Energy-saving iron and foreign matter removing system for belt conveyor

Abstract

The utility model relates to an energy-saving iron and foreign matter removing system for a belt conveyor. An existing electromagnetic iron remover works for a long time and consumes much power. Therefore, the energy-saving iron and foreign matter removing system for the belt conveyor comprises an electromagnetic iron remover which is arranged above the matched belt conveyor and is powered by an underground matched power supply, and further comprises an inductance coil easy to disassemble and assemble, a normally-open power switch and a lower computer, the normally-open power switch is arranged on a wire between the underground matched power supply and the electromagnetic iron remover, and the lower computer is connected with the normally-open power switch. The inductance coil easy to disassemble and assemble comprises M pairs of N wire quick connectors and a coil wound on an upper-layer rubber belt of the matched rubber belt conveyor, the upper-layer rubber belt of the matched rubber belt conveyor, coal flow and foreign matter possibly appearing on the coal flow can penetrate through the coil, and the two ends of the inductance coil easy to disassemble and assemble are connected with the signal input end of the lower computer respectively. The belt conveyor is scientific in design, reliable in operation, power-saving, energy-saving and suitable for being used in cooperation with the coal mine belt conveyor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of energy-saving de-ironing, foreign matter removing systems for adhesive tape conveyor. BACKGROUND

[0002] Coal is the main energy of our country, at present, our country coal mining mainly relies on underground mining. Because intelligent efficiency is high, artificial consumption is less, when carrying out coal mining, post workers will bear more responsibility, in order to intuitively alarm operating personnel, so as to take timely measures, avoid ironware into subsequent production process to cause damage to equipment, guarantee the efficient and stable operation of entire belt conveyor and associated production system.

[0003] The utility model discloses a kind of mobile self-discharging return electromagnet devices used in the field of mineral exploitation, belong to mechanical equipment field.It includes metal detector, return electromagnet device, return electromagnet device is composed of support, rail runway, electromagnet, mobile plate is hung on support, electromagnet is fixed at the top of mobile plate, electromagnet is contacted with rail runway with wheel or clamping groove mode, rail runway is fixed on the upper portion of support both ends, and the side of rail runway contacted with electromagnet is perpendicular to horizontal plane.Metal detector, return electromagnet device are connected with numerical control box respectively.

[0004] The utility model discloses a kind of self-discharging electromagnetic de-ironing device including de-ironing device body, the middle part of the body is provided with electromagnet, the outer side of the electromagnet is provided with iron discharge conveyor belt, the iron discharge conveyor belt is driven to rotate by being set drive arrangement, the lower side of the iron discharge conveyor belt is provided with stirring shaft, the both ends of the stirring shaft are rotatable and pass into the rack in the body, one end of the stirring shaft is provided with turbine, the upper portion of the turbine is engaged with worm, the both ends of the worm are coaxially provided with roller, the roller is rollingly cooperated with the iron discharge conveyor belt.Adopting the lower side of the iron discharge conveyor belt of electromagnetic de-ironing device is provided with stirring shaft, and stirring shaft is constantly turned over iron-containing material under electromagnet by turbine worm drive, this structure advantageously guarantees that iron-containing material can be fully exposed in the magnetic field of electromagnet when passing through electromagnet and is sucked out.

[0005] The utility model discloses a kind of magnetic repulsion type magnetic levitation belt conveyor based on machine vision, including drum, magnetic conveyor belt, levitation support

[0006] The device comprises a module, a machine vision module, and a frame. The rollers are antimagnetic rollers; the conveyor belt is a magnetic conveyor belt, rotatably connected to two antimagnetic rollers; the suspension support module includes an upper permanent magnet, an electromagnet, a lower permanent magnet, a support plate, and a support frame. The upper permanent magnet and electromagnet repel the magnetic conveyor belt, causing it to levitate, while the lower permanent magnet attracts it, also causing it to levitate; the machine vision module includes a camera and a computer. The camera simultaneously acquires images of the levitation gaps between the conveyor belt and multiple sets of suspension support modules. The computer analyzes the size of the levitation gaps based on the images and controls the electromagnet current to keep the conveyor belt stably suspended. This device has a simple structure, fast response, and reduced energy consumption.

