Hydraulic integrated valve block and its control method

Abstract

This invention discloses a hydraulic integrated valve block and its control method. By setting intersecting flow channels on the valve block, the supplied pressure oil is output in multiple pressure stages, and the multiple pressure stages are set independently. The overflow oil source of the previous stage is used as the pressure oil source of the next stage. A three-way solenoid valve is used to independently and continuously regulate the output of the high-pressure oil at the front end. Then, the pressure sensor is set to monitor the pressure of each oil port in real time and feed it back to the control system. The control system adjusts the control parameters of the pressure oil source and the three-way solenoid valve according to the feedback value, thereby obtaining the optimal system control characteristics.

Description

Technical Field

[0001] This invention relates to the field of hydraulic transmission control, and more particularly to hydraulic circuit control for multi-stage pressure output. Background Technology

[0002] Traditional hydraulic valve blocks rely on a single pressure oil source, resulting in high-pressure overflow back to the tank after each use, leading to significant energy waste. This wasted energy is entirely used for heat generation, causing the system to overheat and requiring cooling equipment, further wasting energy. Furthermore, traditional valve blocks have a single inlet channel, preventing effective multi-mode oil distribution to meet the system's maximum flow requirements. The single outlet of traditional valve blocks necessitates external oil distributors when there are multiple actuators, leading to back pressure due to throttling and energy waste, and poor response characteristics to actuator control. Additionally, the pressure fluctuation at the inlet of the three-way valve in traditional valve blocks varies considerably with system changes, affecting the stability of the output pressure. Therefore, there is an urgent need for a hydraulic integrated valve block and corresponding control methods to solve these problems. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a hydraulic integrated valve block and its control method to solve the problems in the background art.

[0004] The technical problem solved by this invention is achieved by the following technical solution:

[0005] The hydraulic integrated valve block is a polyhedron, mainly composed of a first surface, a second surface, a third surface, a fourth surface, and a fifth surface. The second surface, the third surface, the fourth surface, and the fifth surface are perpendicular to the first surface, the second surface is parallel to the fourth surface, and the third surface and the fifth surface are perpendicular to the fourth surface. The first surface is provided with a first pressure cavity, a first oil outlet cavity, a second pressure cavity, a third pressure cavity, a first two-way cavity, a first oil inlet cavity, and a three-way cavity.

[0006] The second surface is provided with fastening holes and a first oil return cavity;

[0007] The third surface is provided with a second oil return cavity, a second oil outlet cavity, and a second oil inlet cavity;

[0008] The fourth surface is provided with a countersunk hole, a third oil return cavity, a third oil outlet cavity, and a fourth oil outlet cavity;

[0009] The fifth surface is provided with a second two-way cavity.

[0010] The control method of the hydraulic integrated valve block is as follows: pressurized oil enters the valve block from the first oil inlet cavity and the second oil inlet cavity. A portion of the pressurized oil is delivered to the three-way cavity. After passing through the three-way solenoid valve, the oil is output from the third oil outlet cavity to control the actuator. The pressure sensor in the third pressure cavity provides feedback on the pressure of the pressurized oil output from the three-way solenoid valve. The control system controls the three-way solenoid valve to change the output pressure according to the feedback pressure to suit the needs of the actuator. The pressurized oil returning through the three-way solenoid valve enters the first return oil cavity and the second return oil cavity for return oil.

[0011] Another portion of the pressurized oil is delivered to the second two-way cavity, and after overflowing through the overflow valve, it is delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, the third oil return cavity, and the first two-way cavity. The pressurized oil delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, and the third oil return cavity is delivered to the actuator. The pressurized oil delivered to the first two-way cavity overflows through the overflow valve and is then delivered to the second oil return cavity and the first oil return cavity.

[0012] The pressure of the oil inlet channel of the three-way cavity is adjusted by the overflow valve installed in the second two-way cavity, and monitored and fed back to the control system by the pressure sensor installed in the first pressure cavity. The control system controls the pumping oil volume to the first oil inlet cavity and the second oil inlet cavity according to the feedback pressure. The pressure of the pressure oil delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, and the third return oil cavity is adjusted by the overflow valve installed in the first two-way cavity, and monitored and fed back to the control system by the pressure sensor installed in the second pressure cavity, thereby judging the operating status of the hydraulic system.

