Custom action priority control hydraulic system and excavator hydraulic control system

Abstract

The present invention provides a custom action priority control hydraulic system and an excavator hydraulic control system, which relate to the field of excavators and include an operator, a controller, a hydraulic actuator, and a hydraulic oil circuit; in the hydraulic oil circuit: a hydraulic pump is connected to a priority valve through a pipeline, the priority valve is connected to a reversing main valve through an oil circuit, and the reversing main valve is connected to the hydraulic actuator through a pipeline; a pilot pump is connected to the hydraulic pump, and the reversing main valve is connected to the pilot pump through a pipeline; a solenoid valve is respectively connected to the pilot pump and the priority valve through pipelines; the controller is connected to the solenoid valve, the operator is connected to the controller, the operator is configured to be able to send a control signal to the controller, and the controller is configured to be able to receive the control signal and control the opening and closing of the solenoid valve according to the control signal, thereby controlling the opening and closing of the priority valve. The present invention alleviates the technical problems existing in the prior art, such as the inability to perform autonomous mode priority selection for a certain action in a series of actions of an excavator, resulting in inconvenient operation and high labor costs.

Description

Technical Field

[0001] The present invention relates to the field of excavators, and more particularly to a custom action priority control hydraulic system and an excavator hydraulic control system. Background Art

[0002] At present, excavators are increasingly widely used in the field of construction machinery. An excavator has a variety of series of actions. For example, the leveling action and the dumping and loading action are the most commonly used series of actions of an excavator. Among the two construction actions included, the leveling action is the combined action of boom lifting and stick digging, and the dumping and loading action is the combined action of boom lifting and slewing. In many cases, it is necessary to adjust the leveling or dumping and loading actions under different construction conditions. However, after the operability of the current excavator is determined, the priority of the leveling action and the dumping and loading action has been determined, and the selection of the priority in the mode cannot be performed. To adapt to the leveling or dumping and loading operations under different construction conditions, it can only be controlled by the operator's experience, which requires a high level of the operator and thus results in a high labor cost.

[0003] In summary, the prior art at least has the technical problems that the priority of a certain action in the series of actions of an excavator cannot be autonomously selected in a mode, resulting in inconvenient operation and high labor cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a custom action priority control hydraulic system and an excavator hydraulic control system to alleviate the technical problems in the prior art that the priority of a certain action in the series of actions of an excavator cannot be autonomously selected in a mode, resulting in inconvenient operation and high labor cost.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a custom action priority control hydraulic system, including an operator, a controller, a hydraulic actuator, and a hydraulic oil circuit;

[0007] The hydraulic oil circuit includes a hydraulic pump, a priority valve, a reversing main valve, a pilot pump, and a solenoid valve;

[0008] The hydraulic pump is connected to the priority valve through a pipeline, the priority valve is connected to the reversing main valve through an oil circuit, and the reversing main valve is connected to the hydraulic actuator through a pipeline;

[0009] The pilot pump is connected to the hydraulic pump, and the reversing main valve is connected to the pilot pump through a pipeline; the solenoid valve is respectively connected to the pilot pump and the priority valve through pipelines;

[0010] The controller is connected to the solenoid valve, and the operator is connected to the controller. The operator is configured to be able to send a control signal to the controller, and the controller is configured to be able to receive the control signal and control the opening and closing of the solenoid valve according to the control signal, and further control the opening and closing of the priority valve.

[0011] Combined with the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect. Wherein, the solenoid valve adopts a proportional solenoid valve, and the controller is configured to be able to control the opening degree of the proportional solenoid valve according to the control signal under the condition that the proportional solenoid valve is opened, and further control the opening degree of the priority valve.

[0012] Combined with the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect. Wherein, the operator adopts a knob operator, and the knob operator has multiple selection levels, and each selection level corresponds to an opening degree of the solenoid valve.

