CN207750316U - Control valve group for the output of quantitative system flow proportional - Google Patents
Control valve group for the output of quantitative system flow proportional Download PDFInfo
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- CN207750316U CN207750316U CN201820020644.0U CN201820020644U CN207750316U CN 207750316 U CN207750316 U CN 207750316U CN 201820020644 U CN201820020644 U CN 201820020644U CN 207750316 U CN207750316 U CN 207750316U
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- valve
- control valve
- proportional
- working holes
- flow
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- 239000012530 fluid Substances 0.000 claims abstract description 39
- 230000008676 import Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 24
- 230000033001 locomotion Effects 0.000 description 12
- 239000000725 suspension Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
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Abstract
The utility model is related to hydraulic techniques, more particularly to a kind of control valve group for the output of quantitative system flow proportional, include operated proportional flow control valve, proportional reversing valve, pressure compensator, permanent flow valve, check valve and P hydraulic fluid ports, T hydraulic fluid ports, A1 working holes, A2 working holes, B1 working holes, B2 working holes.The utility model executing agency speed displacement accurately controls, and executing agency can composite move：Four operated proportional flow control valve oil inlet parallel connection oil inlets can be such that multiple executing agencies work at the same time, complete composite move, do not influenced by load pressure by adjusting each operated proportional flow control valve valve port size.
Description
Technical field
The present invention relates to hydraulic technique more particularly to a kind of control valve groups for the output of quantitative system flow proportional.
Background technology
In Practical Project machinery or industrial hydraulic system, in order to accurately control output flow, load-sensitive change is mostly used greatly
Amount system, but this system cost is higher, use condition is harsh, and debugging is difficult.And quantitatively system price is cheap, maintenance side
Just, by extensive use, but its control mode passes through regulating valve stem throttling channel aperture, control mainly using by-pass throttle
Output flow.But this control mode is influenced obviously by load variation, and executing agency accurately controls difficulty.
Invention content
In view of the above-mentioned problems, the goal of the invention of the present invention be to provide it is a kind of it is at low cost, flow control accuracy is high is used for
The control valve group of quantitative system flow proportional output.
To achieve the above object of the invention, the technical scheme is that：It is a kind of to be used for what quantitative system flow proportional exported
Control valve group comprising proportional flow control valve, proportional reversing valve, pressure compensator, permanent flow valve, check valve and P hydraulic fluid ports,
T hydraulic fluid ports, A1 working holes, A2 working holes, B1 working holes, B2 working holes；
The P hydraulic fluid ports are respectively communicated with the import of operated proportional flow control valve, pressure compensator, and operated proportional flow control valve goes out
Mouth is respectively through check valve connection A1 working holes, A2 working holes, B1 working holes, B2 working holes, A1 working holes, A2 working holes, B1 works
Make mouth, B2 working holes to be connected to T hydraulic fluid ports through proportional reversing valve respectively, the spring cavity of pressure compensator and the inlet communication of permanent flow valve
The load signal for taking operated proportional flow control valve to export afterwards；Pressure compensator is connected to the outlet of permanent flow valve with T hydraulic fluid ports, P hydraulic fluid ports and T
Overflow valve is equipped between hydraulic fluid port.
Preferably, the check valve between the operated proportional flow control valve outlet and working hole, which is load, keeps check valve.
Preferably, being equipped with damping hole between the permanent flow valve import and pressure compensator spring cavity.
Preferably, after the inlet communication of the pressure compensator and permanent flow valve, proportional flow control is taken by unidirectional valve group
The outlet load signal of valve.
Preferably, after the inlet communication of the pressure compensator and permanent flow valve, operated proportional flow control valve is taken by shuttle valve group
Outlet load signal.
The beneficial effects of the present invention are：
（1）Executing agency's speed displacement accurately controls：By controlling the input signal of operated proportional flow control valve, realizes and execute
The movement velocity displacement of mechanism accurately controls, and is performed simultaneously mechanism kinematic speed not by workload pressure influence.
