Hydraulic system for wheel clamp of ship unloader

Abstract

The invention discloses a hydraulic system for a wheel clamp of a ship unloader, which belongs to the technical field of hydraulic systems and comprises an oil tank and an oil pumping component assembled in the oil tank, a valve group is assembled on the oil tank, an energy accumulator is assembled on the outer wall of the oil tank and connected with the valve group through a connecting pipe, and the oil pumping component comprises a motor mounted on the oil tank. An oil pump connected with the output end of the motor is assembled in the oil tank; the input end of the oil pump is connected with an oil suction filtering unit through an oil suction pipe; by arranging the oil suction filtering unit and the replacing unit, efficient replacement of a filter is achieved, an electric push rod drives a guide rod to move, so that a mounting frame is automatically transferred between an oil tank and an operation box, a first motor drives a shaft rod to rotate a rotating seat, and rapid switching of a short transverse rod from a vertical state to a horizontal state is achieved; meanwhile, the oil tank does not need to be opened in the replacement process, and external dust and impurities can be effectively prevented from entering the oil tank.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system technology, and in particular to a hydraulic system for a wheel clamp of a ship unloader. Background Technology

[0002] In the field of port machinery, the hydraulic system of the wheel clamp of the ship unloader is a key actuator, and its reliability directly affects the equipment's operating efficiency and safety.

[0003] In the hydraulic system of the wheel clamp of a ship unloader, the maintenance and replacement of the suction filter is a key link to ensure the stable operation of the system. The traditional design adopts a fixed filter structure, which requires a complete shutdown of the machine and manual removal of the oil tank cover or inspection port during replacement. The replacement requires the removal of a large number of structural parts and bolts, which is time-consuming and seriously affects the equipment maintenance efficiency. At the same time, the oil tank needs to be opened and closed frequently during the replacement process, which can easily lead to the intrusion of external dust and impurities into the oil, causing oil contamination, which in turn leads to wear, performance degradation and even failure of hydraulic system components. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the oil tank needs to be opened and closed frequently during the replacement process, which easily leads to the intrusion of external dust and impurities into the oil and causes oil contamination. Therefore, this invention proposes a hydraulic system for the wheel clamp of a ship unloader.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A hydraulic system for a ship unloader wheel clamp includes an oil tank and a pump assembly installed inside the oil tank. A valve group is installed on the oil tank, and an accumulator is installed on the outer wall of the oil tank. The accumulator is connected to the valve group through a connecting pipe. The pump assembly includes an electric motor installed on the oil tank, and an oil pump connected to the output end of the electric motor is installed inside the oil tank. The input end of the oil pump is connected to an oil suction filter unit through an oil suction pipe. The oil suction and filtration unit includes a guide frame fixed inside the oil tank, a mounting frame inserted into the guide frame, and an oil suction filter assembled inside the mounting frame; A replacement unit is installed on the outer wall of the oil tank. The replacement unit includes an operating box. The mounting bracket enters the operating box via a guide rod inserted into the operating box. The oil suction filter, which follows the mounting bracket into the operating box, is installed and removed via a pushing component that is slidably mounted on the bottom wall of the operating box.

[0006] As a further description of the above technical solution: The oil suction filter unit also includes a rotating seat rotatably connected to the two inner side walls of the mounting bracket. A short crossbar is fixed on the rotating seat. Both ends of the oil suction filter are provided with cross grooves that are adapted to the short crossbars, so that the oil suction filter can be inserted between the two rotating seats.

[0007] As a further description of the above technical solution: The mounting bracket has arc-shaped grooves on both sides of its inner top and bottom walls for short crossbars to pass through. One side wall of the arc-shaped groove has a mounting hole, and a spherical limiting post is connected to the mounting hole by a spring. Both ends of the short crossbar have limiting grooves that match the spherical limiting post, so that the rotating seat can be restricted within the mounting bracket after rotating 90°.

