Dust cleaning mechanism for closed belt conveyor

Abstract

The utility model relates to closed belt conveyor dust cleaning equipment technical field, concretely is a kind of dust cleaning mechanism for closed belt conveyor, and closed belt conveyor is rotatably provided with belt, dust cleaning mechanism includes fixed shaft and V-shaped sweeper, fixed shaft is adjustably arranged on the tail of closed belt conveyor and fixed shaft is located the return belt surface of belt above, and V-shaped sweeper is fixedly arranged on fixed shaft and the lower end of V-shaped sweeper is contacted with the return belt surface of belt.The dust cleaning mechanism for closed belt conveyor of the utility model realizes the material and dust accumulation on the return belt surface of belt to be scraped automatically, need not stop cleaning, so that closed belt conveyor can keep production continuity, reduce cleaning personnel configuration and work time input, can also keep belt clean and reduce operating resistance, save power consumption, simultaneously avoid causing dust explosion.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal equipment for sealed belt conveyors, and specifically to a dust removal mechanism for sealed belt conveyors. Background Technology

[0002] Enclosed belt conveyors evolved from traditional open belt conveyors and are primarily used to address dust pollution, material loss, and safety issues during material transport. With increasingly stringent global environmental regulations and rising demands for industrial automation, enclosed belt conveyors, due to their environmental friendliness, high efficiency, and safety, have gradually become the mainstream equipment for conveying bulk materials. However, the load-bearing surface of the belt in an enclosed belt conveyor is prone to allowing materials and dust to fall into the return surface (i.e., the non-load-bearing surface).

[0003] Therefore, after a period of operation, enclosed belt conveyors typically require periodic shutdowns for manual cleaning of accumulated dust and materials from the inspection port. However, frequent cleaning disrupts normal production. Furthermore, failure to periodically clean the dust accumulation at the belt tail could lead to dust explosions; the accumulated dust also increases belt resistance, resulting in higher energy consumption for the enclosed belt conveyor. Therefore, a dust removal mechanism for enclosed belt conveyors is urgently needed to solve these problems. Utility Model Content

[0004] To address the technical problems of closed belt conveyors requiring periodic shutdowns for manual cleaning of accumulated dust and materials from the inspection port, which disrupts normal production and poses a risk of dust explosions if dust accumulation at the belt tail is not cleaned regularly, and also increases belt running resistance, this invention provides a dust removal mechanism for closed belt conveyors. This mechanism automatically scrapes away materials and accumulated dust from the return belt surface without requiring shutdowns for cleaning. This allows closed belt conveyors to maintain continuous production, reduces the need for cleaning personnel and labor, keeps the belt clean, reduces running resistance, saves electricity, and prevents dust explosions.

[0005] This utility model provides a dust removal mechanism for a closed belt conveyor. The closed belt conveyor has a belt rotatably mounted on it. The dust removal mechanism includes a fixed shaft and a V-shaped cleaner. The fixed shaft is adjustablely mounted on the tail of the closed belt conveyor and is located above the return surface of the belt. The V-shaped cleaner is fixedly mounted on the fixed shaft and its lower end contacts the return surface of the belt.

[0006] Furthermore, the V-shaped sweeper includes a V-shaped blade holder and V-shaped blades. The two ends of the V-shaped blade holder are fixedly connected to a fixed shaft, and the V-shaped blades are fixedly connected to the outside of the V-shaped blade holder. The lower end of the V-shaped blades contacts the return surface of the belt. The scraped material and accumulated dust are driven by the V-shaped blades and move outwards from the center point of the V-shaped blades along both sides, eventually falling off the return surface of the belt.

[0007] Furthermore, the V-shaped tool holder is provided with multiple first screw holes, and the V-shaped blade is provided with multiple second screw holes. A first bolt passes through the first and second screw holes and is fixedly connected to a first nut. A washer is fixedly placed between the first bolt and the V-shaped blade. The V-shaped tool holder and the V-shaped blade are fixedly connected by the first bolt and the first nut. The washer facilitates the fixing of the V-shaped tool holder and the V-shaped blade, and protects the V-shaped blade from being crushed by the first bolt.

[0008] Furthermore, both ends of the V-shaped cutter holder are fixedly provided with horizontal plates. The two ends of the fixed shaft pass through and are fixedly connected to the two horizontal plates respectively. Limiting sleeves are fixedly provided at both ends of the fixed shaft, with the two limiting sleeves located outside the two horizontal plates. Two slotted holes are provided on the tail of the sealed belt conveyor. The two limiting sleeves pass through the two slotted holes respectively and are fixedly connected to the tail of the sealed belt conveyor through adjusting nuts. The V-shaped cutter holder is fixed to the fixed shaft through the two horizontal plates. The fixed shaft is locked at different height positions at the tail of the sealed belt conveyor through the slotted holes and adjusting nuts, thereby adapting to the belt tension and ensuring that after the fixed shaft position is fixed, the lower end of the V-shaped cleaner always contacts the return surface of the belt.

