CN211774103U

CN211774103U - Self-defined action priority control hydraulic system and excavator hydraulic control system

Info

Publication number: CN211774103U
Application number: CN202020474779.1U
Authority: CN
Inventors: 孙国印; 叶其团; 秦斌
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-10-27
Anticipated expiration: 2030-04-03

Abstract

The utility model provides a self-defined action priority control hydraulic system and an excavator hydraulic control system, which relate to the field of excavators and comprise an operator, a controller, a hydraulic actuator and a hydraulic oil circuit; in the hydraulic oil circuit: the hydraulic pump is connected with a priority valve pipeline, the priority valve is connected with a reversing main valve oil pipeline, and the reversing main valve is connected with a hydraulic actuator pipeline; the pilot pump is connected with the hydraulic pump, and the reversing main valve is connected with a pilot pump pipeline; the electromagnetic valve is respectively connected with the pilot pump and the priority valve pipeline; the controller is connected with the electromagnetic valve, the operator is connected with the controller, the operator is configured to send a regulation signal to the controller, and the controller is configured to receive the regulation signal and regulate the opening and closing of the electromagnetic valve according to the regulation signal so as to regulate the opening and closing of the priority valve. The utility model discloses it can't carry out autonomy mode preference to certain action in the series of actions of excavator to have alleviated and to have existed among the prior art to operate technical problem inconvenient, that the cost of labor is high.

Description

Self-defined action priority control hydraulic system and excavator hydraulic control system

Technical Field

The utility model belongs to the technical field of the excavator and specifically relates to a self-defined action priority control hydraulic system and excavator hydraulic control system are related to.

Background

At present, the application of the excavator in the field of engineering machinery is more and more extensive, and the excavator has a plurality of series of actions, for example, a flat ground action and a swing square loading action are the most common series of actions of the excavator, and of the two construction actions, the flat ground action, namely a composite action of a movable arm lifting and bucket rod excavator, and the swing square loading action, namely a movable arm lifting and turning action, are included, and the flat ground or swing square loading action under different construction conditions needs to be adjusted in many times. However, when the operability of the excavator is determined, the priority of the land leveling operation and the dump truck loading operation is already determined, and the mode priority cannot be selected. In order to adapt to the operation of flatting or swinging a car under different construction working conditions, the operation can be controlled only by the experience of an operator, and the requirement on the operator is high, so that the labor cost is high.

In summary, the prior art has at least the technical problems of inconvenience in operation and high labor cost due to the fact that the autonomous mode priority selection cannot be performed on any one of the serial actions of the excavator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self-defined action priority control hydraulic system and excavator hydraulic control system to alleviate a certain action in the series action of the unable excavator that exists among the prior art and carry out autonomic mode preference, thereby operate inconvenient, the high technical problem of cost of labor.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, an embodiment of the present invention provides a self-defined action priority control hydraulic system, which includes an operator, a controller, a hydraulic actuator, and a hydraulic oil path;

the hydraulic oil way comprises a hydraulic pump, a priority valve, a reversing main valve, a pilot pump and an electromagnetic valve;

the hydraulic pump is connected with the priority valve pipeline, the priority valve is connected with the reversing main valve oil pipeline, and the reversing main valve is connected with the hydraulic actuator pipeline;

the pilot pump is connected with the hydraulic pump, and the reversing main valve is connected with the pilot pump pipeline; the electromagnetic valve is respectively connected with the pilot pump and the priority valve pipeline;

the controller is connected with the electromagnetic valve, the operator is connected with the controller, the operator is configured to send a regulation signal to the controller, and the controller is configured to receive the regulation signal and regulate the opening and closing of the electromagnetic valve according to the regulation signal so as to regulate the opening and closing of the priority valve.

In combination with the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the electromagnetic valve adopts a proportional electromagnetic valve, the controller is configured to be able to regulate and control the opening size of the proportional electromagnetic valve according to the regulation and control signal under the working condition that the proportional electromagnetic valve is opened, and then regulate and control the opening size of the priority valve.

With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the operator employs a knob operator, and the knob operator has a plurality of selection levels, and each of the selection levels corresponds to an opening size of the solenoid valve.

