CN111350228A - Excavator hydraulic control circuit and control method - Google Patents
Excavator hydraulic control circuit and control method Download PDFInfo
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- CN111350228A CN111350228A CN202010272428.7A CN202010272428A CN111350228A CN 111350228 A CN111350228 A CN 111350228A CN 202010272428 A CN202010272428 A CN 202010272428A CN 111350228 A CN111350228 A CN 111350228A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2025—Particular purposes of control systems not otherwise provided for
- E02F9/205—Remotely operated machines, e.g. unmanned vehicles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a hydraulic control loop and a control method of an excavator, which relate to the technical field of excavators and comprise a manual control valve bank, a remote control valve bank, a shuttle valve assembly, a remote control assembly, a pilot pump and an execution oil cylinder assembly; when a driver opens the manual control valve group by operating a hand lever, pilot oil pumped by the pilot pump sequentially passes through the manual control valve group and the shuttle valve assembly to enter the execution oil cylinder assembly; when a driver opens the remote control valve group through the remote control assembly, pilot oil can enter the execution oil cylinder assembly through the remote control valve group and the shuttle valve assembly in sequence; the remote control valve group and the shuttle valve assembly are additionally arranged on the original excavator loop, so that the whole structure is simple and the realization is convenient. By utilizing the characteristics of the shuttle valve, the control of the operating handle and the remote control can be switched at will without adding an additional complex electric control system, the structure is simple, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of excavators, in particular to a hydraulic control circuit and a control method of an excavator.
Background
With the promotion of domestic and foreign capital construction work, the application of the excavator is more and more extensive. In a general excavation working condition, a driver operates an operating handle to control the action of the bucket; however, remote control of the excavator is required in some dangerous or inconvenient excavation conditions controlled by the operating handle.
The existing remote control excavator is characterized in that a plurality of electromagnetic valves of different types are additionally arranged among an operating handle, a pedal and an execution oil cylinder, and an electric control system is additionally arranged, so that the pilot oil path and the execution oil cylinder can be controlled by the operating handle and can be remotely controlled, but the structure and the control mode of the modified oil path are too complex and are inconvenient to realize.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a hydraulic control circuit and a control method of an excavator, which aim to solve the technical problem that the existing excavator with a remote control function is inconvenient to realize due to too complicated control oil way.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the invention provides an excavator hydraulic control loop which comprises a manual control valve group, a remote control valve group, a shuttle valve assembly, a remote control assembly, a pilot pump and an execution oil cylinder assembly, wherein the manual control valve group is connected with the remote control valve group;
the pilot pump is respectively communicated with an oil inlet of the manual control valve group and an oil inlet of the remote control valve group, a first oil inlet of the shuttle valve assembly is communicated with an oil outlet of the manual control valve group, a second oil inlet of the shuttle valve assembly is communicated with an oil outlet of the remote control valve group, and an oil outlet of the shuttle valve assembly is communicated with the execution oil cylinder assembly;
the remote control assembly is in signal connection with the remote control valve group and is used for controlling the opening and closing of the remote control valve group.
Further, the remote control valve group comprises a first electric control valve and a second electric control valve;
an oil inlet of the first electric control valve and an oil inlet of the second electric control valve are both communicated with the pilot pump, and an oil outlet of the first electric control valve and an oil outlet of the second electric control valve are both communicated with a second oil inlet of the shuttle valve assembly;
and the first electric control valve and the second electric control valve are in signal connection with the remote control assembly.
Further, the shuttle valve assembly includes a first shuttle valve and a second shuttle valve;
the first oil inlet of the first shuttle valve and the first oil inlet of the second shuttle valve are communicated with the oil outlet of the manual control valve group, the second oil inlet of the first shuttle valve is communicated with the oil outlet of the first electric control valve, the second oil inlet of the second shuttle valve is communicated with the oil outlet of the second electric control valve, and the oil outlet of the first shuttle valve and the oil outlet of the second shuttle valve are communicated with the execution oil cylinder assembly.
Further, the manual control valve group comprises a first manual valve and a second manual valve;
the oil inlet of the first manual control valve and the oil inlet of the second manual control valve are communicated with the pilot pump, the oil outlet of the first manual control valve is communicated with the first oil inlet of the first shuttle valve, and the oil outlet of the second manual control valve is communicated with the first oil inlet of the second shuttle valve.
