CN102748506A - Electro-hydraulic pilot control switch valve bank - Google Patents
Electro-hydraulic pilot control switch valve bank Download PDFInfo
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- CN102748506A CN102748506A CN2012102283241A CN201210228324A CN102748506A CN 102748506 A CN102748506 A CN 102748506A CN 2012102283241 A CN2012102283241 A CN 2012102283241A CN 201210228324 A CN201210228324 A CN 201210228324A CN 102748506 A CN102748506 A CN 102748506A
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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 guide control switch valve group, what be particularly useful for that valve control coupler etc. has low pressure and mass flow performance characteristic equipment fills discharge opeing control.
Background technique
Valve control coupler adopts pure water as working medium, and it is frequent to change liquid in the course of the work, and it is big to fill draining flow.Equipment with this type of work characteristics to the requirement of control valve group be response fast, big, 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 type 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 pressure discharges or when not having pressure, then by spring force the switch valve core reset is closed.This control mode does not have specific (special) requirements to the pressure of the through-flow medium of main valve, and action is simple; Pilot pressure is big simultaneously, and main valve events is fast, but course of action has certain impact.The existing hyraulic controlled type switch valve that is used for aqueous medium exists through-current capability little, and sealing effect is poor, and control liquid of long duration and through-flow medium are prone to produce scurries liquid phenomenon etc.
The switch spool upper and lower cavity of differential switch valve connects through damping hole, and when pilot valve was opened, liquid flowed into the spool epicoele through 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 was closed, no liquid flowed between the upper and lower cavity, and the throttling action of damping hole disappears, and upper and lower cavity pressure reduction disappears, and spool resets under the effect of spring force and closes.The mode of pressure reduction control need not connect control liquid, and is lower to the requirement of system; Control units such as no control piston are simple relatively on the structure.Owing to used the damping hole of little latus rectum, therefore the turbidity test to working medium have certain requirement, and minimum liquid supply pressure is also had certain requirement, to form enough pressure reduction, open spool.
Existing big flow switch control valve volume is big, and sealing effect is poor, and reliability is low, still can't satisfy the demand of 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 " big flow electro-hydraulic control valve ", has 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; The control hydraulic coupling reduces with working fluid pressure, can have a negative impact to the control performance of spool, and its function singleness; Need a plurality of valve co-operation to control, increased pipeline and connected and equipment volume feed liquor, discharge opeing and the working solution circulation of coupler.
Summary of the invention
The objective of the invention is: to the deficiency of existing technology, provide a kind of through-current capability big, be easy to control, the electric liquid guide control switch valve group of good sealing effect, compact structure, reliable operation.
The technical solution adopted for the present invention to solve the technical problems is: be made up of the identical main valve of three structures, three bi-bit bi-pass electromagnetic priority valves and pinboard; Three main valves are that liquid-filling valve, liquid discharging valve, stop valve are installed 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 last; Liquid-filling valve is positioned at the left bottom of valve piece, and spring chamber is following;
Electromagnetic priority valve is connected with main valve on the valve piece through 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 made up 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, and the main valve plug end face embeds plane sealing; The piston seal of main valve plug and the excircle part between the plane sealing and valve piece form the side chamber; Spring chamber is connected with electromagnetic priority valve import separately through the internal duct on the valve piece, communicates with water intake and main valve plug side chamber through damping hole 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 the 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 the same valve body, have reduced the pipeline connection, dwindled volume, alleviated weight, be more convenient for transportation and installation; 2, good sealing effect.Adopted plane sealing structure, when main valve plug is closed,, main valve plug has been pressed on the valve seat, realized reliable sealing by spring force and the acting in conjunction of epicoele hydraulic coupling; 3, reliable in action.Main valve plug radially adopts piston seal, plays seal action on the one hand, on the other hand because the sealing surface broad can play certain leading role; 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 control of pressure reduction leading type, need not pilot line and independent control liquid, simplified system layout; 5, the expanded application ability is strong.Electromagnetic priority valve is connected with main valve through pinboard, for adapting to different working conditions and control requirement, can change electromagnetic priority valve and pinboard, and other part of valve group need not be changed, and expanded application is very convenient.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a working principle schematic representation of the present invention.
Among the 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 (row is to the external world), c, liquid discharging valve and stop valve water intake (connecing the coupler water outlet); D, liquid-filling valve water intake (supplying water) by the external world, e, water outlet (connecing the coupler water intake), m, side chamber, n, spring chamber.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done further to describe:
At Fig. 1, shown in Figure 2; Constitute by the identical main valve of three structures, three bi-bit bi-pass electromagnetic priority valves and pinboard 1; Three main valves are that liquid-filling valve I, liquid discharging valve II, stop valve III are installed in the 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 last; Liquid-filling valve I is positioned at the left bottom of valve piece 7, and spring chamber is following;
Electromagnetic priority valve is connected with main valve on the valve piece 7 through 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 made up 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, and main valve plug 5 end faces embed plane sealing 6; The piston seal 4 of main valve plug 5 and the excircle part between the plane sealing 6 and valve piece 7 form side chamber m; Spring chamber n is connected with electromagnetic priority valve import separately through the internal duct on the valve piece 7, communicates with water intake and main valve plug 5 side chamber m through damping hole 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 the liquid discharging valve II water outlet connecting valve piece 7, water outlet b communicates with the external world.