[0013] In this invention, the first pressure cavity, the second pressure cavity, and the third pressure cavity each include a connecting part and a flow channel. The connecting part is provided with a pressure sensor, which monitors the pressure of the hydraulic oil from the flow channel. When there is no pressure monitoring in the pressure cavity, a screw plug is provided in the connecting part of the pressure cavity to seal the pressure cavity.

[0014] The first oil outlet cavity, the second oil outlet cavity, the third oil outlet cavity, and the fourth oil outlet cavity each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to be output. When there is no external actuator in the oil outlet cavity, a screw plug is provided in the connecting part of the oil outlet cavity to seal the oil outlet cavity.

[0015] The first two-way cavity and the second two-way cavity each include a connecting part, a receiving cavity, an oil inlet channel, and an oil return channel. A two-way relief valve is installed in the receiving cavity. The relief valve is fixedly connected to the valve body through the connecting part. Pressure oil enters the relief valve through the oil inlet channel. When the pressure of the pressure oil is greater than the set pressure of the relief valve, the relief valve opens to overflow. The overflowed oil is output through the oil return channel. When the system does not use pressure-building overflow flow, a screw plug is installed at the connecting part of the two-way cavity to seal the two-way cavity. Pressure oil enters the receiving cavity through the oil inlet channel and then enters the oil return channel.

[0016] The first oil inlet cavity and the second oil inlet cavity each include a connecting part and a flow channel. The connecting part is provided with a pressure oil source, which is a pump station or an energy storage device. The pressure oil is input into the valve body through the flow channel.

[0017] The first return oil cavity, the second return oil cavity, and the third return oil cavity each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to output return oil. When the return oil cavity has no external output, a screw plug is provided at the connecting part of the return oil cavity to seal the return oil cavity.

[0018] The fastening hole and the countersunk hole are coaxial and connected. The valve block is installed on the main unit by a screw set in the fastening hole. The head of the screw is located in the countersunk hole and does not protrude from the valve block surface.

[0019] In this invention, the three-way cavity includes a connecting part, an oil inlet channel, an oil outlet channel, a return oil channel, and a sealing strip. A three-way electrically controlled valve is installed inside the three-way cavity. A sealing element is provided between the valve body of the three-way electrically controlled valve and the sealing strip to separate the oil inlet channel and the oil outlet channel, and to separate the oil outlet channel and the return oil channel. The three-way electrically controlled valve is fixedly connected to the valve body through the connecting part. The P port of the three-way electrically controlled valve is located in the oil inlet channel, the A port of the three-way electrically controlled valve is located in the oil outlet channel, and the T port of the three-way electrically controlled valve is located in the return oil channel. The three-way electrically controlled valve controls the pressure oil in the oil inlet channel to flow in through the P port and then flow out through the A port to enter the oil outlet channel for output. The return oil in the oil outlet channel can flow back through the A port of the three-way electrically controlled valve and then flow out through the T port to enter the return oil channel. The three-way electrically controlled valve can change the output pressure of the A port.

[0020] In this invention, the second oil inlet cavity is connected to the first oil inlet cavity and the three-way cavity, the second oil inlet cavity is connected to the second two-way cavity, the second two-way cavity is connected to the first pressure cavity, the second two-way cavity is connected to the fourth oil outlet cavity, the first oil outlet cavity is connected to the second two-way cavity, the fourth oil outlet cavity is connected to the second oil outlet cavity, the second pressure cavity is connected to the second oil outlet cavity, the first two-way cavity is connected to the second oil outlet cavity, the third oil return cavity is connected to the first two-way cavity, the second oil return cavity is connected to the first two-way cavity, the first oil return cavity, and the three-way cavity, and the third oil outlet cavity is connected to the three-way cavity and the third pressure cavity. Beneficial effects

