Lifting device for cylinder sleeve piston rod assembly of ship engine

Abstract

The invention belongs to the technical field of ship engines, and discloses a ship engine cylinder sleeve piston rod assembly hoisting device. A plurality of lifting holes (5) are formed in the lifting row (1) at intervals, each lifting hole (5) is connected with a chain block (2), a lower lifting hook (6) of each chain block (2) is connected with a lower shackle (7), and when the engine cylinder sleeve piston rod assembly (8) is lifted, different hoops (3) are arranged to be of a structure capable of being arranged on different portions of a piston rod (9) of the engine cylinder sleeve piston rod assembly (8) in a sleeved mode. And a lower shackle (7) connected with a lower lifting hook (6) of each chain block (2) is arranged to be of a structure of which the height from the engine (4) can be adjusted. According to the hoisting device for the ship engine cylinder sleeve piston rod assembly, hoisting and transportation of a cylinder sleeve piston rod can be completed in narrow and complex spaces such as a ship engine cabin, and the replacement requirement is met.

Description

Technical Field

[0001] This invention belongs to the field of marine engine technology, and more specifically, relates to a lifting device for a marine engine cylinder liner piston rod assembly. Background Technology

[0002] With the continuous development of the shipbuilding industry, hoisting technology has evolved from early lifting equipment and manual operation to today's high-precision cranes and matching hoisting fixtures, making normal hoisting no longer a problem. The cylinder liner piston rod assembly is a crucial component in key equipment such as marine engines. It connects the piston and crankshaft and withstands enormous pressure and impact forces during engine operation. Its normal operation is vital to the stability and reliability of the ship's power system. However, due to the large size and heavy weight of marine piston rods, and their installation location in narrow and complex spaces such as the ship's engine room, insufficient hoisting space can arise during ship construction, repair, and maintenance, making it impossible to remove them from the cylinder liner or properly lift them out of the engine room for replacement. Therefore, specialized hoisting equipment and techniques are required to achieve accurate installation and removal of the piston rod.

[0003] Existing technology includes a device titled "A Ship Lifting Device" with publication number CN116135766A. This device discloses a ship lifting device comprising a base in an L-shape. A hydraulic rod is mounted on one outer wall of the top of the base. One end of the piston rod of the hydraulic rod is connected to a top plate via screws. Support rods are fixed to both outer walls on the other side of the bottom of the top plate. Sliding plates are fixed to the bottom outer walls of the support rods. Slide rails are provided on both outer walls on the other side of the top of the base. The sliding plates are slidably connected to the slide rails. A motor is mounted on one inner wall of the base. One end of the output shaft of the motor is connected to a take-up roller via a coupling. A traction rope is wound around the outer wall of the take-up roller. A support plate is fixed to the other outer wall of the traction rope. This invention allows for simultaneous lifting on one side and support on the other side. The lifting structure facilitates suspension and clamping, has a wide range of applications, and can also clamp suspended items to ensure stability, thus improving the efficiency of the lifting device. However, this technology does not address the technical issues and solutions of this application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hoisting device for cylinder liner piston rod assemblies of ships that can be hoisted and transported in narrow and complex spaces such as ship engine rooms to meet replacement requirements, in order to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] This invention relates to a hoisting device for a marine engine cylinder liner piston rod assembly, comprising a hoisting platform, multiple hand-operated hoists, and multiple clamps. The hoisting platform is located above the engine, and multiple lifting holes are arranged on the hoisting platform at intervals. Each lifting hole is connected to a hand-operated hoist, and the lower hook of each hand-operated hoist is connected to a lower shackle. When hoisting the engine cylinder liner piston rod assembly, different clamps are configured to fit onto different parts of the piston rod of the engine cylinder liner piston rod assembly. The lower shackle connected to the lower hook of each hand-operated hoist is configured to be adjustable in height from the engine, and each lower shackle is configured to connect to a corresponding clamp.

[0007] The upper hook of each chain hoist is connected to a corresponding lifting hole on the hoisting bar via an upper shackle.

[0008] The upper part of the suspension rack is provided with an upper lifting hole in the middle position. The upper lifting hole is connected to the lower end of the suspension chain, and the upper end of the suspension chain is connected to the travel motor. The travel motor is movably mounted on the crossbeam, and the drive gear of the travel motor meshes with the teeth on the crossbeam.

