CN102943897B - Pneumatic diaphragm type automatic pressure-difference reversing valve - Google Patents

Pneumatic diaphragm type automatic pressure-difference reversing valve Download PDF

Info

Publication number
CN102943897B
CN102943897B CN201210398892.6A CN201210398892A CN102943897B CN 102943897 B CN102943897 B CN 102943897B CN 201210398892 A CN201210398892 A CN 201210398892A CN 102943897 B CN102943897 B CN 102943897B
Authority
CN
China
Prior art keywords
diaphragm
valve
end cap
valve body
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201210398892.6A
Other languages
Chinese (zh)
Other versions
CN102943897A (en
Inventor
杨曙东
刘银水
刘雷
李东林
周林
徐涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN201210398892.6A priority Critical patent/CN102943897B/en
Publication of CN102943897A publication Critical patent/CN102943897A/en
Application granted granted Critical
Publication of CN102943897B publication Critical patent/CN102943897B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Pneumatic power diaphragm type pressure reduction automatic diverter valve
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, the 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, by the method for magnet control or pilot slide valve, make reciprocating executive component when moving to stroke end, drive valve core of main valve commutation, change gas circuit, complete the working in reciprocating mode of reciprocating executive component.But the mode of these two kinds of commutations has its certain narrow limitation: much rationing the power supply, explosion-proof occasion, electromagnetic pilot selector valve can not use; Simultaneously guiding valve is higher to manufacturing required precision, has increased production cost, and commutating frequency is restricted, 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
In order to overcome electromagnetic pilot selector valve in existing pneumatic system, can not be used for rationing the power supply, explosion-proof occasion and guiding valve manufacturing complexity, maintenance cost are 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 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 and forms two cavitys with the axial two ends of valve body respectively;
Two groups of diaphragm units, it lays respectively in two cavitys, and two diaphragm units are axially divided into two cavitys respectively end cap capacitor and valve body capacitor, and wherein 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 two end cap, and one 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 valve body interior diaphragm supports, and alternately two sealed pipes and valve hole two ends is carried out to end face seal and unlatching.
Further, the gas active area of described two diaphragm units is unequal; Through hole two ends in one end and the valve body of two hollow sealing pipes connection end cap capacitors are equipped with seal ring, and the bore of the seal ring on valve hole is greater than the bore of end cap upper sealing ring.
Further, described two diaphragm units clamp a diaphragm by two metal intermediate plates and form, and the metal intermediate plate gas active area of two diaphragm units is unequal; The ventilation damping hole that metal intermediate plate is corresponding with being processed with position on 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, between two metal intermediate plates of described diaphragm unit, by pin, connect.
Further, between described sealed pipe and end cap, by screw thread, screw and connect, and fix by locking nut.
Further, described end cap outer cover has baffler.
Further, between described baffler and end cap, be provided with rubber pad.
Compared with existing pneumatic system selector valve, the present invention has following outstanding advantages:
1, the end face seal form that Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention adopts 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 Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention, compared with existing guiding valve, its motion is more flexible.
3, Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention adopts differential automatic reverse mode, without the pilot control commutation of solenoid valve, can be used in ration the power supply, explosion-proof occasion.
4, in Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention, the motion mode of spool in valve body is the swing under diaphragm supports, and simple in structure, manufacturing required precision is much smaller than guiding valve.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
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