Furthermore, an oil return port of the first manual control valve is communicated with an oil return port of the second manual control valve through a connecting pipe, and the connecting pipe is communicated with an oil return tank.
Furthermore, the execution oil cylinder assembly comprises a booster pump, a hydraulic reversing valve and an oil cylinder body;
a first pilot oil port of the hydraulic reversing valve is communicated with an oil outlet of the first shuttle valve, and a second pilot oil port of the hydraulic reversing valve is communicated with an oil outlet of the second shuttle valve;
and the booster pump is communicated with the oil cylinder body through the hydraulic reversing valve.
Further, the hydraulic reversing valve is a three-position four-way reversing valve;
an oil inlet of the three-position four-way reversing valve is communicated with the booster pump, a first oil outlet of the three-position four-way reversing valve is communicated with a first oil port of the oil cylinder body, and a second oil outlet of the three-position four-way reversing valve is communicated with a second oil port of the oil cylinder body.
The invention provides a control method based on an excavator hydraulic control loop, which comprises the following steps: operating a hand lever for control and remote control;
the operating handle control is used for enabling the pilot pump to be communicated with the execution oil cylinder assembly sequentially through the manual control valve group and the shuttle valve assembly;
the remote control is used for enabling the pilot pump to be communicated with the execution oil cylinder assembly sequentially through the remote control valve group and the shuttle valve assembly.
Further, the lever control comprises:
the first manual control valve is opened through the operating handle rod, so that the pilot oil pumped out by the pilot pump flows into a first pilot oil port of the three-dimensional four-way reversing valve through the first manual control valve, a first oil inlet of the first shuttle valve and an oil outlet of the first shuttle valve in sequence;
and the second manual control valve is opened by operating the hand lever, so that the pilot oil pumped by the pilot pump flows into the second pilot oil port of the three-dimensional four-way reversing valve through the second manual control valve, the first oil inlet of the second shuttle valve and the oil outlet of the second shuttle valve in sequence.
Further, the remote control includes:
the first electric control valve is opened through the remote control assembly, so that the pilot oil pumped out by the pilot pump flows into a first pilot oil port of the three-dimensional four-way reversing valve through the first electric control valve, a second oil inlet of the first shuttle valve and an oil outlet of the first shuttle valve in sequence;
and the second electric control valve is opened through the remote control assembly, so that the pilot oil pumped out by the pilot pump flows into the second pilot oil port of the three-dimensional four-way reversing valve through the second electric control valve, the second oil inlet of the second shuttle valve and the oil outlet of the second shuttle valve in sequence.
By combining the technical scheme, the invention has the beneficial effects that:
the invention provides an excavator hydraulic control loop which comprises a manual control valve group, a remote control valve group, a shuttle valve assembly, a remote control assembly, a pilot pump and an execution oil cylinder assembly, wherein the manual control valve group is connected with the remote control valve group; the pilot pump is respectively communicated with an oil inlet of the manual control valve group and an oil inlet of the remote control valve group, a first oil inlet of the shuttle valve assembly is communicated with an oil outlet of the manual control valve group, a second oil inlet of the shuttle valve assembly is communicated with an oil outlet of the remote control valve group, and an oil outlet of the shuttle valve assembly is communicated with the execution oil cylinder assembly; the remote control assembly is in signal connection with the remote control valve bank and is used for controlling the opening and closing of the remote control valve bank.
The pilot oil pumped by the pilot pump enters the execution oil cylinder assembly through the manual control valve bank and the shuttle valve assembly when a driver opens the manual control valve bank through an operation hand lever; the pilot oil can enter the execution oil cylinder assembly through the remote control valve group and the shuttle valve assembly in sequence when a driver opens the remote control valve group through the remote control assembly; the remote control valve group and the shuttle valve assembly are additionally arranged on the original excavator loop, so that the whole structure is simple and the realization is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a hydraulic schematic diagram of an excavator hydraulic control circuit according to an embodiment of the present invention.
