Dismounting system for interference fit part of ship chamber working door of ship lift in narrow space and using method

Abstract

The invention provides a disassembly system for interference fit parts of a ship chamber working door of a ship lift in a narrow space and a use method. The system is formed by integrating a positioning module, a frame module, a hydraulic driving module and a hydraulic measurement and control module. The positioning module achieves centering and locking in the X direction, the Y direction and the Z direction, the frame module provides rigid counter-force supporting, the hydraulic driving module outputs continuous controllable drawing force, the measurement and control module collects force and displacement parameters in real time, and closed-loop control is achieved. The method solves the problems that a traditional method is narrow in space, difficult to center, prone to damaging equipment and the like, has the advantages of nondestructive disassembly, data driving, high adaptability and the like, and achieves rapid, accurate and safe disassembly operation. The device can be widely applied to the field of water conservancy and shipping equipment maintenance.

Description

Technical Field

[0001] This invention relates to the field of maintenance and repair technology for hydraulic and shipping engineering machinery and equipment, specifically to a disassembly system and method for the interference fit of the working door of a ship lift in a confined space. Background Technology

[0002] As a key piece of equipment in large-scale water conservancy projects and navigation structures, the safe and stable operation of ship lifts is of paramount importance. The ship lift's access door is the lifeline of the ship lift's cabins, and its reliability directly affects the overall efficiency and safety of the entire lift. This access door extensively utilizes interference-fit components such as pins, bushings, and bearings to achieve precise transmission and support. Under harsh conditions such as long-term exposure to enormous alternating loads and moisture erosion, these components are prone to wear, seizing, or failure, necessitating regular inspection and replacement.

[0003] Currently, for the dismantling of such large interference fit parts, especially in space-constrained conditions with large component sizes and high preload, the industry's conventional practices mainly include: 1) Hammering method: using tools such as sledgehammers and copper rods for manual hammering. This method is not only labor-intensive and inefficient, but also easily damages precision mating surfaces, adjacent components, and even the entire door structure, causing irreversible plastic deformation. 2) Thermal expansion and contraction method: using an oxyacetylene flame to heat the hole or using liquid nitrogen to cool the shaft. This method requires extremely high temperature control; improper operation can change the metallographic structure and mechanical properties of the metal material, and open flame operations in special environments such as high altitudes and underwater pose serious safety hazards. 3) Traditional hydraulic puller method: using large general-purpose hydraulic pullers. However, the maintenance space around the working door of the ship lift is usually extremely small, and traditional pullers are often too large and require additional operating space to be positioned or effectively used. Even if installation is possible, uneven force distribution on the push rods or pull claws often leads to severe off-center load problems, which may not only damage expensive components, but may even cause the hydraulic puller itself to break, resulting in a safety accident.

[0004] Furthermore, the existing disassembly process lacks precise force and displacement control. Operators rely heavily on experience and feel, making it impossible to monitor key parameters such as pressure and displacement in real time. This results in a highly unpredictable and unpredictable process, severely hindering the efficiency and quality of maintenance work.

[0005] Therefore, there is an urgent need for a disassembly system specifically designed for confined spaces that can achieve precise alignment and force control, in order to solve the problems of limited operating space, difficulty in alignment, and easy damage to equipment in existing technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a system and method for disassembling interference fit parts of a ship lift cabin working door in a confined space. This system can disassemble large interference fit parts of the ship lift cabin working door in a confined space, and can easily achieve centering adjustment and force control, effectively preventing the risk of equipment injury caused by off-center loading. At the same time, the disassembly process can be monitored in real time, ensuring full-process detection of the disassembly process. In addition, it can adapt well to interference fit parts of different sizes and different preload forces.

[0007] To achieve the above-mentioned technical features, the present invention aims to provide a disassembly system for the interference fit of the working door of a ship lift in a confined space, comprising: The positioning module is used to dock with the interference fit parts and achieve precise centering and limiting. A frame module, adjustablely connected to the positioning module, is used to provide reaction force support; A hydraulic drive module, fixedly mounted on the frame module, is used to output pulling force to perform demolition operations; The hydraulic measurement and control module, connected to the hydraulic drive module, is used to control its actions and monitor force and displacement parameters in real time to achieve closed-loop control.

[0008] Preferably, the positioning module includes an X-axis positioning plate and a Y-axis positioning plate; the front end of the X-axis positioning plate is used to abut against the interference fit component, and the rear end is slidably connected to the frame module; the Y-axis positioning plate is installed on the X-axis positioning plate by a Y-axis locking screw to realize the adjustment and locking of the X and Y directions.

