CN102748506B - Electro-hydraulic pilot control switch valve bank - Google Patents
Electro-hydraulic pilot control switch valve bank Download PDFInfo
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- CN102748506B CN102748506B CN 201210228324 CN201210228324A CN102748506B CN 102748506 B CN102748506 B CN 102748506B CN 201210228324 CN201210228324 CN 201210228324 CN 201210228324 A CN201210228324 A CN 201210228324A CN 102748506 B CN102748506 B CN 102748506B
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Abstract
The invention relates to an electro-hydraulic pilot control switch valve bank which is particularly suitable for liquid charging and discharging control of equipment such as a valve-controlled coupler and the like with the work characteristics of low pressure and high flow rate. According to the defects of a conventional hydraulic controlled type control valve and a pressure difference type control valve, the invention provides an electro-hydraulic pilot control switch valve bank which consists of three main valves with same structures, three two-position two-way electromagnetic pilot valves and an adapter plate, wherein the three main valves, namely, a liquid filling valve, a liquid discharging valve and a stop valve, are installed in a valve block, the liquid discharging valve and the stop valve are positioned above the valve block side by side, and spring cavities are arranged at the upper parts of the liquid discharging valve and the stop valve, the liquid filling valve is positioned at the left lower part of the valve block, and a spring cavity is arranged at the lower part of the liquid filling valve; the liquid discharging valve and the stop valve are provided with same water inlets, and the liquid filling valve and the stop valve are provided with same water outlets; and the three electromagnetic pilot valves are connected in parallel, and pass through the liquid filing valve and the stop valve to be communicated to the inner part of the coupler. The electro-hydraulic pilot control switch valve bank has a compact structure, is simple in control mode and high in flow; and a main valve plug adopts plane sealing, is large in pressing force and good in sealing effect.
Description
Technical field
The present invention relates to a kind of electric liquid pilot control switch valve group, be particularly useful for the discharge opeing of filling that valve control coupler etc. has low pressure and mass flow performance characteristic equipment and control.
Background technique
Valve control coupler adopts pure water as working medium, changes in the course of the work liquid frequent, fills draining flow large.Equipment with this type of work characteristics to the requirement of control valve group be response fast, large, the reliable in action of flow etc.In the prior art, adapt to the control valve that low pressure and mass flow requires, its control form mainly contains two kinds: hyraulic controlled type and differential.
The hyraulic controlled type switch valve utilizes control piston, by the hydraulic coupling of piston control chamber, piston is moved, and then the switch spool is opened; Control chamber earth pressure release or during without pressure, close the switch valve core reset by spring force.This control mode is to the pressure of the through-flow medium of main valve without specific (special) requirements, and action is simple; Pilot pressure is large simultaneously, and main valve events is fast, but course of action has certain impact.The hyraulic controlled type switch valve had now for aqueous medium exists through-current capability little, and sealing effect is poor, and control liquid of long duration and through-flow medium easily produce and alter liquid phenomenon etc.
The switch spool upper and lower cavity of differential switch valve connects by damping hole, and when pilot valve is opened, liquid flows into the spool epicoele by damping hole from the spool cavity of resorption, and, because the throttling action of damping hole forms pressure reduction, promotes spool and open; When pilot valve is closed, between upper and lower cavity, no liquid flows, and the throttling action of damping hole disappears, and upper and lower cavity pressure reduction disappears, and spool resets and closes under the effect of spring force.The mode that pressure reduction is controlled does not need to connect controls liquid, lower to the requirement of system; Without control units such as control pistons, relatively simple on structure.Due to the damping hole that has used little latus rectum, therefore the turbidity test of working medium had to certain requirement, minimum liquid supply pressure also be there are certain requirements, to form enough pressure reduction, open spool.
Existing large flow switch control valve volume is large, and sealing effect is poor, and reliability is low, and the method for there is no meets the demand of the equipment such as valve control coupler to the low pressure and mass flow valve.The patent No. is ZL200720067301.1, name is called the utility model patent of " large flow rate electrohydraulic control valve ", adopted the principle of Pilot operated check valve reverse operation, but its control liquid is identical with the main valve working solution, after main valve open, controlling hydraulic coupling reduces with working fluid pressure, control performance to spool can have a negative impact, and its function singleness, need a plurality of valve co-operation to loop control to feed liquor, discharge opeing and the working solution of coupler, increased pipeline and connected and equipment volume.
Summary of the invention
The objective of the invention is: for the deficiencies in the prior art, provide the electric liquid pilot control switch valve group that a kind of through-current capability is large, be easy to control, good sealing effect, compact structure, reliable operation.
