CN1256523C - Super high pressure air-actuated proportional pressure-reducing valve - Google Patents

Super high pressure air-actuated proportional pressure-reducing valve Download PDF

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Publication number
CN1256523C
CN1256523C CN 03150842 CN03150842A CN1256523C CN 1256523 C CN1256523 C CN 1256523C CN 03150842 CN03150842 CN 03150842 CN 03150842 A CN03150842 A CN 03150842A CN 1256523 C CN1256523 C CN 1256523C
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CN
China
Prior art keywords
valve
pressure
main valve
piston
pilot valve
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Expired - Fee Related
Application number
CN 03150842
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Chinese (zh)
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CN1523237A (en
Inventor
王宣银
陈奕泽
程佳
梁冬泰
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN 03150842 priority Critical patent/CN1256523C/en
Publication of CN1523237A publication Critical patent/CN1523237A/en
Application granted granted Critical
Publication of CN1256523C publication Critical patent/CN1256523C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention discloses a hyperpressure aerodynamic proportion pressure-reducing valve which adopts a proportion pilot valve and the technique of electrical feedback. The present invention can realize full automation pressure control, save human resource, and enhance reaction speed A main valve adopts gas pressure control, and adjusts pressure height, the designed maximum input pressure reaches 40mpa, and the output pressure of 0 to 25MPa is continuously adjusted. A guide stage gas path adopts a C-shaped simibridge structure, the dynamic damping of the input end is formed from a pilot valve controlled by a ratio electromagnet, and a damping plate is used for the fixed damping of the output end. The input end of the pilot valve is quoted from the gas inlet end of the pressure-reducing valve, the output end is connected with a gas outlet end of the pressure-reducing valve, and the pressure of gas of a pressure regulating chamber is in a dynamic balance state under the control of the pilot valve. The design of a small hole arranged on one side of the lower end of a valve body avoids unnecessary pressure errors, and the difference of the areas of both sides of a piston has the action of the proportional amplification to output pressure, and enhances pressure regulating precision. After the power failure of a system occurs, the pilot valve and the main valve can both be automatically closed under the function of a reset spring and gas pressure.

