An automatic ore-drawing device based on a PLC control platform

Abstract

The application relates to an automatic ore discharging device based on a PLC control platform, which comprises a remote operating platform, an automatic ore discharging unit controlled by the remote operating platform, a vehicle-mounted host computer and an ore discharging machine PLC control unit for receiving instructions of the automatic ore discharging unit, a vehicle-mounted terminal carrying the vehicle-mounted host computer, and an ore discharging machine in communication connection with the ore discharging machine PLC control unit. The application utilizes visual AI analysis, 3D laser scanning and PLC intelligent control technology to realize accurate control and automatic operation of an ore loading process, thereby improving ore transportation efficiency, reducing labor cost, improving a working environment and enhancing intrinsic safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore drawing, and in particular to an automatic ore drawing device based on a PLC control platform. BACKGROUND

[0002] In the mining industry, ore loading operation, as a key process connecting mining and transportation, directly affects the production efficiency and operational stability of the entire mine area in terms of operation efficiency, safety and cost control. For a long time, traditional ore loading operation mainly relies on manual operation mode, which is specifically manifested as follows: when the mine car or electric locomotive travels near the ore drawing port, the on-site operator needs to observe and judge the vehicle parking position by naked eye, manually control the baffle opening mechanism to adjust the baffle height, and then start the relevant equipment for ore loading. This operation mode has many significant defects:

[0003] Firstly, the operation efficiency is low and the accuracy is difficult to guarantee. The manual judgment of the vehicle parking position is easily affected by factors such as light, dust, visual fatigue, etc., resulting in large deviation of the mine car positioning, and the ore is easily spilled to the track or ground, which not only needs additional investment in manpower cleaning, but also prolongs the single loading cycle, seriously restricting the ore transportation efficiency; at the same time, the manual control of the baffle lifting and the starting and stopping of the vibration motor lacks precise coordination, often resulting in insufficient or overloaded loading, further increasing the adjustment cost of the subsequent transportation link.

[0004] Secondly, the labor intensity is high and the labor cost is high. The environment around the ore drawing port is poor, with long-term dust pollution, noise interference and ore rolling risks, and the operator needs to work continuously in this environment, with extremely high labor intensity and easy to cause occupational health problems; in addition, in order to ensure 24-hour continuous production, multiple groups of personnel need to be configured for shift work, resulting in a high proportion of labor cost in the mine operation cost, which is difficult to achieve the development goal of reducing cost and increasing efficiency.

[0005] Thirdly, the intrinsic safety level needs to be improved. During manual operation, the operator needs to be close to the moving parts and the mine car operating area, which is easy to cause safety accidents due to misoperation, equipment failure or accidental movement of the mine car; at the same time, the traditional operation mode lacks effective abnormal warning and emergency stop mechanism, and it is difficult to quickly respond to unexpected situations, further amplifying the safety risk.

[0006] In order to improve the above problems, the industry has tried to introduce simple electrical control devices to assist the operation, but such technology still has obvious limitations: on the one hand, it is difficult to accurately identify the position of the mine car and the loading state of the ore, and it is difficult to realize full-process automatic control, and manual intervention is still needed for adjustment; on the other hand, there is a lack of reliable fault judgment and redundancy protection mechanism, when the detection module has signal abnormalities or the driver misoperation causes the mine car to deviate from the position, the system cannot identify and correct in time, which is easy to cause loading failure or safety accidents, and it is difficult to meet the efficient, stable and safe operation requirements of the mine area. Therefore, developing an automatic ore unloading device with accurate identification, intelligent control and reliable protection function has become the key direction to solve the current industry pain points. SUMMARY

[0007] In order to solve the above problems existing in the prior art, the purpose of the present application is to provide an automatic ore unloading device based on a PLC control platform.

[0008] The technical scheme adopted by the present application is:

[0009] An automatic ore unloading device based on a PLC control platform, comprising a remote operation platform, an automatic ore unloading unit controlled by the remote operation platform, a vehicle-mounted host and an ore unloading machine PLC control unit for receiving instructions of the automatic ore unloading unit, a vehicle-mounted terminal carrying the vehicle-mounted host, and an ore unloading machine in communication connection with the ore unloading machine PLC control unit.

