CN108591160B - Hydraulic valve for agricultural machinery - Google Patents
Hydraulic valve for agricultural machinery Download PDFInfo
- Publication number
- CN108591160B CN108591160B CN201810485603.3A CN201810485603A CN108591160B CN 108591160 B CN108591160 B CN 108591160B CN 201810485603 A CN201810485603 A CN 201810485603A CN 108591160 B CN108591160 B CN 108591160B
- Authority
- CN
- China
- Prior art keywords
- flow groove
- valve
- communicated
- port
- valve core
- 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.)
- Active
Links
- 230000009471 action Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007306 turnover Effects 0.000 description 24
- 230000008859 change Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Images
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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B15/00—Elements, tools, or details of ploughs
-
- 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
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/041—Valve members; Fluid interconnections therefor with two positions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a hydraulic valve for agricultural machinery, which is characterized in that: the reversing valve comprises a valve block, a reversing valve core, a left end cover, a right end cover, a large plunger piston, a small plunger piston, a first spring and an overflow valve, wherein an oil inlet, an oil return port, a first working oil port and a second working oil port are formed in the valve block, the reversing valve core is arranged in the first passage in a sliding mode, the left end cover and the right end cover are respectively fixed at the left end and the right end of the valve block and used for plugging the first passage, the large plunger piston is arranged in the left end cover in a sliding mode and formed with a main control cavity through the left end cover, the small plunger piston is arranged in the right end cover in a sliding mode and formed with the right end cover, the first spring is arranged in the right oil return cavity, the overflow valve is arranged on the second passage and used for normally breaking the second passage, and the reversing valve core can. The hydraulic valve has the advantages of simple structure, low manufacturing cost and capability of realizing automatic control.
Description
Technical Field
The invention belongs to the technical field of hydraulic valves, and particularly relates to a hydraulic valve for agricultural machinery.
Background
In recent years, hydraulic reversible plows have begun to be popularized and applied in most areas of China. The ploughing and lifting function with the turning plow has the advantages of no ridge opening and closing, high production efficiency, energy saving, etc. The hydraulic turnover plow uses the hydraulic system of tractor to control the alternate operation of left and right plow bodies, so as to achieve the purpose of no opening and closing ridges. As shown in figure 6, the turnover mechanism of the hydraulic turnover plow mainly comprises a suspension bracket 101, a rotating shaft 105, a plow beam 102 and an oil cylinder 103, wherein the rotating shaft 105 is welded on the suspension bracket 101, the plow beam 102 is arranged on the rotating shaft 105, two ends of the oil cylinder 103 are respectively hinged on the upper part of the suspension bracket and the plow beam 102 by pin shafts, and a plow body 104 is arranged on the plow beam 102. The oil cylinder is controlled by a hydraulic system of the tractor, and when the plough is in a working state, the oil cylinder is in a maximum extension state. When the plough beam rotates to a position close to the vertical position, the oil cylinder is controlled to extend out, so that the plough beam crosses a dead point position, and continues to rotate under the action of thrust and gravity of the oil cylinder until the plough beam stops working at the other side.