In the work, electromagnetic priority valve A often is made as and opens, and electromagnetic priority valve B and C are made as normally closed; During system start-up, to liquid-filling valve water intake d feed flow, electromagnetic priority valve B is in closed state when being failure to actuate by the external world; The flow of liquid-filling valve I damping hole of flowing through is zero, and this moment, damping hole did not play damping function, and liquid-filling valve I main valve plug spring chamber and side cavity pressure are equal; The spring chamber effective active area is effective active area much larger than the side chamber; Under the acting in conjunction of spring chamber hydraulic coupling and spring force, liquid-filling valve I main valve plug is pressed on the valve seat, and liquid-filling valve I is in closed condition; At this moment, coupler inside does not have liquid to get into; When electromagnetic priority valve B energising was in open mode, liquid-filling valve I main valve plug spring chamber liquid was discharged through electromagnetic priority valve B and is got into coupler by the e mouth, because the throttling action of 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 overcame hydraulic coupling, spring force and the frictional force of spring chamber, the main valve plug of liquid-filling valve I promptly was opened; At this moment, extraneous feed flow gets into coupler inside.
When coupler has reached specified filling amount, system start-up finishes and changes normal operation over to, and liquid is in recurrent state in the coupler; And under centrifugal action, get into the water intake c of liquid discharging valve II and stop valve III, and the electromagnetic priority valve A employing normally open valve of stop valve III, its main valve plug spring chamber communicates with water outlet e; Because the throttling action of damping hole, stop valve III main valve plug spring chamber and side chamber form pressure reduction, and spring chamber pressure is significantly less than the side cavity pressure; The hydraulic coupling in side chamber overcomes hydraulic coupling, spring force and the frictional force of spring chamber; The main valve plug of stop valve III is opened, and at this moment, the liquid that coupler is discharged through the c mouth is got back in the coupler through the e mouth again.Simultaneously, the electromagnetic priority valve A of liquid discharging valve II adopts normally close valve, and the flow of the liquid discharging valve II damping hole of flowing through is zero; This moment, damping hole did not play damping function, and liquid discharging valve II main valve plug spring chamber and side cavity pressure equate that the spring chamber effective active area is effective active area much larger than the side chamber; Under the acting in conjunction of spring chamber hydraulic coupling and spring force; Liquid discharging valve II main valve plug is pressed on the 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 gets electric opening, and needs the electromagnetic priority valve A of stop valve III to get electric closing simultaneously, and according to above-mentioned same principle, the liquid in the coupler is arranged to the external world through liquid discharging valve water outlet b.
Claims (1)
1. electric liquid guide control switch valve group; It is characterized in that: constitute by the identical main valve of three structures, three bi-bit bi-pass electromagnetic priority valves and pinboard (1); Three main valves are that liquid-filling valve (I), liquid discharging valve (II), stop valve (III) are installed in the 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 last; Liquid-filling valve (I) is positioned at the left bottom of valve piece (7), and spring chamber is following;
Electromagnetic priority valve is connected with main valve on the valve piece (7) through 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 made up 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) cylindrical embeds piston seal (4), and main valve plug (5) end face embeds plane sealing (6); The piston seal (4) of main valve plug (5) and the excircle part between the plane sealing (6) and valve piece (7) form side chamber (m); Spring chamber (n) is connected with electromagnetic priority valve import separately through the internal duct on the valve piece (7), communicates with water intake and main valve plug (5) side chamber (m) through damping hole 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 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) the 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 |
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| CN 201210228324 CN102748506B (en) | 2012-06-21 | 2012-06-21 | Electro-hydraulic pilot control switch valve bank |
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| CN102748506A true CN102748506A (en) | 2012-10-24 |
| CN102748506B CN102748506B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742673A (en) * | 2014-01-22 | 2014-04-23 | 杭州神林电子有限公司 | Valve |
| CN107542921A (en) * | 2017-08-28 | 2018-01-05 | 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 |
| CN111396526A (en) * | 2013-05-16 | 2020-07-10 | 株式会社艾科赛迪 | Lockup device for torque converter |
| WO2023185475A1 (en) * | 2022-03-31 | 2023-10-05 | 比亚迪股份有限公司 | Flow channel integrated valve and vehicle having same |
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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396526A (en) * | 2013-05-16 | 2020-07-10 | 株式会社艾科赛迪 | Lockup device for torque converter |
| CN111396526B (en) * | 2013-05-16 | 2023-06-27 | 株式会社艾科赛迪 | Lock-up device for torque converter |
| CN103742673A (en) * | 2014-01-22 | 2014-04-23 | 杭州神林电子有限公司 | Valve |
| CN107542921A (en) * | 2017-08-28 | 2018-01-05 | 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 |
| 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 |
| WO2023185475A1 (en) * | 2022-03-31 | 2023-10-05 | 比亚迪股份有限公司 | Flow channel integrated valve and vehicle having same |
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| Publication number | Publication date |
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| CN102748506B (en) | 2013-12-18 |
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