A dual-pump and motor-driven water pump suction and drainage hydraulic control system

Abstract

A dual-pump and motor-driven water pump suction and drainage hydraulic control system consists of interconnected functional components and control components. The functional components include hydraulic cylinder 1, hydraulic cylinder 2, and a hydraulic motor for driving the water pump; the control components include a main hydraulic pump, an auxiliary hydraulic pump, and a two-position four-way reversing valve, a two-position two-way solenoid valve 1, a two-position two-way solenoid valve 2, a two-position two-way solenoid valve 3, a two-position two-way solenoid valve 4, a two-position two-way solenoid valve 5, and a two-position two-way solenoid valve 8 arranged on the hydraulic pipeline between the main hydraulic pump, the auxiliary hydraulic pump, and hydraulic cylinders 1 and 2; the main hydraulic pump is connected to the chassis engine of the water supply and drainage rescue vehicle through transmission; the auxiliary hydraulic pump is connected to the chassis gearbox through transmission; the main hydraulic pump and the auxiliary hydraulic pump do not operate simultaneously; the present invention realizes the water pump suction and drainage function through full hydraulic control, does not require electrical facilities, and is applied to the hydraulic drive water pump system of a mobile pump truck, is suitable for a variety of operating environments, and meets the needs of emergency drainage and rescue.

Description

Technical Field

[0001] The invention relates to a suction and drainage control mechanism of a water supply and drainage rescue vehicle, in particular to a suction and drainage hydraulic control system. Background Art

[0002] In the existing technology, the suction and drainage control system of the water supply and drainage rescue vehicle is driven by an electric motor or an internal combustion engine, which can only be fixedly installed and cannot be used in an emergency rescue mobile pump station. In addition, the control system for driving the hydraulic motor adopts an open transmission. In many cases, the hydraulic actuators are arranged at the end of a mechanical arm such as a telescopic arm or an articulated arm, and the oil supply hose of the actuator is arranged along the mechanical arm. Therefore, when the mechanical arm is working, the oil supply hose thereon will continuously stretch or bend with the movement of the mechanical arm, thereby accelerating the aging of the oil supply hose and greatly shortening the service life of the oil supply pipeline. At the same time, the pipeline connection is complex, the control elements are numerous, the manufacturing cost is high, the adaptability to working conditions is poor, the reliability is insufficient, and the product is not beautiful. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a dual-pump and motor-driven water pump suction and drainage hydraulic control system to improve the working stability of the system and the service life of the product.

[0004] The technical solution of the present invention is: a dual-pump and motor-driven water pump suction and drainage hydraulic control system, which is composed of interconnected functional components and control components.

[0005] The functional components include hydraulic cylinder 1, hydraulic cylinder 2, and a hydraulic motor for driving a water pump; the inner cavity of the hydraulic cylinder 1 is divided into a rodless cavity and a rod cavity through a piston rod; the piston rod is a hollow cylindrical structure; the inner cavity of the piston rod is connected to the rodless cavity; two rodless cavity oil ports are symmetrically provided on the cylinder body; a rod cavity oil port is also provided on the cylinder body; an end of the piston rod located outside the cylinder body is provided with an oil port connected to the inner cavity of the piston rod; the structure of hydraulic cylinder 2 is the same as that of hydraulic cylinder 1.

[0006] The control components include a main hydraulic pump P2, an auxiliary hydraulic pump P1, and a two-position four-way reversing valve, a two-position two-way solenoid valve one, a two-position two-way solenoid valve two, a two-position two-way solenoid valve three, a two-position two-way solenoid valve four, a two-position two-way solenoid valve five, and a two-position two-way solenoid valve eight arranged on the hydraulic pipeline between the main hydraulic pump P2, the auxiliary hydraulic pump P1 and the hydraulic cylinder one and the hydraulic cylinder two; the main hydraulic pump P2 is transmission-connected to the chassis engine of the water supply and drainage rescue vehicle; the auxiliary hydraulic pump P1 is transmission-connected to the chassis gearbox of the water supply and drainage rescue vehicle; the main hydraulic pump P2 and the auxiliary hydraulic pump P1 do not work at the same time.