[0010] The automatic ore unloading unit comprises a detection module, an AI control module and a decision module, the detection module obtains the feedback of the state of the vehicle-mounted terminal to the AI control module, the AI control module generates an AI model and obtains an inference result, the decision module obtains the inference result of the AI model and sends instructions to the vehicle-mounted host and the ore unloading machine PLC control unit, and the vehicle-mounted host and the ore unloading machine PLC control unit control the vehicle-mounted terminal and the ore unloading machine respectively to execute instructions to complete automatic ore unloading.

[0011] As a preferred embodiment of the present application, the ore unloading machine comprises a mine bin, a vibrating discharge port connected with the mine bin and driven by the vibrating motor, an ore unloading bucket arranged at the vibrating discharge port, and a baffle driven by the electric hoist and used for controlling the ore unloading bucket to change state, and the ore unloading machine PLC control unit is used for controlling the electric hoist and the vibrating motor of the ore unloading machine; the vehicle-mounted terminal comprises a plurality of mine cars arranged in a mine tunnel and running on a track.

[0012] As a preferred embodiment of the present application, the detection module controls image detectors, speed detectors, alignment detectors and baffle detectors arranged in the mine tunnel, the image detectors are used to acquire current image information of the vehicle terminal, the speed detectors are used to acquire running states of the vehicle terminal, the alignment detectors are used to determine whether the vehicle terminal moves to a specified position, and the baffle detectors are used to acquire states of the baffle.

[0013] As a preferred embodiment of the present application, two side plates are respectively arranged at two sides of the ore-drawing bucket, two fixed sleeves are respectively arranged at an end of the ore-drawing bucket close to the mine car, each of the fixed sleeves is detachably installed with a guide rod, and a clamping groove is formed between the guide rod and the side plate, and the clamping groove is used to accommodate the baffle.

[0014] As a preferred embodiment of the present application, two sliding grooves are respectively arranged at two ends of two sides of the baffle, a connecting rod is arranged at a side of the baffle close to the mine car and is in sliding connection with the sliding grooves, and a lifting plate is arranged at a side of the baffle away from the mine car and is in sliding connection with the sliding grooves; the connecting rod cooperates with the mine car, and the lifting plate cooperates with the electric hoist.

[0015] As a preferred embodiment of the present application, two lifting rods are respectively arranged at two ends of the connecting rod, and two limiting rods are respectively arranged at one end of the two lifting rods away from the connecting rod; and any one of the limiting rods and the connecting rod are respectively located at two sides of the lifting rod.

[0016] As a preferred embodiment of the present application, a lifting hole is arranged on the lifting plate, the lifting hole is connected with the electric hoist, and two guide plates are respectively arranged at two ends of the side of the lifting plate away from the mine car and are in sliding connection with the two side plates.

[0017] As a preferred embodiment of the present application, two extension plates are respectively arranged at two ends of the baffle, each of the extension plates is provided with a set of transmission assemblies, each set of transmission assemblies comprises a rotating shaft penetrating and rotatingly arranged on the extension plate, and a gear is arranged at two sides of the rotating shaft; two gears on the same rotating shaft are respectively located at two sides of the extension plate, and the gears are used to drive the lifting plate and the connecting rod.

[0018] As a preferred embodiment of the present application, a gear rack one is arranged at two ends of the side of the lifting plate close to the mine car, and a gear rack two is arranged at two ends of the connecting rod and is fixedly connected with the two lifting rods; the gears on the two sides of the baffle are respectively in meshing connection with the gear rack one and the gear rack two.

[0019] As the preferred embodiment of the present application, each group of transmission assembly includes two rotating shafts, each of which is fixedly provided with a chain wheel, the two rotating shafts of the same group of transmission assembly are driven through a chain and a chain wheel, and the rack one and the rack two are engaged with at least one gear of the same group of transmission assembly at the same time.

[0020] As the preferred embodiment of the present application, the length of the limiting rod is greater than the distance between two adjacent mine cars, the loading space formed by the connecting rod has a length and a width, the length of the connecting rod is parallel to the track, and the length of the connecting rod is less than the length of any mine car.