[0007] The solutions described in the above three patents all utilize high-power electromagnets to remove ferrous foreign objects from coal streams. Under normal circumstances, ferrous foreign objects should not appear in the coal stream of a belt conveyor; occasionally, these objects are mainly clumps of mining anchor mesh or anchor bolts. High-power electromagnets are energized continuously, resulting in high energy consumption, and they cannot remove wood or other non-ferrous foreign objects (which are extremely rare).

[0008] Chinese invention patent application CN119644444A, published on March 18, 2025, discloses a method for detecting foreign objects in a conveyor belt, belonging to the field of metal detection technology in coal transportation. It includes a fluxgate sensor and a signal acquisition unit. The fluxgate sensor and signal acquisition unit are integrated into a single unit, with multiple integrated units forming a Doppler array structure. The signal acquisition unit includes an excitation signal generation section, a signal processing section, an AD acquisition section, and a data processing algorithm section. This metal detection device uses a non-magnetic bracket to fix the magnetic sensor above the conveyor belt. Using the magnetic field environment data when there is no abnormal metal as background, the magnetic sensor detects the magnetic anomaly signal generated by metal on the conveyor belt below, and connects to a local voice alarm or controls the conveyor belt to stop. It detects ferrous metals in the coal flow and determines their relative size and relative position after stopping, resulting in more accurate identification.

[0009] In the technical solution described in this invention, the external magnetic field excitation coils are all located above the coal on the conveyor belt. To avoid affecting the movement of the coal flow, the external magnetic field excitation coils should maintain a certain distance from the coal flow. Therefore, multiple integrated units must be used to construct a Doppler array structure, whose magnetic field linear density decreases rapidly as the distance between the external magnetic field excitation coils and the coal flow increases, resulting in huge energy consumption to maintain its operation. Summary of the Invention

[0010] The technical problem to be solved by this utility model is how to overcome the above-mentioned defects of the prior art and provide an energy-saving iron and foreign matter removal system for belt conveyors that is simple in structure, easy to install, and energy-saving in operation.

[0011] To solve the aforementioned technical problems, this energy-saving iron and foreign object removal system for belt conveyors includes an electromagnetic separator. This electromagnetic separator is installed above the belt conveyor and powered by an underground power supply. Its key feature is that it also includes a easily detachable inductor coil, a normally open power switch, and a lower-level device. The normally open power switch is located on the conductor between the underground power supply and the electromagnetic separator. The upper belt of the belt conveyor, the coal flow, and any foreign objects that may appear on the coal flow are sufficient to pass through the easily detachable inductor coil. This easily detachable inductor coil contains M×N turns. The wires are divided into M groups, each containing N turns of wire, and are cut. The wire ends on one side of the cut are connected one-to-one to the N pins of an N-wire plug, and the wire ends on the other side of the cut are connected one-to-one to the metal connectors in the N sockets of an N-wire socket. The N-wire plugs and N-wire sockets in the same group are plugged into each other to form M N-wire quick connectors. Each cut wire is detachably connected through the above M N-wire quick connectors. The two ends of the detachable inductor are connected to the input terminals of the lower-level machine signal.

[0012] When the lower-level machine senses an increase in magnetic flux within the easily detachable inductor coil, it determines that there is an iron foreign object in the coal flow. The lower-level machine then connects the power supply to the electromagnetic separator through a normally open power switch and resets after a predetermined time T. The predetermined time T is sufficient for the iron foreign object to be removed by the electromagnetic separator, where M and N are positive integers.

[0013] The lower-level machine can be composed of a PLC or a single-chip microcomputer, which can directly control the equipment and obtain the equipment status.

[0014] When the lower-level computer senses an increase in magnetic flux within the easily detachable inductor coil, it determines that there is a ferrous foreign object in the coal flow. The lower-level computer then connects the power supply to the electromagnetic separator via a normally open power switch and resets after a predetermined time T. This predetermined time T is sufficient for the ferrous foreign object to be removed by the electromagnetic separator. This design results in a simple, easily detachable inductor coil structure that is highly sensitive and easy to install and remove. When a ferrous foreign object rapidly passes through this easily detachable inductor coil with the coal flow, it generates a strong change in magnetic flux, ensuring sensitive detection. The electromagnetic separator does not need to operate for extended periods; it is only activated when a ferrous foreign object is detected upstream, thus saving power and energy.