[0007] The auxiliary hydraulic pump P1 is connected to the two-position two-way solenoid valve 2 through the one-way valve 1 and the two-position four-way reversing valve; the oil outlet of the auxiliary hydraulic pump P1 is connected to the oil inlet of the one-way valve 1 through a hydraulic pipeline; the oil outlet of the one-way valve 1 is connected to the port P of the two-position four-way reversing valve through a hydraulic pipeline; the port A of the two-position four-way reversing valve is connected to the port P of the two-position two-way solenoid valve 2 through a hydraulic pipeline; the port A of the two-position two-way solenoid valve 2 is connected to the port B of the dual-hydraulic-controlled one-way valve and the port P of the two-position two-way solenoid valve through a hydraulic pipeline; the port B1 of the dual-hydraulic-controlled one-way valve is connected to the oil port 1 of the rodless chamber of the hydraulic cylinder through a hydraulic pipeline.

[0008] An oil port of the hydraulic cylinder is connected to a working oil port of the hydraulic motor via a hydraulic pipeline.

[0009] The oil port 2 of the rodless chamber of the hydraulic cylinder is connected to the main hydraulic pump P2 through the two-position two-way solenoid valve four and the one-way valve two; the port A of the two-position two-way solenoid valve four is connected to the oil port 2 of the rodless chamber of the hydraulic cylinder through the hydraulic pipeline; the port P of the two-position two-way solenoid valve four is connected to the oil outlet of the one-way valve two, the oil outlet of the one-way valve one, and the port P of the two-position four-way reversing valve through the hydraulic pipeline; the oil inlet of the one-way valve two is connected to the oil outlet of the main hydraulic pump P2 through the hydraulic pipeline; the port A of the two-position two-way solenoid valve five is connected to the oil port 2 of the rodless chamber of the hydraulic cylinder through the hydraulic pipeline; the port P of the two-position two-way solenoid valve five is connected to the port B of the two-position four-way reversing valve through the hydraulic pipeline; the port T of the two-position four-way reversing valve is connected to the oil tank through the hydraulic pipeline.

[0010] A port A1 of the double-hydraulic-controlled one-way valve is connected to a rod chamber oil port of the hydraulic cylinder through a hydraulic pipeline; a port A of the double-hydraulic-controlled one-way valve is connected to a port P of the two-position two-way solenoid valve; and a port A of the two-position two-way solenoid valve is connected to a port B of the two-position four-way reversing valve through a hydraulic pipeline.

[0011] Port A of the two-position two-way solenoid valve is connected to port B of the double-hydraulic controlled one-way valve through a hydraulic pipeline; port B1 of the double-hydraulic controlled one-way valve is connected to port one of the rodless chamber of the hydraulic cylinder two through a hydraulic pipeline; port two of the rodless chamber of the hydraulic cylinder two is connected to the oil tank through the two-position two-way solenoid valve three; port A of the double-hydraulic controlled one-way valve is connected to port P of the two-position two-way solenoid valve eight through a hydraulic pipeline; port A1 of the double-hydraulic controlled one-way valve is connected to port A of the rod chamber of the hydraulic cylinder two through a hydraulic pipeline; port two of the hydraulic cylinder is connected to working port two of the hydraulic motor through a hydraulic pipeline.

[0012] It also includes a remote pressure regulating valve and a safety valve connected between the oil outlet of the main hydraulic pump P2 and the oil tank.

[0013] It also includes a two-position two-way solenoid valve seven connected in parallel with the two-position two-way solenoid valve two (used to quickly extend the piston rods of the hydraulic cylinder one and two); the port A of the two-position two-way solenoid valve seven is connected to the two-position two-way solenoid valve port A, the double-hydraulic controlled one-way valve port B, and the two-position two-way solenoid valve port P via a hydraulic pipeline; the port P of the two-position two-way solenoid valve seven is connected to the port A of the two-position four-way reversing valve via a hydraulic pipeline.

[0014] It also includes a two-position two-way solenoid valve six (used to quickly retract the first and second piston rods of the hydraulic cylinder) connected in parallel with the two-position two-way solenoid valve eight; the port P of the two-position two-way solenoid valve six is ​​connected to the second port A of the double-hydraulic-controlled one-way valve, the first port A of the double-hydraulic-controlled one-way valve, and the port P of the two-position two-way solenoid valve eight through a hydraulic pipeline; the port A of the two-position two-way solenoid valve six is ​​connected to the port B of the two-position four-way reversing valve through a hydraulic pipeline.

