CN111336143A - Fruit tree pruning system based on hydraulic control - Google Patents
Fruit tree pruning system based on hydraulic control Download PDFInfo
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- CN111336143A CN111336143A CN202010088615.XA CN202010088615A CN111336143A CN 111336143 A CN111336143 A CN 111336143A CN 202010088615 A CN202010088615 A CN 202010088615A CN 111336143 A CN111336143 A CN 111336143A
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a fruit tree pruning system based on hydraulic control, which solves the problems of high system temperature rise and low production efficiency in the prior art, and has the effects of convenient and flexible operation and improvement on pruning efficiency; the technical scheme is as follows: the hydraulic system comprises a power unit, an execution unit and a control unit, wherein the power unit is used for providing a hydraulic oil source and converting mechanical energy of a power output device into hydraulic energy; the execution unit comprises a motor and a plurality of hydraulic oil cylinders; the control unit comprises a monostable valve and an electromagnetic multi-way valve, the monostable valve divides hydraulic oil injected by the power unit into a constant-flow oil way and a shunt oil way, the constant-flow oil way provides an oil source for the hydraulic oil cylinders, and the action direction and the pressure of each hydraulic oil cylinder are respectively controlled by the electromagnetic multi-way valve; the shunt oil circuit performs unidirectional rotation operation and overload protection control on the motor through the electromagnetic multi-way valve; the trimming device is controlled by the execution unit to complete the trimming action.
Description
Technical Field
The invention relates to the technical field of hydraulic control, in particular to a fruit tree pruning system based on hydraulic control.
Background
Fruit tree pruning is an important technical measure in orchard production management, and reasonable pruning plays a vital role in improving the fruit tree yield, prolonging the fruiting life and improving the fruit quality. In recent years, with the establishment of novel dwarfing wide-row close planting orchards, a road is opened up for the mechanized management of orchard production, and devices such as mowers, sprayers and the like are widely applied. However, fruit tree pruning is mainly manual pruning, the technical level of mechanical pruning equipment is low, and the fruit tree pruning equipment has a large gap compared with developed countries in Europe and America, cannot meet the production requirements of large-scale orchards, and seriously restricts the development process of whole-process mechanical management of the orchards.
The inventor finds that the prior art discloses a hydraulic system of a trimmer, which comprises an oil tank, a plunger variable pump, a first pressure reducing valve, a first electromagnetic directional valve, a first hydraulic control one-way valve, a first hydraulic oil cylinder and the like, and the remote control is realized by arranging the electromagnetic directional valve in the system. However, this system has the following problems: (1) when the electromagnetic valve is in the middle position, the system overflows through the pressure reducing valve, and the temperature of the system is increased too fast due to large heat power loss; (2) when the oil cylinder stretches, the rotating speed of the motor is unstable, and the trimming effect is affected.
Disclosure of Invention
Aiming at the problems of instability of a control system, high thermal power loss, low production efficiency and the like in the existing fruit tree pruning management, the invention aims to provide a fruit tree pruning system based on hydraulic control, which is convenient and flexible to operate and can drive a fruit tree pruning machine in a full hydraulic mode.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the embodiment of the invention provides a fruit tree pruning system based on hydraulic control, which comprises a hydraulic system and a pruning device, wherein the hydraulic system comprises a power unit, an execution unit and a control unit, the power unit is used for providing a hydraulic oil source and changing the mechanical energy of a power output device into hydraulic energy;
the execution unit comprises a motor and a plurality of hydraulic oil cylinders; the control unit comprises a monostable valve and an electromagnetic multi-way valve, the monostable valve divides hydraulic oil injected by the power unit into a constant-flow oil way and a shunt oil way, the constant-flow oil way provides an oil source for the hydraulic oil cylinders, and the action direction and the pressure of each hydraulic oil cylinder are respectively controlled by the electromagnetic multi-way valve; the shunt oil circuit performs unidirectional rotation operation and overload protection control on the motor through the electromagnetic multi-way valve;
the trimming device is controlled by the execution unit to complete the trimming action.
