A shore-based container crane self-lifting device

Abstract

The application relates to a self-lifting device of a shore-based container crane, and relates to the technical field of lifting and hoisting. In order to solve the height limitation problem of traditional STS assembly transportation, the self-lifting device comprises four groups of symmetrically arranged lifting mechanisms, the lifting mechanism comprises an upper pulley frame arranged at the top of a lower structure of the STS, a lower pulley frame arranged at an upper structure of the STS, a broken-line winding drum, a motor and a steel wire rope; the broken-line winding drum is rotationally installed at the bottom of the lower structure of the STS, a transmission mechanism is arranged between the motor and the broken-line winding drum, one end of the steel wire rope is wound on the broken-line winding drum, and the other end of the steel wire rope is fixedly connected after sequentially penetrating through the upper pulley frame and the lower pulley frame. The application has the effects that the lifting height can be adapted to various lifting heights, the lifting capacity is high, the transfer is convenient, and the standard container transportation requirements can be met.

Description

Technical Field

[0001] This application relates to the field of lifting and hoisting technology, and in particular to a self-lifting device for a quay container crane. Background Technology

[0002] With the recovery of the world economy and the rapid development of the shipping industry, container ships are gradually becoming larger. As the main force of port equipment, quay container cranes are the first hub connecting containers from ship to terminal, and they are also gradually becoming larger. The larger size of STS (Ship-to-Truck) makes its assembly and installation more difficult and requires higher capabilities from the lifting equipment.

[0003] Traditional STS assembly methods mostly involve using floating cranes for hoisting operations, followed by roll-on / roll-off transport of the entire unit to ports around the world. This method of transporting the entire unit to the user's terminal has advantages such as short terminal occupation time and fast on-site delivery and commissioning, making it widely favored by users. However, some customer terminals have height restrictions on their transport routes due to high-altitude obstacles, and the increasingly large STS units have exceeded these height restrictions, making them impassable. Therefore, improvements are needed. Utility Model Content

[0004] To address the height restrictions in traditional STS (Surface Mount Technology) assembly and transportation, this application provides a self-lifting device for quayside container cranes.

[0005] The self-lifting device for a quayside container crane provided in this application adopts the following technical solution: A self-lifting device for a quayside container crane includes four symmetrically arranged lifting mechanisms. Each lifting mechanism includes an upper pulley frame arranged on the top of the lower structure of the STS, a lower pulley frame arranged on the upper structure of the STS, a zigzag drum, a motor, and a wire rope. The zigzag drum is rotatably installed at the bottom of the lower structure of the STS. A transmission mechanism is provided between the motor and the zigzag drum. One end of the wire rope is wound around the zigzag drum, and the other end of the wire rope passes through the upper pulley frame and the lower pulley frame in sequence and is then fixedly connected.

[0006] By adopting the above technical solution, including four sets of symmetrically arranged lifting mechanisms, the lifting mechanism includes an upper pulley frame, a lower pulley frame, a zigzag drum, a motor and a steel wire rope. The upper pulley frame is installed on the top of the lower structure of the STS, the lower pulley frame is installed on the upper structure of the STS, and the zigzag drum is driven by the motor to rotate through the transmission mechanism, thereby driving the steel wire rope to lift the lower structure of the STS. When height restrictions are encountered, a split-transport design is implemented. The upper and lower structures are folded and lowered for separate transport. Upon arrival at the dock, they are assembled using a self-lifting device. Once the lower structure is in place and the wire ropes and pulley blocks are arranged, the control system integrates and coordinates the four lifting mechanisms to achieve the lifting function of the STS upper structure. The motor is started, and the speed is reduced by a right-angle reducer and a built-in planetary reducer, while the torque is amplified. This drives the zigzag drum to slowly wind up the rope. The wire rope passes through the upper pulley frame and the lower pulley frame of the moving pulley block in sequence, and the upper structure is lifted smoothly until it reaches the appropriate height. The motor is then de-energized, and the drum brake immediately engages the brake drum to prevent the zigzag drum from rotating back. The ratchet and pawl automatically lock to completely prevent rope slippage accidents. After the upper structure is lifted to the installation height, it is assembled to restore the STS to its original form.