[0009] When hoisting the engine cylinder liner piston rod assembly, the engine cylinder liner piston rod assembly is partially removed from the engine. The first hand chain hoist, counting from one end of the hoisting block, is lowered. The clamp connected to the first hand chain hoist is connected to the piston rod of the engine cylinder liner piston rod assembly near the upper part. The first hand chain hoist, counting from one end of the hoisting block, is raised and the engine cylinder liner piston rod assembly is pulled upward.

[0010] Lower the second chain hoist from one end of the hoisting device. The lowering height of the clamp connected to the second chain hoist is lower than the height of the clamp connected to the first chain hoist. The clamp connected to the second chain hoist is connected to the piston rod of the engine cylinder liner piston rod assembly near the middle position. Raise the first and second chain hoists and continue to lift the engine cylinder liner piston rod assembly upward.

[0011] The third chain hoist, counting from one end of the hoisting device, is lowered. The lowering height of the clamp connected to the third chain hoist is lower than the height of the clamp connected to the first chain hoist and the clamp connected to the second chain hoist. The clamp connected to the third chain hoist connects to the piston rod of the engine cylinder liner piston rod assembly near the lower part. The first, second, and third chain hoists are raised, and the engine cylinder liner piston rod assembly is pulled upwards until it leaves the engine.

[0012] After the engine cylinder liner piston rod assembly leaves the engine, stop raising the first hand chain hoist, then raise the second and third hand chain hoists until their heights are equal to the height of the first hand chain hoist, then stop raising the second and third hand chain hoists.

[0013] Control the travel motor to move along the crossbeam. The movement of the travel motor drives the engine cylinder liner piston rod assembly to move. Once the assembly is above the placement area, control the first, second, and third hand chain hoists to descend synchronously, placing the engine cylinder liner piston rod assembly into the placement area, thus completing the hoisting operation.

[0014] The clamp mentioned is a circular clamp.

[0015] The hoisting rack has three hoisting holes: the first hoisting hole is located at the lower left end of the rack, the second hoisting hole is located at the lower middle end of the rack, and the third hoisting hole is located at the lower right end of the rack.

[0016] The working principle and beneficial effects of the technical solution adopted in this invention are as follows:

[0017] The ship engine cylinder liner piston rod assembly hoisting device of this invention is structurally designed to be located inside the ship's engine room. Due to the limited space in the engine room, a long, narrow hoisting platform is used, horizontally positioned above the engine. A crossbeam is positioned above the hoisting platform. When the travel motor rotates in different directions, the drive gear of the travel motor meshes with the teeth on the crossbeam, allowing the travel motor to move along the crossbeam in different directions, thus enabling the hoisting platform to move horizontally and flexibly enter and exit the engine room. When hoisting the engine cylinder liner piston rod assembly, the travel motor instructs the hoisting platform to move to a position above the engine. Then, the operator moves part of the engine cylinder liner piston rod assembly out of the engine. The first hand-operated hoist is lowered, its clamp connecting to the upper part of the piston rod of the engine cylinder liner piston rod assembly, thus connecting the first hand-operated hoist to the engine cylinder liner piston rod assembly. Then, the first hand-operated hoist is raised, pulling the engine cylinder liner piston rod assembly upwards. Next, the second chain hoist is lowered, with the clamp connected to the second hoist lowered to a height lower than the clamp connected to the first chain hoist. The clamp connected to the second chain hoist connects to the piston rod of the engine cylinder liner piston rod assembly near the middle. The first and second chain hoists are then raised, continuing to lift the engine cylinder liner piston rod assembly. Then, the third chain hoist is lowered, with the clamp connected to the third chain hoist lowered to a height lower than both the clamps connected to the first and second chain hoists. The clamp connected to the third chain hoist connects to the piston rod of the engine cylinder liner piston rod assembly near the lower part. The first, second, and third chain hoists are then raised, continuing to pull the engine cylinder liner piston rod assembly upwards, disengaging it from the engine. At this point, stop raising the first chain hoist, then raise the second and third chain hoists until their heights are equal to the first. Stop raising the second and third chain hoists. Control the travel motor to move along the crossbeam. The travel motor's movement drives the engine cylinder liner piston rod assembly to move above the engine cylinder liner piston rod assembly placement area. Control the first, second, and third chain hoists to lower synchronously, placing the engine cylinder liner piston rod assembly into the placement area, completing the hoisting operation. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the structure of the marine engine cylinder liner piston rod assembly hoisting device described in this invention;

