Underground coal bunker with anti-blocking function

Abstract

The invention relates to the field of underground coal bunkers, in particular to an underground coal bunker with an anti-blocking function. According to the underground coal bunker with the anti-blocking function, coal can be crushed while the coal flows through air injection, blockage caused by coal caking is prevented, the risk of blockage is reduced, and the coal conveying efficiency is improved. An underground coal bunker with an anti-blocking function comprises a connecting frame, coal bunkers, a discharging frame, distributing hoppers and the like, the coal bunkers are connected to the left portion and the right portion of the connecting frame, the discharging frame is connected between the upper portions of the coal bunkers, and the left distributing hopper and the right distributing hopper are connected to the inner side of the middle of the discharging frame. According to the coal crushing device, gas enters the discharging frame, coal is blown by the gas to fall on a crushing roller, a rotating column is driven by a second motor to rotate reversely, and then the crushing roller is driven to rotate reversely to crush the coal, so that the coal is crushed while the coal flows through gas injection, and blockage caused by coal caking is prevented; the blocking risk is reduced, and the coal conveying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of underground coal bunkers, and in particular to an underground coal bunker with an anti-blocking function. Background Art

[0002] An underground coal bunker is one of the facilities used to store coal during the coal mining process. It is usually located inside a mine to facilitate the temporary storage and transportation of coal. The design and use of underground coal bunkers play an important role in improving coal mine production efficiency and ensuring safety. Underground coal bunkers are usually located close to the coal mining face to facilitate the rapid loading of coal.

[0003] The existing method of preventing underground coal bunkers from being blocked is usually to use air cannons to vibrate and inject compressed air into the blocked area in the coal bunker to loosen and flow the coal, thereby preventing the underground coal bunker from being blocked. However, this method can only make the coal flow but cannot directly crush the coal, which can easily cause the coal to fall, accumulate or clump, resulting in a high risk of blockage and affecting the efficiency of coal transportation.

[0004] Therefore, it is necessary to design an underground coal bunker with anti-blocking function that can crush the coal while jetting to make the coal flow, prevent coal agglomeration from causing blockage, reduce the risk of blockage, and improve the efficiency of coal transportation. Summary of the invention

[0005] In order to overcome the shortcomings of the current method of using air cannon vibration, which can only make the coal flow but cannot directly crush the coal, easily causing the coal to fall, accumulate or agglomerate, thereby resulting in a high risk of blockage and affecting the efficiency of coal transportation, the present invention provides an underground coal bunker with anti-blockage function that can crush the coal while jetting air to make the coal flow, prevent blockage caused by coal agglomeration, reduce the risk of blockage, and improve the efficiency of coal transportation.

[0006] The technical solution of the present invention is: an underground coal bunker with an anti-blocking function, including a connecting frame, a coal bunker, a feeding rack, a distribution hopper, an air jet mechanism and a crushing mechanism, the left and right parts of the connecting frame are connected to the coal bunker, the feeding rack is connected between the upper parts of the coal bunker, the left and right distribution hoppers are connected to the inner side of the middle part of the feeding rack, an air jet mechanism for coal flow is provided between the distribution hopper and the connecting frame, and a crushing mechanism for crushing coal is provided on the upper part of the feeding rack.

[0007] As an improvement of the above solution, the diameter of the upper part of the coal bunker is larger than the diameter of the lower part.

[0008] As an improvement of the above scheme, the jet mechanism includes a connecting piece, a connecting pipe, a jet pipe and a filter. A connecting pipe is connected to the middle of the unloading rack. The left and right parts of the connecting pipe are connected to connecting pieces. The inner sides of the left and right parts of the connecting pipe are connected to multiple jet pipes. The jet pipes are connected to adjacent material distribution hoppers, and the inner sides of the material distribution hoppers are connected to multiple filters. An external jet device is connected through the connecting piece, and the gas is blown into the connecting pipe by starting the jet device, so that the gas enters the jet pipe, and then flows through the filter into the unloading rack, so that the gas blows the coal and causes the coal to fall onto the unloading rack.

[0009] As an improvement on the above scheme, the crushing mechanism includes a second motor, a rotating column and a crushing roller. Two second motors are connected to the left side of the upper part of the lower material rack, and the upper part of the lower material rack is rotatably connected to the two second motors. The output shafts of the second motors pass through the lower material rack and are connected to the rotating columns on the same side. The rotating columns are connected to crushing rollers. When the coal falls on the crushing roller, the second motor is started, and the rotating column is driven by the second motor to rotate in the opposite direction, thereby driving the crushing roller to rotate in the opposite direction, thereby crushing the fallen coal.

[0010] As an improvement of the above scheme, it also includes a discharging mechanism, which includes a first motor, a first gear, a second gear and a spiral column. The outer side of the lower part of the coal bin is connected to the first motor, and the output shaft of the first motor passes through the coal bin on the same side and is connected to the first gear. The lower part of the coal bin is rotatably connected to the spiral column, and the outer side of the spiral column is connected to the second gear. The second gear is rotatably connected to the coal bin on the same side, and the second gear is meshed with the first gear on the same side. The first motor drives the first gear to rotate, and the first gear and the second gear mesh with each other, so that the spiral column rotates, and then the coal in the coal bin moves along the spiral column and is discharged.

[0011] As an improvement of the above scheme, it also includes a knocking mechanism, which includes an outer shell, an impeller, a connecting column, a cam, a fixed frame, a knocking column and a spring. The middle part of the connecting pipe is connected to the front and rear outer shells, and the outer shells are rotatably connected to connecting columns, the upper parts of the connecting columns are connected to impellers, and the lower parts of the connecting columns are connected to cams. The inner sides of the front and rear parts of the unloading rack are connected to the fixed frame, and the left and right parts of the fixed frame are slidably connected to knocking columns, and springs are connected between the knocking columns and the fixed frames on the same side; gas enters the outer shell, causing the impeller to rotate, thereby driving the connecting column to rotate, causing the cam to rotate, and then causing the cam to contact the knocking column, so that the knocking column moves along the fixed frame and contacts the distribution hopper, and the spring is squeezed, thereby knocking the distribution hopper.

[0012] As an improvement of the above scheme, a detection mechanism is also included, which includes a connecting bracket and a cover. The rear sides of the left and right parts of the unloading rack are connected to the connecting brackets, and the covers are rotatably connected to the connecting brackets, and the covers are in contact with the unloading rack.

[0013] As an improvement of the above solution, a handle is also included, and the outer side of the front part of the cover is connected to the handle.

[0014] As an improvement of the above scheme, a scraping mechanism is also included, which includes a fixed column and a scraper. The spiral column is connected to the fixed column, and multiple scrapers are connected to the fixed column. The scrapers are in contact and cooperate with the coal bin on the same side. When the spiral column rotates, the fixed column is also driven to rotate, and then the scraper is driven to rotate, so that the scraper scrapes off the sticky coal on the lower inner wall of the coal bin.

[0015] As an improvement of the above solution, the scrapers are all made of high manganese steel, which has good wear resistance and good impact toughness.

[0016] The present invention has the following advantages: 1. The present invention allows gas to enter the discharge rack, so that the gas blows the coal to fall on the crushing roller, and the second motor drives the rotating column to rotate in the opposite direction, thereby driving the crushing roller to rotate in the opposite direction to crush the coal, so that the coal can be crushed while the jet of gas makes the coal flow, preventing coal agglomeration from causing blockage, reducing the risk of blockage, and improving the efficiency of coal transportation.

[0017] 2. The present invention drives the first gear to rotate through the first motor, and the first gear and the second gear mesh with each other to rotate the spiral column, so that the coal in the coal bin moves along the spiral column and is discharged, so that the crushed coal can be output, ensuring that the coal can be discharged smoothly from the coal bin, reducing coal accumulation and agglomeration, and further avoiding blockage.

[0018] 3. In the present invention, gas will also enter the outer casing, causing the impeller to rotate, thereby driving the connecting column to rotate, causing the cam to rotate, and then causing the cam to contact the knocking column, causing the knocking column to move along the fixed frame and contact the distribution hopper, and the spring is squeezed, so that the distribution hopper can be knocked when unloading, preventing part of the coal from sticking to the distribution hopper and reducing the risk of blockage of the distribution hopper.

[0019] 4. The present invention pulls the lid by the handle so that the lid rotates along the connecting bracket to open, and then observes the condition of coal sticking to the inner wall of the material rack. When there is a lot of coal sticking to the inner wall of the material rack, it can be cleaned manually using a cleaning tool, so that the lid can be rotated to observe the internal condition of the material rack, which is convenient for cleaning the material rack.

[0020] 5. The present invention drives the fixed column to rotate while the spiral column rotates, and then drives the scraper to rotate, so that the scraper can scrape off the sticky coal at the bottom of the coal bunker, thereby scraping off the coal on the inner wall of the coal bunker during the feeding process, preventing the coal from sticking to the coal bunker and causing blockage of the discharge port, thereby reducing coal waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0023] Figure 3 It is a partial three-dimensional structural cross-sectional view of the present invention.

[0024] Figure 4 It is a three-dimensional structural cutaway diagram of the jet mechanism of the present invention.

[0025] Figure 5 It is a three-dimensional structural cutaway diagram of the jet mechanism of the present invention.

[0026] Figure 6 It is a three-dimensional structural cross-sectional view of the discharging mechanism of the present invention.

[0027] Figure 7 It is a three-dimensional structural cross-sectional view of the discharging mechanism of the present invention.

[0028] Figure 8 It is a three-dimensional structural cross-sectional diagram of the striking mechanism of the present invention.

[0029] Fig. 9 It is a three-dimensional structural cross-sectional diagram of the striking mechanism of the present invention.

[0030] Fig.10 It is a three-dimensional structural cross-sectional diagram of the crushing mechanism of the present invention.

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the detection mechanism of the present invention.

[0032] Fig.12 It is a cross-sectional view of the first stereoscopic structure of the scraping mechanism of the present invention.

[0033] Fig.13 It is a cross-sectional view of the second three-dimensional structure of the scraping mechanism of the present invention.

[0034] The reference numbers in the figure are as follows: 1: connecting frame, 2: coal bunker, 3: unloading frame, 30: dividing hopper, 4: jet mechanism, 40: connecting piece, 41: connecting pipe, 42: jet pipe, 43: filter screen, 5: discharging mechanism, 50: first motor, 51: first gear, 52: second gear, 53: spiral column, 6: knocking mechanism, 60: housing, 61: impeller, 62: connecting column, 63: cam, 64: fixed frame, 65: knocking column, 66: spring, 7: crushing mechanism, 70: second motor, 71: rotating column, 72: crushing roller, 8: detection mechanism, 80: connecting bracket, 81: cover, 82: handle, 9: scraping mechanism, 90: fixed column, 91: scraper. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0036] An underground coal bunker with anti-blocking function, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.10 As shown, it includes a connecting frame 1, a coal bunker 2, a material discharge rack 3, a distribution hopper 30, an air jet mechanism 4 and a crushing mechanism 7. The left and right parts of the connecting frame 1 are both connected to the coal bunker 2. The diameter of the upper part of the coal bunker 2 is larger than that of the lower part, which is convenient for material discharge. The upper part of the coal bunker 2 is connected with the material discharge rack 3, and the inner side of the middle part of the material discharge rack 3 is connected to the left and right distribution hoppers 30. A jet mechanism 4 for coal flow is provided between the distribution hopper 30 and the connecting frame 1, and a crushing mechanism 7 for crushing coal is provided on the upper part of the material discharge rack 3.

[0037] like Figure 1 , Figure 4 and Figure 5 As shown, the jet mechanism 4 includes a connecting piece 40, a connecting pipe 41, a jet pipe 42 and a filter screen 43. The middle part of the unloading rack 3 is connected to the connecting pipe 41, the left and right parts of the connecting pipe 41 are connected to the connecting piece 40, the inner sides of the left and right parts of the connecting pipe 41 are connected to four jet pipes 42, the jet pipes 42 are connected to the adjacent distribution hoppers 30, and the inner sides of the distribution hoppers 30 are connected to four filter screens 43.

[0038] like Figure 1 and Fig.10 As shown, the crushing mechanism 7 includes a second motor 70, a rotating column 71 and a crushing roller 72. The front and rear second motors 70 are connected to the left side of the upper part of the unloading frame 3. The front and rear rotating columns 71 are rotatably connected to the upper part of the unloading frame 3. The output shafts of the second motors 70 pass through the unloading frame 3 and are connected to the rotating columns 71 on the same side. The crushing rollers 72 are connected to the rotating columns 71.

[0039] When it is necessary to temporarily store and transport coal, the device can be used. The device is brought into the mine where it is needed, so that the connecting frame 1 is in contact with the ground, and the unloading frame 3 is in contact with the coal mining working surface. Then, the jet device is connected to the connecting piece 40, and the jet device is started to blow gas into the connecting pipe 41, so that the gas enters the jet pipe 42, and then flows through the filter screen 43 into the unloading frame 3, so that the gas blows the coal, so that the coal falls on the unloading frame 3, and the coal falls on the crushing roller 72, and the second motor 70 is started, and the second motor 70 drives the rotating column 71 to rotate in the opposite direction, thereby driving The crushing roller 72 rotates in the opposite direction to crush the fallen coal. The crushed coal falls into the distribution hopper 30 along the unloading rack 3. The diameter of the upper part of the coal bin 2 is larger than that of the lower part, which is convenient for unloading. The filter screen 43 prevents the coal from falling into the jet pipe 42, so that the crushed coal falls into the two coal bins 2 respectively, so that the coal can be crushed while the jet makes the coal flow, preventing coal agglomeration from causing blockage, reducing the risk of blockage, and improving the efficiency of coal transportation. After use, turn off the jet equipment and the second motor 70, then disconnect the jet equipment from the connecting piece 40, and remove the jet equipment.

[0040] like Figure 1 , Figure 6 and Figure 7 As shown, a discharging mechanism 5 is also included, and the discharging mechanism 5 includes a first motor 50, a first gear 51, a second gear 52 and a spiral column 53. The first motor 50 is connected to the outer side of the lower part of the coal bunker 2, and the output shaft of the first motor 50 passes through the coal bunker 2 on the same side and is connected to the first gear 51. The lower part of the coal bunker 2 is rotatably connected to the spiral column 53, and the outer side of the spiral column 53 is connected to the second gear 52. The second gear 52 is rotatably connected to the coal bunker 2 on the same side, and the second gear 52 is meshed with the first gear 51 on the same side.

[0041] After the crushed coal enters the coal bin 2, the first motor 50 is started, and the first motor 50 drives the first gear 51 to rotate. The first gear 51 and the second gear 52 mesh with each other, so that the spiral column 53 rotates, and then the coal in the coal bin 2 moves along the spiral column 53 and is discharged, so that the crushed coal can be output, ensuring that the coal can be smoothly discharged from the coal bin 2, reducing coal accumulation and agglomeration, and further avoiding blockage. After use, the first motor 50 can be turned off.

[0042] like Figure 8 and Fig. 9As shown, it also includes a knocking mechanism 6, which includes a shell 60, an impeller 61, a connecting column 62, a cam 63, a fixing frame 64, a knocking column 65 and a spring 66. The middle part of the connecting pipe 41 is connected to the front and rear shells 60, and the shells 60 are rotatably connected to the connecting columns 62. The upper parts of the connecting columns 62 are connected to the impeller 61, and the lower parts of the connecting columns 62 are connected to the cam 63. The inner sides of the front and rear parts of the unloading rack 3 are connected to the fixing frames 64, and the left and right parts of the fixing frames 64 are slidably connected to the knocking columns 65, and the knocking columns 65 are connected to the fixing frames 64 on the same side with springs 66.

[0043] When the air blowing device blows air and causes the gas to enter the connecting pipe 41, the gas will also enter the outer casing 60, causing the impeller 61 to rotate, thereby driving the connecting column 62 to rotate, causing the cam 63 to rotate, and then causing the cam 63 to contact the knocking column 65, causing the knocking column 65 to move along the fixed frame 64 and contact the distribution hopper 30, and the spring 66 is squeezed, so that the distribution hopper 30 can be knocked during material discharge, preventing part of the coal from sticking to the distribution hopper 30 and reducing the risk of blockage of the distribution hopper 30. When the cam 63 is disengaged from the knocking column 65, the spring 66 rebounds, and the knocking column 65 moves to reset.

[0044] like Figure 1 and Fig.11 As shown, a detection mechanism 8 is also included, and the detection mechanism 8 includes a connecting bracket 80, a cover 81 and a handle 82. The left and right rear sides of the unloading rack 3 are connected to the connecting bracket 80, and the connecting bracket 80 is rotatably connected to the cover 81. The cover 81 is in contact with the unloading rack 3, and the outer side of the front of the cover 81 is connected to the handle 82, which is convenient for hand-gripping and rotating to open the cover 81.

[0045] After the device has been used for a long time, the lid 81 can be pulled by the handle 82 so that the lid 81 can be rotated and opened along the connecting bracket 80, and then the condition of the coal sticking to the inner wall of the unloading rack 3 can be observed. When there is a lot of coal sticking to the inner wall of the unloading rack 3, it can be cleaned manually using a cleaning tool, so that the lid 81 can be rotated to observe the internal condition of the unloading rack 3, which is convenient for cleaning the unloading rack 3, and then the lid 81 can be rotated and closed by the handle 82.

[0046] like Fig.12 and Fig.13 As shown, a scraping mechanism 9 is also included, and the scraping mechanism 9 includes a fixed column 90 and a scraper 91. The spiral column 53 is connected to the fixed column 90, and three scrapers 91 are connected to the fixed column 90. The scrapers 91 are in contact with the coal bin 2 on the same side. The scrapers 91 are made of high manganese steel and have good wear resistance and good impact toughness.

[0047] When the spiral column 53 rotates, the fixed column 90 is also driven to rotate, and then the scraper 91 is driven to rotate, so that the scraper 91 scrapes off the sticky coal on the lower inner wall of the coal bunker 2. The scraper 91 is made of high manganese steel, which has good wear resistance and good impact toughness. Therefore, the coal on the inner wall of the coal bunker 2 can be scraped off during the feeding process, preventing the coal from sticking to the coal bunker 2 and causing the discharge port to be blocked, thereby reducing the waste of coal.

[0048] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods will fall within the protection scope of the embodiments of the present invention.

Claims

1. An underground coal bunker with anti-blocking function, It is characterized in that The invention comprises a connecting frame (1), a coal bunker (2), a material discharging frame (3), a material distribution hopper (30), an air jet mechanism (4) and a crushing mechanism (7). The left and right parts of the connecting frame (1) are both connected to the coal bunker (2). The upper part of the coal bunker (2) is connected to the material discharging frame (3). The inner side of the middle part of the material discharging frame (3) is connected to the left and right material distribution hoppers (30). An air jet mechanism (4) for coal flow is provided between the material distribution hopper (30) and the connecting frame (1). The upper part of the material discharging frame (3) is provided with a crushing mechanism (7) for crushing coal.

2. An underground coal bunker with anti-blocking function according to claim 1, It is characterized in that The diameter of the upper part of the coal bunker (2) is larger than that of the lower part.

3. An underground coal bunker with anti-blocking function according to claim 2, It is characterized in that The jet mechanism (4) comprises a connecting piece (40), a connecting pipe (41), a jet pipe (42) and a filter screen (43); the middle part of the material discharging rack (3) is connected with the connecting pipe (41); the left and right parts of the connecting pipe (41) are both connected with the connecting piece (40); the inner sides of the left and right parts of the connecting pipe (41) are both connected with a plurality of jet pipes (42); the jet pipes (42) are both connected with adjacent material discharging hoppers (30); the inner sides of the material discharging hoppers (30) are both connected with a plurality of filter screens (43); an external jet device is connected through the connecting piece (40); the gas is blown into the connecting pipe (41) by starting the jet device, so that the gas enters the jet pipe (42), and then flows through the filter screen (43) into the material discharging rack (3), so that the gas blows the coal, so that the coal falls onto the material discharging rack (3).

4. An underground coal bunker with anti-blocking function according to claim 3, It is characterized in that The crushing mechanism (7) comprises a second motor (70), a rotating column (71) and a crushing roller (72). The left side of the upper part of the unloading frame (3) is connected to two second motors (70) at the front and rear ends. The upper part of the unloading frame (3) is rotatably connected to two rotating columns (71) at the front and rear ends. The output shafts of the second motors (70) pass through the unloading frame (3) and are connected to the rotating columns (71) on the same side. The rotating columns (71) are connected to the crushing rollers (72). When the coal falls on the crushing rollers (72), the second motor (70) is started, and the rotating column (71) is driven by the second motor (70) to rotate in the opposite direction, thereby driving the crushing rollers (72) to rotate in the opposite direction, thereby crushing the fallen coal.

5. An underground coal bunker with anti-blocking function according to claim 4, It is characterized in that The invention also comprises a discharging mechanism (5), which comprises a first motor (50), a first gear (51), a second gear (52) and a spiral column (53). The lower outer side of the coal bunker (2) is connected to the first motor (50), the output shaft of the first motor (50) passes through the coal bunker (2) on the same side and is connected to the first gear (51), the lower part of the coal bunker (2) is rotatably connected to the spiral column (53), the outer side of the spiral column (53) is connected to the second gear (52), the second gear (52) is rotatably connected to the coal bunker (2) on the same side, and the second gear (52) is meshed with the first gear (51) on the same side; the first motor (50) drives the first gear (51) to rotate, the first gear (51) and the second gear (52) mesh with each other, so that the spiral column (53) rotates, and the coal in the coal bunker (2) moves along the spiral column (53) and is discharged.

6. An underground coal bunker with anti-blocking function according to claim 5, It is characterized in that The invention also comprises a knocking mechanism (6), which comprises a housing (60), an impeller (61), a connecting column (62), a cam (63), a fixing frame (64), a knocking column (65) and a spring (66). The middle part of the connecting pipe (41) is connected to the front and rear housings (60), the housings (60) are rotatably connected to the connecting columns (62), the upper part of the connecting columns (62) is connected to the impeller (61), the lower part of the connecting columns (62) is connected to the cam (63), and the inner sides of the front and rear parts of the unloading frame (3) are connected to the fixing frame (64). The left and right parts of the fixed frame (64) are both slidably connected with knocking columns (65), and the knocking columns (65) are connected to the fixed frame (64) on the same side with a spring (66); the gas enters the housing (60), causing the impeller (61) to rotate, thereby driving the connecting column (62) to rotate, causing the cam (63) to rotate, thereby causing the cam (63) to contact the knocking column (65), causing the knocking column (65) to move along the fixed frame (64) and contact the distribution hopper (30), and the spring (66) is squeezed, thereby knocking the distribution hopper (30).

7. An underground coal bunker with anti-blocking function according to claim 6, It is characterized in that The invention also comprises a detection mechanism (8), the detection mechanism (8) comprising a connecting bracket (80) and a cover (81), the left and right rear sides of the unloading rack (3) are both connected to the connecting bracket (80), the connecting bracket (80) is both rotatably connected to the cover (81), and the cover (81) is in contact with the unloading rack (3).

8. An underground coal bunker with anti-blocking function according to claim 7, It is characterized in that It also includes a handle (82), and the outer side of the front part of the cover (81) is connected to the handle (82).

9. An underground coal bunker with anti-blocking function according to claim 8, It is characterized in that The invention also comprises a scraping mechanism (9), the scraping mechanism (9) comprising a fixed column (90) and a scraper (91), the spiral column (53) is connected to the fixed column (90), the fixed column (90) is connected to a plurality of scrapers (91), the scrapers (91) are in contact with and cooperate with the coal bin (2) on the same side; when the spiral column (53) rotates, the fixed column (90) is also driven to rotate, thereby driving the scraper (91) to rotate, so that the scraper (91) scrapes off the sticky coal on the lower inner wall of the coal bin (2).

10. An underground coal bunker with anti-blocking function according to claim 9, It is characterized in that The scrapers (91) are all made of high manganese steel and have good wear resistance and good impact toughness.

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