[0007] By improving the setup of the lifting mechanism, the transportation and assembly efficiency of ultra-large port machinery is enhanced. The four sets of lifting mechanisms, combined with the stepless speed regulation system of the zigzag drum, achieve linear and stable lifting of the wire rope, which can adapt to various lifting heights and has a strong lifting capacity. The maximum weight that can be used for lifting the STS superstructure reaches about 1400T. At the same time, it has a high degree of modularity, small structural volume, and convenient transfer, and can meet the requirements of standard container transportation.

[0008] Optionally, the two ends of the zigzag drum are respectively provided with bearing seats and front support seats for support, and the zigzag drum is rotatably connected to the bearing seats and front support seats.

[0009] By adopting the above technical solution, the bearing housing and the front support seat of the drum support the zigzag drum; the setting of the bearing housing and the front support seat of the drum improves the stability of the drum operation, effectively disperses the radial load when the drum rotates, and reduces axial movement.

[0010] Optionally, the bearing housing and the bottom of the drum front support are both provided with a support, which is connected to the bottom of the STS lower structure.

[0011] By adopting the above technical solution, the bearing housing and the front support of the drum are installed on the support; the support structure improves the structural reliability and provides an installation base for the bearing housing and the front support of the drum, making it convenient for disassembly and assembly.

[0012] Optionally, the input end of the zigzag drum is provided with a brake drum, and the support is provided with a drum brake for cooperating with the brake drum.

[0013] By adopting the above technical solution, the brake drum is installed at the input end of the zigzag drum, and the drum brake works in conjunction with the brake drum. The setting of the drum brake and the brake drum improves the braking safety of the self-lifting device of the ultra-large crane. Through the high-strength friction surface design of the brake drum, the rotational kinetic energy of the drum is effectively converted into heat energy and dissipated quickly, ensuring the stable output of braking force during heavy-load lifting.

[0014] Optionally, a ratchet is provided on the shaft of the zigzag drum, the ratchet is arranged on the side of the zigzag drum away from the brake drum, and a pawl is provided on the support for cooperating with the ratchet.

[0015] By adopting the above technical solution, the ratchet is installed on the shaft of the zigzag drum, and the pawl is installed on the support. The pawl cooperates with the ratchet. Through the setting of the ratchet and pawl, mechanical anti-reverse protection is provided for the self-lifting device of the ultra-large crane. Its multi-tooth unidirectional meshing structure can effectively lock the rotation direction of the drum, prevent the risk of load falling due to reverse rotation of the drum under heavy load, and improve the safety protection capability.

[0016] Optionally, the ratchet and pawl work together to form a one-way transmission mechanism, which only allows the zigzag drum to rotate in the winding direction and prevents the zigzag drum from rotating in the opposite direction.

[0017] By adopting the above technical solution, the ratchet and pawl work together to form a one-way transmission mechanism. Through the arrangement of the ratchet and pawl, the zigzag drum is only allowed to rotate in one direction along the winding direction. When the drum rotates counterclockwise due to accidental power failure, brake failure, or external impact, the pawl and the ratchet tooth groove form a mechanical stop, eliminating extreme safety risks such as heavy load falls and equipment overturning.

[0018] Optionally, the transmission mechanism includes a right-angle reducer and a built-in planetary reducer. The input end of the right-angle reducer is connected to the output shaft of the motor, the output end of the right-angle reducer is connected to the input end of the built-in planetary reducer, and the output end of the built-in planetary reducer is connected to the input end of the zigzag drum.

[0019] By adopting the above technical solution, the transmission mechanism includes a right-angle reducer and a built-in planetary reducer. Through the setting of the right-angle reducer and the built-in planetary reducer, the right-angle reducer effectively shortens the power transmission path. At the same time, through the optimized design of the gear meshing angle, the high-speed low-torque output of the motor is converted into a medium-speed medium-torque power flow, reducing the impact load of the subsequent transmission links. The built-in planetary reducer achieves a high reduction ratio and a large torque carrying capacity in a limited space, eliminating the risk of single-tooth overload.