In a further implementation mode, the constant-flow oil path is connected with a port P1 of the electromagnetic multi-way valve through a port A of the monostable valve, and the shunt oil path is connected with a port P2 of the electromagnetic multi-way valve through a port B of the monostable valve.
As a further implementation manner, the electromagnetic multi-way valve comprises an electromagnetic valve a, an electromagnetic valve B, an electromagnetic valve C, an electromagnetic valve D, an electromagnetic valve E, an electromagnetic valve F, an electromagnetic valve G connected with a port P1, and an electromagnetic valve H connected with a port P2, wherein an output end of the electromagnetic valve H is connected with a motor, and output ends of the electromagnetic valve a, the electromagnetic valve B, the electromagnetic valve C, the electromagnetic valve D, the electromagnetic valve E, the electromagnetic valve F, and the electromagnetic valve G are respectively connected with a hydraulic oil cylinder.
As a further implementation manner, the electromagnetic valve a, the electromagnetic valve B, the electromagnetic valve C, the electromagnetic valve D, the electromagnetic valve E, the electromagnetic valve F and the electromagnetic valve G are connected with the safety valve a in parallel, and the electromagnetic valve B is connected with the main arm lifting oil cylinder through a balance valve; the electromagnetic valve C is connected with the swing oil cylinder sequentially through the constant flow valve and the balance valve, and the electromagnetic valve D is connected with the side shift oil cylinder. The electromagnetic valve E is connected with the angle adjusting oil cylinder through a constant flow valve and a hydraulic lock respectively, the electromagnetic valve F is connected with the upper adjusting oil cylinder through a constant flow valve and a hydraulic lock respectively, and the electromagnetic valve G is connected with the lower adjusting oil cylinder through a constant flow valve and a hydraulic lock respectively. The input end of the electromagnetic valve H is connected with the safety valve B in parallel, and the output end of the electromagnetic valve H is connected with the motors.
As a further implementation mode, the power unit comprises a gearbox, a gear pump and an oil tank, the gear pump is fixedly connected with the gearbox, and the gearbox is fixed on the side face of the oil tank. The oil tank comprises a tank body, an oil absorption fine filter, an oil return filter, an air filter and a liquid level meter, wherein the oil absorption fine filter, the oil return filter, the air filter and the liquid level meter are arranged in the tank body; the oil suction fine filter is connected with a P port of the monostable valve through a gear pump, and the return oil filter is connected with the output end of the electromagnetic multi-way valve.
As a further implementation, the trimming means comprises an upper trimming means, a middle trimming means and a lower trimming means, the upper trimming means being pivotally connected to a top end of the middle trimming means, the lower trimming means being pivotally connected to a bottom end of the middle trimming means; the upper trimming device and the lower trimming device respectively adjust the angle with the middle trimming device through hydraulic cylinders.