[0008] As a further description of the above technical solution: One end of the guide rod is fixed to the mounting bracket inside the control box. A shaft is inserted into the guide rod through a through hole. One end of the shaft passes through the guide rod and the mounting bracket and is fixed to one of the rotating seats.

[0009] As a further description of the above technical solution: The replacement unit also includes an electric push rod mounted on the replacement unit. One end of the electric push rod is bolted to the end of the guide rod located outside the operation box. The end of the guide rod located outside the operation box is equipped with a first motor, and the output end of the first motor is connected to one end of the shaft.

[0010] As a further description of the above technical solution: The pushing assembly includes a sliding frame slidably connected to the bottom wall of the operating box. A pusher is rotatably connected to the sliding frame via a mounting base. Positioning seats are fixed on both sides of the mounting base. A blocking plate is rotatably connected to the positioning seat. A torsion spring is sleeved on both ends of the blocking plate that pass through the positioning seat. Sealing doors are rotatably connected to both ends of the operating box via hinges. The upper surface of the control box is equipped with a second motor and a third motor on both sides. The output ends of the second motor and the third motor are equipped with rollers, and pull ropes are wound on the rollers. One end of each pull rope is inserted into the control box and fixed to the two ends of the slide frame.

[0011] As a further description of the above technical solution: Both sides of the bottom wall of the control box are equipped with long horizontal bars that are adapted to the transverse groove via support rods, and the replacement oil suction filter is slidably installed on the long horizontal bars.

[0012] As a further description of the above technical solution: One side of the mounting bracket is fixedly connected to a front end seat through a suction hole, and one end of the oil suction pipe is fixedly connected to the front end seat.

[0013] As a further description of the above technical solution: The outer walls of the oil tank and the control box are provided with inlet and outlet slots that are compatible with the front end seat and the mounting bracket. The outer walls of the front end seat and both ends of the mounting bracket are fitted with sealing rings so that the front end seat and the mounting bracket can block the inlet and outlet.

[0014] As a further description of the above technical solution: The output end of the oil pump is connected to the valve group through the oil delivery pipe. The oil tank is equipped with a return oil filter. One end of the valve group is connected to the return oil filter through the return oil pipe. An oil filling port is provided on the upper surface of the oil tank near the return oil filter.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The oil suction filter unit and replacement unit are designed to achieve efficient filter replacement. The guide rod is driven by an electric push rod to move, so that the mounting bracket can be automatically transferred between the oil tank and the control box. In conjunction with the first motor driving the shaft to rotate the rotating seat, the short horizontal bar can be quickly switched from a vertical state to a horizontal state. The oil suction filter can be disassembled and installed with only external force. At the same time, the oil tank does not need to be opened during the replacement process, which can effectively prevent external dust and impurities from entering the oil tank. The second and third motors drive the sliding frame to reciprocate along the limiting slide groove by winding and unwinding the rope via the reel. In conjunction with the arc-shaped cylindrical contact surface of the push frame and the torsion spring reset structure of the blocking plate, the oil suction filter is accurately pushed and installed on the long crossbar. In a single operation, the old filter element can be removed and the new filter element can be placed simultaneously. Attached Figure Description

[0016] Figure 1 A first-view structural schematic diagram of the interior of a fuel tank provided according to an embodiment of the present invention is shown; Figure 2 The present invention provides an embodiment of the invention. Figure 1 Enlarged view of point A in the middle; Figure 3 A cross-sectional view of the mounting bracket provided according to an embodiment of the present invention is shown; Figure 4 The present invention provides an embodiment of the invention. Figure 3 Enlarged view of point B in the middle; Figure 5 This diagram shows the internal structure of the operating box after it has been cut open, according to an embodiment of the present invention. Figure 6 A schematic diagram of the structure of the pushing component provided according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the interior of a fuel tank from a second perspective, provided according to an embodiment of the present invention, is shown. Figure 8 The present invention provides an embodiment of the invention. Figure 7 Enlarged view of point C in the middle; Figure 9 A schematic diagram of the overall structure in use according to an embodiment of the present invention is shown; Figure 10 This diagram illustrates the overall structure of the oil suction filter in its replacement state according to an embodiment of the present invention. Figure 11 A schematic diagram of the pusher frame provided according to an embodiment of the present invention is shown; Figure 12 The present invention provides an embodiment of the invention. Figure 11 Enlarged view at point D; Figure 13 A schematic diagram of the structure of the shaft provided according to an embodiment of the present invention is shown; Figure 14 The present invention provides an embodiment of the invention. Figure 13 Enlarged view at point E in the middle; Figure 15 A schematic diagram of the structure of an oil pump provided according to an embodiment of the present invention is shown.