[0015] As an optimization, it also includes a host computer, which is connected to the slave computer via signal lines, radio, or fiber optics to form a remote control network. The host computer is equipped with a display screen and a command input device. A first camera is installed above the conveyor belt upstream of the coal flow below the electromagnetic separator. The lens of the first camera points to the coal flow below and is connected to the signal input terminal of the slave computer. The coal flow image captured by the first camera is displayed on the display screen in real time. When the operator sees foreign objects in the coal flow image captured by the first camera, he inputs a closing command to the host computer through the command input device. The host computer transmits the closing command to the slave computer, and the slave computer connects the power supply to the electromagnetic separator through a normally open power switch.

[0016] The host computer can directly issue control commands, and the host computer sends commands to the slave computer, which then directly controls the corresponding equipment to perform the corresponding actions.

[0017] The display screen and input device can be a touch screen, a combination of a display screen and keyboard, a combination of a display screen and knobs or buttons, or a combination of a display screen, keyboard, and mouse. This design facilitates remote control by staff.

[0018] As an optimization, the electromagnetic separator is a self-unloading electromagnetic separator, which also includes a second camera. This second camera faces downwards from the electromagnetic separator and is connected to the signal input terminal of the lower-level machine. The image captured by the second camera is displayed in real time on the screen. With this design, the operator can use the second camera to check in real time whether the ferrous foreign objects adsorbed by the electromagnetic separator have been automatically unloaded to the adjacent conveyor belt. If not, the power supply to the electromagnetic separator will not be stopped; if so, the power supply to the electromagnetic separator will be stopped.

[0019] As an optimization, it also includes an alarm that is connected to the signal output terminal of the lower or upper computer. This design makes it easy to remind staff to start the electromagnetic separator for iron removal.

[0020] As an optimization, a third camera is installed downstream of the coal flow below the electromagnetic separator. The lens of this third camera faces the coal flow below and is connected to the signal input terminal of the lower-level machine. The image captured by the third camera is displayed in real time on the screen. This design makes it easier for operators to observe whether there are still foreign objects in the coal flow after passing through the electromagnetic separator.

[0021] As an optimization, a non-ferrous foreign object removal device is also installed downstream of the third camera. This device includes a pneumatic lifting platform and a pneumatic lifting inclined gate. The pneumatic lifting platform is positioned between the upper and lower belts of the conveyor belt system and includes a lower vertical telescopic cylinder and a platform. The pneumatic lifting inclined gate is positioned above the coal flow on the upper belt of the conveyor belt system and includes an upper vertical telescopic cylinder and an inclined gate. Both the upper and lower vertical telescopic cylinders include a cylinder body and a piston rod. The piston rod of the upper vertical telescopic cylinder points downwards, and the inclined gate is fixed on the outer end of its piston rod. The piston rod of the lower vertical telescopic cylinder points upwards, and the platform is fixed on the outer end of its piston rod. The platform and the inclined gate are opposite each other across the upper belt. The upper and lower vertical telescopic cylinders are connected to the high-pressure air supply pipes through electrically controlled operating valve groups, and their electrically controlled operating valve groups are connected to the signal output terminals of the lower-level machines. The side of the inclined gate near the center of the roadway is downstream of the coal flow, and the side near the roadway side is upstream of the coal flow.

[0022] The inclined gate intersects the longitudinal vertical bisector of the upper belt of the conveyor belt at an angle. With this design, if foreign objects are still found in the coal flow after passing through the electromagnetic separator, the pneumatic lifting platform and the pneumatic lifting inclined gate are activated automatically or manually. The pneumatic lifting platform leveles the upper belt, and the conveyor belt continues to run. As the coal flow containing foreign objects moves forward with the upper belt, it encounters the inclined gate, which guides the coal and foreign objects away from the conveyor belt. Then, the pneumatic lifting platform and the pneumatic lifting inclined gate return to their original positions, and the coal flow returns to normal.