In combination with the first aspect, an 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 direction-changing main valve includes a first direction-changing main valve and a second direction-changing main valve, and the solenoid valve includes a first solenoid valve and a second solenoid valve;

the hydraulic pump is connected with the first priority valve pipeline, the first priority valve is connected with the first reversing main valve oil pipeline, and the first reversing main valve is connected with the first hydraulic actuator pipeline; the first reversing main valve is connected with the pilot pump pipeline; the first electromagnetic valve is respectively connected with the pilot pump and the first priority valve pipeline; the controller is configured to regulate the first electromagnetic valve to be opened and closed according to the regulation signal, and further regulate the first priority valve to be opened and closed;

the hydraulic pump is also connected with a second priority valve pipeline, the second priority valve is connected with a second reversing main valve oil way, and the second reversing main valve is connected with a second hydraulic actuating mechanism pipeline; the second reversing main valve is connected with the pilot pump pipeline; the second electromagnetic valve is respectively connected with the pilot pump and the second priority valve pipeline; the controller is configured to regulate the second electromagnetic valve to open and close according to the regulation signal, and further regulate the second priority valve to open and close.

With reference to the third possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the controller is configured to: under a first working condition, the first electromagnetic valve is controlled to be opened and the second electromagnetic valve is controlled to be closed according to the control signal, and then the first priority valve is controlled to be opened and the second priority valve is controlled to be closed; and under a second working condition, the second electromagnetic valve is controlled to be opened and the first electromagnetic valve is controlled to be closed according to the control signal, and then the second priority valve is controlled to be opened and the first priority valve is controlled to be closed.

With reference to 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 the first solenoid valve and the second solenoid valve both employ proportional solenoid valves;

the controller is configured to: under the working condition that the first electromagnetic valve is opened, the opening degree of the first electromagnetic valve can be regulated and controlled according to the regulation and control signal, and then the opening degree of the first priority valve is regulated and controlled; or under the working condition that the second electromagnetic valve is opened, the opening degree of the second electromagnetic valve is regulated and controlled according to the regulation and control signal, and then the opening degree of the second priority valve is regulated and controlled.

With reference to the fifth possible implementation manner of the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the operator employs a knob operator, and the knob operator has a first gear and a second gear, and the first gear and the second gear respectively have multiple selection levels;

the first gear corresponds to the first electromagnetic valve being opened and the second electromagnetic valve being closed, and the second gear corresponds to the second electromagnetic valve being opened and the first electromagnetic valve being closed; each of the selection levels corresponds to an opening degree of the solenoid valve opened in the corresponding gear.

In a second aspect, an embodiment of the present invention provides an excavator hydraulic control system, which includes the self-defined action priority control hydraulic system provided by one of the first aspect and the first and second possible embodiments, wherein the hydraulic actuator is a dipper cylinder or a swing motor.

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

With reference to the second aspect or the third aspect, embodiments of the present invention provide a possible implementation manner of the second aspect or the third aspect, wherein the excavator hydraulic control system further includes a boom cylinder, a boom reversing main valve, and a boom hydraulic pump; the boom hydraulic pump and the hydraulic pump are connected in series; the movable arm reversing main valve is connected with the movable arm hydraulic pump pipeline; the movable arm reversing main valve is connected with the movable arm oil cylinder pipeline; and the movable arm reversing main valve is connected with the pilot pump pipeline.

The embodiment of the utility model provides a can realize following beneficial effect:

in a first aspect, the embodiment of the present invention provides a self-defined action priority control hydraulic system, including operator, controller, hydraulic actuator and hydraulic oil circuit, specifically, the hydraulic oil circuit includes hydraulic pump, priority valve, switching-over main valve, guide's pump and solenoid valve. More specifically, the hydraulic pump is connected with a priority valve pipeline, the priority valve is connected with a reversing main valve oil pipeline, and the reversing main valve is connected with a hydraulic actuator pipeline; the pilot pump is connected with the hydraulic pump, and the reversing main valve is connected with a pilot pump pipeline; the electromagnetic valve is respectively connected with the pilot pump and the priority valve pipeline; the controller is connected with the electromagnetic valve, the operator is connected with the controller, the operator is configured to send a regulation signal to the controller, and the controller is configured to receive the regulation signal and regulate the opening and closing of the electromagnetic valve according to the regulation signal so as to regulate the opening and closing of the priority valve.