At present, the turning control valve used for controlling the oil cylinder at home and abroad mainly has two forms, one is a manual hydraulic turning control valve, and the other is an automatic turning control valve. The manual mode is that the driver of the tractor directly operates the manual slide valve to control the oil path of the oil cylinder to make the reversible plough turn over initially, the plough shifts the shifting fork to drive a rotary valve to make the oil path of the oil cylinder change over when the plough goes beyond the middle position, and the turnover control valve is operated by the driver of the tractor except for operating the steering wheel and lifting the plough when the ground turns, so that the actions are very nervous and busy in a short time, and the labor intensity is increased; meanwhile, two control valves are required, so that the structure is complex and the cost is high. The automatic turnover control valve utilizes a set of mechanism to control two rotary valves, so that the first rotary valve controls the oil way of the oil cylinder to make the plough start to turn over, and the second rotary valve controls the change-over of the oil way of the oil cylinder in the turnover process to realize the turnover reversing of the plough. The turnover mechanism realizes full-automatic turnover reversing. However, the structure is very complicated, the reliability is poor, and the cost of using two control rotary valves is still high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydraulic valve which is simple in structure, low in manufacturing cost and capable of realizing automatic overturning reversing control on overturning ploughing, aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a hydraulic valve for agricultural machinery, characterized in that: the hydraulic control valve comprises a valve block, wherein an oil inlet, an oil return port, a first working oil port and a second working oil port are formed in the valve block; the valve block is also provided with a first flow passage for communicating the first through flow passage and the fifth through flow passage, the second through flow passage is communicated with the first working oil port, the third through flow passage is communicated with the oil inlet, the fourth through flow passage is communicated with the second working oil port, and the fifth through flow passage is communicated with the oil return port; the reversing valve core is arranged in the first channel and can slide, a first convex shoulder, a second convex shoulder, a third convex shoulder, a fourth convex shoulder, a fifth convex shoulder and a sixth convex shoulder are arranged on the reversing valve core, a right oil return cavity is communicated with a fifth through flow groove through a second through flow groove arranged on the sixth convex shoulder, and the reversing valve core can be switched between a left end position and a right end position; the large plunger is arranged in the left end cover in a sliding mode, a main control cavity is formed between the large plunger and the left end cover, a left oil return cavity is formed between the large plunger and the reversing valve core, the main control cavity is communicated with the second working oil port through a damper, and the left oil return cavity is communicated with the first flow through groove through a first flow through groove formed in the first convex shoulder; the right end cover is fixedly connected to the right end of the valve block to plug the first channel; the small plunger is slidably arranged in the right end cover, the diameter of the small plunger is smaller than that of the large plunger, a secondary control cavity is formed between the small plunger and the right end cover and is communicated with the oil inlet through a second flow channel, a right oil return cavity is formed between the small plunger and the reversing valve core and is communicated with a fifth through flow channel through a second flow channel arranged on a sixth convex shoulder, and a first spring enabling the reversing valve core to keep a left moving trend is arranged in the right oil return cavity; the second channel is used for communicating the first working oil port with the main control cavity; the overflow valve is arranged on the second channel and used for normally disconnecting the second channel, a first port of the overflow valve is communicated with the first working oil port, a second port of the overflow valve is communicated with the main control cavity, when the pressure of the first working oil port reaches a certain value, the overflow valve is opened, and oil flows into the main control cavity from the first working oil port.
Preferably, when the reversing valve core is positioned at the left end position, the second through flow groove is communicated with the third through flow groove, and the fourth through flow groove is communicated with the fifth through flow groove; when the reversing valve core is positioned at the right end position, the second through flow groove is communicated with the first through flow groove, and the third through flow groove is communicated with the fourth through flow groove.
Preferably, the overflow valve comprises a conical valve core, a sliding sleeve, a second spring and a threaded sleeve, the threaded sleeve is fixedly connected to the valve block, the second spring is arranged in an inner cavity of the threaded sleeve, the sliding sleeve is arranged in an inner hole of the valve block in a sliding mode, the upper end of the sliding sleeve abuts against a step of the conical valve core, the lower end of the sliding sleeve abuts against the second spring, and the conical valve core keeps the tendency of blocking the valve port under the action force of the second spring.
Compared with the prior art, the invention has the advantages that:
(1) simple and reasonable structure, few parts and low cost.
(2) Through the design of principle, can realize the sequential control to the withdrawal of upset jar, reextension automatically to accomplish the automatic upset control to hydraulic pressure turnover plow, need not artificial intervention, degree of automation is high.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the reversing valve spool of an embodiment of the present invention in a right end operating position;
FIG. 4 is a hydraulic schematic of an embodiment of the present invention;
FIG. 5 is a hydraulic schematic diagram of an embodiment of the present invention;
fig. 6 is a schematic view of a hydraulic tilting mechanism.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 3, a preferred embodiment of the present invention is shown.