[0009] Preferably, the X-axis positioning plate has multiple positioning holes evenly distributed on its surface. The Y-axis positioning plate is connected to the positioning holes of the X-axis positioning plate via a vertically arranged Y-axis locking screw. The Y-axis locking screw is adjusted according to the thickness of the interference fit part, and the Y-axis locking screw is moved in the Z-axis direction in conjunction with different positioning holes to adjust the Y-axis positioning plate to the Z-axis centerline of the interference fit part, thereby realizing Z-axis positioning adjustment and locking. By adjusting the Y-axis locking screw, the Y-axis positioning plate is moved in the Y-axis direction, thereby realizing stepless Y-axis adjustment and locking. The front end of the X-axis positioning plate is used to act on the rear end face of the interference fit part, and its rear end engages with the T-slot of the frame module to realize radial X-axis positioning adjustment and locking.

[0010] Preferably, the bottom end of the Y-axis positioning plate is provided with a groove that matches the outer curved surface of the interference fit part; both sides of the Y-axis positioning plate have an X-axis adjustable structure, which is locked by the X-axis locking screw and the first nut after the X-axis adjustment is in place. Four vertical Y-axis locking screws are respectively provided at the four corners of the bottom of the Y-axis positioning plate. The Y-axis locking screws are connected to the holes on the X-axis positioning plate. By adjusting the Y-axis locking screws, the Y-axis positioning plate is moved in the Y direction, realizing stepless precision adjustment of the Y-axis displacement; after the adjustment is in place, the locking screw, the Y-axis locking screw, the first nut, and the second nut, through the coordinated adjustment with the X-axis positioning plate, ensure that the center of force is aligned with the central axis of the interference fit part.

[0011] Preferably, the frame module includes a rigid frame with a T-slot. The rear end of the X-axis positioning plate is provided with a T-slider that slides with the T-slot, so that the positioning module can slide and adjust the X-axis space along the frame module. After adjustment, the T-slider is locked with the T-slot by a set screw.

[0012] Preferably, the frame module is provided with a hydraulic drive base for fixing the hydraulic drive module; the hydraulic drive base has a pre-embedded center hole, which, together with the second locking bolt, firmly fixes the entire hydraulic drive base and the stroke extension pad to the rigid frame; The hydraulic drive module adopts a hollow hydraulic jack, and the hollow hydraulic jack is equipped with a first quick connector for connecting hydraulic pipelines. The frame module also includes at least one stroke extension pad, which can be installed between the hydraulic drive module and the hydraulic drive base to extend the working stroke when the piston rod of the hollow hydraulic jack reaches its maximum stroke.

[0013] Preferably, the hydraulic measurement and control module includes: The control box integrates a touch screen display and control buttons; The hydraulic pump station is used to supply pressurized oil and is equipped with a rod chamber high-pressure oil pipe, a rodless chamber high-pressure oil pipe, a second quick coupling, a lifting ring, and an oil tank level gauge; An ultra-high pressure electromagnetic directional valve is used to receive commands and control the flow and pressure output to the hydraulic drive module; The data acquisition unit is used to collect pressure and displacement parameters in real time during the disassembly process; The control buttons include a hydraulic drive module return button, a hydraulic drive module extension button, a control switch button, an oil pump switch button, and an emergency stop switch.

[0014] Preferably, the data acquisition unit includes a pressure sensor installed at the hydraulic oil inlet for monitoring oil pressure and a flow sensor for monitoring piston rod displacement.

[0015] Preferably, the hydraulic measurement and control module indirectly obtains the piston displacement through the flow integration method; the system is equipped with a high-precision flow sensor on the oil line from the pump station to the hydraulic drive module. The control system obtains the piston movement speed by collecting the flow signal in real time and dividing it by the known effective area of ​​the hydraulic cylinder piston. Then, it performs an integral operation on the time to calculate the absolute displacement of the piston push rod in real time.

