Quayside container crane superstructure and cableless self-powered device for spreader and method of use

Abstract

The application provides a shore-based container crane upper frame and cable-free self-powered device of a lifting tool and a use method, and belongs to the technical field of cranes. The device comprises an upper frame pulley of a crane and a pulley guard plate arranged on one side of the upper frame pulley. A drive sprocket is arranged on the side of the upper frame pulley, a sprocket mechanism is arranged on the top of the pulley guard plate, the input end of the sprocket mechanism is connected with the drive sprocket, and the output end of the sprocket mechanism is connected with a power generation device. The power generation device is sequentially electrically connected with a rectifier module, a voltage stabilizing module and an energy storage unit, and the energy storage unit is electrically connected with an inverter module. The application realizes cable-free self-power supply by recycling the rotating mechanical energy of the upper frame pulley, replaces the traditional vertical cable, solves the problems of easy wear, frequent failure and high energy consumption of the vertical cable, adopts chain transmission passive speed increase, has high conversion efficiency of mechanical energy-electric energy, has sufficient power supply of double power generation units, is compatible with AC and DC loads, improves operation reliability and efficiency, and reduces operation cost.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and in particular to a cableless self-powered device for the lifting frame and spreader of a quay container crane and its usage method. Background Technology

[0002] Currently, as the core loading and unloading equipment of container terminals, the energy conservation, consumption reduction, and reliable operation of quay cranes have become key areas for technological upgrading in the industry. Traditional quay crane mounting and spreader systems have long relied on trolley frame cable reels with vertical suspension cables for power supply. The vertical cables are prone to wear and frequent failures, which not only increases the energy consumption of equipment operation and terminal operating costs, but also restricts the efficiency of automated operations.

[0003] Existing potential energy recovery and power generation technologies are difficult to adapt to the needs of quay crane operations. For example, Chinese patent application CN115140250A discloses a crane that uses stored-electricity for loading ships. It is designed for bulk material loading scenarios and uses the gravity difference of bulk materials in the double-hanger system to drive the sprocket to generate electricity by reversing direction. It only recovers the gravitational potential energy of the bulk materials. Its structure and working conditions cannot be adapted to the "lifting-spreader" system of container quay cranes. Another example is Chinese patent application CN117856529A, which discloses a ratchet lever-driven generator drive device. It uses a permanent magnet motor to drive the lever and ratchet pawl to generate electricity. It is a general independent power generation device that does not take into account the characteristics of crane operations. It cannot collect the mechanical energy of the rotation of the quay crane pulleys, and it cannot solve the problem of cableless power supply for "lifting-spreader".

[0004] In summary, existing technologies cannot achieve efficient recovery of mechanical energy and cableless self-powered operation of the "lifting-spreader" system of quay container cranes. The industry urgently needs to develop self-powered solutions adapted to the working conditions of quay cranes to replace the traditional vertical cable power supply mode. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies in achieving efficient recovery of mechanical energy and cableless self-powered power supply, and to provide a cableless self-powered power supply device and method for use for the hoisting and spreading of a quay container crane.

[0006] In a first aspect, the present invention provides a cableless self-powered device for the upper frame and spreader of a quay container crane to solve the above-mentioned technical problems. The device includes an upper frame pulley of the crane and a pulley guard plate disposed on one side of the upper frame pulley. A drive sprocket is disposed on the side of the upper frame pulley, located between the upper frame pulley and the pulley guard plate, and the drive sprocket can rotate synchronously with the upper frame pulley. A sprocket mechanism is disposed on the top of the pulley guard plate, the input end of which is connected to the drive sprocket. The drive sprocket and the sprocket mechanism can form a mechanical energy harvesting structure for the upper frame pulley. A power generation device is connected to the output end of the sprocket mechanism, and the power generation device is disposed on the side of the pulley guard plate opposite to the drive sprocket. The power generation device is electrically connected in series to a rectifier module, a voltage regulator module, and an energy storage unit. The energy storage unit is electrically connected to an inverter module, and the inverter module is electrically connected to the power supply devices of the upper frame and spreader.

[0007] This device directly collects the inherent rotational mechanical energy of the pulleys in quay crane operations, unlike existing technologies that rely on the gravitational potential energy of bulk materials and universal independent power generation. It is precisely adapted to the "uplift-spreading" working conditions of quay cranes; it completely eliminates the reliance on traditional vertical cable power supply, solves the problems of easy wear, high energy consumption, and frequent failures of vertical cables, achieves cableless self-powered operation, and reduces terminal operating costs.