[0020] Figure 2 This is a schematic diagram of the structure of the marine engine cylinder liner piston rod assembly hoisting device described in this invention when hoisting the engine cylinder liner piston rod assembly;

[0021] The labels in the attached diagram are as follows: 1. Lifting bar; 2. Hand chain hoist; 3. Clamp; 4. Engine; 5. Lifting hole; 6. Lower hook; 7. Lower shackle; 8. Engine cylinder liner piston rod assembly; 9. Piston rod; 10. Upper hook; 11. Upper shackle; 12. Upper lifting hole; 13. Lifting chain; 14. Travel motor; 15. Crossbeam; 16. First hand chain hoist; 17. Second hand chain hoist; 18. Third hand chain hoist. Detailed Implementation

[0022] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0023] As attached Figure 1 Appendix Figure 2As shown, this invention is a hoisting device for a marine engine cylinder liner piston rod assembly, including a hoisting platform 1, multiple hand-operated hoists 2, and multiple clamps 3. The hoisting platform 1 is located above the engine 4. Multiple lifting holes 5 are arranged at intervals on the hoisting platform 1, and each lifting hole 5 connects to a hand-operated hoist 2. The lower hook 6 of each hand-operated hoist 2 connects to a lower shackle 7. When hoisting the engine cylinder liner piston rod assembly 8, different clamps 3 are configured to fit onto different parts of the piston rod 9 of the engine cylinder liner piston rod assembly 8. The lower shackle 7 connected to the lower hook 6 of each hand-operated hoist 2 is configured to be adjustable in height from the engine 4, and each lower shackle 7 is configured to connect to a corresponding clamp 3. An upper lifting hole 12 is provided at the upper middle position of the hoisting platform 1, connecting to the lower end of a lifting chain 13. The upper end of the lifting chain 13 connects to a travel motor 14, which is movably mounted on a crossbeam 15. The drive gear of the travel motor 14 meshes with the teeth on the crossbeam 15. The above structure addresses the shortcomings of existing technologies by proposing an improved technical solution. In the structural design, the lifting device for the ship's engine cylinder liner piston rod assembly is located inside the ship's engine room. Due to the limited space inside the engine room, a long, narrow lifting platform 1 is arranged horizontally above the engine 4. A crossbeam 15 is positioned above the lifting platform 1. When the travel motor 14 is controlled to rotate in different directions, the drive gear of the travel motor meshes with the teeth on the crossbeam 15, enabling the travel motor to move along the crossbeam in different directions. This allows the lifting platform to move horizontally, thus facilitating flexible entry and exit from the engine room. When hoisting the engine cylinder liner piston rod assembly 8, the travel motor instructs the hoisting device to move to a position above the engine. Then, the operator partially removes the engine cylinder liner piston rod assembly 8 from the engine. The first hand-operated hoist 16 is lowered, and its clamp 3 connects to the upper part of the piston rod 9 of the engine cylinder liner piston rod assembly 8, thus connecting the first hand-operated hoist to the engine cylinder liner piston rod assembly 8. Then, the first hand-operated hoist 16 is raised, pulling the engine cylinder liner piston rod assembly 8 upwards. Next, the second hand-operated hoist 17 is lowered, with the clamp 3 connected to the second hand-operated hoist 17 lowered to a height lower than the clamp 3 connected to the first hand-operated hoist 16. The clamp 3 connected to the second hand-operated hoist 17 connects to the piston rod 9 of the engine cylinder liner piston rod assembly 8 to a position near the middle. The first hand-operated hoist 16 and the second hand-operated hoist 17 are then raised, continuing to lift the engine cylinder liner piston rod assembly 8 upwards.Next, the third chain hoist 18 is lowered. The lowering height of the clamp 3 connected to the third chain hoist 18 is lower than the height of the clamp 3 connected to the first chain hoist 16 and the clamp 3 connected to the second chain hoist 17. The clamp 3 connected to the third chain hoist 18 is connected to the piston rod 9 of the engine cylinder liner piston rod assembly 8 near the lower part. The first chain hoist 16, the second chain hoist 17, and the third chain hoist 18 are then raised, and the engine cylinder liner piston rod assembly 8 is pulled upwards, separating from the engine 4. At this point, the raising of the first chain hoist 16 is stopped, and the second chain hoist 17 and the third chain hoist 18 are raised until their heights are equal to the height of the first chain hoist 16. The raising of the second chain hoist 17 and the third chain hoist 18 is then stopped. The travel motor 14 moves along the crossbeam 15, causing the engine cylinder liner piston rod assembly 8 to move. Once the assembly is positioned above the designated placement area, the first hand-operated hoist 16, the second hand-operated hoist 17, and the third hand-operated hoist 18 are simultaneously lowered to place the engine cylinder liner piston rod assembly 8 into the designated placement area, completing the hoisting operation. The marine engine cylinder liner piston rod assembly hoisting device described in this invention enables the hoisting and transportation of cylinder liner piston rods in narrow and complex spaces such as ship engine rooms, meeting replacement requirements.