[0016] Preferably, another aspect of the present invention provides a method for disassembling the interference fit of the working door of a ship lift in a confined space. The disassembly method is implemented using any of the disassembly systems described above, and includes the following steps: S1: Confirm the specifications of the interference fit parts to be disassembled, the estimated preload force, and the surrounding working space; based on the survey results, select a suitable stroke extension pad from the system accessories; S2: Insert the T-shaped slider at the bottom of the positioning module into the T-shaped groove of the frame module from the end. Then, slide the entire positioning module along the T-shaped groove to a position close to the workpiece for initial positioning. Ensure that the frame module is installed firmly and that the T-shaped groove guide rail on it is parallel to the workpiece axis. S3: X-axis adjustment and locking. Fine-tune the X-axis positioning plate of the positioning module so that its front end face is completely flat and in contact with the rear end face of the workpiece. After the position is determined, use the set screw to fasten the T-shaped slider in the T-shaped groove to complete the X-axis locking. S4: Y and Z direction adjustment and locking. Adjust the Y-direction locking screw according to the thickness of the interference fit part, and use different positioning holes to adjust the Y-direction positioning plate to the Z-direction center line of the interference fit part to ensure uniform force. Then, move the Y-direction locking screws at the four corners of the Y-direction positioning plate in sequence so that the bottom arc surface matches the top outer circular curved surface of the interference fit part to ensure uniform contact. After adjustment, use the first nut to fix the X-direction locking screw, and use the second nut on both sides of the Y-direction locking screw to fix it, thereby completing the positioning in the Y and Z directions. S5: Install the hydraulic drive module onto the hydraulic drive base of the frame module, and ensure that its piston rod is aligned with the positioning module. Connect the first quick connector and the second quick connector at both ends of the rod chamber and rodless chamber high-pressure oil pipes respectively, and connect the hydraulic drive module to the pump station outlet of the hydraulic measurement and control module. S6: Start the hydraulic measurement and control module, operate the control switch button to turn on the power, operate the oil pump switch button to start the oil pump, operate the hydraulic drive module extension button to slowly extend the piston rod, perform a no-load operation test, and check that there are no abnormalities at the system connections; then, set the maximum pressure limit and maximum displacement limit safety parameters for this operation on the touch screen. S7: Perform disassembly operation, operate the hydraulic drive module extension button to slowly extend the piston rod, the hydraulic measurement and control module controls the hydraulic drive module to smoothly apply the pushing force, the operator needs to closely watch the force-displacement curve displayed in real time on the touch screen; S8: Real-time judgment of workpiece status based on changes in the force-displacement curve: If the curve shows that the pressure continues to rise while the displacement remains unchanged, it indicates that static friction is being overcome; if the pressure suddenly drops and the displacement increases sharply, it indicates that the workpiece has started to move; if the pressure reaches the preset upper limit but the displacement does not move, the system should automatically alarm and stop to prevent equipment overload; the operator makes instructions to continue, stop or adjust based on the above information to achieve data-driven precision operation. S9: If the piston rod has reached its maximum stroke but the operation is not completed, perform a stroke extension operation: retract the piston rod, install one or more stroke extension pads between the bottom of the hydraulic drive module and the hydraulic drive base; restart the system and continue the operation; this step can be repeated until the operation is completed. S10: After the workpiece is successfully removed, operate the hydraulic drive module return button to fully retract the piston rod; after the system is depressurized, cut off the power supply to the hydraulic measurement and control module; remove the hydraulic drive module, positioning module and frame module in reverse order S5→S4→S3→S2.

[0017] The present invention has the following beneficial effects: 1. Highly adaptable to space: The modular and compact design adapts to small spaces and solves the problem of traditional tools not being able to fit; it also solves the fundamental space limitation problem of maintaining the ship lift's cabin door.

[0018] 2. Precise alignment, eliminating off-center loading: The three-way alignment adjustment mechanism achieves precise alignment and force control, avoiding off-center loading and damage; it can quickly and accurately adapt to mating parts of different diameters, ensuring that the applied force is completely aligned with the axis, fundamentally avoiding component damage and safety hazards caused by off-center loading, and realizing "non-destructive disassembly".

[0019] 3. Precise and controllable operation: The hydraulic measurement and control module enables precise control of the disassembly force, ensuring smooth operation and greatly reducing impact load. By monitoring the force-displacement curve in real time, the entire operation process is transformed from "experience-driven" to "data-driven," becoming visible, knowable, and controllable, significantly improving the success rate and safety of the operation.

[0020] 4. High versatility and efficiency: The system can quickly adapt to different specifications of interference fit parts by changing a few adaptable tooling, demonstrating good versatility. Mechanized operation replaces high-intensity manual labor, shortens maintenance time windows, and improves work efficiency several times over. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a detailed structural diagram of the positioning module of the present invention.

[0024] Figure 3 This is a detailed structural diagram of the framework module of the present invention.

[0025] Figure 4 This is a schematic diagram showing the connection between the hydraulic drive module and the hydraulic measurement and control module of the present invention.

[0026] Figure 5 This is a flowchart of the disassembly method of the present invention.