[0021] The present application has the advantages that: the present application is an automatic ore unloading device based on a PLC control platform, which utilizes visual AI analysis, 3D laser scanning and PLC intelligent control technology to realize accurate control and automatic operation of the ore loading process, thereby improving ore transportation efficiency, reducing labor cost, improving working environment and enhancing intrinsic safety. When the mine car or electric locomotive runs to the specified discharge port, the system controls the electric hoist to lift the baffle first, and then starts the vibration motor to complete the accurate loading of the ore. The entire operation process does not require manual intervention, has the characteristics of high efficiency, stability and safety, and effectively improves the automation level of mine loading operation. The baffle is provided with a mechanical judgment structure, and secondary judgment is performed before ore unloading to avoid errors in the stopping position of the mine car caused by abnormal detection module or driver misoperation. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a related structure sectional view of the ore unloading bucket of the present application; Figure 1

[0025] Figure 3 Figure 1

[0026] Figure 4 is an explosion structural schematic diagram of the present application; Figure 2

[0027] Figure 5 is a logic relationship schematic diagram of the present application. DETAILED DESCRIPTION

[0028] ​​​​In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined object of the present application, the specific embodiments, structures, features and effects thereof according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0029] In combination Figures 1-5 An automatic ore loading device based on a PLC control platform, comprising a remote operation station, an automatic ore loading unit controlled by the remote operation station, a vehicle-mounted host computer and an ore loading machine PLC control unit for receiving instructions of the automatic ore loading unit, a vehicle-mounted terminal carrying the vehicle-mounted host computer, and an ore loading machine in communication connection with the ore loading machine PLC control unit, forming a complete intelligent system of mine overall perception, real-time interconnection, analysis and decision-making, autonomous learning, dynamic prediction and collaborative control, and realizing intelligent operation of the whole process of mine production.

[0030] The automatic ore loading unit comprises a detection module, an AI control module and a decision-making module, the detection module obtains feedback of the state of the vehicle-mounted terminal to the AI control module, the AI control module generates an AI model and obtains an inference result, and the decision-making module obtains the inference result of the AI model and sends instructions to the vehicle-mounted host computer and the ore loading machine PLC control unit, and the vehicle-mounted host computer and the ore loading machine PLC control unit control the vehicle-mounted terminal and the ore loading machine to execute instructions to complete automatic ore loading. By using advanced visual AI analysis, 3D laser scanning and PLC intelligent control technology, accurate control and automatic operation of the ore loading process are realized, thereby improving ore transportation efficiency, reducing labor cost, improving working environment and enhancing intrinsic safety.

[0031] Beneficially, the ore loading machine comprises a mine bin, a vibrating discharge port connected with the mine bin and driven by the vibration motor, an ore loading bucket 14 arranged at the vibrating discharge port, a baffle 17 driven by the electric hoist and used for controlling the ore loading bucket 14 to change state, and the ore loading machine PLC control unit is used for controlling the electric hoist and the vibration motor of the ore loading machine; the vehicle-mounted terminal comprises a plurality of mine cars 12 arranged in a mine tunnel 11 and running on a track 13. The discharge port position is fixed, which can meet various ore loading requirements. When the mine car 12 runs to the specified discharge port, the system controls the electric hoist to lift the baffle 17 through an automatic control process, and then starts the vibration motor to complete accurate loading of the ore. The whole operation process does not require manual intervention, has the characteristics of high efficiency, stability and safety, and effectively improves the automation level of loading operation in the mining area.

[0032] Benefically, the detection module controls image detectors, speed detectors, alignment detectors, and baffle detectors installed within the mine tunnel 11. The image detectors primarily employ 3D laser scanning technology, and the AI ​​control module possesses visual AI analysis capabilities. The image detectors acquire the current image information of the vehicle-mounted terminal, the speed detectors acquire the operating status of the vehicle-mounted terminal, the alignment detectors determine whether the vehicle-mounted terminal has moved to a designated position, and the baffle detectors acquire the status of the baffle 17. The electric hoist and vibratory motor are connected to a PLC controller and integrated into an industrial network to achieve precise control and real-time communication. Cameras are installed at key locations to monitor the entire operating environment. Furthermore, the vehicle-mounted equipment is upgraded, including the addition of an operating terminal supporting network connectivity, thereby enabling switching between three control modes: remote control, local control, and automatic control, comprehensively improving the intelligence and operational efficiency of the ore-discharging system.

