A steering and lifting mobile hydraulic system for a shipbuilding berth trolley

Abstract

The utility model relates to a kind of steering lifting mobile hydraulic system for berth trolley, it is related to the technical field of hydraulic control system of berth, including oil tank, electric pump unit, jacking cylinder, lifting cylinder, rotary cylinder, drive assembly and control module, oil tank is supplied oil by oil supply pipeline, jacking cylinder, lifting cylinder and rotary cylinder are returned to oil tank by oil return pipeline. The longitudinal beam of the ship body is connected with the berth trolley, the jacking cylinder supports the main beam of the ship body, the lifting cylinder supports the berth trolley, the rotary cylinder drives the lifting cylinder to rotate, when receiving action signal, control module controls jacking cylinder to rise or drop to predetermined position and lock;When receiving steering signal, control module controls lifting cylinder to lift the berth trolley, and controls the rotary cylinder to steer to predetermined position, to provide the multi-degree-of-freedom adjustment of ship, total section, subsection in this way, to improve the work efficiency of the berth trolley.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control system technology for shipyards, and in particular to a steering, lifting and moving hydraulic system for a shipyard trolley. Background Technology

[0002] The hydraulic slipway trolley is a device that meets the construction mode of "flat-ground shipbuilding + semi-submersible barge launching". It has walking, lifting, centering and lateral movement functions. It can be used alone or in combination with modular vehicles. The number of teams can be adjusted in real time according to the needs of different tonnage hulls, so that the speed of ship movement and launching can be significantly improved. It is suitable for rapid transportation and precise docking of hull construction.

[0003] In related technologies, one can refer to the Chinese utility model patent with authorization announcement number CN220667973U, which discloses a servo-controlled CNC centering hydraulic system for a whole section, applied to a shipyard trolley, including an oil tank, a motor pump group, a pressure filter, a pressure gauge, a servo control valve group, a return oil filter, a vertical lifting cylinder and a horizontal lateral moving cylinder.

[0004] The motor pump unit is connected to the oil tank and is connected to the pressure filter, servo control valve group, vertical lifting cylinder and horizontal traverse cylinder through pipelines; the servo control valve group includes a proportional servo valve, solenoid directional valve, relief valve and hydraulic lock integrated on the block, and the servo control valve group is connected to the return oil filter and oil tank through pipelines; the pressure set by the relief valve in the servo control valve group determines the maximum pressure of the overall CNC centering hydraulic system.

[0005] When an action signal is received, the hydraulic system's control module controls the vertical lifting cylinder to rise or fall to a predetermined position and lock it, and controls the horizontal traverse cylinder to move to a set position and lock it, completing the alignment and closing of the contact axes of the main section, sub-sections and reference section, as well as the overall adjustment of the ship's position and attitude.

[0006] Although the aforementioned hydraulic system can adjust the forward and backward movement, vertical movement, and horizontal movement of the trolley, it cannot enable the trolley to turn. This reduces the trolley's ease of adjusting the ship's position and attitude, and consequently reduces its working efficiency. Utility Model Content

[0007] To improve the working efficiency of the slipway trolley, this utility model provides a hydraulic system for steering, lifting and moving the slipway trolley.

[0008] This application provides a steering, lifting, and moving hydraulic system for a shipyard trolley, which adopts the following technical solution:

[0009] A hydraulic system for steering, lifting, and moving a trolley on a shipyard includes an oil tank, an electric pump unit, a lifting cylinder, a hoisting cylinder, a rotating cylinder, a drive assembly, and a control module. The oil tank supplies oil to the lifting cylinder, hoisting cylinder, and rotating cylinder via a supply pipeline. The electric pump unit is located on the supply pipeline. The lifting cylinder, hoisting cylinder, and rotating cylinder return oil to the oil tank via a return pipeline. The oil tank, supply pipeline, lifting cylinder, hoisting cylinder, rotating cylinder, and return pipeline form a complete hydraulic circuit system. The actuator is located on the oil supply line and is used to control the direction of the oil flow. The control module is used to control the operation of the motor pump group, lifting cylinder, hoisting cylinder, rotating cylinder and drive assembly. When an action signal is received, the control module controls the lifting cylinder to rise or fall to a predetermined position and lock it based on the action signal. When a steering signal is received, the control module controls the hoisting cylinder to lift the trolley based on the steering signal and controls the rotating cylinder to turn to a predetermined position to complete the steering function of the trolley.