Icon: 100-manual control valve group; 110-a first manually controlled valve; 120-a second manual valve; 200-remote control valve group; 210-a first electrically controlled valve; 220-a second electrically controlled valve; 300-a shuttle valve assembly; 310-a first shuttle valve; 320-a second shuttle valve; 400-a remote control assembly; 500-a pilot pump; 600-executing the oil cylinder assembly; 610-cylinder body; 620-a hydraulically operated directional valve; 621-a first pilot oil port; 622-second pilot oil port; 630-booster pump.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, the present embodiment provides an excavator hydraulic control circuit, including a manual control valve assembly 100, a remote control valve assembly 200, a shuttle valve assembly 300, a remote control assembly 400, a pilot pump 500 and an actuating cylinder assembly 600; the pilot pump 500 is respectively communicated with an oil inlet of the manual control valve group 100 and an oil inlet of the remote control valve group 200, a first oil inlet of the shuttle valve assembly 300 is communicated with an oil outlet of the manual control valve group 100, a second oil inlet of the shuttle valve assembly 300 is communicated with an oil outlet of the remote control valve group 200, and an oil outlet of the shuttle valve assembly 300 is communicated with the execution oil cylinder assembly 600; the remote control assembly 400 is in signal connection with the remote control valve bank 200, and the remote control assembly 400 is used for controlling the opening and closing of the remote control valve bank 200.
Specifically, the manual control valve may be configured as various types of valves for manual opening and closing, the pilot pump 500 is configured as various types of hydraulic pumps, and the pilot pump 500 is configured to pump pilot oil into the pilot circuit; the remote control valve set 200 is a valve controlled to be opened and closed by an electric signal, the remote control valve set 200 is a wired remote control handle or a wireless transmission remote controller, and the remote control assembly 400 is used for inputting a remote control signal to the remote control valve set 200 so as to remotely control the opening and closing of the remote control valve set 200. The shuttle valve assembly 300 is characterized in that one of the first oil inlet and the second oil inlet is communicated with the oil outlet, when a driver controls the manual control valve group 100 to be opened through an operating handle, pilot oil pumped by the pilot pump 500 flows into the execution oil cylinder assembly 600 through the manual control valve group 100, the first oil inlet of the shuttle valve assembly 300 and the oil outlet of the shuttle valve assembly 300 in sequence; when the driver controls the remote valve set 200 to open through the remote control assembly 400, the pilot oil pumped by the pilot pump 500 flows into the execution oil cylinder assembly 600 through the remote valve set 200, the second oil inlet of the shuttle valve assembly 300 and the oil outlet of the shuttle valve assembly 300 in sequence.
In the hydraulic control circuit of the excavator provided by the embodiment, because the pilot pump 500 is communicated with the oil inlet of the manual control valve group 100, the oil outlet of the manual control valve group 100 is communicated with the first oil inlet of the shuttle valve assembly 300, and the oil outlet of the shuttle valve assembly 300 is communicated with the execution oil cylinder assembly 600, when a driver opens the manual control valve group 100 by operating a hand lever, the pilot oil pumped by the pilot pump 500 can enter the execution oil cylinder assembly 600 through the manual control valve group 100 and the shuttle valve assembly 300 in sequence; because the pilot pump 500 is communicated with the oil inlet of the remote control valve group 200, the oil outlet of the remote control valve group 200 is communicated with the second oil inlet of the shuttle valve assembly 300, and the oil outlet of the shuttle valve assembly 300 is communicated with the execution oil cylinder assembly 600, when a driver opens the remote control valve group 200 through the remote control assembly 400, pilot oil can enter the execution oil cylinder assembly 600 through the remote control valve group 200 and the shuttle valve assembly 300 in sequence; the control mode of operating the hand lever and the control mode of the remote control assembly 400 are realized, only the remote control valve group 200 and the shuttle valve assembly 300 are needed to be additionally arranged in the original excavator loop, the whole structure is simple, and the realization is convenient.
Further, the remote valve set 200 in the hydraulic control circuit of the excavator comprises a first electric control valve 210 and a second electric control valve 220; an oil inlet of the first electronic control valve 210 and an oil inlet of the second electronic control valve 220 are both communicated with the pilot pump 500, and an oil outlet of the first electronic control valve 210 and an oil outlet of the second electronic control valve 220 are both communicated with a second oil inlet of the shuttle valve assembly 300; the first and second electronically controlled valves 210 and 220 are each signally connected to a remote control assembly 400.