[0027] In the diagram: Positioning module 1, Frame module 2, Hydraulic drive module 3, Hydraulic measurement and control module 4; X-axis positioning plate 101, Y-axis positioning plate 102, X-axis locking screw 103, first nut 104, Y-axis locking screw 105, second nut 106, T-shaped slider 107; Rigid frame 201, T-slot 202, hydraulic drive base 203, stroke extension pad 204, second locking bolt 205; Hollow hydraulic jack 301, piston rod 302, first quick connector 303; Control box 401, touch screen display 402, rod chamber high-pressure oil pipe 403, rodless chamber high-pressure oil pipe 404, second quick connector 405, oil tank level gauge 406, lifting ring 407, hydraulic drive module return button 408, hydraulic drive module extension button 409, control switch button 410, oil pump switch button 411, emergency stop switch 412. Detailed Implementation

[0028] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0029] Example 1: like Figure 1As shown, this invention provides a disassembly system for interference-fit components in the working door of a ship lift, mainly comprising: a positioning module 1, a frame module 2, a hydraulic drive module 3, and a hydraulic monitoring and control module 4. The positioning module 1 is used to dock with the interference-fit component and achieve precise centering and limiting; the frame module 2 is adjustablely connected to the positioning module 1 to provide reaction force support; the hydraulic drive module 3 is fixedly installed on the frame module 2 to output pulling force to perform the disassembly operation; the hydraulic monitoring and control module 4 is connected to the hydraulic drive module 3 to control its action and monitor force and displacement parameters in real time, achieving closed-loop control. Through the coordinated operation of these modules, the system safely and accurately disassembles interference-fit components, such as large splined articulated arms, within the confined space of the ship lift's working door. Furthermore, it facilitates centering adjustment and force control, effectively preventing equipment injury risks caused by off-center loading. Simultaneously, it allows for real-time monitoring of the disassembly process, ensuring full-process detection. In addition, it can adapt well to interference-fit components of different sizes and with different preloads.

[0030] like Figure 2As shown, the positioning module 1 is the core component for achieving precise centering in this embodiment. It consists of an X-axis positioning plate 101, a Y-axis positioning plate 102, an X-axis locking screw 103, a first nut 104, a Y-axis locking screw 105, a second nut 106, and a T-shaped slider 107. The X-axis positioning plate 101 is a rectangular thick steel plate with seven evenly distributed positioning holes on its surface. The Y-axis locking screw 105 can be adjusted according to the thickness of the interference fit part by engaging different positioning holes to adjust the Y-axis positioning plate 102 to the Z-axis centerline of the interference fit part, ensuring uniform force distribution. Its front end is precision machined to flatly abut against the rear end of the interference fit part (hereinafter referred to as the "workpiece"). Its rear end is equipped with a T-shaped slider 107, which, by engaging with the T-slot 202 on the frame module 2, allows the entire positioning module 1 to slide and adjust within a wide range along the X-axis direction of the workpiece axis. After the position is determined, locking is achieved by tightening the locking bolt of the T-slot 202. The Y-axis positioning plate 102 is fixed in the positioning hole of the X-axis positioning plate 101 by a Y-axis locking screw 105 and a second nut 106. Its bottom end is machined with a V-shaped or arc-shaped groove that matches the outer curved surface of the workpiece top, increasing the contact area and improving stability. The Y-axis positioning plate 102 has X-axis adjustable structures on both sides. After X-axis adjustment, it is locked by an X-axis locking screw 103 and a first nut 104. The bottom ends of the adjustable structures on both sides of the Y-axis positioning plate 102 are mounted above the X-axis positioning plate 101 by four vertically arranged Y-axis locking screws 105, with the lower ends of the Y-axis locking screws 105 connected to the X-axis positioning plate 101. By adjusting the depth of the Y-axis locking screws 105 entering the positioning hole, the Y-axis positioning plate 102 can be moved up and down, achieving stepless precision adjustment of the Y-axis displacement. After adjustment, several X-direction locking screws 103, Y-direction locking screws 105, first nuts 104, and second nuts 106 are used to adjust and lock the displacement of the Y-direction positioning plate 102 in the radial Y direction. Through coordinated adjustment with the X-direction positioning plate 101, the center of force is ensured to be aligned with the axis of the interference fit part.