Description

Ultra-high pressure pneumatic proportional pressure-reducing valve
Technical field
The present invention relates to reduction valve, particularly relate to a kind of ultra-high pressure pneumatic proportional pressure-reducing valve.
Background technique
Superpressure pneumatic reducing valve, present domestic pneumatic pressure-release valve mostly is manual reduction valve greatly, and automaticity is low.The reduction valve delivery pressure is usually all below 10Mpa.Pneumatic pressure-release valve field at ultra-high pressure high flow is manual control, and when the delivery pressure changes in demand, the required adjusting time is long.
Summary of the invention
The purpose of this invention is to provide the better simply ultra-high pressure pneumatic proportional pressure-reducing valve of a kind of structure, the outlet pressure controllability is good, and range of regulation is big, can adjust the height of mouth pressure as required, outlet pressure can be controlled in 0~25MPa scope adjustable continuously, has bigger application area.
In order to achieve the above object, the technical solution used in the present invention is:
It comprises pilot valve and main valve with proportion electro-magnet control, wherein:
1) pilot valve: the pilot valve gas circuit adopts C type half-bridge structure, the input end of half-bridge draws the input end from the pressurized gas of reduction valve, constitute the dynamic gas damping of input end by the pilot valve of proportion electro-magnet control, the output terminal of half-bridge links to each other with the output terminal of reduction valve, and damping plate constitutes the fixedly damping of C type half-bridge; The pilot valve air-inlet cavity has first screw plug, Returnning spring, pilot valve core from top to bottom successively, and the thimble of the push rod in the thimble of pilot valve core lower end and the exhaust cavity of pilot valve contacts, and push rod contacts with the thimble of proportion electro-magnet again.
2) main valve: the valve body upper end has screw and is connected mutually with second screw plug, have a pressure feedback chamber in second screw plug, dress preloading spring in the pressure feedback chamber, connect valve core of main valve under the preloading spring, O type rubber seal is housed between the valve core of main valve and second screw plug, an O type rubber seal is housed on the contact jaw of valve core of main valve and valve seat, one end of valve core of main valve push rod by be threaded and valve core of main valve be fixed together, the other end of valve core of main valve push rod contacts with piston, in the main valve exhaust cavity piston spring is housed, piston is withstood in the piston spring lower end, the valve core of main valve push rod passes from the center of piston spring, valve core of main valve and center, valve core of main valve push rod upper end all have elongated hole, be communicated with main valve exhaust cavity and pressure feedback chamber, the aperture that open cross aperture that open valve core of main valve push rod lower end and piston upper end, guarantee the unobstructed of guide's gas circuit, not influenced by the contact condition of piston and valve core of main valve push rod, valve body lower end has screw and is connected mutually with the 3rd screw plug, flower bud shape circle is adopted in sealing between piston and valve body and the 3rd screw plug, described damping plate is equipped with in the pressure regulating cavity top of piston, and described damping plate top is furnished with guide plate and the below is furnished with back-up ring.
3) the main valve air-inlet cavity is communicated with the pilot valve air-inlet cavity by runner, and pressure regulating cavity is communicated with by runner with the pilot valve exhaust cavity.The lower-left end of valve body has aperture h and is used for piston, and cavity that sealing forms between the 3rd screw plug and the valve body and barometric pressure are communicated with, and guarantees the constant pressure in the cavity.
The present invention includes the pilot valve and the main valve of a proportion electro-magnet control.The setting of the delivery pressure of main valve realizes by the pressure of control pressure regulating cavity.When imbalance of pressure that exhaust cavity and pressure regulating cavity produce piston, produce displacement, act on the main valve plug push rod, realize the unlatching of spool.The pilot valve control that the pressure of pressure regulating cavity is formed with a proportion electro-magnet.Shallow bid gas is via pilot valve, and pressure regulating cavity converges with the exit gas of main valve plug by damping plate more again.Pilot valve is formed a C type half-bridge as the dynamic antivibration effect of an input end and the fixedly vapour lock of output terminal.The gas of pressure regulating cavity is in the state of transient equiliblium.
The present invention compares with background technique, and the useful effect that has is:
1, adopts proportional pilot valve and electric feedback technique, can realize full-automatic pressure control, save human resources, improved reaction velocity;
2, pilot valve and main valve all can be closed under Returnning spring and gas pressure automatically when system's power down;
3, unnecessary pressure error has been avoided in the design of the aperture h that opens of valve body lower end one side, has improved pressure controling precision;
4, the compression area difference of piston both sides is less with the area of pressure regulating cavity homonymy, plays the ratio amplification to delivery pressure, has improved pressure controling precision;
