Manual and hydraulic integrated control valve and hydraulic control system

Abstract

The invention relates to the technical field of hydraulic equipment, and discloses a manual and hydraulic integrated control valve and a hydraulic control system.The manual and hydraulic integrated control valve comprises an end cover assembly, a valve body is arranged on the rear portion of the end cover assembly, an oil pipe connecting opening is formed in the bottom of the valve body, and oil way channels are formed in the valve body and the end cover assembly; the oil way channel is communicated with the oil pipe connector, a push rod and a valve element are arranged in the oil way channel, a front plug is arranged on the front portion of the push rod, the rear portion of the push rod is in threaded connection with the front portion of the valve element, a mounting portion is arranged on the outer wall of the front portion of the push rod, and an operating rod is arranged on the upper portion of the push rod. The bottom of the operating rod is located in the mounting part, and a pushing structure is arranged on the rear portion of the valve element. The fifth plugging ring can make contact with the inner wall of the valve body, then the first cavity is an independent space, and therefore it can be guaranteed that a hydraulic component of the construction machine is in a static state when oil supply is recovered, and the hydraulic component is prevented from being started to damage the engineering machine.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic equipment, and particularly to a manual hydraulic integrated control valve and a hydraulic control system. Background Art

[0002] Hydraulic control valves are important components of hydraulic systems, mainly used to control and regulate the pressure, flow rate, and direction of the oil in the hydraulic system to meet the working requirements of various hydraulic equipment. They can be classified into pressure control valves, flow control valves, and direction control valves according to their functions. Pressure control valves include overflow valves, pressure reducing valves, etc. The overflow valve can keep the system pressure constant and prevent overload, while the pressure reducing valve can provide a stable low pressure for a specific branch. Flow control valves such as throttle valves and speed control valves regulate the flow rate by changing the size of the throttle orifice to control the movement speed of the actuator. Direction control valves include reversing valves, check valves, etc. The reversing valve is used to change the flow direction of the oil to achieve the start, stop, and reversing of the actuator, and the check valve allows the oil to flow in only one direction to prevent backflow. Hydraulic control valves have the advantages of high control accuracy, fast response speed, and convenient operation, and are widely used in fields such as machine tools, construction machinery, and metallurgical equipment, playing a key role in improving the automation level, working efficiency, and reliability of the equipment. The quality of their performance directly affects the working performance and quality of the hydraulic system and is one of the core components to ensure the normal operation of hydraulic equipment.

[0003] For traditional manual hydraulic integrated control valves, when the oil supply is accidentally interrupted, workers need to manually adjust the operating lever to the stationary position. However, in some emergency situations, workers may forget to adjust the operating lever. When the oil supply is restored, it will directly drive the hydraulic machinery to work, thus causing construction hazards and damage to construction machinery. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a manual hydraulic integrated control valve, which solves the problem that for traditional manual hydraulic integrated control valves, when the oil supply is accidentally interrupted, workers need to manually adjust the operating lever to the stationary position. However, in some emergency situations, workers may forget to adjust the operating lever. When the oil supply is restored, it will directly drive the hydraulic machinery to work, thus causing construction hazards and damage to construction machinery.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A manual hydraulic integrated control valve includes an end cover assembly. A valve body is provided at the rear of the end cover assembly. An oil pipe connection port is provided at the bottom of the valve body. An oil passage is provided inside the valve body and the end cover assembly. The oil passage is communicated with the oil pipe connection port. A push rod and a valve core are provided inside the oil passage. A front plug is provided at the front of the push rod. The rear of the push rod is threadedly connected to the front of the valve core. An installation portion is provided on the outer wall of the front of the push rod. An operating rod is provided at the upper part of the push rod. The bottom of the operating rod is located inside the installation portion. A pushing structure is provided at the rear of the valve core. An oil supply passage is provided in the middle of the push rod and the valve core. A first chamber is provided inside the end cover assembly. The first chamber is communicated with the oil supply passage. The tail of the valve core and the inner wall of the valve body divide the first chamber from the oil passage inside the valve body.