[0017] Legend: 10. Fuel tank; 11. Valve assembly; 12. Accumulator; 20. Oil pump assembly; 21. Electric motor; 22. Oil pump; 23. Oil suction pipe; 30. Oil suction filter unit; 31. Guide frame; 32. Mounting frame; 33. Rotating seat; 34. Short crossbar; 35. Oil suction filter; 36. Front end seat; 37. Sealing ring; 38. Spherical limiting post; 40. Replacement unit; 41. Control box; 42. Guide rod; 43. Push assembly; 431. Sliding frame; 432. Push frame; 433. Blocking plate; 434. Torsion spring; 435. Second motor; 436. Third motor; 437. Pull rope; 438. Long crossbar; 44. Shaft; 45. Electric push rod; 46. First motor. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 - Figure 15 As shown, the present invention provides: A hydraulic system for a ship unloader wheel clamp includes an oil tank 10 and a pump assembly 20 assembled inside the oil tank 10. A valve group 11 is mounted on the oil tank 10, and an accumulator 12 is mounted on the outer wall of the oil tank 10. The accumulator 12 is connected to the valve group 11 through a connecting pipe. The pump assembly 20 includes an electric motor 21 mounted on the oil tank 10, and an oil pump 22 connected to the output end of the electric motor 21 is assembled inside the oil tank 10. The output end of the oil pump 22 is connected to the valve group 11 through the oil delivery pipe. The oil tank 10 is equipped with a return oil filter. One end of the valve group 11 is connected to the return oil filter through the return oil pipe. An oil filling port is provided on the upper surface of the oil tank 10 near the return oil filter. In particular, a sealing cap is installed in the oil filling port. At the same time, a level gauge is installed on one side of the oil tank 10 to observe the oil level in the oil tank 10.

[0020] like Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, the input end of the oil pump 22 is connected to the oil suction filter unit 30 through the oil suction pipe 23; The oil suction filter unit 30 includes a guide frame 31 fixed inside the oil tank 10. A mounting frame 32 is inserted into the guide frame 31. An oil suction filter 35 is assembled inside the mounting frame 32. In particular, the two ends of the mounting frame 32 are round, but the inner top wall and inner top wall of the mounting frame 32 are flat and not arc-shaped. The flat inner wall can ensure that the movement of the oil suction filter 35 is not restricted when it is under the action of external force, and can support the oil suction filter 35.

[0021] The oil suction filter unit 30 also includes a rotating seat 33 rotatably connected to the two inner side walls of the mounting bracket 32. A short crossbar 34 is fixed on the rotating seat 33. Both ends of the oil suction filter 35 are provided with cross grooves that are adapted to the short crossbar 34, so that the oil suction filter 35 can be inserted between the two rotating seats 33. It is worth noting that the oil suction filter 35 can only move along the short crossbar 34 under the action of external force.

[0022] Both sides of the inner top and bottom walls of the mounting bracket 32 ​​are provided with arc-shaped grooves for the short crossbar 34 to pass through. One side wall of the arc-shaped groove is provided with a mounting hole. A spherical limiting post 38 is connected to the mounting hole by a spring. Both ends of the short crossbar 34 are provided with limiting grooves that match the spherical limiting post 38, so that the rotating seat 33 can be restricted within the mounting bracket 32 ​​after rotating 90°.