[0010] By adopting the above technical solution, the slipway trolley is connected to the longitudinal beams of the hull. The lifting cylinder supports the main beam of the hull, the hoisting cylinder supports the slipway trolley, and the rotary cylinder drives the hoisting cylinder to rotate. When an action signal is received, the motor pump unit supplies oil through the oil supply pipeline. The control module controls the lifting cylinder to rise or fall to a predetermined position and lock it based on the action signal. When the system receives a steering signal, the control module controls the hoisting cylinder to lift the slipway trolley and controls the rotary cylinder to turn to a predetermined position, causing the rotary cylinder to rotate. This enables the trolley to perform steering functions, thereby achieving position and attitude adjustments for the ship, main sections, and sub-sections, as well as CNC alignment of the main sections and sub-sections. It can ensure that the contact axes of the main sections, sub-sections, and reference sections are precisely aligned during alignment. In addition, it can perform overall adjustments to the position and attitude of the entire ship, achieving horizontal and centerline adjustments. Multiple trolleys work together, with the trolleys hinged to the longitudinal beams and arranged symmetrically on both sides. Through centralized computer control, the relative positions of the main and longitudinal beams are changed, providing multi-degree-of-freedom adjustments for the ship, main sections, and sub-sections, thus improving the working efficiency of the trolley on the slipway.

[0011] Optionally, the drive assembly includes a proportional servo valve and a solenoid directional valve. The proportional servo valve is located on the oil supply line and is used to control the direction of the oil flow. The solenoid directional valve is located on the oil supply line and is used to control the direction of the oil flow to the proportional servo valve.

[0012] Optionally, the proportional servo valve includes a first proportional valve, a second proportional valve, and a third proportional valve. The valve port of the electromagnetic directional valve is connected to a lifting pipeline and a lifting rotation pipeline. The first proportional valve is located on the lifting pipeline and connected to the return oil pipeline and corresponds to the lifting cylinder. The second proportional valve is located on the lifting rotation pipeline and connected to the return oil pipeline and corresponds to the lifting cylinder. The third proportional valve is located on the lifting rotation pipeline and connected to the return oil pipeline and corresponds to the rotation cylinder. The electromagnetic directional valve is used to control the flow of oil to the first proportional valve, the second proportional valve, or the third proportional valve.

[0013] By adopting the above technical solutions, the electromagnetic reversing valve controls the flow of oil to the jacking pipeline or the lifting and rotating pipeline, and the proportional servo valve controls the flow of oil to the first proportional valve, the second proportional valve or the third proportional valve, thereby controlling the support, jacking, lifting and rotating actions of the hull, thereby realizing multi-degree-of-freedom adjustment of the ship, the main section and the sub-section, and improving the working efficiency of the slipway trolley.

[0014] Optionally, the first proportional valve is connected to the rodless chamber of the lifting cylinder via a first pipeline, and the first proportional valve is connected to the rod chamber of the lifting cylinder via a second pipeline. Both the first and second pipelines are equipped with hydraulic locks, and both the first and second pipelines are equipped with oil return pipelines connected to the return oil pipeline. The oil return pipelines are connected to the first and second pipelines, and the connection point is located between the hydraulic lock and the lifting cylinder. The first proportional valve and the hydraulic lock are used to control the oil entering the rod chamber or the rodless chamber of the lifting cylinder.

[0015] By adopting the above technical solution, the motor pump unit starts, the electromagnetic reversing valve is energized and controls the first proportional valve to start. The first proportional valve causes the hydraulic lock on the first pipeline to open, and the oil enters the rodless chamber of the lifting cylinder through the first pipeline, thereby pushing the piston rod of the lifting cylinder to move. Conversely, the oil enters the rod chamber of the lifting cylinder through the second pipeline, thereby pushing the piston rod of the lifting cylinder to move back. The oil flows back to the oil tank through the oil return pipeline and the oil return pipeline, thereby realizing the support of the hull and the adjustment of the lifting height.