[0021] This invention's valve block integrates multiple oil supply channels, multiple pressure level outputs, multiple port outputs, and independent continuous pressure regulation outputs into one highly integrated unit, offering flexible and versatile usage. The oil supply can simultaneously pump oil from multiple channels, or pump oil from one channel while storing energy in the others for backup, meeting the high flow demands of multiple three-way solenoid valves operating simultaneously. The overflow oil source from the high-pressure front end serves as the oil supply source for the next low-pressure stage, enabling multiple pressure-dividing uses of the main pump oil. This avoids energy waste from directly returning high-pressure oil to the tank after a single use, effectively reducing system heat generation and eliminating the need for separate cooling equipment, thus preventing secondary energy waste. Multiple output ports are densely arranged on the highly integrated valve block, maximizing the fulfillment of external actuator requirements without external diversion or throttling, resulting in excellent dynamic control response characteristics to external mechanisms. The front-end three-way solenoid valves supplied with primary pressure oil can be independently and continuously pressure-regulated, enabling the valve block to continuously control pressure changes in external mechanisms. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a three-dimensional isometric view of the valve block according to a preferred embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of a three-dimensional isometric view of the valve block according to a preferred embodiment of the present invention. Figure 2 ;

[0024] Figure 3 This is a front view of the valve block according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a top view of the valve block according to a preferred embodiment of the present invention;

[0026] Figure 5 This is a bottom view of the valve block according to a preferred embodiment of the present invention;

[0027] Figure 6 This is a left view of the valve block according to a preferred embodiment of the present invention;

[0028] Figure 7 This is a right view of the valve block according to a preferred embodiment of the present invention;

[0029] Figure 8 This is a cross-sectional view of the valve block AA according to a preferred embodiment of the present invention;

[0030] Figure 9 This is a cross-sectional view of valve block BB according to a preferred embodiment of the present invention;

[0031] Figure 10 This is a CC cross-sectional view of the valve block according to a preferred embodiment of the present invention;

[0032] Figure 11 This is a cross-sectional view of the valve block DD according to a preferred embodiment of the present invention;

[0033] Figure 12 This is a cross-sectional view of the valve block EE according to a preferred embodiment of the present invention;

[0034] Figure 13 This is a cross-sectional view of the valve block FF according to a preferred embodiment of the present invention;

[0035] Figure 14 This is a cross-sectional view of the valve block GG according to a preferred embodiment of the present invention;

[0036] Figure 15 This is a cross-sectional view of the valve block HH according to a preferred embodiment of the present invention;

[0037] Figure 16 This is a cross-sectional view of valve block JJ according to a preferred embodiment of the present invention;

[0038] Figure 17 This is a cross-sectional view of valve block KK according to a preferred embodiment of the present invention;

[0039] Figure 18 This is a cross-sectional view of the valve block LL according to a preferred embodiment of the present invention. Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0041] See Figures 1-18 The hydraulic integrated valve block is a cuboid, mainly composed of a first surface 1, a second surface 2, a third surface 3, a fourth surface 4, and a fifth surface 5. The second surface 2, the third surface 3, the fourth surface 4, and the fifth surface 5 are perpendicular to the first surface 1, the second surface 2 is parallel to the fourth surface 4, and the third surface 3 and the fifth surface 5 are perpendicular to the fourth surface 4. The first surface 1 is provided with a first pressure cavity 11, a first oil outlet cavity 12, a second pressure cavity 13, a third pressure cavity 14, a first two-way cavity 15, a first oil inlet cavity 16, and a three-way cavity 17.

[0042] The second surface 2 is provided with a fastening hole 21 and a first oil return cavity 22;

[0043] The third type surface 3 is provided with a second oil return cavity 31, a second oil outlet cavity 32, and a second oil inlet cavity 33;

[0044] The fourth surface 4 is provided with a countersunk hole 41, a third oil return cavity 42, a third oil outlet cavity 43, and a fourth oil outlet cavity 44;

[0045] The fifth surface 5 is provided with a second two-way cavity 51.

[0046] In this embodiment, the first pressure cavity 11, the second pressure cavity 13, and the third pressure cavity 14 each include a connecting part and a flow channel. The connecting part is provided with a pressure sensor, which monitors the pressure of the hydraulic oil from the flow channel. When there is no pressure monitoring in the pressure cavity, a screw plug is provided in the connecting part of the pressure cavity to seal the pressure cavity.

[0047] In this embodiment, the first oil outlet cavity 12, the second oil outlet cavity 32, the third oil outlet cavity 43, and the fourth oil outlet cavity 44 each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to be output. When there is no external actuator in the oil outlet cavity, a screw plug is provided in the connecting part of the oil outlet cavity to seal the oil outlet cavity.