The embodiment of the utility model provides an in, provide power for the hydraulic pump by the engine, the hydraulic pump passes through the main oil circuit and is connected with hydraulic actuator, and the main oil circuit sets gradually priority valve and switching-over main valve to keeping away from the hydraulic pump near the hydraulic pump certainly, and simultaneously, the guide's pump of establishing ties on the hydraulic pump provides guide's pressure, and guide's pressure can promote the switching-over main valve switching-over, and priority valve opening and closing and the switching-over main valve switching-over all can communicate or cut off the main. During operation, if the hydraulic actuating mechanism needs to be started preferentially, the following steps are carried out: firstly, a pilot pressure provided by a pilot pump is used for pushing a reversing main valve to be reversed to conduct a main oil way, then, an operator sends a regulation signal to a controller, the controller receives the regulation signal and regulates the electromagnetic valve to be opened according to the regulation signal so as to regulate the priority valve to be opened, and when the priority valve is opened, hydraulic oil in the main oil way flows into a hydraulic actuator through the reversing main valve, so that the hydraulic actuator is driven to act; when the hydraulic actuator is required to stop operating, the pilot pump stops providing pilot pressure to the reversing main valve, the reversing main valve returns to the original position, the main oil path is cut off, and the hydraulic actuator stops operating.

In a plurality of optional embodiments of this embodiment, can the hydraulic drive portion of the arm hydro-cylinder of excavator or swing motor or other action structures as the actuating mechanism that surges, whether the available manipulator of this embodiment is the preferred action of the actuating mechanism that surges of artificial control, and this embodiment overall structure is simple and convenient easy to carry out, and is not high to the operation workman requirement, is favorable to practicing thrift the cost of labor, and can reduce the misoperation rate, improves engineering safety.

In a second aspect, the embodiment of the present invention provides an excavator hydraulic control system, which comprises the aforementioned self-defined action priority control hydraulic system, wherein the hydraulic actuator is a bucket rod cylinder or a rotary motor.

In a third aspect, an embodiment of the present invention provides another excavator hydraulic control system, where the excavator hydraulic control system includes the foregoing 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 reversing main valve includes a first reversing main valve and a second reversing main valve, and the electromagnetic valve includes a first electromagnetic valve and a second electromagnetic valve; the controller is configured to regulate the opening and closing of the first electromagnetic valve according to the regulation signal so as to regulate the opening and closing of the first priority valve, and regulate the opening and closing of the first electromagnetic valve according to the regulation signal so as to regulate the opening and closing of the first priority valve, wherein the first hydraulic actuator is one of the arm cylinder and the rotary motor, and the second hydraulic actuator is the other of the arm cylinder and the rotary motor.

Because the embodiment of the utility model provides an excavator hydraulic control system that second aspect and third aspect provided all include the self-defined action priority control hydraulic system that the first aspect provided, therefore, the utility model provides an excavator hydraulic control system that second aspect and third aspect provided all can reach all beneficial effects that self-defined action priority control hydraulic system that the first aspect provided can reach, it is right the utility model provides an other beneficial effects that excavator hydraulic control system that second aspect and third aspect provided can reach are seen in the description of the description embodiment mode part for details.

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 embodiments or the technical solutions in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of an optional implementation of a custom action priority control hydraulic system according to an embodiment of the present invention;

fig. 2 is a schematic overall structural diagram of another alternative implementation of the custom action priority control hydraulic system according to an embodiment of the present invention;

fig. 3 is a schematic view of an overall structure of a custom action priority control hydraulic system provided in the second embodiment of the present invention;

fig. 4 is an overall structural schematic diagram of an optional implementation of the excavator hydraulic control system according to the fifth embodiment of the present invention.

Icon: 100-an operator; 200-a controller; 300-hydraulic actuator; 310-a first hydraulic actuator; 320-a second hydraulic actuator; 410-a hydraulic pump; 420-a priority valve; 421-a first priority valve; 422-a second priority valve; 430-a reversing main valve; 431-a first reversing main valve; 432-a second reversing main valve; 440-a pilot pump; 450-electromagnetic valve; 451-first solenoid valve; 452-a second solenoid valve; 500-boom cylinder; 510-boom reversing main valve; 520-boom hydraulic pump; 600-engine.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "left", "right", "inside", "outside", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the utility model is conventionally placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example one