[0023] It is worth noting that after the rotating seat 33 rotates 90°, the short horizontal bar 34 changes from a horizontal state to a vertical state. The spring, in conjunction with the spherical limiting post 38, can help fix the position of the short horizontal bar 34. At the same time, in this state, the oil suction filter 35 in the mounting bracket 32 ​​cannot move. When it rotates 90° again, the short horizontal bar 34 rotates back to a horizontal state. At this time, the oil suction filter 35 can move left and right under the action of external force.

[0024] One side of the mounting bracket 32 ​​is fixedly connected to the front end seat 36 through a suction hole. One end of the oil suction pipe 23 is fixedly connected to the front end seat 36. In particular, the oil suction pipe 23 is a flexible hose, and its length is set to be relatively long so as not to restrict the front end seat 36 from moving back and forth.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a replacement unit 40 is installed on the outer wall of the oil tank 10. The replacement unit 40 includes an operating box 41. The mounting bracket 32 ​​enters the operating box 41 via a guide rod 42 inserted into the operating box 41. The oil suction filter 35, which follows the mounting bracket 32 ​​into the operating box 41, is disassembled and installed via a pushing component 43 that is slidably installed on the bottom wall of the operating box 41. One end of the guide rod 42, which enters the operating box 41, is fixed to the mounting bracket 32. A shaft 44 is inserted into the guide rod 42 through a through hole. One end of the shaft 44 passes through the guide rod 42 and the mounting bracket 32 ​​and is fixed to one of the rotating seats 33. The shaft 44 can control the rotation of the rotating seat 33. At the same time, in order to ensure the stability of the guide rod 42 during movement, a retaining sleeve is fitted on the outer surface of the guide rod 42. The retaining sleeve is inside the operating box 41 and fixed to the inner wall of the operating box 41. It is used to stably support the guide rod 42 and has a guiding function.

[0026] The replacement unit 40 also includes an electric push rod 45 mounted on the replacement unit 40. One end of the electric push rod 45 is bolted to the end of the guide rod 42 located outside the operation box 41. The end of the guide rod 42 located outside the operation box 41 is equipped with a first motor 46. The output end of the first motor 46 is connected to one end of the shaft 44.

[0027] Specifically, the electric push rod 45 can control the guide rod 42 to move back and forth, so that the mounting bracket 32 ​​can enter the operating box 41 from the oil tank 10 to perform filter replacement. After the mounting bracket 32 ​​enters the operating box 41, the first motor 46 drives the shaft 44 to rotate 90°, so that the rotating seat 33 drives the suction filter 35 to rotate 90°, so that the short crossbar 34 rotates from a vertical state to a horizontal state. At this time, the suction filter 35 can be disassembled and installed.

[0028] After disassembly and assembly, the first motor 46 drives the shaft 44 to rotate the rotating seat 33 and the oil suction filter 35 on it by 90°, so that the short horizontal bar 34 rotates from the horizontal state to the vertical state. At this time, the restriction after the new oil suction filter 35 is installed is completed. Then, the electric push rod 45 can drive the mounting bracket 32 ​​to move back from the operation box 41 into the oil tank 10.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 11 and Figure 12 As shown, the pushing component 43 includes a sliding frame 431 slidably connected to the bottom wall of the operating box 41. Preferably, a limiting groove is provided on the bottom wall of the operating box 41. In particular, the limiting groove is inverted T-shaped. A limiting strip that matches the limiting groove is fixed on the lower surface of the sliding frame 431. The sliding frame 431 is slidably installed in the operating box 41 through the limiting strip. A pusher 432 is rotatably connected to the sliding frame 431 through a mounting seat. Preferably, the part of the pusher 432 that contacts the oil suction filter 35 is arc-shaped. In particular, the bottom of the mounting frame 32 is open to allow the pusher 432 to pass through. Both sides of the mounting base are fixed with positioning seats, and blocking plates 433 are rotatably connected to the positioning seats. The two ends of the blocking plates 433, which pass through the positioning seats, are fitted with torsion springs 434. The torsion springs 434 provide a force to the blocking plates 433 to keep them vertical. This allows the blocking plates 433 on both sides to work together to drive the push frame 432 to remain vertical. In this state, regardless of whether the push frame 432 rotates backward or forward under external force (the push frame 432 can only move forward and backward, not left or right, and the definitions of forward, backward, left, and right directions are as follows...), Figure 5 (Based on the standard), when the external force is released, the torsion spring 434 will drive the blocking plate 433 to drive the pusher 432 to return to the vertical state. Both ends of the control box 41 are connected to the sealing door by hinges.