Specifically, the first electronic control valve 210 and the second electronic control valve 220 have the same structure, and both the first electronic control valve 210 and the second electronic control valve 220 are designed as electromagnetic proportional relief valves or electromagnetic switch valves; the remote control assembly 400 is preferably a wireless remote controller, the first electric control valve 210 and the second electric control valve 220 are both wirelessly connected to the wireless remote controller, and the wireless remote controller is provided with a first control button for controlling the first electric control valve 210 to open and close and a second control button for controlling the second electric control valve 220 to open and close. An oil inlet of the first electronic control valve 210 and an oil inlet of the second electronic control valve 220 are both communicated with an oil outlet of the pilot pump 500 through a communicating pipe, and an oil outlet of the first electronic control valve 210 and an oil outlet of the second electronic control valve 220 are both communicated with a second oil inlet of the shuttle valve assembly 300 through a communicating pipe. When the wireless remote controller controls the first electronic control valve 210 to be opened, the pilot oil pumped by the pilot pump 500 sequentially flows into the execution oil cylinder assembly 600 through the first electronic control valve 210, the second oil inlet of the shuttle valve assembly 300 and the oil outlet of the shuttle valve assembly 300; when the wireless remote controller controls the second electronic control valve 220 to be opened, the pilot oil pumped by the pilot pump 500 sequentially flows into the execution oil cylinder assembly 600 through the second electronic control valve 220, the second oil inlet of the shuttle valve assembly 300 and the oil outlet of the shuttle valve assembly 300.
Further, the shuttle valve assembly 300 includes a first shuttle valve 310 and a second shuttle valve 320; a first oil inlet of the first shuttle valve 310 and a first oil inlet of the second shuttle valve 320 are both communicated with an oil outlet of the manual control valve group 100, a second oil inlet of the first shuttle valve 310 is communicated with an oil outlet of the first electronic control valve 210, a second oil inlet of the second shuttle valve 320 is communicated with an oil outlet of the second electronic control valve 220, and an oil outlet of the first shuttle valve 310 and an oil outlet of the second shuttle valve 320 are both communicated with the execution oil cylinder assembly 600.
Specifically, as shown in fig. 1, a first oil inlet of the first shuttle valve 310 is set to be a port P1, a second oil inlet of the first shuttle valve 310 is set to be a port P2, and an oil outlet of the first shuttle valve 310 is set to be a port a 1; the first oil inlet of the second shuttle valve 320 is set as a port P3, the second oil inlet of the second shuttle valve 320 is set as a port P4, and the oil outlet of the second shuttle valve 320 is set as a port A2. The oil outlet of the first electric control valve 210 is communicated with the port P2 through a communicating pipe, and the oil outlet of the second electric control valve 220 is communicated with the port P4 through a communicating pipe.
Further, the manual control valve set 100 includes a first manual valve 110 and a second manual valve 120; an oil inlet of the first manual valve 110 and an oil inlet of the second manual valve 120 are both communicated with the pilot pump 500, an oil outlet of the first manual valve 110 is communicated with a first oil inlet of the first shuttle valve 310, and an oil outlet of the second manual valve 120 is communicated with a first oil inlet of the second shuttle valve 320.
Specifically, the oil inlet of the first manual valve 110 and the oil inlet of the second manual valve 120 are both communicated with the pilot pump 500 through a communication pipe, the oil outlet of the first manual valve 110 is communicated with the port P1 through a communication pipe, and the oil outlet of the second manual valve 120 is communicated with the port P3 through a communication pipe.
Further, an oil return port of the first manual valve 110 is communicated with an oil return port of the second manual valve 120 through a connecting pipe, and the connecting pipe is communicated with an oil return tank.
Specifically, the first manual control valve 110 and the second manual control valve 120 form a pair of manual switch valves, and the oil return port of the first manual control valve 110 and the oil return port of the second manual control valve 120 are both communicated with the oil return tank through a connecting pipe, so that the first manual control valve 110 and the second manual control valve 120 are compact in overall structure, small in occupied space and convenient to arrange.