[0016] Optionally, the second proportional valve is connected to the rodless chamber of the lifting cylinder via a third pipeline, the second proportional valve is connected to the rod chamber of the lifting cylinder via a fourth pipeline, the third proportional valve is connected to the left chamber of the rotary cylinder via a fifth pipeline, and the third proportional valve is connected to the right chamber of the rotary cylinder via a sixth pipeline. Each of the third, fourth, fifth, and sixth pipelines is equipped with a check valve and a hydraulic lock.

[0017] By adopting the above technical solution, the motor pump unit starts, the electromagnetic reversing valve is energized and controls the second proportional valve to start. The second proportional valve causes the hydraulic lock on the third pipeline to open, and the oil enters the rodless chamber of the lifting cylinder through the fourth pipeline and the check valve, and vice versa. The third proportional valve is energized and causes the hydraulic lock on the fifth pipeline to open, and the oil enters the left oil chamber of the rotating cylinder through the fifth pipeline and the check valve, and vice versa. The used oil flows back to the oil tank through the return oil pipeline, thereby realizing the support of the longitudinal beams of the hull and the adjustment of the lifting height and rotation angle.

[0018] Optionally, the oil return line is equipped with an overflow valve, and the pressure set by the overflow valve determines the maximum pressure of the steering lifting and moving hydraulic system.

[0019] By adopting the above technical solution, the relief valve allows the fluid in the system to be discharged or returned to the oil tank when the set pressure is reached, so as to prevent the system from being over-pressured.

[0020] Optionally, the lifting and rotating pipeline is equipped with a balance valve and a throttle valve, wherein the balance valve determines the maximum pressure of the lifting cylinder and the rotating cylinder in the steering and lifting hydraulic system.

[0021] By adopting the above technical solution, the balancing valve balances the pressure on both sides, and in conjunction with the throttle valve, improves the stability of the system pressure.

[0022] Optionally, a return oil filter is provided on the return oil pipeline.

[0023] By adopting the above technical solution, the return oil filter filters the return oil in the return oil pipeline, preventing contaminants from flowing back into the oil tank, thereby maintaining the cleanliness and stable operation of the hydraulic system.

[0024] Optionally, the control module is connected to an external computer for centralized control. When the steering, lifting, and moving hydraulic system is in automatic control mode, the motor pump group, lifting cylinder, hoisting cylinder, rotating cylinder, and drive components are operated remotely.

[0025] Optionally, when the steering and lifting hydraulic system is in manual mode, the motor pump unit, lifting cylinder, hoisting cylinder, rotating cylinder and drive assembly can be manually controlled to operate.

[0026] By adopting the above technical solution, the hydraulic system can be controlled automatically or manually, thereby improving the applicability of the hydraulic system.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The slipway trolley is connected to the longitudinal beams of the hull. Lifting cylinders support the main beams of the hull, while hoisting cylinders support the slipway trolley. Rotary cylinders drive the hoisting cylinders to rotate. When an action signal is received, the motor pump unit supplies oil through the oil supply line. The control module, based on the action signal, controls the lifting cylinders to rise or fall to a predetermined position and locks them. When the system receives a steering signal, the control module, based on the steering signal, controls the hoisting cylinders to lift the slipway trolley and controls the rotary cylinders to turn to a predetermined position. The rotary cylinders then drive the hoisting cylinders to rotate, thus completing the trolley's rotation. The trolley's steering function enables the adjustment of the position and attitude of the ship, main sections, and sub-sections, as well as the CNC alignment of the main sections and sub-sections. It can ensure that the contact axes of the main sections, sub-sections, and reference sections are precisely aligned during alignment. In addition, it can make overall adjustments to the position and attitude of the entire ship, achieving horizontal and centerline adjustments. Multiple trolleys work together, with the trolleys hinged to the longitudinal beams and arranged symmetrically on both sides. Through centralized computer control, the relative positions of the main and longitudinal beams are changed, thus providing multi-degree-of-freedom adjustments for the ship, main sections, and sub-sections, thereby improving the working efficiency of the trolleys on the slipway. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this application.

