CN107420367B - Manual control valve of harvester - Google Patents
Manual control valve of harvester Download PDFInfo
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- CN107420367B CN107420367B CN201710883978.0A CN201710883978A CN107420367B CN 107420367 B CN107420367 B CN 107420367B CN 201710883978 A CN201710883978 A CN 201710883978A CN 107420367 B CN107420367 B CN 107420367B
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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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a manual control valve of a harvester, and belongs to the technical field of hydraulic pressure. The manual control valve solves the problem that the control stability and the precision degree of the manual control valve of the existing harvester are poor. The manual control valve of the harvester comprises a valve body, wherein a reversing control valve I and a reversing control valve II are connected with an oil inlet and an oil return port in a serial-parallel connection mode; the first reversing control valve is provided with a first control oil passage which can be communicated with a first control oil port on the valve body, a fixed orifice is arranged on the first control oil passage, and a communication oil passage is also arranged on the first reversing control valve; the reversing control valve II is provided with an oil supply oil way and an oil inlet oil way, a throttling small hole is arranged on the oil inlet oil way, the control oil way II and the control oil way III of the reversing control valve II can be respectively communicated with the control oil port II and the control oil port III on the valve body, the reversing control valve II is also provided with a switching oil way communicated with the switching oil port on the valve body, and the oil supply oil way and the switching oil way are connected through the flow pressure control valve. The manual control valve of the harvester improves control precision and stability.
Description
Technical Field
The invention belongs to the technical field of hydraulic pressure, and relates to a manual control valve of a harvester.
Background
The harvester is an integrated machine for harvesting crops, harvesting and threshing are completed once, grains are concentrated in a storage bin, and then the grains are conveyed to a transport vehicle through a conveyor belt. For example, the main actions of current rice harvesters are five: reel lifting, barrel rotating, header lifting and left-right steering. The hydraulic system of the rice harvester can be configured into a valve integrating reel lifting, barrel lifting and rotation, and a valve integrating header lifting and left-right steering.
The header lifting and left-right steering integrated valve, for example, the applicant has developed and filed a chinese patent [ application No. 20151687810. X; the utility model provides an authorized bulletin number CN 204610967U's an agricultural machinery header steering valve, including the valve body, be located the steering valve pocket and the lift valve pocket of valve body, there are oil inlet and oil return mouth on the valve body, there are first oil inlet that is linked together with the lift valve pocket on the valve body, oil return mouth and lift working mouth, still there are left turning working mouth that is linked together with the steering valve pocket on the valve body, right turning working mouth, steering cylinder oil return mouth, oil inlet second and oil return mouth, oil return mouth and oil return mouth intercommunication through the oil return passageway, oil inlet first communicates with the oil inlet through oil inlet passageway, oil inlet second communicates with oil inlet through oil inlet passageway, be provided with steering valve rod and lift valve rod that is parallel to each other in steering valve pocket and the lift valve pocket respectively, the lift valve rod can slide along the lift valve pocket and make lift working mouth and oil inlet or oil return mouth be linked together, steering valve rod can make oil inlet second select to be linked together with left turning working mouth, right turning working mouth or steering cylinder oil return mouth.
The agricultural machinery header steering valve can control the header to lift and steer left and right, and the control valve for controlling the reel to lift, the barrel to lift and rotate still needs to be redesigned.
Whereas existing harvester control valves, for example, chinese patent [ application No. 20151747649. X; the integral four-way control reversing valve comprises a valve body, an oil inlet, an oil return port, a steering cylinder left port, a steering cylinder right port, a steering cylinder oil return port, a grain discharging cylinder rodless cavity port, a grain discharging cylinder rod cavity port, a header cylinder port and a reel cylinder port which are arranged on the valve body, wherein the steering cylinder control slide valve is communicated with the steering cylinder left port, the steering cylinder right port, the steering cylinder oil return port, the grain discharging cylinder rodless cavity port, the grain discharging cylinder control slide valve is communicated with the grain discharging cylinder rod cavity port, the header cylinder control slide valve is communicated with the header cylinder port, the reel cylinder control slide valve is communicated with the reel cylinder port, and an overflow valve is communicated with the oil inlet.