[0033] Advantageously, a side plate 19 is fixedly provided on each side of the ore discharge hopper 14, and two fixing sleeves 21 are fixedly provided at the end of the ore discharge hopper 14 near the mine car 12. The two fixing sleeves 21 correspond to the two side plates 19 respectively. A guide rod 16 is detachably installed in each fixing sleeve 21. A groove 30 is formed between the guide rod 16 and the side plate 19. The groove 30 is used to accommodate the baffle 17. The groove 30 is adapted to the thickness of the baffle 17. When the baffle 17 descends, it is guided by the arc-shaped guide rod 16 to prevent the baffle 17 from being unable to return to its original position after being bumped.

[0034] Advantageously, the baffle 17 is placed vertically, having one side close to the mine car 12 and one side away from the mine car 12. Each end of the two sides of the baffle 17 is provided with a sliding groove 29. The side of the baffle 17 close to the mine car 12 has a connecting rod 22 slidably connected to the sliding groove 29, and the side of the baffle 17 away from the mine car 12 has a lifting plate 15 slidably connected to the sliding groove 29. The connecting rod 22 cooperates with the mine car 12, and the lifting plate 15 cooperates with the electric hoist. The electric hoist directly drives the lifting plate 15 to move, which in turn drives the baffle 17 to move via transmission.

[0035] Advantageously, a lifting rod 18 is fixedly provided at each end of the connecting rod 22, and a limiting rod 23 is fixedly provided at the end of each of the two lifting rods 18 away from the connecting rod 22. Either the limiting rod 23 and the connecting rod 22 are located on opposite sides of the lifting rod 18. The lifting rod 18, connecting rod 22, and limiting rod 23 form a "U" shape, used for mechanically determining whether the current position of the mine car 12 is appropriate, preventing malfunction of the sensors corresponding to the detection module or driver misoperation.

[0036] Beneficially, the lifting plate 15 is provided with a lifting hole 27 connected with the electric hoist, and two guide plates 28 are respectively fixed at the two ends of the lifting plate 15 away from the mine car 12 and are respectively connected with the two side plates 19. The guide plates 28 again limit the moving direction of the baffle 17, so as to ensure the accuracy of the baffle 17 when moving up and down.

[0037] Beneficially, the baffle 17 is respectively provided with an extension plate 20 at the two ends, each of the extension plates 20 is provided with a set of transmission assemblies, each set of transmission assemblies includes a rotating shaft penetrating and rotatingly arranged on the extension plate 20, and a gear 25 is arranged at the two sides of the rotating shaft, and the two gears 25 on the same rotating shaft are respectively located at the two sides of the extension plate 20, and the gears 25 are used for driving the lifting plate 15 and the connecting rod 22. When the transmission assembly is working normally, a dust cover is arranged outside the transmission assembly, and the transmission assembly is used for realizing that the lifting plate 15 and the connecting rod 22 on the two sides of the baffle 17 are away from each other or close to each other.

[0038] Beneficially, the lifting plate 15 is respectively provided with a rack one 26 at the two ends close to the mine car 12, the connecting rod 22 is provided with a rack two 31 fixedly connected with the two lifting rods 18, and the gears 25 on the two sides of the baffle 17 are respectively engaged with the rack one 26 and the rack two 31.

[0039] Beneficially, each set of transmission assemblies includes two rotating shafts, each of the rotating shafts is fixedly provided with a sprocket, the two rotating shafts of the same set of transmission assemblies are driven through a chain 24 and the sprocket, and the rack one 26 and the rack two 31 are engaged with at least one gear 25 in the same set of transmission assemblies at the same time. After the lifting plate 15 and the connecting rod 22 are moved, it is only necessary to ensure that the rack one 26 and the rack two 31 are not out of engagement.

[0040] Beneficially, the length of the limiting rod 23 is greater than the distance between two adjacent mine cars 12, the loading space formed by the connecting rod 22 has a length and a width, the length of the connecting rod 22 is parallel to the track 13, and the length of the connecting rod 22 is less than the length of any mine car 12. According to the length of the mine car, the length of the connecting rod 22 can be flexibly adjusted.

[0041] The working principle of the application is as follows:

[0042] In the initial state, the image detector, the speed detector, the alignment detector and the baffle detector are respectively arranged between the two tracks 13 in the mine tunnel 11 and are located at the position of the ore discharge hopper 14, and the baffle 17 is located in the clamping groove 30.