As a further realization, the upper, middle and lower trimming means each comprise a plurality of trimming knives connected to a motor by a transmission.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
(1) according to one or more embodiments of the invention, a monostable valve is arranged, the monostable valve divides hydraulic oil injected into a system by a power unit into two paths, the two paths comprise a constant-flow oil path and a shunt oil path, the constant-flow oil path enters a port P1 of an electromagnetic multi-way valve through a port A of the monostable valve, an oil source is provided for a hydraulic oil cylinder of the whole machine, and the action direction and the pressure of each oil cylinder are respectively controlled through the electromagnetic multi-way valve; the shunt oil way enters a port P2 of the electromagnetic multi-way valve through a port B of the monostable valve, and the motors of the whole machine are subjected to unidirectional rotation operation and overload protection control through the electromagnetic multi-way valve; the oil cylinder and the motor oil way are separately controlled, so that the rotating speed of the motor is stable when the oil cylinder is adjusted, and the trimming effect is not influenced;
(2) one or more embodiments of the invention are provided with a constant flow valve, a balance valve and a hydraulic lock, wherein the constant flow valve is mainly used for limiting the flow of a system loop and controlling the speed of the related oil cylinder of the whole machine without being influenced by the load of the oil cylinder; the balance valve enables the working speed of the related hydraulic oil cylinder to be always in a controlled state, and the work speed is not influenced by external working condition changes, so that the stable and reliable operation of the pruning machine is ensured; the hydraulic lock is used for sealing oil in the large cavity and the small cavity of the hydraulic oil cylinder so as to lock the static position of the related hydraulic oil cylinder;
(3) the hydraulic system of one or more embodiments of the invention has reasonable design, effectively solves the problem of rapid temperature rise of the system, and prolongs the service life of hydraulic elements; full-hydraulic automatic adjustment is adopted, wide combined profiling pruning is realized, and the requirements of pruning height, pruning tree shape and pruning uniformity of different fruit trees can be met; the device has the technical advantages of compact spatial layout, high efficiency, temperature rise reduction and easy heat dissipation; flexible and convenient operation and stable and reliable performance.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic illustration of a hydraulic system according to one or more embodiments of the present disclosure;
FIG. 2 is a schematic view of a trimming device according to one or more embodiments of the present invention;
wherein, 1, a gearbox; 2, a gear pump; 3. an oil tank; 3.1, an oil absorption fine filter; 3.2, an oil return filter; 3.3, an air filter; 3.4, a liquid level meter; 4. a monostable valve; 5. an electromagnetic multi-way valve; 5.1, an electromagnetic valve A; 5.2, a safety valve A; 5.3, a safety valve B; 5.4, an electromagnetic valve B; 5.5, an electromagnetic valve C; 5.6, an electromagnetic valve D; 5.7, an electromagnetic valve E; 5.8, an electromagnetic valve F; 5.9, an electromagnetic valve H; 5.10, an electromagnetic valve G; 6. a constant flow valve; 7. a balancing valve; 8. hydraulic locking; 9. a motor; 10. a main arm lifting oil cylinder; 11. a swing oil cylinder; 12. a lateral shifting oil cylinder; 13. an angle adjusting oil cylinder; 14. an upper adjusting oil cylinder; 15. a lower adjusting oil cylinder 16, an upper trimming device 17, a middle trimming device 18, a lower trimming device 19, a vertical beam 20, a cross beam 21, a cross beam bracket 22 and a support.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Interpretation of terms:
the main arm lifting oil cylinder, the swinging oil cylinder, the side shifting oil cylinder, the angle adjusting oil cylinder, the upper adjusting oil cylinder and the lower adjusting oil cylinder are named functionally, and the structures of the oil cylinders are not limited.
The first embodiment is as follows:
the invention is described in detail below with reference to fig. 1-2, and specifically, the structure is as follows:
the embodiment provides a fruit tree pruning system based on hydraulic control, a hydraulic system and a pruning device, wherein the hydraulic system comprises a power unit, a control unit and an execution unit, wherein the power unit provides a required hydraulic oil source for the system and changes the mechanical energy of a power output device into hydraulic energy. The power unit comprises a gearbox 1, a gear pump 2, an oil tank 3 and the like. The control unit comprises a monostable valve 4, an electromagnetic multi-way valve 5, a constant flow valve 6, a balance valve 7, a hydraulic lock 8 and the like. The execution unit comprises a motor 9, a main arm lifting oil cylinder 10, a swinging oil cylinder 11, a side shifting oil cylinder 12, an angle adjusting oil cylinder 13, an upper adjusting oil cylinder 14 and a lower adjusting oil cylinder 15. The trimming means comprise an upper trimming means 16, a middle trimming means 17 and a lower trimming means 18.