[0023] As an optimization, a coal collection box is also installed in the roadway on one side of the non-ferrous foreign object removal device. The coal collection box is equipped with swivel casters, and guide rods are installed on both sides of the inclined gate. These guide rods are vertically fixed, and their inner sides are equipped with sliding grooves. The two sides of the inclined gate extend into the adjacent sliding grooves and can be raised and lowered along the grooves by the action of an upper vertical telescopic cylinder. With this design, when the inclined gate descends, the coal flow containing foreign objects is guided into the coal collection box for subsequent centralized cleaning.

[0024] The method of using the energy-saving iron and foreign matter removal system for belt conveyors of this utility model includes the following steps:

[0025] ①. Install the aforementioned energy-saving iron and foreign matter removal system for the belt conveyor on the belt conveyor and put it into use at the same time as the belt conveyor;

[0026] ②. When the lower computer senses an increase in magnetic flux in the easily detachable inductor coil, it determines that there is an iron foreign object in the coal flow. The lower computer connects the power supply of the electromagnetic separator through the normally open power switch and resets after a predetermined time T. The predetermined time T is sufficient for the iron foreign object to be removed by the electromagnetic separator.

[0027] When staff see foreign objects in the coal flow image captured by the first camera on the display screen, they input a closing command to the host computer via the command input device. The host computer then transmits this closing command to the slave computer, which connects the power supply to the electromagnetic separator via a normally open power switch.

[0028] When the staff sees the image captured by the second camera on the display screen, showing that the iron foreign objects on the electromagnetic separator are first attracted and then removed, they input a power-off command to the host computer through the command input device. The host computer then sends the power-off command to the slave computer, which cuts off the power supply to the electromagnetic separator through the normally open power switch.

[0029] ③. When the staff sees the coal flow image captured by the third camera on the display screen and determines that there are still foreign objects in the coal flow, and that the foreign objects are non-ferrous, they input a non-ferrous foreign object removal command to the host computer through the command input device. The host computer then transmits this command to the slave computer. Under the control of the slave computer, the piston rod of the lower vertical telescopic cylinder extends, causing the platform to flatten the upper conveyor belt above it. The piston rod of the upper vertical telescopic cylinder extends, causing the inclined gate to move downward, cutting off the coal flow. The upper conveyor belt of the conveyor belt passes between the lower edge of the inclined gate and the platform. Under the guidance of the inclined gate, the coal flow and the foreign objects in it detach from the upper conveyor belt of the conveyor belt and fall into the coal collection box. Then, under the control of the staff or the automatic control of the slave computer, the pneumatic lifting platform and the pneumatic lifting inclined gate reset, and the coal flow returns to normal.

[0030] This design allows for two advantages. First, the combination of easily detachable inductor coils and a lower-level machine can automatically open and close the electromagnetic separator to remove ferrous foreign objects. Second, with the help of a higher-level machine, first, second, and third cameras, and other equipment, the energy-saving iron and foreign object removal system for belt conveyors can be remotely controlled by humans to remove iron and foreign objects. The electromagnetic separator and non-ferrous foreign object removal device in this system are intermittent working devices, only working occasionally, thus saving electricity and energy.

[0031] As an optimization, the host computer or slave computer is also equipped with a machine learning module. This machine learning module, together with the host computer or slave computer, forms an intelligent visual detection and processing system. Based on images captured by the first, second, and third cameras, it outputs commands to control the slave computer or host computer, replacing the manual operation. With this design, while manual operation is being performed, the machine learning module, together with the host computer or slave computer, continuously accumulates the characteristics of foreign objects in the coal flow diagram, strengthens the machine learning model, and achieves automatic detection and processing of foreign objects.

[0032] This utility model relates to an energy-saving iron and foreign matter removal system for belt conveyors. It is scientifically designed, reliable in operation, and energy-saving, making it suitable for use with belt conveyors in coal mines. Attached Figure Description

[0033] The energy-saving iron and foreign matter removal system for belt conveyors of this utility model is further described below with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of one implementation method of the energy-saving iron and foreign matter removal system for this belt conveyor;

[0035] Figure 2 This is a schematic diagram of the normal state of the second implementation method of the energy-saving iron removal and foreign matter removal system for this belt conveyor;

[0036] Figure 3 This is a schematic diagram of the cross-section of the coal flow in the second implementation method of the energy-saving iron and foreign matter removal system for this belt conveyor;

[0037] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the energy-saving iron and foreign matter removal system for the belt conveyor (the solid arrows in the diagram indicate the direction of coal flow).