The four-way control reversing valve is simple in structure, convenient to operate, light in weight and compact in structure. However, the structure of the control valve has the problems that the pressure loss is large due to more oil paths in the valve body, the hydraulic oil is insufficient in supply or the pressure change is large, the oil pressure of the control oil is unstable, and the stability and the accuracy of the control are affected. In addition, the existing hydraulic reversing valve structure is short in speed regulation area, high-pressure impact is easy to generate, and after the valve rod returns to the middle position, the return time of the hydraulic lock is long, so that locking of an actuating mechanism is not facilitated.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a manual control valve for a harvester, which solves the technical problems of how to enable the manual control valve to control an actuating mechanism of the harvester to stably and accurately act.
The aim of the invention can be achieved by the following technical scheme: the manual control valve of the harvester comprises a valve body, wherein an oil inlet and an oil return port are formed in the valve body, and a reversing control valve I and a reversing control valve II are arranged in the valve body; the first reversing control valve is provided with a first control oil passage which can be communicated with a first control oil port on the valve body, a fixed orifice is arranged on the first control oil passage, and the first reversing control valve is also provided with a communication oil passage which is used for being communicated with a second reversing control valve; the reversing control valve II is provided with an oil supply oil way communicated with the communicating oil way and an oil inlet oil way communicated with the oil supply oil way, a throttling small hole is arranged on the oil inlet oil way, the control oil way II and the control oil way III of the reversing control valve II can be respectively communicated with the control oil port II and the control oil port III on the valve body, the reversing control valve II is also provided with a switching oil way communicated with the switching oil port on the valve body, and the oil supply oil way and the switching oil way are connected through the flow pressure control valve.
The difference with the existing structure is that the reversing control valve I and the reversing control valve II of the manual control valve of the harvester are connected in series-parallel, and the reversing control valve II can only act when the reversing control valve is located at the middle position, so that the possibility of misoperation is prevented. And a throttle small hole is arranged on an oil inlet oil path of the reversing control valve II, and a flow pressure control valve is directly arranged on an oil supply oil path and a switching oil path, so that the pressure difference between an inlet and an outlet of the throttle small hole is constant. When the reversing control valve II reverses, the flow of the oil inlet oil way gradually changes from small to large until the constant flow of the throttling small hole is reached. Therefore, the flow of the second control oil way and the flow of the third control oil way of the reversing control valve are precisely controlled, fluctuation is reduced, precise control of the actuating mechanism is achieved, and the stability of the action of the actuating mechanism is obviously improved. And the fixed orifice is arranged on the first control oil way of the first reversing control valve, so that the flow of the first control oil way can be controlled, the impact phenomenon caused by excessive oil supply is avoided, and the stability of an actuating mechanism controlled by the first reversing control valve is further improved.
In the manual control valve of the harvester, the first reversing control valve and the second reversing control valve both comprise control oil cavities, wherein the control oil cavities are internally provided with oil inlet grooves, oil return grooves, first control cavity oil grooves, second control cavity oil grooves and third control cavity oil grooves, the number of the oil inlet grooves is two, one oil inlet groove is positioned at a position adjacent to the third control cavity oil grooves, and the other oil inlet groove is positioned at one side adjacent to the first control cavity oil grooves and the second control cavity oil grooves; and the other sides of the first control cavity oil groove and the second control cavity oil groove are respectively provided with an oil return groove.
Compared with the five-oil-duct hydraulic reversing valve structure in the prior art, the five-oil-duct hydraulic reversing valve structure has the advantages that the oil inlet grooves and the oil return grooves are formed, when the valve rod is in a middle position, the grooves of the valve rod are communicated with the oil inlet grooves and the oil grooves of the control cavity, the flow area is larger than that of the oil communicated with the inside of the valve rod, and the pressure loss of the middle position is reduced. Meanwhile, the speed regulating areas of the first reversing control valve and the second reversing control valve are longer, so that the operation of the executing mechanism is more stable, and the impact phenomenon is avoided.
In the manual control valve of the harvester, the first control cavity oil groove is centered, the second control cavity oil groove and the third control cavity oil groove are respectively located at two sides of the first control cavity oil groove, an oil return groove adjacent to the second control cavity oil groove is located at one end of the control oil cavity, and the other end of the control oil cavity is further provided with an oil return groove adjacent to the third control cavity oil groove. Through setting up the oil return groove in the position department that is close to the control oil pocket other end of control chamber oil groove three, carry out low pressure protection to the sealing washer of the relative one end of control oil pocket and valve rod, avoid receiving the high pressure impact of control chamber oil groove three.
