A remotely controlled crown block system

Abstract

The utility model relates to mobile crown block technical field, concretely points to a remote control's crown block system. The crown block system includes two opposite interval crown block tracks, the crown block that travels on the crown block track, main control unit, main control bridge, crown block positioning scale subassembly, sets up the PLC controller of crown block, vehicle-mounted bridge, frequency converter subassembly and switch, and the crown block positioning scale subassembly includes scale sensing scale, scale generator, the yardstick pointer for the electromagnetic induction connection scale sensing scale, scale analyzer, the scale sensing scale sets up on the crown block track, the yardstick pointer sets up on the corresponding response scale sensing scale of crown block. The main control unit is connected through main control bridge communication vehicle-mounted bridge of crown block, can be remote control crown block's PLC controller to regulate and control frequency converter subassembly realizes corresponding action, through yardstick pointer electromagnetic induction to scale sensing scale's coding information carries out the analysis after accurate positioning, realizes remote control crown block operation through main control unit.

Description

Technical Field

[0001] This utility model relates to the field of mobile crane technology, specifically to a remotely controlled crane system. Background Technology

[0002] Overhead cranes are commonly used equipment for aerial operations. They are mounted on fixed tracks in the air and moved to the target work area to perform tasks, such as loading, unloading, transporting, and leveling materials above a coal yard. Traditional grab crane operations often involve manual operation on the crane itself. This involves a dusty working environment, resulting in high labor intensity for crane operators, exposure to dust, noise, and extreme temperatures, which is detrimental to worker health. Existing remotely controlled overhead cranes use cameras to observe the work site and control the crane's movement on the tracks based on the camera's view. However, this method cannot accurately pinpoint the crane's location on the tracks. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology and provide a remotely controlled overhead crane system.

[0004] The technical solution adopted by this utility model is: a remotely controlled overhead crane system, which includes two fixed overhead crane tracks and an overhead crane adapted to travel on the two overhead crane tracks. The system is characterized by further including a main controller, a main control bridge, an overhead crane positioning scale assembly, and a PLC controller, an on-board bridge, a frequency converter assembly, and a switch installed on the overhead crane. The crane travel control command information output terminal of the main controller is connected to the signal input terminal of the main control bridge. The crane travel control command information output terminal of the main control bridge is connected to the signal input terminal of the vehicle-mounted bridge via wireless communication. The crane travel control command information output terminal of the vehicle-mounted bridge is connected to the control command input terminal of the PLC controller. The crane travel frequency converter signal output terminal of the PLC controller is connected to the control terminal of the crane travel frequency converter via a switch. The crane positioning scale assembly includes a scale-sensing scale, a scale generator, a vernier pointer mounted on the crane, and a scale analyzer. The scale-sensing scale is installed on the crane track along its length. The scale generator is installed on the corresponding crane track. The scale encoding information output terminal of the scale generator is connected to the scale encoding information input terminal of the scale-sensing scale. The sensing terminal of the vernier pointer is matched with the scale-sensing scale. The sensing signal output terminal of the vernier pointer is connected to the signal input terminal of the scale analyzer. The scale analyzer is used to generate crane positioning information based on the encoding information of the scale-sensing scale sensed by the vernier pointer. The crane positioning information receiving terminal of the PLC controller is connected to the crane positioning signal output terminal of the scale analyzer.

[0005] Furthermore, the overhead crane is equipped with a crane motor connected to the crane travel frequency converter. The crane motor drives the crane rollers, which roll and abut against the crane track.

[0006] Furthermore, the overhead crane is also equipped with grab truck tracks and grab trucks adapted to travel on the grab truck tracks.

[0007] Furthermore, the grab truck has a lifting device and a grab bucket, a lifting frequency converter is installed on the overhead crane, and the lifting end of the lifting device is equipped with a grab bucket; the lifting control command information output terminal of the main controller is connected to the signal input terminal of the main control bridge, the lifting control command information output terminal of the main control bridge is connected to the signal input terminal of the vehicle-mounted bridge through wireless communication, the lifting control command information output terminal of the vehicle-mounted bridge is connected to the lifting control command input terminal of the PLC controller, and the lifting frequency converter signal output terminal of the PLC controller is connected to the control terminal of the lifting frequency converter through a switch.