[0015] It also includes an unloading reversing valve connected between the oil outlet of the auxiliary hydraulic pump P1 and the oil tank.

[0016] The purpose of the present invention is also to provide a hydraulic cylinder used in the above-mentioned hydraulic control system, the inner cavity of the hydraulic cylinder is divided into a rodless cavity and a rod cavity through a piston rod; the piston rod is a hollow cylindrical structure; the inner cavity of the piston rod is connected to the rodless cavity; two rodless cavity oil ports are symmetrically provided on the cylinder body; a rod cavity oil port is also provided on the cylinder body; the end of the piston rod located outside the cylinder body is provided with an oil port connected to the inner cavity of the piston rod.

[0017] The beneficial technical effects of the present invention are as follows: the power of the hydraulic control system of the present invention is taken from the engine and transmission of the vehicle itself, the full power of the chassis engine is taken off to drive the main hydraulic pump, the power of the chassis transmission is taken off to drive the auxiliary hydraulic pump, the hydraulic oil drives the hydraulic motor through hydraulic pipelines and functional components, the hydraulic motor and the water pump are integrated, and the suction and drainage functions of the water pump are achieved through full hydraulic control, without the need for electrical facilities. The hydraulic drive water pump system applied to mobile pump trucks is suitable for a variety of operating environments and conditions, meeting the needs of emergency and drainage rescue. The present invention adopts the principle of anti-interference control, which can not only control the action sequence of components, but also ensure the normal operation of the water pump drive motor, thereby ensuring the stability of the hydraulic motor when starting and the safety of the water pump. It has the advantages of simple structure, easy operation, high control accuracy, low operating failure rate, etc., while reducing manufacturing costs and improving the overall appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the hydraulic system of the present invention.

[0019] In the figure: 1. Multifunctional component; 2. Control component; 3. Water pump motor connecting block; 4. Water pump; 5. Motor; 6. Hydraulic cylinder 1; 71. Double hydraulic control one-way valve 1; 72. Double hydraulic control one-way valve 2; 8. Two-position two-way solenoid valve 1; 9. Two-position two-way solenoid valve 2; 10. Two-position two-way solenoid valve 3; 11. Two-position two-way solenoid valve 4; 12. Two-position two-way solenoid valve 5; 13. Two-position four-way reversing valve; 1401. One-way valve 1; 1402. One-way valve 2; 15. Safety valve; 16. Remote pressure regulating valve; 17. Unloading reversing valve; 19. Two-position two-way solenoid valve 6; 20. Two-position two-way solenoid valve 7; 21. Two-position two-way solenoid valve 8; 22. Hydraulic cylinder 2. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the embodiments provided in the accompanying drawings.

[0021] Part one, structural components.

[0022] The embodiment includes: a functional component 1 and a control component 2.

[0023] The functional component 1 includes: a hydraulic cylinder 1 6 , a hydraulic cylinder 2 22 , a hydraulic motor 5 for driving a water pump 4 , and a water pump 4 .

[0024] The inner cavity of hydraulic cylinder 16 is divided into a rodless cavity and a rod chamber by the piston rod. The piston rod is a hollow cylindrical structure. The inner cavity of the piston rod communicates with the rodless cavity. Two rodless cavity oil ports (rodless cavity port 1 and rodless cavity port 2 602) are symmetrically located on the sidewall of the cylinder body. The cylinder body also has a rod chamber oil port. The end of the piston rod outside the cylinder body is provided with an oil port 601 that communicates with the inner cavity of the piston rod. Hydraulic cylinder 22 has the same structure as hydraulic cylinder 16. The inner cavity of hydraulic cylinder 22 is divided into a rodless cavity and a rod chamber by the piston rod. The piston rod is a hollow cylindrical structure. The inner cavity of the piston rod communicates with the rodless cavity. Two rodless cavity oil ports (rodless cavity port 1 and rodless cavity port 2 2202) are symmetrically located on the sidewall of the cylinder body. The cylinder body also has a rod chamber oil port. The end of the piston rod outside the cylinder body is provided with an oil port 2201 that communicates with the inner cavity of the piston rod. The hydraulic cylinder structure employed in this invention is simple, enabling both expansion and contraction of the cylinder and the delivery of hydraulic oil to hydraulic mechanisms outside the cylinder, thereby simplifying the layout of the hydraulic piping within the suction and drainage control components of the emergency water supply and drainage vehicle. Furthermore, given the rapid rise in hydraulic oil temperature during prolonged operation of the water pump, system water cooling is employed to cool the oil in the hydraulic control circuit. This significantly improves system stability and product lifespan, while also significantly reducing manufacturing costs and enhancing the overall aesthetics of the product.

