CN205533507U - Take pressure compensation's hydraulic pressure proportional valve piece - Google Patents
Take pressure compensation's hydraulic pressure proportional valve piece Download PDFInfo
- Publication number
- CN205533507U CN205533507U CN201620343332.4U CN201620343332U CN205533507U CN 205533507 U CN205533507 U CN 205533507U CN 201620343332 U CN201620343332 U CN 201620343332U CN 205533507 U CN205533507 U CN 205533507U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- oil
- compensated
- 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
Links
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
The utility model relates to a take pressure compensation's hydraulic pressure proportional valve piece, it includes valve body (1), pressure -compensated valve (2), flow control valve (3), ratio pressure reducing valve (4) and definite value relief pressure valve (5), valve body (1) on be provided with a plurality of installation slotted holes, pressure -compensated valve (2), flow control valve (3), that mounting groove corresponding on valve body (1) is installed respectively in ratio pressure reducing valve (4) and definite value relief pressure valve (5) is downthehole, valve body (1) on still be provided with oil inlet (6), oil -out (7) and low pressure oil return opening (8). The utility model has the advantages of compact structure, processing technology is simple, the processing cost is low.
Description
Technical field
This utility model relates to hydraulic valve technical field, the particularly pressure compensated hydraulic proportion valve block of a kind of band.
Background technology
Flow valve is a kind of common Hydraulic Elements, is widely used in needing to carry out in the water system of flow-control.In recent years, in order to improve the control accuracy of hydraulic operating system, improving the service behaviour performing machinery, increasing machinery begins with hydraulic proportional flow control valve.But, the valve body internal passage of currently used proportional flow control valve is to be formed by cast casting mostly, and its difficulty of processing is bigger, needs lathe costly and hone machine to process, and processing technique is complicated, and processing cost is high.
Utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, it is provided that the band pressure compensated hydraulic proportion valve block that a kind of compact conformation, processing technique are simple, processing cost is low.
The purpose of this utility model is achieved through the following technical solutions: the pressure compensated hydraulic proportion valve block of a kind of band, it includes valve body, pressure-compensated valve, flow control valve, proportional pressure-reducing valve and fixed pressure reducing valve, multiple installation slotted eye it is provided with on described valve body, described pressure-compensated valve, flow control valve, proportional pressure-reducing valve and fixed pressure reducing valve is separately mounted on valve body install in slotted eye accordingly, and described valve body is additionally provided with oil-in, oil-out and low pressure oil return opening；Described oil-in is connected with pressure-compensated valve, flow control valve and oil-out successively by oil circuit A, described pressure-compensated valve is connected with flow control valve and oil circuit A by oil circuit B and oil circuit C the most respectively, oil circuit D it is also associated with on oil circuit between described oil-in and pressure-compensated valve, the other end of described oil circuit D connects with fixed pressure reducing valve, described flow control valve all connects with proportional pressure-reducing valve with fixed pressure reducing valve, and described flow control valve, proportional pressure-reducing valve and fixed pressure reducing valve all connect with low pressure oil return opening.Pressure-compensated valve, flow control valve, proportional pressure-reducing valve and fixed pressure reducing valve are inserted valve.
Preferably, described pressure-compensated valve includes spring cup A, spring A, spool A and valve pocket A, in described spring cup A and valve pocket A all coordinates the installation slotted eye being arranged on valve body, in described spool A coordinates the cavity being arranged on valve pocket A, it is provided with spring cavity A on described spring cup A, described spring A is arranged in spring cavity A, it is provided with valve core channel A in described spool A, it is provided with between valve pocket hole A and restriction A, and valve pocket A and valve body on described valve pocket A and is provided with circular passage A and circular passage C.
Preferably, described flow control valve includes spring cup B, spring B, spool B and valve pocket B, in described spring cup B and valve pocket B all coordinates the installation slotted eye being arranged on valve body, in described spool B coordinates the cavity being arranged on valve pocket B, it is provided with spring cavity B on described spring cup B, described spring B is arranged in spring cavity B, it is provided with valve core channel B in described spool B, it is provided with between valve pocket hole B and restriction B, and valve pocket B and valve body on described valve pocket B and is provided with circular passage B and oil pocket B.Fluid in spring cavity B communicates with the fluid in valve core channel B, valve pocket hole B, oil pocket B and low pressure oil return opening successively, to guarantee that spring cavity B does not produce back pressure.
Preferably, described oil circuit C is provided with impedance screw.