A hydraulic valve for an agricultural machine, comprising:
the valve block 2 is provided with an oil inlet P, an oil return port T, a first working oil port A and a second working oil port B;
the first passage L1 is provided with a first annular flow through groove 201, a second annular flow through groove 202, a third annular flow through groove 203, a fourth annular flow through groove 204 and a fifth annular flow through groove 205 on the first passage L1, the valve block 2 is further provided with a first flow passage 21 for communicating the first annular flow through groove 201 and the fifth annular flow through groove 205, the second annular flow through groove 202 is communicated with the first working oil port a, the third annular flow through groove 203 is communicated with the oil inlet P, the fourth annular flow through groove 204 is communicated with the second working oil port B, and the fifth annular flow through groove 205 is communicated with the oil return port T;
the reversing valve core 3 is arranged in the first channel L1 and can slide, a first shoulder 3a, a second shoulder 3b, a third shoulder 3c, a fourth shoulder 3d, a fifth shoulder 3e and a sixth shoulder 3f are arranged on the reversing valve core 3, the reversing valve core 3 can be switched between a left end position and a right end position, when the reversing valve core 3 is positioned at the left end position, the second through flow groove 202 is communicated with the third through flow groove 203, and the fourth through flow groove 204 is communicated with the fifth through flow groove 205; when the direction change valve element 3 is at the right end position, the second vent groove 202 is communicated with the first vent groove 201, and the third vent groove 203 is communicated with the fourth vent groove 204.
The left end cover 1 is fixedly connected to the left end of the valve block 2 to seal off the first channel L1; the large plunger 7 is arranged in the left end cover 1 in a sliding mode, a main control cavity 1a is formed between the large plunger 7 and the left end cover 1, a left oil return cavity 2a is formed between the large plunger 7 and the reversing valve core 3, the main control cavity 1a is communicated with the second working oil port B through a damper 8, and the left oil return cavity 2a is communicated with the first through flow groove 201 through a first through flow groove 31 formed in the first shoulder 3 a;
a right end cap 4 fixedly connected to the right end of the valve block 2 to block the first passage L1; the small plunger 6 is arranged in the right end cover 4 in a sliding mode, the diameter of the small plunger 6 is smaller than that of the large plunger 7, a secondary control cavity 4a is formed between the small plunger 6 and the right end cover 4, a right oil return cavity 2b is formed between the small plunger 6 and the reversing valve core 3, the right oil return cavity 2b is communicated with the fifth through flow groove 205 through a second through flow groove 32 formed in the sixth convex shoulder 3f, and a first spring 5 enabling the reversing valve core 3 to keep moving left is arranged in the right oil return cavity 2 b;
the second channel L2 is used for communicating the first working oil port A with the main control cavity 1 a; the overflow valve 9 is arranged on the second passage L2 and used for normally disconnecting the second passage L2, a first port of the overflow valve 9 is communicated with the first working oil port a, a second port of the overflow valve 9 is communicated with the main control chamber 1a, when the pressure of the first working oil port a reaches a certain value, the overflow valve 9 is opened, and oil flows into the main control chamber 1a from the first working oil port a. The overflow valve 9 comprises a cone valve core 91, a sliding sleeve 92, a second spring 93 and a threaded sleeve 94, wherein the threaded sleeve 94 is fixedly connected to the valve block 2, the second spring 93 is arranged in an inner cavity of the threaded sleeve 94, the sliding sleeve 92 is slidably arranged in an inner hole of the valve block 2, the upper end of the sliding sleeve is abutted against the step of the cone valve core 91, the lower end of the sliding sleeve is abutted against the second spring 93, and the cone valve core 91 keeps the trend of blocking the valve port 9a under the action force of the second spring 93.