[0031] like Figure 3As shown, the frame module 2 is the load-bearing foundation of the entire system, and its main body is a rigid frame 201 welded from high-strength alloy steel. This frame undergoes annealing treatment to eliminate internal stress, ensuring structural stability and minimal deformation under enormous reaction forces. The frame module includes the rigid frame 201, T-slots 202, a hydraulic drive base 203, stroke extension pads 204, and a second locking bolt 205. The rigid frame 201 has a threaded hole at its center on the crossbeam, and the hydraulic drive base 203 has a pre-embedded center hole. Together with the second locking bolt 205, the entire hydraulic drive base 203 and the stroke extension pads 204 can be firmly fixed to the rigid frame 201. The frame module 2 can also be equipped with a set of stroke extension pads 204. The stroke extension pads 204 are standard blocks made of high-strength steel, used to extend the effective working stroke of the system when the piston rod of the hydraulic drive module 3 reaches its maximum stroke but the operation is not yet complete, by being installed between the hydraulic drive module 3 and the hydraulic drive base 203. The travel extension pad 204 has a standardized bolt positioning hole at its center, enabling quick and reliable connection with the hydraulic drive base 203 and other pads, ensuring precise transmission of thrust along the axis. A T-slot guide rail is machined along the X-direction on the main body of the frame module. The cross-section of the T-slot 202 is inverted T-shaped, with threaded holes distributed along its center line. The positioning module 1 is mounted on the frame module via a T-slider 107 at the tail end of the X-direction positioning plate 101 that matches the T-slot 202. During assembly, the T-slider is embedded in the T-slot 202, allowing the positioning module to be adjusted over a wide range of radial X-direction along the workpiece for X-direction positioning. After the position is determined, a radial threaded hole is provided on the side of the T-slider 107, and a set screw is fitted thereon. Tightening the set screw causes its end to press against the side wall of the T-slider 107 and the T-slot 202, achieving rapid locking through friction.

[0032] like Figure 4 As shown, the hydraulic drive module 3 is the power output unit of the system. In this embodiment, it uses a double-acting hollow hydraulic jack 301. This jack is fixed to the hydraulic drive base 203 of the frame module 2 via its tail. The central axis of the piston rod 302 of the hollow hydraulic jack 301 is aligned with the geometric center of the positioning module 1 and the geometric center of the workpiece shaft. When the piston rod 302 extends forward, i.e., in the Z direction, its front end pushes against the end face of the workpiece shaft, thereby transmitting the pulling force to the workpiece to achieve the disassembly operation. The hollow hydraulic jack 301 is connected to the hydraulic measurement and control module 4 through a rod-cavity high-pressure oil pipe 403 and a rodless-cavity high-pressure oil pipe 404.

[0033] like Figure 4As shown, the hydraulic control module 4 is the control unit of the entire system. It is integrated into a portable control box 401. The control box 401 panel is equipped with a touch screen display 402, control switch buttons 410, oil pump switch buttons 411, emergency stop switch 412, hydraulic drive module extension button 409, hydraulic drive module return button 408, lifting ring 407, oil tank level gauge 406, and quick connector 405. The core of the system includes: an electric hydraulic pump station with an oil tank, which provides the power source for the system; a set of ultra-high pressure electromagnetic directional valves, which receive electrical signal commands and steplessly adjust the flow and pressure output to the hydraulic drive module 3, thereby achieving precise control of the pushing speed and output force; the hydraulic pump station system adopts a PLC system in conjunction with the electromagnetic directional valves for control.

[0034] The system also includes a data acquisition unit, which uses pressure and flow sensors installed on the oil line. The hydraulic control module 4 indirectly obtains the piston displacement through the flow integration method. A high-precision flow sensor is installed on the oil line from the pump station to the hydraulic drive module. The control system collects the flow signal in real time, divides it by the known effective area of ​​the hydraulic cylinder piston to obtain the piston speed, and then integrates it over time to calculate the absolute displacement of the piston rod in real time. This design integrates all sensitive sensing elements within the pump station, greatly improving the system's reliability under harsh working conditions. The system monitors and collects the hydraulic drive output force and the displacement of the piston rod 302 in the hydraulic drive module 3 in real time. All this collected data is displayed on the touch screen 402 in the form of numbers and real-time curves, such as force-displacement curves, allowing operators to accurately determine the workpiece status: whether it has started to bear force, whether it is jammed, or whether it has completely disengaged. The hydraulic control module 4 is operated by a combination of buttons and the touch screen, controlling the rise, fall, and force distribution of the hydraulic drive module 3. The hydraulic system adopts a mature ultra-high pressure system, meeting the technical requirements of high efficiency, low energy consumption, and small size, making it suitable for long-term online operation in outdoor environments. The ultra-high pressure system can proportionally control the lifting and lowering of the cylinders, achieving closed-loop position control in conjunction with sensors, and also has pressure control functionality. This system achieves closed-loop control, allowing operators to preset maximum pressure or displacement limits. Once the system reaches the set value, it automatically maintains pressure or stops, effectively avoiding the risk of equipment damage caused by overpressure and overload.