Preferably, described oil circuit A includes oil inlet passage A and connects oil circuit.The fluid come in from oil-in sequentially passes through the oil inlet passage A of pressure-compensated valve, circular passage C, the oil pocket A of pressure-compensated valve is entered again after restriction A carries out pressure compensation, enter the oil suction chamber of flow control valve the most again through connecting oil circuit, after restriction B throttles, flow through circular passage B and flow out from oil-out.Connect oil circuit by hole and plug formed, the unlatching size of restriction B is directly proportional to the input current of proportional pressure-reducing valve.
Pressure-compensated valve is used for pressure compensation, when valve block in use, load pressure may often be such that variation, and the purpose using pressure-compensated valve is no matter how load pressure changes, and pressure differential before and after the restriction B of flow control valve can be allowed to keep constant value.So, the interference that the characteristic of flow control valve would not be changed by load.In work process, the pressure oil in spring cavity A enters circular passage A by valve core channel A, valve pocket hole A, then connects with the circular passage B and oil-out B of flow control valve through oil circuit B, and oil circuit B is made up of two vertical borings, and each drill hole is provided with plug；Oil pocket C on pressure-compensated valve is connected by impedance screw with oil circuit C, and oil circuit C is made up of two vertical borings, and the end of boring is provided with plug, and wherein a boring connects with oil circuit A, and oil circuit A is communicated on the oil inlet passage B of flow control valve.So, the pressure differential at spool A two ends spring force with spring A the most all the time balances each other, and the most just makes the pressure differential of the turnover oil of the restriction B of flow control valve become constant value.
The oil-feed of proportional pressure-reducing valve is it is necessary to have the stable oil sources of low pressure, and its oil sources is provided to proportional pressure-reducing valve by oil circuit E by the output pressure chamber of fixed pressure reducing valve, and oil circuit E is made up of two vertical borings, and the end of boring is provided with plug.
The operation principle of proportioning valve block is as follows: the control pressure balance that the spring force that spring B produces produces in controlling pressure oil cavity with proportional pressure-reducing valve.Due to the spring force of spring B relation proportional to the displacement of spool B, thus cause the control pressure relation the most proportional to the displacement of spool B controlling pressure oil cavity.If the flow area of design restriction B and the spool proportional relation of B displacement, then, under certain pressure drop, would control the control pressure just relation proportional to output flow of pressure oil cavity.Because the output pressure of proportional pressure-reducing valve is exactly the pressure controlling pressure oil cavity, and the electric current that the output pressure of proportional pressure-reducing valve inputs to it is directly proportional, therefore, the output flow of valve block relation proportional to the output flow of proportional pressure-reducing valve.
This utility model has the advantage that
1, compact conformation, processing technique is simple, processing cost is low: pressure-compensated valve, flow control valve, proportional pressure-reducing valve and fixed pressure reducing valve in this utility model are inserted valve, valve body is with shape extrusion, in the case of fully meeting requirement on machining accuracy, reduce difficulty of processing, it is to avoid use the problems that casting brings；
2, pressure compensation valve compensation pressure is used, avoid flow control valve to be subject to load the interference changed: when valve block in use, load pressure may often be such that variation, this utility model is designed with pressure-compensated valve, no matter how load pressure changes, pressure differential before and after the restriction B of flow control valve can be allowed to keep constant value, so, the interference that the characteristic of flow control valve would not be changed by load.
3, the spring cavity B of flow control valve is connected with low pressure oil return opening by inner passage, can effectively guarantee that spring cavity B does not produce back pressure.
Accompanying drawing explanation
Fig. 1 is the perspective view of perspective view of the present utility model；
Fig. 2 is sectional view of the present utility model；
nullIn figure: 1-valve body，2-pressure-compensated valve，21-spring cup A，22-spring A，23-spool A，24-valve pocket A，25-spring cavity A，26-valve core channel A，27-valve pocket hole A，28-restriction A，29-circular passage A，210-circular passage C，211-oil pocket A，212-oil pocket C，3-flow control valve，31-spring cup B，32-spring B，33-spool B，34-valve pocket B，35-spring cavity B，36-valve core channel B，37-valve pocket hole B，38-restriction B，39-circular passage B，310-oil pocket B，311-oil inlet passage B，312-controls pressure oil cavity，4-proportional pressure-reducing valve，5-fixed pressure reducing valve，51-output pressure chamber，6-oil-in，7-oil-out，8-low pressure oil return opening，9-oil circuit A，91-oil inlet passage A，92-connects oil circuit，10-oil circuit B，11-oil circuit C，12-impedance screw，13-oil circuit D，14-oil circuit E.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described, but protection domain of the present utility model is not limited to the following stated.