Referring to fig. 1 and 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 circuit includes a hydraulic pump 410, a priority valve 420, a switching 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 pipe, the priority valve 420 is connected to the direction-changing main valve 430 through an oil line, and the direction-changing main valve 430 is connected to the hydraulic actuator 300 through a pipe; the pilot pump 440 is connected to the hydraulic pump 410, and the switching main valve 430 is connected to the pilot pump 440 via a pilot oil line (a pilot oil line is not fully shown); the solenoid valve 450 is respectively connected with 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 send a control signal to the controller 200, and the controller 200 is configured to receive the control signal and control the opening and closing of the solenoid valve 450 and thus the priority valve 420 according to the control signal.

In this embodiment, the hydraulic pump 410 is powered by the engine 600 in fig. 1, the hydraulic pump 410 is connected to the hydraulic actuator 300 through a main oil passage, the main oil passage is provided with the priority valve 420 and the switching main valve 430 in order from the vicinity of the hydraulic pump 410 to the distance from the hydraulic pump 410, and the pilot pump 440 connected in series with the hydraulic pump 410 supplies the pilot pressure that can switch the switching main valve 430, and the opening and closing of the priority valve 420 and the switching of the switching main valve 430 can be communicated with or cut off the main oil passage. In operation, if the hydraulic actuator 300 is to be started preferentially, then: firstly, pilot pressure provided by a pilot pump 440 is used for pushing a reversing main valve 430 to reverse to conduct a main oil path, then, a regulating signal is sent to a controller 200 through an operator 100, the controller 200 regulates the opening of an electromagnetic valve 450 according to the regulating signal after receiving the regulating signal so as to regulate the opening of a priority valve 420, and when the priority valve 420 is opened, hydraulic oil in the main oil path flows into a hydraulic actuator 300 through the reversing main valve 430, so that the hydraulic actuator 300 is driven to act; when the hydraulic actuator 300 needs to be stopped, the pilot pump 440 stops supplying the pilot pressure to the switching main valve 430, the switching main valve 430 returns to the original position, the main oil passage is cut off, and the hydraulic actuator 300 stops operating.

In a plurality of optional embodiments of this embodiment, a hydraulic driving part of an arm cylinder or a swing motor of an excavator or other action structural members may be used as the hydraulic actuator 300, for example, referring to fig. 1, that is, the arm cylinder of the excavator is used as the hydraulic actuator 300, referring to fig. 2, the swing motor of the excavator is used as the hydraulic actuator 300, and the operator 100 may be used to manually control whether the hydraulic actuator 300 has a priority action.

In an optional implementation manner of this embodiment, it is preferable that the electromagnetic valve 450 is a proportional electromagnetic valve, and the controller 200 is configured to regulate the opening size of the proportional electromagnetic valve according to the regulation signal under a working condition that the proportional electromagnetic valve is opened, so as to regulate the opening size of the priority valve 420. With such a configuration, the flow rate of the hydraulic oil entering the switching 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 can enter the hydraulic actuator 300 from the main oil passage, thereby achieving the function of controlling the operation speed of the hydraulic actuator 300.

Further preferably, the operator 100 is a knob operator, and the knob operator has a plurality of selection levels, each selection level corresponds to one opening of the electromagnetic valve 450, so that the opening of the electromagnetic 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, and the knob operator has the advantages of simple operation selection and strong practicability.

Example two

Referring to fig. 3, the custom action priority control hydraulic system includes an operator 100, a controller 200, a hydraulic actuator 300, and a hydraulic oil path. Specifically, the hydraulic circuit includes a hydraulic pump 410, a priority valve 420, a switching 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 pipe, the priority valve 420 is connected to the direction-changing main valve 430 through an oil line, and the direction-changing main valve 430 is connected to the hydraulic actuator 300 through a pipe; the pilot pump 440 is connected to the hydraulic pump 410, and the switching main valve 430 is connected to the pilot pump 440 via a pilot oil line (a pilot oil line is not fully shown); the solenoid valve 450 is respectively connected with 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 send a control signal to the controller 200, and the controller 200 is configured to receive the control signal and control the opening and closing of the solenoid valve 450 and thus the priority valve 420 according to the control signal.