[0006] Preferably, the oil supply passage includes an inner oil passage. A second oil port is provided on the outer wall of the push rod. A first oil port is provided on the outer wall of the valve core. The inner oil passage is communicated with the second oil port and the first oil port.

[0007] Preferably, the oil pipe connection port includes a T-shaped oil port, an A-shaped oil port, a B-shaped oil port, and a P-shaped oil port. The oil passage includes a fifth chamber, a second chamber, a fourth chamber, a third chamber, and a communication chamber. The T-shaped oil port is communicated with the fifth chamber. The A-shaped oil port is communicated with the second chamber. The B-shaped oil port is communicated with the fourth chamber. The P-shaped oil port is communicated with the third chamber. The fifth chamber, the second chamber, the fourth chamber, and the third chamber are communicated through the communication chamber.

[0008] Preferably, the installation portion includes a second installation hole and a first installation hole. The second installation hole is located at the front of the push rod. The first installation hole is located at the front of the end cover assembly. A rotating shaft is provided at the lower part of the operating rod. The rotating shaft is rotatably connected inside the first installation hole.

[0009] Preferably, the pushing structure includes a return spring, a rear plug, and a limiting post. The rear plug is provided at the rear of the valve body. A limiting post is provided inside the rear plug. The inside of the rear plug is a hollow structure. A return spring is provided outside the limiting post.

[0010] Preferably, a second sealing ring is provided on the outer wall of the valve core. A first sealing ring is provided on the side of the second sealing ring close to the push rod. A first oil port is provided between the second sealing ring and the first sealing ring. A third sealing ring is provided on the side of the first sealing ring close to the push rod. A fourth sealing ring is provided on the side of the third sealing ring close to the push rod. A fifth sealing ring is provided on the side of the fourth sealing ring close to the push rod.

[0011] Preferably, rubber rings are provided on the outer walls of the fourth sealing ring, the third sealing ring, the first sealing ring and the second sealing ring, and the outer walls of the rubber rings are closely attached to the inner wall of the valve body.

[0012] Preferably, a sealing Gleit ring is provided on the outer wall of the push rod, and the outer wall of the sealing Gleit ring is slidably connected to the inner wall of the end cover assembly.

[0013] Preferably, an operation hole is provided at the top of the end cover assembly, the operation rod passes through the operation hole, a rubber dust cover is provided at the bottom of the operation rod, and the bottom of the rubber dust cover is located above the operation hole.

[0014] A hydraulic control system includes a manual hydraulic integrated control valve, a hydraulic pump, a hydraulic cylinder, a hydraulic motor, an oil tank, a radiator, a safety valve and a relief valve. The hydraulic pump is used to extract oil from the oil tank and then input the oil into the manual hydraulic integrated control valve through a pipeline. The manual hydraulic integrated control valve adjusts the oil flow to the hydraulic cylinder and the hydraulic motor. The hydraulic motor is used to drive the coal mining machinery vehicle to travel. The hydraulic cylinder is used to control the lifting angle of the cargo box. The radiator is used to reduce the oil temperature. The safety valve is used to limit the maximum pressure of the oil, and the relief valve is used to stabilize the oil pressure.

[0015] Working principle: By pulling the operation rod, the push rod is pushed to move to the right, and then the valve core is pushed to move to the right. The oil is input into the third chamber through the P oil port, and then flows into the fourth chamber through the connecting chamber, and then is transported from the B oil port to the input end of the hydraulic component of the construction machinery. Part of the oil is transported into the inner oil passage through the first oil port and then discharged from the second oil port into the first chamber, so that the pressure in the first chamber is greater than the thrust of the return spring. Then the oil is transported from the output end of the hydraulic component to the A oil port and then into the second chamber, and then is transported to the fifth chamber through the connecting chamber and then discharged from the T oil port, so that the control valve forms a working state. When the oil supply is interrupted, the oil in the first chamber is discharged from the second oil port through the inner oil passage and the first oil port into the fourth chamber and then flows out through the B oil port. At this time, the pressure in the first chamber is less than the thrust of the return spring, and then the valve core is pushed backward through the inner oil passage, so that the control valve is converted to a stationary state. At this time, if the oil is supplied normally, the oil will be transported into the third chamber through the P oil port, and then into the second chamber through the connecting chamber, and then transported to the hydraulic component, so that the hydraulic component is in a stationary state.