[0020] Optionally, the upper pulley frame includes two sets of fixed pulleys, and the lower pulley frame includes two sets of movable pulleys; the winding path of the wire rope is led out from the zigzag drum, and sequentially passes around one fixed pulley of the upper pulley frame, one movable pulley of the lower pulley frame, another fixed pulley of the upper pulley frame, and another movable pulley of the lower pulley frame, finally fixing the rope end.

[0021] By adopting the above technical solution, one end of the wire rope is wound in the spiral groove on the surface of the zigzag drum, and the other end passes sequentially through the first fixed pulley of the upper pulley frame, the first movable pulley of the lower pulley frame, the second fixed pulley of the upper pulley frame, and the second movable pulley of the lower pulley frame; finally, the rope end is fixed to the anchor point of the lower structure to form a multiplier pulley group; through the setting of the upper pulley frame and the lower pulley frame, and through the multiplier pulley group formed by the upper pulley frame and the lower pulley frame, the lifting force of the crane is amplified in multiple stages, effectively dispersing the bending stress of the wire rope and ensuring the stability of the winding rope.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up the lifting mechanism, the transportation and assembly efficiency of ultra-large port machinery is improved. The four sets of lifting mechanisms are combined with the stepless speed regulation system of the zigzag drum to achieve linear and stable lifting of the wire rope. It can adapt to various lifting heights, has a strong lifting capacity, and can be used for lifting the maximum weight of the STS superstructure up to about 1400T. At the same time, it has a high degree of modularity, small structural volume, and convenient transfer, and can meet the requirements of standard container transportation. 2. By setting up a drum brake and brake drum, the braking safety of the self-lifting device of the ultra-large crane is improved. Through the high-strength friction surface design of the brake drum, the kinetic energy of the drum rotation is effectively converted into heat energy and dissipated quickly, ensuring stable output of braking force during heavy-load lifting. 3. The ratchet and pawl configuration provides mechanical anti-reverse protection for the self-lifting device of the ultra-large crane. Its multi-tooth unidirectional meshing structure can effectively lock the rotation direction of the drum, preventing the risk of load falling due to reverse rotation of the drum under heavy load, thus improving safety protection capabilities. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a self-lifting device for a quayside container crane in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the upper pulley frame in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the lower wheel frame in an embodiment of this application.

[0026] Figure 4 This is a schematic diagram illustrating the structure of the zigzag drum and the motor in the embodiments of this application. Figure 5 This is a schematic diagram illustrating the structure of the ratchet and pawl engagement in an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Lifting mechanism; 101. Upper pulley frame; 102. Lower pulley frame; 103. Zigzag drum; 104. Motor; 105. Wire rope; 2. Transmission mechanism; 201. Right-angle gearbox; 202. Built-in planetary gearbox; 3. Bearing housing; 4. Front support seat of the drum; 5. Support; 6. Brake drum; 7. Drum brake; 8. Ratchet; 9. Pawl. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] This application discloses a self-lifting device for a quayside container crane. (Refer to...) Figure 1 and Figure 4 The self-lifting device of the quay container crane includes four sets of symmetrically arranged lifting mechanisms 1. In this embodiment, the lifting mechanism 1 is used to lift the upper structure of the STS. The lifting mechanism 1 includes an upper pulley frame 101, a lower pulley frame 102, a zigzag drum 103, a motor 104 and a wire rope 105. The upper pulley frame 101 is installed on the top of the lower structure of the STS, and the lower pulley frame 102 is installed on the upper structure of the STS. Both the upper pulley frame 101 and the lower pulley frame 102 are detachable structures.