[0013] Combined with the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect. Wherein, the hydraulic actuator includes a first hydraulic actuator and a second hydraulic actuator, the priority valve includes a first priority valve and a second priority valve, the reversing main valve includes a first reversing main valve and a second reversing main valve, and the solenoid valve includes a first solenoid valve and a second solenoid valve;

[0014] The hydraulic pump is connected to the first priority valve through a pipeline, the first priority valve is connected to the first reversing main valve through an oil circuit, and the first reversing main valve is connected to the first hydraulic actuator through a pipeline; the first reversing main valve is connected to the pilot pump through a pipeline; the first solenoid valve is respectively connected to the pilot pump and the first priority valve through pipelines; the controller is configured to be able to control the opening and closing of the first solenoid valve according to the control signal, and further control the opening and closing of the first priority valve;

[0015] The hydraulic pump is also connected to the second priority valve through a pipeline, the second priority valve is connected to the second reversing main valve through an oil circuit, and the second reversing main valve is connected to the second hydraulic actuator through a pipeline; the second reversing main valve is connected to the pilot pump through a pipeline; the second solenoid valve is respectively connected to the pilot pump and the second priority valve through pipelines; the controller is configured to be able to control the opening and closing of the second solenoid valve according to the control signal, and further control the opening and closing of the second priority valve.

[0016] Combined with the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the controller is configured to: in a first working condition, control the first solenoid valve to open and the second solenoid valve to close according to the control signal, and further control the first priority valve to open and the second priority valve to close; and in a second working condition, control the second solenoid valve to open and the first solenoid valve to close according to the control signal, and further control the second priority valve to open and the first priority valve to close.

[0017] Combined with the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein both the first solenoid valve and the second solenoid valve are proportional solenoid valves;

[0018] The controller is configured to: be able to control the opening degree of the first solenoid valve according to the control signal in the working condition where the first solenoid valve is open, and further control the opening degree of the first priority valve; or, in the working condition where the second solenoid valve is open, control the opening degree of the second solenoid valve according to the control signal, and further control the opening degree of the second priority valve.

[0019] Combined with the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the operator is a knob operator, and the knob operator has a first gear position and a second gear position, and the first gear position and the second gear position respectively have multiple selection levels;

[0020] The first gear position corresponds to the first solenoid valve being open and the second solenoid valve being closed, and the second gear position corresponds to the second solenoid valve being open and the first solenoid valve being closed; each of the selection levels respectively corresponds to an opening degree of the solenoid valve that is open in the corresponding gear position.

[0021] In a second aspect, an embodiment of the present invention provides an excavator hydraulic control system, which includes the custom action priority control hydraulic system provided by the first aspect and one of its first and second possible implementation manners, wherein the hydraulic actuator is a boom cylinder or a swing motor.

[0022] In a third aspect, an embodiment of the present invention provides another excavator hydraulic control system, which includes the custom action priority control hydraulic system provided by one of the third to sixth possible implementation manners of the first aspect, wherein the first hydraulic actuator is one of a boom cylinder and a swing motor, and the second hydraulic actuator is the other of a boom cylinder and a swing motor.

[0023] Combined with the second aspect or the third aspect, an embodiment of the present invention provides a possible implementation manner of the second aspect or the third aspect. Wherein, the hydraulic control system of the excavator further includes a boom cylinder, a boom reversing main valve, and a boom hydraulic pump; the boom hydraulic pump is connected in series with the hydraulic pump; the boom reversing main valve is connected to the boom hydraulic pump through a pipeline; the boom reversing main valve is connected to the boom cylinder through a pipeline; the boom reversing main valve is connected to the pilot pump through a pipeline.

[0024] The embodiments of the present invention can achieve the following beneficial effects:

[0025] In a first aspect, an embodiment of the present invention provides a custom action priority control hydraulic system, including an operator, a controller, a hydraulic actuator, and a hydraulic oil circuit. Specifically, the hydraulic oil circuit includes a hydraulic pump, a priority valve, a reversing main valve, a pilot pump, and a solenoid valve. More specifically, the hydraulic pump is connected to the priority valve through a pipeline, the priority valve is connected to the reversing main valve through an oil circuit, and the reversing main valve is connected to the hydraulic actuator through a pipeline; the pilot pump is connected to the hydraulic pump, and the reversing main valve is connected to the pilot pump through a pipeline; the solenoid valve is respectively connected to the pilot pump and the priority valve through pipelines; the controller is connected to the solenoid valve, the operator is connected to the controller, the operator is configured to be able to send a control signal to the controller, and the controller is configured to be able to receive the control signal and control the opening and closing of the solenoid valve according to the control signal, thereby controlling the opening and closing of the priority valve.