[0016] The present invention provides a manual hydraulic integrated control valve. It has the following beneficial effects: 1. In the present invention, the fifth sealing ring can contact the inner wall of the valve body, so that the first chamber becomes an independent space. During the working state, the oil in the fourth chamber can be transported into the inner oil passage through the first oil port on the outer wall of the valve core, and then output from the second oil port into the first chamber, making the pressure in the first chamber greater than the thrust of the return spring. Thus, when the oil supply is cut off, the oil in the first chamber can be discharged from the second oil port through the inner oil passage, from the first oil port into the fourth chamber and then discharged from the B oil port. At this time, the pressure in the first chamber is less than the thrust of the return spring, and then the valve core is pushed to the left by the return spring, forcing the control valve to be in a static state. Therefore, when the oil supply is restored, it can ensure that the hydraulic components of the construction machinery are in a static state, preventing the hydraulic components from starting and causing construction hazards and damage to the construction machinery.

[0017] 2. In the present invention, by arranging a sealing Glyd ring on the outer wall of the push rod, the friction between the push rod and the end cover assembly is reduced, thereby improving the sealing performance and the durability of the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a bottom three-dimensional structural schematic diagram of the present invention; Figure 3 is a functional symbol schematic diagram of the present invention; Figure 4 is a sectional structural schematic diagram of the present invention when the operating rod is in a static state; Figure 5 is a sectional structural schematic diagram of the present invention when the operating rod is in a working state; Figure 6 is a three-dimensional structural schematic diagram of the valve core and the push rod of the present invention; Figure 7 is a sectional structural schematic diagram of the valve core and the push rod of the present invention; Figure 8 is a sectional structural schematic diagram of the end cover assembly and the valve body of the present invention.

[0019] Among them, 1. Valve body; 2. End cover assembly; 3. Push rod; 4. Return spring; 5. Rear plug; 6. Operating rod; 7. T oil port; 8. A oil port; 9. B oil port; 10. P oil port; 11. Rubber dust cover; 12. Rotating shaft; 13. Front plug; 14. Sealing Glyd ring; 15. First chamber; 16. Inner oil passage; 17. Second chamber; 18. Valve core; 19. Third chamber; 20. Fourth chamber; 21. First mounting hole; 22. Connecting chamber; 23. First sealing ring; 24. Second sealing ring; 25. Fifth chamber; 26. First oil port; 27. Third sealing ring; 28. Fourth sealing ring; 29. Fifth sealing ring; 30. Second mounting hole; 31. Second oil port; 32. Limit post. Detailed implementation manner

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0021] Please refer to the attached Figure 2 - attached Figure 4 , the embodiment of the present invention provides a manual hydraulic integrated control valve, which includes an end cover assembly 2. A valve body 1 is arranged at the rear of the end cover assembly 2. An oil pipe connection port is arranged at the bottom of the valve body 1. Oil passage channels are opened inside the valve body 1 and the end cover assembly 2. The oil passage channels are communicated with the oil pipe connection port. A push rod 3 and a valve core 18 are arranged inside the oil passage channels. A front plug 13 is arranged at the front of the push rod 3. The rear of the push rod 3 is threadedly connected to the front of the valve core 18. An installation portion is opened on the outer wall of the front of the push rod 3. An operating rod 6 is arranged at the upper part of the push rod 3. The bottom of the operating rod 6 is located inside the installation portion. A top-pushing structure is arranged at the rear of the valve core 18. An oil supply passage is opened in the middle of the push rod 3 and the valve core 18. A first chamber 15 is opened inside the end cover assembly 2. The first chamber 15 is communicated with the oil supply passage. The tail of the valve core 18 and the inner wall of the valve body 1 divide the first chamber 15 from the oil passage channel inside the valve body 1.

