 1 of right side by control impuls, side piezo electric valve 14 now in left end cap 1 starts exhaust, one-way valve in the inlet valve seat 2 of left side resets sealing under the effect of Compress Spring 11, left side back pressure cavity internal air pressure and the second chamber bleed pressure P2 equal external atmosphere pressure P0, enough pressure is had to promote right side air inlet diaphragm 17 in end cap 1 back pressure cavity of right side, moving axially of the suction valve in the inlet valve seat 2 of right side is driven by air inlet driving plate 15, overcome resistance such as volute spring 16 grade to left movement, the entrance of the 4th chamber P4 in right side inlet valve seat 2 is opened, the gas port of right-hand member is closed by valve pad 4 simultaneously, pressurized air enters the 4th chamber P4, the elastic force overcoming compression spring force 11 is pushed ball sealer 13 open then enters the 3rd chamber P3.Now 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 top, namely the 3rd chamber P3 and relief opening EX cuts off, and pressurized air arrives specified position by delivery outlet OUT1 pushing executing mechanism, as shown in Figure 3.
Meanwhile, 4th chamber P4 pressurized air promotes right side exhaust diaphragm 18, the outlet valve of bottom in delivery valve seat 6 is driven to move axially by exhaust gas drive plate 3, overcome the resistances such as the elastic force of cylindrical spring 9, friction to left movement, the relief opening EX of bottom is opened, 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; when power-off, die and break signal; the 3rd chamber P3 be connected with the first delivery outlet OUT1; the 5th chamber P5 is connected with the second delivery outlet OUT2; respectively because of the effect of the cylindrical spring 9 of outlet valve and the Compress Spring 11 of one-way valve; become closed cavity, the position achieving actuator remains unchanged, and thus has failure protection function.
Claims (8)
1. for the double-action converting unit of valve positioner, it is characterized in that, described 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 exhausts diaphragm (18);
Described converting unit is 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;
Described two inlet valve seats (2) are respectively arranged with the suction valve controlling source of the gas and be communicated with the first delivery outlet (OUT1) or the second delivery outlet (OUT2); Described delivery valve seat (6) is provided with the outlet valve that control first delivery outlet (OUT1) or the second delivery outlet (OUT2) are communicated with relief opening (EX) respectively;
Described delivery valve seat (6) is provided with the first chamber (P1) connecting suction port (IN), described first chamber (P1) is communicated to the plate face of two Parallel Symmetrics of delivery valve seat (6);
Described delivery valve seat (6) is provided with the 3rd chamber (P3) of connection first delivery outlet (OUT1), connects the 5th chamber (P5) of the second delivery outlet (OUT2); Described 3rd chamber (P3) and the 5th chamber (P5) inversion symmetry, be communicated to a plate face of delivery valve seat (6) respectively;
Be provided with the outlet valve of two inversion symmetry in described delivery valve seat (6), the axes normal of this outlet valve is in the plate face of delivery valve seat (6); Moving axially of outlet valve, controls conducting or the partition of the 3rd chamber (P3) and the relief opening (EX) of the 5th chamber (P5) separately and on delivery valve seat (6) respectively;
Described two inlet valve seats (2) are respectively arranged with the second chamber (P2) and the 4th chamber (P4), described second chamber (P2) and the 4th chamber (P4) are communicated to a plate face of inlet valve seat (2) respectively, and chamber pressure acts in exhaust diaphragm (18) respectively;
The axes normal of the suction valve in described inlet valve seat (2) is in the plate face of inlet valve seat (2); Moving axially of suction valve, controls the second chamber (P2) or the 4th chamber (P4) separately and the conducting of first chamber (P1) of delivery valve seat (6) or partition respectively;
(2) are provided with one-way valve to described inlet valve seat, described one-way valve is respectively used to the one-way conduction of the second chamber (P2) to the 5th chamber (P5) of delivery valve seat (6), or the 4th chamber (P4) is to the one-way conduction of the 3rd chamber (P3) of delivery valve seat (6).
2. double-action converting unit as claimed in claim 1, it is characterized in that: in described end cap (1), be provided with the back pressure cavity acted on air inlet diaphragm (17), the air pressure of described back pressure cavity, by the control of piezo electric valve (14), promotes air inlet diaphragm (17) and drives moving axially of suction valve.
3. double-action converting unit as claimed in claim 2, it is characterized in that: the air pressure in described second chamber (P2) or the 4th chamber (P4), by the control of suction valve, promotes exhaust diaphragm (18) respectively and drives moving axially of outlet valve conducting.