[0035] Example 2: A method for disassembling an application of the system described herein includes the following steps: By adjusting the positioning module 1, precise alignment and locking with the interference fit part in the X, Y, and Z directions can be achieved. The hydraulic drive module 3 is controlled to apply a pushing or pulling force, while the hydraulic measurement and control module 4 monitors the mechanical parameters in real time. When the piston rod 302 of the hydraulic drive module 3 reaches its maximum stroke but the operation is not completed, the operation can continue after the stroke extension pad 204 is added to extend the working stroke.

[0036] Preferably, if the piston rod 302 reaches its maximum stroke but the operation is not completed, the following steps are performed: This causes the piston rod 302 to retract. At least one stroke extension pad 204 is installed between the hydraulic drive module 3 and the frame module 2; Restart the system and continue the job. This process can be repeated until the job is completed.

[0037] Preferably, the step of achieving precise centering by adjusting the positioning module 1 includes: first adjusting and locking along the X direction, and then adjusting and locking the Y direction steplessly in a precise manner by adjusting the Y direction locking screw 105.

[0038] Example 2: The method of using the disassembly system specifically includes the following steps: S1: Confirm the specifications of the interference fit parts to be disassembled, the estimated preload force, and the surrounding working space; based on the survey results, select a suitable stroke extension pad from the system accessories; S2: Insert the T-shaped slider 107 at the bottom of the positioning module 1 into the T-shaped groove 202 of the frame module 2 from the end. Then, slide the entire positioning module 1 along the T-shaped groove 202 to a position close to the workpiece for preliminary positioning. Ensure that the frame module 2 is installed firmly and that the T-shaped groove guide rail on it is parallel to the workpiece axis. S3: X-axis adjustment and locking. Fine-tune the X-axis positioning plate 101 of the positioning module 1 so that its front end face is completely flat and in contact with the rear end face of the workpiece. After the position is determined, use set screws to fasten the T-shaped slider 107 in the T-shaped groove 202 to complete the X-axis locking. S4: Y and Z direction adjustment and locking. Adjust the Y-direction locking screw 105 according to the thickness of the interference fit part, and use different positioning holes to adjust the Y-direction positioning plate 102 to the Z-direction center line of the interference fit part to ensure uniform force. Then, move the Y-direction locking screws 105 at the four corners of the Y-direction positioning plate 102 in sequence so that the bottom arc surface matches the top outer circular curved surface of the interference fit part to ensure uniform contact. After adjustment, use the first nut 104 to fix the X-direction locking screw 103, and use the second nut 106 to fix the Y-direction locking screw 105 on both sides, thereby completing the Y-direction and Z-direction positioning. S5: Install the hydraulic drive module 3 onto the hydraulic drive base 203 of the frame module 2, and ensure that its piston rod is aligned with the positioning module 1. Connect the first quick connector 303 and the second quick connector 405 to the two ends of the rod chamber and rodless chamber high-pressure oil pipe respectively, and connect the hydraulic drive module 3 to the pump station outlet of the hydraulic measurement and control module 4. S6: Start the hydraulic measurement and control module 4, operate the control switch button 410 to turn on the power, operate the oil pump switch button 411 to start the oil pump, operate the hydraulic drive module extension button 409 to slowly extend the piston rod 302, perform a no-load operation test, and check that there are no abnormalities at the system connections; then, set the maximum pressure limit and maximum displacement limit safety parameters for this operation on the touch screen 402. S7: Perform disassembly operation, operate the hydraulic drive module extension button 409 to slowly extend the piston rod 302. The hydraulic measurement and control module 4 controls the hydraulic drive module 3 to smoothly apply the pushing force. The operator needs to closely observe the force-displacement curve displayed in real time on the touch screen 402. S8: Real-time judgment of workpiece status based on changes in the force-displacement curve: If the curve shows that the pressure continues to rise while the displacement remains unchanged, it indicates that static friction is being overcome; if the pressure suddenly drops and the displacement increases sharply, it indicates that the workpiece has started to move; if the pressure reaches the preset upper limit but the displacement does not move, the system should automatically alarm and stop to prevent equipment overload; the operator makes instructions to continue, stop or adjust based on the above information to achieve data-driven precision operation. S9: If the piston rod has reached its maximum stroke but the operation is not completed, perform a stroke extension operation: retract the piston rod, install one or a set of stroke extension pads between the bottom of the hydraulic drive module 3 and the hydraulic drive base 203; restart the system and continue the operation; this step can be repeated until the operation is completed. S10: After the workpiece is successfully removed, operate the hydraulic drive module return button 408 to fully retract the piston rod; after the system is depressurized, cut off the power supply to the hydraulic control module 4; remove the hydraulic drive module 3, positioning module 1 and frame module 2 in reverse order S5→S4→S3→S2.