[0022] Specifically, the end cover assembly 2 can be used to place the operating rod 6 and at the same time can cooperate with the valve body 1 to form an oil circuit system; the valve body 1 can be used to install the rear plug 5 and at the same time can form an oil circuit system; the oil pipe connection port can be used to connect the oil storage device and the hydraulic components of the machine; the oil circuit channel can be used to supply the flow of the hydraulic fluid; the oil circuit channel is connected to the oil pipe connection port, so that the hydraulic fluid connecting the oil storage device and the hydraulic components of the machine can flow inside the oil circuit channel; the push rod 3 can be used to control the forward and backward movement of the valve core 18; the rear part of the push rod 3 is threadedly connected to the front part of the valve core 18, which can reduce the processing difficulty and facilitate assembly; the valve core 18 can be used to control the flow direction of the hydraulic fluid inside the oil circuit; the front plug 13 can be used to block the oil circuit; the rear part of the push rod 3 is threadedly connected to the front part of the valve core 18, which can make the connection between the push rod 3 and the valve core 18 closer, thereby improving the transmission efficiency; the installation part can be used to install the operating rod 6; the operating rod 6 can be used to drive the push rod 3 to move forward and backward, thereby driving the valve core 18 to move forward and backward, so as to change the flow direction of the hydraulic fluid inside the oil circuit channel; the pushing structure can push the valve core 18 towards the operating rod 6; the oil supply channel can make the hydraulic fluid in the oil circuit channel flow between the first chamber 15 and the oil circuit channel; the tail of the valve core 18 and the inner wall of the valve body 1 divide the first chamber 15 from the oil circuit channel inside the valve body 1, and the diameter of the tail of the valve core 18 is the same as the diameter of the inner wall of the valve body 1 here, which can seal the first chamber 15, so that the first chamber 15 forms an independent oil storage chamber; when the operating rod 6 is pulled to the working position, the hydraulic fluid flows inside the oil circuit channel and at the same time part of the hydraulic fluid will flow into the first chamber 15 through the oil supply channel, so that the pressure inside the first chamber 15 increases, and then provides a thrust to the valve core 18 to the right, so as to maintain the working position. At this time, the hydraulic components of the construction machinery are in the working state. When the hydraulic fluid in the oil circuit channel is cut off, the hydraulic fluid inside the first chamber 15 will be discharged from the oil pipe connection port through the oil supply channel, so that the pressure inside the first chamber 15 decreases. When the pressure inside the first chamber 15 is lower than the thrust of the pushing structure, the pushing structure will push the valve core 18 to the left, so that the oil circuit channel is switched to the stationary position. At this time, the hydraulic components of the construction machinery are in the stationary state. Thus, when the oil pipe connection port conveys hydraulic fluid into the oil circuit channel, the hydraulic components of the construction machinery can still be kept in the stationary state, so as to avoid accidental start-up of the hydraulic components causing personal danger and mechanical damage.

[0023] Please refer to the attached Figure 5 - attached Figure 7 , the oil supply channel includes an inner oil passage 16. A second oil port 31 is formed on the outer wall of the push rod 3, and a first oil port 26 is formed on the outer wall of the valve core 18. The inner oil passage 16 is connected to the second oil port 31 and the first oil port 26.

[0024] Specifically, the first oil port 26 can be used to convey oil into or out of the inner oil passage 16; the second oil port 31 can be used to convey oil into or out of the first chamber 15; and the inner oil passage 16 can be used to connect the first oil port 26 and the second oil port 31.

[0025] Please refer to the appendix Figure 2 and the appendix Figure 8 As shown, the tubing connection port includes the T-port 7, A-port 8, B-port 9, and P-port 10. The oil passage includes the fifth chamber 25, second chamber 17, fourth chamber 20, third chamber 19, and the connecting chamber 22. The T-port 7 is connected to the fifth chamber 25, the A-port 8 is connected to the second chamber 17, the B-port 9 is connected to the fourth chamber 20, and the P-port 10 is connected to the third chamber 19. The fifth chamber 25, second chamber 17, fourth chamber 20, and third chamber 19 are connected through the connecting chamber 22.