4. double-action converting unit as claimed in claim 3, is characterized in that: described suction valve and outlet valve include valve rod (5), spool (7) and spool skeleton (8);
The periphery of described spool (7) and top are placed in spool skeleton (8), and the end of valve rod (5) penetrates the center of spool (7); The outer installment of described spool skeleton (8) has spring, and what act on that suction valve or outlet valve cut off moves axially.
5. double-action converting unit as claimed in claim 4, it is characterized in that: valve rod (5) afterbody of described outlet valve 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) is placed in the center of exhaust gas drive plate (3); Described exhaust gas drive plate (3) contacts with exhaust diaphragm (18), corresponds respectively to the second chamber (P2) and the acting surface of the 4th chamber (P4) in exhaust diaphragm (18) of two inlet valve seats (2);
Valve rod (5) afterbody of described suction valve 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) is placed in the center of air inlet driving plate (15); Described air inlet driving plate (15) contacts with air inlet diaphragm (17), corresponding to the acting surface of the back pressure cavity in end cap (1) on air inlet diaphragm (17).
6. double-action converting unit as claimed in claim 4, is characterized in that: the exterior edge face that the ingress of described second chamber (P2) or the 4th chamber (P4) contacts with spool (7), is respectively equipped with an annular protrusion;
The interior edge face that described 3rd chamber (P3) contacts with spool (7) with the outlet port of the 5th chamber (P5), is respectively equipped with an annular protrusion.
7. double-action converting unit as claimed in claim 4, is characterized in that: described one-way valve comprises valve pocket (10), Compress Spring (11) and ball sealer (13); Ball sealer (13) is withstood on the sealing surface outside the second chamber (P2) or the outlet of the 4th chamber (P4) by the Compress Spring (11) in valve pocket (10).
8. double-action converting unit as claimed in claim 7, is characterized in that: the material of described spool (7) is rubber; The material of described ball sealer (13) is rubber; Described spool skeleton (8) is 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 |
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| Publication Number | Publication Date |
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| CN102620025A CN102620025A (en) | 2012-08-01 |
| CN102620025B true CN102620025B (en) | 2016-04-20 |
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| CN201210092242.9A Expired - Fee Related CN102620025B (en) | 2012-03-31 | 2012-03-31 | For the double-action converting unit of valve positioner |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943897B (en) * | 2012-10-18 | 2014-05-07 | 华中科技大学 | Pneumatic diaphragm type automatic pressure-difference reversing valve |
| 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 |
| CN109466267B (en) * | 2018-12-04 | 2023-10-20 | 广东机电职业技术学院 | Vehicle air bag height adjusting device |
| CN112728118B (en) * | 2020-12-25 | 2022-07-15 | 天津信望爱科技有限公司 | Magnetic control valve |
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|---|---|---|---|---|
| CN1920723A (en) * | 2005-08-23 | 2007-02-28 | 费斯托合资公司 | Fluid operated position regulator |
| CN101275679A (en) * | 2007-03-28 | 2008-10-01 | 株式会社永泰 | Pilot valve unit for actuator control |
| CN101650555A (en) * | 2009-09-03 | 2010-02-17 | 浙江大学 | Intelligent electric valve positioner |
| CN101763121A (en) * | 2008-01-31 | 2010-06-30 | 浙江大学 | Positioning method for digital electric valve |
| CN101776159A (en) * | 2009-01-14 | 2010-07-14 | 胡玉成 | Reversing valve for low power piezoceramics |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010042836A1 (en) * | 2008-10-09 | 2010-04-15 | Watts Water Technologies, Inc. | Shut off valve for a reverse osmosis water filtration system |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920723A (en) * | 2005-08-23 | 2007-02-28 | 费斯托合资公司 | Fluid operated position regulator |
| CN101275679A (en) * | 2007-03-28 | 2008-10-01 | 株式会社永泰 | Pilot valve unit for actuator control |
| CN101763121A (en) * | 2008-01-31 | 2010-06-30 | 浙江大学 | Positioning method for digital electric valve |
| CN101776159A (en) * | 2009-01-14 | 2010-07-14 | 胡玉成 | Reversing valve for low power piezoceramics |
| CN101650555A (en) * | 2009-09-03 | 2010-02-17 | 浙江大学 | Intelligent electric valve positioner |
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| CN102620025A (en) | 2012-08-01 |
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