Multi-way valve control system and engineering machinery

Abstract

The present application provides a multi-way valve control system and engineering machinery. The system includes: a variable pump that provides power for the multi-way valve control system; a first multi-way valve, the oil inlet of the first multi-way valve and the feedback oil port of the feedback oil circuit of the first multi-way valve being respectively connected to the variable pump, the first multi-way valve being used to transmit the power of the variable pump to a second multi-way valve connected to the first multi-way valve; an analog detection controller, the first end and the second end of the analog detection controller being respectively connected to the first multi-way valve and the second multi-way valve, and being used to feed back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve; and a second multi-way valve being connected to the analog detection controller and a first actuator, and being used to transmit the received hydraulic oil to the first actuator.

Description

Technical Field

[0001] The present application relates to the field of engineering machinery, and in particular to a multi-way valve control system and engineering machinery. Background Art

[0002] Multi-way valves are hydraulic control valves used in construction machinery, consisting of a header, several intermediate links, and a tail link. Their compact structure makes them widely used in the field. The multi-way valve is powered by a hydraulic pump, while the intermediate link is the working link, connecting to the actuator and controlling its movement.

[0003] Current multi-way valve control systems often utilize an integrated multi-way valve structure, with multiple working units connected in parallel. These systems include an LS load-sensing oil circuit and a variable displacement pump. The variable displacement pump outputs hydraulic oil at varying flow rates and pressures based on feedback from the LS load-sensing oil circuit. To meet the varying flow and pressure requirements of various actuators, existing multi-way valve control systems often employ multiple pumps or flow distributors to provide varying flow and pressure inputs to different actuators. This results in a bulky and complex multi-way valve system, making it susceptible to leakage and valve core sticking. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a multi-way valve control system and engineering machinery.

[0005] In order to achieve the above objectives, the present application provides a first aspect of a multi-way valve control system, comprising:

[0006] Variable displacement pump, providing power for the multi-way valve control system;

[0007] a first multi-way valve, wherein the oil inlet of the first multi-way valve and the feedback oil port of the feedback oil circuit are respectively connected to the variable pump, and the first multi-way valve is used to transmit power of the variable pump to the second multi-way valve connected to the first multi-way valve;

[0008] an analog detection controller, wherein the first end and the second end of the analog detection controller are respectively connected to the first multi-way valve and the second multi-way valve, and are used to feed back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve, so as to send a corresponding feedback signal to the variable pump through the feedback oil port, and after the variable pump adjusts the power according to the feedback signal, control the hydraulic oil pressure and flow of the second multi-way valve according to the adjusted power;

[0009] The second multi-way valve is connected to the analog detection controller and the first actuator, and is used to transmit the received hydraulic oil to the first actuator.

[0010] In the embodiment of the present application, there are multiple second multi-way valves and multiple analog detection controllers, wherein each analog detection controller is connected to a corresponding second multi-way valve.

[0011] In an embodiment of the present application, the first multi-way valve includes: an inter-valve control link, connected to the analog detection controller, for transmitting the power of the variable pump to the second multi-way valve and receiving the feedback signal sent by the analog detection controller; a first type of working link, connected to the second actuator, for transmitting the power of the variable pump to the second actuator and controlling the operation of the second actuator.

[0012] In an embodiment of the present application, the first type of working link includes a first main valve and a first pressure compensating valve; the first pressure compensating valve is located between the first main valve and the second actuator, and is used to keep the pressure difference between the inlet and outlet of the second actuator within a preset pressure range.

[0013] In an embodiment of the present application, the second multi-way valve includes: a second type of working link, connected to the first actuator, for transmitting the received hydraulic oil to the first actuator and controlling the operation of the first actuator.

[0014] In an embodiment of the present application, the second type of working link includes a second main valve and a second pressure compensating valve; the second pressure compensating valve is located between the analog detection controller and the second main valve, and is used to keep the pressure difference between the inlet and outlet of the first actuator within a preset pressure range.

[0015] In an embodiment of the present application, the multi-way valve control system also includes a compensator, which is connected to the variable pump and the feedback oil port, and is used to determine the required pressure and required flow of the multi-way valve control system based on the feedback signal of the feedback oil port, so that the variable pump outputs the required pressure and required flow.