Further, the execution oil cylinder assembly 600 comprises a booster pump 630, a hydraulic reversing valve 620 and an oil cylinder body 610; a first pilot oil port 621 of the hydraulic reversing valve 620 is communicated with an oil outlet of the first shuttle valve 310, and a second pilot oil port 622 of the hydraulic reversing valve 620 is communicated with an oil outlet of the second shuttle valve 320; the booster pump 630 is communicated with the cylinder body 610 through a hydraulically operated directional valve 620.
Specifically, the port a1 is communicated with the first pilot oil port 621, and the port a2 is communicated with the second pilot oil port 622; the hydraulic reversing valve 620 is used for changing the flow direction of the oil output by the booster pump 630, so that the hydraulic oil pumped by the booster pump 630 can push the piston rod of the cylinder body 610 to extend or retract.
Further, the hydraulic directional control valve 620 is a three-position four-way directional control valve; an oil inlet of the three-position four-way reversing valve is communicated with the booster pump 630, a first oil outlet of the three-position four-way reversing valve is communicated with a first oil port of the oil cylinder body 610, and a second oil outlet of the three-position four-way reversing valve is communicated with a second oil port of the oil cylinder body 610.
Specifically, the hydraulic directional control valve 620 is a three-position four-way pilot hydraulic directional control valve, and when pilot oil output from the port a1 enters the directional control valve through the first pilot oil port 621, the pilot oil pushes the spool of the directional control valve to move to the right, so that the booster pump 630 is communicated with the oil cylinder body 610 through the right communication position of the three-position four-way directional control valve, and the piston rod of the oil cylinder body 610 is pushed to extend; when the pilot oil output from the port A2 enters the reversing valve through the second pilot oil port 622, the valve core of the reversing valve is pushed to move left, so that the booster pump 630 is communicated with the oil cylinder body 610 through the left communication position of the three-position four-way reversing valve, and the piston rod of the oil cylinder body 610 is pushed to retract; and an oil return port of the three-position four-way reversing valve is communicated with an oil return tank.
Example 2
The control method based on the excavator hydraulic control circuit provided by the embodiment comprises the following steps: operating a hand lever for control and remote control;
the operating handle control is used for enabling the pilot pump 500 to be communicated with the actuating cylinder assembly 600 through the manual control valve group 100 and the shuttle valve assembly 300 in sequence; the remote control is used to place the pilot pump 500 in communication with the actuation cylinder assembly 600, in turn, through the remote valve block 200 and the shuttle valve assembly 300.
Specifically, two operating levers are provided and are both located in the cab of the excavator, and the two operating levers are respectively used for controlling the opening and closing of the first manual control valve 110 and the second manual control valve 120; when the first manual valve 110 or the second manual valve 120 is opened by operating the lever, the hydraulic control circuit is in a close-range manual operation state; when the remote control assembly 400 controls the first electronic control valve 210 or the second electronic control valve 220 to be opened, the hydraulic control circuit is in a remote control state. Through setting up first shuttle valve 310 and second shuttle valve 320, utilize the characteristic of shuttle valve for can switch over at will between operating handle control and the remote control, need not extra increase complicated electrical system, simple structure, it is convenient to use.
Further, the operating handle control comprises:
the first manual valve 110 is opened by operating the hand lever, so that the pilot oil pumped by the pilot pump 500 sequentially flows into the first pilot oil port 621 of the three-dimensional four-way reversing valve through the first manual valve 110, the first oil inlet of the first shuttle valve 310 and the oil outlet of the first shuttle valve 310; the second manual valve 120 is opened by operating the hand lever, so that the pilot oil pumped by the pilot pump 500 flows into the second pilot oil port 622 of the three-dimensional four-way reversing valve through the second manual valve 120, the first oil inlet of the second shuttle valve 320 and the oil outlet of the second shuttle valve 320 in sequence.
Specifically, when the first manual valve 110 is opened by the operating handle, the pilot oil enters the first pilot oil port 621 through the first manual valve 110, the port P1 and the port a1 in sequence, the booster pump 630 is communicated with the oil cylinder body 610 through the right communication position of the three-position four-way reversing valve, and the piston rod of the oil cylinder body 610 is pushed to extend out; when the second manual valve 120 is opened by operating the hand lever, the pilot oil enters the second pilot oil port 622 sequentially through the second manual valve 120, the port P3 and the port a2, and the booster pump 630 is communicated with the cylinder body 610 through the left communication position of the three-position four-way reversing valve, thereby pushing the piston rod of the cylinder body 610 to retract.
