CN108661966A - A kind of plug-in pressure-compensated valve - Google Patents
A kind of plug-in pressure-compensated valve Download PDFInfo
- Publication number
- CN108661966A CN108661966A CN201810588233.6A CN201810588233A CN108661966A CN 108661966 A CN108661966 A CN 108661966A CN 201810588233 A CN201810588233 A CN 201810588233A CN 108661966 A CN108661966 A CN 108661966A
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- installation cavity
- pressure
- flow
- valve
- flow hole
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- 239000012530 fluid Substances 0.000 claims abstract description 61
- 238000009434 installation Methods 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 52
- 208000002925 dental caries Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention relates to a kind of plug-in pressure-compensated valves, it is characterised in that：Including valve body, shuttle valve component, valve pocket, spool, spring base, spring and screw plug, valve body is equipped with first pressure hydraulic fluid port, second pressure hydraulic fluid port, the first installation cavity, the second installation cavity and the first through flow hole, shuttle valve component is mounted in the first installation cavity, valve pocket is equipped with third pressure oil port and the 4th pressure oil port, spool sliding is located in valve pocket, and spring and spring base are located in the second installation cavity and offset with spool.The present invention designs for plug-in, is compact-sized, processing cost is low, can realize pressure compensation.
Description
Technical field
The invention belongs to valve technology field more particularly to a kind of plug-in pressure-compensated valves.
Background technology
Pressure Compensation Technology is very extensive in the application of hydraulic system.In use, working connection is connected to pressure benefit
The oil inlet of valve is repaid, the oil outlet of pressure-compensated valve is connected with the oil inlet of proportional reversing valve, two working oils of proportional reversing valve
The maximum pressure of mouth introduces the spring cavity of pressure-compensated valve, the oil inlet by pressure compensation valve regulation proportional reversing valve and work
The pressure difference of hydraulic fluid port, and then realize that the flow of proportional reversing valve actuator port output is constant unrelated with workload variation.But mesh
Preceding pressure-compensated valve existing in the market, or with the multiple directional control valve of cast form combine by multiple scattered portions
The pressure of the pressure-compensated valve that part is constituted, or the pressure-compensated valve of single board-like connection or superposing type, the above form is mended
Valve is repaid in the presence of the shortcomings of plug-in is integrated, volume is excessive, heavy is not easy to, suitable for application in the hydraulic pressure integrated by inserted valve
In system.
Invention content
A kind of simple in structure, manufacture is provided the technical problem to be solved by the present invention is to present situation for the above-mentioned prior art
It is at low cost, the pressure-compensated valve of the plug-in in inserted valve hydraulic system can be integrated in.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of plug-in pressure-compensated valve, feature
It is：Including valve body, it is inside equipped with the first installation cavity and the second installation cavity in an axial direction, side wall is equipped with and the first installation cavity phase
Logical first pressure hydraulic fluid port and second pressure hydraulic fluid port, first that the first installation cavity of connection and the second installation cavity are additionally provided in valve body are logical
Discharge orifice；Shuttle valve component is set in the first installation cavity and the first installation cavity is divided into first communicated with first pressure hydraulic fluid port and leads to
Chamber, the second through-flow chamber communicated with second pressure hydraulic fluid port and the through-flow chamber of third communicated with the first through flow hole are flowed, on shuttle valve component
Equipped with the first oil inlet communicated with the first through-flow chamber, the second oil inlet communicated with the second through-flow chamber and with the through-flow chamber phase of third
Logical oil outlet；Valve pocket, one end are stretched into the second installation cavity and are formed a fixed connection by baffle ring and valve body, middle part of sliding channel
It is equipped with third pressure oil port, the other end is additionally provided with the 4th pressure oil port in an axial direction；Spool, sliding are located at the endoporus of valve pocket
In, it is inside equipped with the second through flow hole communicated with the 4th pressure oil port in an axial direction, side wall is equipped with and third pressure oil port phase
First through-flow slot of logical annular, is inside radially additionally provided with the third through flow hole of connection the first through-flow slot and the second through flow hole,
What the horizontally slipping of spool can control the first through-flow slot and third pressure oil port is connected to area；Spring base is located at the second peace
In behaveing affectedly, one end of one end and spool offsets；Spring is located in the second installation cavity, and one end is against the another of spring base
End, the other end are against on the bottom surface of the second installation cavity；Screw plug is threadedly connected on valve body and is opened with blocking the first installation cavity
Mouthful.