[0016] In an embodiment of the present application, when it is determined that all actuators are in a stopped state, the compensator controls the variable pump to maintain a standby state according to the feedback signal sent by the feedback oil port, and outputs a preset pressure and a preset flow; when it is determined that all actuators are switched from a stopped state to a working state, the compensator controls the variable pump to increase the output pressure and / or increase the output flow accordingly according to the feedback signal sent by the feedback oil port.

[0017] In an embodiment of the present application, the first multi-way valve also includes: a first protection link, connected in parallel with the first type of working link, for preventing the hydraulic oil pressure flowing through the first multi-way valve from being too high; and / or the second multi-way valve also includes: a second protection link, connected in parallel with the second type of working link, for preventing the hydraulic oil pressure flowing through the second multi-way valve from being too high.

[0018] In a second aspect of the present application, an engineering machine is provided, comprising the above-mentioned multi-way valve control system.

[0019] By employing this multi-way valve control system, the entire multi-way valve control system is divided into multiple multi-way valves, allowing for better allocation of the internal space structure of the construction machinery. Furthermore, by dividing a single multi-way valve into multiple multi-way valves, each multi-way valve is smaller and simpler in structure, making leakage and valve core sticking issues easier to address during the design phase.

[0020] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present application but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0022] Figure 1 The following schematically shows a structural block diagram of a multi-way valve control system according to an embodiment of the present application;

[0023] Figure 2 The following schematically shows a structural block diagram of a multi-way valve control system according to another embodiment of the present application;

[0024] Figure 3 The schematic diagram of the multi-way valve control system according to the embodiment of the present application is shown;

[0025] Figure 4 Schematically shows a first partial enlarged view of the principle diagram of the multi-way valve control system according to an embodiment of the present application;

[0026] Figure 5 Schematically shows a second partial enlarged view of the principle diagram of the multi-way valve control system according to an embodiment of the present application;

[0027] Figure 6 A third partial enlarged diagram of the principle diagram of the multi-way valve control system according to an embodiment of the present application is schematically shown.

[0028] Reference numerals

[0029] F1-1 First working group F1-2 Second working group

[0030] F1-3 Third working joint P1 First oil inlet line

[0031] T1 First oil outlet line LS1 First feedback oil line

[0032] A1 The first working port of the first working joint B1 The second working port of the first working joint

[0033] F2-1 Fourth Working Group F2-2 Fifth Working Group

[0034] F2-3 Sixth working joint P2 Second oil inlet line

[0035] T2 Second oil outlet line LS2 Second feedback oil line

[0036] Z2-1 Seventh Working Group Z2-2 Eighth Working Group

[0037] Z2-3 Ninth working joint P3 third oil inlet line

[0038] T3 third oil outlet line LS3 third feedback oil line DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] Figure 1 The multi-way valve control system 100 of the embodiment of the present application is schematically shown. Figure 1 As shown, in one embodiment of the present application, a multi-way valve control system 100 is provided, and the multi-way valve control system 100 includes:

[0041] The variable displacement pump 101 provides power for the multi-way valve control system 100;

[0042] A first multi-way valve 102, wherein the oil inlet of the first multi-way valve 102 and the feedback oil port of the feedback oil circuit are respectively connected to the variable pump 101, and the first multi-way valve 102 is used to transmit the power of the variable pump 101 to the second multi-way valve 104 connected to the first multi-way valve;

[0043] An analog detection controller 103, wherein a first end and a second end of the analog detection controller 103 are respectively connected to the first multi-way valve 102 and the second multi-way valve 104, and is used to feed back the detected hydraulic oil pressure and flow of the second multi-way valve 104 to the first multi-way valve 102, so as to send a corresponding feedback signal to the variable pump 101 through the feedback oil port. After the variable pump 101 adjusts the power according to the feedback signal, the hydraulic oil pressure and flow of the second multi-way valve 104 are controlled according to the adjusted power;

[0044] The second multi-way valve 104 is connected to the analog detection controller 103 and the first actuator, and is used to transmit the received hydraulic oil to the first actuator.