[0025] Control component 2 includes a main hydraulic pump P2, an auxiliary hydraulic pump P1, and a 2 / 4-way reversing valve 13, a 2 / 2-way solenoid valve 18, a 2 / 2-way solenoid valve 29, a 2 / 2-way solenoid valve 310, a 2 / 2-way solenoid valve 411, a 2 / 2-way solenoid valve 512, a 2 / 2-way solenoid valve 619, a 2 / 2-way solenoid valve 720, a 2 / 2-way solenoid valve 821, a check valve 1401, a check valve 2 1402, a safety valve 15, a remote pressure regulating valve 16, and an unloading reversing valve 17, located on the hydraulic pipelines between the main hydraulic pumps P2 and P1 and the multi-function hydraulic cylinder 16 and multi-function hydraulic cylinder 22. The unloading reversing valve 17 is connected between the oil outlet of the auxiliary hydraulic pump P1 and the fuel tank. The remote pressure regulating valve 16 and the safety valve 15 are connected between the oil outlet of the main hydraulic pump P2 and the fuel tank.

[0026] The main hydraulic pump P2 is connected to the engine of the water supply and drainage rescue vehicle chassis. The auxiliary hydraulic pump P1 is connected to the transmission of the water supply and drainage rescue vehicle chassis. The main hydraulic pump P2 and the auxiliary hydraulic pump P1 do not operate at the same time.

[0027] Auxiliary hydraulic pump P1 is connected to 2 / 2-way solenoid valve 29 via check valve 1401 and 2 / 4-way directional valve 13. The oil outlet of auxiliary hydraulic pump P1 is connected to the oil inlet of check valve 1401 via a hydraulic pipeline. The oil outlet of check valve 1401 is connected to port P of 2 / 4-way directional valve 13 via a hydraulic pipeline. Port A of 2 / 4-way directional valve 13 is connected to port P of 2 / 2-way solenoid valve 29 via a hydraulic pipeline. Port A of 2 / 2-way solenoid valve 29 is connected to port B of dual-hydraulic-controlled check valve 71 and port P of 2 / 2-way solenoid valve 8 via a hydraulic pipeline. Port B1 of dual-hydraulic-controlled check valve 71 is connected to rodless chamber port 1 of hydraulic cylinder 6 via a hydraulic pipeline. Port 601 of hydraulic cylinder 6 is connected to working port 51 of hydraulic motor 5 via a hydraulic pipeline.

[0028] The rodless chamber oil port 2 602 of hydraulic cylinder 16 is connected to the main hydraulic pump P2 via a 2-position 2-way solenoid valve 4 11 and a check valve 2 1402. Port A of the 2-position 2-way solenoid valve 4 11 is connected to the rodless chamber oil port 2 602 of hydraulic cylinder 16 via a hydraulic pipeline. Port P of the 2-position 2-way solenoid valve 4 11 is connected to the oil outlet of check valve 2 1402, the oil outlet of check valve 1 1401, and port P of the 2-position 4-way reversing valve 13 via a hydraulic pipeline. The oil inlet of the check valve 2 1402 is connected to the oil outlet of the main hydraulic pump P2 via a hydraulic pipeline. Port A of the 2-position 2-way solenoid valve 5 12 is connected to the rodless chamber oil port 2 602 of hydraulic cylinder 16 via a hydraulic pipeline. Port P of the 2-position 2-way solenoid valve 5 12 is connected to port B of the 2-position 4-way reversing valve 13 via a hydraulic pipeline. Port T of the 2-position 4-way reversing valve 13 is connected to the oil tank via a hydraulic pipeline.

[0029] Port A1 of the dual-hydraulic-controlled check valve 71 is connected to the rod chamber oil port of hydraulic cylinder 6 via a hydraulic pipeline. Port A of the dual-hydraulic-controlled check valve 71 is connected to port P of the 2-position, 2-way solenoid valve 821. Port A of the 2-position, 2-way solenoid valve 821 is connected to port B of the 2-position, 4-way reversing valve 13 via a hydraulic pipeline.