（2）Executing agency can composite move：Four operated proportional flow control valve oil inlet parallel connection oil inlets, by adjusting each ratio
Example flow control valve valve port size, can be such that multiple executing agencies work at the same time, and complete composite move, do not influenced by load pressure.
（3）Low-pressure load discharge：After executing agency completes movement, the fluid of pressure compensator control spring cavity is returned by permanent flow valve
Fuel tank so that system fluid keeps system more energy saving by pressure compensator Low-pressure load discharge.
（4）Accurately controlling for output flow is realized with quantitative system, is not influenced by load variation, whole system cost
Low, easy to maintain, use scope is extensive.
Description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present invention one；
Fig. 2 is the schematic diagram of the embodiment of the present invention two；
Fig. 3 is that the present invention is applied to agricultural machinery suspension and leveling system schematic diagram.
Description of symbols in figure：
101- operated proportional flow control valves I, 102- operated proportional flow control valve II, 103- operated proportional flow control valve III, 104- ratio
Example flow control valve IV, 105- overflow valve, 106- pressure compensators, 107- permanent flow valves, 108- proportional reversing valves, 109- check valves
I, 110- check valve II, 111- electric-control stop valve, 112- check valves III, 113- check valve IV, 114- electric-control stop valve, 115-
Check valve V, 116- check valve VI, 117- proportional reversing valve, 118- check valves VII, 119- check valve VIII；120- shuttle valve I,
121- shuttle valves II, 122- shuttle valve III and A1 hydraulic fluid port, A2 hydraulic fluid ports, B1 hydraulic fluid ports, B2 hydraulic fluid ports, T hydraulic fluid ports, P2 hydraulic fluid ports；
1- flow proportional output control valve group I, 2- high pressure filters, 3- hydraulic gear pumps, 4- oil absorption filters, 5- liquid levels
Liquid thermometer, 6- hydraulic air filters, 7- hydraulic oil containers, 8- work switching valve groups, 9- quick-release connectors, 10- clutch for clutch control valves,
11- hydraulic clutches, 12- accumulators, 13- quick-release connectors, 14- flow proportional output control valve group II, 15- vehicle bodies supporting leg oil
Cylinder, 16- shut-off valves, the emergent manual operation valve groups of 17-, the right lift cylinder of 18- suspension, the left lift cylinder of 19- suspension.
Specific implementation mode
To further understand the present invention, technical scheme of the present invention is done into one with reference to the accompanying drawings and detailed description
Step explanation, referring to Fig. 1, Fig. 2.
In the present embodiment, as shown in Figure 1, the P2 hydraulic fluid ports of flow proportional output control valve group are separately connected four ratio streams
The import of control valve 101/102/103/104, the import of overflow valve 105 and the import of pressure compensator 106；Proportional flow control
The outlet of valve 101 processed is connected through check valve 119 and 117 import of proportional reversing valve and A1 hydraulic fluid ports, and operated proportional flow control valve 102 goes out
Mouth is connected through check valve 116 and 114 import of electric-control stop valve and B1 hydraulic fluid ports, and proportional reversing valve 117 goes out with electric-control stop valve 114
Mouth is connected to T1 mouthfuls；The connection type of operated proportional flow control valve 103 and operated proportional flow control valve 104 is similar with front；Four ratios
Hydraulic control of the outlet through check valve 109/112/115/118 Yu pressure compensator 106 of example flow control valve 101/102/103/104
Chamber is connected with 107 entrance of permanent flow valve, and 106 outlets of pressure compensator are connected with the outlet of permanent flow valve 106 in T1 mouthfuls.