Claims

1. A disassembly system for the interference fit components of the working door of a ship lift in a confined space, characterized in that, include: Positioning module (1) is used to dock with interference fit parts and achieve precise centering and limiting; The frame module (2) is adjustablely connected to the positioning module (1) to provide reaction force support; The hydraulic drive module (3) is fixedly installed on the frame module (2) and is used to output pulling force to perform demolition operations; The hydraulic measurement and control module (4) is connected to the hydraulic drive module (3) to control its action and monitor force and displacement parameters in real time to achieve closed-loop control.

2. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space as described in claim 1, characterized in that: The positioning module (1) includes an X-axis positioning plate (101) and a Y-axis positioning plate (102); the front end of the X-axis positioning plate (101) is used to abut against the interference fit part, and the rear end is slidably connected to the frame module (2); the Y-axis positioning plate (102) is installed on the X-axis positioning plate (101) through a Y-axis locking screw (105) to realize the adjustment and locking of the X and Y directions.

3. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 2, characterized in that: The X-axis positioning plate (101) has multiple positioning holes evenly distributed on its surface. The Y-axis positioning plate (102) is connected to the positioning holes of the X-axis positioning plate (101) by a vertically set Y-axis locking screw (105). The Y-axis locking screw (105) is adjusted according to the thickness of the interference fit part. It moves in the Z-axis direction with different positioning holes to adjust the Y-axis positioning plate (102) to the Z-axis center line of the interference fit part, thereby realizing Z-axis positioning adjustment and locking. By adjusting the Y-axis locking screw (105), the Y-axis positioning plate (102) is moved in the Y-axis direction, thereby realizing stepless adjustment and locking in the Y-axis direction. The front end of the X-axis positioning plate (101) is used to act on the rear end face of the interference fit part. Its rear end cooperates with the T-slot (202) of the frame module (2) to realize positioning adjustment and locking in the radial X-axis direction.

4. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 2, characterized in that: The bottom end of the Y-direction positioning plate (102) is provided with a slot that matches the outer curved surface of the interference fit part; the two sides of the Y-direction positioning plate (102) are X-direction adjustable structures. After the X-direction adjustment is in place, it is locked by the X-direction locking screw (103) and the first nut (104). The bottom four corners of the Y-direction positioning plate (102) are respectively provided with four vertical Y-direction locking screws (105). The Y-direction locking screws (105) are connected to the holes on the X-direction positioning plate (101). By adjusting the Y-direction locking screws (105), the Y-direction positioning plate (102) is driven to move in the Y direction, so as to realize stepless precision adjustment of the Y-direction displacement. After the adjustment is in place, by the locking screws (103), the Y-direction locking screws (105), the first nut (104) and the second nut (106), through the coordinated adjustment with the X-direction positioning plate (101), it is ensured that the center of force is aligned with the central axis of the interference fit part.

5. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 2, characterized in that: The frame module (2) includes a rigid frame (201), on which a T-slot (202) is provided. The rear end of the X-direction positioning plate (101) is provided with a T-slot slider (107) that slides with the T-slot (202), so that the positioning module (1) can slide along the frame module (2) to adjust the X-direction space. After adjustment, the T-slot slider (107) is locked with the T-slot (202) by a set screw.

6. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 2, characterized in that: The frame module (2) is provided with a hydraulic drive base (203) for fixing the hydraulic drive module (3); the hydraulic drive base (203) has a pre-embedded center hole, which, together with the second locking bolt (205), firmly fixes the entire hydraulic drive base (203) and the stroke extension pad (204) onto the rigid frame (201); The hydraulic drive module (3) adopts a hollow hydraulic jack (301), and the hollow hydraulic jack (301) is provided with a first quick connector (303) for connecting hydraulic pipelines. The frame module (2) also includes at least one stroke extension pad (204), which can be installed between the hydraulic drive module (3) and the hydraulic drive base (203) to extend the working stroke when the piston rod (302) of the hollow hydraulic jack (301) reaches its maximum stroke.

7. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 1, characterized in that: The hydraulic measurement and control module (4) includes: The control box (401) integrates a touch screen display (402) and control buttons; A hydraulic pump station is used to supply pressurized oil and is equipped with a rod chamber high-pressure oil pipe (403), a rodless chamber high-pressure oil pipe (404), a second quick coupling (405), a lifting ring (407), and an oil tank level gauge (406). An ultra-high pressure electromagnetic directional valve is used to receive commands and control the flow and pressure output to the hydraulic drive module (3); The data acquisition unit is used to collect pressure and displacement parameters in real time during the disassembly process; The control buttons include a hydraulic drive module return button (408), a hydraulic drive module extension button (409), a control switch button (410), an oil pump switch button (411), and an emergency stop switch (412).

8. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 1, characterized in that: The data acquisition unit includes a pressure sensor installed at the hydraulic oil circuit inlet for monitoring the oil circuit pressure and a flow sensor for monitoring the displacement of the piston rod (302).

9. The system for disassembling interference-fit components of a ship lift cabin working door in a confined space according to claim 1, characterized in that: The hydraulic measurement and control module (4) indirectly obtains the piston displacement through the flow integration method. The system is equipped with a high-precision flow sensor on the oil line from the pump station to the hydraulic drive module. The control system collects the flow signal in real time, divides it by the known effective area of ​​the hydraulic cylinder piston to obtain the piston movement speed, and then performs an integral operation on the time to calculate the absolute displacement of the piston push rod in real time.

10. A method for disassembling the interference fit of the working door of a ship lift in a confined space, characterized in that, The disassembly method is implemented using the disassembly system described in any one of claims 1-9. Includes the following steps: S1: Confirm the specifications of the interference fit parts to be disassembled, the estimated preload force, and the surrounding working space environment; based on the survey results, select a suitable stroke extension pad from the system accessories; S2: Insert the T-shaped slider (107) at the bottom of the positioning module (1) into the T-shaped groove (202) of the frame module (2) from the end. Then, slide the entire positioning module (1) along the T-shaped groove (202) to a position close to the workpiece for preliminary positioning. Ensure that the frame module (2) is installed firmly and that the direction of the T-shaped groove guide rail on it is parallel to the axis of the workpiece. S3: X-axis adjustment and locking. Fine-tune the X-axis positioning plate (101) of the positioning module (1) so that its front end face is completely flat and in contact with the rear end face of the workpiece. After the position is determined, use the set screw to fasten the T-shaped slider (107) in the T-shaped groove (202) to complete the X-axis locking. S4: Y and Z direction adjustment and locking. Adjust the Y direction locking screw (105) according to the thickness of the interference fit part and use different positioning holes to adjust the Y direction positioning plate (102) to the Z direction center line of the interference fit part to ensure that the force is uniform. Then move the Y direction locking screws (105) at the four corners of the Y direction positioning plate (102) in sequence so that the bottom arc surface matches the top outer circle curved surface of the interference fit part to ensure uniform contact. After the adjustment is completed, use the first nut (104) to fix the X direction locking screw (103) and use the second nut (106) on both sides of the Y direction locking screw (105) to fix it, thereby completing the positioning of the Y and Z directions. S5: Install the hydraulic drive module (3) onto the hydraulic drive base (203) of the frame module (2), and ensure that its piston rod is aligned with the positioning module (1). Use the rod chamber and rodless chamber high-pressure oil pipes to connect the first quick connector (303) and the second quick connector (405) at both ends respectively, and connect the hydraulic drive module (3) to the pump station outlet of the hydraulic measurement and control module (4). S6: Start the hydraulic measurement and control module (4), operate the control switch button (410) to turn on the power, operate the oil pump switch button (411) to start the oil pump, operate the hydraulic drive module extension button (409) to make the piston rod (302) slowly extend, perform no-load operation test, and check that there are no abnormalities at each connection of the system. Subsequently, the maximum pressure limit and maximum displacement limit safety parameters for this operation are set on the touch display screen (402); S7: Perform disassembly operation, operate the hydraulic drive module extension button (409) to slowly extend the piston rod (302), the hydraulic measurement and control module (4) controls the hydraulic drive module (3) to smoothly apply the top thrust, the operator needs to closely watch the force-displacement curve displayed in real time on the touch screen (402); S8: Real-time judgment of workpiece status based on changes in the force-displacement curve: If the curve shows that the pressure continues to rise while the displacement remains unchanged, it indicates that static friction is being overcome; if the pressure suddenly drops and the displacement increases sharply, it indicates that the workpiece has started to move; if the pressure reaches the preset upper limit but the displacement does not move, the system should automatically alarm and stop to prevent equipment overload; the operator makes instructions to continue, stop or adjust based on the above information to achieve data-driven precision operation. S9: If the piston rod has reached its maximum stroke but the operation is not completed, perform the stroke extension operation: retract the piston rod and install one or a set of stroke extension pads between the bottom of the hydraulic drive module (3) and the hydraulic drive base (203); restart the system and continue the operation; this step can be repeated until the operation is completed. S10: After the workpiece is successfully removed, operate the hydraulic drive module return button (408) to make the piston rod fully retract; after the system is depressurized, cut off the power supply of the hydraulic measurement and control module (4); remove the hydraulic drive module (3), positioning module (1) and frame module (2) in reverse order S5→S4→S3→S2.

Images