[0045] A variable pump is a device that can deliver hydraulic oil at varying pressures and flows to a hydraulic system based on feedback from a feedback circuit. A multiway valve consists of multiple main valves connected in parallel, used to control the movement of an actuator. An analog detection controller can obtain the pressure and flow of the multiway valve connected to it and feed this pressure and flow back to the first multiway valve, which then transmits the signal to the variable pump. An actuator is a mechanism that converts the hydraulic energy of hydraulic oil into mechanical energy. Common actuators in hydraulic systems include cylinders and motors. The first actuator is the one connected to the second multiway valve. The first multiway valve is directly connected to the variable pump, while the second multiway valve is indirectly connected to the variable pump. Hydraulic oil flowing into the second multiway valve first passes through the first valve before flowing into the second valve. The first and second multiway valves are connected in series, and the hydraulic oil pressure flowing into the first valve is greater than that of the second valve.

[0046] In the multi-way valve control system of the present application, multiple actuators are connected to the main valve of the first multi-way valve or the second multi-way valve. During the movement of the actuator, hydraulic oil with different pressures and flows is required. The pressure and flow requirements will be fed back to the variable plunger pump through the feedback oil circuit. The variable plunger pump confirms the pressure and flow required by the actuator based on the feedback signal. The analog detection controller is connected to the second multi-way valve and the first multi-way valve, and obtains the pressure and flow of the second multi-way valve in real time. The analog detection controller feeds back to the feedback oil circuit based on the current flow and pressure values. The analog detection controller controls the flow input to the second multi-way valve based on the adjusted flow. The main valve in the second multi-way valve delivers the received hydraulic oil to the first actuator, thereby controlling the movement of the first actuator. After receiving the signal from the feedback oil circuit, the variable pump in the present application controls the output flow according to the feedback pressure to ensure that the multi-way valve control system can operate stably.

[0047] In a specific embodiment, the lifting cylinder and the boom cylinder are two actuators of the engineering machinery and are controlled by a multi-way valve control system. Specifically, the lifting cylinder is controlled by the first multi-way valve of the multi-way valve control system, and the boom cylinder is controlled by the second multi-way valve of the multi-way valve control system. When both the lifting cylinder and the boom cylinder are in motion, the analog detection controller detects the flow and pressure of the second multi-way valve and transmits the flow and pressure signals to the feedback oil circuit inside the first multi-way valve. The flow and pressure flowing into the lifting cylinder are directly fed back to the feedback oil circuit. The variable pump outputs a specific flow rate based on the pressure value fed back to ensure stable operation of both the lifting cylinder and the boom cylinder.

[0048] By employing this multi-way valve control system, the entire multi-way valve control system is divided into multiple multi-way valves, allowing for better allocation of the internal space structure of the construction machinery. Furthermore, by dividing a single multi-way valve into multiple multi-way valves, each multi-way valve is smaller and simpler in structure, making leakage and valve core sticking issues easier to address during the design phase.

[0049] In one embodiment, there are multiple second multi-way valves and multiple analog detection controllers, wherein each analog detection controller is connected to a corresponding second multi-way valve. For example, if there are three second multi-way valves, then there are also three analog detection controllers. The second multi-way valve control module is composed of the second multi-way valve and the analog detection controller. In the case where the second multi-way valve is a multi-stage second multi-way valve, each stage of the multi-way valve is connected in series with an analog detection controller to form the second multi-way valve control unit of that stage, and the second multi-way valve control units of each stage are connected in parallel to form the second multi-way valve control module.

[0050] In a specific embodiment, Figure 2 As shown, a multi-way valve control system 200 is provided, including a variable pump 101, a first multi-way valve 102, a first-stage second multi-way valve 103A, a second-stage second multi-way valve 103B, a first analog detection controller 104A, and a second analog detection controller 104B. The first analog detection controller 104A and the second analog detection controller 104B feed back the flow and pressure of the multi-way valve of this stage to the feedback oil circuit of the first multi-way valve 102. The variable pump 101 adjusts the output flow according to the pressure of the feedback oil circuit. The first analog detection controller 104A and the second analog detection controller 104B control the flow and pressure of the second multi-way valve of this stage according to the detected flow and pressure. In the embodiment of the present application, two second multi-way valves are included, but specific embodiments can include three, four, or more. The two second multi-way valves in the embodiment are not used to limit the present application.