[0038] In the diagram: 1 is the electromagnetic separator, 2 is the underground power supply, 3 is the easily detachable inductor coil, 4 is the normally open power switch, 5 is the lower-level computer, 6 is the upper conveyor belt, 7 is the coal flow, 8 is the neutral plug, 9 is the neutral socket, 10 is the upper-level computer, 11 is the display screen, 12 is the command input device, 13 is the first camera, 14 is the second camera, 15 is the alarm, 16 is the third camera, 17 is the pneumatic lifting platform, 171 is the lower vertical telescopic cylinder, 172 is the platform, 18 is the pneumatic lifting inclined gate, 181 is the upper vertical telescopic cylinder, 182 is the inclined gate, 183 is the guide rod, 19 is the lower conveyor belt, 20 is the coal collection box, 21 is the conveyor belt roadway floor plate, 22 is the platform guide plate, 23 is the platform support plate, and 24 is the idler roller. Detailed Implementation

[0039] Implementation method one: such as Figure 1As shown, the energy-saving iron and foreign object removal system for this belt conveyor includes an electromagnetic separator 1, which is installed above the belt conveyor and powered by an underground power supply 2. Its key feature is that it also includes a detachable inductor coil 3, a normally open power switch 4, and a lower-level device 5. The normally open power switch 4 is installed on the conductor between the underground power supply 2 and the electromagnetic separator 1. Foreign objects that may appear on the upper belt 6, coal flow 7, and coal flow 7 of the belt conveyor can pass through the detachable inductor coil 3. The detachable inductor coil 3 contains M... The wires are divided into M groups, each containing N turns of wire, and are cut off. The wire ends on one side of the cut are connected to the N pins of an N-wire plug 8, and the wire ends on the other side of the cut are connected to the metal connectors in the N sockets of an N-wire socket 9. The N-wire plugs and N-wire sockets in the same group are plugged into each other to form M N-wire quick connectors. Each cut wire is detachably connected through the above M N-wire quick connectors. The two ends of the detachable inductor are connected to the input terminals of the lower-level machine signal.

[0040] If the N-line quick-connect connector uses an existing VGA interface (widely used between graphics cards and monitors, its plug has 15 pins and its socket has 15 holes), 20 VGA interfaces can be used with a 300-turn coil. In this case, N equals 15 and M equals 20.

[0041] When the lower computer 5 senses an increase in the magnetic flux inside the easily detachable inductor coil 3, it determines that there is an iron foreign object in the coal flow 7. The lower computer 5 connects the power supply of the electromagnetic separator 1 through the normally open power switch 4, and resets (i.e., de-energizes) after a predetermined time T (e.g., 3 minutes). The predetermined time T is sufficient for the iron foreign object to be removed by the electromagnetic separator, where M and N are positive integers.

[0042] It also includes a host computer 10, which is connected to the slave computer 5 via signal lines, radio, or fiber optics to form a remote control network. The host computer 10 is equipped with a display screen 11 and a command input device 12. A first camera 13 is installed above the conveyor belt upstream of the coal flow 7 below the electromagnetic separator 1. The lens of the first camera 13 points to the coal flow 7 below and is connected to the signal input terminal of the slave computer 5. The coal flow image captured by the first camera 13 is displayed in real time on the display screen 11. When the operator sees foreign objects in the coal flow image captured by the first camera 13, he inputs a closing command to the host computer 10 through the command input device 12. The host computer 10 transmits the closing command to the slave computer 5, and the slave computer 5 connects the power supply of the electromagnetic separator 1 through the normally open power switch 4.

[0043] The display screen 11 and the instruction input device 12 may be a touch screen, or a combination of a display screen and a keyboard, or a combination of a display screen, a keyboard and a mouse, or a combination of a display screen and a knob or button.

[0044] Figures 1-3 The instruction input device 12 is in the form of a button.

[0045] The electromagnetic separator 1 is a self-unloading electromagnetic separator (see CN214320509U), which also includes a second camera 14. The second camera 14 faces the bottom of the electromagnetic separator 1 and is connected to the signal input terminal of the lower-level machine 5. The image captured by the second camera 14 is displayed in real time on the display screen 11.