[0026] Specifically, the T-port 7 can be used to discharge the oil inside the fifth chamber 25; the A-port 8 can be used to discharge the oil inside the second chamber 17; the B-port 9 can be used to discharge the oil inside the fourth chamber 20; the P-port 10 can be used to convey oil into the third chamber 19; the connecting chamber 22 can be used to connect the second chamber 17 with the fifth chamber 25, the fifth chamber 25 with the fourth chamber 20, the fourth chamber 20 with the third chamber 19, and the third chamber 19 with the second chamber 17. When in the static state, the oil is controlled to be input from the P-port 10, then discharged from the third chamber 19, flows through the connecting chamber 22 to the second chamber 17, then is conveyed to the input end of the hydraulic component of the construction machinery, then is conveyed from the output end of the hydraulic component to the inside of the fourth chamber 20, then flows through the connecting chamber 22 to the fifth chamber 25, and then is discharged from the T-port 7. When the control lever 6 is pulled to move the spool 18 backward to the working position, the oil is input from the P-port 10, then discharged from the third chamber 19, flows through the connecting chamber 22 to the fourth chamber 20, then is conveyed to the input end of the hydraulic component of the construction machinery, then is conveyed from the output end of the hydraulic component to the inside of the second chamber 17, then flows through the connecting chamber 22 to the fifth chamber 25, and then is discharged from the T-port 7.

[0027] Please refer to the appendix Figure 5 and the appendix Figure 6 and the appendix Figure 8, the installation part includes a second installation hole 30 and a first installation hole 21. The second installation hole 30 is located at the front of the push rod 3, and the first installation hole 21 is located at the front of the end cap assembly 2. A rotating shaft 12 is provided at the lower part of the operating rod 6, and the rotating shaft 12 is rotatably connected to the inside of the first installation hole 21.

[0028] Specifically, the second installation hole 30 can be used to install the bottom of the operating rod 6; the first installation hole 21 can play a role in restricting the movement of the rotating shaft 12, so that the operating rod 6 can control the front and back movement of the bottom of the operating rod 6 with the rotating shaft 12 as the fulcrum, and then control the front and back movement of the push rod 3, thereby driving the spool 18 to move back and forth, and then changing the flow direction of the oil in the oil passage.

[0029] Please refer to the appendix Figure 3 and the appendix Figure 7 and the appendix Figure 8 , the pushing structure includes a return spring 4, a rear plug 5 and a limit post 32. The rear plug 5 is arranged at the rear of the valve body 1, a limit post 32 is arranged inside the rear plug 5, the inside of the rear plug 5 is a hollow structure, and a return spring 4 is arranged outside the limit post 32.

[0030] Specifically, the return spring 4 can play a role in pushing the spool 18; the rear plug 5 can play a role in limiting the movement range of the spool 18, so as to avoid the excessive movement of the spool 18 causing the excessive change of the oil flow direction and losing the function of oil flow reversal; since the inside of the rear plug 5 is a hollow structure, the oil can enter the inside of the rear plug 5, and the pressure inside the rear plug 5 is balanced with the first chamber 15 in the static state.

[0031] Please refer to the appendix Figure 5 and the appendix Figure 6 and the appendix Figure 7 , a second sealing ring 24 is arranged on the outer wall of the spool 18. A first sealing ring 23 is arranged on the side of the second sealing ring 24 close to the push rod 3. A first oil port 26 is arranged between the second sealing ring 24 and the first sealing ring 23. A third sealing ring 27 is arranged on the side of the first sealing ring 23 close to the push rod 3. A fourth sealing ring 28 is arranged on the side of the third sealing ring 27 close to the push rod 3. A fifth sealing ring 29 is arranged on the side of the fourth sealing ring 28 close to the push rod 3. Rubber rings are arranged on the outer walls of the fourth sealing ring 28, the third sealing ring 27, the first sealing ring 23 and the second sealing ring 24, and the outer walls of the rubber rings are closely attached to the inner wall of the valve body 1.

[0032] Specifically, the second sealing ring 24, the first sealing ring 23, the third sealing ring 27 and the fourth sealing ring 28 can block the communication between the communication chamber 22 and the fourth chamber 20, and at the same time block the communication between the communication chamber 22 and the second chamber 17. Thus, the flow direction of the oil flowing out of the third chamber 19 can be changed, and then the working state of the hydraulic components of the construction machinery can be controlled; the rubber ring can improve the sealing effect between the valve core 18 and the inner wall of the valve body 1, thereby further improving the efficiency of changing the oil flow direction.

