CN102943897A - Pneumatic diaphragm type automatic pressure-difference reversing valve - Google Patents
Pneumatic diaphragm type automatic pressure-difference reversing valve Download PDFInfo
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- CN102943897A CN102943897A CN2012103988926A CN201210398892A CN102943897A CN 102943897 A CN102943897 A CN 102943897A CN 2012103988926 A CN2012103988926 A CN 2012103988926A CN 201210398892 A CN201210398892 A CN 201210398892A CN 102943897 A CN102943897 A CN 102943897A
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Abstract
The invention discloses a pneumatic diaphragm type automatic pressure-difference reversing valve, comprising a valve body, wherein two end caps are respectively connected with two ends of the valve body axially to form two cavities; two diaphragm components are respectively positioned in the two cavities and divides the two cavities into small end cap cavities and small valve body cavities respectively; the small end cap cavities are respectively communicated with a second gas port and a third gas port; two hollow sealing pipes are axially arranged in the two end caps respectively; a valve core connecting rod is positioned in a valve body through hole; two ends of the valve core connecting rod are respectively connected with the two diaphragm components to form a valve core; and under the action of pressure difference of the two diaphragm components, the valve core axially reciprocates in the valve body, so as to alternatively conduct end surface sealing and opening on the two sealing pipes and the two ends of the valve body through hole. By virtue of the end surface sealing manner, the dust influences less, and the valve core is not caused to be blocked. The valve core is supported by the diaphragms, so that the motion of the valve core is more flexible. The automatic pressure-difference reversing manner is adopted, thus the pilot control reversing of the electromagnetic valve is not needed, and the reversing valve can be applied to limited power and explosion proof situations.
Description
Technical field
The present invention relates to a kind of selector valve for pneumatic system, relate in particular to a kind of diaphragm type pressure reduction automatic diverter valve for pneumatic system reciprocatory motion executive component.
Background technique
At present, existing reversing arrangement for pneumatic system adopts electromagnetic pilot selector valve and stroke pilot reversing valve mostly, and change-over valve core adopts the mode of guiding valve mostly, method by magnet control or pilot slide valve, so that reciprocating type executive component drives the valve core of main valve commutation when moving to the stroke end, change gas circuit, finish the working in reciprocating mode of reciprocating type executive component.But the mode of these two kinds of commutations has its certain narrow limitation: much ration the power supply, explosion-proof occasion, the electromagnetic pilot selector valve can not use; Simultaneously guiding valve is higher to the manufacturing required precision, has increased production cost, and commutating frequency is restricted, the response is slower, and guiding valve is higher and need lubrication system lubricated to it to the quality requirement of air in addition, has increased maintenance cost.
Summary of the invention
Can not be used for rationing the power supply in order to overcome electromagnetic pilot selector valve in the existing pneumatic system, explosion-proof occasion and the guiding valve manufacturing is complicated, maintenance cost is high, the deficiency of low-response, the invention provides a kind of diaphragm type pressure reduction automatic diverter valve for pneumatic system.
Diaphragm type pressure reduction automatic diverter valve comprises
A valve body, its inner shaft is to having through hole, and the side has first, second and third gas port, and the first gas port is communicated with valve hole, and the second, three gas port is two active chambers of external executive component respectively;
Two end caps, it joins with the axial two ends of valve body respectively and forms two cavitys;
Two groups of diaphragm units, it lays respectively in two cavitys, and two diaphragm units axially are divided into two cavitys respectively end cap capacitor and valve body capacitor, and wherein the two end cap capacitor is connected with the second, the three gas port respectively;
Two hollow sealing pipes, it is axially disposed within respectively in the two end cap, and an end of two hollow sealing pipes is communicated with respectively corresponding end cap capacitor, and the other end sidewall has air outlet hole;
A spool connecting rod, it is positioned at valve hole, its two ends respectively with the two diaphragm units formation spool that joins;
Under the draught head effect of two diaphragm units, spool carries out axial reciprocating and moves under the valve body interior diaphragm supports, alternately two sealed pipes and valve hole two ends are carried out end face seal and unlatching.
Further, the gas active area of described two diaphragm units is unequal; Two hollow sealing pipes are communicated with an end of end cap capacitor and the through hole two ends in the valve body are equipped with seal ring, and the bore of the seal ring on the valve hole is greater than the bore of end cap upper sealing ring.
Further, described two diaphragm units consist of by two metal intermediate plate clampings, one diaphragm, and the metal intermediate plate gas active area of two diaphragm units is unequal; Be processed with the corresponding ventilation damping hole in position on metal intermediate plate and the diaphragm.
Further, the sealing surface of described metal intermediate plate is provided with rubber gasket.
Further, described diaphragm adopts elastomer diaphragm or canvas filler rubber diaphragm.