Specifically, as shown in fig. 1, the gear pump 2 is fixedly connected with the gearbox 1 through a bolt, and the gearbox 1 is fixed on the side of the oil tank 3 through a bolt and is connected with the tractor PTO through a transmission shaft. The oil tank 3 is fixed on a three-point suspension of the tractor. The oil tank 3 comprises a tank body, an oil absorption fine filter 3.1, an oil return oil filter 3.2, an air filter 3.3 and a liquid level meter 3.4, wherein the oil absorption fine filter 3.1, the oil return oil filter 3.2 and the liquid level meter are arranged in the tank body, the oil absorption fine filter 3.1 is connected with the input end of the control unit through a gear pump 2, and the oil return oil filter 3.2 is connected with the output end of the control.
The monostable valve 4 divides hydraulic oil injected into the system by the power unit into two paths, including a constant flow oil path and a shunt oil path. The constant-flow oil way enters a port P1 of the electromagnetic multi-way valve 5 through a port A of the monostable valve 4 to provide an oil source for a hydraulic oil cylinder of the whole machine and respectively control the action direction and the pressure of each oil cylinder through the electromagnetic multi-way valve 5. The shunting oil path enters a port P2 of the electromagnetic multi-way valve 5 through a port B of the monostable valve 4, and the unidirectional rotation operation and the overload protection control are carried out on each motor 9 of the whole machine through the electromagnetic multi-way valve 5.
Further, the electromagnetic multi-way valve 5 comprises an electromagnetic valve A5.1 connected with a port P1, an electromagnetic valve B5.4, an electromagnetic valve C5.5, an electromagnetic valve D5.6, an electromagnetic valve E5.7, an electromagnetic valve F5.8, an electromagnetic valve G5.10 and an electromagnetic valve H5.9 connected with a port P2. The electromagnetic valve B5.4 is used for controlling the main arm lifting oil cylinder 10, the electromagnetic valve C5.5 is used for controlling the swinging oil cylinder 11, the electromagnetic valve D5.6 is used for controlling the side shifting oil cylinder 12, the electromagnetic valve E5.7 is used for controlling the angle adjusting oil cylinder 13, the electromagnetic valve F5.8 is used for controlling the upper adjusting oil cylinder 14, and the electromagnetic valve G5.10 is used for controlling the lower adjusting oil cylinder 15.
The electromagnetic valve A5.1, the electromagnetic valve B5.4, the electromagnetic valve C5.5, the electromagnetic valve D5.6, the electromagnetic valve E5.7, the electromagnetic valve F5.8 and the electromagnetic valve G5.10 are connected with the safety valve A5.2 in parallel, and the electromagnetic valve A5.1 is connected with the return oil filter 3.2. The input side of the electromagnetic valve H5.9 is connected with a safety valve B5.3 in parallel, the output end of the electromagnetic valve H5.9 is connected with a plurality of motors 9, and the motors 9 transmit power through a coupler, a driving shaft, a belt wheel, a synchronous belt and a driven shaft to drive the pruning knife to rotate at a high speed so as to complete pruning operation.
The electromagnetic valve B5.4 is connected with a main arm lifting oil cylinder 10 through a balance valve 7, and the main arm lifting oil cylinder 10 is used for controlling the height adjustment of the trimming device; the balance valve 7 enables the working speed of the main arm lifting oil cylinder 10 to be in a controlled state all the time, and the influence of external working condition change is avoided, so that the stable and reliable operation of the pruning machine is ensured. The electromagnetic valve C is connected with a swing oil cylinder 11 through a constant flow valve 6 and a balance valve 7, and the swing oil cylinder 11 is used for controlling the trimming device and adjusting the left-right swing angle of the rack. The balance valve 7 enables the working speed of the swing oil cylinder 11 to be in a controlled state all the time and is not influenced by external working condition changes; the constant flow valve 6 is used for limiting the flow of a system loop and controlling the speed of the swing oil cylinder 11, and is not influenced by the load of the swing oil cylinder 11.
The electromagnetic valve D5.6 is connected with a side shifting oil cylinder 12, and the side shifting oil cylinder 12 is used for controlling the adjustment of the left and right horizontal distance of the trimming device. The electromagnetic valve E5.7 is connected with an angle adjusting oil cylinder 13 through the constant flow valve 6 and the hydraulic lock 8, and the angle adjusting oil cylinder 13 is used for controlling the angle adjustment of the trimming device.