The technical solution adopted for the present invention to solve the technical problems is: by three structures, identical main valve, three bi-bit bi-pass electromagnetic priority valves and pinboard form, three main valves are that liquid-filling valve, liquid discharging valve, stop valve are arranged in the valve piece, the top that liquid discharging valve and stop valve are positioned at the valve piece is arranged side by side, and spring chamber is upper; Liquid-filling valve is positioned at the left bottom of valve piece, spring chamber under;
Electromagnetic priority valve is connected with the main valve on the valve piece by pinboard, and liquid-filling valve is connected with electromagnetic priority valve, liquid discharging valve is connected with electromagnetic priority valve, stop valve is connected with electromagnetic priority valve;
Main valve is comprised of bonnet, bottom flange, spring, piston seal, main valve plug, plane sealing and valve piece, and main valve plug is the plug-in type structure, and an end hollow is equipped with spring and forms spring chamber, and the other end is provided with guide rod; The main valve plug cylindrical embeds piston seal, the sealing of main valve plug end face embedded plane; The piston seal of main valve plug and the excircle part between plane sealing and valve piece form the side chamber; Spring chamber is connected with electromagnetic priority valve import separately by the internal duct on the valve piece, by damping hole, with water intake and main valve plug side chamber, communicates simultaneously; Liquid-filling valve water intake on the water intake connecting valve piece of liquid-filling valve, the liquid-filling valve water intake is communicated with extraneous water supply; Water intake on the equal connecting valve piece of the water intake of liquid discharging valve and stop valve, water intake communicates with the coupler liquid port; Water outlet on the equal connecting valve piece of the water outlet of liquid-filling valve and stop valve, water outlet communicates with the coupler water intake; Water outlet on liquid discharging valve water outlet connecting valve piece, water outlet communicates with the external world.
The invention has the beneficial effects as follows: 1, compact structure.Liquid-filling valve, stop valve and liquid discharging valve are integrated in same valve body, have reduced the pipeline connection, dwindled volume, alleviated weight, be more convenient for transportation and installation; 2, good sealing effect.Adopt plane sealing structure, when main valve plug is closed, by spring force and the acting in conjunction of epicoele hydraulic coupling, main valve plug has been pressed on valve seat, realized reliable sealing; 3, reliable in action.Main valve plug radially adopts piston seal, plays seal action on the one hand, on the other hand because sealing surface is wider, can play certain leading role; An end at main valve plug has added guide rod, strengthens the stability of main valve plug motion, makes valve core movement more reliable; 4, to system require low.Adopt the pressure reduction leading type to control, without pilot line and independent control liquid, simplified system layout; 5, the expanded application ability is strong.Electromagnetic priority valve is connected with main valve by pinboard, for adapting to different operating modes and controlling requirement, can change electromagnetic priority valve and pinboard, and valve group other parts need not be changed, and expanded application is very convenient.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is working principle schematic diagram of the present invention.
In figure: A, electromagnetic priority valve (often opening), B, electromagnetic priority valve (normally closed), C, electromagnetic priority valve (normally closed), 1, pinboard, 2, bonnet, 8, bottom flange, 3, spring, 4, piston seal, 5, main valve plug, 6, plane sealing, 7, main valve body, I, liquid-filling valve, II, liquid discharging valve, III, stop valve, a, damping hole, b, liquid discharging valve water outlet (discharged to the external world), c, liquid discharging valve and stop valve water intake (connecing the coupler water outlet), d, liquid-filling valve water intake (being supplied water by the external world), e, water outlet (connecing the coupler water intake), m, the side chamber, n, spring chamber.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Shown in Fig. 1, Fig. 2, by three structures, identical main valve, three bi-bit bi-pass electromagnetic priority valves and pinboard 1 form, three main valves are that liquid-filling valve I, liquid discharging valve II, stop valve III are arranged in valve piece 7, the top that liquid discharging valve II and stop valve III are positioned at valve piece 7 is arranged side by side, and spring chamber is upper; Liquid-filling valve I is positioned at the left bottom of valve piece 7, spring chamber under;
Electromagnetic priority valve is connected with the main valve on valve piece 7 by pinboard 1, and liquid-filling valve I is connected with electromagnetic priority valve B, liquid discharging valve II is connected with electromagnetic priority valve C, stop valve III is connected with electromagnetic priority valve A;
Main valve is comprised of bonnet 2, bottom flange 8, spring 3, piston seal 4, main valve plug 5, plane sealing 6 and valve piece 7, and main valve plug 5 is the plug-in type structure, and an end hollow is equipped with spring and forms spring chamber n, and the other end is provided with guide rod; Main valve plug 5 cylindricals embed piston seal 4, main valve plug 5 end face embedded plane sealings 6; The piston seal 4 of main valve plug 5 and the excircle part between plane sealing 6 and valve piece 7 form side chamber m; Spring chamber n is connected with electromagnetic priority valve import separately by the internal duct on valve piece 7, by damping hole, with water intake and main valve plug 5 side chamber m, communicates simultaneously; Liquid-filling valve water intake d on the water intake connecting valve piece 7 of liquid-filling valve I, liquid-filling valve water intake d is communicated with extraneous water supply; Water intake c on the equal connecting valve piece 7 of the water intake of liquid discharging valve II and stop valve III, water intake c communicates with the coupler liquid port; Water outlet e on the equal connecting valve piece 7 of the water outlet of liquid-filling valve I and stop valve III, water outlet e communicates with the coupler water intake; Water outlet b on liquid discharging valve II water outlet connecting valve piece 7, water outlet b communicates with the external world.