Further, connect by pin between the two metal intermediate plates of described diaphragm unit.
Further, screw by screw thread between described sealed pipe and the end cap and connect, and fix by locking nut.
Further, described end cap outer cover has baffler.
Further, be provided with rubber pad between described baffler and the end cap.
Compare with existing pneumatic system selector valve, the present invention has following outstanding advantages:
1, the end face seal form of Pneumatic power diaphragm type pressure reduction automatic diverter valve employing of the present invention is compared with guiding valve, and the impact of dust is less, and can not cause the stuck of spool.
2, the mode of the support of spool employing diaphragm in the Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention is compared with existing guiding valve, and its motion is more flexible.
3, Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention adopts differential automatic reverse mode, need not the pilot control commutation of solenoid valve, can be used in ration the power supply, explosion-proof occasion.
4, the motion mode of spool in valve body is swing under diaphragm supports in the Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention, and simple in structure, the manufacturing required precision is much smaller than guiding valve.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is Pneumatic power diaphragm type pressure reduction automatic diverter valve plan view.
Fig. 2 is diaphragm structure figure, and wherein, Fig. 2 a is front view, and Fig. 2 b is side view.
Fig. 3 is diaphragm metal clip chip architecture figure, and wherein, Fig. 3 a is front elevation, and Fig. 3 b is side view, and Fig. 3 c is rear view.
Fig. 4 is selector valve end face seal structure schematic diagram.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention comprises valve body 1 as shown in Figure 1, and valve body 1 inner shaft is to having through hole, processing gas port P, T1, T2 on the valve body 1. End cap 2,3 screws by circumference uniform distribution are fixed on valve body 1 axial two ends.The axial two ends of valve body are connected to form first and second cavity with two end cap respectively, in two cavitys, be respectively equipped with the first and second diaphragm units 4,5, two diaphragm units and respectively the cavity under it axially be divided into end cap capacitor 401,501 and valve body capacitor 402,502.Two diaphragm unit structures are identical, consist of by two metal intermediate plate clamping diaphragms, can connect by pin between the two metal intermediate plates, circumferentially rotate to prevent the metal clip sheet.Between two diaphragm units by the spool connecting rod 6 that is positioned at the valve inner through hole formation spool that joins.The metal intermediate plate gas active area of the metal intermediate plate gas active area of primary diaphragm assembly and secondary diaphragm assembly does not slightly wait, and generally both differ 3% ~ 4% at outside dimension, and both slightly difference are so that selector valve is realized initial commutation.Diaphragm can adopt elastomer diaphragm or canvas filler rubber diaphragm.Such as Fig. 2, shown in 3, be processed with the corresponding ventilation damping hole 7 in position on metal intermediate plate and the diaphragm, as gas flow.Spool connecting rod 6 ends are connected with diaphragm unit after putting plain washer 8, spring washer 9, and fixing by nut 10.Be axially arranged with respectively the sealed pipe 11,12 of first and second hollow in the two end cap, an end of sealed pipe 11 is communicated with end cap capacitor 401, and the other end sidewall has air outlet hole, and an end of sealed pipe 12 is communicated with end cap capacitor 501, and the other end sidewall has air outlet hole.Two hollow sealing pipes are communicated with an end of end cap capacitor and the through hole two ends in the valve body are equipped with seal ring.The bore d of the seal ring on the valve hole
2Be slightly larger than the bore d of end cap upper sealing ring
1Differ dimensionally about 6 ~ 8% (referring to Fig. 4), like this so that when selector valve cut-in operation executive component, spool can automatic reverse when the executive component cavity internal pressure reaches commutation pressure.Move at gas pressure lower valve core axial reciprocating in valve body, alternately two sealed pipes and valve hole two ends are carried out end face seal and unlatching, specifically: at spool when the first sealed pipe moves, the primary diaphragm assembly is to the first sealed pipe end face seal in the first cavity, simultaneously in the second cavity the secondary diaphragm assembly to the valve hole end face seal; At spool when the second sealed pipe moves, in the second cavity the secondary diaphragm assembly to the second sealed pipe end face seal, simultaneously in the first cavity the primary diaphragm assembly to the valve hole end face seal.The gas port P of valve body is communicated with valve hole, the end cap capacitor in two cavitys respectively with gas port T1, T2 is connected, the first and second air outlets are two active chambers of external executive component respectively.
Sealed pipe 11,12 is threaded with end cap 2,3 and can rotates free adjustment thereon, by locking nut 131,132 lockings, is processed with tool withdrawal groove on the sealed pipe 11,12, is used for placing O RunddichtringO 141,142 and plays seal action.Thread mill drilling on the sealed pipe 11,12, fitted bolt 151,152 is pressed on baffler 161,162 on the end cap.