[0026] In the embodiment of the present invention, the engine provides power for the hydraulic pump, the hydraulic pump is connected to the hydraulic actuator through the main oil circuit, a priority valve and a reversing main valve are sequentially arranged on the main oil circuit from near the hydraulic pump to far from the hydraulic pump. At the same time, a pilot pump connected in series with the hydraulic pump provides a pilot pressure, and the pilot pressure can push the reversing main valve to change its direction. The opening and closing of the priority valve and the direction change of the reversing main valve can both connect or cut off the main oil circuit. During operation, if it is necessary to start the hydraulic actuator preferentially, then: first, use the pilot pressure provided by the pilot pump to push the reversing main valve to change its direction to conduct the main oil circuit, and then, send a control signal from the operator to the controller. After receiving the control signal, the controller controls the solenoid valve to open according to the control signal, and then controls the priority valve to open. When the priority valve opens, hydraulic oil in the main oil circuit flows into the hydraulic actuator through the reversing main valve, thereby driving the hydraulic actuator to act; when it is necessary to stop the hydraulic actuator from acting, the pilot pump stops providing pilot pressure to the reversing main valve, and the reversing main valve returns to its original position, cutting off the main oil circuit, so that the hydraulic actuator stops acting.

[0027] In multiple alternative implementation manners of this embodiment, the hydraulic drive part of the stick cylinder or swing motor or other action structural parts of the excavator can be used as the hydraulic actuator. In this embodiment, the operator can manually control whether the hydraulic actuator acts preferentially. The overall structure of this embodiment is simple, convenient and easy to implement, has low requirements for operators, is beneficial to saving labor costs, and can reduce the operation error rate and improve the engineering safety.

[0028] In a second aspect, an embodiment of the present invention provides an excavator hydraulic control system, which includes the aforementioned custom action priority control hydraulic system, wherein the hydraulic actuator is a boom cylinder or a swing motor.

[0029] In a third aspect, an embodiment of the present invention provides another excavator hydraulic control system, which includes the aforementioned custom action priority control hydraulic system, and the hydraulic actuator includes a first hydraulic actuator and a second hydraulic actuator, the priority valve includes a first priority valve and a second priority valve, the main directional control valve includes a first main directional control valve and a second main directional control valve, and the solenoid valve includes a first solenoid valve and a second solenoid valve; the controller is configured to be able to control the opening and closing of the first solenoid valve according to a regulation signal, and then control the opening and closing of the first priority valve, and, according to the regulation signal, control the opening and closing of the first solenoid valve, and then control the opening and closing of the first priority valve, wherein the first hydraulic actuator is one of a boom cylinder and a swing motor, and the second hydraulic actuator is the other of a boom cylinder and a swing motor.

[0030] Since the excavator hydraulic control systems provided in the second and third aspects of the embodiments of the present invention both include the custom action priority control hydraulic system provided in the first aspect, therefore, the excavator hydraulic control systems provided in the second and third aspects of the embodiments of the present invention can both achieve all the beneficial effects that the custom action priority control hydraulic system provided in the first aspect can achieve. For other beneficial effects that the excavator hydraulic control systems provided in the second and third aspects of the embodiments of the present invention can achieve, please refer to the description in the specific implementation part of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation manners of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. Obviously, the drawings in the following description are some implementation manners of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure of an alternative embodiment of the custom action priority control hydraulic system provided in Embodiment 1 of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of another alternative embodiment of the custom action priority control hydraulic system provided in Embodiment 1 of the present invention;

[0034] Figure 3 It is a schematic diagram of the overall structure of the custom action priority control hydraulic system provided in Embodiment 2 of the present invention;

[0035] Figure 4 This is a schematic diagram of the overall structure of an alternative embodiment of the hydraulic control system of an excavator provided in Embodiment 5 of the present invention.

[0036] Icons: 100 - Operator; 200 - Controller; 300 - Hydraulic actuator; 310 - First hydraulic actuator; 320 - Second hydraulic actuator; 410 - Hydraulic pump; 420 - Priority valve; 421 - First priority valve; 422 - Second priority valve; 430 - Main directional valve; 431 - First main directional valve; 432 - Second main directional valve; 440 - Pilot pump; 450 - Solenoid valve; 451 - First solenoid valve; 452 - Second solenoid valve; 500 - Boom cylinder; 510 - Boom main directional valve; 520 - Boom hydraulic pump; 600 - Engine. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "left", "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] Embodiment 1