[0008] A further improvement of the present invention is that the sprocket mechanism includes an input sprocket, a drive shaft, and an output sprocket. The drive shaft is rotatably mounted on the top of the pulley guard plate, and the input sprocket and the output sprocket are respectively fixed to both ends of the drive shaft. The input sprocket is connected to the drive sprocket via an input chain, and the output sprocket is connected to the power generation device via an output chain.

[0009] This device adopts a pure mechanical chain drive structure, without the complex reversing gear set and ratchet lever mechanism of existing technologies. It has a simple structure, stable transmission, is suitable for high-frequency loading and unloading operations of quay cranes, and has low mechanical energy transmission loss.

[0010] A further improvement of the present invention is that the pitch circle diameter of the input sprocket is smaller than that of the output sprocket, and the pitch circle diameter of the output sprocket is smaller than that of the drive sprocket.

[0011] This device achieves passive speed increase through mechanical matching, eliminating the need for an additional speed-increasing motor, significantly improving the conversion efficiency of "mechanical energy to electrical energy" and solving the industry pain point that low-speed pulleys are difficult to drive for efficient power generation.

[0012] A further improvement of the present invention is that the top of the pulley guard plate is provided with a mounting groove, and the transmission shaft is rotatably supported inside the mounting groove by a bearing assembly.

[0013] This device makes full use of the existing installation space on the quay crane without altering the original main structure of the crane. It is convenient for "new installation / modification", has a compact structure, and does not affect the normal operation of the pulleys.

[0014] A further improvement of the present invention is that the power generation device includes a support platform and a generator, the support platform is fixed to the side of the pulley guard plate, and the generator is fixed to the top of the support platform; the output end of the generator is connected to a rotating shaft through a coupling, and the rotating shaft is rotatably supported on the top of the support platform through a bearing assembly; a transmission sprocket is fixed on the rotating shaft, and the transmission sprocket is connected to the output sprocket through an output chain.

[0015] The power generation unit of this device is integrated and installed on the side of the pulley guard plate. It is firmly installed, occupies little space, and the chain drive responds quickly, generating power instantly as the pulley rotates without delay.

[0016] A further improvement of the present invention is that the pitch circle diameter of the transmission sprocket is smaller than that of the output sprocket.

[0017] This device, through the aforementioned secondary speed-increasing design, ensures that the generator is always in the optimal power generation speed range, further increasing power generation and meeting the power needs of multiple devices in the "scaffolding-spreading" system.

[0018] A further improvement of the present invention is that there are two power generation devices and two output sprockets. The two power generation devices are respectively disposed on the side of the pulley guard plate on both sides of the drive shaft, and the two output sprockets are arranged and fixed to the end of the drive shaft in sequence. The two output sprockets are respectively connected to the drive sprocket of the corresponding power generation device through the output chain.

[0019] This device generates electricity through two generators connected in parallel on both sides, providing ample power output and strong power supply stability. It avoids the inadequacy of a single generator and is suitable for the high-power operation of quay cranes. Compared with existing single generator devices, it has higher reliability.

[0020] A further improvement of the present invention is that the inverter module includes a DC-DC module and a DC-AC module, and the energy storage unit is electrically connected to the DC-DC module and the DC-AC module respectively.

[0021] This device, through the above design, can be adapted to multiple types of electrical equipment such as DC hydraulic pumps and AC control modules, with strong power supply compatibility. It does not require additional conversion equipment and simplifies the structure of the cableless power supply system.

[0022] A further improvement of the present invention is that the drive sprocket is sleeved on the pin of the upper frame pulley, and the drive sprocket is fixedly connected to the side of the upper frame pulley by screws.

[0023] This device maximizes mechanical energy harvesting efficiency through coaxial and synchronous transmission between the drive sprocket and pulley, without interfering with the normal lifting operation of the upper pulley. It is securely installed and has precise transmission.