5, the highest incoming pressure of system design reaches 40MPa, and delivery pressure 0~25MPa is adjustable continuously, design peak rate of flow 12L/min.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Accompanying drawing is a structural representation of the present invention.
Embodiment
As shown in drawings, structure of the present invention can be divided into pilot valve and main valve two large divisions on function.
1) pilot valve: the pilot valve gas circuit is a C type half-bridge structure, the input end of half-bridge draws the input end P from the pressurized gas of reduction valve, constitute the dynamic gas damping of input end by the pilot valve of proportion electro-magnet 22 controls, the output terminal of half-bridge links to each other with the output terminals A of reduction valve, and damping plate 23 constitutes the fixedly damping of C type half-bridge; Pilot valve air-inlet cavity d has first screw plug 17, O type rubber seal 18, Returnning spring 19, pilot valve core 20 from top to bottom successively, and wherein O type rubber seal 18 is used for the sealing of pilot valve air-inlet cavity d upper end.Open guide table on the pilot valve, guarantee the aligning of spool, convince air drain around the guide table by patient analysis, and evenly distribute, guarantee the perforation in d chamber.The thimble of push rod 21 upper ends among the thimble of pilot valve core 20 lower ends and the pilot valve exhaust cavity e contacts, and the lower end of push rod 21 contacts with the thimble of proportion electro-magnet 22 again.
2) main valve: valve body 3 upper ends have screw and are connected mutually with second screw plug 14, and O rubber seal 16 is arranged under second screw plug, to guarantee the sealing of upper end.Have a pressure feedback chamber f in second screw plug 14, dress preloading spring 15 in the f of pressure feedback chamber, connect main valve plug 12 under the spring, between the main valve plug 12 and second screw plug 14 O type rubber seal 13 is housed, an O type rubber seal 11 is housed on the contact jaw of main valve plug and valve seat, one end of main valve plug push rod 10 by be threaded and main valve plug 12 be fixed together, the other end of main valve plug push rod contacts with piston 6, and the piston displacement signal that makes the variation in pressure of pressure regulating cavity c bring can pass to main valve plug.Among the main valve exhaust cavity b piston spring 9 is housed, piston 6 is withstood in piston spring 9 lower ends, makes its position that is in work, has the function that makes piston reset simultaneously.Main valve plug push rod 10 passes from spring center, and valve core of main valve 12 and center, main valve plug push rod 10 upper end all have elongated hole, is communicated with main valve exhaust cavity b and pressure feedback chamber f, makes the pressure in two chambeies equate the pressure that balance main valve plug two ends are suffered.The aperture that open cross aperture that open main valve plug push rod lower end and piston upper end, main valve exhaust cavity b and pressure regulating cavity c are communicated with, valve body 3 lower ends have screw and are connected mutually with the 3rd screw plug 1, seal with O RunddichtringO 2 between screw plug 1 and the valve body 3, flower bud shape circle 4 is adopted in sealing between piston 6 and valve body 3 and the 3rd screw plug 1, because pressure is higher, flower bud shape circle 4 is with back-up ring 5.The pressure regulating cavity c of piston is equipped with damping plate 23 in the top, and damping plate 23 tops are furnished with guide plate 8 and the below is furnished with back-up ring 7, and back-up ring 7 is connected with piston, with fixing damping plate.
3) main valve air-inlet cavity a is communicated with pilot valve air-inlet cavity d by runner, and pressure regulating cavity c is communicated with by runner with pilot valve exhaust cavity e.The lower-left end of valve body has aperture h and is used for the cavity and the barometric pressure of sealing formation between piston 6, the three screw plugs 1 and the valve body 3 are communicated with, and guarantees the constant pressure in the cavity.
Working principle of the present invention is: utilize a pilot valve with proportion electro-magnet control to control the output set pressure of main valve.Shallow bid gas is via pilot valve, and pressure regulating cavity converges with the exit gas of main valve plug by a damping plate more again.Pilot valve is formed a C type half-bridge as the dynamic antivibration effect of an input end and the fixedly vapour lock of output terminal.The gas of pressure regulating cavity is in the state of transient equiliblium.Its pressure size is established pressure transducer in addition on the output terminal of gas between input end pressure and output end pressure, the monitoring delivery pressure feeds back to proportion electro-magnet, dynamically adjusts the aperture of pilot valve, improves pressure controlled precision.Under the situation of system's power down, pilot valve core can be under the pressure difference of Returnning spring and gas close port.Pressure regulating cavity can not get gas make-up, pressure drops to identical with delivery pressure gradually, because piston 6 is bigger with the compression area of main valve exhaust cavity b homonymy, piston moves down, main valve plug loses thrust upwards, valve core of main valve moves down under the action of pressure of preloading spring and both sides simultaneously, thereby has closed main valve.