[0046] It also includes an alarm 15, which is connected to the signal output terminal of the lower-level machine 5 or the upper-level machine 10.

[0047] Implementation Method Two: (e.g.) Figure 2 , 3 As shown in Figure 4, a third camera 16 is installed downstream of the coal flow 7 below the electromagnetic separator 1. The lens of the third camera 16 is facing the coal flow 7 below it and is connected to the signal input terminal of the lower-level machine 5. The image captured by the third camera 16 is displayed in real time on the display screen 11.

[0048] Downstream of the third camera 16, a non-ferrous foreign object removal device is also provided. This device includes a pneumatic lifting platform 17 and a pneumatic lifting inclined gate 18. The pneumatic lifting platform 17 is positioned between the upper belt 6 and the lower belt 19 of the conveyor belt system. The pneumatic lifting platform 17 includes a lower vertical telescopic cylinder 171 and a platform 172. The pneumatic lifting inclined gate 18 is positioned above the coal flow 7 on the upper belt 6 of the conveyor belt system. The pneumatic lifting inclined gate 18 includes an upper vertical telescopic cylinder 181 and an inclined gate 182. Both the upper vertical telescopic cylinder 181 and the lower vertical telescopic cylinder 171 include a cylinder body and a piston rod. The outer end of the piston rod of the upper vertical telescopic cylinder 181 points downwards, and the inclined gate 182 is fixed to the outer end of its piston rod. The piston rod of the lower vertical telescopic cylinder 171 has its outer end pointing upwards, and the platform 172 is fixed on the outer end of its piston rod. The platform 172 and the inclined gate 182 are positioned opposite each other across the upper belt 6. The upper and lower vertical telescopic cylinders are connected to the high-pressure air supply pipe (not shown in the figure) through electrically controlled operating valve groups (not shown in the figure), and their electrically controlled operating valve groups are connected to the signal output terminal of the lower-level machine 5. The side of the inclined gate 182 adjacent to the center of the roadway is downstream of the coal flow 7, and the side adjacent to the roadway side is upstream of the coal flow 7. The inclined gate 182 intersects the longitudinal vertical bisector of the upper belt 6 of the conveyor belt at an incline.

[0049] Note: In this patent, the direction in which the coal flow 7 comes is considered upstream, and the direction in which the coal flow 7 goes is considered downstream.

[0050] A coal collection box 20 is also provided in the roadway on one side of the non-ferrous foreign object removal device. The coal collection box 20 is equipped with universal casters. Guide groove rods 183 are provided on both sides of the inclined gate 182. The guide groove rods 183 are vertically fixed and have sliding grooves on their inner sides. The two sides of the inclined gate 182 extend into the adjacent sliding grooves and can be raised and lowered along the sliding grooves under the drive of the upper vertical telescopic cylinder 181. The remaining structure is as shown in Embodiment 1, and is omitted.

[0051] The method of using the energy-saving iron and foreign matter removal system for belt conveyors of this utility model includes the following steps:

[0052] ①. Install the energy-saving iron removal and foreign matter removal system for the belt conveyor described in Embodiment 2 on the belt conveyor, and put it into use at the same time as the belt conveyor;

[0053] ②. When the lower computer 5 senses an increase in the magnetic flux inside the easily detachable inductor coil 1, it determines that there is an iron foreign object in the coal flow 7. The lower computer 5 connects the power supply of the electromagnetic separator 1 through the normally open power switch 4, and resets after a predetermined time T. The predetermined time T is sufficient for the iron foreign object to be removed by the electromagnetic separator 1.

[0054] When the staff sees a foreign object in the coal flow image captured by the first camera 13 on the display screen 11, they input a closing command to the host computer 10 through the command input device 12. The host computer 10 then transmits the closing command to the slave computer 5, which connects the power supply to the electromagnetic separator 1 through the normally open power switch 4.

[0055] When the staff sees the image captured by the second camera 14 through the display screen 11, showing that the iron foreign object on the electromagnetic separator 1 is first attracted and then removed, they input a power-off command to the host computer 10 through the command input device 12. The host computer 10 sends the power-off command to the slave computer 5, and the slave computer 5 cuts off the power supply to the electromagnetic separator 1 through the normally open power switch 4.