[0024] Secondly, the present invention also provides a method for using a cableless self-powered device for the hoisting and spreading gear of a quay container crane, comprising the following steps: S1. When the quay container crane performs loading and unloading operations, the wire rope pulls the spreader to rise and fall, and the trolley moves horizontally, which drives the upper pulley to rotate continuously around the pin shaft. The drive sprocket, which is fixedly connected to the upper pulley, rotates synchronously, and the mechanical energy generated by the rotation of the upper pulley is transmitted to the sprocket mechanism. S2. The sprocket mechanism increases the rotational speed through the chain drive of the input sprocket, drive shaft and output sprocket, and transmits the increased mechanical energy to the drive sprocket of the power generation device through the output chain; S3. The transmission sprocket drives the generator to rotate at high speed, converting mechanical energy into alternating current. The alternating current is rectified by the rectifier module and regulated by the voltage regulator module, and then converted into stable direct current to charge the energy storage unit. S4. The stored electrical energy output by the energy storage unit is converted into DC power suitable for DC loads by the DC-DC module of the inverter module and into AC power suitable for AC loads by the DC-AC module, which then supplies power to the hydraulic pumps, control modules and other electrical devices of the upper frame and lifting gear. S5. When the crane is operating continuously, the upper pulley rotates in a cycle, and the device synchronously repeats the mechanical energy harvesting, speed-up transmission, power generation, rectification and voltage stabilization, energy storage and inverter power supply process to continuously supply power to the upper frame and lifting equipment, realizing cableless self-powered power supply.

[0025] This device, through the above-described usage method, can achieve closed-loop self-powered operation by relying entirely on the mechanical energy of the quay crane itself, completely replacing the traditional vertical cable and solving the problems of vertical cable wear, high energy consumption, and frequent failures. Compared with existing potential energy recovery technologies, it has stronger adaptability and more stable operation, helping green ports save energy and reduce consumption, and aligning with the "dual carbon" goal.

[0026] As can be seen from the above technical solutions, the beneficial effects of the present invention are: 1. This invention achieves cable-free self-powered operation by recovering the rotational mechanical energy of the pulleys on the quayside container crane, completely eliminating the dependence on traditional vertical cable power supply. It fundamentally solves the industry pain points of easy wear and tear, frequent failures, and high additional energy consumption of vertical cables, effectively reducing terminal operating costs and precisely meeting the requirements of green port construction and "dual carbon" energy conservation and emission reduction.

[0027] 2. This invention adopts a chain drive speed increase and integrated structural design, making full use of the existing installation space on the rack without modifying the main structure of the crane, making new installation and modification convenient; by using a multi-stage sprocket pitch circle ratio to achieve passive speed increase, low-speed mechanical energy can be efficiently converted into high-speed kinetic energy, greatly improving the "mechanical energy-electric energy" conversion efficiency, and the transmission is stable and suitable for the high-frequency operation conditions of quay cranes.

[0028] 3. This invention is equipped with dual power generation units and AC / DC compatible inverter modules, providing ample power supply and stable output. It can simultaneously adapt to various electrical equipment such as hydraulic pumps and control modules. The cableless layout simplifies the system structure, reduces equipment maintenance workload, and significantly improves the operational reliability and loading / unloading efficiency of the overhead lifting system. Attached Figure Description

[0029] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the sprocket mechanism and power generation device according to a specific embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the output sprocket and the transmission sprocket in a specific embodiment of the present invention.

[0033] Figure 4 This is a circuit schematic diagram of a specific embodiment of the present invention.

[0034] In the diagram: 1. Upper pulley; 101. Pin; 2. Pulley guard plate; 201. Mounting groove; 3. Drive sprocket; 4. Sprocket mechanism; 5. Input sprocket; 6. Drive shaft; 601. Rotating shaft; 7. Output sprocket; 8. Input chain; 801. Output chain; 9. Generator; 10. Support platform; 11. Generator; 12. Drive sprocket; 13. Rectifier module; 14. Voltage regulator module; 15. Energy storage unit; 16. DC-DC module; 1601. DC-AC module. Detailed Implementation

