A kind of thin coal seam mining with advancing arm in underground coal mine

Abstract

This invention relates to the field of coal mining equipment technology, specifically to a propulsion arm for mining thin coal seams underground. The propulsion arm includes a traveling unit and a mining unit. The mining unit is fixedly mounted on the traveling unit. The traveling unit includes a traveling shell, a traveling system, a collection box, and a pushing frame. The mining unit includes a rotating frame, a reversing frame, a sprocket-type support arm, a fine-tuning frame, and a mining head. This invention, through the cooperation of the traveling unit and the mining unit, reduces the working space required for the propulsion arm and the required dimensions of the initial excavation track, thereby reducing the difficulty of initial excavation, shortening the excavation time, and accelerating mining efficiency. The mining unit cleans coal lumps adhering to the surface of the mining tools during the mining process, ensuring smooth mining and preventing a decrease in the quality of the mining tools.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment technology, specifically to a propulsion arm for mining thin coal seams underground. Background Technology

[0002] Although the demand for coal has decreased somewhat due to social development, the deepening of environmental protection concepts, and the continuous development of new energy sources, it remains irreplaceable in the energy mix because its price is lower than that of new energy sources and its conversion and utilization are relatively simple.

[0003] Thin coal seams underground are difficult to mine using traditional mining equipment. Therefore, specialized mining equipment is generally used. Tracks are installed underground for the mining equipment to move and contact the thin coal seam for mining. However, since the depth of the thin coal seam is uncertain, the mining tools on the mining equipment need to be deformed to make contact with the thin coal seam. As a result, the mining track is relatively large to accommodate the deformable mining equipment. The larger mining track requires more time for excavation and is more difficult to excavate, resulting in lower mining efficiency. During the mining process, some coal chunks adhere to the surface of the mining tools, affecting the mining quality and easily interfering with the normal use of the mining tools. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a propulsion arm for mining thin coal seams underground.

[0005] A propulsion arm for mining thin coal seams underground includes a traveling unit and a mining unit, wherein the mining unit is fixedly installed on the traveling unit.

[0006] The walking unit includes a walking shell, a walking system is fixedly installed inside the walking shell, and collection boxes are fixedly installed symmetrically on the left and right sides of the walking shell. Each collection box has a pusher fixedly installed at the end away from the walking shell.

[0007] The mining unit includes a rotating frame. The rotating frame is fixedly installed on the upper end of the walking shell. A reversing frame is fixedly installed on the upper end of the rotating frame. A sprocket-type support arm is provided on the reversing frame. A fine-tuning frame is provided at the end of the sprocket-type support arm. A mining head is fixedly installed at the end of the fine-tuning frame. A mechanical feeder is fixedly installed at the lower end of the mining head. A telescopic conveying pipe is fixedly installed at the end of the mechanical feeder. The end of the conveying pipe is fixedly connected to a collection box.

[0008] Preferred technical solution 1: The collection box includes a box body, with the box body symmetrically and fixedly installed on the left and right sides of the outer shell. A pyramidal groove is opened inside the box body. A discharge pipe is fixedly installed at the lower end of the box body. A threaded sleeve is rotatably connected to the outer end of the discharge pipe. A threaded groove is opened at the inner end of the threaded sleeve.

[0009] Preferred technical solution 2: The pusher includes an inclined plate, and an inclined plate is fixedly installed on the end of the collection box away from the walking shell. An inclined abutment is fixedly installed on the lower end of the inclined plate, and a mating groove is opened on the lower end of the inclined abutment. A ceramic block is fixedly installed on the lower end of the inclined abutment.

[0010] Preferred technical solution 3: The rotating frame includes a fixed base. The fixed base is fixedly installed on the upper end of the walking shell. A motor is fixedly installed on the upper end of the fixed base through a motor base. A bevel gear is fixedly installed on the output shaft of the motor through a coupling. A T-shaped rotating column is rotatably connected to the upper end of the fixed base. An annular groove is opened at the lower end of the T-shaped rotating column. Conical tooth grooves are evenly opened in the annular grooves, and the conical tooth grooves cooperate with the bevel gear.