[0033] Please refer to the appendix Figure 5 , a sealing Glyd ring 14 is arranged on the outer wall of the push rod 3, and the outer wall of the sealing Glyd ring 14 is slidably connected with the inner wall of the end cover assembly 2.

[0034] Specifically, by arranging the sealing Glyd ring 14, the sealing effect between the push rod 3 and the inside of the end cover assembly 2 can be improved.

[0035] Please refer to the appendix Figure 1 and the appendix Figure 4 , an operation hole is formed in the top of the end cover assembly 2, the operation rod 6 passes through the operation hole, a rubber dust cover 11 is arranged at the bottom of the operation rod 6, and the bottom of the rubber dust cover 11 is located above the operation hole.

[0036] Specifically, the rubber dust cover 11 can deform correspondingly following the forward and backward movement of the operation rod 6, and then can prevent dust in the environment from entering the inside of the end cover assembly 2 through the operation hole, thereby protecting the internal structure of the control valve.

[0037] The embodiment of the present invention also provides a hydraulic control system, including a manual hydraulic integrated control valve of this embodiment, a hydraulic pump, a hydraulic cylinder, a hydraulic motor, an oil tank, a radiator, a safety valve and a relief valve. The hydraulic pump is used to extract oil from the oil tank and then input the oil into the manual hydraulic integrated control valve through a pipeline. The manual hydraulic integrated control valve adjusts the oil flow direction to the hydraulic cylinder and the hydraulic motor. The hydraulic motor is used to drive the coal mining machinery vehicle to travel, the hydraulic cylinder is used to control the lifting angle of the cargo box, the radiator is used to reduce the oil temperature, the safety valve is used to limit the maximum pressure of the oil, and the relief valve is used to stabilize the oil pressure.

[0038] Specifically, the hydraulic pump is an explosion-proof hydraulic pump, which is driven by an explosion-proof motor. The explosion-proof motor can adapt to the special flammable and explosive environment in coal mines, and can stably output power to drive the hydraulic pump to operate. The hydraulic pump draws oil from the oil tank, and after pressurization, the high-pressure oil is delivered to the manual hydraulic integrated control valve group to provide power support for the entire hydraulic drive system; the hydraulic cylinder and the hydraulic motor can be controlled separately through multiple manual hydraulic integrated control valves, and the oil is delivered to the rodless chamber of the pressure cylinder through the manual hydraulic integrated control valve to push the piston up, and the cargo box is gradually lifted to complete the unloading work. The control valve transports oil into the hydraulic motor, which then rotates the hydraulic motor and drives the mechanical vehicle to move; the safety valve can limit the maximum pressure of the system. When the system pressure exceeds the set value, the safety valve automatically opens to return the excess oil to the tank to prevent the system from being damaged due to excessive pressure; the overflow valve can stabilize the pressure when the system pressure fluctuates to ensure the reliability of the system; the radiator uses water cooling to dissipate the heat of the oil and control the oil temperature within a reasonable range to prevent the oil temperature from rising due to long-term operation of the mechanical vehicle, affecting the system performance and stability.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual hydraulic integrated control valve, comprising an end cover assembly (2), characterized in that: The rear part of the end cover assembly (2) is provided with a valve body (1), the bottom of the valve body (1) is provided with an oil pipe connection port, the valve body (1) and the end cover assembly (2) are provided with an oil passage inside, the oil passage is connected with the oil pipe connection port, a push rod (3) and a valve core (18) are provided inside the oil passage, a front plug (13) is provided at the front part of the push rod (3), the rear part of the push rod (3) is threadedly connected with the front part of the valve core (18), and a mounting portion is provided on the front outer wall of the push rod (3). An operating rod (6) is arranged on the upper part of the push rod (3), the bottom of the operating rod (6) is located inside the mounting portion, a push structure is arranged at the rear of the valve core (18), an oil supply passage is provided in the middle of the push rod (3) and the valve core (18), a first chamber (15) is provided inside the end cover assembly (2), the first chamber (15) is connected to the oil supply passage, and the tail of the valve core (18) and the inner wall of the valve body (1) separate the first chamber (15) from the oil passage inside the valve body (1).