[0035] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] Example 1: Refer to Figure 1-4This embodiment provides a cableless self-powered device for the upper frame and spreader of a quayside container crane, including an upper frame pulley 1 and a pulley guard plate 2 disposed on one side of the upper frame pulley 1; a drive sprocket 3 is disposed on the side of the upper frame pulley 1, the drive sprocket 3 is located between the upper frame pulley 1 and the pulley guard plate 2, and the drive sprocket 3 can rotate synchronously with the upper frame pulley 1; a sprocket mechanism 4 is disposed on the top of the pulley guard plate 2, the input end of the sprocket mechanism 4 is connected to the drive sprocket 3, and the drive sprocket 3 and the sprocket mechanism 4 can form a mechanical energy harvesting structure for the upper frame pulley 1; a power generation device 9 is connected to the output end of the sprocket mechanism 4, and the power generation device 9 is disposed on the side of the pulley guard plate 2 away from the drive sprocket 3; the power generation device 9 is electrically connected in series to a rectifier module 13, a voltage regulator module 14, and an energy storage unit 15; the energy storage unit 15 is electrically connected to an inverter module, and the inverter module is electrically connected to the power supply device of the upper frame and spreader.

[0037] When the quay container crane is operating, the upper pulley 1 rotates continuously under the traction of the wire rope, which drives the drive sprocket 3 on the side to rotate synchronously. The drive sprocket 3 and the sprocket mechanism 4 cooperate to collect the rotational mechanical energy of the upper pulley 1. The sprocket mechanism 4 transfers the mechanical energy to the power generation device 9 and converts it into electrical energy. The electrical energy is rectified by the rectifier module 13 and regulated by the voltage regulator module 14 before being stably stored in the energy storage unit 15. The energy storage unit 15 outputs the electrical energy through the inverter module to continuously supply power to the electrical devices of the upper frame and the spreader.

[0038] This invention directly collects the inherent rotational mechanical energy of the pulleys in quay crane operations, which is different from the gravitational potential energy of bulk materials and universal independent power generation in existing technologies. It is precisely adapted to the "uplift-spreading" working conditions of quay cranes; it completely eliminates the dependence on traditional vertical cable power supply, solves the problems of easy wear, high energy consumption and frequent failures of vertical cables, realizes cableless self-powered power supply, and reduces terminal operating costs.

[0039] Specifically, refer to Figure 1 , 2 In addition to 3, the sprocket mechanism 4 includes an input sprocket 5, a drive shaft 6, and an output sprocket 7. The drive shaft 6 is rotatably mounted on the top of the pulley guard plate 2. The input sprocket 5 and the output sprocket 7 are respectively fixed to both ends of the drive shaft 6. The input sprocket 5 is connected to the drive sprocket 3 through an input chain 8, and the output sprocket 7 is connected to the power generation device 9 through an output chain 801.

[0040] The drive sprocket 3 drives the input sprocket 5 to rotate via the input chain 8. The power is transmitted to the output sprocket 7 via the drive shaft 6. The output sprocket 7 then transmits the power to the generator 9 via the output chain 801, thus completing the stable transmission of the mechanical energy of the pulley.

[0041] This invention adopts a pure mechanical chain transmission structure, without the complex reversing gear set and ratchet lever mechanism of the prior art. It has a simple structure, stable transmission, is suitable for high-frequency loading and unloading operations of quay cranes, and has low mechanical energy transmission loss.

[0042] Specifically, refer to Figure 1 The pitch circle diameter of the input sprocket 5 is smaller than that of the output sprocket 7, and the pitch circle diameter of the output sprocket 7 is smaller than that of the drive sprocket 3.

[0043] Based on the size ratio of input sprocket 5 pitch circle diameter < output sprocket 7 < drive sprocket 3, the speed is gradually increased during the chain drive process, converting the low speed of the upper pulley 1 into a high speed suitable for power generation.

[0044] This invention achieves passive speed increase through mechanical proportioning, eliminating the need for an additional speed-increasing motor, significantly improving the conversion efficiency of "mechanical energy to electrical energy", and solving the industry pain point that low-speed pulleys are difficult to drive for efficient power generation.

[0045] Specifically, refer to Figure 3 The top of the pulley guard plate 2 is provided with an installation groove 201, and the drive shaft 6 is rotatably supported inside the installation groove 201 by a bearing assembly.

[0046] The drive shaft 6 is rotatably supported in the mounting groove 201 of the pulley guard plate 2 by the bearing assembly, and the drive shaft 6 is fixed and rotated by relying on the original structure of the pulley guard plate 2.

[0047] This invention makes full use of the existing installation space on the quay crane without altering the original main structure of the crane. It is convenient for "new installation / modification", has a compact structure, and does not affect the normal operation of the pulleys.

