CN108644418B - Hydraulic control device for agricultural machinery - Google Patents
Hydraulic control device for agricultural machinery Download PDFInfo
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- CN108644418B CN108644418B CN201810485216.XA CN201810485216A CN108644418B CN 108644418 B CN108644418 B CN 108644418B CN 201810485216 A CN201810485216 A CN 201810485216A CN 108644418 B CN108644418 B CN 108644418B
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- 238000013016 damping Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000007306 turnover Effects 0.000 abstract description 27
- 230000009471 action Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Classifications
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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
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
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- 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
- 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
- F15B13/024—Pressure relief valves
-
- 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
- F15B13/027—Check valves
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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
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
- F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
The invention relates to a hydraulic control device for an agricultural machine, which is 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 first channel is internally provided with a reversing valve core, the first channel on one side of the reversing valve core forms a main control cavity, and the first channel on the other side forms a secondary control cavity; the second channel is used for communicating the oil return port with the secondary control cavity; a pilot operated check valve provided in the second passage to normally open the second passage; the third channel is used for communicating the second working oil port with a control port of the hydraulic control one-way valve; and the overflow valve is arranged on the third channel and used for normally disconnecting the third channel, a first port of the overflow valve is communicated with the second working oil port, a second port of the overflow valve is communicated with the control port, when the pressure of the second working oil port reaches a certain value, the overflow valve is opened, and the oil flows into the control port from the second working oil port to control the pilot-controlled check valve to be opened. The hydraulic control device has simple and reasonable structure and low cost and can automatically control the turnover of the turnover plow.
Description
Technical Field
The invention belongs to the technical field of hydraulic pressure, and particularly relates to a hydraulic control device for an agricultural machine.
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 7, the turnover mechanism of the hydraulic turnover plow mainly comprises a suspension bracket 111, a rotating shaft 115, a plow beam 112 and an oil cylinder 113, wherein the rotating shaft 115 is welded on the suspension bracket 111, the plow beam 112 is installed on the rotating shaft 115, two ends of the oil cylinder 113 are respectively hinged on the upper part of the suspension bracket and the plow beam 112 by pin shafts, and a plow body 114 is installed on the plow beam 112. 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 control device which has simple structure and low manufacturing cost and can realize automatic turnover control of a turnover plow 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 control device for an agricultural machine, 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 with the fifth through flow passage, the second through flow passage is communicated with the second working oil port, the third through flow passage is communicated with the oil inlet, the fourth through flow passage is communicated with the first 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, the reversing valve core is provided with 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, the first channel at one end of the reversing valve core forms a main control cavity, the first channel at the other end of the reversing valve core forms a secondary control cavity, the main control cavity is communicated with the oil inlet through a second flow channel, a spring enabling the reversing valve core to keep a left-moving trend is arranged in the secondary control cavity, the secondary control cavity is communicated with the oil inlet through a second damping hole, and the reversing valve core can be switched between a left end position and a right end position; the second channel is used for communicating the oil return port with the secondary control cavity; the hydraulic control one-way valve is arranged on the second channel and used for normally disconnecting the second channel, and a control opening of the hydraulic control one-way valve is communicated with the first working oil port through the first damping hole; the third channel is used for communicating the second working oil port with a control port of the hydraulic control one-way valve; and the overflow valve is arranged on the third channel and used for normally disconnecting the third channel, a first port of the overflow valve is communicated with the second working oil port, a second port of the overflow valve is communicated with the control port, when the pressure of the second working oil port reaches a certain value, the overflow valve is opened, and the oil flows into the control port from the second working oil port to control the pilot-controlled check valve to be opened.
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, a main end cover and a secondary end cover are arranged at two ends of the first channel respectively for plugging, a main control cavity is formed between the main end cover and the reversing valve core, and a secondary control cavity is formed between the secondary end cover and the reversing valve core.
Preferably, the hydraulic control check valve comprises a spring seat, a second spring, a valve sleeve, a cone valve core and a control piston, the valve sleeve is fixedly arranged in an inner hole of the second channel, the cone valve core is arranged in an inner cavity of the valve sleeve, one end of the second spring abuts against the cone valve core to enable the cone valve core to keep the trend of blocking a valve port, the other end of the second spring abuts against the spring seat, and the control piston and the cone valve core are arranged in opposite directions to control the opening of the cone valve core.
Compared with the prior art, the invention has the advantages that:
(1) the invention has simple and reasonable structure, few parts and low manufacturing cost.