2. A manual hydraulic integrated control valve according to claim 1, characterized in that: The oil supply passage comprises an inner oil passage (16), the outer wall of the push rod (3) is provided with a second oil port (31), the outer wall of the valve core (18) is provided with a first oil port (26), and the inner oil passage (16) is in communication with the second oil port (31) and the first oil port (26).

3. The manual hydraulic integrated control valve according to claim 1, characterized in that: The oil pipe connection port comprises a T oil port (7), an A oil port (8), a B oil port (9), and a P oil port (10); the oil passage comprises a fifth chamber (25), a second chamber (17), a fourth chamber (20), a third chamber (19), and a connecting chamber (22); the T oil port (7) is connected to the fifth chamber (25); the A oil port (8) is connected to the second chamber (17); the B oil port (9) is connected to the fourth chamber (20); the P oil port (10) is connected to the third chamber (19); and the fifth chamber (25), the second chamber (17), the fourth chamber (20), and the third chamber (19) are connected via the connecting chamber (22).

4. The manual hydraulic integrated control valve according to claim 1, characterized in that: The mounting portion comprises a second mounting hole (30) and a first mounting hole (21), the second mounting hole (30) being located at the front of the push rod (3), the first mounting hole (21) being located at the front of the end cover assembly (2), and a rotating shaft (12) being provided at the lower portion of the operating rod (6), the rotating shaft (12) being rotatably connected to the interior of the first mounting hole (21).

5. The manual hydraulic integrated control valve according to claim 1, characterized in that: The push structure comprises a return spring (4), a rear plug (5) and a limit column (32); the rear plug (5) is arranged at the rear of the valve body (1); the limit column (32) is arranged inside the rear plug (5); the interior of the rear plug (5) is a hollow structure; and the return spring (4) is arranged outside the limit column (32).

6. The manual hydraulic integrated control valve according to claim 1, characterized in that: The outer wall of the valve core (18) is provided with a second sealing ring (24); a first sealing ring (23) is provided on a side of the second sealing ring (24) close to the push rod (3); a first oil port (26) is provided between the second sealing ring (24) and the first sealing ring (23); a third sealing ring (27) is provided on a side of the first sealing ring (23) close to the push rod (3); a fourth sealing ring (28) is provided on a side of the third sealing ring (27) close to the push rod (3); and a fifth sealing ring (29) is provided on a side of the fourth sealing ring (28) close to the push rod (3).

7. A manual hydraulic integrated control valve according to claim 6, characterized in that: The outer walls of the fourth sealing ring (28), the third sealing ring (27), the first sealing ring (23) and the second sealing ring (24) are all provided with rubber rings, and the outer walls of the rubber rings are tightly attached to the inner wall of the valve body (1).

8. The manual hydraulic integrated control valve according to claim 6, characterized in that: The outer wall of the push rod (3) is provided with a sealing grid ring (14), and the outer wall of the sealing grid ring (14) is slidably connected to the inner wall of the end cover assembly (2).

9. The manual hydraulic integrated control valve according to claim 1, characterized in that: An operating hole is provided at the top of the end cover assembly (2), the operating rod (6) passes through the operating hole, a rubber dust cover (11) is provided at the bottom of the operating rod (6), and the bottom of the rubber dust cover (11) is located above the operating hole.

10. A hydraulic control system, comprising a manual hydraulic integrated control valve as described in any one of claims 1 to 9, and a hydraulic pump, a hydraulic cylinder, a hydraulic motor, an oil tank, a radiator, a safety valve and a relief valve, the hydraulic pump being used to extract oil from the oil tank and then inputting the oil into the manual hydraulic integrated control valve through a pipeline, the manual hydraulic integrated control valve regulating the flow of oil to the hydraulic cylinder and the hydraulic motor, the hydraulic motor being used to drive a coal mine mechanical vehicle to move, the hydraulic cylinder being used to control the lifting angle of a cargo box, the radiator being used to reduce the oil temperature, the safety valve being used to limit the maximum pressure of the oil, and the relief valve being used to stabilize the oil pressure.

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