The electromagnetic valve F5.8 is connected with an upper adjusting oil cylinder 14 through a constant flow valve 6 and a hydraulic lock 8, and the upper adjusting oil cylinder 14 is used for controlling the angle adjustment of the trimming device at the upper part. The electromagnetic valve G5.10 is connected with a lower adjusting oil cylinder 15 through a constant flow valve 6 and a hydraulic lock 8, and the lower adjusting oil cylinder 15 is used for controlling the angle adjustment of the pruning device at the lower part. The hydraulic lock can seal oil in the large and small cavities of the angle adjusting oil cylinder 13, the upper adjusting oil cylinder 14 and the lower adjusting oil cylinder 15, so that the static positions of the related hydraulic oil cylinders are locked.
As shown in fig. 2, the intermediate trimming means 17 is arranged in a vertical direction, the upper trimming means 16 is hinged to the top end of the intermediate trimming means 17, and the lower trimming means 18 is hinged to the bottom end of the intermediate trimming means 17. The upper adjusting cylinder 14 is installed at the rear side of the middle trimming device 17, and the movable end thereof is connected with the upper trimming device 16, and the relative angle between the upper trimming device 16 and the middle trimming device 17 is adjusted by the upper adjusting cylinder 14. The lower adjusting cylinder 15 is installed at the rear side of the middle trimming device 17, and the movable end thereof is connected with the lower trimming device 18, and the relative angle between the lower trimming device 18 and the middle trimming device 17 is adjusted by the lower adjusting cylinder 15.
The middle trimming device 17 is connected with the cross beam 20 through a support 22, the support 22 is a hinged support, the support 22 is connected with the angle adjusting oil cylinder 13, and the angle of the trimming device is adjusted through the angle adjusting oil cylinder 13. The beam 20 horizontally penetrates through the beam support 21, the side shifting oil cylinder 12 is connected between the beam support 21 and the support 22, and the horizontal telescopic distance of the beam 20 is adjusted through the side shifting oil cylinder 12.
The beam support 21 is vertically penetrated with a vertical beam 19, and the bottom end of the vertical beam 19 is connected with a base and welded. The main arm lifting oil cylinder 10 is connected between the cross beam support 21 and the base welding part, and the height of the cross beam support 21 is adjusted through the main arm lifting oil cylinder 10. The vertical beam 19 is welded and hinged with the base, and the swing angle of the vertical beam 19 is adjusted through the swing oil cylinder 11 arranged on the side surface of the vertical beam 19.
The upper trimming device 16, the middle trimming device 17, and the lower trimming device 18 have the same structure, and each include a plurality of trimming blades, which are connected to the motor 9 through a transmission mechanism, and are driven to rotate by the motor 9. In this embodiment, the transmission mechanism is a synchronous belt mechanism.
The oil cylinder of this embodiment is controlled separately from the oil path of the motor 9, so that the rotating speed of the motor is stable when the oil cylinder is adjusted, and the trimming effect is not affected. This embodiment hydraulic system reasonable in design has effectually solved the fast problem of system temperature rise, has prolonged hydraulic component's life. The full-hydraulic automatic adjustment is adopted, so that the requirements of pruning height, tree shape and trimming uniformity of different fruit trees can be met.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A fruit tree pruning system based on hydraulic control is characterized by comprising a hydraulic system and a pruning device, wherein the hydraulic system comprises a power unit, an execution unit and a control unit, the power unit is used for providing a hydraulic oil source and converting mechanical energy of a power output device into hydraulic energy;
the execution unit comprises a motor and a plurality of hydraulic oil cylinders; the control unit comprises a monostable valve and an electromagnetic multi-way valve, the monostable valve divides hydraulic oil injected by the power unit into a constant-flow oil way and a shunt oil way, the constant-flow oil way provides an oil source for the hydraulic oil cylinders, and the action direction and the pressure of each hydraulic oil cylinder are respectively controlled by the electromagnetic multi-way valve; the shunt oil circuit performs unidirectional rotation operation and overload protection control on the motor through the electromagnetic multi-way valve;
the trimming device is controlled by the execution unit to complete the trimming action.