In the manual control valve of the harvester, a first control cavity oil groove and a second control cavity oil groove of the first reversing control valve are communicated with a first control oil way, and a hydraulic lock is arranged on the first control oil way. The actuator is locked in a deactivated state by the provision of a hydraulic lock.
In the manual control valve of the harvester, a reel control valve rod is arranged in the reversing control valve I, and a Y-shaped oil way is formed when the reel control valve rod is positioned in the middle position. The reversing control valve adopts a Y-shaped oil way, when the reversing control valve is positioned at the middle position, the hydraulic lock can return quickly, and a hydraulic hole structure is not required to be arranged on the valve body independently.
In the manual control valve of the harvester, the reel control valve rod of the reversing control valve I is provided with the oil passing step I corresponding to the position of the control cavity oil groove III and the oil inlet groove, and the reel control valve rod of the reversing control valve I is provided with the oil passing step II corresponding to the control cavity oil groove I and the oil return groove. The Y-shaped oil path is formed when the middle position of the reversing control valve I is formed by arranging the oil passing step II.
In the manual control valve of the harvester, a gun barrel control valve rod is arranged in the reversing control valve II, and an O-shaped oil way is formed when the gun barrel control valve rod is located in the middle position.
In the manual control valve of the harvester, a first control cavity oil groove of the reversing control valve II is communicated with a second control oil port on the valve body through a second control oil path, a second control cavity oil groove is communicated with a third control oil port through a third control oil path, and a third control cavity oil groove is communicated with the transfer oil port through a transfer oil path. The second reversing control valve can supply oil to the second control oil port, the third control oil port and the switching oil port.
In the manual control valve of the harvester, a reversing control valve III is further arranged in the valve body, the reversing control valve III and the reversing control valve I are connected with an oil inlet and an oil return port of the valve body in a parallel connection mode, and a fixed orifice is arranged on a control oil port IV of the reversing control valve III. The first reversing control valve and the third reversing control valve are distributed with hydraulic oil in a parallel connection mode, so that simultaneous control of a plurality of execution mechanisms is realized.
In the manual control valve of the harvester, the reversing control valve II is connected with the oil inlet and the oil return port of the valve body in a mode of being connected with the reversing control valve I and the reversing control valve III in series. By the aid of the connection mode, the integrity of the first reversing control valve, the second reversing control valve and the third reversing control valve is better, the action of the mutual cooperation control executing mechanism can be realized, hydraulic oil is distributed more reasonably, and misoperation is prevented.
In the manual control valve of the harvester, the reversing control valve III adopts the same structure as the reversing control valve.
In the manual control valve of the harvester, a grain discharging cylinder control valve rod is arranged in the reversing control valve III, a Y-shaped oil way is formed when the grain discharging cylinder control valve rod is located in the middle position, the valve body is provided with a control cavity oil groove I and a control cavity oil groove II of the reversing control valve III are communicated with a control oil port IV through a control oil way IV, and a hydraulic lock is arranged on the control oil way IV.
Compared with the prior art, the manual control valve of the harvester has the advantages that:
1. the manual control valve of the harvester is characterized in that the first reversing control valve and the second reversing control valve are arranged in the valve body, and the first reversing control valve and the second reversing control valve are connected in series and parallel and used for controlling a plurality of execution mechanisms, so that the integration of a plurality of reversing control valves is realized, and the structure of the control valve is simplified.
2. The manual control valve of the harvester is characterized in that a fixed orifice is arranged on a first control oil way of a first reversing control valve, a small orifice is arranged on an oil inlet oil way of the first reversing control valve, and a flow pressure control valve is directly arranged on an oil supply oil way and an adapter oil way, so that the accuracy and stability of the action of an actuating mechanism controlled by the manual control valve are obviously improved.
Drawings
Fig. 1 is a hydraulic schematic diagram of the manual control valve of the harvester.
Fig. 2 is a schematic diagram of the front view of the manual control valve of the harvester.
Fig. 3 is a schematic view of the manual control valve of the harvester in a bottom view.
Fig. 4 is a schematic side view of the manual control valve of the harvester.
Fig. 5 is a schematic view of the sectional structure in the direction A-A in fig. 3.
Fig. 6 is a schematic diagram of a sectional structure in the direction B-B in fig. 3.
Fig. 7 is a schematic sectional view of the structure of fig. 3 in the direction E-E.