Preferably, above-mentioned shuttle valve component includes the first valve seat, the second valve seat and steel ball, axial direction is equipped in the second valve seat
Third installation cavity, the second oil inlet radially, the 4th through flow hole and and third for being connected to third installation cavity and the second oil inlet
The oil outlet that installation cavity communicates；First valve seat is fixed in third installation cavity, interior to be equipped with the first oil inlet, installed with third
6th through flow hole of the 5th through flow hole and connection the first oil inlet and the 5th through flow hole that chamber communicates；It is logical that steel ball sliding is located at the 6th
In discharge orifice, the first oil inlet and the 4th through flow hole can be blocked by horizontally slipping.
Preferably, above-mentioned screw plug is equipped with the 7th through flow hole communicated with the first oil inlet, connection is additionally provided on screw plug
8th through flow hole of the first through-flow chamber and the 7th through flow hole.
Compared with the prior art, the advantages of the present invention are as follows：
(1) present invention designs for plug-in, and compact-sized, reasonable, parts are few, at low cost, is convenient for Integration Design.
(2) present invention may be implemented pressure compensation, solve plug-in ratio by the integrated of spool and shuttle valve component
The pressure-compensated valve corresponding problem of example reversal valve, facilitates the proportional flow control with pressure compensation realized and be made of inserted valve
Circuit processed.
Description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is the structure chart of shuttle valve component in the embodiment of the present invention；
Fig. 3 is the hydraulic schematic diagram of the embodiment of the present invention；
Fig. 4 is the embodiment of the present invention using hydraulic schematic diagram.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
As shown in Figures 1 to 3, it is a preferred embodiment of the present invention.
A kind of plug-in pressure-compensated valve, including valve body 1, shuttle valve component 11, valve pocket 7, spool 6, spring base 5,4 and of spring
Screw plug 8.
Valve body 1, is inside equipped with the first installation cavity 101 and the second installation cavity 102 in an axial direction, and side wall is equipped with and the first peace
Behave affectedly the first pressure hydraulic fluid port C and second pressure hydraulic fluid port D that 101 communicate, and the first installation cavity 101 of connection and the are additionally provided in valve body 1
First through flow hole 103 of two installation cavitys 102.
Shuttle valve component 11 is set in the first installation cavity 101 and is divided into the first installation cavity 101 and first pressure hydraulic fluid port C
The the first through-flow chamber 1a communicated, the second through-flow chamber 1b communicated with second pressure hydraulic fluid port D and communicated with the first through flow hole 103
Three-way flow chamber 1c, shuttle valve component 11 are equipped with the first oil inlet 21 communicated with the first through-flow chamber 1a and the second through-flow chamber 1b phases
The second logical oil inlet 31 and the oil outlet 32 communicated with the through-flow chamber 1c of third.Shuttle valve component 11 includes the first valve seat 2, the second valve
Seat 3 and steel ball 9, the 3 interior third installation cavity 24 for being equipped with axial direction of the second valve seat, the second oil inlet 31 radially, connection third peace
Behave affectedly 24 with the 4th through flow hole 33 of the second oil inlet 31 and the oil outlet 32 communicated with third installation cavity 24；First valve seat 2 is solid
Surely be set in third installation cavity 24, in equipped with the first oil inlet 21, the 5th through flow hole 23 that is communicated with third installation cavity 24 and
It is connected to the 6th through flow hole 22 of the first oil inlet 21 and the 5th through flow hole 23；The sliding of steel ball 9 is located in the 6th through flow hole 22, left
Right sliding can block the first oil inlet 21 and the 4th through flow hole 33.
Valve pocket 7, one end are stretched into the second installation cavity 102 and are formed a fixed connection by baffle ring 10 and valve body 1, middle part
Side wall is equipped with third pressure oil port B, and the other end is additionally provided with the 4th pressure oil port A in an axial direction.
Spool 6, sliding are located in the endoporus of valve pocket 7, are inside equipped with second communicated with the 4th pressure oil port A in an axial direction
Through flow hole 61, side wall are equipped with the first through-flow slot 62 of the annular communicated with third pressure oil port B, are inside radially additionally provided with
It is connected to the third through flow hole 63 of the first through-flow slot 62 and the second through flow hole 61, it is through-flow that the horizontally slipping of spool 6 can control first
Slot 62 is connected to area with third pressure oil port B's.
Spring base 5 is located in the second installation cavity 102, and one end and one end of spool 6 offset.