By taking the present invention is applied to agricultural machinery suspension and leveling system as an example, as shown in Fig. 2, the gear pump 3 of quantitative system passes through
High pressure filter 2 connects work and switches valve group 8, and the Pz1 hydraulic fluid ports of work switching valve group 8 connect clutch for clutch control valve group through quick-release connector
10 Pz2 hydraulic fluid ports；The P3 mouths of the A mouths connection vehicle attitude control valve group 14 of work switching valve group 8, B mouthfuls of connections promote control valve group 1
P2 mouthfuls；A3-A6 hydraulic fluid ports of flow proportional output control valve group II14 are separately connected 15 big chamber of vehicle body support oil cylinder；Promote control
B1 the and B2 hydraulic fluid ports of valve group 1 are separately connected the big chamber of lift cylinder, A1 and A2 hydraulic fluid ports are separately connected the small chamber of lift cylinder；Clutch control
The Az mouth connections hydraulic clutch 11 of valve group 10 processed, Af mouthfuls connect accumulator 12, and T mouthfuls take back fuel tank 7.Flow proportional output control valve
Group III adjusts the stroke of left and right lift cylinder, realizes agricultural equipment tillage resistance, ploughs for controlling suspension lift cylinder
It gestures（Height and angle）Automatic adjusument.Flow proportional output control valve group II14 is used to adjust vehicle body support oil cylinder,
Tractor is set to keep vehicle body horizontal at larger hillside fields, clutch for clutch control valve group 10 controls the hydraulic clutch 11 of tractor.
Embodiment one and embodiment two differ only in check valve I109, check valve III112, check valve V115 shuttle valves
I120, shuttle valve II 121, shuttle valve III122 are replaced.
The operation principle of the present invention is that：
When suspension is promoted, illustrate by taking the movement of right lift cylinder as an example.
（1）When oil cylinder lifts, the electromagnet of the operated proportional flow control valve 104 in flow proportional output control valve group I obtain it is electric,
And according to oil cylinder Displacement Feedback Signal Regulation valve port opening, pump discharge fluid through operated proportional flow control valve 104, check valve 110 into
Enter the big chamber of lift cylinder, oil cylinder stretches out, and when cylinder movement to designated displacement, displacement sensor feedback signal controls proportional flow control
Valve 104 processed is closed, and cylinder movement stops, and the extra fluid of pump in motion process is through 106 off-load oil return box of pressure compensator；It is automatically controlled
111 electromagnet of shut-off valve obtains electric, is operated in right position in figure, the small chamber fluid of hydraulic cylinder returns to fuel tank through electric-control stop valve 111.
（2）When oil cylinder declines, before farm implements are contacted with ground, the electromagnet of proportional reversing valve 108 adjusts proportioning valve and opens
Mouth size, control cylinder decrease speed and displacement, the work of electromagnet of 103 control valve of third proportional flow is in maximum control at this time
Electric current, valve port standard-sized sheet, pump discharge fluid enter the small chamber of lift cylinder, big chamber oil through operated proportional flow control valve 103, check valve 113
Liquid returns to fuel tank through proportional reversing valve 108.
（3）After farm implements and ground contact, for the work of electromagnet of proportional reversing valve 108 in maximum controlling current, valve port is complete
It opens, the electromagnet of operated proportional flow control valve 103 adjusts proportioning valve valve port size, in turn according to oil cylinder Displacement Feedback signal at this time
Control cylinder moving displacement and speed, the extra fluid of pump during the motion is through 106 off-load oil return box of pressure compensator.Work as oil
Cylinder movement terminates, all electromagnet dead electricity, and oil cylinder load pressure is through 107 off-load of permanent flow valve, and pump discharge fluid is through 3-position 4-way electricity
Off-load oil return box in position in magnetic reversal valve 803.
（4）Floating bit：When promoted the proportional reversing valve 108 in valve group and electric-control stop valve 111 simultaneously it is electric, two valves are all
It is operated in right position in figure, the big chamber of oil cylinder is connected with small chamber at this time, and system is operated in quick condition.
（5）When vehicle attitude control, illustrated for first cylinder movement from right to left in scheme.