[0030] A 2-position, 2-way solenoid valve 720, used to quickly extend the piston rods of hydraulic cylinders 1 and 2, is connected in parallel with a 2-position, 2-way solenoid valve 29. Port A of 2-position, 2-way solenoid valve 720 is connected to port A of 2-position, 2-way solenoid valve 29, port B of dual-hydraulic-controlled check valve 171, and port P of 2-position, 2-way solenoid valve 18 via hydraulic piping. Port P of 2-position, 2-way solenoid valve 720 is connected to port A of 2-position, 4-way reversing valve 13 via hydraulic piping.

[0031] Port A of the 2-position 2-way solenoid valve 18 is connected to port B of the dual-hydraulic-controlled check valve 272 via a hydraulic pipeline. Port B1 of the dual-hydraulic-controlled check valve 272 is connected to port 1 of the rodless chamber of hydraulic cylinder 22 via a hydraulic pipeline. Rodless chamber port 2202 of hydraulic cylinder 22 is connected to the oil tank via the 2-position 2-way solenoid valve 310. Port A of the dual-hydraulic-controlled check valve 272 is connected to port P of the 2-position 2-way solenoid valve 821 via a hydraulic pipeline. Port A1 of the dual-hydraulic-controlled check valve 272 is connected to the rod chamber port of hydraulic cylinder 22 via a hydraulic pipeline. Port 2201 of hydraulic cylinder 22 is connected to working port 252 of hydraulic motor 5 via a hydraulic pipeline.

[0032] A 2-position, 2-way solenoid valve 619, used to quickly retract the piston rods of hydraulic cylinders 1 and 2, is connected in parallel with a 2-position, 2-way solenoid valve 821. Port P of 2-position, 2-way solenoid valve 619 is connected via hydraulic piping to port A of dual-hydraulic-controlled check valve 272, port A of dual-hydraulic-controlled check valve 171, and port P of 2-position, 2-way solenoid valve 821. Port A of 2-position, 2-way solenoid valve 619 is connected via hydraulic piping to port B of 2-position, 4-way reversing valve 13.

[0033] The working process of the hydraulic control system of the present invention is as follows:

[0034] The oil outlet of main hydraulic pump P2 is connected via check valve 2 1402 and hydraulic piping to port P of 2 / 2-way solenoid valve 4 11 and 2 / 2-way solenoid valve 5 12. It is then connected via port A to rodless chamber port 2 602 of hydraulic cylinder 1 6. Hydraulic oil flows through the inner cavity passage of the piston rod of hydraulic cylinder 1 6, port 601, and working port 1 51 of hydraulic motor 5, achieving forward rotation of the water pump. Simultaneously, the hydraulic oil is connected to the oil tank via working port 2 52 of hydraulic motor 5, port 2201 of hydraulic cylinder 2 22, the inner cavity passage of the piston rod, rodless chamber port 2 2202 of hydraulic cylinder 2 22, port P of 2 / 2-way solenoid valve 3 10, and port A.

[0035] The oil outlet of the auxiliary hydraulic pump P1 drives the piston rods of the hydraulic cylinder 16 and the hydraulic cylinder 22 to extend through the one-way valve 1401, the hydraulic pipeline, the two-position four-way reversing valve 13 port A, the two-position two-way solenoid valve 29 port P and port A, the two-position two-way solenoid valve 720 port P and port A, the double-hydraulic-controlled one-way valve 171 ports B and B1, the two-position two-way solenoid valve 18, and the double-hydraulic-controlled one-way valve 272 ports B and B1.

[0036] The oil outlet of the auxiliary hydraulic pump P1 drives the piston rods of the hydraulic cylinder 1 6 and the hydraulic cylinder 2 22 to retract through the one-way valve 1401, the hydraulic pipeline, the two-position four-way reversing valve 13 port B, the two-position two-way solenoid valve 8 port P and port A, the two-position two-way solenoid valve 6 port 19 port P and port A, the double-hydraulic control one-way valve 1 71 port A and A1, and the double-hydraulic control one-way valve 2 72 port A and A1.

[0037] The main hydraulic pump P2 and the auxiliary hydraulic pump P1 do not operate at the same time.

[0038] Part 2, control process.