[0048] In this embodiment, the first two-way cavity 15 and the second two-way cavity 51 respectively include a connecting part, a receiving cavity, an oil inlet channel, and an oil return channel. A two-way overflow valve is provided in the receiving cavity. The overflow valve is fixedly connected to the valve body through the connecting part. The pressure oil enters the overflow valve through the oil inlet channel. When the pressure of the pressure oil is greater than the set pressure of the overflow valve, the overflow valve opens to overflow. The overflowed oil is output through the oil return channel. When the system does not use pressure-building overflow flow, a screw plug is provided at the connecting part of the two-way cavity to seal the two-way cavity. The pressure oil enters the receiving cavity through the oil inlet channel and then enters the oil return channel.

[0049] In this embodiment, the first oil inlet cavity 16 and the second oil inlet cavity 33 each include a connecting part and a flow channel. The connecting part is provided with a pressure oil source, which is a pump station or an energy storage device. The pressure oil is input into the valve body through the flow channel.

[0050] In this embodiment, the three-way cavity 17 includes a connecting part, an oil inlet channel, an oil outlet channel, a return oil channel, and a sealing strip. A three-way solenoid valve is installed inside the three-way cavity 17. A sealing element is provided between the valve body of the three-way solenoid valve and the sealing strip to separate the oil inlet channel and the oil outlet channel, and to separate the oil outlet channel and the return oil channel. The three-way solenoid valve is fixedly connected to the valve body through the connecting part. The P port of the three-way solenoid valve is located in the oil inlet channel, the A port of the three-way solenoid valve is located in the oil outlet channel, and the T port of the three-way solenoid valve is located in the return oil channel. The three-way solenoid valve controls the pressure oil in the oil inlet channel to flow in through the P port and then flow out through the A port to enter the oil outlet channel for output. The return oil in the oil outlet channel can flow back through the A port of the three-way solenoid valve and then flow out through the T port to enter the return oil channel. The three-way solenoid valve can change the output pressure of the A port.

[0051] In this embodiment, the first return oil cavity 22, the second return oil cavity 31, and the third return oil cavity 42 each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to output return oil. When there is no external output from the return oil cavity, a screw plug is provided at the connecting part of the return oil cavity to seal the return oil cavity.

[0052] In this embodiment, the fastening hole 21 and the countersunk hole 41 are coaxially connected. The valve block is installed on the main unit by a screw set in the fastening hole 21. The head of the screw is located in the countersunk hole 41 and the screw head does not protrude from the valve block surface.

[0053] In this embodiment, the flow channel of the second oil inlet cavity 33 is connected to the flow channel of the first oil inlet cavity 16 and the oil inlet channel of the three-way cavity 17, respectively. The flow channel of the second oil inlet cavity 33 is connected to the oil inlet channel of the second two-way cavity 51. The oil inlet channel of the second two-way cavity 51 is connected to the flow channel of the first pressure cavity 11. The return oil channel of the second two-way cavity 51 is connected to the flow channel of the fourth oil outlet cavity 44. The flow channel of the first oil outlet cavity 12 is connected to the return oil channel of the second two-way cavity 51. The flow channel of the fourth oil outlet cavity 44 is connected to the flow channel of the second oil outlet cavity 32. The flow channels of the second pressure cavity 13 and the second oil outlet cavity 32 are connected. The oil inlet channel of the first two-way cavity 15 is connected to the flow channel of the second oil outlet cavity 32. The flow channel of the third return cavity 42 is connected to the return oil channel of the first two-way cavity 15. The flow channel of the second return cavity 31 is connected to the return oil channel of the first two-way cavity 15, the flow channel of the first return cavity 22, and the return oil channel of the three-way cavity 17. The flow channel of the third oil outlet cavity 43 is connected to the oil outlet channel of the three-way cavity 17 and the flow channel of the third pressure cavity 14.