[0048] Specifically, refer to Figure 2 and 3 The power generation device 9 includes a support platform 10 and a generator 11. The support platform 10 is fixed to the side of the pulley guard plate 2, and the generator 11 is fixed to the top of the support platform 10. The output end of the generator 11 is connected to a rotating shaft 601 through a coupling. The rotating shaft 601 is rotatably supported on the top of the support platform 10 through a bearing assembly. A transmission sprocket 12 is fixed on the rotating shaft 601, and the transmission sprocket 12 is connected to the output sprocket 7 through an output chain 801.

[0049] The output sprocket 7 drives the transmission sprocket 12 to rotate via the output chain 801. The transmission sprocket 12 drives the generator 11 to run at high speed and generate electricity via the shaft 601 and coupling. The support platform 10 provides a stable mounting carrier for the generator 11.

[0050] The power generation device 9 of the present invention is integrated and installed on the side of the pulley guard plate 2. It is firmly installed, occupies little space, and has a rapid chain drive response. It can generate electricity instantly as the pulley rotates and supply energy without delay.

[0051] Specifically, refer to Figure 3 The pitch circle diameter of the transmission sprocket 12 is smaller than that of the output sprocket 7.

[0052] The pitch circle diameter of the transmission sprocket 12 is smaller than that of the output sprocket 7. Driven by the output sprocket 7, the input speed of the generator 11 is further increased, thus completing the secondary speed increase.

[0053] The present invention, through the above-mentioned secondary speed increase design, can ensure that the generator 11 is always in the optimal power generation speed range, further increasing the power generation and meeting the power needs of multiple devices in the "mounting-spreading" system.

[0054] Specifically, refer to Figure 2 The generator 9 and the output sprocket 7 are provided in twos. The two generator 9 are respectively provided on the side of the pulley guard plate 2 on both sides of the drive shaft 6. The two output sprockets 7 are arranged and fixed to the end of the drive shaft 6 in sequence, and the two output sprockets 7 are respectively connected to the drive sprocket 12 of the corresponding generator 9 through the output chain 801.

[0055] A sprocket 7 is fixed at each end of the drive shaft 6. The two sprockets 7 drive the corresponding generators 9 to operate synchronously and generate electricity through the output chains 801.

[0056] This invention generates electricity by connecting two generators on both sides in parallel, resulting in sufficient power output and strong power supply stability. It avoids the inadequacy of power supply from a single generator, is suitable for the high-power operation of quay cranes, and has higher reliability compared to existing single generator devices.

[0057] Specifically, refer to Figure 4 The inverter module includes a DC-DC module 16 and a DC-AC module 1601, and the energy storage unit 15 is electrically connected to the DC-DC module 16 and the DC-AC module 1601 respectively.

[0058] The DC power output from the energy storage unit 15 is converted into electrical energy suitable for DC loads by the DC-DC module 16, and then converted into electrical energy suitable for AC loads by the DC-AC module 1601, so as to supply power to different electrical devices.

[0059] The present invention, through the above design, can be adapted to multiple types of electrical equipment such as DC hydraulic pumps and AC control modules, with strong power supply compatibility, no need to add additional conversion equipment, and simplifies the structure of the cableless power supply system.

[0060] Specifically, refer to Figure 1 The drive sprocket 3 is sleeved on the pin 101 of the upper frame pulley 1, and the drive sprocket 3 is fixedly connected to the side of the upper frame pulley 1 by screws.

[0061] The drive sprocket 3 is mounted on the pin 101 of the upper frame pulley 1 and is fixed to the side of the upper frame pulley 1 with screws to ensure that the drive sprocket 3 rotates synchronously without relative slippage when the pulley 1 rotates.

[0062] This invention maximizes the efficiency of mechanical energy harvesting by driving the sprocket 3 and pulley 1 to be coaxial and synchronously transmitted, without interfering with the normal lifting operation of the upper pulley 1, and is securely installed and has precise transmission.