[0043] The image information of the mine car 12 is acquired by the image detector and compared with the database to determine whether the mine car 12 at the current position is in an empty state. If the mine car 12 at the current position is full, a signal is transmitted to the vehicle-mounted host computer, and the driver continues to drive the mine car 12 according to the received signal to control the plurality of mine cars 12 to move forward. If the mine car 12 at the current position is empty, a signal is transmitted to the vehicle-mounted host computer, and the driver controls the mine car 12 to stop moving according to the received signal, and then the alignment detector determines whether the position of the mine car 12 at the current position is qualified. If the parking position of the current mine car 12 is not within the set range, the driver fine-tunes the position of the mine car 12. In this process, the running state of the mine car 12 is fed back by the speed sensor.

[0044] After the position of the mine car 12 is qualified, the state of the baffle 17 is acquired by the baffle detector. The automatic ore-dumping unit controls the ore-dumping machine PLC control unit to issue an instruction according to the calculation result of the AI module. The electric hoist starts to control the baffle 17 to rise or fall. When the baffle 17 rises to a certain height away from the ore-dumping bucket 14, the lifting equipment inside the ore bin works to lift the ore to the discharge port. At the same time, the vibration motor starts to work, and the ore enters the loading space in the mine car 12 from the ore-dumping bucket 14.

[0045] During the rising of the baffle 17, the electric hoist drives the lifting plate 15 to rise through the steel rope. The rack one 26 moves together with the lifting plate 15. The rack one 26 is engaged with the gear 25 to drive the gear 25 to rotate. The gear 25 drives all the gears 25 to rotate synchronously through the rotating shaft, the chain wheel and the chain. The gear 25 drives the rack two 31 to move downward through engagement. The lifting rod 18, the connecting rod 22 and the limiting rod 23 move synchronously with the rack two 31. The lifting plate 15 and the connecting rod 22 move upward and downward relative to the baffle 17 respectively, and the moving distances of the two are in a proportional relationship.

[0046] At this time, if the detection module works normally and the parking position of the mine car 12 is appropriate, the limiting rod 23 will contact the end of the mine car 12 during the downward movement. If the detection module is abnormal or the driver makes a mistake to cause the parking position of the mine car 12 to have an error, the limiting rod 23 will not contact the end of the mine car 12 during the downward movement.

[0047] When the limiting rod 23 contacts the end of the mine car 12, the rack two 31 cannot continue to move relative to the sliding groove 29, that is, the connecting rod 22 and the baffle 17 have a tendency to keep the relative position unchanged at this moment. However, the electric hoist still controls the lifting plate 15 to move upward, so that the lifting plate 15 continues to rise at the original speed for a set distance, the baffle 17 is forced to rise, and the connecting rod 22 remains stationary, so that the baffle 17 is opened. At this time, the ore can normally flow into the current mine car 12 through the baffle 17.

[0048] When the limiting rod 23 is not in contact with the end of the mine car 12, the lifting plate 15 can be lifted to a set distance, and the lifting plate 15 and the connecting rod 22 can be normally moved up and down relative to the baffle 17, so that the baffle 17 does not move, at this time the baffle detector detects that the state of the baffle 17 does not change, and feedback information is fed back to the ore drawing machine PLC control unit, so that the ore drawing machine is controlled to stop working and not to draw ore, until the detection module is repaired or the driver adjusts the attitude of the mine car 12 again, the limiting rod 23 can be in contact with the end of the mine car 12, and then the ore drawing is carried out.

[0049] After the ore drawing is completed, the electric hoist controls the lifting plate 15 to descend, and the working process is opposite to the above-mentioned far away, so as to reset the baffle 17.

[0050] During the above-mentioned ore drawing process, when the length of the mine car 12 is relatively long, the image detector obtains the real-time state of the mine car 12 during the ore drawing process, if most of the ore is stacked at one end of the mine car 12, the ore drawing operation is stopped, the driver controls the mine car 12 to move, so that the ore drawing bucket 14 corresponds to the other end of the current mine car 12, and then the ore drawing is continued, so that the ore in the mine car 12 can be filled and the effective loading space of the mine car 12 can be fully utilized.