As optimization, also can at the sealing surface vulcanized rubber sealing gasket (referring to Fig. 3) of metal intermediate plate, there be rubber pad 171,172 to play the effect of damping between end cap and the baffler.
Working procedure of the present invention is specially:
With gas port T1, T2 is two active chambers of external executive component (for example cylinder, pneumatic motor) respectively.Original state, spool is in meta.Gas port P passes into pressurized air, acts on the diaphragm unit 4,5, enters end cap capacitor 401,501 by the damping hole 7 on the diaphragm unit simultaneously, and by baffler 161,162 exhausts.Because wherein the metal intermediate plate diameter of diaphragm unit 4 is slightly larger than the metal intermediate plate diameter of diaphragm unit 5, pretend to be used in and promote spool making a concerted effort above the spool to the direction motion of sealed pipe 11, until the seal ring of the rubber gasket of diaphragm unit 4 and sealed pipe 11 is adjacent to, rubber gasket and the valve hole seal ring of diaphragm unit 5 are adjacent to.Gas in executive component the first active chamber is discharged by gas port T1, end cap capacitor 501, baffler 162.Simultaneously, pressurized air enters end cap capacitor 401 by the damping hole 7 on the diaphragm unit 4, and enters executive component the second active chamber by gas port T2.Originally, the air pressure that is subject to towards the valve body side on the diaphragm unit 4 is much larger than the air pressure towards end cap capacitor 401 sides, carrying out along with gas replenishment process, actuator movement and to the stroke end, pressure in executive component the second active chamber and the end cap capacitor 401 rises gradually, the both sides air pressure difference of diaphragm unit 4 reduces gradually, thereby the active force on the spool will change, and the promotion spool oppositely moves to the direction of sealed pipe 12.
Spool oppositely moves to the direction of sealed pipe 12, until the seal ring of the rubber gasket of diaphragm unit 5 and sealed pipe 12 is adjacent to, rubber gasket and the valve hole seal ring of diaphragm unit 4 are adjacent to.Gas in executive component the second active chamber is discharged the second executive component active chamber pressure decreased by end cap capacitor 401, baffler 161.Simultaneously, pressurized air enters end cap capacitor 501 by the damping hole on the diaphragm unit 5, and enters execution the first element active chamber by gas port T1.Originally, the air pressure that is subject to towards the valve body side on the diaphragm unit 5 is much larger than the air pressure towards end cap capacitor 501 sides, carrying out along with gas replenishment process, actuator movement and to the stroke end, pressure in executive component the first active chamber and the end cap capacitor 501 rises gradually, the both sides air pressure difference of diaphragm unit 5 reduces gradually, thereby the active force on the spool changes, and the promotion spool oppositely moves to the direction of sealed pipe 11.Executive component is pushed to again the opposite side motion, thereby executive component is by the control of pressure reduction selector valve, automatic reciprocating motion.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. diaphragm type pressure reduction automatic diverter valve comprises
A valve body, its inner shaft is to having through hole, and the side has first, second and third gas port, and the first gas port is communicated with valve hole, and the second, three gas port is two active chambers of external executive component respectively;
Two end caps, it joins with the axial two ends of valve body respectively and forms two cavitys;
Two groups of diaphragm units, it lays respectively in two cavitys, and two diaphragm units axially are divided into two cavitys respectively end cap capacitor and valve body capacitor, and wherein the two end cap capacitor is connected with the second, the three gas port respectively;
Two hollow sealing pipes, it is axially disposed within respectively in the two end cap, and an end of two hollow sealing pipes is communicated with respectively corresponding end cap capacitor, and the other end sidewall has air outlet hole;
A spool connecting rod, it is positioned at valve hole, its two ends respectively with the two diaphragm units formation spool that joins;
Under the draught head effect of two diaphragm units, spool carries out axial reciprocating and moves under the valve body interior diaphragm supports, alternately two sealed pipes and valve hole two ends are carried out end face seal and unlatching.
2. diaphragm type pressure reduction automatic diverter valve according to claim 1 is characterized in that, the gas active area of described two diaphragm units is unequal; Two hollow sealing pipes are communicated with an end of end cap capacitor and the through hole two ends in the valve body are equipped with seal ring, and the bore of the seal ring on the valve hole is greater than the bore of end cap upper sealing ring.
3. diaphragm type pressure reduction automatic diverter valve according to claim 1 and 2 is characterized in that, described two diaphragm units consist of by two metal intermediate plate clampings, one diaphragm, and the metal intermediate plate gas active area of two diaphragm units is unequal; Be processed with the corresponding ventilation damping hole in position on metal intermediate plate and the diaphragm.
4. diaphragm type pressure reduction automatic diverter valve according to claim 3 is characterized in that, the sealing surface of described metal intermediate plate is provided with rubber gasket.