[0044] This embodiment provides a custom action priority control hydraulic system. Referring to Figure 1 and Figure 2 , the custom action priority control hydraulic system includes an operator 100, a controller 200, a hydraulic actuator 300, and a hydraulic oil circuit. Specifically, the hydraulic oil circuit includes a hydraulic pump 410, a priority valve 420, a reversing main valve 430, a pilot pump 440, and a solenoid valve 450. More specifically, the hydraulic pump 410 is connected to the priority valve 420 through a pipeline, the priority valve 420 is connected to the reversing main valve 430 through an oil circuit, and the reversing main valve 430 is connected to the hydraulic actuator 300 through a pipeline; the pilot pump 440 is connected to the hydraulic pump 410, and the reversing main valve 430 is connected to the pilot pump 440 through a pilot oil circuit (the pilot oil circuit is not fully shown in the figure); the solenoid valve 450 is respectively connected to the pilot pump 440 and the priority valve 420 through pipelines; the controller 200 is connected to the solenoid valve 450, the operator 100 is connected to the controller 200, the operator 100 is configured to be able to send a control signal to the controller 200, and the controller 200 is configured to be able to receive the control signal and control the opening and closing of the solenoid valve 450 according to the control signal, and further control the opening and closing of the priority valve 420.

[0045] In this embodiment, by Figure 1The engine 600 therein powers the hydraulic pump 410. The hydraulic pump 410 is connected to the hydraulic actuator 300 through the main oil circuit. A priority valve 420 and a reversing main valve 430 are sequentially arranged on the main oil circuit from near the hydraulic pump 410 to away from the hydraulic pump 410. At the same time, a pilot pump 440 connected in series with the hydraulic pump 410 provides a pilot pressure, and the pilot pressure can push the reversing main valve 430 to change its direction. The opening and closing of the priority valve 420 and the direction change of the reversing main valve 430 can both connect or cut off the main oil circuit. During operation, if it is necessary to start the hydraulic actuator 300 preferentially, then: First, use the pilot pressure provided by the pilot pump 440 to push the reversing main valve 430 to change its direction to conduct the main oil circuit. Then, send a control signal to the controller 200 through the operator 100. After receiving the control signal, the controller 200 controls the solenoid valve 450 to open according to the control signal and then controls the priority valve 420 to open. When the priority valve 420 opens, hydraulic oil in the main oil circuit flows into the hydraulic actuator 300 through the reversing main valve 430, thereby driving the hydraulic actuator 300 to act. When it is necessary to stop the hydraulic actuator 300 from acting, the pilot pump 440 stops providing the pilot pressure to the reversing main valve 430, and the reversing main valve 430 returns to its original position, cutting off the main oil circuit, so that the hydraulic actuator 300 stops acting.

[0046] In multiple alternative embodiments of this embodiment, the hydraulic drive part of the boom cylinder or swing motor or other moving structural parts of the excavator can be used as the hydraulic actuator 300. For example, referring to Figure 1 , that is, using the boom cylinder of the excavator as the hydraulic actuator 300, referring to Figure 2 , then using the swing motor of the excavator as the hydraulic actuator 300. In this embodiment, the operator 100 can manually control whether the hydraulic actuator 300 acts preferentially. The overall structure of this embodiment is simple, convenient to implement, has low requirements for operators, is beneficial to saving labor costs, and can reduce the operation error rate and improve the engineering safety.

[0047] In an alternative embodiment of this embodiment, preferably, the solenoid valve 450 is a proportional solenoid valve, and the controller 200 is configured to be able to control the opening degree of the proportional solenoid valve according to the control signal under the condition that the proportional solenoid valve is opened, and then control the opening degree of the priority valve 420. Through such a structure, the flow rate of the hydraulic oil entering the reversing main valve 430 can be controlled by adjusting the opening degree of the priority valve 420, so as to adjust the flow rate of the hydraulic oil that the main oil circuit can enter the hydraulic actuator 300, and further achieve the function of controlling the action speed of the hydraulic actuator 300.

[0048] Further preferably, the operator 100 adopts a knob operator, and the knob operator has multiple selection levels, and each selection level corresponds to an opening degree of the solenoid valve 450. Thus, the opening degree of the solenoid valve 450 can be changed by rotating the knob on the knob operator corresponding to the selection level, and further the action speed of the hydraulic actuator 300 can be controlled, which has the beneficial effects of simple operation selection and strong practicability.