Fig. 8 is a schematic view of the cross-sectional structure in the direction C-C of fig. 4.
Fig. 9 is a schematic diagram of a sectional structure in the direction D-D in fig. 4.
In the figure, 1, a valve body; p, an oil inlet; t, an oil return port; BH. A first control oil port; A. a second control oil port; B. a third control oil port; C. an oil port for switching; XL, control oil port IV; 2. a reversing control valve I; 2a, controlling a first oil way; 2b, communicating an oil path; g1, reel control valve rod; 3. a reversing control valve II; 3a, an oil supply way; 3b, an oil inlet oil way; 3b1, orifice; 3c, controlling a second oil way; 3d, switching an oil way; g2, a gun barrel control valve rod; 4. a flow pressure control valve; 5. a reversing control valve III; 5a, controlling an oil way IV; g3, controlling a valve rod of the grain unloading cylinder; 6. a hydraulic lock; 7. an oil passing step I; 8. oil passing steps II; 9. a fixed orifice; 10. a main safety valve; q, controlling an oil cavity; p1, an oil inlet groove; t1, an oil return groove; a1, a first control cavity oil groove; b1, controlling a cavity oil groove II; and C1, controlling a cavity oil groove III.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The manual control valve of the harvester comprises a valve body 1, a reversing control valve I2, a reversing control valve II 3, an oil inlet P, an oil return port T, a control oil port I BH, a control oil port II A, a control oil port III B and a switching oil port C.
The embodiment describes a specific embodiment of the manual control valve of the harvester by taking a manual control valve for controlling the reel to lift, the grain discharging cylinder to lift and the gun barrel to rotate as an example. As shown in fig. 1, the manual control valve of the harvester further comprises a reversing control valve three 5, and the valve body 1 is further provided with a control oil port four XL. The reversing control valve I2, the reversing control valve II 3 and the reversing control valve III 5 are integrally arranged in the valve body 1, the reversing control valve I2 and the reversing control valve II 3 are connected with the oil inlet P and the oil return port T in a serial-parallel connection mode, and the reversing control valve I2 and the reversing control valve III 5 are connected with the oil inlet P and the oil return port T in a parallel connection mode. In the preferred embodiment, the second reversing control valve 3 is connected to the oil inlet P and the oil return port T of the valve body 1 in series with the first reversing control valve 2 and the third reversing control valve 5. And a main safety valve 10 is further arranged between the oil inlet P and the oil return port T, and the main safety valve 10 is an overflow valve.
As shown in fig. 2, 3 and 5, a control oil path 1 a of the reversing control valve 1 2 can be communicated with a control oil port BH on the valve body 1, so that the reversing control valve 2 can be used for controlling the reel to lift. As shown in fig. 2, 3, 4 and 6, a second control oil path 3C and a third control oil path (not shown in the drawings) of the second reversing control valve 3 can be respectively communicated with a second control oil port a and a third control oil port B on the valve body 1, and a transfer oil path 3d of the second reversing control valve 3 is communicated with a transfer oil port C on the valve body 1, so that the second reversing control valve 3 can be used for controlling the rotation of the gun barrel and outputting hydraulic oil paths for connecting other control valve modules. As shown in fig. 2, 3 and 7, the control oil way four of the reversing control valve three 5 can be communicated with the control oil port four XL on the valve body 1, so that the reversing control valve three 5 can be used for controlling the grain unloading cylinder to lift.
As shown in fig. 5, 6 and 7, the reversing control valve 1, the reversing control valve 2 and the reversing control valve 3 respectively comprise a control oil cavity Q, an oil inlet groove P1, an oil return groove T1, a control cavity oil groove A1, a control cavity oil groove B1 and a control cavity oil groove tri-C1 are arranged in the control oil cavity Q, the number of the oil inlet grooves P1 is two, one oil inlet groove P1 is positioned at a position adjacent to the control cavity oil groove tri-C1, and the other oil inlet groove P1 is positioned at one side adjacent to the control cavity oil groove A1 and the control cavity oil groove B1; the other sides of the first control cavity oil groove A1 and the second control cavity oil groove B1 are respectively provided with an oil return groove T1. The reel control valve rod G1 is arranged in the control oil cavity Q of the reversing control valve I2, the gun barrel control valve rod G2 is arranged in the control oil cavity Q of the reversing control valve II 3, the grain discharging barrel control valve rod G3 is arranged in the control oil cavity Q of the reversing control III, and the reel control valve rod G1, the gun barrel control valve rod G2 and the grain discharging barrel control valve rod G3 can all be communicated or blocked along the corresponding control oil cavity Q in a sliding mode, so that the executing mechanism is driven to act.