The working principle and the process of the invention are as follows:
in application, as shown in fig. 5 (in the figure, the hydraulic lock actually connected to the oil cylinder 13 is omitted), the oil inlet P and the oil return port T of the hydraulic reversing valve 12 are respectively connected with the working oil ports a1 and B1 of the electromagnetic reversing valve 11 for controlling oil supply, the first working oil port a of the hydraulic reversing valve is connected with the rod cavity of the reversing cylinder 13, and the second working oil port B of the hydraulic reversing valve is connected with the rodless cavity of the reversing cylinder 13.
When the turnover plow is in a working state and does not need to be turned over, the electromagnetic directional valve 11 is in a power-off state, the oil ports a1 and B1 are communicated with the oil return port T1, the oil inlet P and the oil return port T of the reversing valve 12 are also in a non-pressure state, the reversing valve core 3 is in a position shown in fig. 2 under the action of the first spring 5, the second through flow groove 202 is communicated with the third through flow groove 203, and the fourth through flow groove 204 is communicated with the fifth through flow groove 205.
When the turnover plow needs to be controlled to turn over, the electromagnetic reversing valve 11 is electrified, the oil inlet P of the reversing valve is communicated with the outlet of the hydraulic pump 10, the oil return port T is connected with the oil tank, as shown in fig. 1, when oil enters the oil inlet P, the oil enters the secondary control cavity 4a from the oil inlet P after sequentially passing through the third flow passing groove 203 and the second flow passage 22 to exert a leftward acting force on the small plunger 6, and under the leftward thrust of the small plunger 6 and the acting force of the first spring 5, the reversing valve core 3 is continuously positioned as shown in fig. 1. The oil liquid at the outlet of the hydraulic pump 10 enters the oil inlet P after passing through the electromagnetic directional valve 11, then enters the rod cavity of the turnover cylinder 13 after sequentially passing through the third through flow groove 203, the second through flow groove 202 and the first working oil port a, pushes the turnover cylinder 13 to retract and drive the plough beam to turn upwards, and the oil liquid in the rodless cavity of the turnover cylinder 13 returns to the oil tank after sequentially passing through the second working oil port B, the fourth through flow groove 204, the fifth through flow groove 205 and the oil return port T.
When the turnover cylinder 13 retracts to the head, namely, the plough beam is driven to reach the dead point position, the pressure of the first working oil port A rises rapidly, when the pressure rises to the set pressure of the overflow valve 9, the cone valve core 91 is opened, the oil liquid of the first working oil port A enters the main control cavity 1a through the valve port 9a, the pressure of the main control cavity 1a is equal to that of the secondary control cavity 4a, however, because the diameter of the large plunger 7 is larger than that of the small plunger 6, the resultant force on the direction change valve core 3 to the right pushes the direction change valve core 3 to move to the right, and finally moves to the right end position as shown in fig. 3, at this time, the second through-flow groove 202 is communicated with the first through-flow groove 201, and the third through-flow groove 203 is communicated with the fourth through-flow groove 204, meanwhile, the overflow valve 9 is closed, oil of the second working oil port B enters the main control cavity 1a through the damper 8 to keep the reversing valve core 3 at the right end position, and the overturning cylinder 13 begins to extend out to drive the plough beam to overturn downwards.
When the reversing cylinder 13 extends to the right position, the pressure of the second working oil port B rises, so that the reversing valve core 3 is continuously maintained at the position shown in fig. 3. At the moment, the electromagnetic directional valve 11 is de-energized, the pressure of the oil inlet P disappears, and the directional valve core 3 returns to the position shown in figure 1 under the action of the first spring 5 to prepare for the next turning control. Therefore, the driver can complete the automatic turnover control of the turnover plow by controlling the electric control button, and the manual intervention is not needed in the process of switching the turnover plow from the upper turnover to the lower turnover.