As depicted in figs. 1 and 2, the pressure compensated hydraulic proportion valve block of a kind of band, it includes valve body 1, pressure-compensated valve 2, flow control valve 3, proportional pressure-reducing valve 4 and fixed pressure reducing valve 5.Described pressure-compensated valve 2, flow control valve 3, proportional pressure-reducing valve 4 and fixed pressure reducing valve 5 are inserted valve, multiple installation slotted eye it is provided with on valve body 1, pressure-compensated valve 2 and flow control valve 3 are arranged in the installation slotted eye on valve body 1, proportional pressure-reducing valve 4 is arranged in the installation slotted eye on the right side of valve body 1, and fixed pressure reducing valve 5 is arranged in the installation slotted eye bottom valve body 1；The left side of valve body 1 arranges oil-in 6 and low pressure oil return opening 8, and the right side of valve body 1 is provided with oil-out 7.
Described pressure-compensated valve 2 includes spring cup A21, spring A22, spool A23 and valve pocket A24.In described spring cup A21 and valve pocket A24 all coordinates the installation slotted eye being arranged on valve body 1 top, in described spool A23 coordinates the cavity being arranged on valve pocket A24, it is provided with spring cavity A25 on described spring cup A21, described spring A22 is arranged in spring cavity A25, it is provided with valve core channel A26 in described spool A23, it is provided with between valve pocket hole A27 and restriction A28, and valve pocket A24 and valve body 1 on described valve pocket A24 and is provided with circular passage A29 and circular passage C210.
Described flow control valve 3 includes spring cup B31, spring B 32, spool B33 and valve pocket B34.In described spring cup B31 and valve pocket B34 all coordinates the installation slotted eye being arranged on valve body 1 top, in described spool B33 coordinates the cavity being arranged on valve pocket B34, it is provided with spring cavity B35 on described spring cup B31, described spring B 32 is arranged in spring cavity B35, it is provided with valve core channel B36 in described spool B33, it is provided with between valve pocket hole B37 and restriction B38, and valve pocket B34 and valve body 1 on described valve pocket B34 and is provided with circular passage B39 and oil pocket B310.The spring cavity B35 of flow control valve 3 is connected to low pressure oil return opening 8 by inner passage, to guarantee that spring cavity B35 does not produce back pressure.It is as follows that it specifically connects form: the fluid in spring cavity B35 communicates with the fluid in valve core channel B36, valve pocket hole B37, oil pocket B310 and low pressure oil return opening 8 successively.The other end of flow control valve 3 is connected to the control port of proportional pressure-reducing valve 4.
Described oil-in 6 is connected with pressure-compensated valve 2, flow control valve 3 and oil-out 7 successively by oil circuit A9, and oil circuit A9 includes oil inlet passage A91 and connects oil circuit 92, connects oil circuit 92 and is formed by boring and plug.It is as follows that it specifically connects form: the fluid come in from oil-in 6 sequentially passes through the oil inlet passage A91 of pressure-compensated valve 2, circular passage C210, the oil pocket A211 of pressure-compensated valve 2 is entered again after restriction A28 carries out pressure compensation, enter the oil suction chamber 311 of flow control valve 3 the most again through connecting oil circuit 92, after restriction B38 throttles, flow through circular passage B39 and flow out from oil-out 7.The unlatching size of restriction B38 is directly proportional to the input current of proportional pressure-reducing valve 4.
Pressure-compensated valve 2 for pressure compensation, when valve block in use, load pressure may often be such that variation, and the purpose using pressure-compensated valve 2 is no matter how load pressure changes, and pressure differential before and after the restriction B38 of flow control valve 3 can be allowed to keep constant value；So, the interference that the characteristic of flow control valve 3 would not be changed by load.It is as follows that it implements principle: on the one hand, pressure-compensated valve 2 is connected with flow control valve 3 by oil circuit B10, pressure oil in i.e. spring cavity A25 enters circular passage A29 by valve core channel A26, valve pocket hole A27, connect with the circular passage B39 and oil-out B7 of flow control valve 3 through oil circuit B10 again, oil circuit B10 is made up of two vertical borings, and each drill hole is provided with plug；On the other hand, pressure-compensated valve 2 connects with oil circuit A9 also by the loop, driving chamber (i.e. oil circuit C11) of spool A23, equipped with impedance screw 12 on oil circuit C11, oil circuit C11 is made up of two vertical borings, the end of boring is provided with plug, wherein a boring connects with oil circuit A9, and oil circuit A9 is communicated on the oil inlet passage B311 of flow control valve 3.So, the pressure differential at spool A23 two ends spring force with spring A22 the most all the time balances each other, and the most just makes the pressure differential of the turnover oil of the restriction B38 of flow control valve 3 become constant value.