In work, electromagnetic priority valve A often is made as and opens, and electromagnetic priority valve B and C are made as normally closed; When system starts, by the external world to liquid-filling valve water intake d feed flow, when electromagnetic priority valve B is failure to actuate in closed state, the flow of liquid-filling valve I damping hole of flowing through is zero, now damping hole does not play damping function, liquid-filling valve I main valve plug spring chamber and side cavity pressure equate, the spring chamber effective active area is much larger than side chamber effective active area, under the acting in conjunction of spring chamber hydraulic coupling and spring force, liquid-filling valve I main valve plug is pressed on valve seat, liquid-filling valve I is in closed condition, and now, coupler inside does not have liquid to enter; When electromagnetic priority valve B switches in open mode, liquid-filling valve I main valve plug spring chamber liquid is discharged and enters coupler by the e mouth through electromagnetic priority valve B, throttling action due to damping hole, liquid-filling valve I main valve plug spring chamber and side chamber form pressure reduction, spring chamber pressure is significantly less than the side cavity pressure, and when the hydraulic coupling in side chamber overcomes the hydraulic coupling, spring force of spring chamber and frictional force, the main valve plug of liquid-filling valve I is opened, now, extraneous feed flow enters coupler inside.
When coupler has reached specified filling amount, system starts the complete normal operation that proceeds to, in coupler, liquid is in recurrent state, and enter the water intake c of liquid discharging valve II and stop valve III under centrifugal action, the electromagnetic priority valve A of stop valve III adopts normally open valve, its main valve plug spring chamber communicates with water outlet e, throttling action due to damping hole, stop valve III main valve plug spring chamber and side chamber form pressure reduction, spring chamber pressure is significantly less than the side cavity pressure, the hydraulic coupling in side chamber overcomes the hydraulic coupling of spring chamber, spring force and frictional force, the main valve plug of stop valve III is opened, now, the liquid that coupler is discharged through the c mouth is got back in coupler through the e mouth again.Simultaneously, the electromagnetic priority valve A of liquid discharging valve II adopts normally close valve, the flow of liquid discharging valve II damping hole of flowing through is zero, now damping hole does not play damping function, and liquid discharging valve II main valve plug spring chamber and side cavity pressure are equal, and the spring chamber effective active area is much larger than side chamber effective active area, under the acting in conjunction of spring chamber hydraulic coupling and spring force, liquid discharging valve II main valve plug is pressed on valve seat, and liquid discharging valve II is in closed condition, not to extraneous discharge opeing.
When the coupler discharge opeing, the electromagnetic priority valve C of liquid discharging valve II obtains electric opening, and needs the electromagnetic priority valve A of stop valve III to obtain electric closing simultaneously, and according to above-mentioned same principle, the liquid process liquid discharging valve water outlet b in coupler is discharged to the external world.