The above hydraulic actuator 300 includes the first hydraulic actuator 310 and the second hydraulic actuator 320, the priority valve 420 includes the first priority valve 421 and the second priority valve 422, the switching main valve 430 includes the first switching main valve 431 and the second switching main valve 432, and the solenoid valve 450 includes the first solenoid valve 451 and the second solenoid valve 452. The hydraulic pump 410 is connected with a first priority valve 421 through a pipeline, the first priority valve 421 is connected with a first reversing main valve 431 through an oil pipeline, and the first reversing main valve 431 is connected with the first hydraulic actuator 310 through a pipeline; the first switching main valve 431 is connected with the pilot pump 440 through a pipeline; the first solenoid valve 451 is connected to the pilot pump 440 and the first priority valve 421 through pipes; the controller 200 is configured to regulate the opening and closing of the first solenoid valve 451, and thus the opening and closing of the first priority valve 421, according to the regulation signal. The hydraulic pump 410 is further connected with a second priority valve 422 through a pipeline, the second priority valve 422 is connected with a second reversing main valve 432 through an oil way, and the second reversing main valve 432 is connected with the second hydraulic actuator 320 through a pipeline; the second switching main valve 432 is connected to the pilot pump 440 through a pipe; the second electromagnetic valve 452 is respectively connected with the pilot pump 440 and the second priority valve 422 through pipelines; the controller 200 is configured to regulate the opening and closing of the second solenoid 452, and thus the second priority valve 422, based on the regulation signal.

In this embodiment, the engine 600 in fig. 3 may be used to provide power to the hydraulic pump 410, the hydraulic pump 410 is connected to the first hydraulic actuator 310 through a first main oil path, a first priority valve 421 and a first direction-changing main valve 431 are sequentially disposed on the first main oil path from the position close to the hydraulic pump 410 to the position far from the hydraulic pump 410, and meanwhile, the pilot pump 440 connected in series with the hydraulic pump 410 may provide pilot pressure to the first direction-changing main valve 431, the pilot pressure may push the first direction-changing main valve 431 to change direction, and both the opening and closing of the first priority valve 421 and the direction-changing of the first direction-changing main valve 431 may be connected or disconnected from the first; the hydraulic pump 410 is also connected to the second hydraulic actuator 320 through a second main oil passage, a second priority valve 422 and a second direction-changing main valve 432 are sequentially provided on the second main oil passage from the vicinity of the hydraulic pump 410 to the distance from the hydraulic pump 410, and a pilot pump 440 connected in series with the hydraulic pump 410 is capable of supplying a pilot pressure to the second direction-changing main valve 432, the pilot pressure is capable of driving the second direction-changing main valve 432 to change direction, and the opening and closing of the second priority valve 422 and the direction-changing of the second direction-changing main valve 432 are capable of communicating or interrupting the second main oil passage.

In operation, if the first hydraulic actuator 310 is to be activated preferentially, then: firstly, a pilot pressure provided by a pilot pump 440 is used for pushing a first reversing main valve 431 to be reversed to conduct a first main oil path, then, a regulation signal is sent to a controller 200 through an operator 100, the controller 200 regulates the opening of a first electromagnetic valve 451 according to the regulation signal after receiving the regulation signal so as to regulate the opening of a first priority valve 421, and when the first priority valve 421 is opened, hydraulic oil in the first main oil path flows into a first hydraulic actuator 310 through the first reversing main valve 431, so that the first hydraulic actuator 310 is driven to act; when the first hydraulic actuator 310 needs to stop operating, the pilot pump 440 stops supplying the pilot pressure to the first switching main valve 431, and when the first switching main valve 431 returns to the original position, the first main oil path is cut off, so that the first hydraulic actuator 310 stops operating; if the second hydraulic actuator 320 is to be activated preferentially, then: firstly, the pilot pressure provided by the pilot pump 440 is used for pushing the second reversing main valve 432 to be reversed to conduct the second main oil path, then, the operator 100 sends a regulation signal to the controller 200, the controller 200 receives the regulation signal and then regulates the second electromagnetic valve 452 to be opened according to the regulation signal so as to regulate the second priority valve 422 to be opened, when the second priority valve 422 is opened, hydraulic oil in the second main oil path flows into the second hydraulic actuator 320 through the second reversing main valve 432, and therefore the second hydraulic actuator 320 is driven to act; when it is necessary to stop the operation of the second hydraulic actuator 320, the pilot pump 440 is stopped from supplying the pilot pressure to the second switching main valve 432, and when the second switching main valve 432 returns to the original position, the second main oil passage is cut off, and the operation of the second hydraulic actuator 320 is stopped; if it is necessary to start the first hydraulic actuator 310 and the second hydraulic actuator 320 at the same time in preference to other actuators, the first hydraulic actuator 310 and the second hydraulic actuator 320 may be started at the same time in the above manner, and the first main oil passage and the second main oil passage may be cut off at the same time or sequentially as needed when the first main oil passage and the second main oil passage are closed.