Claims (2)

1, a kind of ultra-high pressure pneumatic proportional pressure-reducing valve is characterized in that: it comprises pilot valve and main valve with proportion electro-magnet control, wherein:
1) pilot valve: pilot valve is a C type half-bridge structure, the input end of half-bridge draws from the input end of the pressurized gas of reduction valve (P), constitute the dynamic gas damping of input end by the pilot valve of proportion electro-magnet (22) control, the output terminal of half-bridge links to each other with the output terminal of reduction valve (A), and damping plate (23) constitutes the fixedly damping of C type half-bridge; Pilot valve air-inlet cavity (d) has first screw plug (17), Returnning spring (19), pilot valve core (20) from top to bottom successively, the thimble of the push rod (21) in the thimble of pilot valve core (20) lower end and the pilot valve exhaust cavity (e) contacts, and push rod (21) contacts with the thimble of proportion electro-magnet (22) again;
2) main valve: valve body (3) upper end has screw and is connected mutually with second screw plug (14), have a pressure feedback chamber (f) in second screw plug (14), dress preloading spring (15) in the pressure feedback chamber (f), connect valve core of main valve (12) under the preloading spring (15), between valve core of main valve (12) and second screw plug (14) O type rubber seal (13) is housed, an O type rubber seal (11) is housed on the contact jaw of valve core of main valve and valve seat, one end of valve core of main valve push rod (10) is by being threaded and valve core of main valve (12) is fixed together, the other end of valve core of main valve push rod contacts with piston (6), piston spring (9) is housed in the main valve exhaust cavity (b), piston (6) is withstood in piston spring (9) lower end, valve core of main valve push rod (10) passes from the center of piston spring (9), valve core of main valve (12) and center, valve core of main valve push rod (10) upper end all have elongated hole, be communicated with main valve exhaust cavity (b) and pressure feedback chamber (f), the aperture that open cross aperture that open valve core of main valve push rod lower end and piston upper end, main valve exhaust cavity (b) and pressure regulating cavity (c) are communicated with, valve body (3) lower end has screw and is connected mutually with the 3rd screw plug (1), flower bud shape circle (4) is adopted in sealing between piston (6) and valve body (3) and the 3rd screw plug (1), described damping plate (23) is equipped with in the pressure regulating cavity of piston (c) top, and described damping plate (23) top is furnished with guide plate (8) and the below is furnished with back-up ring (7);
3) main valve air-inlet cavity (a) is communicated with pilot valve air-inlet cavity (d) by runner, and pressure regulating cavity (c) is communicated with by runner with pilot valve exhaust cavity (e).
2. a kind of ultra-high pressure pneumatic proportional pressure-reducing valve according to claim 1 is characterized in that: the lower-left end of valve body (3) has aperture (h) with piston (6), and cavity that sealing forms between the 3rd screw plug (1) and the valve body (3) and barometric pressure are communicated with.
CN 03150842 2003-09-03 2003-09-03 Super high pressure air-actuated proportional pressure-reducing valve Expired - Fee Related CN1256523C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03150842 CN1256523C (en) 2003-09-03 2003-09-03 Super high pressure air-actuated proportional pressure-reducing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 03150842 CN1256523C (en) 2003-09-03 2003-09-03 Super high pressure air-actuated proportional pressure-reducing valve

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CN1523237A CN1523237A (en) 2004-08-25
CN1256523C true CN1256523C (en) 2006-05-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101337547B (en) * 2008-08-14 2010-10-13 赵忠初 Brake emergency relay valve capable of automatic switching and automatic switching regulation valve

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EP1872040B1 (en) * 2005-04-07 2013-03-27 Chubb International Holdings Limited Self-regulating valve for controlling the gas flow in high pressure systems
AT411477T (en) * 2006-04-22 2008-10-15 Festo Ag & Co Kg Linear drive device
CN100414154C (en) * 2006-11-08 2008-08-27 宁波华液机器制造有限公司 Direct action type proportional pressure-reducing valve
CN101709800B (en) * 2009-12-22 2011-09-28 袁勇 High-precision quick response pilot valve
CN101750117B (en) * 2010-03-05 2011-08-10 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 High-pressure gas metering device
CN101869788B (en) * 2010-06-09 2012-07-04 三一重型装备有限公司 Emulsion backwash filter station and hydraulic control change valve thereof
CN102032229B (en) * 2010-11-12 2013-03-27 宁波华液机器制造有限公司 Valve with double valve cores for pneumatic valve terminal
CN105313917B (en) * 2014-07-28 2018-02-27 中车青岛四方车辆研究所有限公司 EMU and the double diaphragm plate relay valves of city rail vehicle
CN106321542B (en) * 2016-09-08 2017-11-24 华中科技大学 Guiding high pressure air-powered electromagnetic switch valve
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CN106907505B (en) * 2017-04-10 2018-10-12 浙江大学 The high-pressure pneumatic proportional pressure-reducing valve of sylphon seal
CN107654435B (en) * 2017-11-15 2019-07-12 济宁落陵春辉机械制造有限公司 A kind of proportional flow shut-off valve

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