[0008] Furthermore, the overhead crane is equipped with grab truck tracks and grab trucks adapted to travel on the grab truck tracks, and the grab truck tracks are arranged in opposite directions along the two overhead crane tracks; the frequency converter assembly includes a grab truck travel frequency converter for controlling the movement of the grab trucks along the grab truck tracks; the fixed end of the lifting device is located on the grab truck, and the lifting end is equipped with a grab bucket.

[0009] Furthermore, the output terminal of the grab truck driving control command information of the main controller is connected to the signal input terminal of the main control bridge, the output terminal of the grab truck driving control command information of the main control bridge is connected to the signal input terminal of the vehicle-mounted bridge via wireless communication, the output terminal of the grab truck driving control command information of the vehicle-mounted bridge is connected to the control command input terminal of the PLC controller, and the output terminal of the grab truck driving frequency converter signal of the PLC controller is connected to the grab truck driving frequency converter via a switch.

[0010] Furthermore, the lifting device includes a robotic arm, one end of which is mounted on the grab truck and the other end is connected to a grab bucket, for moving the grab bucket to adjust its position.

[0011] Furthermore, the lifting device includes a lifting motor and a traction drum assembly that are electrically connected to the lifting frequency converter. The traction drum assembly includes a drum that is connected to the output end of the lifting motor and a traction rope that is fixed to the drum at one end and wound around the drum.

[0012] Furthermore, the opening and closing control command information output terminal of the main controller is connected to the signal input terminal of the main control bridge, the opening and closing control command information output terminal of the main control bridge is connected to the signal input terminal of the vehicle-mounted bridge via wireless communication, the opening and closing control command information output terminal of the vehicle-mounted bridge is connected to the control command input terminal of the PLC controller, and the opening and closing frequency converter signal output terminal of the PLC controller is connected to the opening and closing frequency converter via a switch. The opening and closing frequency converter is used to control the opening and closing of the grab bucket.

[0013] Furthermore, the opening and closing drive includes a telescopic electric cylinder, which is electrically connected to the opening and closing frequency converter, and the telescopic end is connected to one side of the grab bucket for telescopic adjustment of the opening degree of the grab bucket.

[0014] Furthermore, the grab truck and the grab truck track are equipped with a grab truck positioning scale assembly for positioning the position of the grab truck as it moves along the grab truck track.

[0015] Furthermore, the grab truck positioning scale assembly includes a scale sensing scale, a scale generator connected to the scale sensing scale, a vernier pointer for sensing the scale sensing scale, and a scale analyzer electrically connected to the vernier pointer.

[0016] Furthermore, the overhead crane is equipped with multiple cameras at intervals.

[0017] The beneficial effects of this utility model include: 1. The crane is suspended in the air via two rails of the track assembly, allowing for stable sliding installation of the crane. The main controller communicates with the on-board bridge on the crane via a main control bridge, which in turn connects to the PLC controller on the crane. This allows for remote control of the PLC controller and its feedback, indirectly controlling the operation of the frequency converter assembly. The PLC controller connects to the crane's frequency converter, and by adjusting the frequency converter, the crane's movement on the rails is controlled, enabling it to be moved to the target work area for operation. Combined with the crane positioning scale assembly, the crane's movement on the rails is precisely located. The main controller can remotely control the crane's precise movement, solving the problems of harsh working environments and the inability to accurately move and position the crane when operating it manually. 2. The lifting device on the overhead crane can raise and lower the mobile grab bucket to realize operations such as loading and unloading. The main controller remotely controls the PLC controller to adjust the lifting frequency converter to realize the raising and lowering of the mobile grab bucket. 3. By using the grab bucket truck track and grab bucket truck, in conjunction with the overhead crane track and overhead crane, the grab bucket truck can increase its range of motion in a two-dimensional plane; the lifting mechanism is located on the grab bucket truck, which can adjust the position of the grab bucket to suit the operation. 4. The lifting device has a simple structure. It controls the rotation of the lifting motor through the lifting frequency converter and adjusts the rotation of the drum to realize the storage and release of the traction rope to achieve lifting and movement. It has a simple structure, is easy to use, and is suitable for loading and unloading operations. 5. The opening and closing of the grab bucket can be controlled by the switching frequency converter, which is suitable for scenarios that require opening and closing of the grab bucket. 6. The positioning scale component of the grab truck can be used to locate the movement position of the grab truck along the grab truck track, and accurately determine whether the grab has moved into place in the direction of the grab truck track, which is convenient to use; 7. The positioning scale of the grab truck and the positioning scale of the overhead crane use the same set of devices. The scale generator generates coded information along the scale sensing scale. When the vernier pointer moves on the grab truck, the electromagnetic scale sensing scale is used. The scale analyzer is connected to the coded information sensed by the vernier pointer to analyze and generate position information, which can accurately position the grab truck. 8. Multiple cameras can obtain the view from the side and below of the crane, which facilitates remote control of the crane's movement and the issuance of corresponding operation commands, and provides an understanding of the work site; 9. Through the switch, the PLC controller can be connected to multiple frequency converters to control the electrical equipment on the overhead crane that performs various actions, thereby increasing the crane's functionality and centralized control capabilities.