Claims (1)
1. an electric liquid pilot control switch valve group, it is characterized in that: by three structures, identical main valve, three bi-bit bi-pass electromagnetic priority valves and pinboard (1) form, three main valves are that liquid-filling valve (I), liquid discharging valve (II), stop valve (III) are arranged in valve piece (7), the top that liquid discharging valve (II) and stop valve (III) are positioned at valve piece (7) is arranged side by side, and spring chamber is upper; Liquid-filling valve (I) is positioned at the left bottom of valve piece (7), spring chamber under;
Electromagnetic priority valve is connected with the main valve on valve piece (7) by pinboard (1), and liquid-filling valve (I) is connected with electromagnetic priority valve B, liquid discharging valve (II) is connected with electromagnetic priority valve C, stop valve (III) is connected with electromagnetic priority valve A;
Main valve is comprised of bonnet (2), bottom flange (8), spring (3), piston seal (4), main valve plug (5), plane sealing (6) and valve piece (7), main valve plug (5) is the plug-in type structure, one end hollow, spring is installed and forms spring chamber (n), the other end is provided with guide rod; Main valve plug (5) cylindrical embeds piston seal (4), main valve plug (5) end face embedded plane sealing (6); The piston seal (4) of main valve plug (5) and the excircle part between plane sealing (6) and valve piece (7) form side chamber (m); Spring chamber (n) is connected with electromagnetic priority valve import separately by the internal duct on valve piece (7), communicates with water intake by damping hole simultaneously, and communicates with main valve plug (5) side chamber (m) by damping hole; Liquid-filling valve water intake (d) on the water intake connecting valve piece (7) of liquid-filling valve (I), liquid-filling valve water intake (d) is communicated with extraneous water supply; Water intake (c) on the equal connecting valve piece of the water intake of liquid discharging valve (II) and stop valve (III) (7), water intake (c) communicates with the coupler liquid port; Water outlet e on the equal connecting valve piece of the water outlet of liquid-filling valve (I) and stop valve (III) (7), water outlet e communicates with the coupler water intake; Water outlet b on liquid discharging valve (II) water outlet connecting valve piece (7), water outlet b communicates with the external world.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210228324 CN102748506B (en) | 2012-06-21 | 2012-06-21 | Electro-hydraulic pilot control switch valve bank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210228324 CN102748506B (en) | 2012-06-21 | 2012-06-21 | Electro-hydraulic pilot control switch valve bank |
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| CN102748506A CN102748506A (en) | 2012-10-24 |
| CN102748506B true CN102748506B (en) | 2013-12-18 |
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| CN 201210228324 Active CN102748506B (en) | 2012-06-21 | 2012-06-21 | Electro-hydraulic pilot control switch valve bank |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5805704B2 (en) * | 2013-05-16 | 2015-11-04 | 株式会社エクセディ | Torque converter lockup device |
| CN103742673B (en) * | 2014-01-22 | 2016-06-29 | 杭州神林电子有限公司 | Valve |
| CN107542921B (en) * | 2017-08-28 | 2019-11-08 | 中国煤炭科工集团太原研究院有限公司 | The self-operated type tank level control system of coupling device |
| CN111120698A (en) * | 2019-12-18 | 2020-05-08 | 中国航空工业集团公司西安飞行自动控制研究所 | Pilot valve and main valve integrated valve combination |
| CN116928384A (en) * | 2022-03-31 | 2023-10-24 | 比亚迪股份有限公司 | Runner integrated valve and vehicle that has it |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223120A (en) * | 1963-08-07 | 1965-12-14 | Parker Hannifin Corp | Solenoid operated valve assembly |
| GB1396926A (en) * | 1971-06-29 | 1975-06-11 | Koppen Lethem Trading | Control device for load-independent regulation of hydraulic consumers |
| CN2208128Y (en) * | 1994-09-29 | 1995-09-20 | 内蒙古液压技术研究所 | Water return automatic open and close valve for pressureless boilers |
| CN2625678Y (en) * | 2003-07-16 | 2004-07-14 | 单谟君 | Diaphragm electromagnetic valve |
| CN201715035U (en) * | 2010-07-09 | 2011-01-19 | 钱连合 | Dual valve |
-
2012
- 2012-06-21 CN CN 201210228324 patent/CN102748506B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223120A (en) * | 1963-08-07 | 1965-12-14 | Parker Hannifin Corp | Solenoid operated valve assembly |
| GB1396926A (en) * | 1971-06-29 | 1975-06-11 | Koppen Lethem Trading | Control device for load-independent regulation of hydraulic consumers |
| CN2208128Y (en) * | 1994-09-29 | 1995-09-20 | 内蒙古液压技术研究所 | Water return automatic open and close valve for pressureless boilers |
| CN2625678Y (en) * | 2003-07-16 | 2004-07-14 | 单谟君 | Diaphragm electromagnetic valve |
| CN201715035U (en) * | 2010-07-09 | 2011-01-19 | 钱连合 | Dual valve |
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| CN102748506A (en) | 2012-10-24 |
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