[0030] Reference numerals: 1. Oil tank; 11. Oil supply line; 12. Pressure filter; 2. Motor pump unit; 3. Lifting cylinder; 31. First line; 32. Second line; 33. Return line; 331. Relief valve; 4. Lifting cylinder; 41. Third line; 42. Fourth line; 5. Rotary cylinder; 51. Fifth line; 52. Sixth line; 6. Drive assembly; 61. Proportional servo valve; 611. First proportional valve; 612. Second proportional valve; 613. Third proportional valve; 62. Solenoid directional valve; 63. Lifting line; 64. Lifting and rotating line; 65. Balance valve; 66. Throttle valve; 7. Check valve; 71. One-way throttle valve; 8. Return line; 81. Return filter; 9. Hydraulic lock. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0032] This application discloses a steering, lifting, and moving hydraulic system for a shipyard trolley.

[0033] Reference Figure 1A hydraulic system for steering, lifting, and moving a shipyard trolley includes an oil tank 1, a motor pump unit 2, a lifting cylinder 3, a hoisting cylinder 4, a rotating cylinder 5, a drive assembly 6, and a control module integrated on the shipyard trolley. The oil tank 1 supplies oil to the lifting cylinder 3, the hoisting cylinder 4, and the rotating cylinder 5 via an oil supply pipeline 11. An air filter is installed on the oil tank 1. The motor pump unit is located on the oil supply pipeline 11, and a check valve 7 is installed on the oil supply pipeline 11. Pressure filter 12, lifting cylinder 3, lifting cylinder 4 and rotating cylinder 5 return oil to oil tank 1 through return oil line 8. Oil tank 1, oil supply line 11, lifting cylinder 3, lifting cylinder 4, rotating cylinder 5 and return oil line 8 form a complete oil circuit system. Drive component 6 is located on oil supply line 11 and is used to control the direction of oil flow. Control module is used to control the operation of motor pump group 2, lifting cylinder 3, lifting cylinder 4, rotating cylinder 5 and drive component 6.

[0034] Reference Figure 1 There are multiple trolleys on the slipway, all of which are connected to the longitudinal beams of the hull. The multiple trolleys are arranged symmetrically on the left and right. The lifting cylinder 3 supports the main beam of the hull, the lifting cylinder 4 supports the trolleys, and when the piston rod of the rotating cylinder 5 rotates, it drives the lifting cylinder 4 to rotate, thereby driving the longitudinal beam to move and align with the main beam.

[0035] Reference Figure 1 The drive assembly 6 includes a proportional servo valve 61 and a solenoid directional valve 62. The proportional servo valve 61 is located on the oil supply line 11 and is used to control the direction of the oil flow. The solenoid directional valve 62 is located on the oil supply line 11 and is used to control the direction of the oil flow to the proportional servo valve 61.

[0036] Reference Figure 1 The proportional servo valve 61 includes a first proportional valve 611, a second proportional valve 612, and a third proportional valve 613. The valve port of the solenoid directional valve 62 is connected to a lifting pipeline 63 and a lifting rotation pipeline 64. The first proportional valve 611 is located on the lifting pipeline 63 and is connected to the return oil pipeline 8 and corresponds to the lifting cylinder 3. The second proportional valve 612 and the third proportional valve 613 are both located on the lifting rotation pipeline 64 and are connected to the return oil pipeline 8. The second proportional valve 612 corresponds to the lifting cylinder 4, and the third proportional valve 613 corresponds to the rotation cylinder 5. The first proportional valve 611, the second proportional valve 612, and the third proportional valve 613 are all four-way proportional valves. The solenoid directional valve 62 is used to control the flow of oil to the first proportional valve 611, the second proportional valve 612, or the third proportional valve 613.

[0037] Reference Figure 1The first proportional valve 611 is connected to the rodless chamber of the lifting cylinder 3 via a first pipeline 31, and the first proportional valve 611 is connected to the rod chamber of the lifting cylinder 3 via a second pipeline 32. Both the first pipeline 31 and the second pipeline 32 are equipped with hydraulic locks 9. Both the first pipeline 31 and the second pipeline 32 are equipped with oil return pipelines 33 connected to the return oil pipeline 8. The oil return pipeline 33 is connected to the first pipeline 31 and the second pipeline 32, and the connection point is located between the hydraulic lock 9 and the lifting cylinder 3. The first proportional valve 611 and the hydraulic lock 9 are used to control the oil entering the rod chamber or the rodless chamber of the lifting cylinder 3.