[0030] The upper surface of the control box 41 is equipped with a second motor 435 and a third motor 436 on both sides. The output ends of the second motor 435 and the third motor 436 are equipped with reels, and pull ropes 437 are wound on the reels. One end of each pull rope 437 is inserted into the control box 41 and fixed to both ends of the slide frame 431. In particular, both ends of the slide frame 431 are fixed with connecting seats, and studs are threaded onto the connecting seats. One end of the pull rope 437 is fixed to the stud, so that the pull rope 437 can be disassembled. At the same time, in order to ensure the direction of the pull rope 437, guide tubes are fixed to the bottom of the inner side of the sealing door and the upper surface of the control box 41. After passing through the two guide tubes, the two pull ropes 437 are fixed to the connecting seats by studs.

[0031] Meanwhile, it is worth noting that when the second motor 435 controls the winding wheel connected to it to rotate clockwise, it will wind up the pull rope 437 (i.e., the pull rope 437 located on the left side), thereby allowing the sliding frame 431 to move from right to left. It is worth noting that during this process, the third motor 436 needs to control the winding wheel on it to rotate counterclockwise to unwind the pull rope 437 (i.e., the pull rope 437 located on the right side) on the winding wheel, so as to avoid the pull rope 437 on the right side restricting the movement of the sliding frame 431. Conversely, when the third motor 436 controls the winding wheel connected to it to rotate clockwise, it will wind up the pull rope 437 (i.e., the pull rope 437 located on the right side), at which time the sliding frame 431 will move from left to right, and during this process, the second motor 435 needs to unwind the pull rope 437 on the left side.

[0032] Both sides of the bottom wall of the control box 41 are equipped with long crossbars 438 that are adapted to the transverse groove via support rods, and the replacement oil suction filter 35 is slidably installed on the long crossbars 438. Specifically, during the initial installation phase, the replacement suction filter 35 needs to be placed on the pusher 432. It is worth noting that the rightmost pusher 432 should be empty. Then, the sliding frame 431 is aligned with the limiting slide groove and pushed into the operating box 41 (the sliding frame 431 is pushed in from the left side of the operating box 41). During the pushing process, the suction filter 35 will slide and be installed on the long horizontal bar 438 through the horizontal groove. After the leftmost suction filter 35 enters the operating box 41, the pull rope 437 is fixed to the connecting seat through the stud. At this time, the sealing door is closed. In this state, the empty pusher 432 on the rightmost side will be in the middle position of the inner cavity of the operating box 41, that is, the position after the suction filter 35 installed on the mounting bracket 32 ​​has moved into the operating box 41.

[0033] When replacing the suction filter 35 on the mounting bracket 32, the mounting bracket 32 ​​and the suction filter 35 on it are gradually moved backward into the operating box 41 by the guide rod 42. The movement stops after the front seat 36 is inserted into the inlet / outlet slot. During the movement, the end of the mounting bracket 32 ​​connected to the guide rod 42 will push the two empty pushers 432 and the rear blocking plate 433 to rotate backward in sequence. After the end of the mounting bracket 32 ​​is no longer in contact with the pushers 432, the rear side blocking plate 433 is driven to rotate forward again to the vertical position under the action of the torsion spring 434. During the process, the pushers 432 are pushed back to the vertical position. At this time, the empty pushers 432 will be below the suction filter 35 to be replaced.