[0049] Embodiment 2

[0050] This embodiment provides a custom action priority control hydraulic system. Refer to Figure 3 , the custom action priority control hydraulic system includes an operator 100, a controller 200, a hydraulic actuator 300 and a hydraulic oil circuit. Specifically, the hydraulic oil circuit includes a hydraulic pump 410, a priority valve 420, a reversing main valve 430, a pilot pump 440 and a solenoid valve 450. More specifically, the hydraulic pump 410 is connected to the priority valve 420 through a pipeline, the priority valve 420 is connected to the reversing main valve 430 through an oil circuit, and the reversing main valve 430 is connected to the hydraulic actuator 300 through a pipeline; the pilot pump 440 is connected to the hydraulic pump 410, and the reversing main valve 430 and the pilot pump 440 are connected through a pilot oil circuit (the pilot oil circuit is not fully shown); the solenoid valve 450 is respectively connected to the pilot pump 440 and the priority valve 420 through pipelines; the controller 200 is connected to the solenoid valve 450, the operator 100 is connected to the controller 200, the operator 100 is configured to be able to send a control signal to the controller 200, and the controller 200 is configured to be able to receive the control signal and control the opening and closing of the solenoid valve 450 according to the control signal, and further control the opening and closing of the priority valve 420.

[0051] The above hydraulic actuator 300 includes a first hydraulic actuator 310 and a second hydraulic actuator 320. The priority valve 420 includes a first priority valve 421 and a second priority valve 422. The main directional valve 430 includes a first main directional valve 431 and a second main directional valve 432. The solenoid valve 450 includes a first solenoid valve 451 and a second solenoid valve 452. The hydraulic pump 410 is connected to the first priority valve 421 through a pipeline. The first priority valve 421 is connected to the first main directional valve 431 through an oil circuit. The first main directional valve 431 is connected to the first hydraulic actuator 310 through a pipeline. The first main directional valve 431 is connected to the pilot pump 440 through a pipeline. The first solenoid valve 451 is respectively connected to the pilot pump 440 and the first priority valve 421 through pipelines. The controller 200 is configured to be able to control the opening and closing of the first solenoid valve 451 according to a control signal, and further control the opening and closing of the first priority valve 421. The hydraulic pump 410 is also connected to the second priority valve 422 through a pipeline. The second priority valve 422 is connected to the second main directional valve 432 through an oil circuit. The second main directional valve 432 is connected to the second hydraulic actuator 320 through a pipeline. The second main directional valve 432 is connected to the pilot pump 440 through a pipeline. The second solenoid valve 452 is respectively connected to the pilot pump 440 and the second priority valve 422 through pipelines. The controller 200 is configured to be able to control the opening and closing of the second solenoid valve 452 according to a control signal, and further control the opening and closing of the second priority valve 422.

[0052] In this embodiment, the engine 600 in Figure 3 can provide power for the hydraulic pump 410. The hydraulic pump 410 is connected to the first hydraulic actuator 310 through a first main oil circuit. The first priority valve 421 and the first main directional valve 431 are sequentially arranged on the first main oil circuit from near the hydraulic pump 410 to far from the hydraulic pump 410. At the same time, the pilot pump 440 connected in series with the hydraulic pump 410 can provide pilot pressure for the first main directional valve 431. The pilot pressure can push the first main directional valve 431 to change direction. The opening and closing of the first priority valve 421 and the change of direction of the first main directional valve 431 can both connect or cut off the first main oil circuit. The hydraulic pump 410 is also connected to the second hydraulic actuator 320 through a second main oil circuit. The second priority valve 422 and the second main directional valve 432 are sequentially arranged on the second main oil circuit from near the hydraulic pump 410 to far from the hydraulic pump 410. At the same time, the pilot pump 440 connected in series with the hydraulic pump 410 can provide pilot pressure for the second main directional valve 432. The pilot pressure can push the second main directional valve 432 to change direction. The opening and closing of the second priority valve 422 and the change of direction of the second main directional valve 432 can both connect or cut off the second main oil circuit.