As shown in fig. 5, 6 and 7, as a preferred scheme, the first control cavity oil groove A1 is centered, the second control cavity oil groove B1 and the third control cavity oil groove C1 are respectively positioned at two sides of the first control cavity oil groove A1, the oil return groove T1 adjacent to the second control cavity oil groove B1 is positioned at one end of the control oil cavity Q, and the other end of the control oil cavity Q is also provided with an oil return groove T1 adjacent to the third control cavity oil groove C1; through setting up the oil return groove T1 in the position department that control chamber oil groove three C1 is close to the control oil pocket Q other end, carry out low pressure protection to the sealing washer of the relative one end of control oil pocket Q and control valve rod, avoid receiving the high pressure impact of control chamber oil groove three C1.
As shown in fig. 5 and 7, the third reversing control valve 5 has substantially the same structure as the second reversing control valve 3. The position of the control valve rod of the reversing control valve I2 corresponding to the control cavity oil groove three C1 and the oil inlet groove P1 is provided with an oil passing step I7, and the position of the control valve rod of the reversing control valve I2 corresponding to the control cavity oil groove I A1 and the oil return groove T1 is provided with an oil passing step II 8. The oil feeding path when the oil groove three C1 of the control cavity is communicated with the oil feeding groove P1 is enlarged by arranging the oil feeding step I7, and the Y-shaped oil path is formed when the reversing control valve I2 is in the middle position by arranging the oil feeding step II 8. The first control cavity oil groove A1 and the second control cavity oil groove B1 of the reversing control valve I2 are communicated with the first control oil way 2a through the hydraulic lock 6, the first control cavity oil groove A1 is connected with the oil inlet end of the groove of the hydraulic lock 6, and the second control cavity oil groove B1 is connected with the control end of the hydraulic lock 6. The grain discharging cylinder control valve rod G3 of the reversing control valve III 5 also forms a Y-shaped oil way when being positioned in the middle position, the valve body 1 is provided with a control cavity oil groove A1 and a control cavity oil groove B1 of the reversing control valve III 5, the control cavity oil groove A1 and the control cavity oil groove B1 are communicated with a control oil port IV XL through a control oil way IV, and the control oil way IV is also provided with a hydraulic lock 6. The first control oil passage 2a and the fourth control oil passage are provided with fixed orifices 9.
As shown in fig. 5, the first reversing control valve 2 is further provided with a communication oil passage 2b for communicating with the second reversing control valve 3. In this embodiment, the third reversing valve 5 is also provided with a communication oil passage 2b for communicating with the second reversing valve 3. The communication oil way 2b on the first reversing control valve 2 is connected with the oil groove three C1 of the control cavity of the third reversing control valve 5, and then is communicated with the second reversing control valve 3 through the communication oil way 2b on the first reversing control valve 2, so that the serial-parallel connection of the second reversing control valve 3 with the first reversing control valve 2 and the third reversing control valve 5 is realized.
As shown in fig. 6, the barrel control valve stem G2 of the second reversing control valve 3 forms an O-shaped oil path when being located at the middle position. As shown in fig. 8 and 9, the second reversing control valve 3 has an oil supply passage 3a for communicating with the communicating oil passage 2b and an oil intake passage 3b for communicating with the oil supply passage 3a, a throttle orifice 3b1 is provided in the oil intake passage 3b, and the oil supply passage 3a and the switching passage 3d are connected by the flow pressure control valve 4. The first control cavity oil groove A1 of the reversing control valve II 3 is communicated with the second control oil port A on the valve body 1 through the second control oil path 3C, the second control cavity oil groove B1 is communicated with the third control oil port B through the third control oil path (not shown in the figure), and the third control cavity oil groove C1 is communicated with the switching oil port C through the switching oil path 3 d. The second reversing control valve 3 can supply oil to the second control oil port A, the third control oil port B and the switching oil port C.