[0038] Reference Figure 1 The second proportional valve 612 is connected to the rodless chamber of the lifting cylinder 4 via a third pipeline 41, the second proportional valve 612 is connected to the rod chamber of the lifting cylinder 4 via a fourth pipeline 42, the third proportional valve 613 is connected to the left oil chamber of the rotary cylinder 5 via a fifth pipeline 51, and the third proportional valve 613 is connected to the right oil chamber of the rotary cylinder 5 via a sixth pipeline 52. Each of the third pipeline 41, the fourth pipeline 42, the fifth pipeline 51, and the sixth pipeline 52 is equipped with a check valve 7 and a hydraulic lock 9, and the check valve 7 located on the third pipeline 41, the fourth pipeline 42, the fifth pipeline 51, and the sixth pipeline 52 is a one-way throttle valve 71.

[0039] Reference Figure 1 The oil return line 33 is equipped with an overflow valve 331. The pressure set by the overflow valve 331 determines the maximum pressure of the steering lifting and moving hydraulic system. The lifting and rotating line 64 is equipped with a balance valve 65 and a throttle valve 66. The balance valve 65 determines the maximum pressure of the lifting cylinder 4 and the rotating cylinder 5 in the steering lifting and moving hydraulic system. The oil return line 8 is equipped with an oil return filter 81.

[0040] Reference Figure 1 The control module is connected to an external computer for centralized control. When the steering, lifting and moving hydraulic system is in automatic control mode, the motor pump group 2, lifting cylinder 3, hoisting cylinder 4, rotating cylinder 5, proportional servo valve 61 and solenoid directional valve 62 are operated by remote control. The computer's centralized control causes the main and longitudinal beams to change relative positions, thereby providing multi-degree-of-freedom adjustment of the ship, main section and subsection, thus improving the working efficiency of the slipway trolley.

[0041] Reference Figure 1 In other feasible embodiments, the steering and lifting hydraulic system is in manual mode, and the motor pump group 2, lifting cylinder 3, hoisting cylinder 4, rotating cylinder 5, proportional servo valve 61 and solenoid directional valve 62 are operated manually.

[0042] Reference Figure 1 The working process of the hydraulic system in this embodiment is as follows:

[0043] 1. Brief description of the preparation process

[0044] 1) Fill fuel tank 1 with oil.

[0045] Check all valves and components on the automatic steering and lifting hydraulic system, open the air filter on oil tank 1 (not shown in the figure), and fill oil tank 1 with oil through the oil filter trolley until the oil level is set.

[0046] 2) Fill the lifting cylinder 3 with oil.

[0047] Start the motor pump unit 2, set the pressure of the overflow valve 331, energize the solenoid directional valve 62, energize the first proportional valve 611, and open the hydraulic lock 9 on the first pipeline 31. The oil enters the rodless chamber of the lifting cylinder 3 through the pressure filter 12, check valve 7, first proportional valve 611, hydraulic lock 9 and first pipeline 31. Conversely, the oil enters the rod chamber of the lifting cylinder 3 through the pressure filter 12, check valve 7, first proportional valve 611, hydraulic lock 9 and second pipeline 32.

[0048] 3) Fill lifting cylinder 4 with oil.

[0049] Start the motor pump unit 2, set the pressure of the overflow valve 331 and the balance valve 65, energize the solenoid directional valve 62, energize the second proportional valve 612, and open the hydraulic lock 9 on the third pipeline 41. The oil flows through the pressure filter 12, check valve 7, balance valve 65, throttle valve 66, second proportional valve 612, one-way throttle valve 71, hydraulic lock 9 and third pipeline 41 into the rodless chamber of the lifting cylinder 4. Conversely, the oil flows through the pressure filter 12, check valve 7, balance valve 65, throttle valve 66, second proportional valve 612, one-way throttle valve 71, hydraulic lock 9 and fourth pipeline 42 into the rod chamber of the lifting cylinder 4.

[0050] 4) Fill the rotary cylinder 5 with oil.