[0053] During operation, if it is necessary to start the first hydraulic actuator 310 preferentially, the following steps are taken: First, use the pilot pressure provided by the pilot pump 440 to push the first reversing main valve 431 to reverse to conduct the first main oil circuit. Then, send a control signal from the operator 100 to the controller 200. After receiving the control signal, the controller 200 controls the first solenoid valve 451 to open according to the control signal, and then controls the first priority valve 421 to open. When the first priority valve 421 opens, hydraulic oil in the first main oil circuit flows into the first hydraulic actuator 310 through the first reversing main valve 431, thereby driving the first hydraulic actuator 310 to act. When it is necessary to stop the first hydraulic actuator 310 from acting, stop the pilot pump 440 from providing pilot pressure to the first reversing main valve 431. The first reversing main valve 431 returns to its original position, and the first main oil circuit is cut off, so that the first hydraulic actuator 310 stops acting. If it is necessary to start the second hydraulic actuator 320 preferentially, the following steps are taken: First, use the pilot pressure provided by the pilot pump 440 to push the second reversing main valve 432 to reverse to conduct the second main oil circuit. Then, send a control signal from the operator 100 to the controller 200. After receiving the control signal, the controller 200 controls the second solenoid valve 452 to open according to the control signal, and then controls the second priority valve 422 to open. When the second priority valve 422 opens, hydraulic oil in the second main oil circuit flows into the second hydraulic actuator 320 through the second reversing main valve 432, thereby driving the second hydraulic actuator 320 to act. When it is necessary to stop the second hydraulic actuator 320 from acting, stop the pilot pump 440 from providing pilot pressure to the second reversing main valve 432. The second reversing main valve 432 returns to its original position, and the second main oil circuit is cut off, so that the second hydraulic actuator 320 stops acting. If it is necessary to start the first hydraulic actuator 310 and the second hydraulic actuator 320 simultaneously prior to other actuators, the first hydraulic actuator 310 and the second hydraulic actuator 320 can be started simultaneously in the above manner. When closing, the first main oil circuit and the second main oil circuit can be cut off simultaneously or the first main oil circuit and the second main oil circuit can be cut off sequentially according to the required order.

[0054] In multiple alternative embodiments of this embodiment, one of the boom cylinder and the swing motor of the excavator can be used as the first hydraulic actuator 310, and the other of the boom cylinder and the swing motor of the excavator can be used as the second hydraulic actuator 320. For example, referring to Figure 3 , that is, using the boom cylinder of the excavator as the first hydraulic actuator 310 and the swing motor of the excavator as the second hydraulic actuator 320. In this embodiment, the operator 100 can manually control whether the first hydraulic actuator 310 and the second hydraulic actuator 320 act preferentially. The overall structure of this embodiment is simple, convenient and easy to implement, has low requirements for operators, is beneficial to saving labor costs, and can reduce the operation error rate and improve the engineering safety.

[0055] Under many construction conditions of this embodiment, preferably, the controller 200 is configured to: in the first condition, control the first solenoid valve 451 to open and the second solenoid valve 452 to close according to the control signal, and then control the first priority valve 421 to open and the second priority valve 422 to close; and in the second condition, control the second solenoid valve 452 to open and the first solenoid valve 451 to close according to the control signal, and then control the second priority valve 422 to open and the first priority valve 421 to close, so as to selectively start the first hydraulic actuator 310 or the second hydraulic actuator 320 preferentially.

[0056] In the above-preferred embodiment, further preferably, both the first solenoid valve 451 and the second solenoid valve 452 are proportional solenoid valves; the controller 200 is configured to: in the condition where the first solenoid valve 451 is open, control the opening degree of the first solenoid valve 451 according to the control signal, and then control the opening degree of the first priority valve 421; or, in the condition where the second solenoid valve 452 is open, control the opening degree of the second solenoid valve 452 according to the control signal, and then control the opening degree of the second priority valve 422. With such a structure, the flow rate entering the first reversing main valve 431 or the second reversing main valve 432 can be controlled by adjusting the opening degree of the first priority valve 421 or the second priority valve 422, so as to adjust the hydraulic oil flow rate that the first main oil circuit can enter the first hydraulic actuator 310 and the hydraulic oil flow rate that the second main oil circuit can enter the second hydraulic actuator 320, and further achieve the function of controlling the action speed of the first hydraulic actuator 310 and the second hydraulic actuator 320.

[0057] Further preferably, the operator 100 adopts a knob operator, and the knob operator has a first gear position and a second gear position, and the first gear position and the second gear position respectively have multiple selection levels; the first gear position corresponds to the first solenoid valve 451 being open and the second solenoid valve 452 being closed, and the second gear position corresponds to the second solenoid valve 452 being open and the first solenoid valve 451 being closed; each selection level respectively corresponds to an opening degree of the solenoid valve 450 that is open in the corresponding gear position. Thus, the selective action of the first hydraulic actuator 310 and the second hydraulic actuator 320 can be selected by rotating the knob on the knob operator to correspond to the gear position, and at the same time, after selecting the action of one hydraulic actuator 300, rotate to the required level to change the opening degree of the corresponding solenoid valve 450, and then control the action speed of the corresponding hydraulic actuator 300, which has the beneficial effects of simple operation selection and strong practicability.