[0018] This utility model relates to a remote-controlled overhead crane system. The overhead crane is smoothly slidably installed on two overhead crane tracks. The main controller is connected to the on-board bridge of the overhead crane via a main control bridge, enabling remote control of the overhead crane's PLC controller. The PLC controller is connected to the overhead crane's frequency converter assembly, allowing remote control of the frequency converter to achieve corresponding actions. The movement of the overhead crane on the track assembly can be controlled by the overhead crane's travel frequency converter. In conjunction with the overhead crane positioning scale assembly, the movement of the overhead crane is accurately positioned. The main controller can remotely control various actions of the overhead crane, solving the problem of inaccurate positioning of the overhead crane in harsh manual working environments. Attached Figure Description

[0019] Figure 1 : This is a simplified structural diagram of the overhead crane system involved in this utility model; Figure 2 : This is a schematic diagram of the structural connection relationship of the overhead crane system involved in this utility model; Figure 3 : This is a schematic diagram of the structure of the grab bucket connected to the overhead crane; The components are as follows: 1-Crane track; 2-Crane; 20-Vehicle bridge; 21-PLC controller; 22-Switch; 23-Inverter assembly; 231-Crane travel inverter; 232-Lifting inverter; 233-Grab bucket travel inverter; 234-Opening and closing inverter; 24-Grab bucket track; 25-Grab bucket; 26-Camera; 27-Crane motor; 271-Crane roller; 28-Grab bucket motor; 281-Grab bucket roller; 3-Main controller; 4-Main control bridge; 5-Crane positioning scale assembly; 51-Scale sensing scale; 52-Scale generator; 53-Vernier pointer; 54-Scale analyzer; 6-Grab bucket positioning scale assembly; 7-Lifting device; 8-Grab bucket; 9-Opening and closing drive component. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary. The drawings are not drawn to scale and are intended to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Above the coal yard, overhead crane systems are often used for transportation, leveling coal powder, and other operations. The environment inside the yard is harsh and detrimental to the health of employees, so a remotely controllable overhead crane system is needed.

[0024] This utility model relates to a remotely controlled overhead crane system. The overhead crane 2 can be smoothly slidably installed via two fixed overhead crane tracks 1. A main controller 3 is connected to the onboard network bridge 20 on the overhead crane 2 via a main control network bridge 4. The main controller 3 can also be connected to a PLC controller 21 on the overhead crane 2, allowing remote control of the PLC controller 21 and its feedback, indirectly controlling the operation of the frequency converter assembly 23. The PLC controller 21 is connected to the overhead crane frequency converter, and by adjusting the frequency converter, the movement of the overhead crane 2 on the overhead crane tracks 1 is controlled. In conjunction with the overhead crane positioning scale assembly 5, the movement of the overhead crane 2 is precisely positioned, enabling it to be moved to the target work area for operation. The system allows remote control of the overhead crane 2's movement using the main controller, solving the problem of manual operation on the overhead crane 2 facing harsh working environments and the inability to accurately move and position the crane.