[0051] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application, any person skilled in the art can make some changes or modifications to the above-mentioned disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution of the present application, any modification, change and modification of the above-mentioned embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. An automatic ore-drawing device based on a PLC control platform, characterized in that: The application relates to a remote control station, an automatic ore-drawing unit controlled by the remote control station, a vehicle-mounted host for receiving instructions of the automatic ore-drawing unit and a drawing machine PLC control unit, a vehicle-mounted terminal carrying the vehicle-mounted host and a drawing machine in communication connection with the drawing machine PLC control unit. The automatic ore-drawing unit comprises a detection module, an AI control module and a decision module, the detection module feeds back the state of the vehicle-mounted terminal to the AI control module, the AI control module generates an AI model and obtains an inference result, the decision module obtains the inference result of the AI model and sends instructions to the vehicle-mounted host and the drawing machine PLC control unit, and the vehicle-mounted host and the drawing machine PLC control unit control the vehicle-mounted terminal and the drawing machine to execute the instructions to complete automatic ore-drawing. The drawing machine comprises a mine bin, a vibrating discharge port connected with the mine bin and driven by a vibrating motor, a drawing bucket arranged at the vibrating discharge port, a baffle driven by an electric hoist and used for controlling the drawing bucket to change the state, and the drawing machine PLC control unit is used for controlling the electric hoist and the vibrating motor of the drawing machine. The baffle is provided with a connecting rod in sliding connection with the chute on the side close to the mine car, and is provided with a lifting plate in sliding connection with the chute on the side away from the mine car. The connecting rod is matched with the mine car, the lifting plate is matched with the electric hoist, the baffle is provided with an extension plate at each end, each extension plate is provided with a set of transmission assemblies, each set of transmission assemblies comprises rotating shafts penetrating through and rotatably arranged on the extension plate, the rotating shafts are provided with gears on the two sides, the gears on the same rotating shaft are located on the two sides of the extension plate, and the gears are used for driving the lifting plate and the connecting rod; the lifting plate is provided with a rack one at each end on the side close to the mine car, the connecting rod is provided with a lifting rod at each end, the lifting rods are provided with a limiting rod at the ends away from the connecting rod, the limiting rods and the connecting rod are located on the two sides of the lifting rod, the connecting rod is provided with racks two in fixed connection with the lifting rods, and the gears on the two sides of the baffle are in meshing connection with the racks one and the racks two; each set of transmission assemblies comprises two rotating shafts, each rotating shaft is provided with a sprocket, the two rotating shafts of the same set of transmission assemblies are in transmission through a chain and a sprocket, the rack one and the rack two are in meshing connection with at least one gear in the same set of transmission assemblies at the same time, and the rack two cannot continuously move relative to the chute when the limiting rod contacts the end of the mine car.

2. The automatic ore-drawing device based on the PLC control platform according to claim 1, characterized in that: The detection module controls image detectors, speed detectors, alignment detectors and baffle detectors arranged in the mine tunnel, the image detectors are used to acquire current image information of the vehicle terminal, the speed detectors are used to acquire running states of the vehicle terminal, the alignment detectors are used to judge whether the vehicle terminal moves to a specified position, and the baffle detectors are used to acquire states of the baffle.

3. The automatic ore-drawing device based on the PLC control platform according to claim 1, characterized in that: Two side plates are fixedly arranged on two sides of the ore-drawing bucket, two fixed sleeves are fixedly arranged on one end of the ore-drawing bucket close to the mine car, the two fixed sleeves correspond to the two side plates respectively, one guide rod is detachably arranged in each fixed sleeve, a clamping groove is formed between the guide rod and the side plate, and the clamping groove is used for arranging the baffle.

4. The automatic ore-drawing device based on the PLC control platform according to claim 3, characterized in that: The lifting plate is provided with a lifting hole connected with the electric hoist, two guide plates are fixedly arranged on two ends of the lifting plate away from the mine car, and the two guide plates are slidably connected with the two side plates respectively.

5. The automatic ore-drawing device based on the PLC control platform according to claim 3, characterized in that: The length of the limiting rod is greater than the distance between two adjacent mine cars, the loading space formed by the connecting rod has a length and a width, the length of the connecting rod is parallel to the track, and the length of the connecting rod is less than the length of any mine car.

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