[0058] Embodiment III

[0059] This embodiment provides an excavator hydraulic control system, which includes the custom action priority control hydraulic system provided by any one of the optional implementation manners in Embodiment 1. Among them, the hydraulic actuator 300 is a boom cylinder or a swing motor. Since it includes the custom action priority control hydraulic system described in Embodiment 1, the excavator hydraulic control system provided in this embodiment can achieve all the beneficial effects that the custom action priority control hydraulic system in Embodiment 1 can achieve. The effects that the same structures in this embodiment and Embodiment 1 can achieve can be obtained by referring to the optional or preferred implementation manners in Embodiment 1.

[0060] Embodiment 4

[0061] This embodiment provides another excavator hydraulic control system, which includes the custom action priority control hydraulic system provided by any one of the optional implementation manners in Embodiment 2. Among them, the first hydraulic actuator 310 is one of a boom cylinder and a swing motor, and the second hydraulic actuator 320 is the other of a boom cylinder and a swing motor. Since it includes the custom action priority control hydraulic system described in Embodiment 2, the excavator hydraulic control system provided in this embodiment can achieve all the beneficial effects that the custom action priority control hydraulic system in Embodiment 2 can achieve. The effects that the same structures in this embodiment and Embodiment 2 can achieve can be obtained by referring to the optional or preferred implementation manners in Embodiment 2.

[0062] Embodiment 5

[0063] This embodiment provides an excavator hydraulic control system. Referring to Figure 4 , on the basis of the excavator hydraulic control system provided in the above Embodiment 3 or Embodiment 4, further, it further includes a boom cylinder 500, a boom reversing main valve 510, and a boom hydraulic pump 520; the boom hydraulic pump 520 is connected in series with the hydraulic pump 410; the boom reversing main valve 510 is connected to the boom hydraulic pump 520 through a pipeline; the boom reversing main valve 510 is connected to the boom cylinder 500 through a pipeline; the boom reversing main valve 510 is connected to the pilot pump 440 through a boom pilot oil circuit pipeline (the boom pilot oil circuit is not fully shown), where Figure 4 Taking the further setting of the boom cylinder 500, the boom reversing main valve 510, and the boom hydraulic pump 520 on the basis of the excavator hydraulic control system provided in the above Embodiment 4 as an example for illustration, the drawings for the further setting of the boom cylinder 500, the boom reversing main valve 510, and the boom hydraulic pump 520 on the basis of the excavator hydraulic control system provided in Embodiment 3 can be obtained by Figure 4 modification.

[0064] In this embodiment, the engine 600 provides power to both the hydraulic pump 410 and the boom hydraulic pump 520 simultaneously. The pilot pressure provided by the pilot pump 440 can push the boom reversing main valve 510 to reverse and conduct the oil path connecting the boom hydraulic pump 520 to the boom cylinder 500, so as to drive the boom cylinder 500 to act. This action is carried out simultaneously with the action of the first hydraulic actuator 310 or the action of the second hydraulic actuator 320 to cooperate with each other to complete the leveling action and the action of swinging and loading of the excavator.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A custom action priority control hydraulic system, characterized in that, It includes an operator (100), a controller (200), a hydraulic actuator (300), and a hydraulic oil circuit; The hydraulic oil circuit includes a hydraulic pump (410), a priority valve (420), a main directional control valve (430), a pilot pump (440), and a solenoid valve (450); The hydraulic pump (410) is connected to the priority valve (420) through a pipeline, the priority valve (420) is connected to the main directional control valve (430) through an oil circuit, and the main directional control valve (430) is connected to the hydraulic actuator (300) through a pipeline; The pilot pump (440) is connected to the hydraulic pump (410), and the main directional control valve (430) is connected to the pilot pump (440) through a pipeline; the solenoid valve (450) is respectively connected to the pilot pump (440) and the priority valve (420) through pipelines; The controller (200) is connected to the solenoid valve (450), the operator (100) is connected to the controller (200), the operator (100) is configured to be able to send a control signal to the controller (200), and the controller (200) is configured to be able to receive the control signal and control the opening and closing of the solenoid valve (450) according to the control signal, thereby controlling the opening and closing of the priority valve (420); The solenoid valve (450) is a proportional solenoid valve, and the controller (200) is configured to be able to control the opening degree of the proportional solenoid valve according to the control signal under the condition that the proportional solenoid valve is opened, thereby controlling the opening degree of the priority valve (420); The hydraulic actuator (300) includes the hydraulic drive part of an excavator.