[0030] Reference Figure 2 and Figure 3 The upper pulley frame 101 includes two sets of fixed pulleys, and the lower pulley frame 102 includes two sets of movable pulleys, with multiple pulleys in each set. The fixed pulleys and movable pulleys on the upper pulley frame 101 and the lower pulley frame 102 are respectively installed on the corresponding lower and upper STS structures via pulley frame structures. The winding path of the wire rope 105 is led out from the zigzag drum 103, and sequentially passes around one fixed pulley of the upper pulley frame 101, one movable pulley of the lower pulley frame 102, another fixed pulley of the upper pulley frame 101, and another movable pulley of the lower pulley frame 102, finally fixing the rope end. In this embodiment, each set of fixed pulleys of the upper pulley frame 101 and each set of movable pulleys of the lower pulley frame 102 are provided with multiple parallel rope grooves, which is equivalent to allowing the wire rope 105 to be wound multiple times on a single pulley, thereby expanding the effective winding path in a limited space, ensuring the tight arrangement of the wire rope 105, and improving the system's load-bearing capacity.

[0031] Reference Figure 4A support 5 is installed below the zigzag drum 103. The support 5 is fixedly installed at the bottom of the lower structure of the STS. A bearing seat 3 and a front support seat 4 of the drum are installed on the support 5. The two ends of the zigzag drum 103 are respectively rotatably installed on the bearing seat 3 and the front support seat 4 of the drum. The bearing seat 3 and the front support seat 4 of the drum support the zigzag drum 103, which improves the stability of the drum operation. The support 5 structure improves the structural reliability and provides an installation base for the bearing seat 3 and the front support seat 4 of the drum, which is convenient for disassembly and assembly.

[0032] Reference Figure 4 The motor 104 is mounted on the support 5, and a transmission mechanism 2 is installed between the motor 104 and the zigzag drum 103. In this embodiment, the motor 104 drives the zigzag drum 103 to rotate through the transmission mechanism 2. The transmission mechanism 2 includes a right-angle reducer 201 and a built-in planetary reducer 202. The input end of the right-angle reducer 201 is connected to the output shaft of the motor 104, and the output end of the right-angle reducer 201 is connected to the input end of the built-in planetary reducer 202. The output end of the built-in planetary reducer 202 is connected to the input end of the zigzag drum 103. The right-angle reducer 201 effectively shortens the power transmission path. At the same time, through the optimized design of the gear meshing angle, the high-speed low-torque output of the motor 104 is converted into a suitable medium-speed medium-torque power flow, reducing the impact load of the subsequent transmission links. The built-in planetary reducer 202 achieves a high reduction ratio and a large torque carrying capacity in a limited space, eliminating the risk of single-tooth overload.

[0033] Reference Figure 4 A brake drum 6 is installed at the input end of the zigzag drum 103, and a drum brake 7 is installed on the support 5. The brake drum 6 and the drum brake 7 correspond to and cooperate with each other. The drum brake 7 grips the brake drum 6 to prevent the zigzag drum 103 from rotating, thereby improving the braking safety of the self-lifting device of the ultra-large crane. Through the high-strength friction surface design of the brake drum 6, the rotational kinetic energy of the drum is effectively converted into heat energy and dissipated quickly, ensuring the stable output of braking force during heavy-load lifting.

[0034] Reference Figure 4 and Figure 5 A ratchet 8 is fixedly mounted on the shaft of the zigzag drum 103. The ratchet 8 is located on the side of the zigzag drum 103 away from the brake drum 6. A pawl 9 is mounted on the support 5. The ratchet 8 and the pawl 9 cooperate to form a one-way transmission mechanism 2, which only allows the zigzag drum 103 to rotate in the winding direction and prevents the zigzag drum 103 from rotating in the opposite direction. In this embodiment, the pawl 9 is hinged to the support 5, and the pawl 9 can be rotated to separate the ratchet 8 and the pawl 9. The ratchet 8 and the pawl 9 provide mechanical anti-reverse protection for the self-lifting device of the ultra-large crane. Its multi-tooth one-way meshing structure can effectively lock the rotation direction of the drum, prevent the risk of load falling due to reverse rotation of the drum under heavy load, and improve the safety protection capability.