The oil-feed of proportional pressure-reducing valve 4 is it is necessary to have the stable oil sources of low pressure, and described fixed pressure reducing valve 5 connects with proportional pressure-reducing valve 4 for supplying oil sources to it.Its concrete mode of communicating is as follows: the output pressure chamber 51 of fixed pressure reducing valve 5 provides pressure oil-source by oil circuit E14 to proportional pressure-reducing valve 4, and oil circuit E14 is made up of two vertical borings, and the end of boring is provided with plug.
Additionally, be also associated with oil circuit D13 on oil circuit between described oil-in 6 and pressure-compensated valve 2, the other end of described oil circuit D13 connects with fixed pressure reducing valve 5；The control pressure oil cavity 312 of described flow control valve 3 connects with proportional pressure-reducing valve 4, and described proportional pressure-reducing valve 4 all connects with low pressure oil return opening 8 with fixed pressure reducing valve 5.
The operation principle of proportioning valve block of the present utility model is as follows: the control pressure balance that the spring force that spring B 32 produces produces in controlling pressure oil cavity 312 with proportional pressure-reducing valve 4.Due to the spring force of spring B 32 relation proportional to the displacement of spool B33, thus cause the control pressure relation the most proportional to the displacement of spool B33 controlling pressure oil cavity 312.During use, the flow area of design restriction B38 and the spool proportional relation of B33 displacement, then, under certain pressure drop, control the control pressure just relation proportional to output flow of pressure oil cavity 312.Because the output pressure of proportional pressure-reducing valve 4 is exactly the pressure controlling pressure oil cavity 312, and the electric current that the output pressure of proportional pressure-reducing valve 4 inputs to it is directly proportional, therefore, the output flow of proportioning valve block relation proportional to the output flow of proportional pressure-reducing valve 4.
Claims (4)
1. one kind carries pressure compensated hydraulic proportion valve block, it is characterised in that:
It includes valve body (1), pressure-compensated valve (2), flow control valve (3), proportional pressure-reducing valve (4) and fixed pressure reducing valve (5), it is provided with multiple installation slotted eye on described valve body (1), described pressure-compensated valve (2), flow control valve (3), proportional pressure-reducing valve (4) and fixed pressure reducing valve (5) is separately mounted in the upper corresponding installation slotted eye of valve body (1), and described valve body (1) is additionally provided with oil-in (6), oil-out (7) and low pressure oil return opening (8)；
Described oil-in (6) pass through oil circuit A(9) successively with pressure-compensated valve (2), flow control valve (3) connects with oil-out (7), described pressure-compensated valve (2) is the most respectively by oil circuit B(10) with oil circuit C(11) with flow control valve (3) and oil circuit A(9) connect, it is also associated with oil circuit D(13) on oil circuit between described oil-in (6) and pressure-compensated valve (2), described oil circuit D(13) the other end connect with fixed pressure reducing valve (5), described flow control valve (3) all connects with proportional pressure-reducing valve (4) with fixed pressure reducing valve (5), described flow control valve (3), proportional pressure-reducing valve (4) all connects with low pressure oil return opening (8) with fixed pressure reducing valve (5).
nullThe pressure compensated hydraulic proportion valve block of a kind of band the most according to claim 1，It is characterized in that: described pressure-compensated valve (2) includes spring cup A(21)、Spring A(22)、Spool A(23) and valve pocket A(24)，Described spring cup A(21) and valve pocket A(24) all coordinate and be arranged in the installation slotted eye of valve body (1)，Described spool A(23) coordinate be arranged on valve pocket A(24) cavity in，Described spring cup A(21) on be provided with spring cavity A(25)，Described spring A(22) it is arranged on spring cavity A(25) in，Described spool A(23) in be provided with valve core channel A(26)，Described valve pocket A(24) on be provided with valve pocket hole A(27) and restriction A(28)，And valve pocket A(24) and valve body (1) between be provided with circular passage A(29) and circular passage C(210).
nullThe pressure compensated hydraulic proportion valve block of a kind of band the most according to claim 1，It is characterized in that: described flow control valve (3) includes spring cup B(31)、Spring B (32)、Spool B(33) and valve pocket B(34)，Described spring cup B(31) and valve pocket B(34) all coordinate and be arranged in the installation slotted eye of valve body (1)，Described spool B(33) coordinate be arranged on valve pocket B(34) cavity in，Described spring cup B(31) on be provided with spring cavity B(35)，Described spring B (32) is arranged on spring cavity B(35) in，Described spool B(33) in be provided with valve core channel B(36)，Described valve pocket B(34) on be provided with valve pocket hole B(37) and restriction B(38)，And valve pocket B(34) and valve body (1) between be provided with circular passage B(39) and oil pocket B(310).