[0025] A remotely controlled overhead crane system, specifically, such as Figure 1-3As shown, the system includes a crane track 1, a crane 2, a main controller 3, a switch 22, a frequency converter assembly 23, and a crane positioning scale assembly 5. Two relatively spaced crane tracks 1 are fixedly installed. The crane 2 travels on both sides of the two crane tracks 1. The crane 2 is equipped with a PLC controller 21, an on-board bridge 20, and a switch 22. The main controller 3 is equipped with a main control bridge 4, which is used to communicate with the PLC controller 21 through the on-board bridge 20. The frequency converter assembly 23 is installed on the crane 2 and connected to the PLC controller 21. The frequency converter assembly 23 includes a crane travel frequency converter 231 for controlling the crane 2 to travel on the crane track 1. The crane 2 can be equipped with various frequency converters to regulate the corresponding electrical drive components to drive the actuators to achieve the corresponding actions. The crane travel control command information output terminal of the main controller 3 is connected to the signal input terminal of the main control bridge 4. The crane travel control command information output terminal of the main control bridge 4 is connected to the signal input terminal of the vehicle-mounted bridge 20 via wireless communication. The crane travel control command information output terminal of the vehicle-mounted bridge 20 is connected to the control command input terminal of the PLC controller 21. The crane travel frequency converter signal output terminal of the PLC controller 21 is connected to the control terminal of the crane travel frequency converter 231 via the switch 22. The control terminal of the crane travel frequency converter 231 is electrically connected to the crane motor 28, controlling the current direction and magnitude of the crane motor 28 to control the speed and direction of the crane motor. The crane motor 28 is connected to the crane roller 281 via transmission. The PLC controller 21, vehicle-mounted bridge 20, crane travel frequency converter 231, and switch 22 are all located on the crane 2. The main controller 3 and main control bridge 4 are located on the ground. The main controller 3 communicates with the vehicle-mounted bridge 20 through the main control bridge 4 to achieve remote communication with the PLC controller 21 on the crane 2, so that the main controller 3 can remotely control the control terminal of the crane travel frequency converter 231 on the crane 2 to produce corresponding actions and control the movement of the crane 2 on the crane track 1.

[0026] In operation, the main controller 3 sends various control commands to the vehicle-mounted bridge 20 via the main control bridge 4. The PLC controller 21 receives the control commands from the vehicle-mounted bridge 20, converts them into frequency conversion signals, and transfers them to the corresponding frequency converters. This causes the corresponding control terminals (actuators) of the frequency converters to perform corresponding actions, thereby enabling remote control of the overhead crane 2. For example, the main controller 3 sends overhead crane travel control commands to the vehicle-mounted bridge 20 via the main control bridge 4. The PLC receives the overhead crane travel control commands transferred from the vehicle-mounted bridge 4, generates an overhead crane travel frequency conversion signal, and transmits it to the overhead crane travel frequency converter 231. The overhead crane travel frequency converter 231 controls the speed and direction of rotation of the overhead crane motor 28, driving the rotation of the overhead crane rollers 281, thus enabling the overhead crane 2 to move on the overhead crane track 1.

[0027] like Figure 1As shown, the crane positioning scale assembly 5 includes a scale sensing scale 51, a scale generator 52, a vernier pointer 53 for electromagnetic induction connection to the scale sensing scale 51, and a scale analyzer 54. The scale sensing scale 51 is set on a crane track 11 along the length of the crane track 11. The vernier pointer 53 is set on the crane 2 corresponding to the scale sensing scale 51. The scale encoding information output terminal of the scale generator 52 is connected to the scale encoding information input terminal of the scale sensing scale 51. The scale analyzer 54 is used to generate positioning information based on the encoding information of the scale sensing scale 51 sensed by the vernier pointer 53. The positioning information receiving terminal of the PLC controller 21 is connected to the crane positioning signal output terminal of the scale analyzer 54. After obtaining the crane positioning information, it is transmitted to the main controller 3 through the vehicle-mounted network bridge 20 and the main control network bridge 4, providing a basis for the operator to judge whether the crane 2 has moved accurately into position. The scale sensor 51 has intersecting lines and parallel lines. The signal phase of the intersecting lines is the same as that of the parallel lines, and the address is "0". The signal phase of the intersecting lines is opposite to that of the parallel lines, and the address is "1". The address information is arranged in a digital code. The code information is different at different length positions on the scale sensor 51. The code information obtained by the electromagnetic induction of the vernier pointer 53 is a digital code. After the scale analyzer 54 analyzes the code information, the position information of the vernier pointer 53 can be determined, and the precise position of the vernier pointer 53 in the length direction of the scale sensor 51 can be determined.

[0028] The overhead crane system involved in this utility model can be equipped with a visual scanning system to acquire on-site visual information. The visual information is generated into point cloud information through a point cloud processing module. The main controller 3 determines the target work area based on the point cloud information and moves the overhead crane 2 to the corresponding target work area for operation. As an unmanned intelligent overhead crane system, it saves manpower and improves production efficiency and production costs.