[0011] Preferred technical solution four: The reversing frame includes a telescopic frame in the shape of a zigzag. The telescopic frame in the shape of a zigzag is fixedly installed on the upper end of the rotating frame. A cylindrical gear is rotatably connected to the front side of the telescopic frame in the shape of a zigzag. A motor is fixedly installed on the telescopic frame in the shape of a zigzag through a motor base. The output shaft of the motor is fixedly connected to the cylindrical gear in the shape of a zigzag through a coupling. A corner limiting plate is fixedly installed on the rear side of the telescopic frame in the shape of a zigzag. The inner wall of the telescopic frame in the shape of a zigzag is smooth. The corner limiting plate is connected to the sprocket-type support arm in a sliding fit.

[0012] Preferred technical solution five: The sprocket-type support arm is composed of multiple fan-shaped protrusions connected in rotation. A toothed block is fixedly installed at the front end of the fan-shaped protrusion. A fan-shaped mating groove is opened inside the fan-shaped protrusion. An electromagnetic block is fixedly installed at one end of the fan-shaped mating groove near the adjacent fan-shaped protrusion. The fan-shaped protrusion has magnetic attraction.

[0013] Preferred technical solution six: The fine-tuning frame includes a screw, and the end of the sprocket-type support arm is rotatably connected to the screw. A second motor is fixedly installed inside the sprocket-type support arm through a motor base. The output shaft of the second motor is fixedly connected to the screw through a coupling. A C-shaped moving plate is connected to the screw by a threaded connection. A mining head is fixedly installed on the C-shaped moving plate. Guide rods that penetrate the C-shaped moving plate are evenly fixedly installed on one end of the sprocket-type support arm near the C-shaped moving plate.

[0014] Preferred technical solution seven: The mining head includes a cylindrical shell, and the cylindrical shell is fixedly installed at the end of the fine adjustment frame. A motor three is fixedly installed inside the cylindrical shell through a motor base. A reducer is fixedly installed on the output shaft of the motor three through a coupling. A rotating circular plate is fixedly installed at the front end of the reducer. A spiral toothed cutter is evenly fixedly installed on the outer end of the rotating circular plate. Cutting teeth are evenly fixedly installed on the spiral toothed cutter.

[0015] The present invention has the following beneficial effects: 1. The present invention provides a propulsion arm for mining thin coal seams in underground coal mines. By cooperating with the mining unit, the working space required for the propulsion arm is reduced, and the size required for the initial excavation track is reduced, thereby reducing the difficulty of the initial excavation, shortening the time required for excavation, and accelerating the mining efficiency. The mining unit cleans the coal blocks attached to the surface of the mining tools during the mining process, thereby ensuring the smooth progress of mining and preventing the mining quality of the mining tools from being reduced.

[0016] 2. The walking unit of this invention uses an inclined abutment plate and a ceramic block to push the stones on the track. The ceramic block has high hardness and is not easily worn.

[0017] 3. The mining unit set up in this invention uses a motor to drive a bevel gear to rotate, which in turn cooperates with the conical tooth groove to drive the T-shaped rotating column to rotate. This makes it easy to control the driving angle. During operation, the bevel gear is damaged first, not the motor, so as to reduce the replacement cost and difficulty.

[0018] 4. The mining unit of this invention is designed to ensure that its length can be changed by rotating the fan-shaped protrusions. The toothed block cooperates with the cylindrical gear. As the cylindrical gear rotates, the sprocket support arm moves. After the movement is completed, the electromagnetic block is energized to fix the fan-shaped protrusions together. Attached Figure Description

[0019] Figure 1 This is a front-view stereoscopic structural diagram of the present invention.

[0020] Figure 2 This is a rear-view stereoscopic structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the front view of the present invention.

[0022] Figure 4 For the present invention Figure 3 A sectional view along the AA direction.