[0039] Auxiliary hydraulic pump P1 applies pressure, controlling the extension of hydraulic cylinders 1 and 2. Using an anti-interference control principle, this not only controls the sequence of action of functional components but also ensures the proper operation of the pump's drive motor, thereby ensuring smooth startup of the hydraulic motor and the safety of the pump. After its actuators have completed their movement, auxiliary hydraulic pump P1 unloads.

[0040] Turn off the car engine, turn off the "auxiliary hydraulic pump P1 switch", turn on the "water pump switch", press the "engine start button", turn on the "PTO switch", start the main hydraulic pump P2, press the "water pump forward" button, and slowly rotate the handle of the remote pressure regulating valve 16 on the water pump control block to slowly increase the water pump oil pressure until the water pump reaches a pressure that matches the engine speed.

[0041] By controlling the two-position two-way solenoid valve 1 8, two-position two-way solenoid valve 2 9, two-position two-way solenoid valve 3 10, two-position two-way solenoid valve 4 11, two-position two-way solenoid valve 5 12, two-position four-way reversing valve 13 and hydraulic cylinder 1 and hydraulic cylinder 2 in component 2, the forward and reverse rotation of the drive motor 5 of the water pump 4 is realized, thereby controlling the forward and reverse rotation of the water pump 4 and completing the suction and drainage work of the system.

[0042] After the drainage work is completed, slowly rotate the handle of the remote pressure regulating valve 16 of the water pump control block to steadily reduce the water pump oil pressure until the oil pressure reaches 0, turn off the "PTO switch", and stabilize the engine at idle speed. Press and hold the engine stop button until the engine is completely shut down. At this time, the dual pump and motor-driven water pump suction and drainage hydraulic control system work is completed.

Claims

1. A dual pump and motor driven water pump suction and drainage hydraulic control system, characterized by: It consists of interconnected functional components and control components; The functional components include a hydraulic cylinder 1 (6), a hydraulic cylinder 2 (22), and a hydraulic motor (5) for driving a water pump (4); The inner cavity of the hydraulic oil cylinder (6) is divided into a rodless cavity and a rod cavity through the piston rod; the piston rod is a hollow cylindrical structure; the inner cavity of the piston rod is connected to the rodless cavity; two rodless cavity oil ports are symmetrically provided on the cylinder body; a rod cavity oil port is also provided on the cylinder body; the end of the piston rod outside the cylinder body is provided with an oil port (601) connected to the inner cavity of the piston rod; The hydraulic cylinder 2 (22) has the same structure as the hydraulic cylinder 1 (6); The control component includes a main hydraulic pump P2, an auxiliary hydraulic pump P1, and a two-position four-way reversing valve (13), a two-position two-way solenoid valve (8), a two-position two-way solenoid valve (9), a two-position two-way solenoid valve (10), a two-position two-way solenoid valve (4) (11), a two-position two-way solenoid valve (5) (12), and a two-position two-way solenoid valve (8) (21) arranged on the hydraulic pipeline between the main hydraulic pump P2, the auxiliary hydraulic pump P1 and the hydraulic cylinder 1 (6), the hydraulic cylinder 2 (22); the main hydraulic pump P2 is connected to the chassis engine by transmission; the auxiliary hydraulic pump P1 is connected to the chassis gearbox by transmission; the main hydraulic pump P2 and the auxiliary hydraulic pump P1 do not work at the same time; The auxiliary hydraulic pump P1 is connected to the two-position two-way solenoid valve 2 (9) via the one-way valve 1 (1401) and the two-position four-way reversing valve (13); the oil outlet of the auxiliary hydraulic pump P1 is connected to the oil inlet of the one-way valve 1 (1401) via a hydraulic pipeline; the oil outlet of the one-way valve 1 (1401) is connected to the port P of the two-position four-way reversing valve (13) via a hydraulic pipeline; the port A of the two-position four-way reversing valve (13) is connected to the port P of the two-position two-way solenoid valve 2 (9) via a hydraulic pipeline; the port A of the two-position two-way solenoid valve 2 (9) is connected to the port B of the double-hydraulic one-way valve 1 (71) and the port P of the two-position two-way solenoid valve 1 (8) via a hydraulic pipeline; the port B1 of the double-hydraulic one-way valve 1 (71) is connected to the rodless chamber oil port 1 of the hydraulic cylinder 1 (6) via a hydraulic pipeline; The oil port (601) of the hydraulic cylinder (6) is connected to the working oil port (51) of the hydraulic motor (5) via a hydraulic pipeline; The oil port 2 (602) of the rodless chamber of the hydraulic cylinder 1 (6) is connected to the main hydraulic pump P2 through the two-position two-way solenoid valve 4 (11) and the one-way valve 2 (1402); the port A of the two-position two-way solenoid valve 4 (11) is connected to the oil port 2 (602) of the rodless chamber of the hydraulic cylinder 1 (6) through the hydraulic pipeline; the port P of the two-position two-way solenoid valve 4 (11) is connected to the oil outlet of the one-way valve 2 (1402), the oil outlet of the one-way valve 1 (1401), the two-position four-way reversing valve (13 ) port P is connected via a hydraulic pipeline; the oil inlet of the one-way valve 2 (1402) is connected to the oil outlet of the main hydraulic pump P2 via a hydraulic pipeline; the port A of the two-position two-way solenoid valve 5 (12) is connected to the oil port 2 (602) of the rodless chamber of the hydraulic cylinder 1 (6) via a hydraulic pipeline; the port P of the two-position two-way solenoid valve 5 (12) is connected to the port B of the two-position four-way reversing valve (13) via a hydraulic pipeline; the port T of the two-position four-way reversing valve (13) is connected to the oil tank via a hydraulic pipeline; The port A1 of the double-hydraulic-controlled one-way valve (71) is connected to the oil port of the rod chamber of the hydraulic cylinder (6) via a hydraulic pipeline; the port A of the double-hydraulic-controlled one-way valve (71) is connected to the port P of the two-position two-way solenoid valve (21); the port A of the two-position two-way solenoid valve (21) is connected to the port B of the two-position four-way reversing valve (13) via a hydraulic pipeline; The port A of the two-position two-way solenoid valve (8) is connected to the port B of the two-hydraulic one-way valve (72) via a hydraulic pipeline; the port B1 of the two-hydraulic one-way valve (72) is connected to the rodless chamber oil port one of the hydraulic cylinder (22) via a hydraulic pipeline; the rodless chamber oil port two (2202) of the hydraulic cylinder (22) is connected to the oil tank via the two-position two-way solenoid valve (10); the port A of the two-hydraulic one-way valve (72) is connected to the port P of the two-position two-way solenoid valve (21) via a hydraulic pipeline; the port A1 of the two-hydraulic one-way valve (72) is connected to the rod chamber oil port of the hydraulic cylinder (22) via a hydraulic pipeline; the oil port (2201) of the hydraulic cylinder (22) is connected to the working oil port two (52) of the hydraulic motor (5) via a hydraulic pipeline.