[0029] In a specific plan, such as Figure 2 As shown, the overhead crane 2 is equipped with an overhead crane motor 27 connected to the overhead crane travel frequency converter 231. The overhead crane motor 27 drives the overhead crane rollers 271 of the overhead crane 2, which roll against the overhead crane track 1. When the overhead crane 2 needs to be moved, the main controller 3 sends a crane movement signal to the vehicle-mounted network bridge 20 through the main control network bridge 4. The vehicle-mounted network bridge 20 transmits the crane movement signal to the PLC controller 21, which in turn transmits it to the corresponding overhead crane travel frequency converter 231 in the frequency converter assembly 23. The overhead crane travel frequency converter 231 controls the rotation of the overhead crane motor 27 to control the rolling of the overhead crane rollers 271, thereby moving the overhead crane 2 to the target work area.

[0030] In one embodiment, such as Figure 2As shown, the overhead crane 2 is also equipped with a grab truck track 24 and a grab truck 25 adapted to travel on the grab truck track 24. The grab truck track 24 is set perpendicular to the overhead crane track 1, which facilitates the movement of the grab truck 25 in the horizontal and vertical directions to suit the operation.

[0031] In one embodiment, such as Figure 2 As shown, the grab truck 25 includes a lifting device 7 and a grab bucket 8. One end of the lifting device 7 is mounted on the overhead crane 2, and the other end has a grab bucket 8. The frequency converter assembly 23 includes a lifting frequency converter 232, which controls the lifting and moving of the lifting device 7, thereby controlling the lifting and moving of the grab bucket 8 to achieve simple operations such as loading, unloading, and moving. The lifting control command information output terminal of the main controller 3 is connected to the signal input terminal of the main control bridge 4. The lifting control command information output terminal of the main control bridge 4 is connected to the signal input terminal of the vehicle-mounted bridge 20 via wireless communication. The lifting control command information output terminal of the vehicle-mounted bridge 20 is connected to the control command input terminal of the PLC controller 21. The lifting frequency converter signal output terminal of the PLC controller 21 is connected to the control terminal (such as the lifting motor) of the lifting frequency converter 231 via the switch 22.

[0032] Based on the fact that the grab truck 25 is equipped with a lifting device 7, such as Figure 1 As shown, to improve the smoothness of the grab truck 25's movement, multiple grab truck tracks 24 can be set up, and the grab truck 25 travels on multiple grab truck tracks 24; the frequency converter assembly 23 includes a grab truck travel frequency converter 233 for controlling the movement of the grab truck 25 along the grab truck tracks 24. Through the grab truck tracks 24 and the grab truck 25, in conjunction with the overhead crane tracks 1 and the overhead crane 2, the range of motion of the grab truck 25 in the plane can be increased; the lifting mechanism is set on the grab truck 25, which can adjust the position of the grab bucket 8 to suit the operation.

[0033] The output terminal of the grab truck driving control command information of the main controller 3 is connected to the signal input terminal of the main control bridge 4. The output terminal of the grab truck driving control command information of the main control bridge 4 is connected to the signal input terminal of the vehicle-mounted bridge 20 via wireless communication. The output terminal of the grab truck driving control command information of the vehicle-mounted bridge 20 is connected to the control command input terminal of the PLC controller 21. The output terminal of the grab truck driving frequency converter signal of the PLC controller 21 is connected to the control terminal of the overhead crane driving frequency converter 231 via the switch 22. The principle of using the main controller 3 to control the driving of the grab truck 25 is the same as that of the overhead crane 2.

[0034] like Figure 1 As shown, both overhead crane tracks 1 are set horizontally and spaced apart vertically. The overhead crane 2 travels on both sides of the two overhead crane tracks 1. The grab bucket car track 24 is set vertically on the overhead crane 2 and is used to move the grab bucket car 25 vertically. This enables the horizontal and vertical lifting devices 7 to move the grab bucket 8 in three-dimensional space.

[0035] It is worth noting that the two overhead crane tracks 1 are not limited to straight tracks; they can be regular or irregular shapes such as curved tracks or circular tracks. If the overhead crane track 1 is a curved track or a circular passageway, the grab bucket car track 24 is arranged radially on the overhead crane 2.