Spring 4 is located in the second installation cavity 102, and one end is against the other end of spring base 5, and the other end is against
On the bottom surface of two installation cavitys 102.
Screw plug 8, be threadedly connected on valve body 1 with block the first installation cavity 101 opening, screw plug 8 be equipped with first into
The 7th through flow hole 82 that hydraulic fluid port 21 communicates, the first through-flow chamber 1a of connection is additionally provided on screw plug 8 with the 7th through flow hole 82 the 8th are led to
Discharge orifice 81.
The operation principle and process of the present invention is as follows：
As shown in figure 4, in practical application, by the present invention plug-in pressure-compensated valve 13 third pressure oil port B with
The outlet of hydraulic pump 12 is connected, and the 4th pressure oil port A is connected with the hydraulic fluid port P of proportional reversing valve 14, first pressure hydraulic fluid port C and ratio
The hydraulic fluid port A1 of reversal valve 14 is connected, and second pressure hydraulic fluid port D is connected with the hydraulic fluid port B1 of proportional reversing valve 14.
If proportional reversing valve 14 is operated in left position, hydraulic fluid port P is communicated with hydraulic fluid port B1, hydraulic fluid port A1 and hydraulic fluid port T-phase are logical, hydraulic pump
The fluid of 12 outlets is pressed through third pressure oil port B, the first through-flow slot 62, third through flow hole 63, the second through flow hole the 61, the 4th successively
The laggard oiler B1 of power hydraulic fluid port A, hydraulic fluid port P, at this time the pressure of hydraulic fluid port B1 be more than hydraulic fluid port A1 pressure；The fluid of hydraulic fluid port B1 is by first
Pressure oil port C is successively through the first through-flow chamber 1a, the 8th through flow hole 81, the 7th through flow hole 82, the first oil inlet 21, the 6th through flow hole
It is applied to after 22 on steel ball 9, pushes steel ball 9 to block the 4th through flow hole 33 to the right, the fluid of hydraulic fluid port B1 is by the 6th through flow hole 22
Enter the after the 5th through flow hole 23, third installation cavity 24, oil outlet 32, third is through-flow chamber 1c, the first through flow hole 103 successively again
Two installation cavitys 102 are applied on spool 6；If the load variation of hydraulic fluid port B1 causes between the 4th pressure oil port A and hydraulic fluid port B1
Pressure difference becomes larger, then spool 6 moves downward under the action of pressure difference, reduces the connection of the first through-flow slot 62 and third pressure oil port B
Area maintains the pressure difference between the 4th pressure oil port A and hydraulic fluid port B1 to be held essentially constant constant, realizes pressure compensated function,
The output flow of hydraulic fluid port B1 can be maintained constant under the premise of proportional reversing valve 14 is open constant；If the load of hydraulic fluid port B1 becomes
Change causes the pressure difference between the 4th pressure oil port A and hydraulic fluid port B1 to become smaller, then spool 6 moves right under the action of pressure difference, increases
The connection area of first through-flow slot 62 and third pressure oil port B, maintains the pressure difference between the 4th pressure oil port A and hydraulic fluid port B1 basic
It keeps constant constant, realizes pressure compensated function, hydraulic fluid port B1 can be maintained under the premise of proportional reversing valve 14 is open constant
Output flow it is constant.
If proportional reversing valve 14 is operated in right position, hydraulic fluid port P is communicated with hydraulic fluid port A1, hydraulic fluid port B1 and hydraulic fluid port T-phase are logical, hydraulic pump
The fluid of 12 outlets is pressed through third pressure oil port B, the first through-flow slot 62, third through flow hole 63, the second through flow hole the 61, the 4th successively
The laggard oiler B1 of power hydraulic fluid port A, hydraulic fluid port P, at this time the pressure of hydraulic fluid port A1 be more than hydraulic fluid port B1 pressure；It is selected by shuttle valve component 11
The pressure of hydraulic fluid port A1 is applied into the second installation cavity 102 on spool 6 afterwards；If the load variation of hydraulic fluid port A1 leads to the 4th pressure
Pressure difference between hydraulic fluid port A and hydraulic fluid port A1 becomes larger, then spool 6 moves downward under the action of pressure difference, reduce the first through-flow slot 62 with
The connection area of third pressure oil port B maintains the pressure difference between the 4th pressure oil port A and hydraulic fluid port A1 to be held essentially constant constant,
It realizes pressure compensated function, can maintain the output flow of hydraulic fluid port A1 permanent under the premise of proportional reversing valve 14 is open constant
It is fixed；If the load variation of hydraulic fluid port A1 causes the pressure difference between the 4th pressure oil port A and hydraulic fluid port A1 to become smaller, then spool 6 is in pressure difference
Under the action of move right, increase the connection area of the first through-flow slot 62 and third pressure oil port B, maintain the 4th pressure oil port A
Pressure difference between hydraulic fluid port B1 is held essentially constant constant, realizes pressure compensated function, is open in proportional reversing valve 14 constant
Under the premise of the output flow of hydraulic fluid port A1 can be maintained constant.