In a plurality of optional embodiments of this embodiment, one of the arm cylinder and the swing motor of the excavator may be used as the first hydraulic actuator 310, and the other of the arm cylinder and the swing motor of the excavator may be used as the second hydraulic actuator 320, for example, referring to fig. 3, that is, the arm cylinder of the excavator is used as the first hydraulic actuator 310, and the swing motor of the excavator is used as the second hydraulic actuator 320, in this embodiment, the operator 100 may be used to manually control whether the first hydraulic actuator 310 and the second hydraulic actuator 320 operate preferentially, and this embodiment has a simple and convenient overall structure, is easy to implement, has no high requirement on operators, is beneficial to saving labor cost, and can reduce operation failure rate and improve engineering safety.

Under more construction conditions of the present embodiment, it is preferable that the controller 200 is configured to: under the first working condition, the first electromagnetic valve 451 is controlled to be opened and the second electromagnetic valve 452 is controlled to be closed according to the control signal, so that the first priority valve 421 is controlled to be opened and the second priority valve 422 is controlled to be closed; and under the second working condition, the second electromagnetic valve 452 is controlled to be opened and the first electromagnetic valve 451 is controlled to be closed according to the control signal, so that the second priority valve 422 is controlled to be opened and the first priority valve 421 is controlled to be closed, and therefore the first hydraulic actuator 310 or the second hydraulic actuator 320 is selectively and preferentially started.

In the preferred embodiment, it is further preferred that the first solenoid valve 451 and the second solenoid valve 452 are proportional solenoid valves; the controller 200 is configured to: under the working condition that the first electromagnetic valve 451 is opened, the opening degree of the first electromagnetic valve 451 can be regulated according to the regulating signal, and then the opening degree of the first priority valve 421 can be regulated; or, under the condition that the second electromagnetic valve 452 is opened, the opening degree of the second electromagnetic valve 452 is regulated according to the regulation signal, and further the opening degree of the second priority valve 422 is regulated. With this configuration, the flow rate of the hydraulic oil that can enter the first hydraulic actuator 310 in the first main oil passage and the flow rate of the hydraulic oil that can enter the second hydraulic actuator 320 in the second main oil passage can be adjusted by controlling the opening degree of the first priority valve 421 or the second priority valve 422 to control the flow rate of the hydraulic oil that enters the first switching main valve 431 or the second switching main valve 432, thereby achieving the function of controlling the operating speeds of the first hydraulic actuator 310 and the second hydraulic actuator 320.

Further preferably, the operator 100 is a knob operator, and the knob operator has a first gear and a second gear, and the first gear and the second gear respectively have a plurality of selection levels; the first gear corresponds to the first electromagnetic valve 451 being opened and the second electromagnetic valve 452 being closed, and the second gear corresponds to the second electromagnetic valve 452 being opened and the first electromagnetic valve 451 being closed; each selection level corresponds to an opening degree of the solenoid valve 450 opened in the corresponding gear. Therefore, the gear can be correspondingly selected by rotating the knob on the knob operator to selectively control the selective actions of the first hydraulic actuator 310 and the second hydraulic actuator 320, and after one hydraulic actuator 300 is selected to act, the corresponding hydraulic actuator 300 is correspondingly rotated to a required level to change the opening degree of the corresponding electromagnetic valve 450, so that the action speed of the corresponding hydraulic actuator 300 is controlled, and the hydraulic actuator has the advantages of simple operation selection and strong practicability.