[0036] In a preferred embodiment, the lifting device 7 includes a robotic arm, one end of which is slidably mounted on the grab bucket track 24, and the other end is connected to a grab bucket 8, which is used to move the grab bucket 8 to adjust its position and adjust the posture of the grab bucket 8 to be suitable for operations such as leveling and shoveling materials.

[0037] In another embodiment, such as Figure 3 As shown, the lifting device 7 includes a lifting motor connected to the lifting frequency converter 232 and a traction drum assembly. The traction drum assembly includes a drum connected to the output end of the lifting motor and a traction rope fixed to one end of the drum and wound around it. The other end of the traction rope is connected to the grab bucket 8. Multiple traction ropes can be used to pull the grab bucket 8, and the grab bucket 8 can be prevented from swaying using conventional PID control technology, or the grab bucket 8 can be guided by a vertical guide mechanism (such as a telescopic sleeve). The lifting frequency converter 232 controls the current magnitude and direction to control the rotation of the lifting motor. The rotation of the lifting motor drives the rotation of the drum to realize the loading and unloading of the traction rope, thereby lifting and moving the grab bucket 8. The structure is simple, easy to use, and suitable for loading and unloading operations.

[0038] In one embodiment, such as Figure 1 As shown, the inverter assembly 23 also includes a switching inverter 234, which is electrically connected to an opening / closing drive component 9 whose drive end is connected to the grab bucket 8. This drive component 9 is used to drive the opening and closing of the grab bucket 8. The drive end of the opening / closing drive component 9 is connected to one or both sides of the grab bucket 8, opening or closing the grab bucket 8 under the driving force of the drive end. The opening / closing control command information output terminal of the main controller 3 is connected to the signal input terminal of the main control bridge 4. The opening / closing control command information output terminal of the main control bridge 4 is wirelessly connected to the signal input terminal of the vehicle-mounted bridge 20. The opening / closing control command information output terminal of the vehicle-mounted bridge 20 is connected to the control command input terminal of the PLC controller 21. The opening / closing inverter signal output terminal of the PLC controller 21 is connected to the switching inverter 234 via a switch 22. The switching inverter 234 is used to control the opening and closing of the grab bucket 8. The opening / closing drive component 9 can also use a motor in conjunction with a traction drum assembly to move one or both sides of the grab bucket 8 to achieve opening and closing.

[0039] Optionally, the grab bucket 8 is equipped with a telescopic electric cylinder connected to the on / off frequency converter 234. The telescopic electric cylinder is also known as the on / off drive component 9. The telescopic electric cylinder is electrically connected to the on / off frequency converter 234, and its telescopic end is connected to one side of the grab bucket 8 for telescopic adjustment of the opening degree of the grab bucket 8. In use, the on / off frequency converter 234 controls the telescopic electric cylinder to extend and retract, driving one or both sides of the grab bucket 8 to rotate relative to each other to open and close the grab bucket 8.

[0040] Preferably, such as Figure 2 As shown, a grab truck 25 and a grab truck track 24 are provided with a grab truck positioning scale assembly 6, which is used to locate the position of the grab truck 25 moving along the grab truck track 24. Preferably, the grab truck positioning scale assembly 6 is the same as the crane positioning scale assembly 5, and also includes a scale sensing scale 51, a scale generator 52 electrically connected to the scale sensing scale 51, a vernier pointer 53 for the electromagnetic induction scale sensing scale 51, and a scale analyzer 54 electrically connected to the vernier pointer 53. The connection and usage methods are the same as those of the crane positioning scale assembly 5.

[0041] like Figure 1 As shown, multiple cameras 26 are spaced apart on the overhead crane 2; the multiple cameras 26 are located on both sides of the overhead crane 2 to obtain the direction of movement of the overhead crane 2 and the field view below, which are used to guide the moving overhead crane 2 to the target work area.