2. The dual-pump and motor-driven water pump suction and drainage hydraulic control system according to claim 1, characterized in that: It also includes a remote pressure regulating valve (16) and a safety valve (15) connected between the oil outlet of the main hydraulic pump P2 and the oil tank.

3. The dual-pump and motor-driven water pump suction and drainage hydraulic control system according to claim 1, characterized in that: It also includes a two-position two-way solenoid valve seven (20) connected in parallel with the two-position two-way solenoid valve two (9) for quickly extending the piston rods of the hydraulic cylinder one and two; the two-position two-way solenoid valve seven (20) port A is connected to the two-position two-way solenoid valve two (9) port A, the double-hydraulic one-way valve one (71) port B, and the two-position two-way solenoid valve one (8) port P through a hydraulic pipeline; the two-position two-way solenoid valve seven (20) port P is connected to the two-position four-way reversing valve (13) port A through a hydraulic pipeline.

4. The dual-pump and motor-driven water pump suction and drainage hydraulic control system according to claim 1, characterized in that: It also includes a two-position two-way solenoid valve six (19) connected in parallel with the two-position two-way solenoid valve eight (21) for quickly retracting the first and second piston rods of the hydraulic cylinder; the two-position two-way solenoid valve six (19) port P is connected to the double-hydraulic control check valve two (72) port A, the double-hydraulic control check valve one (71) port A, and the two-position two-way solenoid valve eight (21) port P through a hydraulic pipeline; the two-position two-way solenoid valve six (19) port A is connected to the two-position four-way reversing valve (13) port B through a hydraulic pipeline.

5. The dual-pump and motor-driven water pump suction and drainage hydraulic control system according to claim 1, characterized in that: It also includes an unloading reversing valve (17) connected between the oil outlet of the auxiliary hydraulic pump P1 and the oil tank.

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