[0056] ③. For example Figure 3 , 4 As shown, when the staff sees the coal flow image captured by the third camera 16 on the display screen 11, and finds that there are still foreign objects in the coal flow 7, they determine that the foreign objects are non-ferrous objects. They input a non-ferrous object removal command to the host computer 10 through the command input device 12. The host computer 10 sends the non-ferrous object removal command to the slave computer 5. Under the control of the slave computer 5, the piston rod of the lower vertical telescopic cylinder 171 extends, causing the platform 172 to flatten the upper conveyor belt 6 above it. The piston rod of the upper vertical telescopic cylinder 181 extends, causing the inclined gate 182 to move down, cutting off the coal flow 7. The upper conveyor belt 6 of the conveyor belt passes between the lower edge of the inclined gate 182 and the platform 172. Under the guidance of the inclined gate 182, the coal flow 7 and the foreign objects in it are separated from the upper conveyor belt 6 of the conveyor belt and fall into the coal collection box 20.

[0057] Then, under the control of the staff or the automatic control of the lower-level machine 5, the pneumatic lifting platform 17 and the pneumatic lifting inclined gate 18 are reset, and the coal flow 7 returns to normal.

[0058] Implementation Method 3: The host computer 10 or the slave computer 5 is also equipped with a machine learning module (not shown in the figure). The machine learning module and the host computer 10 or the slave computer 5 form an intelligent visual detection and processing system. Based on the images captured by the first, second, and third cameras 13, 14, and 16, the system outputs commands to control the slave computer 5 or the host computer 10 instead of the operator. The remaining structure is as described in Implementation Method 2, and the figure is omitted.

[0059] The method of using the energy-saving iron and foreign matter removal system for belt conveyors of this utility model includes the following steps:

[0060] ①. Install the energy-saving iron removal and foreign matter removal system for the belt conveyor described in Embodiment 3 on the belt conveyor, and put it into use at the same time as the belt conveyor;

[0061] ②. When the lower computer 5 senses an increase in the magnetic flux inside the easily detachable inductor coil 1, it determines that there is an iron foreign object in the coal flow 7. The lower computer 5 connects the power supply of the electromagnetic separator 1 through the normally open power switch 4, and resets after a predetermined time T. The predetermined time T is sufficient for the iron foreign object to be removed by the electromagnetic separator 1.

[0062] When the intelligent vision detection and processing system detects foreign objects in the coal flow image captured by the first camera 13, it inputs a closing command to the host computer 10 through the command input device 12. The host computer 10 then sends the closing command to the slave computer 5, which connects the power supply to the electromagnetic separator through the normally open power switch 4.

[0063] When the intelligent vision detection and processing system detects that the image captured by the second camera 14 shows that the iron foreign object on the electromagnetic separator is first attracted and then removed, it inputs a power-off command to the host computer 10 through the command input device 12. The host computer 10 sends the power-off command to the slave computer 5, and the slave computer 5 cuts off the power supply to the electromagnetic separator 1 through the normally open power switch 4.

[0064] ③. When the intelligent visual detection and processing system detects that there are still foreign objects in the coal flow 7 in the coal flow image captured by the third camera 16, it determines that the foreign object is a non-ferrous foreign object. It then inputs a non-ferrous foreign object removal command to the host computer 10 through the command input device 12. The host computer 10 transmits this command to the slave computer 5. Under the control of the slave computer 5, the piston rod of the lower vertical telescopic cylinder 181 extends, causing the platform 172 to level the upper conveyor belt 6 above it. The upper vertical telescopic cylinder... When the piston rod of 181 extends, it causes the inclined gate 182 to move downward, cutting off the coal flow 7. The upper conveyor belt 6 of the conveyor belt passes between the lower edge of the inclined gate 182 and the platform 172. Under the guidance of the inclined gate 182, the coal flow 7 and foreign objects in it are separated from the upper conveyor belt 6 of the conveyor belt and fall into the coal collection box 21. Then, under the control of the staff or the automatic control of the lower machine 5, the pneumatic lifting platform 17 and the pneumatic lifting inclined gate 18 are reset, and the coal flow returns to normal.