The pressure compensated hydraulic proportion valve block of a kind of band the most according to claim 1, it is characterised in that: it is provided with impedance screw (12) on described oil circuit C(11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620343332.4U CN205533507U (en) | 2016-04-22 | 2016-04-22 | Take pressure compensation's hydraulic pressure proportional valve piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620343332.4U CN205533507U (en) | 2016-04-22 | 2016-04-22 | Take pressure compensation's hydraulic pressure proportional valve piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205533507U true CN205533507U (en) | 2016-08-31 |
Family
ID=56797027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620343332.4U Expired - Fee Related CN205533507U (en) | 2016-04-22 | 2016-04-22 | Take pressure compensation's hydraulic pressure proportional valve piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205533507U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757028A (en) * | 2016-04-22 | 2016-07-13 | 青神格林维尔流体动力控制技术有限公司 | Hydraulic proportional valve block with pressure compensation function |
| CN108087366A (en) * | 2018-01-25 | 2018-05-29 | 陈艳艳 | A kind of flow divider valve for single-pump system |
| CN111022403A (en) * | 2018-06-08 | 2020-04-17 | 张玲花 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
| CN112780625A (en) * | 2021-01-25 | 2021-05-11 | 南京机电职业技术学院 | Flow control valve with pressure compensation and high-precision flow control method |
-
2016
- 2016-04-22 CN CN201620343332.4U patent/CN205533507U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757028A (en) * | 2016-04-22 | 2016-07-13 | 青神格林维尔流体动力控制技术有限公司 | Hydraulic proportional valve block with pressure compensation function |
| CN108087366A (en) * | 2018-01-25 | 2018-05-29 | 陈艳艳 | A kind of flow divider valve for single-pump system |
| CN108087366B (en) * | 2018-01-25 | 2019-07-19 | 武汉嘉仕德机电设备有限公司 | A kind of flow divider valve for single-pump system |
| CN111022403A (en) * | 2018-06-08 | 2020-04-17 | 张玲花 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
| CN112780625A (en) * | 2021-01-25 | 2021-05-11 | 南京机电职业技术学院 | Flow control valve with pressure compensation and high-precision flow control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205533507U (en) | Take pressure compensation's hydraulic pressure proportional valve piece | |
| CN202673874U (en) | Constant-pressure variable control system of load sensitive hydraulic pump | |
| CN104196803A (en) | Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter | |
| CN104989690B (en) | Overload relief valve | |
| CN105090600A (en) | Novel electric-hydraulic proportional overflow valve | |
| CN105757028A (en) | Hydraulic proportional valve block with pressure compensation function | |
| CN204099323U (en) | Proportional multi-way valve, jib hydraulic control system and concrete mixer | |
| CN205064924U (en) | Control valve, multiple unit valve and fork truck | |
| CN201972916U (en) | Constant-pressure control valve for axial plunger piston pump | |
| CN106224315A (en) | Total power self-adaptation type load-sensitive multiple directional control valve | |
| CN205938031U (en) | Piston type double directional pressure relief valve with adjustable | |
| CN103470561B (en) | A kind of proportional pressure control valve | |
| CN104235450A (en) | Pressure closed loop control digital integrated direct acting type proportional overflow valve | |
| CN204083373U (en) | A kind of multi-way valve with off-load protection | |
| CN102865395B (en) | Inserted pressure regulating valve | |
| CN204113788U (en) | The Embedded shunting relief valve of a kind of shuttle valve | |
| CN110905880B (en) | Pressure compensation valve and valve core of cartridge valve hydraulic system | |
| CN201896806U (en) | Superposed type balance valve | |
| CN208311160U (en) | A kind of excavator load sensitive system | |
| CN108005973A (en) | A kind of excavator load sensitive system and its energy-saving control method | |
| CN203822732U (en) | Pilot oil source control block | |
| CN102889258B (en) | Pressure compensation valve and engineering machinery | |
| CN110388343B (en) | High-flow single-channel double-overflow three-way pressure compensator | |
| CN205423375U (en) | Manual flow control valve structure of balanced type | |
| CN204226318U (en) | A kind of hydrovalve and crane hydraulic system with pressure enlarging function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20180422 |