The manual control valve of the harvester integrates a plurality of reversing control valves in the valve body 1, can control actions of a plurality of execution mechanisms such as a reel, a grain discharging cylinder, a gun barrel and the like of the harvester, has higher integration level, and simplifies connecting pipelines by connecting all reversing control valves through oil ways in the valve body 1. The manual control valve of the harvester further comprises a throttle small hole 3b1 arranged on an oil inlet oil path 3b of a second reversing control valve 3, and a flow pressure control valve 4 directly arranged on an oil supply oil path 3a and an adapter oil path 3d, so that the pressure difference between an inlet and an outlet of the throttle small hole 3b1 is constant. When the second reversing control valve 3 reverses, the flow of the oil inlet oil path 3b gradually changes from small to large until the constant flow of the throttle orifice 3b1 is reached. Therefore, the flow rates of the second control oil way 3c and the third control oil way (not shown in the figure) of the reversing control valve II 3 are precisely controlled, fluctuation is reduced, precise control of the actuating mechanism is achieved, and the stability of the action of the actuating mechanism is obviously improved. In addition, by providing the fixed orifice 9 in the first control oil passage 2a of the first reversing control valve 2, the flow rate of the first control oil passage 2a can be controlled, the impact phenomenon caused by excessive oil supply can be avoided, and the stability of the actuator controlled by the first reversing control valve 2 can be further improved.
The reversing valve in the manual control valve of the harvester is provided with the plurality of oil inlet grooves P1 and the plurality of oil return grooves T1, when in the middle position, the oil inlet grooves P1 and the three C1 of the oil grooves of the control cavity pass through the grooves of the control valve rod, the flow area is larger than that of the oil passing inside the control valve rod, and the pressure loss of the middle position is reduced. Meanwhile, the speed regulating area of the reversing valve is longer, so that the operation of the actuating mechanism is more stable, and the impact phenomenon is avoided.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The manual control valve of the harvester comprises a valve body (1), wherein an oil inlet (P) and an oil return port (T) are formed in the valve body (1), a reversing control valve I (2) and a reversing control valve II (3) are arranged in the valve body (1), and the manual control valve is characterized in that the reversing control valve I (2) and the reversing control valve II (3) are connected with the oil inlet (P) and the oil return port (T) in a serial-parallel connection mode, and a control oil port I (BH), a control oil port II (A), a control oil port III (B) and an switching oil port (C) are further formed in the valve body (1); the control oil way I (2 a) of the reversing control valve I (2) can be communicated with the control oil port I (BH) on the valve body (1), a fixed orifice (9) is arranged on the control oil way I (2 a), and the reversing control valve I (2) is also provided with a communication oil way (2 b) which is used for being communicated with the reversing control valve II (3); the reversing control valve II (3) is provided with an oil supply oil way (3 a) communicated with the communicating oil way (2B) and an oil inlet oil way (3B) communicated with the oil supply oil way (3 a), a throttle small hole (3B 1) is formed in the oil inlet oil way (3B), the control oil way II (3C) and the control oil way III of the reversing control valve II (3) can be communicated with the control oil port II (A) and the control oil port III (B) on the valve body (1) respectively, the reversing control valve II (3) is further provided with a switching oil way (3 d) communicated with the switching oil port (C) on the valve body (1), and the oil supply oil way (3 a) and the switching oil way (3 d) are connected through the flow pressure control valve (4).
2. The manual control valve of a harvester according to claim 1, wherein the reversing control valve one (2) and the reversing control valve two (3) comprise a control oil cavity (Q), an oil inlet groove (P1), an oil return groove (T1), a control cavity oil groove one (A1), a control cavity oil groove two (B1) and a control cavity oil groove three (C1) are arranged in the control oil cavity (Q), the number of the oil inlet grooves (P1) is two, one oil inlet groove (P1) is positioned at a position adjacent to the control cavity oil groove three (C1), and the other oil inlet groove (P1) is positioned at one side adjacent to the control cavity oil groove one (A1) and the control cavity oil groove two (B1); the other sides of the first control cavity oil groove (A1) and the second control cavity oil groove (B1) are respectively provided with an oil return groove (T1).
3. The manual control valve of a harvester according to claim 2, wherein the first control cavity oil groove (A1) is located centrally, the second control cavity oil groove (B1) and the third control cavity oil groove (C1) are located at two sides of the first control cavity oil groove (A1), the oil return groove (T1) adjacent to the second control cavity oil groove (B1) is located at one end of the control oil cavity (Q), and the other end of the control oil cavity (Q) is further provided with an oil return groove (T1) adjacent to the third control cavity oil groove (C1).