[0054] The control method of the hydraulic integrated valve block is as follows: pressurized oil enters the valve block from the first inlet cavity 16 and the second inlet cavity 33. A portion of the pressurized oil is delivered to the three-way cavity 17, flows through the three-way solenoid valve, and is output from the third outlet cavity 43 to control the actuator. The pressure sensor in the third pressure cavity 14 provides feedback on the pressure of the pressurized oil output from the three-way solenoid valve. The control system controls the three-way solenoid valve to change the output pressure according to the feedback pressure to suit the needs of the actuator. The pressurized oil returning through the T port of the three-way solenoid valve enters the first return cavity 22 and the second return cavity 31 for return oil.

[0055] Another portion of the pressurized oil is delivered to the second two-way cavity 51, and after overflowing through the overflow valve, it is delivered to the first oil outlet cavity 12, the second oil outlet cavity 32, the fourth oil outlet cavity 44, the third oil return cavity 42, and the first two-way cavity 15. The pressurized oil delivered to the first oil outlet cavity 12, the second oil outlet cavity 32, the fourth oil outlet cavity 44, and the third oil return cavity 42 is delivered to the actuator. The pressurized oil delivered to the first two-way cavity 15 overflows through the overflow valve and is delivered to the second oil return cavity 31 and the first oil return cavity 22.

[0056] The pressure of the oil inlet channel of the three-way cavity 17 is set by the overflow valve installed in the second two-way cavity 51, and is monitored and fed back to the control system by the pressure sensor installed in the first pressure cavity 11. The control system controls the pumping oil volume to the first oil inlet cavity 16 and the second oil inlet cavity 33 according to the feedback pressure. The pressure of the pressure oil delivered to the first oil outlet cavity 12, the second oil outlet cavity 32, the fourth oil outlet cavity 44, and the third return oil cavity 42 is set by the overflow valve installed in the first two-way cavity 15, and is monitored and fed back to the control system by the pressure sensor installed in the second pressure cavity 13, thereby judging the operating status of the hydraulic system.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic integrated valve block, mainly composed of a first surface, a second surface, a third surface, a fourth surface, and a fifth surface forming the valve block body, wherein the second surface, the third surface, the fourth surface, and the fifth surface are perpendicular to the first surface, the second surface is parallel to the fourth surface, and the third surface and the fifth surface are perpendicular to the fourth surface, characterized in that, The first mold surface is provided with a first pressure cavity, a first oil outlet cavity, a second pressure cavity, a third pressure cavity, a first two-way cavity, a first oil inlet cavity, and a three-way cavity; the second mold surface is provided with a fastening hole and a first oil return cavity; the third mold surface is provided with a second oil return cavity, a second oil outlet cavity, and a second oil inlet cavity; the fourth mold surface is provided with a countersunk hole, a third oil return cavity, a third oil outlet cavity, and a fourth oil outlet cavity; and the fifth mold surface is provided with a second two-way cavity. The second oil inlet cavity is connected to the first oil inlet cavity and the three-way cavity, the second oil inlet cavity is connected to the second two-way cavity, the second two-way cavity is connected to the first pressure cavity, the second two-way cavity is connected to the fourth oil outlet cavity, the first oil outlet cavity is connected to the second two-way cavity, the fourth oil outlet cavity is connected to the second oil outlet cavity, the second pressure cavity is connected to the second oil outlet cavity, the first two-way cavity is connected to the second oil outlet cavity, the third oil return cavity is connected to the first two-way cavity, the second oil return cavity is connected to the first two-way cavity, the first oil return cavity, and the three-way cavity, and the third oil outlet cavity is connected to the three-way cavity and the third pressure cavity.

2. The hydraulic integrated valve block according to claim 1, characterized in that, The first pressure cavity, the second pressure cavity, and the third pressure cavity each include a connecting part and a flow channel. The connecting part is equipped with a pressure sensor, which monitors the pressure of the hydraulic oil from the flow channel. When there is no pressure monitoring in the pressure cavity, a screw plug is installed in the connecting part of the pressure cavity to seal the pressure cavity.

3. The hydraulic integrated valve block according to claim 1, characterized in that, The first, second, third, and fourth oil outlet cavities each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to be output. When there is no external actuator in the oil outlet cavity, a screw plug is provided in the connecting part of the oil outlet cavity to seal the oil outlet cavity.