[0024] Each chain hoist 2 has an upper hook 10 connected to a corresponding lifting hole 5 on the hoisting block 1 via an upper shackle 11. In this structure, the upper shackle 11 is used to hook and connect the upper hook, and the upper shackle 11 connects to the lifting hole 5, reliably enabling the connection of the chain hoist 2.

[0025] When hoisting the engine cylinder liner piston rod assembly 8, the engine cylinder liner piston rod assembly 8 is partially removed from the engine. The first hand-operated hoist 16, counting from one end of the hoisting block 1, is lowered. The clamp 3 connected to the first hand-operated hoist 16 connects to the piston rod 9 of the engine cylinder liner piston rod assembly 8 near the upper part. The first hand-operated hoist 16, counting from one end of the hoisting block 1, is raised, pulling the engine cylinder liner piston rod assembly 8 upwards. The second hand-operated hoist 17, counting from one end of the hoisting block 1, is lowered. The clamp 3 connected to the second hand-operated hoist 17 is lowered to a height lower than the clamp 3 connected to the first hand-operated hoist 16. The clamp 3 connected to the second hand-operated hoist 17 connects to the piston rod 9 of the engine cylinder liner piston rod assembly 8 near the middle part. The first hand-operated hoist 16 and the second hand-operated hoist 17 are raised, continuing to lift the engine cylinder liner piston rod assembly 8 upwards. The third chain hoist 18, counting from one end of the hoisting bar 1, is lowered. The lowering height of the clamp 3 connected to the third chain hoist 18 is lower than the height of the clamp 3 connected to the first chain hoist 16 and the clamp 3 connected to the second chain hoist 17. The clamp 3 connected to the third chain hoist 18 is connected to the piston rod 9 of the engine cylinder liner piston rod assembly 8 near its lower part. The first chain hoist 16, the second chain hoist 17, and the third chain hoist 18 are then raised, and the engine cylinder liner piston rod assembly 8 is pulled upwards until it leaves the engine 4. After the engine cylinder liner piston rod assembly 8 leaves the engine 4, the raising of the first chain hoist 16 stops. The raising of the second chain hoist 17 and the third chain hoist 18 continues until their heights are equal to the height of the first chain hoist 16. The raising of the second chain hoist 17 and the third chain hoist 18 then stops. The travel motor 14 moves along the crossbeam 15, causing the engine cylinder liner piston rod assembly 8 to move. Once the assembly is positioned above the designated placement area, the first hand-operated hoist 16, the second hand-operated hoist 17, and the third hand-operated hoist 18 are simultaneously lowered to place the engine cylinder liner piston rod assembly 8 into the designated placement area, completing the hoisting operation. Replacing the engine cylinder liner piston rod assembly 8 is achieved by reversing the steps. This invention relates not only to a hoisting device for marine engine cylinder liner piston rod assemblies but also to a method of using such a device, effectively meeting hoisting requirements.

[0026] The clamp 3 is a circular clamp. In the above structure, clamp 3 is a circular structure comprising two semi-circular components. One end of the two semi-circular components is movably connected by a connecting pin, and the other end of the two semi-circular components can pass through a bolt. When it is necessary to connect the piston rod via the clamp, first loosen the bolt, then slip the two semi-circular components onto the piston rod, and then tighten the bolt to reliably connect the clamp to the piston rod, with different clamps fixedly connected to different positions on the piston rod.