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Pneumatic power diaphragm type pressure reduction automatic diverter valve of the present invention as shown in Figure 1, comprises valve body 1, and valve body 1 inner shaft, to having through hole, is processed gas port P, T1, T2 on valve body 1.End cap 2,3 is fixed on the axial two ends of valve body 1 by the screw of circumference uniform distribution.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 unit 4,5, two diaphragm units and respectively the cavity under it be axially divided into end cap capacitor 401,501 and valve body capacitor 402,502.Two diaphragm unit structures are identical, by two metal intermediate plate clamping diaphragms, form, and can connect by pin, to prevent that metal clip sheet from circumferentially rotating between two metal intermediate plates.Between two diaphragm units by being positioned at the spool connecting rod 6 of the valve inner through hole formation spool that joins.Slightly not etc., generally both differ 3% ~ 4% to the metal intermediate plate gas active area of the metal intermediate plate gas active area of primary diaphragm assembly and secondary diaphragm assembly on outside dimension, and both difference slightly make selector valve realize initial commutation.Diaphragm can adopt elastomer diaphragm or canvas filler rubber diaphragm.As Fig. 2, shown in 3, the ventilation damping hole 7 that metal intermediate plate is corresponding with being processed with position on 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.In two end cap, be axially arranged with respectively the sealed pipe 11,12 of first and second hollow, one end of sealed pipe 11 is communicated with end cap capacitor 401, and the other end sidewall has air outlet hole, and one end of sealed pipe 12 is communicated with end cap capacitor 501, and the other end sidewall has air outlet hole.Through hole two ends in one end and the valve body of two hollow sealing pipes connection end cap capacitors are equipped with seal ring.The bore d of the seal ring on valve hole 2be slightly larger than the bore d of end cap upper sealing ring 1differ dimensionally 6 ~ 8% left and right (referring to Fig. 4), make like this when selector valve cut-in operation executive component, when executive component cavity internal pressure reaches commutation pressure, spool can automatic reverse.At gas pressure lower valve core axial reciprocating in valve body, move, alternately two sealed pipes and valve hole two ends are carried out to end face seal and unlatching, specifically: at spool when the first sealed pipe moves, in the first cavity, primary diaphragm assembly is to the first sealed pipe end face seal, simultaneously in the second cavity secondary diaphragm assembly to valve hole end face seal; At spool when the second sealed pipe moves, in the second cavity secondary diaphragm assembly to the second sealed pipe end face seal, simultaneously in the first cavity primary diaphragm assembly to 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, on sealed pipe 11,12, is processed with tool withdrawal groove, is used for placing O RunddichtringO 141,142 and plays seal action.Thread mill drilling on sealed pipe 11,12, fitted bolt 151,152 is pressed on baffler 161,162 on end cap.
As optimization, also can, at the sealing surface vulcanized rubber sealing gasket (referring to Fig. 3) of metal intermediate plate, between end cap and baffler, there is rubber pad 171,172 to play the effect of damping.
Working procedure of the present invention is specially:
By 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 diaphragm unit 4,5, enters end cap capacitor 401,501 by the damping hole 7 on diaphragm unit simultaneously, and by baffler 161,162 exhausts.Because the metal intermediate plate diameter of diaphragm unit 4 is wherein slightly larger than the metal intermediate plate diameter of diaphragm unit 5, pretend to be used in and promote the direction motion of spool to sealed pipe 11 making a concerted effort above spool, 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.Meanwhile, pressurized air enters end cap capacitor 401 by the damping hole 7 on diaphragm unit 4, and enters executive component the second active chamber by gas port T2.Originally, the air pressure being subject to towards valve body side on diaphragm unit 4 is much larger than the air pressure towards end cap capacitor 401 sides, along with the carrying out of gas replenishment process, actuator movement to stroke end, pressure in executive component the second active chamber and end cap capacitor 401 rises gradually, the both sides air pressure difference of diaphragm unit 4 reduces gradually, thereby the active force on spool will change, and promotes spool oppositely to the direction motion 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 by end cap capacitor 401, baffler 161, the second executive component active chamber pressure decreased.Meanwhile, pressurized air enters end cap capacitor 501 by the damping hole on diaphragm unit 5, and is entered and carried out the first element active chamber by gas port T1.Originally, the air pressure being subject to towards valve body side on diaphragm unit 5 is much larger than the air pressure towards end cap capacitor 501 sides, along with the carrying out of gas replenishment process, actuator movement to stroke end, pressure in executive component the first active chamber and end cap capacitor 501 rises gradually, the both sides air pressure difference of diaphragm unit 5 reduces gradually, thereby the active force on spool changes, and promotes spool oppositely to the direction motion of sealed pipe 11.Executive component is pushed to again 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 foregoing is only preferred embodiment of the present invention; not in order to limit 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., within all should being included in protection scope of the present invention.