Claims (3)
1. a kind of plug-in pressure-compensated valve, it is characterised in that：Including
Valve body (1), is inside equipped with the first installation cavity (101) and the second installation cavity (102) in an axial direction, and side wall is equipped with and first
The first pressure hydraulic fluid port (C) and second pressure hydraulic fluid port (D) that installation cavity (101) communicates, valve body (1) is interior to be additionally provided with the first installation of connection
The first through flow hole (103) of chamber (101) and the second installation cavity (102)；
Shuttle valve component (11) is set in the first installation cavity (101) and is divided into the first installation cavity (101) and first pressure hydraulic fluid port
(C) the first through-flow chamber (1a) for communicating, the second through-flow chamber (1b) communicated with second pressure hydraulic fluid port (D) and with the first through flow hole
(103) the through-flow chamber of third (1c) communicated, shuttle valve component (11) are equipped with the first oil inlet communicated with the first through-flow chamber (1a)
(21), the second oil inlet (31) communicated with the second through-flow chamber (1b) and the oil outlet (32) communicated with the through-flow chamber of third (1c)；
Valve pocket (7), one end are stretched into the second installation cavity (102) and are formed a fixed connection by baffle ring (10) and valve body (1),
Middle part of sliding channel is equipped with third pressure oil port (B), and the other end is additionally provided with the 4th pressure oil port (A) in an axial direction；
Spool (6), sliding are located in the endoporus of valve pocket (7), are inside equipped with the communicated with the 4th pressure oil port (A) in an axial direction
Two through flow holes (61), side wall is equipped with the first through-flow slot (62) of the annular communicated with third pressure oil port (B), interior along diameter
To the third through flow hole (63) for being additionally provided with the first through-flow slot (62) and the second through flow hole (61) of connection, spool (6) horizontally slip
The first through-flow slot (62) and third pressure oil port (B) can be controlled is connected to area；
Spring base (5) is located in the second installation cavity (102), and one end and the one end of spool (6) offset；
Spring (4) is located in the second installation cavity (102), and one end is against the other end of spring base (5), and the other end is against
On the bottom surface of second installation cavity (102)；
Screw plug (8) is threadedly connected on valve body (1) and is open with blocking the first installation cavity (101).
2. a kind of plug-in pressure-compensated valve according to claim 1, it is characterised in that：The shuttle valve component (11) includes
First valve seat (2), the second valve seat (3) and steel ball (9) are equipped with axial third installation cavity (24), radially in the second valve seat (3)
The second oil inlet (31), connection third installation cavity (24) pacifies with the 4th through flow hole (33) of the second oil inlet (31) and with third
It behave affectedly the oil outlet (32) that (24) communicate；First valve seat (2) is fixed in third installation cavity (24), interior to be equipped with the first oil inlet
Mouth (21), the 5th through flow hole (23) communicated with third installation cavity (24) and the first oil inlet of connection (21) and the 5th through flow hole
(23) the 6th through flow hole (22)；Steel ball (9) sliding is located in the 6th through flow hole (22), and the first oil inlet can be blocked by horizontally slipping
Mouth (21) and the 4th through flow hole (33).