Further, the remote control includes: the first electronic control valve 210 is opened through the remote control assembly 400, so that the pilot oil pumped by the pilot pump 500 sequentially flows into the first pilot oil port 621 of the three-dimensional four-way reversing valve through the first electronic control valve 210, the second oil inlet of the first shuttle valve 310 and the oil outlet of the first shuttle valve 310; the second electronic control valve 220 is opened by the remote control assembly 400, so that the pilot oil pumped by the pilot pump 500 sequentially flows into the second pilot oil port 622 of the three-dimensional four-way reversing valve through the second electronic control valve 220, the second oil inlet of the second shuttle valve 320 and the oil outlet of the second shuttle valve 320.
Specifically, when the first electric control valve 210 is opened through the wireless remote controller, the pilot oil sequentially passes through the first electric control valve 210, the port P2 and the port a1 to enter the first pilot oil port 621, the booster pump 630 is communicated with the oil cylinder body 610 through the right communication position of the three-position four-way reversing valve, and the piston rod of the oil cylinder body 610 is pushed to extend out; when the second electric control valve 220 is opened through the wireless remote controller, the pilot oil enters the second pilot oil port 622 through the second manual control valve 120, the port P4 and the port A2 in sequence, and the booster pump 630 is communicated with the oil cylinder body 610 through the left communication position of the three-position four-way reversing valve to push the piston rod of the oil cylinder body 610 to retract; wherein extension and retraction of the piston rod corresponds to different actions of the actuator (e.g., bucket).
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An excavator hydraulic control circuit, comprising: the remote control valve group comprises a manual control valve group (100), a remote control valve group (200), a shuttle valve assembly (300), a remote control assembly (400), a pilot pump (500) and an execution oil cylinder assembly (600);
the pilot pump (500) is respectively communicated with an oil inlet of the manual control valve group (100) and an oil inlet of the remote control valve group (200), a first oil inlet of the shuttle valve assembly (300) is communicated with an oil outlet of the manual control valve group (100), a second oil inlet of the shuttle valve assembly (300) is communicated with an oil outlet of the remote control valve group (200), and an oil outlet of the shuttle valve assembly (300) is communicated with the execution oil cylinder assembly (600);
the remote control assembly (400) is in signal connection with the remote control valve group (200), and the remote control assembly (400) is used for controlling the opening and closing of the remote control valve group (200).
2. The excavator hydraulic control circuit of claim 1, wherein the remote valve block (200) comprises a first electrically controlled valve (210) and a second electrically controlled valve (220);
the oil inlet of the first electronic control valve (210) and the oil inlet of the second electronic control valve (220) are both communicated with the pilot pump (500), and the oil outlet of the first electronic control valve (210) and the oil outlet of the second electronic control valve (220) are both communicated with the second oil inlet of the shuttle valve assembly (300);
the first electric control valve (210) and the second electric control valve (220) are in signal connection with the remote control assembly (400).
3. The excavator hydraulic control circuit of claim 2, wherein the shuttle valve assembly (300) comprises a first shuttle valve (310) and a second shuttle valve (320);
a first oil inlet of the first shuttle valve (310) and a first oil inlet of the second shuttle valve (320) are both communicated with an oil outlet of the manual control valve group (100), a second oil inlet of the first shuttle valve (310) is communicated with an oil outlet of the first electronic control valve (210), a second oil inlet of the second shuttle valve (320) is communicated with an oil outlet of the second electronic control valve (220), and an oil outlet of the first shuttle valve (310) and an oil outlet of the second shuttle valve (320) are both communicated with the execution oil cylinder assembly (600).
4. The excavator hydraulic control circuit of claim 3, wherein the manual control valve pack (100) comprises a first manual valve (110) and a second manual valve (120);
an oil inlet of the first manual control valve (110) and an oil inlet of the second manual control valve (120) are both communicated with the pilot pump (500), an oil outlet of the first manual control valve (110) is communicated with a first oil inlet of the first shuttle valve (310), and an oil outlet of the second manual control valve (120) is communicated with a first oil inlet of the second shuttle valve (320).