2. The fruit tree pruning system based on hydraulic control as claimed in claim 1, wherein the constant flow oil path is connected to port P1 of the electromagnetic multi-way valve through port a of the monostable valve, and the branch flow oil path is connected to port P2 of the electromagnetic multi-way valve through port B of the monostable valve.
3. The fruit tree pruning system based on hydraulic control as claimed in claim 2, wherein the solenoid multi-way valve comprises solenoid valve A, solenoid valve B, solenoid valve C, solenoid valve D, solenoid valve E, solenoid valve F, solenoid valve G connected with port P1, and solenoid valve H connected with port P2,
the output end of the electromagnetic valve H is connected with the motor, and the output ends of the electromagnetic valve A, the electromagnetic valve B, the electromagnetic valve C, the electromagnetic valve D, the electromagnetic valve E, the electromagnetic valve F and the electromagnetic valve G are respectively connected with the hydraulic oil cylinder.
4. The fruit tree pruning system based on hydraulic control as claimed in claim 3, wherein the solenoid valve A, the solenoid valve B, the solenoid valve C, the solenoid valve D, the solenoid valve E, the solenoid valve F and the solenoid valve G are connected with the safety valve A in parallel, and the solenoid valve B is connected with the main arm lift cylinder through a balance valve; the electromagnetic valve C is connected with the swing oil cylinder sequentially through the constant flow valve and the balance valve, and the electromagnetic valve D is connected with the side shift oil cylinder.
5. The fruit tree pruning system based on hydraulic control according to claim 3, wherein the solenoid valve E is connected with the angle adjusting cylinder through a constant flow valve and a hydraulic lock respectively, the solenoid valve F is connected with the upper adjusting cylinder through a constant flow valve and a hydraulic lock respectively, and the solenoid valve G is connected with the lower adjusting cylinder through a constant flow valve and a hydraulic lock respectively.
6. The fruit tree pruning system based on hydraulic control as claimed in claim 3, wherein the input end of the solenoid valve H is connected with the safety valve B in parallel, and the output end of the solenoid valve H is connected with a plurality of motors.
7. The fruit tree pruning system based on hydraulic control of claim 1, wherein the power unit comprises a gearbox, a gear pump and an oil tank, the gear pump is fixedly connected with the gearbox, and the gearbox is fixed on the side surface of the oil tank.
8. The fruit tree pruning system based on hydraulic control as claimed in claim 7, wherein the oil tank comprises a tank body, and an oil suction fine filter, an oil return filter, an air filter and a liquid level meter which are arranged inside the tank body; the oil suction fine filter is connected with a P port of the monostable valve through a gear pump, and the return oil filter is connected with the output end of the electromagnetic multi-way valve.
9. The hydraulic control-based fruit tree pruning system according to claim 1, wherein the pruning device comprises an upper pruning device, a middle pruning device and a lower pruning device, the upper pruning device is rotatably connected to the top end of the middle pruning device, and the lower pruning device is rotatably connected to the bottom end of the middle pruning device; the upper trimming device and the lower trimming device respectively adjust the angle with the middle trimming device through hydraulic cylinders.
10. The fruit tree pruning system based on hydraulic control of claim 9, wherein the upper, middle and lower pruning devices each comprise a plurality of pruning shears, the pruning shears being connected to a motor through a transmission mechanism.
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| CN202010088615.XA CN111336143A (en) | 2020-02-12 | 2020-02-12 | Fruit tree pruning system based on hydraulic control |
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| CN202010088615.XA CN111336143A (en) | 2020-02-12 | 2020-02-12 | Fruit tree pruning system based on hydraulic control |
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Application publication date: 20200626 |