(2) According to the invention, through the principle design, the hydraulic control one-way valve is arranged between the secondary control cavity and the oil return port, the first spring is arranged in the secondary control cavity, the overflow valve is arranged between the second working oil port and the control port of the hydraulic control one-way valve, the reversing from the left end position to the right end position of the reversing valve core can be automatically completed, the first working oil port is connected with the control port of the hydraulic control one-way valve through the first damping hole, so that the reversing valve core is continuously kept at the right end position after being reversed to the right end position, the automatic reversing control of the hydraulic reversing plow can be realized, and the automation degree 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 cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a schematic view of the reversing valve spool of an embodiment of the present invention in a right end operating position;
FIG. 5 is a hydraulic schematic of an embodiment of the present invention;
FIG. 6 is a hydraulic schematic diagram of an embodiment of the present invention;
fig. 7 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.
An automatic control valve for a reversible plow comprising:
the oil return valve comprises a valve block 1, 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 1;
the valve block 1 is further provided with a first flow channel 106 for communicating the first flow channel 101 with the fifth flow channel 105, the second flow channel 102 is communicated with the second working oil port B, the third flow channel 103 is communicated with the oil inlet P, the fourth flow channel 104 is communicated with the first working oil port A, and the fifth flow channel 105 is communicated with the oil return port T;
the reversing valve core 2 is arranged on the first channel 11 and can slide, a first convex shoulder 2a, a second convex shoulder 2b, a third convex shoulder 2c, a fourth convex shoulder 2d, a fifth convex shoulder 2e and a sixth convex shoulder 2f are arranged on the reversing valve core 2, the first channel at one end of the reversing valve core 2 forms a main control cavity 1a, the first channel at the other end of the reversing valve core 2 forms a secondary control cavity 1b, the main control cavity 1a is communicated with an oil inlet P through a second flow passage 112, a spring 3 enabling the reversing valve core 2 to keep a left-moving trend is arranged in the secondary control cavity 1b, the secondary control cavity 1b is communicated with the oil inlet P through a second damping hole 7b, and the reversing valve core 2 can be switched between a left end position and a right end position; two ends of the first channel 11 are respectively provided with a main end cover 4 and a secondary end cover 5 for plugging, a main control cavity 1a is formed between the main end cover 4 and the reversing valve core 2, and a secondary control cavity 1b is formed between the secondary end cover 5 and the reversing valve core 2. When the reversing valve core 2 is positioned at the left end position, the second through flow groove 102 is communicated with the third through flow groove 103, and the fourth through flow groove 104 is communicated with the fifth through flow groove 105; when the direction change valve core 3 is at the right end position, the second through flow groove 102 is communicated with the first through flow groove 101, and the third through flow groove 103 is communicated with the fourth through flow groove 104.
The second channel 12 is used for communicating the oil return port T with the secondary control cavity 1 b; the hydraulic control one-way valve 8 is arranged on the second passage 12 and used for normally disconnecting the second passage 12, and a control port 8a of the hydraulic control one-way valve 8 is communicated with the first working oil port A through a first damping hole 7 a; the pilot-controlled check valve 8 comprises a spring seat 81, a second spring 82, a valve sleeve 83, a cone valve core 84 and a control piston 85, the valve sleeve 83 is fixedly arranged in an inner hole of the second channel 12, the cone valve core 84 is arranged in an inner cavity of the valve sleeve 83, one end of the second spring 82 abuts against the cone valve core 84 to keep the cone valve core 84 in a trend of blocking a valve port 83a, the other end of the second spring 82 abuts against the spring seat 81, and the control piston 85 and the cone valve core 84 are arranged in opposite directions to control the opening of the cone valve core 84.
The third channel 13 is used for communicating the second working oil port B with a control port 8a of the hydraulic control one-way valve 8; the overflow valve 6 is arranged on the third channel 13 and used for normally disconnecting the third channel 13, a first port of the overflow valve 6 is communicated with the second working oil port B, a second port of the overflow valve 6 is communicated with the control port 8a, when the pressure of the second working oil port B reaches a certain value, the overflow valve 6 is opened, and oil flows into the control port 8a from the second working oil port B to control the opening of the hydraulic control one-way valve 8.
The working principle and the process of the invention are as follows:
in application, as shown in fig. 6 (in the figure, the hydraulic lock actually connected to the oil cylinder 17 is omitted), the oil inlet P and the oil return port T of the hydraulic reversing valve 16 are respectively connected with the working oil ports a1 and B1 of the electromagnetic reversing valve 15 for controlling oil supply, the first working oil port a of the hydraulic reversing valve is connected with the rodless cavity of the reversing cylinder 17, and the second working oil port B of the hydraulic reversing valve is connected with the rod cavity of the reversing cylinder 17.
When the turnover plow is in a working state and does not need to be turned over, the electromagnetic reversing valve 15 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 16 are also in a non-pressure state, the reversing valve core 2 is in a position shown in figure 1 under the action of the first spring 3, the second through flow groove 102 is communicated with the third through flow groove 103, and the fourth through flow groove 104 is communicated with the fifth through flow groove 105.