[0023] Figure 5 For the present invention Figure 3 A sectional view along the BB direction.

[0024] Figure 6 This is a schematic diagram of the front cross-sectional structure of the present invention.

[0025] Figure 7 For the present invention Figure 6 A magnified view of a portion at point N.

[0026] In the diagram: 1. Walking unit; 11. Walking shell; 12. Walking system; 13. Collection box; 131. Box body; 132. Pyramidal groove; 133. Discharge pipe; 134. Threaded sleeve; 14. Pusher; 141. Inclined plate; 142. Inclined abutment plate; 143. Fitting groove; 144. Ceramic block; 2. Mining unit; 21. Rotating frame; 212. Fixed base; 211. Motor 1; 213. Bevel gear 1; 214. T-shaped rotating column; 215. Annular groove; 216. Conical toothed groove; 22. Reversing frame; 221. T-shaped extendable... 222. Shrink frame; 223. Cylindrical gear one; 224. Motor four; 225. Corner limiting plate; 23. Sprocket support arm; 231. Fan-shaped protrusion block; 232. Tooth block; 233. Fan-shaped mating groove; 234. Electromagnetic block; 24. Fine adjustment frame; 241. Screw; 242. Motor two; 243. C-shaped moving plate; 244. Guide rod; 25. Mining head; 26. Mechanical feeder; 27. Conveying pipe; 251. Cylindrical outer shell; 252. Motor three; 253. Reducer; 254. Rotating circular plate; 255. Spiral toothed cutter; 256. Cutting tooth. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See Figure 1 A propulsion arm for mining thin coal seams underground includes a traveling unit 1 and a mining unit 2, wherein the mining unit 2 is fixedly installed on the traveling unit 1.

[0029] See Figure 1 and Figure 2 The walking unit 1 includes a walking shell 11, a walking system 12 is fixedly installed inside the walking shell 11, and collection boxes 13 are fixedly installed symmetrically on the left and right sides of the walking shell 11. A pusher 14 is fixedly installed on the end of the collection box 13 away from the walking shell 11. First, the walking system 12 is brought into contact with the track in the mine. The walking system 12 moves on the track. The pusher 14 pushes the stones on the track to prevent them from affecting the movement of the walking system 12. The collection box 13 is then connected to the conveying channel.

[0030] Continue reading Figure 1 and Figure 2The mining unit 2 includes a rotating frame 21. The rotating frame 21 is fixedly installed on the upper end of the walking shell 11. A reversing frame 22 is fixedly installed on the upper end of the rotating frame 21. A sprocket-type support arm 23 is provided on the reversing frame 22. A fine-tuning frame 24 is provided at the end of the sprocket-type support arm 23. A mining head 25 is fixedly installed at the end of the fine-tuning frame 24. A mechanical feeder 26 is fixedly installed at the lower end of the mining head 25. A retractable conveying pipe 27 is fixedly installed at the end of the mechanical feeder 26. The end of the conveying pipe 27 is connected to the collection box 1. 3. Fixed connection; the position and direction of the reversing frame 22 are controlled by the rotating frame 21, and the extension direction of the sprocket support arm 23 is controlled by the reversing frame 22, thereby controlling the approximate position of the mining head 25. The specific position of the mining head 25 is adjusted by the fine-tuning frame 24. The mining head 25 is used to mine the coal. The coal blocks attached to the mining head 25 during the mining process are sucked into the collection box 13 by the mechanical feeder 26 and the conveying pipe 27 for collection, so as to prevent the coal blocks from affecting the mining effect of the mining head 25.

[0031] See Figure 3 and Figure 6 The collection box 13 includes a box body 131. The box body 131 is symmetrically and fixedly installed on the left and right sides of the walking shell 11. The box body 131 has a pyramidal groove 132 inside. The discharge pipe 133 is fixedly installed at the lower end of the box body 131. The outer end of the discharge pipe 133 is rotatably connected to a threaded sleeve 134. The inner end of the threaded sleeve 134 has a threaded groove. The threaded sleeve 134 facilitates the connection between the discharge pipe 133 and the conveying channel, so that the coal blocks in the box body 131 can be conveyed to the coal block accumulation area.

[0032] See Figure 1 and Figure 6 The pusher 14 includes an inclined plate 141. An inclined plate 141 is fixedly installed on the end of the collection box 13 away from the walking shell 11. An inclined abutment 142 is fixedly installed on the lower end of the inclined plate 141. A mating groove 143 is opened on the lower end of the inclined abutment 142. A ceramic block 144 is fixedly installed on the lower end of the inclined abutment 142. The mating groove 143 is matched with the track. The ceramic block 144 has a large hardness and is not easy to wear. The stones on the track are pushed by the cooperation between the inclined abutment 142 and the ceramic block 144.

[0033] See Figure 3 , Figure 6 and Figure 7The rotating frame 21 includes a fixed base 212. The fixed base 212 is fixedly installed on the upper end of the traveling shell 11. A motor 211 is fixedly installed on the upper end of the fixed base 212 via a motor mount. A bevel gear 213 is fixedly installed on the output shaft of the motor 211 via a coupling. A T-shaped rotating column 214 is rotatably connected to the upper end of the fixed base 212. An annular groove 215 is opened at the lower end of the T-shaped rotating column 214. Conical toothed grooves 216 are evenly opened in the annular groove 215. The conical toothed grooves 216 cooperate with the bevel gear 213. The motor 211 drives the bevel gear 213 to rotate, thereby cooperating with the conical toothed grooves 216 and driving the T-shaped rotating column 214 to rotate. Since the weight of the mining head 25 and the sprocket-type support arm 23 is relatively large... Because of its large size, if the sprocket support arm 23 is driven directly by motor 211, the driving angle is difficult to control, and the high driving speed can easily damage motor 211, thus increasing the replacement cost and difficulty. Therefore, using bevel gear 213 to drive the sprocket support arm 23 can more accurately control the movement and displacement of the sprocket support arm 23, so as to accurately control the contact between the mining head 25 and the thin coal seam. It is also convenient to quickly stop the sprocket support arm 23 after the mining head 25 has finished mining the coal mine in that area, so as to prevent the mining head 25 from digging into non-coal mines and causing damage to the mining head 25. When the mining head 25 comes into contact with hard rocks in the coal mine and gets stuck and cannot rotate, the bevel gear 213 driven by motor 211 will be damaged first, thereby reducing equipment maintenance costs.

[0034] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The reversing frame 22 includes a U-shaped telescopic frame 221. The U-shaped telescopic frame 221 is fixedly installed on the upper end of the rotating frame 21. A cylindrical gear 222 is rotatably connected to the front side of the U-shaped telescopic frame 221. A motor 223 is fixedly installed on the U-shaped telescopic frame 221 via a motor mount. The output shaft of the motor 223 is fixedly connected to the cylindrical gear 222 via a coupling. A bend limit plate 224 is fixedly installed on the rear side of the U-shaped telescopic frame 221. The inner wall of the U-shaped telescopic frame 221 is smooth. The bend limit plate 224 is connected to the sprocket support arm 23 in a sliding fit. The motor 223 drives the cylindrical gear 222 to rotate, thereby driving the sprocket support arm 23 to move, so that the position of the mining head 25 moves, ensuring that the mining head 25 contacts the thin coal seam for mining.

[0035] See Figure 4The sprocket-type support arm 23 is composed of multiple fan-shaped protrusions 231 rotatably connected. A toothed block 232 is fixedly installed at the front end of the fan-shaped protrusion 231. A fan-shaped mating groove 233 is opened inside the fan-shaped protrusion 231. An electromagnetic block 234 is fixedly installed at one end of the fan-shaped mating groove 233 near the adjacent fan-shaped protrusion 231. The fan-shaped protrusion 231 has magnetic attraction. The fan-shaped protrusions 231 are rotatably connected to ensure that their length can be changed. The toothed block 232 cooperates with the cylindrical gear 222. As the cylindrical gear 222 rotates, the sprocket-type support arm 23 moves. After the movement is completed, the electromagnetic block 234 is energized to fix the fan-shaped protrusions 231 together.

[0036] Continue reading Figure 4 The fine-tuning frame 24 includes a screw 241. The screw 241 is rotatably connected to the end of a sprocket-type support arm 23. A second motor 242 is fixedly installed inside the sprocket-type support arm 23 via a motor base. The output shaft of the second motor 242 is fixedly connected to the screw 241 via a coupling. A C-shaped moving plate 243 is connected to the screw 241 by a threaded connection. A mining head 25 is fixedly installed on the C-shaped moving plate 243. Guide rods 244 that penetrate the C-shaped moving plate 243 are evenly fixedly installed at one end of the sprocket-type support arm 23 near the C-shaped moving plate 243. The second motor 242 drives the screw 241 to rotate, thereby controlling the position of the C-shaped moving plate 243 to control the position of the mining head 25. The guide rods 244 guide the C-shaped moving plate 243.

[0037] See again Figure 4 The mining head 25 includes a cylindrical outer shell 251. The cylindrical outer shell 251 is fixedly installed at the end of the fine-tuning frame 24. A motor 252 is fixedly installed inside the cylindrical outer shell 251 via a motor mount. A reducer 253 is fixedly installed on the output shaft of the motor 252 via a coupling. A rotating circular plate 254 is fixedly installed at the front end of the reducer 253. Spiral toothed cutters 255 are evenly fixedly installed on the outer end of the rotating circular plate 254. Cutting teeth 256 are evenly fixedly installed on the spiral toothed cutters 255. The rotating circular plate 254 is driven to rotate by the motor 252, thereby driving the spiral toothed cutters 255 and the cutting teeth 256 to crush and mine the thin coal seam. The output torque is increased by the reducer 253.

[0038] In actual operation, the walking system 12 is first brought into contact with the track in the mine. The walking system 12 moves on the track. The pusher 14 pushes the stones on the track to prevent them from affecting the movement of the walking system 12. The position and direction of the reversing frame 22 are controlled by the rotating frame 21. The extension direction of the sprocket support arm 23 is controlled by the reversing frame 22, thereby controlling the approximate position of the mining head 25. The specific position of the mining head 25 is adjusted by the fine-tuning frame 24. The mining head 25 is used to mine the coal. The coal blocks attached to the mining head 25 during the mining process are sucked into the collection box 13 by the mechanical feeder 26 and the conveying pipe 27 for collection, so as to prevent the coal blocks from affecting the mining effect of the mining head 25.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A propulsion arm for mining thin coal seams underground, comprising a traveling unit (1) and a mining unit (2), characterized in that: The walking unit (1) is fixedly equipped with a mining unit (2); wherein: The walking unit (1) includes a walking shell (11), a walking system (12) is fixedly installed inside the walking shell (11), and collection boxes (13) are fixedly installed symmetrically on the left and right sides of the walking shell (11). A pusher (14) is fixedly installed on the end of the collection box (13) away from the walking shell (11). The mining unit (2) includes a rotating frame (21). The rotating frame (21) is fixedly installed on the upper end of the walking shell (11). A reversing frame (22) is fixedly installed on the upper end of the rotating frame (21). A sprocket-type support arm (23) is provided on the reversing frame (22). A fine-tuning frame (24) is provided at the end of the sprocket-type support arm (23). A mining head (25) is fixedly installed at the end of the fine-tuning frame (24). A mechanical feeder (26) is fixedly installed at the lower end of the mining head (25). A telescopic conveying pipe (27) is fixedly installed at the end of the mechanical feeder (26). The end of the conveying pipe (27) is fixedly connected to the collection box (13). The reversing frame (22) includes a telescopic frame (221) in the shape of a scissor. The telescopic frame (221) in the shape of a scissor is fixedly installed on the upper end of the rotating frame (21). A cylindrical gear (222) is rotatably connected to the front side of the telescopic frame (221). A motor (223) is fixedly installed on the telescopic frame (221) through a motor base. The output shaft of the motor (223) is fixedly connected to the cylindrical gear (222) through a coupling. A corner limiting plate (224) is fixedly installed on the rear side of the telescopic frame (221). The inner wall of the telescopic frame (221) is smooth. The corner limiting plate (224) is connected to the sprocket support arm (23) in a sliding fit. The sprocket-type support arm (23) is composed of multiple fan-shaped protrusions (231) connected in rotation. A toothed block (232) is fixedly installed at the front end of the fan-shaped protrusion (231). A fan-shaped mating groove (233) is opened inside the fan-shaped protrusion (231). An electromagnetic block (234) is fixedly installed at one end of the fan-shaped mating groove (233) near the adjacent fan-shaped protrusion (231). The fan-shaped protrusion (231) has magnetic attraction.

2. The propulsion arm for mining thin coal seams underground according to claim 1, characterized in that: The collection box (13) includes a box body (131), and the box body (131) is symmetrically fixedly installed on the left and right sides of the outer shell (11). The box body (131) has a pyramidal groove (132) inside. The discharge pipe (133) is fixedly installed at the lower end of the box body (131). The outer end of the discharge pipe (133) is rotatably connected to a threaded sleeve (134), and the inner end of the threaded sleeve (134) has a threaded groove.

3. The propulsion arm for mining thin coal seams underground according to claim 1, characterized in that: The pusher (14) includes an inclined plate (141). An inclined plate (141) is fixedly installed at the end of the collection box (13) away from the walking shell (11). An inclined abutment plate (142) is fixedly installed at the lower end of the inclined plate (141). A mating groove (143) is opened at the lower end of the inclined abutment plate (142). A ceramic block (144) is fixedly installed at the lower end of the inclined abutment plate (142).

4. A propulsion arm for mining thin coal seams underground according to claim 1, characterized in that: The rotating frame (21) includes a fixed base (212). The fixed base (212) is fixedly installed on the upper end of the walking shell (11). A motor (211) is fixedly installed on the upper end of the fixed base (212) through a motor seat. A bevel gear (213) is fixedly installed on the output shaft of the motor (211) through a coupling. A T-shaped rotating column (214) is rotatably connected to the upper end of the fixed base (212). An annular groove (215) is opened at the lower end of the T-shaped rotating column (214). Conical tooth grooves (216) are evenly opened in the annular groove (215). The conical tooth grooves (216) cooperate with the bevel gear (213).

5. A propulsion arm for mining thin coal seams underground according to claim 1, characterized in that: The fine-tuning frame (24) includes a screw (241), and the end of the sprocket support arm (23) is rotatably connected to the screw (241). A second motor (242) is fixedly installed inside the sprocket support arm (23) through a motor seat. The output shaft of the second motor (242) is fixedly connected to the screw (241) through a coupling. A C-shaped moving plate (243) is connected to the screw (241) by a threaded connection. A mining head (25) is fixedly installed on the C-shaped moving plate (243). Guide rods (244) that penetrate the C-shaped moving plate (243) are evenly fixedly installed on one end of the sprocket support arm (23) near the C-shaped moving plate (243).

6. A propulsion arm for mining thin coal seams underground according to claim 1, characterized in that: The mining head (25) includes a cylindrical shell (251), and the cylindrical shell (251) is fixedly installed at the end of the fine adjustment frame (24). A motor (252) is fixedly installed inside the cylindrical shell (251) through a motor base. A reducer (253) is fixedly installed on the output shaft of the motor (252) through a coupling. A rotating circular plate (254) is fixedly installed at the front end of the reducer (253). A spiral tooth cutter (255) is evenly fixedly installed on the outer end of the rotating circular plate (254). Cutting teeth (256) are evenly fixedly installed on the spiral tooth cutter (255).

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