[0035] The implementation principle of the self-lifting device for a quayside container crane in this application embodiment is as follows: When encountering height restrictions, a split transportation design is adopted. The upper and lower structures are folded and lowered for separate transportation. After arriving at the dock, the self-lifting device is used to complete the assembly. After the lower structure is in place and the wire rope 105 and pulley block are arranged, the control system integrates and coordinates the four lifting mechanisms 1 to realize the lifting function of the upper structure of the STS. The motor 104 is started, and the lifting is achieved through the right-angle reduction box 201 and the built-in planetary reducer. 202 Reduce the rotation speed while increasing the torque to drive the zigzag drum 103 to slowly wind up the rope. The wire rope 105 passes through the pulleys of the upper pulley frame 101 and the lower pulley frame 102 of the moving pulley group in sequence, and the upper structure is lifted smoothly until the upper structure is lifted to a suitable height. The motor 104 is de-energized, and the drum brake 7 immediately engages the brake drum 6 to prevent the zigzag drum 103 from rotating. The ratchet 8 and pawl 9 automatically lock to completely prevent rope slippage accidents. After the upper structure is lifted to the installation height, it is assembled to restore the overall shape of the STS machine.

[0036] By setting up lifting mechanism 1, the transportation and assembly efficiency of ultra-large port machinery is improved. Four sets of lifting mechanisms 1 are used in conjunction with the stepless speed regulation system of the zigzag drum 103 to achieve linear and stable lifting of the wire rope 105. It can adapt to various lifting heights, has a strong lifting capacity, and can be used for lifting the maximum weight of the STS superstructure, which reaches about 1400T. At the same time, it has a high degree of modularity, small structural volume, and convenient transfer, and can meet the requirements of standard container transportation.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-lifting device for a quayside container crane, characterized in that: The system includes four symmetrically arranged lifting mechanisms. Each lifting mechanism includes an upper pulley frame located at the top of the lower structure of the STS, a lower pulley frame located at the top of the upper structure of the STS, a zigzag drum, a motor, and a wire rope. The zigzag drum is rotatably mounted at the bottom of the lower structure of the STS. A transmission mechanism is provided between the motor and the zigzag drum. One end of the wire rope is wound around the zigzag drum, and the other end of the wire rope passes through the upper pulley frame and the lower pulley frame in sequence and is then fixedly connected.

2. The self-lifting device for a quayside container crane according to claim 1, characterized in that: The two ends of the zigzag drum are respectively provided with bearing seats and front support seats for support, and the zigzag drum is rotatably connected to the bearing seats and front support seats.

3. The self-lifting device for a quayside container crane according to claim 2, characterized in that: The bearing housing and the drum front support are both provided with a support at their bottoms, and the support is connected to the bottom of the STS lower structure.

4. The self-lifting device for a quayside container crane according to claim 3, characterized in that: The input end of the zigzag drum is equipped with a brake drum, and the support is equipped with a drum brake for cooperating with the brake drum.

5. The self-lifting device for a quayside container crane according to claim 4, characterized in that: A ratchet is provided on the shaft of the zigzag drum, and the ratchet is arranged on the side of the zigzag drum away from the brake drum. A pawl for cooperating with the ratchet is provided on the support.

6. The self-lifting device for a quayside container crane according to claim 5, characterized in that: The ratchet and pawl work together to form a one-way transmission mechanism, which only allows the zigzag drum to rotate in the winding direction and prevents the zigzag drum from rotating in the opposite direction.

7. The self-lifting device for a quayside container crane according to claim 1, characterized in that: The transmission mechanism includes a right-angle reducer and a built-in planetary reducer. The input end of the right-angle reducer is connected to the output shaft of the motor, and the output end of the right-angle reducer is connected to the input end of the built-in planetary reducer. The output end of the built-in planetary reducer is connected to the input end of the zigzag drum.

8. The self-lifting device for a quayside container crane according to claim 1, characterized in that: The upper pulley frame includes two sets of fixed pulleys, and the lower pulley frame includes two sets of movable pulleys. The winding path of the wire rope is led out from the zigzag drum, and sequentially passes around one fixed pulley of the upper pulley frame, one movable pulley of the lower pulley frame, another fixed pulley of the upper pulley frame, and another movable pulley of the lower pulley frame, finally fixing the rope end.

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