EXAMPLE III

The embodiment provides an excavator hydraulic control system, which comprises a custom action priority control hydraulic system provided in any one of optional implementation manners of the embodiment, wherein the hydraulic actuator 300 is an arm cylinder or a swing motor. Because the excavator hydraulic control system comprises the custom action priority control hydraulic system described in the first embodiment, the excavator hydraulic control system provided by the embodiment can achieve all the beneficial effects that the custom action priority control hydraulic system can achieve in the first embodiment, and the effects that the same structure in the first embodiment can achieve can be obtained by referring to various optional or preferred embodiments in the first embodiment.

Example four

The present embodiment provides another excavator hydraulic control system including the custom action priority control hydraulic system according to any one of the optional embodiments of the second embodiment, wherein the first hydraulic actuator 310 is one of an arm cylinder and a swing motor, and the second hydraulic actuator 320 is the other of the arm cylinder and the swing motor. Because the excavator hydraulic control system comprises the customized action priority control hydraulic system described in the second embodiment, the excavator hydraulic control system provided by the embodiment can achieve all the beneficial effects that the customized action priority control hydraulic system can achieve in the second embodiment, and the effects that the same structure in the embodiment as that in the second embodiment can achieve can be obtained by referring to various optional or preferred embodiments in the second embodiment.

EXAMPLE five

Referring to fig. 4, the excavator hydraulic control system further includes a boom cylinder 500, a boom reversing main valve 510, and a boom hydraulic pump 520, in addition to the excavator hydraulic control system provided in the third or fourth embodiment; boom hydraulic pump 520 and hydraulic pump 410 are connected in series with each other; the boom reversing main valve 510 is connected with the boom hydraulic pump 520 through a pipeline; the boom reversing main valve 510 is connected with the boom cylinder 500 through a pipeline; the boom switching main valve 510 and the pilot pump 440 are connected by a boom pilot oil line (a boom pilot oil line is not fully shown), wherein fig. 4 illustrates an example in which the boom cylinder 500, the boom switching main valve 510, and the boom hydraulic pump 520 are further provided in the excavator hydraulic control system according to the fourth embodiment, and a diagram in which the boom cylinder 500, the boom switching main valve 510, and the boom hydraulic pump 520 are further provided in the excavator hydraulic control system according to the third embodiment can be modified from fig. 4.

In this embodiment, the engine 600 simultaneously provides power to the hydraulic pump 410 and the boom hydraulic pump 520, and the pilot pressure provided by the pilot pump 440 can push the boom direction changing main valve 510 to change the direction to the oil path connecting the boom hydraulic pump 520 and the boom cylinder 500, so as to drive the boom cylinder 500 to operate, and the operation is performed simultaneously with the operation of the first hydraulic actuator 310 or the operation of the second hydraulic actuator 320, so as to complete the ground leveling operation and the swing loading operation of the excavator in cooperation with each other.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A self-defined action priority control hydraulic system is characterized by comprising an operator (100), a controller (200), a hydraulic actuator (300) and a hydraulic oil circuit;

the hydraulic oil circuit comprises a hydraulic pump (410), a priority valve (420), a reversing main valve (430), a pilot pump (440) and an electromagnetic valve (450);

the hydraulic pump (410) is in pipeline connection with the priority valve (420), the priority valve (420) is in oil-way connection with the reversing main valve (430), and the reversing main valve (430) is in pipeline connection with the hydraulic actuator (300);

the pilot pump (440) is connected with the hydraulic pump (410), and the reversing main valve (430) is in pipeline connection with the pilot pump (440); the electromagnetic valve (450) is respectively connected with the pilot pump (440) and the priority valve (420) through pipelines;

the controller (200) is connected with the electromagnetic valve (450), the operator (100) is connected with the controller (200), the operator (100) is configured to send a regulation signal to the controller (200), and the controller (200) is configured to receive the regulation signal and regulate the electromagnetic valve (450) to open and close according to the regulation signal so as to regulate the priority valve (420) to open and close.

2. The custom action priority control hydraulic system as claimed in claim 1, wherein the solenoid valve (450) is a proportional solenoid valve, and the controller (200) is configured to regulate the opening of the proportional solenoid valve according to the regulation signal under a condition that the proportional solenoid valve is opened, so as to regulate the opening of the priority valve (420).

3. The custom action priority control hydraulic system according to claim 2, characterized in that the operator (100) is a knob operator, and the knob operator has a plurality of selection levels, each of the selection levels corresponding to an opening size of the solenoid valve (450).