Claims

1. An energy-saving iron and foreign matter removal system for a belt conveyor, comprising an electromagnetic iron separator, wherein the electromagnetic iron separator is installed above the belt conveyor and powered by an underground power supply, characterized in that: It also includes an easily detachable inductor coil, a normally open power switch, and a lower-level machine. The normally open power switch is installed on the conductor between the underground power supply and the electromagnetic separator. The upper conveyor belt, coal flow, and any foreign objects that may appear on the coal flow can pass through the easily detachable inductor coil. The easily detachable inductor coil contains M×N turns of wire. The wire is divided into M groups, each containing N turns of wire, and is cut off. The wire ends on one side of the cut are connected to the N pins of an N-wire plug, and the wire ends on the other side of the cut are connected to the metal connectors in the N sockets of an N-wire socket. The N-wire plugs and N-wire sockets in the same group are plugged into each other to form M N-wire quick connectors. Each cut wire is detachably connected through the above M N-wire quick connectors. The two ends of the easily detachable inductor coil are connected to the input terminals of the lower-level machine signal, where M and N are positive integers.

2. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 1, characterized in that: It also includes a host computer, which is connected to the slave computer via signal lines, radio, or fiber optics to form a remote control network. The host computer is equipped with a display screen and a command input device. A first camera is installed above the conveyor belt upstream of the coal flow below the electromagnetic separator. The lens of the first camera points to the coal flow below and is connected to the signal input terminal of the slave computer. The coal flow image captured by the first camera is displayed in real time on the display screen. When the operator sees foreign objects in the coal flow image captured by the first camera, he inputs a closing command to the host computer through the command input device. The host computer transmits the closing command to the slave computer, and the slave computer connects the power supply to the electromagnetic separator through a normally open power switch.

3. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 2, characterized in that: The electromagnetic separator is a self-unloading electromagnetic separator, which also includes a second camera. The second camera faces the bottom of the electromagnetic separator and is connected to the signal input terminal of the lower-level machine. The image captured by the second camera is displayed on the screen in real time.

4. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 1, characterized in that: It also includes an alarm that is connected to the signal output terminal of the lower or upper computer.

5. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 3, characterized in that: A third camera is installed downstream of the coal flow below the electromagnetic separator. The lens of the third camera is facing the coal flow below and is connected to the signal input terminal of the lower-level machine. The image captured by the third camera is displayed on the screen in real time.

6. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 5, characterized in that: Downstream of the third camera, a non-ferrous foreign object removal device is also installed. This device includes a pneumatic lifting platform and a pneumatic lifting inclined gate. The pneumatic lifting platform is positioned between the upper and lower belts of the conveyor belt system and includes a lower vertical telescopic cylinder and a platform. The pneumatic lifting inclined gate is positioned above the coal flow on the upper belt of the conveyor belt system and includes an upper vertical telescopic cylinder and an inclined gate. Both the upper and lower vertical telescopic cylinders include a cylinder body and a piston rod. The outer end of the piston rod of the upper vertical telescopic cylinder points downwards, and the inclined gate is fixed to the outer end of its piston rod. The piston rod of the lower vertical telescopic cylinder has its outer end facing upwards, and the platform is fixed on the outer end of its piston rod. The platform and the inclined gate are opposite each other through the upper belt. The upper and lower vertical telescopic cylinders are connected to the high-pressure air supply pipes through the electrically controlled operating valve groups, and the electrically controlled operating valve groups of the two are connected to the signal output terminal of the lower machine. The side of the inclined gate near the center of the roadway is downstream of the coal flow, and the side near the sidewall is upstream of the coal flow.

7. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 6, characterized in that: A coal collection box is also installed in the roadway on one side of the non-ferrous foreign object removal device. The coal collection box is equipped with universal casters. Guide groove rods are provided on both sides of the inclined gate. The guide groove rods are vertically fixed and have sliding grooves on their inner sides. The two sides of the inclined gate extend into the adjacent sliding grooves and can be raised and lowered along the sliding grooves by the upper vertical telescopic cylinder.

8. The energy-saving iron and foreign matter removal system for belt conveyors according to claim 7, characterized in that: The host computer or slave computer is also equipped with a machine learning module. This machine learning module, together with the host computer or slave computer, forms an intelligent visual detection and processing system. Based on the images captured by the first, second, and third cameras, it outputs instructions to control the slave computer or host computer instead of the operator.

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