[0009] Furthermore, it also includes a receiving pipe, a return pipe, and a scraper conveyor fixedly installed at the tail of the enclosed belt conveyor. The receiving pipe is located below the bearing surface of the belt and is fixedly connected to and communicates with the bottom of the scraper conveyor. The V-shaped cleaner is located above the receiving pipe. The return pipe is located above the bearing surface of the belt and is fixedly connected to and communicates with the top of the scraper conveyor. The scraper conveyor is located on the outer side of the tail of the enclosed belt conveyor.

[0010] Furthermore, the scraper conveyor includes a spiral housing, a spiral chain, baffles, and multiple scrapers. The spiral housing is fixedly installed on the tail of the enclosed belt conveyor and located outside the tail of the enclosed belt conveyor. The receiving pipe is connected to the bottom of the spiral housing, and the return pipe is connected to the top of the spiral housing. The spiral chain is rotatably installed inside the spiral housing. The multiple scrapers are fixedly installed at equal intervals on the spiral chain and are distributed in a spiral pattern. The baffles are fixedly installed inside the spiral housing and are inclined. The baffles are located inside the spiral chain and to the side of the return pipe.

[0011] Furthermore, a drive sprocket is rotatably mounted at the upper left corner inside the spiral-shaped housing, and the baffle is located below the drive sprocket. A tensioning plate is adjustable at the upper right corner of the spiral-shaped housing, and a tensioning sprocket located inside the spiral-shaped housing is rotatably mounted on the tensioning plate. Driven sprockets are rotatably mounted at the two lower corners inside the spiral-shaped housing. The spiral chain is wound between the drive sprocket, the tensioning sprocket, and the two driven sprockets. The rotation of the drive sprocket drives the tensioning sprocket and the two driven sprockets to rotate, thereby driving the spiral chain and multiple scrapers to rotate. The position of the tensioning plate can be adjusted up and down, thus changing the position of the tensioning sprocket up and down, ensuring that the spiral chain is always kept taut.

[0012] Furthermore, a first fixing frame is provided on the outside of the U-shaped housing, and a second fixing frame is fixedly provided on the tensioning plate located on the outside of the U-shaped housing. The tensioning stud passes through the first fixing frame and the second fixing frame and is fixedly connected to the two by the tensioning nut. A notch is provided at the upper right corner of the U-shaped housing, and the tensioning plate covers the notch.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model discloses a dust removal mechanism for a closed belt conveyor, which automatically scrapes away materials and accumulated dust on the return belt surface without stopping the machine for cleaning. This allows the closed belt conveyor to maintain continuous production, reduces the need for cleaning personnel and labor hours, keeps the belt clean, reduces running resistance, saves power consumption, and avoids dust explosions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main cross-section of a dust removal mechanism for a sealed belt conveyor according to this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram of A in the middle;

[0017] Figure 3 This utility model Figure 1 Enlarged structural diagram of B in the middle;

[0018] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure of C;

[0019] Figure 5 This is a top view of the V-shaped sweeper of this utility model;

[0020] Figure 6 This utility model Figure 5 Enlarged schematic diagram of the structure of D;

[0021] Figure 7 This is a side sectional view of the dust removal mechanism of this utility model;

[0022] The numbers in the attached diagram are:

[0023] 1. Enclosed belt conveyor; 11. Strip-shaped hole; 12. First bearing housing; 13. Rotating shaft; 14. First roller; 2. Belt; 21. Return belt surface; 22. Bearing belt surface; 3. Fixed shaft; 31. Limit sleeve; 32. Adjusting nut; 4. V-shaped cleaner; 41. V-shaped knife holder; 411. Horizontal plate; 42. V-shaped blade; 43. Gasket; 44. First bolt; 45. First nut; 5. Receiving pipe; 6. Return pipe; 7. Scraper conveyor; 71. Reverse housing; 711. First fixed frame; 72. Reverse chain; 73. Baffle; 74. Scraper; 75. Drive sprocket; 76. Motor; 77. Reducer; 8. Tensioning plate; 81. Tensioning sprocket; 82. Second fixed frame; 83. Tensioning stud; 84. Tensioning nut; 9. Driven sprocket. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-7 As shown, a dust removal mechanism for a closed belt conveyor 1 is disclosed. A belt 2 is rotatably mounted on the closed belt conveyor 1. The dust removal mechanism includes a fixed shaft 3 and a V-shaped cleaner 4. The fixed shaft 3 is adjustablely mounted on the tail end of the closed belt conveyor 1 and is located above the return surface 21 of the belt 2, i.e., above the lower half of the return surface 21. The V-shaped cleaner 4 is fixedly mounted on the fixed shaft 3, and its lower end contacts the return surface 21 of the belt 2, i.e., the lower half of the return surface 21. The belt 2 includes an outer surface and an inner surface. The outer surface is the load-bearing surface 22, and the inner surface is the return surface 21, i.e., the non-load-bearing surface. When the enclosed belt conveyor 1 is conveying materials, if materials and dust fall from the carrying belt surface 22 onto the return belt surface 21, the dust removal mechanism can automatically scrape off the materials and accumulated dust on the return belt surface 21 of the belt 2.