[0063] Example 2: Based on Example 1, this example provides a method for using a cableless self-powered device for the hoisting and spreading gear of a quay container crane, including the following steps: S1. When the quay container crane performs loading and unloading operations, the wire rope pulls the spreader to lift and lower, and the trolley moves horizontally, which drives the upper pulley 1 to rotate continuously around the pin 101. The drive sprocket 3, which is fixedly connected to the upper pulley 1, rotates synchronously, and transmits the mechanical energy generated by the rotation of the upper pulley 1 to the sprocket mechanism 4. S2. The sprocket mechanism 4 completes the speed increase through the chain drive cooperation of the input sprocket 5, the drive shaft 6 and the output sprocket 7, and transmits the increased mechanical energy to the drive sprocket 12 of the power generation device 9 through the output chain 801; S3. The transmission sprocket 12 drives the generator 11 to rotate at high speed, converting mechanical energy into alternating current. The alternating current is rectified by the rectifier module 13 and regulated by the voltage regulator module 14, and then converted into stable direct current to charge and store energy for the energy storage unit 15. S4. The stored electrical energy output by the energy storage unit 15 is converted into DC power adapted to DC load by the DC-DC module 16 of the inverter module and into AC power adapted to AC load by the DC-AC module 1601, respectively supplying power to the hydraulic pump, control module and other electrical devices of the upper frame and the lifting gear. S5. When the crane is operating continuously, the upper pulley 1 rotates in a cycle, and the device synchronously repeats the mechanical energy harvesting, speed-up transmission, power generation, rectification and voltage stabilization, energy storage and inverter power supply process to continuously supply power to the upper frame and lifting equipment, realizing cableless self-powered power supply.

[0064] Step S1: Collect the rotational mechanical energy of the upper pulley 1; Step S2: Increase the rotational speed through the sprocket mechanism 4; Step S3: Drive the generator 11 to generate electricity through the transmission sprocket 12, and store the electrical energy in the energy storage unit 15 after rectification and voltage stabilization; Step S4: Convert the electrical energy into AC / DC power adapted to the load to power the electrical device; Step S5: When the crane is working continuously, the device cyclically executes the above process to achieve uninterrupted cableless power supply.

[0065] This invention, through the above-described method, can achieve closed-loop self-powered operation by relying entirely on the mechanical energy of the quay crane itself, completely replacing the traditional vertical cable and solving the problems of vertical cable wear, high energy consumption, and frequent failures. Compared with existing potential energy recovery technologies, it has stronger adaptability and more stable operation, helping green ports save energy and reduce consumption, and aligning with the "dual carbon" goal.

[0066] Furthermore, this invention can also be used to power a crane's wireless communication system. This invention is equipped with a dual-link redundant wireless communication system, consisting of a fixed-end control unit and a mobile-end control unit. The fixed-end control unit includes a quay crane main controller located in the electrical room, and a main station wireless base station and a redundant main station wireless base station installed on the trolley frame via industrial optical cables. The quay crane main controller interacts bidirectionally with the two sets of wireless base stations. The mobile-end control unit is located on the overhead crane or lifting device, including a slave station wireless terminal, a redundant slave station wireless terminal, and a lifting device controller. The main station wireless base station and the slave station wireless terminal establish a communication link via a wireless bridge, replacing the traditional communication cable within the vertical cable.

[0067] During operation, commands from the quay crane's main controller are transmitted wirelessly to the spreader controller to drive the actuators, while monitoring data is fed back to the main controller. In the event of a main communication link failure, the system automatically and seamlessly switches to a redundant communication link to ensure uninterrupted signal transmission. This device powers the wireless communication system through its own power supply, and combined with a redundant wireless communication architecture, completely eliminates physical vertical cables, improving equipment reliability and operational efficiency.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cableless self-powered device for the upper frame and spreader of a quay container crane, comprising an upper frame pulley (1) of the crane and a pulley guard plate (2) disposed on one side of the upper frame pulley (1), characterized in that, A drive sprocket (3) is provided on the side of the upper pulley (1). The drive sprocket (3) is located between the upper pulley (1) and the pulley guard plate (2), and the drive sprocket (3) can rotate synchronously with the upper pulley (1). A sprocket mechanism (4) is provided on the top of the pulley guard plate (2). The input end of the sprocket mechanism (4) is connected to the drive sprocket (3). The drive sprocket (3) and the sprocket mechanism (4) can form a mechanical energy harvesting structure for the upper pulley (1). A power generation device (9) is connected to the output end of the sprocket mechanism (4). The power generation device (9) is located on the side of the pulley guard plate (2) away from the drive sprocket (3). The power generation device (9) is connected in series with a rectifier module (13), a voltage regulator module (14), and an energy storage unit (15). The energy storage unit (15) is connected with an inverter module. The inverter module is connected with the power supply devices of the upper frame and the lifting device.