[0027] The lifting platform 1 has three lifting holes 5. The first lifting hole 5 is located at the lower left end of the lifting platform 1, the second lifting hole 5 is located at the lower middle end of the lifting platform 1, and the third lifting hole 5 is located at the lower right end of the lifting platform 1. The number of lifting holes can be adjusted according to the piston rod length, corresponding to the number of hand chain hoists required. Because when the engine cylinder liner piston rod assembly 8 is pulled out from the engine 4, the engine cylinder liner piston rod assembly 8 will gradually tilt, and then different clamps will connect to different positions on the piston rod, facilitating lifting.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A hoisting device for a marine engine cylinder liner piston rod assembly, characterized in that: The system includes a hoisting bar (1), multiple chain hoists (2), and multiple clamps (3). The hoisting bar (1) is located above the engine (4). Multiple lifting holes (5) are set on the hoisting bar (1) at intervals. Each lifting hole (5) is connected to a chain hoist (2). The lower hook (6) of each chain hoist (2) is connected to a lower shackle (7). When hoisting the engine cylinder liner piston rod assembly (8), different clamps (3) are configured to fit onto different parts of the piston rod (9) of the engine cylinder liner piston rod assembly (8). The lower shackle (7) connected to the lower hook (6) of each chain hoist (2) is configured to be adjustable in height from the engine (4). Each lower shackle (7) is configured to be connected to a corresponding clamp (3).

2. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The upper hook (10) of each chain hoist (2) is connected to a corresponding lifting hole (5) on the hoisting bar (1) by an upper shackle (11).

3. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The upper part of the hoisting rack (1) is provided with an upper hoisting hole (12) in the middle position. The upper hoisting hole (12) is connected to the lower end of the hoisting chain (13). The upper end of the hoisting chain (13) is connected to the walking motor (14). The walking motor (14) is movably mounted on the crossbeam (15). The drive gear of the walking motor (14) meshes with the teeth on the crossbeam (15).

4. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: When hoisting the engine cylinder liner piston rod assembly (8), the engine cylinder liner piston rod assembly (8) is partially removed from the engine. The first hand chain hoist (16) from one end of the hoisting bar (1) is lowered, and the clamp (3) connected to the first hand chain hoist (16) is connected to the piston rod (9) of the engine cylinder liner piston rod assembly (8) near the upper part. The first hand chain hoist (16) from one end of the hoisting bar (1) is raised, and the engine cylinder liner piston rod assembly (8) is pulled out upward.

5. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The second chain hoist (17) is lowered from one end of the hoist (1). The lowering height of the clamp (3) connected to the second chain hoist (17) is lower than the height of the clamp (3) connected to the first chain hoist (16). The clamp (3) connected to the second chain hoist (17) is connected to the piston rod (9) of the engine cylinder liner piston rod assembly (8) near the middle position. The first chain hoist (16) and the second chain hoist (17) are raised, and the engine cylinder liner piston rod assembly (8) is raised further.

6. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The third hand chain hoist (18) is lowered from one end of the hoist (1). The lowering height of the clamp (3) connected to the third hand chain hoist (18) is lower than the height of the clamp (3) connected to the first hand chain hoist (16) and the clamp (3) connected to the second hand chain hoist (17). The clamp (3) connected to the third hand chain hoist (18) is connected to the piston rod (9) of the engine cylinder liner piston rod assembly (8) near the lower part. The first hand chain hoist (16), the second hand chain hoist (17) and the third hand chain hoist (18) are raised. The engine cylinder liner piston rod assembly (8) is pulled out upwards and the engine cylinder liner piston rod assembly (8) is removed from the engine (4).

7. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: After the engine cylinder liner piston rod assembly (8) leaves the engine (4), stop raising the first hand chain hoist (16), raise the second hand chain hoist (17) and the third hand chain hoist (18) until the height of the second hand chain hoist (17) and the third hand chain hoist (18) is equal to the height of the first hand chain hoist (16), and stop raising the second hand chain hoist (17) and the third hand chain hoist (18).

8. The hoisting device for marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: Control the travel motor (14) to travel along the crossbeam (15). The movement of the travel motor (14) drives the engine cylinder liner piston rod assembly (8) to move. When it moves above the engine cylinder liner piston rod assembly placement area, control the first hand chain hoist (16), the second hand chain hoist (17) and the third hand chain hoist (18) to descend synchronously and place the engine cylinder liner piston rod assembly (8) in the engine cylinder liner piston rod assembly placement area to complete the hoisting operation.

9. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The clamp (3) mentioned above is a circular clamp.

10. The hoisting device for the marine engine cylinder liner piston rod assembly according to claim 1, characterized in that: The hoisting rod (1) has three hoisting holes (5). The first hoisting hole (5) is located at the lower part of the hoisting rod (1) near the left end. The second hoisting hole (5) is located at the lower part of the hoisting rod (1) near the middle. The third hoisting hole (5) is located at the lower part of the hoisting rod (1) near the right end.

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