When the turnover plow needs to be controlled to turn over, the electromagnetic directional valve 15 is electrified, the oil inlet P of the reversing valve is communicated with the outlet of the hydraulic pump 14, the oil return port T is connected with the oil tank, as shown in fig. 2, when oil enters from the oil inlet P, the oil enters the main control cavity 1a from the oil inlet P through the second flow passage 112, and simultaneously enters the secondary control cavity 1b through the second damping hole 7b, so that the pressures of the main control cavity 1a and the secondary control cavity 1b are equal, and under the action force of the first spring 3, the reversing valve core 2 is continuously positioned as shown in fig. 1. Oil at the outlet of the hydraulic pump 14 enters the oil inlet P after passing through the electromagnetic directional valve 15, then enters the rod cavity of the turnover cylinder 17 after sequentially passing through the third through-flow groove 103, the second through-flow groove 102 and the second working oil port B, pushes the turnover cylinder 17 to retract to drive the plough beam to turn upwards, and the oil in the rodless cavity of the turnover cylinder 17 returns to the oil tank after sequentially passing through the first working oil port a, the fourth through-flow groove 104, the fifth through-flow groove 105 and the oil return port T.
When the turnover cylinder 17 retracts to the head, namely, the plough beam is driven to reach the 'dead point position', the pressure of the second working oil port B rises rapidly, when the pressure rises to the set pressure of the overflow valve 6, the overflow valve 6 is opened, the oil of the second working oil port B enters the control port 8a of the hydraulic control one-way valve 8 after sequentially passing through the overflow valve 6, the through hole 107, the through hole 108, the through hole 109 and the through hole 111, the hydraulic control one-way valve 8 is opened to unload the secondary control cavity 1B, the rightward resultant force on the reversing valve core 2 pushes the reversing valve core 2 to move rightward and finally moves to the right end position shown in figure 4, at the moment, the second through hole 102 is communicated with the first through hole 101, the third through hole 103 is communicated with the fourth through hole 104, the overflow valve 6 is closed, the oil of the first working oil port A enters the control port 8a of the hydraulic control one-way valve 8 through the first damping hole 7, the hydraulic control one-way valve 8 is kept open to unload the secondary control cavity 1b, and the overturning cylinder 17 begins to extend out to drive the plough beam to overturn downwards.
When the reversing cylinder 17 extends to the right position, the pressure of the first working oil port a rises, so that the reversing valve core 2 is continuously kept at the position shown in fig. 4. At the moment, the electromagnetic directional valve 15 is de-energized, the pressure of the oil inlet P disappears, and the directional valve core 2 returns to the position shown in figure 1 under the action of the first spring 3 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 (4)
1. A hydraulic control device for an agricultural machine, characterized in that: comprises that
The oil return valve comprises a valve block (1), 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 (1);
the valve block (1) is further provided with a first flow channel (106) for communicating the first through flow channel (101) and the fifth through flow channel (105), the second through flow channel (102) is communicated with the second working oil port (B), the third through flow channel (103) is communicated with the oil inlet (P), the fourth through flow channel (104) is communicated with the first working oil port (A), and the fifth through flow channel (105) is communicated with the oil return port (T);
the reversing valve core (2) is arranged in the first channel (11) and can slide, a first convex shoulder (2a), a second convex shoulder (2b), a third convex shoulder (2c), a fourth convex shoulder (2d), a fifth convex shoulder (2e) and a sixth convex shoulder (2f) are arranged on the reversing valve core (2), the first channel at one end of the reversing valve core (2) forms a main control cavity (1a), the first channel at the other end of the reversing valve core (2) forms a secondary control cavity (1b), the main control cavity (1a) is communicated with an oil inlet (P) through a second flow channel (112), a spring (3) enabling the reversing valve core (2) to keep a left-moving trend is arranged in the secondary control cavity (1b), the secondary control cavity (1b) is communicated with the oil inlet (P) through a second damping hole (7b), and the reversing valve core (2) can be switched between a left end position and a right end position;
a second passage (12), wherein the second passage (12) is used for communicating the oil return port (T) and the secondary control cavity (1 b);
the hydraulic control one-way valve (8) is arranged on the second channel (12) and used for normally disconnecting the second channel (12), and a control port (8a) of the hydraulic control one-way valve (8) is communicated with the first working oil port (A) through a first damping hole (7 a);
the third channel (13), the third channel (13) is used for connecting the second working oil port (B) and the control port (8a) of the pilot operated check valve (8);
the overflow valve (6) is arranged on the third channel (13) and used for normally disconnecting the third channel (13), a first port of the overflow valve (6) is communicated with the second working oil port (B), a second port of the overflow valve (6) is communicated with the control port (8a), when the pressure of the second working oil port (B) reaches a certain value, the overflow valve (6) is opened, and oil flows into the control port (8a) from the second working oil port (B) to control the hydraulic control one-way valve (8) to be opened.