[0051] Start the motor pump unit 2, set the pressure of the overflow valve 331 and the balance valve 65, energize the solenoid directional valve 62, energize the third proportional valve 613, and open the hydraulic lock 9 on the fifth pipeline 51. The oil flows through the pressure filter 12, check valve 7, balance valve 65, throttle valve 66, third proportional valve 613, one-way throttle valve 71, hydraulic lock 9 and the fifth pipeline 51 into the left oil chamber of the rotary cylinder 5. Conversely, the oil flows through the pressure filter 12, check valve 7, balance valve 65, throttle valve 66, third proportional valve 613, one-way throttle valve 71, hydraulic lock 9 and the sixth pipeline 52 into the right oil chamber of the rotary cylinder 5.

[0052] 2. Brief description of the usage process

[0053] 1) Manual usage mode

[0054] Set the control mode in the control module to "manual" mode, manually start the motor pump group 2, open the solenoid reversing valve 62 to open the hydraulic lock 9, and switch the first proportional valve 611 to the rising position of the lifting cylinder 3. The lifting height of the supporting equipment can be controlled by manual operation. The second proportional valve 612 switches to the rising position of the lifting cylinder 4. The lifting height of the trolley can be controlled by manual operation. The third proportional valve 613 is energized to supply oil to the rodless chamber of the rotary cylinder 5. The rotation angle of the trolley can be controlled by manual operation. The oil flows back to the return oil line 8 through the oil return ports of the lifting cylinder 3, the lifting cylinder 4, and the rotary cylinder 5. The oil remaining in the oil return line 33 flows back to the return oil line 8. The oil remaining in the first line 31, the second line 32, the third line 41, the fourth line 42, the fifth line 51, and the sixth line 52 all flow back to the return oil line 8 for collection. The oil in the return oil line 8 flows back to the oil tank 1.

[0055] 2) Automatic usage mode

[0056] The control module is set to "automatic" mode. The motor pump unit 2 is remotely started via computer control, the solenoid reversing valve 62 is opened to unlock the hydraulic lock 9, the first proportional valve 611 is switched to the lifting position of the lifting cylinder 3, and the lifting height of the supporting equipment is adjusted remotely via the lifting cylinder 3; the second proportional valve 612 is switched to the lifting position of the lifting cylinder 4, and the lifting height of the trolley is adjusted remotely via the trolley; the third proportional valve 613 is energized to supply oil to the rodless chamber of the rotary cylinder 5, and the rotation angle of the trolley is adjusted manually via remote control. The oil flows back to the return oil line 8 through the oil return ports of the lifting cylinder 3, lifting cylinder 4 and rotary cylinder 5. The oil remaining in the oil return line 33 flows back to the return oil line 8. The oil remaining in the first line 31, the second line 32, the third line 41, the fourth line 42, the fifth line 51 and the sixth line 52 all flow back to the return oil line 8 for collection. The oil in the return oil line 8 flows back to the oil tank 1.

[0057] Multiple trolleys on the slipway can be used individually or linked together under the control of the operator's console. This enables the adjustment of the position and attitude of the ship, main sections, and sub-sections, as well as the CNC alignment of the main sections and sub-sections. It can ensure that the contact axes of the main sections, sub-sections, and reference sections are precisely aligned during alignment. In addition, it can make overall adjustments to the position and attitude of the entire ship, achieving horizontal and centerline adjustments. Multiple trolleys work together, with the trolleys hinged to the longitudinal beams and arranged symmetrically on both sides. Through centralized computer control, the relative positions of the main and longitudinal beams are changed, providing multi-degree-of-freedom adjustments for the ship, main sections, and sub-sections, thereby improving the working efficiency of the slipway trolleys.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulic system for steering, lifting, and moving a trolley on a shipyard, characterized in that: The system includes an oil tank (1), an electric pump unit, a lifting cylinder (3), a hoisting cylinder (4), a rotating cylinder (5), a drive assembly (6), and a control module. The oil tank (1) supplies oil to the lifting cylinder (3), the hoisting cylinder (4), and the rotating cylinder (5) through an oil supply pipeline (11). The electric pump unit is mounted on the oil supply pipeline (11). The lifting cylinder (3), the hoisting cylinder (4), and the rotating cylinder (5) return oil to the oil tank (1) through a return oil pipeline (8). The oil tank (1), the oil supply pipeline (11), the lifting cylinder (3), the hoisting cylinder (4), the rotating cylinder (5), and the return oil pipeline (8) form a complete system. The entire oil circuit system includes a drive assembly (6) located on the oil supply line (11) and used to control the direction of the oil flow. The control module is used to control the operation of the motor pump group (2), the lifting cylinder (3), the hoisting cylinder (4), the rotating cylinder (5), and the drive assembly (6). When an action signal is received, the control module controls the lifting cylinder (3) to rise or fall to a predetermined position and lock it based on the action signal. When a steering signal is received, the control module controls the hoisting cylinder (4) to lift the trolley based on the steering signal and controls the rotating cylinder (5) to turn to a predetermined position to complete the steering function of the trolley.