The electromagnet of operated proportional flow control valve 1401 obtains electric in flow proportional output control valve group II14, and according to vehicle body branch
Leg oil cylinder Displacement Feedback signal, adjust operated proportional flow control valve openings of sizes, control cylinder moving displacement, pump discharge fluid through than
Example flow control valve 1401, check valve 1407 enter the big chamber of support oil cylinder, and oil cylinder stretches out, when cylinder movement to designated displacement, position
Displacement sensor feedback signal controls operated proportional flow control valve 1401 and closes, and cylinder movement stops, the extra oil of pump in motion process
Liquid is through 1403 off-load oil return box of pressure compensator.When support oil cylinder declines, the work of electromagnet of operated proportional flow control valve 1401
In maximum current, valve port standard-sized sheet, the electromagnet of proportional reversing valve 1405 obtains electric, and adjusts valve port size, reduction of speed under control cylinder
Degree.
Claims (5)
1. a kind of control valve group for the output of quantitative system flow proportional, it is characterised in that：Include operated proportional flow control valve,
Proportional reversing valve, pressure compensator, permanent flow valve, check valve and P hydraulic fluid ports, T hydraulic fluid ports, A1 working holes, A2 working holes, B1 work
Mouth, B2 working holes；
The P hydraulic fluid ports are respectively communicated with the import of operated proportional flow control valve, pressure compensator, the outlet point of operated proportional flow control valve
Not through check valve connection A1 working holes, A2 working holes, B1 working holes, B2 working holes, A1 working holes, A2 working holes, B1 working holes,
B2 working holes are connected to through proportional reversing valve with T hydraulic fluid ports respectively, are taken after the spring cavity of pressure compensator and the inlet communication of permanent flow valve
The load signal of operated proportional flow control valve outlet；Pressure compensator is connected to the outlet of permanent flow valve with T hydraulic fluid ports, P hydraulic fluid ports and T hydraulic fluid ports
Between be equipped with overflow valve.
2. the control valve group according to claim 1 for the output of quantitative system flow proportional, it is characterised in that：Described
It is that load keeps check valve that operated proportional flow control valve, which exports the check valve between working hole,.
3. the control valve group according to claim 1 for the output of quantitative system flow proportional, it is characterised in that：The perseverance
It flows and is equipped with damping hole between valve import and pressure compensator spring cavity.
4. the control valve group according to claim 1 for the output of quantitative system flow proportional, it is characterised in that：The pressure
After the inlet communication of force compensating device and permanent flow valve, the outlet load signal of operated proportional flow control valve is taken by unidirectional valve group.
5. the control valve group according to claim 1 for the output of quantitative system flow proportional, it is characterised in that：The pressure
After the inlet communication of force compensating device and permanent flow valve, the outlet load signal of operated proportional flow control valve is taken by shuttle valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020644.0U CN207750316U (en) | 2018-01-07 | 2018-01-07 | Control valve group for the output of quantitative system flow proportional |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020644.0U CN207750316U (en) | 2018-01-07 | 2018-01-07 | Control valve group for the output of quantitative system flow proportional |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207750316U true CN207750316U (en) | 2018-08-21 |
Family
ID=63152238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820020644.0U Withdrawn - After Issue CN207750316U (en) | 2018-01-07 | 2018-01-07 | Control valve group for the output of quantitative system flow proportional |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207750316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035945A (en) * | 2018-01-07 | 2018-05-15 | 浙江高宇液压机电有限公司 | Control valve group for the output of quantitative system flow proportional |
-
2018
- 2018-01-07 CN CN201820020644.0U patent/CN207750316U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035945A (en) * | 2018-01-07 | 2018-05-15 | 浙江高宇液压机电有限公司 | Control valve group for the output of quantitative system flow proportional |
| CN108035945B (en) * | 2018-01-07 | 2024-04-09 | 浙江高宇液压机电有限公司 | Control valve group for quantitative system flow proportion output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180821 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180821 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |