CN114718936A - Hydraulic control system, control method and garbage truck - Google Patents
Hydraulic control system, control method and garbage truck Download PDFInfo
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- CN114718936A CN114718936A CN202210489193.6A CN202210489193A CN114718936A CN 114718936 A CN114718936 A CN 114718936A CN 202210489193 A CN202210489193 A CN 202210489193A CN 114718936 A CN114718936 A CN 114718936A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
- B65F3/02—Vehicles particularly adapted for collecting refuse with means for discharging refuse receptacles thereinto
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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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
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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
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Refuse-Collection Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control system, a control method and a garbage truck, wherein the hydraulic control system comprises a support oil cylinder, a lifting oil cylinder, a control valve group and a controller, and the control valve group is electrically connected with the controller; the controller can acquire the telescopic position information of the supporting leg oil cylinder, and when the supporting leg oil cylinder extends to a supporting position, the controller controls the control valve group to act so that the lifting oil cylinder extends to perform garbage dumping operation; the controller can acquire the telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to the initial position, the controller controls the control valve group to act so that the supporting leg oil cylinder is reset to achieve the effect that garbage dumping is completed and reset operation is completed. Compared with the prior art, the hydraulic control system of the garbage truck enables the supporting leg oil cylinder and the lifting oil cylinder to act according to a preset sequence, so that the tipping risk of the whole truck is reduced.
Description
Technical Field
The invention relates to the technical field of environmental sanitation equipment, in particular to a hydraulic control system, a hydraulic control method and a garbage truck.
Background
At present, the dustbin of unloading the garbage truck from loading lifts and the landing leg action is independent control usually, when carrying out rubbish and topples over, generally controls the landing leg action earlier, supports the back that targets in place when the landing leg, controls the dustbin again and lifts and carry out rubbish and topple over the operation, because all be artifical manual operation, consequently often appear the landing leg not support and target in place, just begin to lift the condition of case operation and take place to lead to the risk that whole car tumbled.
Therefore, how to provide a hydraulic control system to enable the leg cylinder and the lift cylinder to act according to a preset sequence so as to reduce the tilting risk of the whole vehicle is a technical problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of this, the present invention provides a hydraulic control system, which enables a leg cylinder and a lift cylinder to act according to a preset sequence, so as to reduce the risk of tipping the entire vehicle.
Another object of the present invention is to provide a hydraulic control method.
The invention also aims to provide a garbage truck.
In order to achieve the purpose, the invention provides the following technical scheme:
a hydraulic control system is used for a garbage truck and comprises a supporting leg oil cylinder, a lifting oil cylinder, a control valve group and a controller, wherein the control valve group is electrically connected with the controller;
the controller can acquire the telescopic position information of the supporting leg oil cylinder, and when the supporting leg oil cylinder extends to a supporting position, the controller controls the control valve group to act so that the lifting oil cylinder extends to perform garbage dumping operation;
the controller can acquire the telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to the initial position, the controller controls the control valve group to act so that the supporting leg oil cylinder is reset to realize garbage dumping and complete reset operation.
Preferably, the control valve group comprises a three-position four-way electromagnetic reversing valve, a first hydraulic control one-way valve, a second hydraulic control one-way valve and a third hydraulic control one-way valve;
an A port of the three-position four-way electromagnetic reversing valve is communicated with an oil inlet of the first hydraulic control one-way valve, a P port of the three-position four-way electromagnetic reversing valve is communicated with a pressure oil source, an oil outlet of the first hydraulic control one-way valve is communicated with a rodless cavity of the supporting leg oil cylinder, an oil inlet of the second hydraulic control one-way valve is communicated with a rodless cavity of the lifting oil cylinder, an oil outlet of the second hydraulic control one-way valve is communicated with a rod cavity of the supporting leg oil cylinder, a control port of the second hydraulic control one-way valve is communicated with an oil outlet of the first hydraulic control one-way valve, a rod cavity of the lifting oil cylinder and a control port of the first hydraulic control one-way valve are both communicated with a B port of the three-position four-way electromagnetic reversing valve, a T port of the three-position four-way electromagnetic reversing valve is communicated with an oil tank, and an oil inlet of the third hydraulic control one-way valve is communicated with a rod cavity of the supporting leg oil cylinder, and the oil outlet and the control port of the third hydraulic control valve are communicated with the rod cavity of the lifting oil cylinder.
Preferably, the supporting position is the end position of the supporting leg oil cylinder.
Preferably, the initial position is a head end position of the lift cylinder.
Preferably, the landing leg hydro-cylinder includes K mouth and L mouth, the K mouth with the L mouth is all arranged in the end of landing leg hydro-cylinder, the K mouth passes through the third hydraulically controlled check valve with the pole chamber of lifting cylinder is linked together, the L mouth passes through the second hydraulically controlled check valve with the rodless chamber of lifting cylinder is linked together.
Preferably, the lifting oil cylinder comprises an M port and an N port, the M port and the N port are arranged at the head end of the lifting oil cylinder, the M port is communicated with a control port of the third hydraulic control check valve, and the N port is communicated with the rodless cavity of the support oil cylinder through the second hydraulic control check valve.
A hydraulic control method applied to the hydraulic control system according to any one of the above claims, comprising a refuse dump operation control method and a refuse dump completion return operation control method, wherein,
the garbage dumping operation control method comprises the following steps: the method comprises the steps that telescopic position information of a supporting leg oil cylinder is obtained, and when the supporting leg oil cylinder extends to a supporting position, a control valve group is controlled to act to enable a lifting oil cylinder to extend out to perform garbage dumping operation;
the control method for the reset operation after garbage dumping is as follows: and acquiring telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to an initial position, controlling the control valve group to act so as to reset the supporting leg oil cylinder to realize garbage dumping and finish resetting operation.
A refuse vehicle comprising a hydraulic control system as claimed in any one of the preceding claims.
According to the technical scheme, when garbage dumping operation is carried out, the starting button is started, the control valve group controls the supporting leg oil cylinder to extend out, the controller acquires the telescopic position information of the supporting leg oil cylinder, and when the supporting leg oil cylinder extends out to the supporting position, the controller controls the lifting oil cylinder to extend out to carry out garbage dumping operation; when garbage dumping is carried out and reset operation is finished, a reset button is started, the control valve group controls the lifting oil cylinder to reset, the controller acquires telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder resets to an initial position, the controller controls the supporting leg oil cylinder to reset so as to realize that garbage dumping is finished and reset operation is finished. Compared with the prior art, the hydraulic control system of the garbage truck enables the supporting leg oil cylinder and the lifting oil cylinder to act according to the preset sequence, so that the tilting risk of the whole garbage truck is reduced
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an initial state of a support oil cylinder and a lift oil cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the support leg cylinder extended to a supporting position and the lift cylinder in a second initial position according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the support leg cylinder extending to the supporting position and the lift cylinder extending to the lifting position according to the embodiment of the present invention.
Wherein, each part name is as follows:
100 is a supporting leg oil cylinder, 200 is a lifting oil cylinder, 300 is a three-position four-way electromagnetic directional valve, 400 is a first hydraulic control one-way valve, 500 is a second hydraulic control one-way valve, and 600 is a third hydraulic control valve.
Detailed Description
In view of the above, the core of the present invention is to provide a hydraulic control system, so that a support oil cylinder and a lift oil cylinder on a garbage truck can act according to a preset sequence, thereby reducing the risk of tipping the entire truck.
The invention also provides a hydraulic control method.
The other core of the invention is to provide a garbage truck.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, a hydraulic control system disclosed in the embodiment of the present invention is used for a garbage truck, and includes a support oil cylinder 100, a lift oil cylinder 200, a control valve set and a controller, wherein the control valve set is electrically connected to the controller; the controller can acquire the telescopic position information of the supporting leg oil cylinder, and when the supporting leg oil cylinder extends to the supporting position, the controller controls the control valve group to act so that the lifting oil cylinder extends to perform garbage dumping operation; the controller can acquire the telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to the initial position, the controller controls the control valve group to act so that the supporting leg oil cylinder is reset to achieve the purpose that garbage dumping is completed and reset operation is completed.
When garbage dumping operation is carried out, a start button is started, the control valve group controls the support leg oil cylinder 100 to extend out, the controller acquires the telescopic position information of the support leg oil cylinder 200, and when the support leg oil cylinder 200 extends out to a support position, the controller controls the lifting oil cylinder 200 to extend out to carry out garbage dumping operation; when the garbage dumping operation is completed, the reset button is started, the control valve group controls the lifting oil cylinder 200 to reset, the controller acquires the telescopic position information of the lifting oil cylinder 200, and when the lifting oil cylinder 200 is reset to the initial position, the controller controls the supporting leg oil cylinder 100 to reset so as to complete the reset operation of the garbage dumping operation.
Compared with the prior art, the hydraulic control system of the garbage truck enables the supporting leg oil cylinder 100 and the lifting oil cylinder 200 to act according to a preset sequence, so that the tipping risk of the whole garbage truck is reduced.
The embodiment of the present invention does not limit the specific structure of the control valve set, and the structure satisfying the use requirement of the present invention is within the protection scope of the present invention.
In order to optimize the above embodiments, the control valve set disclosed in the embodiments of the present invention includes a three-position four-way electromagnetic directional valve 300, a first pilot-operated check valve 400, a second pilot-operated check valve 500, and a third pilot-operated check valve 600, wherein an a port of the three-position four-way electromagnetic directional valve 300 is communicated with an oil inlet of the first pilot-operated check valve 400, a P port of the three-position four-way electromagnetic directional valve 300 is communicated with a pressure oil source, an oil outlet of the first pilot-operated check valve 400 is communicated with a rodless cavity of the leg cylinder 100, an oil inlet of the second pilot-operated check valve 500 is communicated with a rodless cavity of the lift cylinder 200, an oil outlet of the second pilot-operated check valve 500 is communicated with a rod cavity of the leg cylinder 100, a control port of the second pilot-operated check valve 500 is communicated with an oil outlet of the first pilot-operated check valve 400, both the rod cavity of the lift cylinder 200 and a control port of the first pilot-operated check valve 400 are communicated with a B port of the three-position four-way electromagnetic directional valve 300, the T port of the three-position four-way electromagnetic directional valve 300 is communicated with an oil tank, the oil inlet of the third hydraulic control one-way valve 600 is communicated with the rod cavity of the supporting leg oil cylinder 100, and the oil outlet and the control port of the third hydraulic control one-way valve 600 are both communicated with the rod cavity of the lifting oil cylinder 200.
When garbage is dumped, the start button is started, the three-position four-way electromagnetic directional valve 300 is electrified at the left position, the three-position four-way electromagnetic directional valve 300 is switched to the left position, the port A and the port P of the three-position four-way electromagnetic directional valve 300 are communicated, the port B and the port T are communicated, pressure oil enters the rodless cavity of the supporting leg oil cylinder 100 through the first hydraulic control one-way valve 400 and pushes the supporting leg oil cylinder 100 to extend to the supporting position, and the pressure oil in the rod cavity of the supporting leg oil cylinder 100 flows back to an oil tank through the communication of the third hydraulic control one-way valve 600, the rod cavity of the lifting oil cylinder 200, the port B and the port T of the three-position four-way electromagnetic directional valve 300;
when the supporting leg oil cylinder 100 extends to a supporting position, the controller controls the three-position four-way electromagnetic directional valve 300 to be switched to a middle position, at the moment, an opening A and an opening T of the three-position four-way electromagnetic directional valve 300 are communicated, an opening B and the opening T are communicated, the second hydraulic control one-way valve 500 is in an opening state under the action of pressure oil of the supporting leg oil cylinder 100, the pressure oil reversely flows into a rodless cavity of the supporting leg oil cylinder 100 through the first hydraulic control one-way valve 400, enters a rodless cavity of the lifting oil cylinder 200 through the second hydraulic control one-way valve 500, and pushes the lifting oil cylinder 200 to extend out to dump garbage;
when the garbage dumping is finished and the reset operation is carried out, a reset button is started, the right position of the three-position four-way electromagnetic directional valve 300 is electrified, the port B and the port P of the three-position four-way electromagnetic directional valve 300 are communicated, the port A and the port T are communicated, pressure oil enters a rod cavity of the lifting oil cylinder 200 through the three-position four-way electromagnetic directional valve 300 and pushes the lifting oil cylinder 200 to reset to an initial position, and at the moment, the pressure oil in the rodless cavity of the lifting oil cylinder 200 flows back to an oil tank through the second hydraulic control one-way valve 200, the rodless cavity of the supporting leg oil cylinder 100, the first hydraulic control one-way valve 400 and the three-position four-way electromagnetic directional valve 300, so that the resetting of the lifting oil cylinder 200 is finished;
when the lifting oil cylinder 200 is reset to the initial position, the controller controls the three-position four-way electromagnetic directional valve 300 to be switched to the middle position, pressure oil in the lifting oil cylinder 200 enters a control port of the third hydraulic control one-way valve 600, so that the third hydraulic control one-way valve 600 is in an open state, the control port of the second hydraulic control one-way valve 500 is communicated with an oil tank at the moment, the second hydraulic control one-way valve 500 is in a close state, the pressure oil enters a rod cavity of the supporting leg oil cylinder 100 through the third hydraulic control one-way valve 600, and the supporting leg oil cylinder 100 is pushed to reset to realize garbage dumping and complete reset operation.
It should be noted that the leg cylinder 100 is connected to a leg on the garbage truck, and when the leg cylinder 300 extends to a supporting position, the leg can be supported; the lifting cylinder 200 is connected to a garbage can on the garbage, and when the lifting cylinder 500 is extended to a supporting position, the garbage can be dumped.
The landing leg oil cylinder 100 comprises a landing leg oil cylinder body, and a first piston rod which are arranged in the landing leg oil cylinder body, wherein the first piston is connected with the first piston rod, and the first piston rod can move in the landing leg oil cylinder body.
The lifting oil cylinder 200 comprises a lifting oil cylinder body, and a second piston rod which are arranged in the lifting oil cylinder body, wherein the second piston is connected with the second piston rod, and the second piston rod can move in the lifting oil cylinder body;
the supporting position is the tail end position of the supporting leg oil cylinder, and the initial position is the head end position of the lifting oil cylinder.
It should be explained that the end position of the leg cylinder 100 is a position where the first piston rod of the leg cylinder 100 completely extends out of the leg cylinder body, and the head position of the lift cylinder 200 is a position where the second piston rod of the lift cylinder 200 completely retracts into the lift cylinder body.
It should be noted that the support leg cylinder 100 includes a K port and an L port, the K port and the L port are both disposed at the end of the support leg cylinder 100, the K port is communicated with the rod cavity of the lift cylinder 200 through the third hydraulic control check valve 600, and the L port is communicated with the rodless cavity of the lift cylinder 200 through the second hydraulic control check valve 500.
When the supporting leg oil cylinder 100 reaches the supporting position, the first piston separates an L port and a K port of the supporting leg oil cylinder 100, the L port is arranged in a rod cavity of the supporting leg oil cylinder 100 at the moment, and the K port is arranged in a rodless cavity of the supporting leg oil cylinder 100.
It should be noted that the lift cylinder 200 includes an M port and an N port, the M port and the N port are disposed at the head end of the lift cylinder 200, the M port is communicated with the control port of the third pilot-controlled check valve 600, and the N port is communicated with the rodless cavity of the leg cylinder 100 through the second pilot-controlled check valve 500.
When the lifting oil cylinder 200 reaches the initial position, the second piston separates the M port and the N port of the lifting oil cylinder 200, at this time, the M port is arranged in the rod cavity of the lifting oil cylinder 200, and the N port is arranged in the rodless cavity of the lifting oil cylinder 200.
The embodiment of the invention also discloses a hydraulic control method which is applied to the hydraulic control system disclosed by any one of the above embodiments and comprises a garbage dumping operation control method and a garbage dumping completion reset operation control method, wherein,
the garbage dumping operation control method comprises the following steps: acquiring telescopic position information of the support leg oil cylinder 100, and controlling the action of the control valve group to enable the lifting oil cylinder 200 to extend out to perform garbage dumping operation when the support leg oil cylinder 100 extends out to a supporting position; the garbage dumping completion reset operation control method comprises the following steps: and acquiring the telescopic position information of the lifting oil cylinder 200, and controlling the control valve group to act to reset the support oil cylinder 100 when the lifting oil cylinder 200 is reset to the initial position so as to realize garbage dumping and finish resetting operation.
When garbage dumping operation is carried out, a start button is started, a control valve group controls the support leg oil cylinder 100 to extend out, a controller acquires the telescopic position information of the support leg oil cylinder 00, and when the support leg oil cylinder 00 extends out to a support position, the controller controls the lifting oil cylinder 200 to extend out to carry out garbage dumping operation; when the garbage dumping operation is completed, the reset button is started, the control valve group controls the lifting oil cylinder 200 to reset, the controller acquires the telescopic position information of the lifting oil cylinder 200, and when the lifting oil cylinder 200 is reset to the initial position, the controller controls the supporting leg oil cylinder 100 to reset so as to complete the reset operation of the garbage dumping operation. Compared with the prior art, the hydraulic control system of the garbage truck enables the support oil cylinder 100 and the lifting oil cylinder 200 to act according to a preset sequence, so that the tipping risk of the whole truck is reduced.
The embodiment of the invention also discloses a garbage truck which comprises the hydraulic control system disclosed by any one of the above embodiments.
Because the garbage truck adopts the hydraulic control system disclosed by the embodiment, the garbage truck has the technical advantages of the hydraulic control system, and the embodiment of the invention does not need to be repeated.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A hydraulic control system is used for a garbage truck and is characterized by comprising a supporting leg oil cylinder, a lifting oil cylinder, a control valve group and a controller, wherein the control valve group is electrically connected with the controller;
the controller can acquire the telescopic position information of the supporting leg oil cylinder, and when the supporting leg oil cylinder extends to a supporting position, the controller controls the control valve group to act so that the lifting oil cylinder extends to perform garbage dumping operation;
the controller can acquire the telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to the initial position, the controller controls the control valve group to act so that the supporting leg oil cylinder is reset to realize garbage dumping and complete reset operation.
2. The hydraulic control system of claim 1, wherein the set of pilot valves includes a three-position, four-way solenoid directional valve, a first pilot operated check valve, a second pilot operated check valve, and a third pilot operated check valve;
an A port of the three-position four-way electromagnetic reversing valve is communicated with an oil inlet of the first hydraulic control one-way valve, a P port of the three-position four-way electromagnetic reversing valve is communicated with a pressure oil source, an oil outlet of the first hydraulic control one-way valve is communicated with a rodless cavity of the supporting leg oil cylinder, an oil inlet of the second hydraulic control one-way valve is communicated with a rodless cavity of the lifting oil cylinder, an oil outlet of the second hydraulic control one-way valve is communicated with a rod cavity of the supporting leg oil cylinder, a control port of the second hydraulic control one-way valve is communicated with an oil outlet of the first hydraulic control one-way valve, a rod cavity of the lifting oil cylinder and a control port of the first hydraulic control one-way valve are both communicated with a B port of the three-position four-way electromagnetic reversing valve, a T port of the three-position four-way electromagnetic reversing valve is communicated with an oil tank, and an oil inlet of the third hydraulic control one-way valve is communicated with a rod cavity of the supporting leg oil cylinder, and the oil outlet and the control port of the third hydraulic control valve are communicated with the rod cavity of the lifting oil cylinder.
3. The automated control system of claim 1, wherein the support position is a terminal position of the leg cylinder.
4. The automatic control system of claim 1, wherein the initial position is a head end position of the lift cylinder.
5. The automatic control system of claim 1, wherein the support oil cylinder comprises a K port and an L port, the K port and the L port are both disposed at a tail end of the support oil cylinder, the K port is communicated with a rod cavity of the lifting oil cylinder through the third hydraulic control check valve, and the L port is communicated with a rodless cavity of the lifting oil cylinder through the second hydraulic control check valve.
6. The automatic control system of claim 1, wherein the lift cylinder comprises an M port and an N port, the M port and the N port are disposed at a head end of the lift cylinder, the M port is in communication with a control port of the third pilot-controlled check valve, and the N port is in communication with the rodless cavity of the leg cylinder through the second pilot-controlled check valve.
7. A hydraulic control method applied to the hydraulic control system according to any one of claims 1 to 6, comprising a refuse dump operation control method and a refuse dump completion return operation control method, wherein,
the garbage dumping operation control method comprises the following steps: acquiring telescopic position information of a supporting leg oil cylinder, and controlling the control valve group to act to enable the lifting oil cylinder to extend out to perform garbage dumping operation when the supporting leg oil cylinder extends out to a supporting position;
the control method for the reset operation after garbage dumping is as follows: and acquiring telescopic position information of the lifting oil cylinder, and when the lifting oil cylinder is reset to an initial position, controlling the control valve group to act so as to reset the supporting leg oil cylinder to realize garbage dumping and finish resetting operation.
8. A refuse vehicle, characterized in that it comprises a hydraulic control system according to any one of claims 1-6.
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| CN202210489193.6A CN114718936A (en) | 2022-04-26 | 2022-04-26 | Hydraulic control system, control method and garbage truck |
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| CN202210489193.6A CN114718936A (en) | 2022-04-26 | 2022-04-26 | Hydraulic control system, control method and garbage truck |
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| CN103008362A (en) * | 2012-11-27 | 2013-04-03 | 中色科技股份有限公司 | Hydraulic press-down parallel servo control method and loop for plate and strip rolling mill |
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