2. The custom action priority control hydraulic system according to claim 1, characterized in that, The operator (100) is a knob operator, and the knob operator has multiple selection levels, and each selection level corresponds to a certain opening degree of the solenoid valve (450).

3. The custom action priority control hydraulic system according to claim 1, wherein The hydraulic actuator (300) includes a first hydraulic actuator (310) and a second hydraulic actuator (320), the priority valve (420) includes a first priority valve (421) and a second priority valve (422), the main directional control valve (430) includes a first main directional control valve (431) and a second main directional control valve (432), and the solenoid valve (450) includes a first solenoid valve (451) and a second solenoid valve (452); The hydraulic pump (410) is connected to the first priority valve (421) through a pipeline, the first priority valve (421) is connected to the first main directional control valve (431) through an oil circuit, and the first main directional control valve (431) is connected to the first hydraulic actuator (310) through a pipeline; the first main directional control valve (431) is connected to the pilot pump (440) through a pipeline; the first solenoid valve (451) is respectively connected to the pilot pump (440) and the first priority valve (421) through pipelines; the controller (200) is configured to be able to control the opening and closing of the first solenoid valve (451) according to the control signal, thereby controlling the opening and closing of the first priority valve (421); The hydraulic pump (410) is also connected to the second priority valve (422) through a pipeline. The second priority valve (422) is connected to the second main directional control valve (432) through an oil circuit. The second main directional control valve (432) is connected to the second hydraulic actuator (320) through a pipeline. The second main directional control valve (432) is connected to the pilot pump (440) through a pipeline. The second solenoid valve (452) is respectively connected to the pilot pump (440) and the second priority valve (422) through pipelines. The controller (200) is configured to be able to control the opening and closing of the second solenoid valve (452) according to the regulation signal, and further control the opening and closing of the second priority valve (422).

4. The custom action priority control hydraulic system according to claim 3, wherein The controller (200) is configured as follows: Under the first working condition, according to the regulation signal, control the first solenoid valve (451) to open and the second solenoid valve (452) to close, and further control the first priority valve (421) to open and the second priority valve (422) to close; and under the second working condition, according to the regulation signal, control the second solenoid valve (452) to open and the first solenoid valve (451) to close, and further control the second priority valve (422) to open and the first priority valve (421) to close.

5. The custom action priority control hydraulic system according to claim 4, wherein Both the first solenoid valve (451) and the second solenoid valve (452) adopt proportional solenoid valves; The controller (200) is configured to be able to, under the condition that the first solenoid valve (451) is open, control the opening degree of the first solenoid valve (451) according to the regulation signal, and further control the opening degree of the first priority valve (421); or, under the condition that the second solenoid valve (452) is open, control the opening degree of the second solenoid valve (452) according to the regulation signal, and further control the opening degree of the second priority valve (422).

6. The custom action priority control hydraulic system according to claim 5, characterized in that, The operator (100) adopts a knob operator, and the knob operator has a first gear position and a second gear position. The first gear position and the second gear position respectively have multiple selection levels; The first gear position corresponds to the first solenoid valve (451) being open and the second solenoid valve (452) being closed. The second gear position corresponds to the second solenoid valve (452) being open and the first solenoid valve (451) being closed. Each of the selection levels respectively corresponds to an opening degree of the solenoid valve (450) that is open in the corresponding gear position.

7. A hydraulic control system for an excavator, characterized in that, It includes the custom action priority control hydraulic system according to claim 1 or 2, and the hydraulic actuator (300) is a boom cylinder or a swing motor.

8. An excavator hydraulic control system, characterized in that, It includes the custom action priority control hydraulic system according to any one of claims 3 to 6. The first hydraulic actuator (310) is one of a boom cylinder and a swing motor, and the second hydraulic actuator (320) is the other of a boom cylinder and a swing motor.

9. The hydraulic control system of an excavator according to claim 7 or 8, characterized in that The excavator hydraulic control system further includes a boom cylinder (500), a boom main directional control valve (510), and a boom hydraulic pump (520); The boom hydraulic pump (520) is connected in series with the hydraulic pump (410); the boom reversing main valve (510) is connected to the boom hydraulic pump (520) through pipelines; the boom reversing main valve (510) is connected to the boom cylinder (500) through pipelines; the boom reversing main valve (510) is connected to the pilot pump (440) through pipelines.

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