4. The custom action priority controlled hydraulic system according to claim 1, wherein the hydraulic actuator (300) comprises a first hydraulic actuator (310) and a second hydraulic actuator (320), the priority valve (420) comprises a first priority valve (421) and a second priority valve (422), the directional main valve (430) comprises a first directional main valve (431) and a second directional main valve (432), and the solenoid valve (450) comprises a first solenoid valve (451) and a second solenoid valve (452);

the hydraulic pump (410) is connected with the first priority valve (421) through a pipeline, the first priority valve (421) is connected with the first reversing main valve (431) through an oil way, and the first reversing main valve (431) is connected with the first hydraulic actuator (310) through a pipeline; the first reversing main valve (431) is connected with the pilot pump (440) through a pipeline; the first electromagnetic valve (451) is respectively connected with the pilot pump (440) and the first priority valve (421) through pipelines; the controller (200) is configured to regulate the first electromagnetic valve (451) to open and close according to the regulation signal, and further regulate the first priority valve (421) to open and close;

the hydraulic pump (410) is also connected with the second priority valve (422) in a pipeline way, the second priority valve (422) is connected with the second reversing main valve (432) in an oil way, and the second reversing main valve (432) is connected with the second hydraulic actuator (320) in a pipeline way; the second reversing main valve (432) is connected with the pilot pump (440) in a pipeline way; the second electromagnetic valve (452) is respectively connected with the pilot pump (440) and the second priority valve (422) through pipelines; the controller (200) is configured to regulate the second solenoid valve (452) to open and close according to the regulation signal, and further regulate the second priority valve (422) to open and close.

5. The custom action priority controlled hydraulic system according to claim 4, wherein the controller (200) is configured to:

under a first working condition, the first electromagnetic valve (451) is controlled to be opened and the second electromagnetic valve (452) is controlled to be closed according to the control signal, and then the first priority valve (421) is controlled to be opened and the second priority valve (422) is controlled to be closed; and under a second working condition, the opening of the second electromagnetic valve (452) and the closing of the first electromagnetic valve (451) are regulated and controlled according to the regulation and control signal, and then the opening of the second priority valve (422) and the closing of the first priority valve (421) are regulated and controlled.

6. The custom action priority control hydraulic system according to claim 5, characterized in that the first solenoid valve (451) and the second solenoid valve (452) are proportional solenoid valves;

the controller (200) is configured to: under the working condition that the first electromagnetic valve (451) is opened, the opening degree of the first electromagnetic valve (451) can be regulated and controlled according to the regulating and controlling signal, and then the opening degree of the first priority valve (421) can be regulated and controlled; or under the working condition that the second electromagnetic valve (452) is opened, the opening degree of the second electromagnetic valve (452) is regulated and controlled according to the regulating and controlling signal, and then the opening degree of the second priority valve (422) is regulated and controlled.

7. The custom action priority control hydraulic system according to claim 6, characterized in that the operator (100) is a knob operator, and the knob operator has a first gear and a second gear, and the first gear and the second gear respectively have a plurality of selection levels;

the first gear corresponds to the opening of the first electromagnetic valve (451) and the closing of the second electromagnetic valve (452), and the second gear corresponds to the opening of the second electromagnetic valve (452) and the closing of the first electromagnetic valve (451); each of the selection levels corresponds to an opening degree of the solenoid valve (450) opened in the corresponding gear.

8. The hydraulic control system of the excavator is characterized by comprising the self-defined action priority control hydraulic system of any one of claims 1 to 3, and the hydraulic actuator (300) is an arm cylinder or a rotary motor.

9. A hydraulic control system for an excavator, comprising the hydraulic system for custom action priority control according to any one of claims 4 to 7, wherein the first hydraulic actuator (310) is one of an arm cylinder and a swing motor, and the second hydraulic actuator (320) is the other of the arm cylinder and the swing motor.

10. The excavator hydraulic control system according to claim 8 or 9, further comprising a boom cylinder (500), a boom reversing main valve (510), and a boom hydraulic pump (520);

the boom hydraulic pump (520) and the hydraulic pump (410) are connected in series with each other; the boom reversing main valve (510) is connected with the boom hydraulic pump (520) through a pipeline; the boom reversing main valve (510) is connected with the boom cylinder (500) through a pipeline; the boom reversing main valve (510) is connected with the pilot pump (440) through a pipeline.