5. diaphragm type pressure reduction automatic diverter valve according to claim 3 is characterized in that, described diaphragm adopts elastomer diaphragm or canvas filler rubber diaphragm.
6. diaphragm type pressure reduction automatic diverter valve according to claim 3 is characterized in that, connects by pin between the two metal intermediate plates of described diaphragm unit.
7. diaphragm type pressure reduction automatic diverter valve according to claim 1 and 2 is characterized in that, screws by screw thread between described sealed pipe and the end cap to connect, and fixes by locking nut.
8. diaphragm type pressure reduction automatic diverter valve according to claim 1 and 2 is characterized in that, described end cap outer cover has baffler.
9. diaphragm type pressure reduction automatic diverter valve according to claim 8 is characterized in that, is provided with rubber pad between described baffler and the end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398892.6A CN102943897B (en) | 2012-10-18 | 2012-10-18 | Pneumatic diaphragm type automatic pressure-difference reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398892.6A CN102943897B (en) | 2012-10-18 | 2012-10-18 | Pneumatic diaphragm type automatic pressure-difference reversing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102943897A true CN102943897A (en) | 2013-02-27 |
| CN102943897B CN102943897B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210398892.6A Expired - Fee Related CN102943897B (en) | 2012-10-18 | 2012-10-18 | Pneumatic diaphragm type automatic pressure-difference reversing valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303045A (en) * | 2020-10-21 | 2021-02-02 | 天津市航昊机电设备有限公司 | Control device of hydraulic motor |
| CN112984163A (en) * | 2021-04-29 | 2021-06-18 | 成都康拓兴业科技有限责任公司 | Diaphragm type oxygen source distributor for airborne oxygen system |
Citations (8)
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|---|---|---|---|---|
| CN2282098Y (en) * | 1996-04-23 | 1998-05-20 | 李强 | Low pressure starting air controlled change valve |
| JP2002023858A (en) * | 2000-07-03 | 2002-01-25 | Ckd Corp | Pilot type pressure proportional control valve system |
| CN1434219A (en) * | 2003-02-21 | 2003-08-06 | 华中科技大学 | Three-position three-way hydraulic change valve |
| JP2004013622A (en) * | 2002-06-07 | 2004-01-15 | Saginomiya Seisakusho Inc | Pressure control valve |
| CN2625678Y (en) * | 2003-07-16 | 2004-07-14 | 单谟君 | Diaphragm electromagnetic valve |
| CN201672091U (en) * | 2010-05-19 | 2010-12-15 | 无锡气动技术研究所有限公司 | Micro-pressure pneumatic reversal valve with adjustable reversing pressure |
| CN102620025A (en) * | 2012-03-31 | 2012-08-01 | 深圳万讯自控股份有限公司 | Double-acting conversion unit for valve positioner |
| CN202884117U (en) * | 2012-10-18 | 2013-04-17 | 华中科技大学 | Pneumatic film type differential pressure automatic reversing valve |
-
2012
- 2012-10-18 CN CN201210398892.6A patent/CN102943897B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2282098Y (en) * | 1996-04-23 | 1998-05-20 | 李强 | Low pressure starting air controlled change valve |
| JP2002023858A (en) * | 2000-07-03 | 2002-01-25 | Ckd Corp | Pilot type pressure proportional control valve system |
| JP2004013622A (en) * | 2002-06-07 | 2004-01-15 | Saginomiya Seisakusho Inc | Pressure control valve |
| CN1434219A (en) * | 2003-02-21 | 2003-08-06 | 华中科技大学 | Three-position three-way hydraulic change valve |
| CN2625678Y (en) * | 2003-07-16 | 2004-07-14 | 单谟君 | Diaphragm electromagnetic valve |
| CN201672091U (en) * | 2010-05-19 | 2010-12-15 | 无锡气动技术研究所有限公司 | Micro-pressure pneumatic reversal valve with adjustable reversing pressure |
| CN102620025A (en) * | 2012-03-31 | 2012-08-01 | 深圳万讯自控股份有限公司 | Double-acting conversion unit for valve positioner |
| CN202884117U (en) * | 2012-10-18 | 2013-04-17 | 华中科技大学 | Pneumatic film type differential pressure automatic reversing valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303045A (en) * | 2020-10-21 | 2021-02-02 | 天津市航昊机电设备有限公司 | Control device of hydraulic motor |
| CN112984163A (en) * | 2021-04-29 | 2021-06-18 | 成都康拓兴业科技有限责任公司 | Diaphragm type oxygen source distributor for airborne oxygen system |
| CN112984163B (en) * | 2021-04-29 | 2021-08-10 | 成都康拓兴业科技有限责任公司 | Diaphragm type oxygen source distributor for airborne oxygen system |
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| Publication number | Publication date |
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| CN102943897B (en) | 2014-05-07 |
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