[0034] Next, by starting the first motor 46, the shaft 44 is driven to rotate the rotating seat 33 and the oil suction filter 35 by 90°, so that the short crossbar 34 rotates from a vertical state to a horizontal state, thus releasing the restriction on the movement of the oil suction filter 35. Then, the third motor 436 winds up the pull rope 437 on the right side, so that the sliding frame 431 moves from left to right. During this process, the pusher 432 under the oil suction filter 35 to be replaced will push it to move from left to right, disengaging from the mounting bracket 32. At the same time, the next new oil suction filter 35 is pushed onto the mounting bracket 32. After being pushed in, the first motor 46 drives the shaft 44 to rotate the rotating seat 33 and the oil suction filter 35 by 90°, so that the short crossbar 34 rotates from a horizontal state to a vertical state. At this time, the restriction after the new oil suction filter 35 is installed is completed.

[0035] Finally, the mounting bracket 32 ​​is pulled from the control box 41 back into the oil tank 10 by the electric push rod 45. During the movement, the end of the mounting bracket 32 ​​connected to the guide rod 42 will push the two push brackets 432 below the filter and the blocking plate 433 on the front side to rotate forward in sequence. After the end of the mounting bracket 32 ​​is no longer in contact with the push bracket 432, the side blocking plate 433 on the front side will be driven to rotate backward to the vertical position under the action of the torsion spring 434. During the process, the push bracket 432 is pushed back to the vertical position. The subsequent disassembly and assembly process can be repeated.

[0036] Specifically, after the last new suction filter 35 is installed in the mounting bracket 32, all the replaced suction filters 35 are now on the pusher 432. At the same time, the sliding frame 431 and the pusher 432 are on the right side of the inner cavity of the control box 41. In this state, open the right-side sealing door to pull the sliding frame 431 outward, then remove the replaced suction filter 35 and put the new suction filter 35 back in. Note that the leftmost pusher 432 should be left empty at this time. Then push the sliding frame 431 into the control box 41 and close the sealing door. At this time, in the next replacement operation, the sliding frame 431 should be left empty and moved from right to left. That is, the initial operation should be reversed, and so on.

[0037] Finally, it should be noted that, as Figure 3 and Figure 8 As shown, the outer walls of the oil tank 10 and the control box 41 are provided with inlet and outlet slots that are compatible with the front end seat 36 and the mounting bracket 32. The outer walls of the front end seat 36 and both ends of the mounting bracket 32 ​​are fitted with sealing rings 37 so that the front end seat 36 and the mounting bracket 32 ​​can block the inlet and outlet. It is worth noting that the inlet and outlet slots on the two housings are connected, and the inner walls between the housings are in a sealed state. In particular, in the initial state, the tail end of the mounting bracket 32 ​​is inserted into the two inlet and outlet slots to block them, while the rest is in the guide bracket 31. During replacement, the guide rod 42 moves the mounting bracket 32 ​​and the oil suction filter 35 on it into the operating housing 41, and the front end seat 36 is inserted into the inlet and outlet slots. In both states, the inlet and outlet slots can be blocked, preventing oil in the oil tank 10 from entering the operating housing 41 during use, and also preventing oil in the oil tank 10 from entering the operating housing 41 during filter replacement.

[0038] It is worth noting that during the replacement and reset phases, when the front end seat 36 moves into or out of the inlet / outlet slot, even if the movement speed is fast, a small amount of oil will enter the operating box 41 through the inlet / outlet slot. However, this oil will not affect the replacement process. At the same time, a discharge pipe is installed at the bottom of the operating box 41, and a control valve is provided at the end of the discharge pipe.

[0039] During the replacement phase, after the front seat 36 blocks the inlet and outlet slots, the oil entering the control box 41 can be drained by opening the control valve, or the control valve can be opened during the movement to drain the oil entering the control box 41 in real time. Alternatively, the control valve can be opened after the oil suction filter 35 is replaced. It should be noted that the discharged oil can be collected during the discharge process to observe its quality, reflecting the quality of the oil in the oil tank 10. Alternatively, the collected oil can be re-injected into the oil tank 10. During the reset phase, after the inlet and outlet slots are sealed at the tail end of the mounting bracket 32, the above-mentioned oil discharge operation can be repeated. It is worth noting that this replacement process requires opening the oil tank 10 to prevent dust and other impurities in the air from entering the oil tank 10 when replacing the oil suction filter 35, thereby avoiding contamination of the oil in the oil tank 10.