[0042] In actual use, two overhead crane tracks 1 are arranged longitudinally at intervals and laterally. The overhead crane 2 is connected to the two overhead crane tracks 1 on both sides of its longitudinal direction via overhead crane rollers 271. The overhead crane 2 is equipped with a PLC controller 21 (such as a Siemens 1500 PLC model) and an on-board network bridge 20 (such as a TP-Link TL-S5G model). The main controller 3 is located outside the working area of ​​the overhead crane 2 and is connected to the on-board network bridge 20 via a main control network bridge 4. The PLC controller 21 is connected to the overhead crane travel inverter 231 and the grab bucket travel inverter via a switch 22 (such as a TP-Link TL-SG2210P). The overhead crane 2 includes a frequency converter assembly 233, a lifting frequency converter 232, and a switching frequency converter 234 (such as ABB's ACS880-01-061A-3 signal), etc. The overhead crane 2 is equipped with an overhead crane motor 27 connected to the overhead crane travel frequency converter 231, and the overhead crane motor 27 is connected to the overhead crane rollers 271. The overhead crane 2 is equipped with a longitudinally arranged grab truck track 24, on which a grab truck 25 is mounted. The grab truck travel frequency converter 233 controls the speed and direction of rotation of the grab truck motor 28 to drive the grab truck 25 through the grab truck rollers 28. 1. Move along the grab truck track 24; the lifting frequency converter 232 controls the lifting device 7 on the grab truck 25, and the lifting end of the lifting device 7 is equipped with a grab bucket 8 (such as the Henan Yuzhong QZ-5 model); the lifting device 7 includes a lifting motor and a traction drum assembly connected to the output end of the lifting motor, which, together with the vertical guide mechanism on the overhead crane 2, realizes the lifting and moving of the grab bucket 8; the grab bucket 8 is equipped with a telescopic electric cylinder, and the opening and closing frequency converter 234 is electrically connected to the telescopic electric cylinder to control the telescopic movement of the telescopic electric cylinder to realize the opening and closing of the grab bucket 8; a scale sensor scale 51 is provided on one overhead crane track 1. The scale generator 52 is electrically connected to the scale sensor scale 51. The crane 2 is equipped with a vernier pointer 53 and a scale analyzer 54 electrically connected to the vernier pointer 53. The vernier pointer 53 is used to analyze the coded scale information on the scale sensor scale 51 sensed by the vernier pointer 53 to generate positioning information and accurately position the crane 2. Four cameras 26 are respectively set on the horizontal sides of the crane 2 to obtain the horizontal side and downward field of view. Similarly, the grab truck 25 and the grab truck track 24 are equipped with a grab truck positioning scale assembly 6 for longitudinal positioning of the grab truck 25.

[0043] The working principle of this overhead crane system is as follows: The main controller 3 communicates with the vehicle-mounted bridge 20 via the main control bridge 4, enabling it to send control commands to the PLC controller 21 and receive feedback from the PLC controller 21. The PLC controller 21 connects to multiple frequency converters in the frequency converter assembly 23 via the switch 22. These multiple frequency converters control the execution actions of different execution units to achieve the operation. The overhead crane travel frequency converter 231 controls the movement of the overhead crane 2 on the overhead crane track 1, and the grab bucket travel frequency converter 233 controls the grab bucket 25 on the overhead crane 2. The movement of the trolley on the track 24 is controlled by the lifting frequency converter 232, which controls the lifting and moving of the lifting device 7; the opening and closing frequency converter 234 controls the opening and closing of the grab bucket 8; when the overhead crane 2 moves, the vernier pointer 53 moves accordingly, transmitting the encoded information of the electromagnetically induced scale sensor 51 to the scale analyzer 54. The scale analyzer 54 interprets the scale encoding information into positioning information, which can be remotely controlled by the main controller to accurately position the overhead crane 2, solving the problem of the harsh working environment and inaccurate positioning of the overhead crane 2 when operating manually on the overhead crane 2.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A remotely controlled overhead crane system, comprising two relatively fixed overhead crane tracks (1) and an overhead crane (2) adapted to travel on the two overhead crane tracks (1), characterized in that: It also includes a main controller (3), a main control bridge (4), a crane positioning scale assembly (5), and a PLC controller (21), a vehicle-mounted bridge (20), a crane travel frequency converter (231), and a switch (22) installed on the crane (2). The crane travel control command information output terminal of the main controller (3) is connected to the signal input terminal of the main control bridge (4). The crane travel control command information output terminal of the main control bridge (4) is connected to the signal input terminal of the vehicle-mounted bridge (20) via wireless communication. The crane travel control command information output terminal of the vehicle-mounted bridge (20) is connected to the control command input terminal of the PLC controller (21). The crane travel frequency converter signal output terminal of the PLC controller (21) is connected to the control terminal of the crane travel frequency converter (231) via the switch (22). The crane positioning scale assembly (5) includes a scale sensing scale (51), a scale generator (52), a vernier pointer (53) mounted on the crane (2), and a scale analyzer (54). The scale sensing scale (51) is mounted on the crane track (1) along the length of the crane track (11). The scale generator (52) is mounted on the corresponding crane track (1). The scale encoding information output terminal of the scale generator (52) is connected to the scale encoding information input terminal of the scale sensing scale (51). The sensing terminal of the vernier pointer (53) is matched with the scale sensing scale (51). The sensing signal output terminal of the vernier pointer (53) is connected to the signal input terminal of the scale analyzer (54). The scale analyzer (54) is used to generate crane positioning information based on the encoding information of the scale sensing scale (51) sensed by the vernier pointer (53). The crane positioning information receiving terminal of the PLC controller (21) is connected to the crane positioning signal output terminal of the scale analyzer (54).