Claims (2)
1. A hydraulic valve for agricultural machinery, characterized in that: comprises that
The oil return valve comprises a valve block (2), wherein an oil inlet (P), an oil return port (T), a first working oil port (A) and a second working oil port (B) are formed in the valve block (2);
the oil return valve comprises a first passage (L1), wherein the first passage (L1) is provided with a first annular through flow groove (201), a second annular through flow groove (202), a third annular through flow groove (203), a fourth annular through flow groove (204) and a fifth annular through flow groove (205), a first flow passage (21) for communicating the first through flow groove (201) with the fifth annular through flow groove (205) is further arranged on a valve block (2), the second through flow groove (202) is communicated with a first working oil port (A), the third annular through flow groove (203) is communicated with an oil inlet (P), the fourth through flow groove (204) is communicated with a second working oil port (B), and the fifth through flow groove (205) is communicated with an oil return port (T);
the reversing valve core (3) is arranged in the first channel (L1) and can slide, a first shoulder (3a), a second shoulder (3b), a third shoulder (3c), a fourth shoulder (3d), a fifth shoulder (3e) and a sixth shoulder (3f) are arranged on the reversing valve core (3), and the reversing valve core (3) can be switched between a left end position and a right end position;
the left end cover (1) is fixedly connected to the left end of the valve block (2) to seal off the first channel (L1);
the large plunger (7) is arranged in the left end cover (1) in a sliding mode, a main control cavity (1a) is formed between the large plunger (7) and the left end cover (1), a left oil return cavity (2a) is formed between the large plunger (7) and the reversing valve core (3), the main control cavity (1a) is communicated with a second working oil port (B) through a damper (8), and the left oil return cavity (2a) is communicated with a first through flow groove (201) through a first through flow groove (31) formed in a first convex shoulder (3 a);
the right end cover (4) is fixedly connected to the right end of the valve block (2) to block the first channel (L1);
the small plunger piston (6) is arranged in the right end cover (4) in a sliding mode, the diameter of the small plunger piston (6) is smaller than that of the large plunger piston (7), a secondary control cavity (4a) is formed between the small plunger piston (6) and the right end cover (4), a right oil return cavity (2b) is formed between the small plunger piston (6) and the reversing valve core (3), the secondary control cavity (4a) is communicated with the oil inlet (P) through a second flow channel (22), the right oil return cavity (2b) is communicated with a fifth flow channel (205) through a second flow channel (32) formed in a sixth shoulder (3f), and a first spring (5) enabling the reversing valve core (3) to keep a left moving trend is arranged in the right oil return cavity (2 b);
the second channel (12), the second channel (12) is used for communicating the first working oil port (A) and the main control cavity (1 a);
the overflow valve (9) is arranged on the second channel (L2) and is used for normally disconnecting the second channel (L2), a first port of the overflow valve (9) is communicated with the first working oil port (A), a second port of the overflow valve (9) is communicated with the main control cavity (1a), when the pressure of the first working oil port (A) reaches a certain value, the overflow valve (9) is opened, the oil liquid flows into the main control cavity (1a) from the first working oil port (A), the overflow valve (9) comprises a cone valve core (91), a sliding sleeve (92), a second spring (93) and a threaded sleeve (94), the threaded sleeve (94) is fixedly connected to the valve block (2), the second spring (93) is arranged in an inner cavity of the threaded sleeve (94), the sliding sleeve (92) is arranged in an inner hole of the valve block (2) in a sliding manner, the upper end of the valve core is propped against the step of the cone valve core (91), the lower end of the valve core is propped against the second spring (93), the cone valve core (91) keeps the tendency of blocking the valve port (9a) under the action of the second spring (93).