[0040] Specifically, the hydraulic system of the wheel clamp of this ship unloader operates / is used as follows: 1. Initial installation stage: Slide the replacement oil suction filter 35 onto the long horizontal bar 438, ensuring that the rightmost push frame 432 is empty. Push it in along the inverted T-shaped limit groove on the bottom wall of the control box 41 through the limit slide strip of the slide frame 431, so that the horizontal groove of the oil suction filter 35 is fully engaged with the long horizontal bar 438. Connect the pull rope 437 to the connecting seat studs at both ends of the slide frame 431. Close the sealing doors at both ends of the control box 41 to complete the system initialization.

[0041] 2. Filter replacement procedure: Start the electric push rod 45, push the guide rod 42 to make the mounting bracket 32 ​​enter the control box 41 from the oil tank 10 until the front end seat 36 is inserted into the inlet and outlet slot; Start the first motor 46, which drives the rotating seat 33 to rotate 90° through the shaft 44, so that the short crossbar 34 changes from a vertical state to a horizontal state, thereby releasing the movement restriction of the oil suction filter 35; The third motor 436 is started to wind up the right pull rope 437, while the second motor 435 unwinds the left pull rope 437, causing the slide frame 431 to move from left to right. The arc-shaped cylindrical contact surface of the push frame 432 pushes the oil suction filter 35 away from the mounting frame 32, and at the same time, the next new filter element is pushed onto the mounting frame 32. Restart the first motor 46 to turn the short crossbar 34 from the horizontal state back to the vertical state and fix the new oil suction filter 35. Start the electric push rod 45, pull the guide rod 42 to make the mounting bracket 32 ​​return to the oil tank 10, and the front end seat 36 re-seals the inlet and outlet slots, completing the replacement cycle.

[0042] 3. Maintenance and cleaning process: After all the suction filters 35 have been replaced, open the right sealing door of the control box 41, pull out the slide frame 431 to remove the old filter element, drain the residual oil in the control box 41 through the discharge pipe and control valve, collect oil samples for quality testing, and after cleaning, reinstall the new suction filter 35 on the long crossbar 438, leave the leftmost push frame 432 empty, push in the slide frame 431 and close the sealing door to prepare for the next round of replacement operation.

[0043] 4. Oil Management Operation: Add oil through the oil inlet on the upper surface of the oil tank 10, and monitor the oil level in real time with the level gauge. The oil discharged during the replacement process can be collected through the discharge pipe. After analyzing the oil quality, it is decided whether to refill the oil tank 10, thus forming a closed-loop oil management system.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydraulic system for a ship unloader wheel clamp, comprising an oil tank (10) and a pump assembly (20) assembled within the oil tank (10), wherein a valve group (11) is mounted on the oil tank (10), an accumulator (12) is mounted on the outer wall of the oil tank (10), the accumulator (12) is connected to the valve group (11) via a connecting pipe, the pump assembly (20) includes an electric motor (21) mounted on the oil tank (10), and an oil pump (22) connected to the output end of the electric motor (21) is assembled within the oil tank (10), characterized in that, The oil pump (22) is connected to an oil suction filter unit (30) via an oil suction pipe (23) at its input end. The oil suction filter unit (30) includes a guide frame (31) fixed inside the oil tank (10), a mounting frame (32) is inserted into the guide frame (31), and an oil suction filter (35) is installed inside the mounting frame (32). The oil tank (10) is equipped with a replacement unit (40) on its outer wall. The replacement unit (40) includes an operating box (41). The mounting bracket (32) enters the operating box (41) via a guide rod (42) inserted into the operating box (41). The oil suction filter (35) that follows the mounting bracket (32) into the operating box (41) is disassembled and installed via a push assembly (43) that is slidably installed on the bottom wall of the operating box (41). The oil suction filter unit (30) also includes a rotating seat (33) rotatably connected to the two inner side walls of the mounting bracket (32). A short crossbar (34) is fixed on the rotating seat (33). Both ends of the oil suction filter (35) are provided with cross grooves that are adapted to the short crossbar (34), so that the oil suction filter (35) can be inserted between the two rotating seats (33). The inner top wall and inner bottom wall of the mounting bracket (32) are provided with arc-shaped grooves on both sides for the short crossbar (34) to pass through. One side wall of the arc-shaped groove is provided with a mounting hole. A spherical limiting post (38) is connected to the mounting hole by a spring. Both ends of the short crossbar (34) are provided with limiting grooves that match the spherical limiting post (38), so that the rotating seat (33) can be restricted within the mounting bracket (32) after rotating 90°.