2. The hydraulic control device for an agricultural machine of claim 1, wherein: when the reversing valve core (2) is positioned at the left end position, the second through flow groove (102) is communicated with the third through flow groove (103), and the fourth through flow groove (104) is communicated with the fifth through flow groove (105); when the reversing valve core (2) is at the right end position, the second through flow groove (102) is communicated with the first through flow groove (101), and the third through flow groove (103) is communicated with the fourth through flow groove (104).
3. The hydraulic control device for an agricultural machine of claim 1, wherein: two ends of the first channel (11) are respectively provided with a main end cover (4) and an auxiliary end cover (5) for plugging, a main control cavity (1a) is formed between the main end cover (4) and the reversing valve core (2), and an auxiliary control cavity (1b) is formed between the auxiliary end cover (5) and the reversing valve core (2).
4. The hydraulic control device for an agricultural machine of claim 1, wherein: the hydraulic control one-way valve (8) comprises a spring seat (81), a second spring (82), a valve sleeve (83), a cone valve core (84) and a control piston (85), the valve sleeve (83) is fixedly arranged in an inner hole of the second channel (12), the cone valve core (84) is arranged in an inner cavity of the valve sleeve (83), one end of the second spring (82) abuts against the cone valve core (84) to enable the second spring (82) to keep the trend of blocking a valve port (83a), the other end of the second spring (82) abuts against the spring seat (81), and the control piston (85) and the cone valve core (84) are arranged in opposite directions to control the opening of the cone valve core (84).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485216.XA CN108644418B (en) | 2018-05-18 | 2018-05-18 | Hydraulic control device for agricultural machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485216.XA CN108644418B (en) | 2018-05-18 | 2018-05-18 | Hydraulic control device for agricultural machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108644418A CN108644418A (en) | 2018-10-12 |
| CN108644418B true CN108644418B (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810485216.XA Active CN108644418B (en) | 2018-05-18 | 2018-05-18 | Hydraulic control device for agricultural machinery |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116357776B (en) * | 2023-06-02 | 2023-08-01 | 太原理工大学 | Three-way speed regulating valve for hydraulic support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10004905C2 (en) * | 2000-02-04 | 2002-10-24 | Orenstein & Koppel Ag | Method and device for controlling a lifting cylinder, in particular of working machines |
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2018
- 2018-05-18 CN CN201810485216.XA patent/CN108644418B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3782404A (en) * | 1972-06-14 | 1974-01-01 | Commercial Shearing | Adjustable, metered, directional flow control arrangements |
| CN202118019U (en) * | 2011-04-17 | 2012-01-18 | 常德中联重科液压有限公司 | Hydraulic control component and control loop applying same |
| CN203098443U (en) * | 2013-01-30 | 2013-07-31 | 湖州生力液压有限公司 | Overflow structure used for hydraulic pile-up valve of harvester and hydraulic pile-up valve |
| CN204152871U (en) * | 2014-09-11 | 2015-02-11 | 宁波市博尔法液压有限公司 | A kind of truck crane multi-way valve |
| CN104235108A (en) * | 2014-09-18 | 2014-12-24 | 芜湖高昌液压机电技术有限公司 | Accelerating loop of gantry lifter accelerating cylinder |
| CN204259534U (en) * | 2014-10-31 | 2015-04-15 | 西安达刚路面机械股份有限公司 | Transplanting tree car lifting overturn system containing one-level flow pressure-gradient control valve group |
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| Publication number | Publication date |
|---|---|
| CN108644418A (en) | 2018-10-12 |
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Effective date of registration: 20191202 Address after: 211200 Baima Town, Lishui District, Jiangsu, Nanjing Applicant after: Jiangsu Nanjing Baima modern agricultural high tech Industrial Park Co.,Ltd. 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. |
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Address after: 111 Baima Avenue, Baima Town, Lishui District, Nanjing City, Jiangsu Province, 211200 Patentee after: Jiangsu Nanjing national agricultural hi tech Industry Demonstration Zone Development Group Co.,Ltd. Address before: 211200 Baima Town, Lishui District, Nanjing City, Jiangsu Province Patentee before: Jiangsu Nanjing Baima modern agricultural high tech Industrial Park Co.,Ltd. |
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Denomination of invention: A hydraulic control device for agricultural machinery Effective date of registration: 20231222 Granted publication date: 20191224 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Pledgor: Jiangsu Nanjing national agricultural hi tech Industry Demonstration Zone Development Group Co.,Ltd. Registration number: Y2023980073747 |