4. The hydraulic integrated valve block according to claim 1, characterized in that, The first oil inlet cavity and the second oil inlet cavity each include a connecting part and a flow channel. The connecting part is equipped with a pressure oil source, which is a pump station or an energy storage device. The pressure oil is input into the valve body through the flow channel.

5. The hydraulic integrated valve block according to claim 1, characterized in that, The first return oil cavity, the second return oil cavity, and the third return oil cavity each include a connecting part and a flow channel. The connecting part is provided with an output pipe, which guides the hydraulic oil in the flow channel to output return oil. When there is no external output from the return oil cavity, a screw plug is provided at the connecting part of the return oil cavity to seal the return oil cavity.

6. The hydraulic integrated valve block according to claim 1, characterized in that, The fastening hole and the countersunk hole are coaxially connected. The valve block is installed on the main unit by a screw set in the fastening hole, with the head of the screw located in the countersunk hole.

7. The hydraulic integrated valve block according to claim 1, characterized in that, The three-way cavity includes a connecting part, an oil inlet channel, an oil outlet channel, an oil return channel, and a sealing strip. A three-way solenoid valve is installed inside the three-way cavity. A sealing element is installed between the valve body of the three-way solenoid valve and the sealing strip to separate the oil inlet channel and the oil outlet channel, and to separate the oil outlet channel and the oil return channel. The three-way solenoid valve is fixedly connected to the valve body through the connecting part.

8. The hydraulic integrated valve block according to claim 7, characterized in that, The first two-way cavity and the second two-way cavity each include a connecting part, a receiving cavity, an oil inlet channel, and an oil return channel. A two-way relief valve is installed in the receiving cavity. The relief valve is fixedly connected to the valve body through the connecting part. Pressure oil enters the relief valve through the oil inlet channel. When the pressure of the pressure oil is greater than the set pressure of the relief valve, the relief valve opens to overflow. The overflowed oil is output through the oil return channel. When the system does not use pressure-building overflow flow, a screw plug is installed at the connecting part of the two-way cavity to seal the two-way cavity. Pressure oil enters the receiving cavity through the oil inlet channel and then enters the oil return channel.

9. A hydraulic integrated valve block control method, used in the hydraulic integrated valve block of claim 8, characterized in that, Pressure oil enters the valve block from the first and second inlet cavities. A portion of the pressure oil is delivered to the three-way cavity, flows through the three-way solenoid valve, and is output from the third outlet cavity to control the actuator. The pressure sensor in the third pressure cavity provides feedback on the pressure of the pressure oil output from the three-way solenoid valve. The control system controls the three-way solenoid valve to change the output pressure according to the feedback pressure to suit the needs of the actuator. The pressure oil returning through the three-way solenoid valve enters the first and second return cavities for return oil. Another portion of the pressurized oil is delivered to the second two-way cavity, and after overflowing through the overflow valve, it is delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, the third oil return cavity, and the first two-way cavity. The pressurized oil delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, and the third oil return cavity is delivered to the actuator. The pressurized oil delivered to the first two-way cavity overflows through the overflow valve and is then delivered to the second oil return cavity and the first oil return cavity. The pressure of the oil inlet channel of the three-way cavity is adjusted by the overflow valve installed in the second two-way cavity, and monitored and fed back to the control system by the pressure sensor installed in the first pressure cavity. The control system controls the pumping oil volume to the first oil inlet cavity and the second oil inlet cavity according to the feedback pressure. The pressure of the pressure oil delivered to the first oil outlet cavity, the second oil outlet cavity, the fourth oil outlet cavity, and the third return oil cavity is adjusted by the overflow valve installed in the first two-way cavity, and monitored and fed back to the control system by the pressure sensor installed in the second pressure cavity, thereby judging the operating status of the hydraulic system.

10. The hydraulic integrated valve block control method according to claim 9, characterized in that, The P port of the three-way solenoid valve is located in the oil inlet channel, the A port is located in the oil outlet channel, and the T port is located in the oil return channel. The pressure oil in the oil inlet channel is controlled by the three-way solenoid valve to flow in through the P port and then out through the A port to enter the oil outlet channel for output. The return oil in the oil outlet channel can flow back through the A port of the three-way solenoid valve and then out through the T port to enter the oil return channel. The three-way solenoid valve can change the output pressure of the A port.

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