2. The hydraulic system for a ship unloader wheel clamp according to claim 1, characterized in that, One end of the guide rod (42) is inserted into the operating box (41) and fixed to the mounting bracket (32). A shaft (44) is inserted into the guide rod (42) through a through hole. One end of the shaft (44) passes through the guide rod (42) and the mounting bracket (32) and is fixed to one of the rotating seats (33).

3. The hydraulic system for a ship unloader wheel clamp according to claim 2, characterized in that, The replacement unit (40) also includes an electric push rod (45) mounted on the replacement unit (40). One end of the electric push rod (45) is bolted to the end of the guide rod (42) located outside the operation box (41). The end of the guide rod (42) located outside the operation box (41) is equipped with a first motor (46). The output end of the first motor (46) is connected to one end of the shaft (44).

4. The hydraulic system for a ship unloader wheel clamp according to claim 3, characterized in that, The pushing assembly (43) includes a sliding frame (431) slidably connected to the bottom wall of the operating box (41). A pusher (432) is rotatably connected to the sliding frame (431) via a mounting seat. Positioning seats are fixed on both sides of the mounting seat. A blocking plate (433) is rotatably connected to the positioning seat. A torsion spring (434) is sleeved on both ends of the blocking plate (433) that passes through the positioning seat. Sealing doors are rotatably connected to both ends of the operating box (41) via hinges. The second motor (435) and the third motor (436) are respectively mounted on both sides of the upper surface of the operation box (41). The output ends of the second motor (435) and the third motor (436) are equipped with rollers, and pull ropes (437) are wound on the rollers. One end of the two pull ropes (437) is inserted into the operation box (41) and fixed to both ends of the slide frame (431).

5. The hydraulic system for a ship unloader wheel clamp according to claim 4, characterized in that, Both sides of the bottom wall of the control box (41) are equipped with long horizontal bars (438) that are compatible with the horizontal groove through support rods, and the replacement oil suction filter (35) is slidably installed on the long horizontal bars (438).

6. The hydraulic system for a ship unloader wheel clamp according to claim 1, characterized in that, One side of the mounting bracket (32) is fixedly connected to the front end seat (36) through a suction hole, and one end of the oil suction pipe (23) is fixedly connected to the front end seat (36).

7. The hydraulic system for a ship unloader wheel clamp according to claim 6, characterized in that, The outer walls of the oil tank (10) and the control box (41) are provided with inlet and outlet slots that are compatible with the front end seat (36) and the mounting bracket (32). The outer walls of the front end seat (36) and both ends of the mounting bracket (32) are fitted with sealing rings (37) so that the front end seat (36) and the mounting bracket (32) can block the inlet and outlet.

8. The hydraulic system for a ship unloader wheel clamp according to claim 1, characterized in that, The output end of the oil pump (22) is connected to the valve group (11) through the oil delivery pipe. The oil tank (10) is equipped with a right return oil filter. One end of the valve group (11) is connected to the return oil filter through the return oil pipe. The upper surface of the oil tank (10) is provided with an oil filling port on the side near the return oil filter.

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