2. The remotely controlled overhead crane system as described in claim 1, characterized in that: The overhead crane (2) is also equipped with a grab car track (24) and a grab car (25) adapted to travel on the grab car track (24).

3. The remotely controlled overhead crane system as described in claim 2, characterized in that: The grab truck (25) has a lifting device (7) and a grab (8). The overhead crane (2) is equipped with a lifting frequency converter (232). The lifting end of the lifting device (7) is equipped with a grab (8). The lifting control command information output terminal of the main controller (3) is connected to the signal input terminal of the main control bridge (4). The lifting control command information output terminal of the main control bridge (4) is connected to the signal input terminal of the vehicle-mounted bridge (20) through wireless communication. The lifting control command information output terminal of the vehicle-mounted bridge (20) is connected to the lifting control command input terminal of the PLC controller (21). The lifting frequency converter signal output terminal of the PLC controller (21) is connected to the control terminal of the lifting frequency converter (232) through the switch (22).

4. A remotely controlled overhead crane system as described in claim 2 or 3, characterized in that: The output terminal of the grab truck driving control command information of the main controller (3) is connected to the signal input terminal of the main control bridge (4). The output terminal of the grab truck driving control command information of the main control bridge (4) is connected to the signal input terminal of the vehicle-mounted bridge (20) through wireless communication. The output terminal of the grab truck driving control command information of the vehicle-mounted bridge (20) is connected to the control command input terminal of the PLC controller (21). The output terminal of the grab truck driving frequency converter signal of the PLC controller (21) is connected to the grab truck driving frequency converter (233) through the switch (22).

5. The remotely controlled overhead crane system as described in claim 3, characterized in that: The lifting device (7) includes a lifting motor and a traction drum assembly that are connected to the lifting frequency converter (232) by circuit. The traction drum assembly includes a drum that is connected to the output end of the lifting motor and a traction rope that is fixed to the drum at one end and wound around the drum.

6. The remotely controlled overhead crane system as described in claim 3, characterized in that: The opening and closing control command information output terminal of the main controller (3) is connected to the signal input terminal of the main control bridge (4). The opening and closing control command information output terminal of the main control bridge (4) is connected to the signal input terminal of the vehicle bridge (20) via wireless communication. The opening and closing control command information output terminal of the vehicle bridge (20) is connected to the control command input terminal of the PLC controller (21). The opening and closing frequency conversion signal output terminal of the PLC controller (21) is connected to the opening and closing frequency converter (234) via the switch (22). The opening and closing frequency converter (234) is used to control the opening and closing of the grab bucket (8).

7. The remotely controlled overhead crane system as described in claim 1, characterized in that: The overhead crane (2) is equipped with an overhead crane motor (27) connected to the overhead crane travel frequency converter (231). The overhead crane motor (27) drives the overhead crane roller (271) of the overhead crane (2). The overhead crane roller (271) rolls against the overhead crane track (1).

8. A remotely controlled overhead crane system as described in claim 2 or 3, characterized in that: The grab truck (25) and the grab truck track (24) are provided with a grab truck positioning scale assembly (6) for positioning the position of the grab truck (25) moving along the grab truck track (24).

9. A remotely controlled overhead crane system as described in claim 8, characterized in that: The grab truck positioning scale assembly (6) includes a scale sensing scale (51), a scale generator (52) connected to the scale sensing scale (51), a vernier pointer (53) for sensing the scale sensing scale (51), and a scale analyzer (54) electrically connected to the vernier pointer (53).

10. A remotely controlled overhead crane system as described in claim 1, characterized in that: Multiple cameras (26) are spaced apart on the overhead crane (2).

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