2. The cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 1, characterized in that, The sprocket mechanism (4) includes an input sprocket (5), a drive shaft (6), and an output sprocket (7). The drive shaft (6) is rotatably mounted on the top of the pulley guard plate (2). The input sprocket (5) and the output sprocket (7) are respectively fixed at both ends of the drive shaft (6). The input sprocket (5) is connected to the drive sprocket (3) through an input chain (8), and the output sprocket (7) is connected to the power generation device (9) through an output chain (801).

3. The cableless self-powered device for the hoisting frame and spreader of a quay container crane according to claim 2, characterized in that, The pitch circle diameter of the input sprocket (5) is smaller than that of the output sprocket (7), and the pitch circle diameter of the output sprocket (7) is smaller than that of the drive sprocket (3).

4. The cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 2, characterized in that, The top of the pulley guard plate (2) is provided with an installation groove (201), and the drive shaft (6) is rotatably supported inside the installation groove (201) by a bearing assembly.

5. A cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 2, characterized in that, The power generation device (9) includes a support platform (10) and a generator (11). The support platform (10) is fixed to the side of the pulley guard plate (2), and the generator (11) is fixed to the top of the support platform (10). The output end of the generator (11) is connected to a rotating shaft (601) through a coupling. The rotating shaft (601) is rotatably supported on the top of the support platform (10) through a bearing assembly. A transmission sprocket (12) is fixed on the rotating shaft (601), and the transmission sprocket (12) is connected to the output sprocket (7) through an output chain (801).

6. A cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 5, characterized in that, The pitch circle diameter of the transmission sprocket (12) is smaller than that of the output sprocket (7).

7. A cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 6, characterized in that, Two generators (9) and two output sprockets (7) are provided. The two generators (9) are respectively located on the side of the pulley guard plate (2) on both sides of the drive shaft (6). The two output sprockets (7) are arranged and fixed at the end of the drive shaft (6) in sequence. The two output sprockets (7) are respectively connected to the drive sprocket (12) of the corresponding generator (9) through the output chain (801).

8. A cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 1, characterized in that, The inverter module includes a DC-DC module (16) and a DC-AC module (1601), and the energy storage unit (15) is electrically connected to the DC-DC module (16) and the DC-AC module (1601) respectively.

9. A cableless self-powered device for the overhead crane and spreader of a quay container crane according to claim 1, characterized in that, The drive sprocket (3) is sleeved on the pin (101) of the upper frame pulley (1), and the drive sprocket (3) is fixedly connected to the side of the upper frame pulley (1) by screws.

10. The method of using the cableless self-powered device for the hoisting and spreading gear of a quay container crane according to any one of claims 1-9, characterized in that, Includes the following steps: S1. When the quay container crane performs loading and unloading operations, the wire rope pulls the lifting device up and down and the trolley moves horizontally, which drives the upper pulley (1) to rotate continuously. The drive sprocket (3) which is fixedly connected to the upper pulley (1) rotates synchronously, and transmits the mechanical energy generated by the rotation of the pulley to the sprocket mechanism (4). S2. The sprocket mechanism (4) increases the rotational speed through the chain drive of the input sprocket (5), the drive shaft (6) and the output sprocket (7), and transmits the increased mechanical energy to the drive sprocket (12) of the power generation device (9). S3. The transmission sprocket (12) drives the generator (11) to run at high speed, converting mechanical energy into alternating current. After rectification and voltage stabilization, the alternating current is converted into stable direct current to charge and store energy for the energy storage unit (15). S4. The energy storage unit (15) outputs electrical energy, which is converted into DC power by the DC-DC module (16) of the inverter module and into AC power by the DC-AC module (1601), respectively supplying power to the hydraulic pumps, control modules and other electrical devices of the upper frame and the lifting gear; S5. When the crane is in continuous operation, the upper pulley (1) rotates in a cycle. The device synchronously repeats the mechanical energy collection, speed increase, power generation, rectification and voltage stabilization, energy storage and inverter power supply process to continuously supply power to the upper frame and the lifting device, realizing cableless self-power supply.

Images