4. A harvester manual control valve according to claim 2 or 3, characterized in that the control chamber oil groove one (A1) and the control chamber oil groove two (B1) of the reversing control valve one (2) are communicated with the control oil way one (2 a), and the control oil way one (2 a) is provided with a hydraulic lock (6).
5. A harvester manual control valve according to claim 2 or 3, characterized in that a reel control valve rod (G1) is arranged in the reversing control valve 1 (2), and the reel control valve rod (G1) forms a Y-shaped oil path when being located at the middle position.
6. The manual control valve of a harvester according to claim 5, wherein the reel control valve rod (G1) of the reversing control valve 1 (2) is provided with an oil passing step one (7) corresponding to the positions of the control cavity oil groove three (C1) and the oil inlet groove (P1), and the reel control valve rod (G1) of the reversing control valve 1 (2) is provided with an oil passing step two (8) corresponding to the control cavity oil groove one (A1) and the oil return groove (T1).
7. A harvester manual control valve according to claim 2 or 3, characterized in that a gun barrel control valve rod (G2) is arranged in the reversing control valve two (3), and the gun barrel control valve rod (G2) forms an O-shaped oil path when being located at the middle position.
8. The manual control valve of a harvester according to claim 7, wherein a first control cavity oil groove (A1) of the second reversing control valve (3) is communicated with a second control oil port (A) on the valve body (1) through a second control oil path (3C), a second control cavity oil groove (B1) is communicated with a third control oil port (B) through a third control oil path, and a third control cavity oil groove (C1) is communicated with the switching oil port (C) through a switching oil path (3 d).
9. A manual control valve for a harvester according to claim 1, 2 or 3, characterized in that the valve body (1) is also internally provided with a reversing control valve III (5), the reversing control valve III (5) and the reversing control valve I (2) are connected with an oil inlet (P) and an oil return port (T) of the valve body (1) in a parallel manner, and a fixed orifice (9) is arranged on a control oil port IV (XL) of the reversing control valve III (5).
10. A manual control valve for a harvester according to claim 1, 2 or 3, characterized in that the second reversing valve (3) is connected to the oil inlet (P) and the oil return (T) of the valve body (1) in series with the first reversing valve (2) and the third reversing valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883978.0A CN107420367B (en) | 2017-09-26 | 2017-09-26 | Manual control valve of harvester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883978.0A CN107420367B (en) | 2017-09-26 | 2017-09-26 | Manual control valve of harvester |
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| Publication Number | Publication Date |
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| CN107420367A CN107420367A (en) | 2017-12-01 |
| CN107420367B true CN107420367B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710883978.0A Active CN107420367B (en) | 2017-09-26 | 2017-09-26 | Manual control valve of harvester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7134788B2 (en) * | 2018-08-27 | 2022-09-12 | ナブテスコ株式会社 | Direction switching valve device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5397191B2 (en) * | 2009-11-27 | 2014-01-22 | 井関農機株式会社 | Combine hydraulic circuit |
| DE102013206973A1 (en) * | 2013-04-18 | 2014-10-23 | Robert Bosch Gmbh | control arrangement |
| CN103742682B (en) * | 2014-01-24 | 2017-01-25 | 浙江海宏液压科技股份有限公司 | Multiway valve for harvesters |
| CN103727267B (en) * | 2014-01-24 | 2016-02-10 | 浙江海宏液压科技股份有限公司 | Reaper multi-way valve |
| CN204436913U (en) * | 2014-12-22 | 2015-07-01 | 浙江海宏液压科技股份有限公司 | A kind of agricultural machinery control valve |
| CN204533019U (en) * | 2015-01-30 | 2015-08-05 | 浙江海宏液压科技股份有限公司 | A kind of control multi-way valve of reaper |
| CN106194880B (en) * | 2016-08-30 | 2017-12-01 | 浙江海宏液压科技股份有限公司 | A kind of control valve group of harvester |
| CN206323791U (en) * | 2016-12-23 | 2017-07-14 | 江苏沃得农业机械有限公司 | Harvester header and winder hydraulic integrated control system |
| CN207246148U (en) * | 2017-09-26 | 2018-04-17 | 浙江海宏液压科技股份有限公司 | A kind of harvester hand control valve |
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