[0051] In one embodiment, a first multi-way valve includes: an inter-valve control link connected to an analog detection controller, configured to transmit power from a variable displacement pump to a second multi-way valve and receive feedback signals from the analog detection controller; and a first-type working link connected to a second actuator, configured to transmit power from the variable displacement pump to the second actuator and control the operation of the second actuator. The power from the variable displacement pump is transmitted to hydraulic oil, which, after passing through the variable displacement pump, becomes high-pressure hydraulic oil, which can drive the actuator to operate. The analog detection controller is connected to the inter-valve control link, receives the hydraulic oil transmitted by the inter-valve control link, and controls the flow and pressure of the second multi-way valve based on the pressure and flow of the hydraulic oil in the inter-valve control link and the pressure and flow of the second multi-way valve. The feedback signal from the analog detection controller is the pressure and flow of the hydraulic oil in the second multi-way valve. The first-type working link is connected to the second actuator, where there may be multiple second actuators and the first-type working link. The first-type working link controls the second actuator to perform corresponding operations.

[0052] In one embodiment, a first type of working joint includes a first main valve and a first pressure compensating valve. The first pressure compensating valve is located between the first main valve and the second actuator and is used to maintain the pressure differential between the inlet and outlet of the second actuator within a preset pressure range. The pressure compensating valve is used to maintain the inlet and outlet pressures of the actuator within a preset range despite changes in external pressure. The main valve is a multi-position reversing valve that controls the flow of hydraulic oil into and out of the actuator, thereby controlling the operation of the actuator. The second actuator is the actuator connected to the first multi-way valve. The first type of working joint utilizes post-valve compensation. The first pressure compensating valve is located between the first main valve and the second actuator. When external pressure is high, it reduces the pressure differential of the hydraulic oil flowing into the inlet and outlet of the first actuator. When external pressure is low, it compensates the pressure flowing into the actuator inlet, maintaining the pressure differential within the preset range. The first type of working joint utilizes post-valve compensation. Hydraulic oil first passes through the main valve and then the compensating valve before entering the actuator. This ensures that the pressure differential within the actuator remains within a preset range despite changes in the oil inlet pressure of the first multi-way valve. This post-valve compensation method provides more precise pressure compensation.

[0053] In one embodiment, the second multi-way valve includes a second-type working link connected to the first actuator, configured to transfer received hydraulic oil to the first actuator and control the operation of the first actuator. The second multi-way valve includes at least one second-type working link connected to the first actuator to control the operation of the first actuator. The number of second-type working links is the same as the number of first actuators, at least one, and each second-type working link controls one first actuator.

[0054] In one embodiment, the second type of working link includes a second main valve and a second pressure-compensating valve. The second pressure-compensating valve is located between the analog detection controller and the second main valve and is used to maintain the pressure differential between the inlet and outlet of the first actuator within a preset pressure range. The second type of working link utilizes pre-valve compensation for pressure compensation. Hydraulic oil entering the second type of working link first passes through the compensation valve for pressure compensation before passing through the main valve and the actuator, maintaining the inlet and outlet pressure differential within a preset range. This pre-valve compensation approach allows the second type of working link to respond more quickly during pressure compensation.

[0055] In one embodiment, the multi-way valve control system further includes a compensator connected to the variable displacement pump and a feedback port. The compensator is configured to determine a required pressure and flow rate of the multi-way valve control system based on a feedback signal from the feedback port, thereby causing the variable displacement pump to output the required pressure and flow rate. The compensator is connected to the feedback port of the multi-way valve control system. Based on the feedback signal from the feedback port, the compensator determines the required pressure value of the multi-way valve control system. The compensator adjusts the opening of the variable displacement pump, causing the variable displacement pump to adjust its output flow rate according to the control of the compensator.

[0056] In one specific embodiment, the feedback circuit is an LS circuit, and the variable displacement pump is a variable displacement piston pump. The LS circuit primarily senses the actuator's status and provides feedback to a compensator connected to the variable displacement pump to adjust the pump's output flow rate. The variable displacement piston pump is connected to the compensator, which determines the variable displacement piston pump's output flow rate based on feedback from the LS circuit. This ensures stable operation of the multi-way valve control system, precisely controls output flow, saves energy, and improves efficiency.