Claims (8)

1. diaphragm type pressure reduction automatic diverter valve, comprises
A valve body, its inner shaft is to having through hole, and 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 and forms two cavitys with the axial two ends of valve body respectively;
Two groups of diaphragm units, it lays respectively in two cavitys, and two diaphragm units are axially divided into two cavitys respectively end cap capacitor and valve body capacitor, and wherein 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 two end cap, and one 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 valve body interior diaphragm supports, and alternately two sealed pipes and valve hole two ends is carried out to end face seal and unlatching;
The gas active area of described two diaphragm units is unequal; Through hole two ends in one end and the valve body of two hollow sealing pipes connection end cap capacitors are equipped with seal ring, and the bore of the seal ring on valve hole is greater than the bore of end cap upper sealing ring.
2. diaphragm type pressure reduction automatic diverter valve according to claim 1, is characterized in that, described two diaphragm units clamp a diaphragm by two metal intermediate plates and form, and the metal intermediate plate gas active area of two diaphragm units is unequal; The ventilation damping hole that metal intermediate plate is corresponding with being processed with position on diaphragm.
3. diaphragm type pressure reduction automatic diverter valve according to claim 2, is characterized in that, the sealing surface of described metal intermediate plate is provided with rubber gasket.
4. diaphragm type pressure reduction automatic diverter valve according to claim 2, is characterized in that, described diaphragm adopts elastomer diaphragm.
5. diaphragm type pressure reduction automatic diverter valve according to claim 2, is characterized in that, between two metal intermediate plates of described diaphragm unit, by pin, connects.
6. diaphragm type pressure reduction automatic diverter valve according to claim 1, is characterized in that, is screwed and is connected, and fix by locking nut between described sealed pipe and end cap by screw thread.
7. diaphragm type pressure reduction automatic diverter valve according to claim 1, is characterized in that, described end cap outer cover has baffler.
8. diaphragm type pressure reduction automatic diverter valve according to claim 7, is characterized in that, between described baffler and end cap, is provided with rubber pad.
CN201210398892.6A 2012-10-18 2012-10-18 Pneumatic diaphragm type automatic pressure-difference reversing valve Expired - Fee Related CN102943897B (en)

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 CN102943897A (en) 2013-02-27
CN102943897B true CN102943897B (en) 2014-05-07

Family

ID=47726866

Family Applications (1)

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

Country Status (1)

Country Link
CN (1) CN102943897B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
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

Citations (6)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开2002-23858A 2002.01.25
JP特开2004-13622A 2004.01.15

Also Published As

Publication number Publication date
CN102943897A (en) 2013-02-27

Similar Documents

Publication Publication Date Title
CN104564881B (en) Spool transfer composite hydraulic excitation controlling valve
US10883523B2 (en) Fluid pressure cylinder
CN102943897B (en) Pneumatic diaphragm type automatic pressure-difference reversing valve
CN203836059U (en) Three-cylinder adjustable damper with damping force
CN103775431A (en) Hydraulic cylinder capable of being locked at any position by using elastic sleeve
CN104314909B (en) Rotary oscillation cylinder and use pneumatic actuating device and the wiper of this cylinder
CN202280689U (en) Multistage hydraulic cylinder
CN204419740U (en) Spool transfer composite hydraulic excitation controlling valve
CN202884117U (en) Pneumatic film type differential pressure automatic reversing valve
CN202280776U (en) Air spring auxiliary air chamber structure with variable volume
CN102384200B (en) High-damping air spring
WO2018056037A1 (en) Fluid pressure cylinder
CN207513984U (en) Hydraulic cylinder
CN206221418U (en) A kind of adjustable Cushion of High-speed Pneumatic Cylinders device
KR102388299B1 (en) Multi Sealing High Speed Solenoid Valve
CN102305261B (en) Air spring appending air chamber structure with variable volume
CN203463278U (en) Combination valve
CN210371415U (en) Expansion valve core and hydraulic lock structure with same
CN203730735U (en) Hydraulic three-position reversing mechanism
CN202017791U (en) Threaded plug-in two-position three-way cone valve type electromagnetic valve
CN204646857U (en) The multistage hydraulic cylinder that a kind of sectional is flexible
CN205877053U (en) Two -way hydraulic absorber
CN104033626A (en) Double-control integration valve
TW201445063A (en) Fluid pressure cylinder
CN203948376U (en) A kind of advance and retreat cylinder structure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140507

Termination date: 20141018

EXPY Termination of patent right or utility model