3. a kind of plug-in pressure-compensated valve according to claim 2, it is characterised in that：The screw plug (8) be equipped with
The 7th through flow hole (82) that first oil inlet (21) communicates is additionally provided with the first through-flow chamber (1a) of connection and the 7th logical on screw plug (8)
8th through flow hole (81) of discharge orifice (82).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911288679.8A CN111022403B (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
| CN201911275400.2A CN110905880B8 (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve and valve core of cartridge valve hydraulic system |
| CN201810588233.6A CN108661966B (en) | 2018-06-08 | 2018-06-08 | Plug-in type pressure compensation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810588233.6A CN108661966B (en) | 2018-06-08 | 2018-06-08 | Plug-in type pressure compensation valve |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911288679.8A Division CN111022403B (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
| CN201911275400.2A Division CN110905880B8 (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve and valve core of cartridge valve hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108661966A true CN108661966A (en) | 2018-10-16 |
| CN108661966B CN108661966B (en) | 2019-12-20 |
Family
ID=63775340
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911275400.2A Active CN110905880B8 (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve and valve core of cartridge valve hydraulic system |
| CN201911288679.8A Active CN111022403B (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
| CN201810588233.6A Active CN108661966B (en) | 2018-06-08 | 2018-06-08 | Plug-in type pressure compensation valve |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911275400.2A Active CN110905880B8 (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve and valve core of cartridge valve hydraulic system |
| CN201911288679.8A Active CN111022403B (en) | 2018-06-08 | 2018-06-08 | Pressure compensation valve capable of being integrated in cartridge valve hydraulic system and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN110905880B8 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771950A (en) * | 2021-03-30 | 2023-09-19 | 陕西华诚领航电磁科技有限责任公司 | Proportional solenoid valve and pressure regulating device therein |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29509213U1 (en) * | 1995-03-24 | 1996-07-25 | Orenstein & Koppel Ag | Device for flow pressure-independent flow distribution in a spool for mobile construction and work machines |
| CN101922477A (en) * | 2009-06-09 | 2010-12-22 | 上海立新液压有限公司 | Pressure-compensated valve |
| CN102094863A (en) * | 2010-12-30 | 2011-06-15 | 江苏国瑞液压机械有限公司 | Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode |
| CN203081879U (en) * | 2013-02-21 | 2013-07-24 | 中联重科股份有限公司 | Hydraulic control loop |
| CN104265715A (en) * | 2014-10-16 | 2015-01-07 | 江苏恒立液压有限公司 | Pressure compensating valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2270467B1 (en) * | 1974-03-29 | 1977-09-30 | Mercier Bernard | |
| ZA771041B (en) * | 1976-05-06 | 1977-12-28 | Commercial Shearing | Control valves |
| JP2557000B2 (en) * | 1990-05-15 | 1996-11-27 | 株式会社小松製作所 | Control valve device |
| CN102434519B (en) * | 2011-11-29 | 2014-10-15 | 三一汽车起重机械有限公司 | Engineering machine and flow distributing and converging hydraulic control system thereof |
| CN202579417U (en) * | 2012-06-06 | 2012-12-05 | 常德中联重科液压有限公司 | Hydraulic circuit |
| CN103216477B (en) * | 2013-04-28 | 2016-03-16 | 贵州大学 | A kind of metering pump pressure compensating method of single-power hydraulic power and device |
| CN105443480B (en) * | 2014-08-12 | 2017-09-08 | 徐工集团工程机械股份有限公司 | Work connection valve body structure and proportional multi-way valve |
| CN205533507U (en) * | 2016-04-22 | 2016-08-31 | 青神格林维尔流体动力控制技术有限公司 | Take pressure compensation's hydraulic pressure proportional valve piece |
-
2018
- 2018-06-08 CN CN201911275400.2A patent/CN110905880B8/en active Active
- 2018-06-08 CN CN201911288679.8A patent/CN111022403B/en active Active
- 2018-06-08 CN CN201810588233.6A patent/CN108661966B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29509213U1 (en) * | 1995-03-24 | 1996-07-25 | Orenstein & Koppel Ag | Device for flow pressure-independent flow distribution in a spool for mobile construction and work machines |
| CN101922477A (en) * | 2009-06-09 | 2010-12-22 | 上海立新液压有限公司 | Pressure-compensated valve |
| CN102094863A (en) * | 2010-12-30 | 2011-06-15 | 江苏国瑞液压机械有限公司 | Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode |
| CN203081879U (en) * | 2013-02-21 | 2013-07-24 | 中联重科股份有限公司 | Hydraulic control loop |
| CN104265715A (en) * | 2014-10-16 | 2015-01-07 | 江苏恒立液压有限公司 | Pressure compensating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110905880A (en) | 2020-03-24 |
| CN111022403B (en) | 2021-10-26 |
| CN110905880B (en) | 2021-12-03 |
| CN111022403A (en) | 2020-04-17 |
| CN110905880B8 (en) | 2021-12-31 |
| CN108661966B (en) | 2019-12-20 |
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