[0057] In one embodiment, when it is determined that all actuators are in a stopped state, the compensator controls the variable pump to maintain a standby state based on the feedback signal sent from the feedback oil port, and outputs a preset pressure and a preset flow rate. When it is determined that all actuators have switched from a stopped state to an active state, the compensator controls the variable pump to increase the output pressure and / or increase the output flow rate accordingly based on the feedback signal sent from the feedback oil port. When all actuators connected to the multi-way valve control system are in a stopped state, the compensator connected to the variable pump receives the feedback signal from the feedback oil port and controls the variable pump to be in a standby state. The standby state refers to outputting a small amount of hydraulic oil, causing the multi-way valve control system to enter a low-pressure waiting state. When the actuator enters an active state from a stopped state, the compensator increases the output pressure and / or increases the output flow rate based on the feedback signal.

[0058] In one embodiment, the first multi-way valve further includes: a first protection link, connected in parallel with the first type of working link, for preventing excessive pressure from the hydraulic oil flowing through the first multi-way valve; and / or the second multi-way valve further includes: a second protection link, connected in parallel with the second type of working link, for preventing excessive pressure from the hydraulic oil flowing through the second multi-way valve. When there are multiple second multi-way valves, there are also multiple second protection links. For example, if the second multi-way valve is a four-stage second multi-way valve, there are four corresponding second protection links. Each of the four-stage second multi-way valves is connected in parallel with a second protection link. Both the first and second multi-way valves include protection links, each containing an overflow valve. If the pressure flowing into the first and / or second multi-way valves is excessive, the hydraulic oil overflows to protect the pressure-bearing components within the first and second multi-way valves, including the valve body, valve core, and transmission lines between the valves.

[0059] In one embodiment, an engineering machine is provided, which includes the multi-way valve control system described above.

[0060] In a specific embodiment, Figure 3The multi-way valve control system shown includes a variable displacement pump connected to a hydraulic oil tank. The variable displacement pump is also connected to a first multi-way valve and a compensator. The compensator controls the output hydraulic oil flow of the variable displacement pump. The first multi-way valve includes a first protection link, a first inter-valve control link, a second inter-valve control link, and a first working link (F1-1), a second working link (F1-2), and a third working link (F1-3). The first multi-way valve internally includes a first oil inlet circuit (P1), a first oil outlet circuit (T1), and a first feedback circuit (LS1). The first protection link includes a relief valve connected between the first oil inlet circuit (P1) and the first oil outlet circuit (T1). It is used to protect the pressurized components within the first multi-way valve and to overflow hydraulic oil to reduce pressure if the pressure exceeds a preset value. The first inter-valve control link is connected to a first analog detection controller, and the second inter-valve control link is connected to a second analog detection controller. They are used to transfer hydraulic oil from the variable displacement pump to the analog detection controller to transmit power to the second multi-way valve. The first multi-way valve includes three working links, wherein the first working port (A1) and the second working port (B1) of the first working link (F1-1) are respectively connected to the two working oil ports of the actuator. In this embodiment, the second multi-way valve includes a first-stage second multi-way valve and a second-stage second multi-way valve, which are respectively connected to the first analog detection controller and the second analog detection controller. Each stage of the second multi-way valve includes a protection link and multiple working links. In this embodiment, the first-stage second multi-way valve includes a second protection link, a fourth working link (F2-1), a fifth working link (F2-2), and a sixth working link (F2-3). The first-stage second multi-way valve internally includes a second oil inlet circuit (P2), a second oil outlet circuit (T2), and a second feedback circuit (LS2). The second-stage second multi-way valve includes a third protection link, a seventh working link (Z2-1), an eighth working link (Z2-2) and a ninth working link (Z2-3), and the second-stage second multi-way valve internally includes a third oil inlet circuit (P3), a third oil outlet circuit (T3) and a third feedback circuit (LS3).