2. A hydraulic valve for an agricultural machine, according to claim 1, wherein: when the reversing valve core (3) is positioned at the left end position, the second through flow groove (202) is communicated with the third through flow groove (203), and the fourth through flow groove (204) is communicated with the fifth through flow groove (205); when the reversing valve core (3) is at the right end position, the second through flow groove (202) is communicated with the first through flow groove (201), and the third through flow groove (203) is communicated with the fourth through flow groove (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485603.3A CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485603.3A CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108591160A CN108591160A (en) | 2018-09-28 |
| CN108591160B true CN108591160B (en) | 2020-09-25 |
Family
ID=63632092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810485603.3A Active CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591160B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203770272U (en) * | 2013-12-13 | 2014-08-13 | 三一汽车制造有限公司 | Integrated hydraulic valve set, hydraulic drive system and concrete pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852223B (en) * | 2009-03-30 | 2013-09-04 | 徐州重型机械有限公司 | Telescopic arm control system |
| DE102012208080A1 (en) * | 2012-05-15 | 2013-11-21 | Robert Bosch Gmbh | Hydraulic block for a slip-controlled vehicle brake system |
| CN202732519U (en) * | 2012-07-13 | 2013-02-13 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve group, hydraulic system and engineering machine |
| CN104088837B (en) * | 2014-07-02 | 2016-08-17 | 徐州重型机械有限公司 | Oil cylinder sequentially-operating hydraulic control system and engineering mechanical device |
| CN205117855U (en) * | 2015-07-31 | 2016-03-30 | 湖南鸿辉科技有限公司 | Integrated topping up valves of full hydraulic braking of wheeled engineering machinery |
| CN205243997U (en) * | 2015-12-18 | 2016-05-18 | 黄培华 | Hydraulic pressure lock speed governing combination switching -over valve |
-
2018
- 2018-05-18 CN CN201810485603.3A patent/CN108591160B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203770272U (en) * | 2013-12-13 | 2014-08-13 | 三一汽车制造有限公司 | Integrated hydraulic valve set, hydraulic drive system and concrete pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108591160A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108591156B (en) | Oil way switching valve | |
| EP3580457A1 (en) | Hydraulic plunger pump variable control structure and control method for the same | |
| CN108612694B (en) | Control valve | |
| CN108626195B (en) | Control valve | |
| CN108679029B (en) | Oil cylinder control valve | |
| CN108644418B (en) | Hydraulic control device for agricultural machinery | |
| CN108644173B (en) | a hydraulic valve | |
| CN108644417B (en) | Valve for double-cylinder control | |
| CN108591155B (en) | Multi-way reversing valve | |
| CN108661973B (en) | Automatic turnover control valve | |
| CN108626193B (en) | Plug-in type valve | |
| CN108591160B (en) | Hydraulic valve for agricultural machinery | |
| CN108591159B (en) | Automatic control valve for turnover plow | |
| CN108679022B (en) | Double-cylinder control system | |
| CN108708882B (en) | Multi-way valve for agricultural machinery | |
| CN108626190B (en) | Plug-in type control valve | |
| CN108757612B (en) | Double-cylinder control system with multi-way valve | |
| CN108799226B (en) | A cartridge type flip control valve | |
| CN108612695B (en) | An automatic reversing valve for single cylinder | |
| CN108626189B (en) | Control valve | |
| CN108757625B (en) | Control valve | |
| CN108626196B (en) | Hydraulic valve device for sequential action of double hydraulic cylinders | |
| CN108591153B (en) | Multi-way valve | |
| CN108591154B (en) | Automatic control hydraulic valve for turnover plow | |
| CN108488132B (en) | Double-cylinder automatic control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200903 Address after: 318000 building 20, Jiepai community, Jiaojiang District, Taizhou City, Zhejiang Province Applicant after: Gallstone Address before: 315000 188 Jinghua Road, Ningbo high tech Zone, Zhejiang (1493 tower, 041 block B block, modern building, Ningbo harbour). Applicant before: NINGBO ZHENGE HYDRAULIC TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |