A three-stage cleaning device for a mine belt conveyor

Abstract

The application provides a three-stage scraping device of a mine belt conveyor applied to the field of conveyor cleaning, which is characterized in that the three-stage scraping device is installed below the frame to clean the lower surface of the belt return end, so that the belt return end sequentially undergoes water flow flushing, rubber scraper scraping and air flow drying, the water immersion bin is installed outside the spray pipe, four inside the water immersion bin are arranged to guide the belt return end, so that the belt return end protrudes downward to immerse in the water gathered in the water immersion bin, the material is separated from the belt surface in a soaking manner, the separation of the adhered material is easier to realize, the overall efficiency of the cleaning during the belt return process is improved, the cleaned material is uniformly transported for reuse through the gathering of the receiving hopper and the rotary conveying of the conveying belt, and resource waste is avoided to a certain extent.

Description

Technical Field

[0001] This application relates to the field of conveyor cleaning, and in particular to a three-stage scraping device for a mining belt conveyor. Background Technology

[0002] Mining conveyors are mechanical devices used to transport ores and materials. They typically consist of an outer frame, conveyor rollers, a conveyor belt, and a motor. They can continuously transport materials and are widely used in the current mining and processing industries.

[0003] During the material transport process of mining belt conveyors, some materials or slag may stick to the surface of the conveyor belt. During the return trip, the stuck materials and slag are oriented downwards. Under the influence of gravity and the vibration generated during the operation of the machinery, the stuck materials and slag fall downwards during the return trip. After long-term use, excessive materials and slag will accumulate under the mining belt conveyor. Since the space under the conveyor is usually narrow, it is inconvenient to clean, and the labor intensity of manual cleaning is greatly increased. The falling and accumulation of materials not only affects the cleanliness of the bottom of the mining belt conveyor, but also causes waste of materials and slag.

[0004] To address these issues, a three-stage scraping device for mining belt conveyors is proposed to solve some of the problems existing in the prior art. Summary of the Invention

[0005] The purpose of this application is to solve the problem in the prior art of material adhesion during the return stroke of mining belt conveyors, which causes material to fall below the conveyor, resulting in inconvenient cleaning and material waste. Compared with the prior art, this application provides a three-stage scraping device for mining belt conveyors, including a frame. Symmetrically arranged conveyor rollers are rotatably mounted on the left and right ends of the frame, and a belt is driven between the two conveyor rollers. An electrical control box is installed below the frame, and sensors for detecting material at the return end of the belt are installed on the frame. A three-stage scraping assembly is fixedly installed at the bottom of the frame in the belt return direction, and the three-stage scraping assembly includes... The device includes a spray pipe and a fixing plate installed longitudinally below the lower surface of the belt return end. Multiple nozzles facing the belt are evenly fixed and connected to the spray pipe. A water pump a is fixedly installed below the frame, and the inlet of water pump a is connected to a clean water source. The outlet of water pump a is connected to the inside of the spray pipe. The fixing plate is designed with a downward tilting structure. A rubber scraper that fits tightly against the lower surface of the belt return end is fixedly installed at the upper end of the fixing plate. The inside of the fixing plate is designed with a hollow structure. Multiple air knife nozzles connected to the hollow structure are evenly opened on the end wall of the fixing plate away from the spray pipe. An air pump is connected to the hollow structure inside the fixing plate.

[0006] A material receiving hopper fixedly installed at the bottom of the frame is sleeved on the outer side below the three-stage material scraping assembly. The outer shape of the material receiving hopper is set as a funnel-shaped structure. A square pipe is fixedly connected to the bottom of the material receiving hopper. Two symmetrically arranged roller columns are rotatably connected inside the square pipe. A conveyor belt is movably sleeved between the two roller columns, and a servo motor is externally connected to the roller columns.

[0007] By installing the three-stage material scraping assembly below the frame, the lower surface of the return end of the belt is cleaned, enabling it to successively undergo operations such as water flow flushing, rubber scraper scraping, and air flow drying, achieving the cleaning of sticky slag, ensuring the subsequent dryness of the belt surface, which is beneficial to enhancing the comprehensiveness and efficiency of cleaning during the belt return process. At the same time, through the convergence of the material receiving hopper and the rotational conveyance of the conveyor belt, the cleaned materials are uniformly conveyed and reused, which helps to avoid resource waste.

[0008] Furthermore, a material receiving hopper fixedly installed at the bottom of the frame is sleeved on the outer side of the spray pipe. Four longitudinally arranged guiding rollers are rotatably connected inside the material receiving hopper. The return end of the belt movably passes through between the four guiding rollers and forms an inverted "ji" - shaped structure after being guided by them.

[0009] Furthermore, two spray pipes are provided. The two spray pipes are respectively arranged on the left and right sides inside the immersion bin, and the nozzles face the vertical surface of the belt in their corresponding directions.

[0010] Optionally, the left and right side walls of the immersion bin are set as outwardly inclined structures. The connection between the left and right side walls and the bottom wall of the immersion bin is set as a circular arc transition structure. A push plate perpendicular to its bottom is slidably installed inside the immersion bin. Longitudinally arranged winding rollers are rotatably installed on both the left and right sides inside the immersion bin. A servo motor is externally connected to the winding rollers. A pulling rope is commonly wound and connected on the two winding rollers. The middle position of the pulling rope is fixedly connected to the top of the push plate.

[0011] Furthermore, guide rails adapted to the movement trajectory of the push plate are fixedly installed on the front and rear side walls of the immersion bin. Rollers symmetrically clamped on the upper and lower sides of the guide rails are rotatably connected on both the front and rear side walls of the immersion bin.

[0012] Furthermore, the bottom of the push plate is in contact with the bottom of the immersion bin. A brush is fixedly installed on the top of the push plate, and the brush is in close contact with the lower surface of the return end of the belt.

[0013] Furthermore, a traction roller longitudinally rotatably installed inside the immersion bin is provided between the guiding roller and the winding roller on the same side. The traction roller is located below the lower surface of the return end of the belt, and the pulling rope movably passes through below the traction roller.

[0014] Optionally, the bottom of the square tube is fixedly connected to a filter box located directly below the receiving hopper, and a filter element is movably inserted inside the filter box. The conveyor belt is configured as a filter screen structure. A water pump b and a water storage tank are fixedly installed below the frame. The inlet of the water pump b is fixedly connected to the bottom of the filter box, and the outlet of the water pump b is fixedly connected to the upper part of the inside of the water storage tank.

[0015] Furthermore, a T-shaped pipe is fixedly connected to the inlet of water pump a, and the other two ends of the T-shaped pipe are respectively connected to the clean water source and the bottom of the water storage tank.

[0016] Furthermore, a liquid level sensor a is fixedly installed on the inner wall of the filter box, located below the filter element; a liquid level sensor b is fixedly installed on the inner wall of the water storage tank; a solenoid valve a is installed in the end of the three-way pipe that connects to the clean water source; and a solenoid valve b is installed in the end of the three-way pipe that connects to the bottom of the water storage tank.

[0017] Compared to existing technologies, the advantages of this application are:

[0018] (1) This application cleans the lower surface of the belt return end by installing a three-stage scraping assembly under the frame, so that it goes through water flow rinsing, rubber scraper scraping and airflow drying in sequence, thereby cleaning the sticky residue and ensuring that the belt surface is dry afterward. This is conducive to improving the comprehensive and efficient cleaning during the belt return process. At the same time, the cleaned material is uniformly transported and reused by the collection of the receiving hopper and the rotation of the conveyor belt, which helps to avoid resource waste.

[0019] (2) By installing the immersion chamber on the outside of the spray pipe and setting four guides for the return end of the belt inside the immersion chamber, the return end of the belt protrudes downward and is immersed in the water gathered inside the immersion chamber. The immersion method softens the material and the surface of the belt, making it easier to remove the sticky material.

[0020] (3) By setting the left and right end walls of the immersion chamber to be inclined outwards and setting the connection between the left and right end walls and the bottom end wall to be an arc structure, and with the push plate that can slide left and right inside the immersion chamber, the accumulated material in the immersion chamber can be pushed out, avoiding the material that has been washed off from accumulating in the immersion chamber for a long time and affecting the normal operation of the device, thus effectively ensuring the long-term stability of the device during operation.

[0021] (4) By fixing the brush to the top of the belt and making the brush fit against the lower surface of the belt return end, the brush can be driven to wash the lower surface of the belt return end that is soaked in water during the left and right movement of the belt, which further improves the comprehensiveness of cleaning the lower surface of the belt return end.

[0022] (5) By setting the conveyor belt as a filter screen structure, it can separate the material and sewage that fall after rinsing. The filter box with the filter core inserted inside is connected to the bottom of the square tube, which can realize the filtration and collection of sewage. By connecting the three-way pipe to the inlet of water pump a and connecting one end of the three-way pipe to the bottom of the water storage tank, the filtered water collected in the water storage tank can be pumped back for reuse during the start-up of water pump a. This is conducive to the reuse of water resources and improves the energy saving and environmental protection of the device to a certain extent.

[0023] (6) By installing the liquid level sensor b inside the water storage tank and installing solenoid valves a and b at the two ends of the three-way pipe respectively, the use of clean water source and filtered water is controlled, so that the device prioritizes the use of filtered water, realizes the rational use of water flow, and further improves the water-saving performance of the device. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present application;

[0025] Figure 2 This is an exploded view of this application;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0027] Figure 4 This is a top view of this application;

[0028] Figure 5 for Figure 4 Sectional view at point BB;

[0029] Figure 6 for Figure 4 Sectional view at point CC;

[0030] Figure 7 This is a perspective view of the fixing plate, rubber scraper, and air knife nozzle of this application;

[0031] Figure 8 This is a perspective view of the belt and guide roller of this application;

[0032] Figure 9 This is a perspective view of the internal structure of the immersion chamber in this application;

[0033] Figure 10 This is a disassembled view of the square tube and filter box internal structure of this application.

[0034] Explanation of the labels in the diagram:

[0035] 1. Frame; 101. Conveyor roller; 102. Belt; 2. Spray nozzle; 201. Nozzle; 202. Water pump a; 203. Fixing plate; 204. Rubber scraper; 205. Air knife nozzle; 3. Receiving hopper; 301. Square tube; 302. Roller column; 303. Conveyor belt; 4. Immersion tank; 401. Guide roller; 5. Push plate; 501. Guide rail; 502. Roller; 503. Take-up roller; 504. Pull rope; 505. Traction roller; 6. Filter box; 601. Filter element; 602. Water pump b; 603. Water storage tank. Detailed Implementation

[0036] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0037] Example 1:

[0038] This invention provides a three-stage scraping device for a mining belt conveyor. Please refer to [link / reference]. Figure 1 - Figure 10 The system includes a frame 1, with symmetrically arranged conveyor rollers 101 rotatably mounted at both ends of the frame 1. A belt 102 is connected between the two conveyor rollers 101. An electrical control box is installed below the frame 1. Sensors for detecting material at the return end of the belt 102 are installed on the frame 1. A three-stage scraping assembly is fixedly installed at the bottom of the frame 1 in the return direction of the belt 102. The three-stage scraping assembly includes a nozzle 2 longitudinally installed below the lower surface of the return end of the belt 102 and a fixing plate 203. Multiple nozzles 2 are uniformly fixed and connected to the nozzle 2 and are oriented towards the belt 102. 01. A water pump a202 is fixedly installed below the frame 1, and the inlet of the water pump a202 is connected to a clean water source. The outlet of the water pump a202 is connected to the inside of the nozzle 2. The fixing plate 203 is set to a downward inclined structure. A rubber scraper 204 that is tightly attached to the lower surface of the return end of the belt 102 is fixedly installed on the upper end of the fixing plate 203. The inside of the fixing plate 203 is set to a hollow structure. Multiple air knife nozzles 205 that are connected to the hollow structure are evenly opened on the end wall of the fixing plate 203 away from the nozzle 2. An air pump is connected to the hollow structure inside the fixing plate 203.

[0039] The lower outer side of the three-stage scraping assembly is fitted with a receiving hopper 3 fixedly installed at the bottom of the frame 1, and the receiving hopper 3 is designed as a funnel-shaped structure. The bottom of the receiving hopper 3 is fixedly connected to a square tube 301, and two symmetrically arranged rollers 302 are rotatably connected inside the square tube 301. A conveyor belt 303 is movably sleeved between the two rollers 302, and a servo motor is connected to the outside of the rollers 302.

[0040] During the material conveying process of a mining belt conveyor, some material or slag may adhere to the surface of the belt 102. During the return trip of the belt 102, the direction of the adhered material or slag is adjusted to downward. Under the influence of gravity and the vibration of the machine during operation, the adhered material or slag will fall downward during the return trip. After long-term use, excessive material and slag will accumulate under the frame 1 of the mining belt conveyor. Since the space under the frame 1 is relatively narrow, it is inconvenient to clean, which not only affects the cleanliness of the bottom of the mining belt conveyor, but also causes waste of material and slag. At this time, the staff connects this device to an external power source through wires, so that the external power source provides power support for this device. Then, the device is started. During the operation of this device with water and electricity, the sensor installed on the frame 1 detects that there is material adhering to the lower surface of the return end of the frame 1. The sensor can be an image recognition sensor. By acquiring the image of the lower surface of the return end of the belt 102, it is determined whether there is material adhering.

[0041] When it is determined that material is adhering to the return end of belt 102, the electrical control box controls water pump a202 to start, pumping external clean water into spray pipe 2. The water is then sprayed through nozzle 201 onto the lower surface of the return end of belt 102, causing the adhering material to fall off under the impact of the water flow. As belt 102 continues to move, it is scraped by the rubber scraper 204 on top of the fixing plate 203. Simultaneously, an external air pump starts to blow air onto the lower surface of the return end of belt 102 to dry it. The return end of belt 102 continues to move... During the process, the material is successively subjected to water rinsing, scraping by the rubber scraper 204, and blowing by the airflow. The combination of these three methods can effectively achieve the cleaning operation of the return end of the belt 102 and ensure that the outer surface of the belt 102 is dry after cleaning. The cleaned material falls downward into the receiving hopper 3, and after being collected by the receiving hopper 3, it falls onto the conveyor belt 303. After the external servo motor is started, it drives the conveyor belt 303 to rotate, and transports the scraped and collected material outward for recycling and reuse.

[0042] This application cleans the lower surface of the return end of the belt 102 by installing a three-stage scraping assembly under the frame 1. The assembly undergoes water rinsing, rubber scraper 204 scraping, and airflow drying in sequence to remove sticky residue and ensure that the surface of the belt 102 is dry afterward. This improves the comprehensiveness and efficiency of cleaning during the return process of the belt 102. At the same time, the collected material is conveyed and reused by the receiving hopper 3 and the rotating conveyor belt 303, which helps to avoid resource waste.

[0043] Please see Figure 2 , Figure 5 and Figure 8, a receiving hopper 3 fixedly installed at the bottom of the frame 1 is sleeved outside the nozzle 2, and four longitudinally arranged guiding rollers 401 are rotatably connected inside the receiving hopper 3. The return end of the belt 102 is movably inserted between the four guiding rollers 401 and forms an inverted "ji" - shaped structure after being guided by them. When the device works, under the guiding and supporting effects of the four guiding rollers 401, the return end of the belt 102 sinks downward into the soaking bin 4. When the belt 102 is washed with water by the nozzle 201, the excess water converges inside the soaking bin 4, enabling the belt 102 to be soaked for a long time inside the soaking bin 4. In this application, by installing the soaking bin 4 outside the nozzle 2 and arranging four guiding rollers 401 inside the soaking bin 4 to guide the return end of the belt 102, the return end of the belt 102 protrudes downward and is soaked in the water converged inside the soaking bin 4. Through the soaking method, the material between the surface of the belt 102 becomes soft, making it easier to realize the operation of separating the adhered material.

[0044] Please refer to Figure 8 , there are two nozzles 2 in total, and the two nozzles 2 are respectively arranged on the left and right sides inside the soaking bin 4. The nozzle 201 faces the vertical surface of the belt 102 in its corresponding direction. When the device works, by symmetrically arranging the two nozzles 2 on the left and right sides of the "ji" - shaped structure at the return end of the belt 102, the clamping and washing of the lower surface of the return end of the belt 102 can be realized, which is beneficial to improving the effect of washing and cleaning the return end of the belt 102.

[0045] Embodiment 2:

[0046] The present invention provides a three - stage scraping device for a mine belt conveyor. Please refer to Figure 1 - Figure 10 , the left and right side walls of the soaking bin 4 are set to be inclined outward, and the connection between the left and right side walls of the soaking bin 4 and its bottom wall is set to be a circular arc transition structure. A push plate 5 perpendicular to its bottom is slidably installed inside the soaking bin 4. Longitudinally arranged winding rollers 503 are rotatably installed on the left and right sides inside the soaking bin 4. The winding rollers 503 are externally connected to a servo motor, and a pulling rope 504 is wound and connected to the two winding rollers 503 together. The middle position of the pulling rope 504 is fixedly connected to the top of the push plate 5.

[0047] When the device is working, the servo motors connected to the left and right take-up rollers 503 start alternately. When the left take-up roller 503 rotates under the drive of the servo motor, it winds the pull rope 504 to the left, causing the pull rope 504 to pull the push plate 5 to move to the left. When the right take-up roller 503 rotates under the drive of the servo motor, it winds the pull rope 504 to the right, causing the pull rope 504 to pull the push plate 5 to move to the right. Only one of the servo motors connected to the left and right take-up rollers 503 will start at a time. Through their alternating start, the pull rope 504 is wound up, thus moving the push plate 5 to the right. Driven by left and right movement, the pusher plate 5 moves left and right inside the immersion chamber 4, pushing the material deposited at the bottom of the immersion chamber 4 to the left and right sides. In operation, this application sets the left and right end walls of the immersion chamber 4 to an outward inclined structure and sets the connection between the left and right end walls and the bottom end wall to an arc structure. With the pusher plate 5, which can slide left and right inside the immersion chamber 4, the material accumulated in the immersion chamber 4 can be pushed out, avoiding the material washed off from accumulating in the immersion chamber 4 for a long time and affecting the normal operation of the device, effectively ensuring the long-term stability of the device during operation.

[0048] Please see Figure 5 and Figure 9 The front and rear end walls of the immersion chamber 4 are fixedly equipped with guide rails 501 that are adapted to the movement trajectory of the push plate 5. Rollers 502 symmetrically clamped on the upper and lower sides of the guide rails 501 are rotatably connected to the front and rear end walls of the push plate 5. When the device is working, by rotatably connecting the rollers 502 symmetrically clamped on the upper and lower sides of the guide rails 501 to the front and rear end walls of the push plate 5, the stability of the push plate 5 during the left and right sliding process can be limited, so that the push plate 5 always remains perpendicular to the bottom end wall and the left and right end walls of the immersion chamber 4 during the movement, thereby ensuring its working stability.

[0049] Please see Figure 5 The bottom of the push plate 5 is in contact with the bottom of the immersion chamber 4. A brush is fixedly installed on the top of the push plate 5, and the brush is in close contact with the lower surface of the return end of the belt 102. When the device is working, by fixing the brush on the top of the belt 102 and making the brush in contact with the lower surface of the return end of the belt 102, the brush can be driven to wash the lower surface of the return end of the belt 102 immersed in water during the left and right movement of the belt 102, which further improves the comprehensiveness of cleaning the lower surface of the return end of the belt 102.

[0050] Please see Figure 5 and Figure 9A traction roller 505 is longitudinally rotatably installed inside the immersion chamber 4 between the guide roller 401 and the take-up roller 503 on the same side. The traction roller 505 is located below the lower surface of the return end of the belt 102. The pull rope 504 is movably inserted under the traction roller 505. When the device is working, the pull rope 504 is guided by the traction roller 505, which can prevent the pull rope 504 from contacting the sinking surface of the belt 102, thereby avoiding abnormal wear of the belt 102 due to contact with the pull rope 504 during its movement.

[0051] This embodiment 2 references embodiment 1, and the differences are formed based on embodiment 1. Only the differences are explained here.

[0052] Example 3:

[0053] This invention provides a three-stage scraping device for a mining belt conveyor. Please refer to [link / reference]. Figure 1 - Figure 10 The bottom of the square tube 301 is fixedly connected to a filter box 6 located directly below the receiving hopper 3, and a filter element 601 is movably inserted into the filter box 6. The conveyor belt 303 is configured as a filter screen structure. A water pump b602 and a water storage tank 603 are fixedly installed below the frame 1. The inlet of the water pump b602 is fixedly connected to the bottom of the filter box 6, and the outlet of the water pump b602 is fixedly connected to the upper interior of the water storage tank 603. When the device is working, the wastewater generated by the flushing carries the washed-down material from top to bottom. Because the conveyor belt 303 is a filter screen structure, solid material remains on the conveyor belt 303 during the process and is conveyed outward. The wastewater generated after rinsing enters the filter box 6 and is filtered by the filter element 601 to remove fine residues. The wastewater is temporarily stored at the bottom of the filter box 6. After the water pump b602 is powered on and started, the filtered water temporarily stored at the bottom of the filter box 6 is pumped to the water storage tank 603 for later use, thus avoiding waste and environmental pollution caused by direct discharge of wastewater. This application sets the conveyor belt 303 as a filter screen structure, which can separate the materials and wastewater that fall off after rinsing. The filter box 6, which has the filter element 601 inserted inside, is connected to the bottom of the square tube 301, which can realize the filtration and collection of wastewater, which helps to avoid waste and pollution of water resources.

[0054] Please see Figure 1 and Figure 2A three-way pipe is fixedly connected to the inlet of the water pump a202, and the other two ends of the three-way pipe are respectively connected to the clean water source and the bottom of the water storage tank 603. When the device is working, by connecting the three-way pipe to the inlet of the water pump a202 and connecting one end of the three-way pipe to the bottom of the water storage tank 603, the filtered water collected inside the water storage tank 603 can be pumped back for reuse during the start-up process of the water pump a202. This is conducive to the reuse of water resources and improves the energy saving and environmental protection of the device to a certain extent.

[0055] A liquid level sensor a is fixedly installed on the inner wall of the filter box 6, located below the filter element 601. A liquid level sensor b is fixedly installed on the inner wall of the water storage tank 603. A solenoid valve a is installed in the end of the three-way pipe that connects to the clean water source, and a solenoid valve b is installed in the end of the three-way pipe that connects to the bottom of the water storage tank 603. When the device is working, the liquid level sensor a installed in the filter box 6 can detect the amount of filtered water collected at the bottom of the filter box 6, so that the water pump b602 can be started in time to pump the filtered water collected in the filter box 6 to the water storage tank 603, so as to prevent the filtered water in the filter box 6 from accumulating too much and overflowing from the joint between the filter element 601 and the filter box 6.

[0056] During operation, solenoid valve a is closed and solenoid valve b is open. Water pump a202 prioritizes the use of filtered water stored in water tank 603. When level sensor b detects that the amount of filtered water in water tank 603 is too low, it actively closes solenoid valve b and opens solenoid valve a under the control of the electrical control box, supplying water through the clean water source. When level sensor b detects that there is enough filtered water in water tank 603, it opens solenoid valve b again and closes solenoid valve a to use the filtered water. The above operation is repeated to operate the water. This application installs level sensor b inside water tank 603 and installs solenoid valves a and b at the two ends of the three-way pipe to control the use of clean water source and filtered water, so that the device prioritizes the use of filtered water, realizes the rational use of water flow, and further improves the water-saving performance of the device.

[0057] This embodiment 3 references embodiment 1, and establishes differences based on embodiment 1. Only the differences are explained here.

[0058] The above are merely the best implementation methods adopted in this application in light of current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A three-stage scraping device for a mining belt conveyor, comprising a frame (1), wherein symmetrically arranged conveyor rollers (101) are rotatably mounted on the left and right ends of the frame (1), a belt (102) is driven between the two conveyor rollers (101), an electrical control box is installed below the frame (1), and a sensor for detecting material at the return end of the belt (102) is installed on the frame (1), characterized in that, A three-stage scraping component located in the return direction of the belt (102) is fixedly installed at the bottom of the frame (1). The three-stage scraping component includes a spray pipe (2) and a fixing plate (203) longitudinally installed below the lower surface of the return end of the belt (102). A plurality of nozzles (201) facing the belt (102) are uniformly and fixedly connected to the spray pipe (2). A water pump a (202) is fixedly installed below the frame (1), and the water inlet of the water pump a (202) is externally connected to a cleaning water source. The water outlet of the water pump a (202) is internally connected to the spray pipe (2). The fixing plate (203) is arranged in a downward-sloping structure. A rubber scraping plate (204) closely fitted to the lower surface of the return end of the belt (102) is fixedly installed at the upper end of the fixing plate (203). The interior of the fixing plate (203) is of a hollow structure. A plurality of air knife blowing ports (205) connected to the hollow structure are uniformly opened on the end wall of the fixing plate (203) on the side away from the spray pipe (2). The hollow structure inside the fixing plate (203) is externally connected to an air pump; A receiving hopper (3) fixedly installed at the bottom of the frame (1) is sleeved outside the lower part of the three-stage scraping component. The outer shape of the receiving hopper (3) is of a funnel-shaped structure. A square pipe (301) is fixedly connected to the bottom of the receiving hopper (3). Two symmetrically arranged roller columns (302) are rotatably connected inside the square pipe (301). A conveyor belt (303) is movably sleeved between the two roller columns (302). The roller columns (302) are externally connected to a servo motor; A receiving hopper (3) fixedly installed at the bottom of the frame (1) is sleeved outside the spray pipe (2). Four longitudinally arranged guiding rollers (401) are rotatably connected inside the receiving hopper (3). The return end of the belt (102) is movably inserted between the four guiding rollers (401) and forms an inverted "ji" character structure after being guided by them. There are two spray pipes (2) in total, and the two spray pipes (2) are respectively arranged on the left and right sides inside the immersion bin (4); The left and right side walls of the immersion bin (4) are arranged in an outward-sloping structure. The connection between the left and right side walls of the immersion bin (4) and its bottom wall is of a circular arc transition structure. A push plate (5) perpendicular to its bottom is slidably installed inside the immersion bin (4). Two longitudinally arranged winding rollers (503) are rotatably installed on the left and right sides inside the immersion bin (4). The winding rollers (503) are externally connected to a servo motor. A pulling rope (504) is wound and connected to the two winding rollers (503) together. The middle position of the pulling rope (504) is fixedly connected to the top of the push plate (5); The bottom of the push plate (5) is in contact with the bottom of the immersion bin (4). A brush is fixedly installed at the top of the push plate (5), and the brush is closely fitted to the lower surface of the return end of the belt (102). The push plate (5) pushes the accumulated materials in the immersion bin (4) out.

2. The three-stage scraping device for a mining belt conveyor according to claim 1, characterized in that, The nozzle (201) faces the vertical surface of the belt (102) in its corresponding direction.

3. The three-stage scraping device for a mining belt conveyor according to claim 1, characterized in that, The front and rear end walls of the immersion chamber (4) are fixedly installed with guide rails (501) that are compatible with the movement trajectory of the push plate (5). Rollers (502) that are symmetrically clamped on the upper and lower sides of the guide rails (501) are rotatably connected to the front and rear end walls of the immersion chamber (4).

4. The three-stage scraping device for a mining belt conveyor according to claim 3, characterized in that, A traction roller (505) is longitudinally rotatably installed inside the immersion tank (4) between the guide roller (401) and the take-up roller (503) on the same side, and the traction roller (505) is located below the lower surface of the return end of the belt (102), and the pull rope (504) is movably inserted under the traction roller (505).

5. A three-stage scraping device for a mining belt conveyor according to claim 1, characterized in that, The bottom of the square tube (301) is fixedly connected to a filter box (6) located directly below the receiving hopper (3), and a filter element (601) is movably inserted into the filter box (6). The conveyor belt (303) is configured as a filter screen structure. A water pump b (602) and a water storage tank (603) are fixedly installed below the frame (1). The inlet of the water pump b (602) is fixedly connected to the bottom of the filter box (6), and the outlet of the water pump b (602) is fixedly connected to the upper part of the interior of the water storage tank (603).

6. A three-stage scraping device for a mining belt conveyor according to claim 5, characterized in that, A three-way pipe is fixedly connected to the inlet of the water pump a (202), and the other two ends of the three-way pipe are respectively connected to the clean water source and the bottom of the water storage tank (603).

7. A three-stage scraping device for a mining belt conveyor according to claim 6, characterized in that, A liquid level sensor a is fixedly installed on the inner end wall of the filter box (6) below the filter element (601), a liquid level sensor b is fixedly installed on the inner end wall of the water storage tank (603), a solenoid valve a is installed in the end of the three-way pipe that connects to the clean water source, and a solenoid valve b is installed in the end of the three-way pipe that connects to the bottom of the water storage tank (603).

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