[0061] By employing the aforementioned multi-way valve control system, the entire multi-way valve control system is divided into multiple multi-way valves, allowing the internal space structure of the construction machinery to be better allocated. Furthermore, by dividing a single multi-way valve into multiple multi-way valves, each multi-way valve is smaller and simpler in structure, making leakage and valve core sticking issues easier to address during the design phase. By adjusting the output flow of the variable pump in real time based on the flow and pressure requirements of the multi-way valves, the energy efficiency of the variable pump is significantly improved. By employing a control system with multiple multi-way valves, when a fault such as leakage or valve core sticking occurs in the multi-way valve control system, only the multi-way valve at the fault location needs to be inspected, significantly reducing the workload compared to disassembling and repairing the entire multi-way valve system. Connecting actuators with high pressure requirements to the first multi-way valve and actuators with low pressure requirements to the second multi-way valve avoids the need for all working connections to be connected to high-pressure hydraulic oil, thereby reducing the risk of failure.

[0062] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0064] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0065] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A multi-way valve control system, characterized in that: include: A variable displacement pump, providing power for the multi-way valve control system; a first multi-way valve, wherein an oil inlet of the first multi-way valve and a feedback oil port of the feedback oil circuit are respectively connected to the variable pump, the first multi-way valve is connected in series with a second multi-way valve, and the first multi-way valve is used to transmit power from the variable pump to the second multi-way valve connected to the first multi-way valve; an analog quantity detection controller, wherein a first end and a second end of the analog quantity detection controller are respectively connected to the first multi-way valve and the second multi-way valve, and is configured to feed back the detected hydraulic oil pressure and flow of the second multi-way valve to the first multi-way valve, so as to send a corresponding feedback signal to the variable pump through the feedback oil port, and after the variable pump adjusts power according to the feedback signal, control the hydraulic oil pressure and flow of the second multi-way valve according to the adjusted power; The second multi-way valve is connected to the analog detection controller and the first actuator, and is used to transmit the received hydraulic oil to the first actuator; A compensator, the compensator is connected to the variable pump and the feedback oil port, and is used to determine the required pressure and required flow of the multi-way valve control system based on the feedback signal of the feedback oil port, so that the variable pump outputs the required pressure and the required flow; when it is determined that all the actuators are in a stopped working state, the compensator controls the variable pump to maintain a standby state according to the feedback signal sent by the feedback oil port, and outputs a preset pressure and outputs a preset flow; when it is determined that all the actuators are switched from the stopped working state to the working state, the compensator controls the variable pump to increase the output pressure and / or increase the output flow accordingly according to the feedback signal sent by the feedback oil port.

2. The multi-way valve control system according to claim 1, characterized in that: There are multiple second multi-way valves and multiple analog detection controllers, and each analog detection controller is connected to a corresponding second multi-way valve.

3. The multi-way valve control system according to claim 1, characterized in that: The first multi-way valve comprises: an inter-valve control link connected to the analog detection controller, for transmitting the power of the variable pump to the second multi-way valve and receiving a feedback signal sent by the analog detection controller; The first type of working link is connected to the second actuator, and is used to transmit the power of the variable pump to the second actuator and control the operation of the second actuator.

4. The multi-way valve control system according to claim 3, characterized in that: The first type of working link includes a first main valve and a first pressure compensation valve; The first pressure compensating valve is located between the first main valve and the second actuator, and is used to maintain the pressure difference between the inlet and outlet of the second actuator within a preset pressure range.

5. The multi-way valve control system according to claim 1, characterized in that: The second multi-way valve comprises: The second type of working link is connected to the first actuator, and is used to transmit the received hydraulic oil to the first actuator and control the operation of the first actuator.

6. The multi-way valve control system according to claim 5, characterized in that: The second type of working link includes a second main valve and a second pressure compensating valve; The second pressure compensation valve is located between the analog detection controller and the second main valve, and is used to keep the pressure difference between the inlet and outlet of the first actuator within a preset pressure range.

7. The multi-way valve control system according to claim 1, characterized in that: The first multi-way valve further includes: a first protection link connected in parallel with the first type of working link, for preventing the hydraulic oil pressure flowing through the first multi-way valve from being too high; and / or The second multi-way valve further includes: a second protection link connected in parallel with the second type of working link, and configured to prevent the hydraulic oil pressure flowing through the second multi-way valve from being too high.

8. An engineering machine, characterized in that: It comprises the multi-way valve control system according to any one of claims 1 to 7.

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