5. The hydraulic control circuit of the excavator according to claim 4, wherein the oil return port of the first manual valve (110) is communicated with the oil return port of the second manual valve (120) through a connecting pipe, and the connecting pipe is communicated with an oil return tank.
6. The excavator hydraulic control circuit of any one of claims 3 to 5, wherein the implement cylinder assembly (600) comprises a boost pump (630), a hydraulically operated directional control valve (620) and a cylinder body (610);
a first pilot oil port (621) of the hydraulic reversing valve (620) is communicated with an oil outlet of the first shuttle valve (310), and a second pilot oil port (622) of the hydraulic reversing valve (620) is communicated with an oil outlet of the second shuttle valve (320);
and the booster pump (630) is communicated with the oil cylinder body (610) through the hydraulic reversing valve (620).
7. The excavator hydraulic control circuit of claim 6, wherein the hydraulically operated directional control valve (620) is a three-position four-way directional control valve;
an oil inlet of the three-position four-way reversing valve is communicated with the booster pump (630), a first oil outlet of the three-position four-way reversing valve is communicated with a first oil port of the oil cylinder body (610), and a second oil outlet of the three-position four-way reversing valve is communicated with a second oil port of the oil cylinder body (610).
8. A control method based on an excavator hydraulic control circuit is characterized by comprising the following steps: operating a hand lever for control and remote control;
the operating handle control is used for enabling the pilot pump (500) to be communicated with the execution oil cylinder assembly (600) through the manual control valve group (100) and the shuttle valve assembly (300) in sequence;
the remote control is used for enabling the pilot pump (500) to be communicated with the execution oil cylinder assembly (600) sequentially through the remote control valve group (200) and the shuttle valve assembly (300).
9. The control method of claim 8, wherein the lever control comprises:
the first manual control valve (110) is opened by operating the hand lever, so that the pilot oil pumped by the pilot pump (500) flows into a first pilot oil port (621) of the three-dimensional four-way reversing valve through the first manual control valve (110), a first oil inlet of the first shuttle valve (310) and an oil outlet of the first shuttle valve (310) in sequence;
the second manual control valve (120) is opened by operating the hand lever, so that the pilot oil pumped by the pilot pump (500) flows into a second pilot oil port (622) of the three-dimensional four-way reversing valve through the second manual control valve (120), a first oil inlet of the second shuttle valve (320) and an oil outlet of the second shuttle valve (320) in sequence.
10. The control method according to claim 9, wherein the remote control includes:
the first electric control valve (210) is opened through the remote control assembly (400), so that the pilot oil pumped by the pilot pump (500) flows into a first pilot oil port (621) of the three-dimensional four-way reversing valve through the first electric control valve (210), a second oil inlet of the first shuttle valve (310) and an oil outlet of the first shuttle valve (310) in sequence;
and the second electric control valve (220) is opened through the remote control assembly (400), so that the pilot oil pumped by the pilot pump (500) flows into a second pilot oil port (622) of the three-dimensional four-way reversing valve through the second electric control valve (220), a second oil inlet of the second shuttle valve (320) and an oil outlet of the second shuttle valve (320) in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010272428.7A CN111350228A (en) | 2020-04-09 | 2020-04-09 | Excavator hydraulic control circuit and control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064711A (en) * | 2020-08-21 | 2020-12-11 | 中联重科股份有限公司 | Excavator remote control system, excavator remote control device and excavator |
| CN113585392A (en) * | 2021-08-05 | 2021-11-02 | 徐州徐工挖掘机械有限公司 | Hydraulic system of excavator and excavator |
| CN114233315A (en) * | 2021-12-15 | 2022-03-25 | 陕西小保当矿业有限公司 | Double-operation-mode explosion-proof diesel engine power slitting device and working method |
-
2020
- 2020-04-09 CN CN202010272428.7A patent/CN111350228A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064711A (en) * | 2020-08-21 | 2020-12-11 | 中联重科股份有限公司 | Excavator remote control system, excavator remote control device and excavator |
| CN113585392A (en) * | 2021-08-05 | 2021-11-02 | 徐州徐工挖掘机械有限公司 | Hydraulic system of excavator and excavator |
| CN114233315A (en) * | 2021-12-15 | 2022-03-25 | 陕西小保当矿业有限公司 | Double-operation-mode explosion-proof diesel engine power slitting device and working method |
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