2. The hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 1, characterized in that: The drive assembly (6) includes a proportional servo valve (61) and an electromagnetic directional valve (62). The proportional servo valve (61) is located on the oil supply line (11) and is used to control the direction of the oil flow. The electromagnetic directional valve (62) is located on the oil supply line (11) and is used to control the flow of the oil to the proportional servo valve (61).

3. The hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 2, characterized in that: The proportional servo valve (61) includes a first proportional valve (611), a second proportional valve (612), and a third proportional valve (613). The valve port of the electromagnetic directional valve (62) is connected to a lifting pipeline (63) and a lifting rotation pipeline (64). The first proportional valve (611) is located on the lifting pipeline (63) and connected to the return oil pipeline (8) and corresponds to the lifting cylinder (3). The second proportional valve (612) is located on the lifting rotation pipeline (64) and connected to the return oil pipeline (8) and corresponds to the lifting cylinder (4). The third proportional valve (613) is located on the lifting rotation pipeline (64) and connected to the return oil pipeline (8) and corresponds to the rotation cylinder (5). The electromagnetic directional valve (62) is used to control the flow of oil to the first proportional valve (611), the second proportional valve (612), or the third proportional valve (613).

4. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 3, characterized in that: The first proportional valve (611) is connected to the rodless chamber of the lifting cylinder (3) through a first pipeline (31), and the first proportional valve (611) is connected to the rod chamber of the lifting cylinder (3) through a second pipeline (32). Both the first pipeline (31) and the second pipeline (32) are equipped with hydraulic locks (9). Both the first pipeline (31) and the second pipeline (32) are equipped with oil return pipelines (33) connected to the return oil pipeline (8). The oil return pipeline (33) is connected to the first pipeline (31) and the second pipeline (32), and the connection point is located between the hydraulic lock (9) and the lifting cylinder (3). The first proportional valve (611) and the hydraulic lock (9) are used to control the oil to enter the rod chamber or the rodless chamber of the lifting cylinder (3).

5. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 3, characterized in that: The second proportional valve (612) is connected to the rodless chamber of the lifting cylinder (4) via a third pipeline (41), the second proportional valve (612) is connected to the rod chamber of the lifting cylinder (4) via a fourth pipeline (42), the third proportional valve (613) is connected to the left oil chamber of the rotating cylinder (5) via a fifth pipeline (51), and the third proportional valve (613) is connected to the right oil chamber of the rotating cylinder (5) via a sixth pipeline (52). Each of the third pipeline (41), the fourth pipeline (42), the fifth pipeline (51), and the sixth pipeline (52) is equipped with a check valve (7) and a hydraulic lock (9).

6. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 4, characterized in that: The oil return line (33) is equipped with an overflow valve (331), and the pressure set by the overflow valve (331) determines the maximum pressure of the steering lifting and moving hydraulic system.

7. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 5, characterized in that: The lifting and rotating pipeline (64) is equipped with a balance valve (65) and a throttle valve (66). The balance valve (65) determines the maximum pressure of the lifting cylinder (4) and the rotating cylinder (5) in the steering and lifting moving hydraulic system.

8. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 1, characterized in that: The return oil pipeline (8) is equipped with a return oil filter (81).

9. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 1, characterized in that: The control module is connected to an external computer for centralized control. When the steering lifting and moving hydraulic system is in automatic control mode, the motor pump group (2), lifting cylinder (3), hoisting cylinder (4), rotating cylinder (5) and drive assembly (6) are operated remotely.

10. A hydraulic system for steering, lifting, and moving a trolley on a slipway according to claim 9, characterized in that: When the steering and lifting hydraulic system is in manual mode, the motor pump group (2), lifting cylinder (3), hoisting cylinder (4), rotating cylinder (5) and drive assembly (6) are operated manually.

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