[0026] The working process of the dust removal mechanism: The fixed shaft 3 is fixed to the tail of the enclosed belt conveyor 1 according to the tension of the belt 2. After the position of the fixed shaft 3 is fixed, the position of the V-shaped cleaner 4 is also fixed, and the lower end of the V-shaped cleaner 4 contacts the return surface 21 of the belt 2. When the belt 2 rotates and conveys materials, the V-shaped cleaner 4 scrapes off the materials and accumulated dust on the return surface 21 of the belt 2. Because the V-shaped cleaner 4 is V-shaped, the scraped materials and accumulated dust are driven by the V-shaped cleaner 4 and move outward from the center point of the V-shaped cleaner 4 along both sides of the V-shaped cleaner 4. Finally, the scraped materials and accumulated dust fall off the return surface 21 of the belt 2.

[0027] The dust removal mechanism in this embodiment automatically scrapes off the material and dust on the return belt surface 21 of the belt 2 without stopping the machine for cleaning. This allows the enclosed belt conveyor 1 to maintain continuous production, reduces the need for cleaning personnel and labor hours, keeps the belt 2 clean, reduces running resistance, saves power consumption, and avoids dust explosions.

[0028] In one possible implementation, the V-shaped scraper 4 includes a V-shaped blade holder 41 and a V-shaped blade 42. The two ends of the V-shaped blade holder 41 are fixedly connected to a fixed shaft 3, and the V-shaped blade 42 is fixedly connected to the outside of the V-shaped blade holder 41. The lower end of the V-shaped blade 42 contacts the return surface 21 of the belt 2. Specifically, the V-shaped blade 42 scrapes away the material and accumulated dust on the return surface 21 of the belt 2. The scraped material and accumulated dust are driven by the V-shaped blade 42 and move outwards from the center point of the V-shaped blade 42 along both sides of the V-shaped blade 42, eventually falling off the return surface 21 of the belt 2. The length of the V-shaped blade 42 is greater than the width of the return surface 21 of the belt 2, ensuring that the entire return surface 21 of the belt 2 can be scraped by the V-shaped blade 42.

[0029] Preferably, the V-shaped tool holder 41 includes a V-shaped upright plate and a base plate fixedly connected together. The V-shaped upright plate is located on one side of the base plate, and the V-shaped blade 42 is fixedly connected to the outer side of the V-shaped upright plate. A reinforcing rib is provided on the inner side of the base plate, which enhances the structural strength of the V-shaped tool holder 41.

[0030] In one possible implementation, the V-shaped tool holder 41 is provided with multiple first screw holes, and the V-shaped blade 42 is provided with multiple second screw holes. A first bolt 44 passes through the first and second screw holes and is fixedly connected to a first nut 45. A washer 43 is fixedly provided between the first bolt 44 and the V-shaped blade 42. Specifically, two washers 43 are provided. The V-shaped tool holder 41 and the V-shaped blade 42 are fixedly connected by the first bolt 44 and the first nut 45. The washer 43 facilitates the fixed connection between the V-shaped tool holder 41 and the V-shaped blade 42, and protects the V-shaped blade 42 from being crushed by the first bolt 44.

[0031] In one possible implementation, both ends of the V-shaped cutter holder 41 are fixedly provided with horizontal plates 411, that is, both ends of the V-shaped vertical plate are fixedly provided with horizontal plates 411. The two ends of the fixed shaft 3 pass through the two horizontal plates 411 respectively and are fixedly connected to them. Both ends of the fixed shaft 3 are fixedly provided with limit sleeves 31, and the two limit sleeves 31 are located on the outside of the two horizontal plates 411. The tail of the sealed belt conveyor 1 is provided with two strip holes 11. The two limit sleeves 31 pass through the two strip holes 11 respectively and are fixedly connected by adjusting nuts 32, that is, locked on the tail of the sealed belt conveyor 1. The V-shaped cutter holder 41 is fixed to the fixed shaft 3 by the two horizontal plates 411. The fixed shaft 3 is locked at different height positions at the tail of the sealed belt conveyor 1 by the strip holes 11 and adjusting nuts 32, thereby adapting to the tension of the belt 2, so as to ensure that after the fixed shaft 3 is fixed, the lower end of the V-shaped cleaner 4 can always contact the return belt surface 21 of the belt 2. The two limiting sleeves 31 limit the positions of the V-shaped tool holder 41 and the V-shaped blade 42, ensuring that the V-shaped tool holder 41 and the V-shaped blade 42 are centered on the fixed shaft 3 and aligned with the belt 2. Preferably, the end of the fixed shaft 3 passes through a through hole in the horizontal plate 411, and the horizontal plate 411 is fixed to the fixed shaft 3. A gap is left between each limiting sleeve 31 and the horizontal plate 411, which allows for fine adjustment of the position of the V-shaped tool holder 41 on the fixed shaft 3 before fixing, ensuring that the V-shaped blade 42 can be aligned with the belt 2.

[0032] As one possible implementation, the system also includes a receiving pipe 5, a return pipe 6, and a scraper conveyor 7 fixedly installed at the tail of the enclosed belt conveyor 1. The receiving pipe 5 is located below the bearing surface 22 of the belt 2 and is fixedly connected to and communicates with the bottom of the scraper conveyor 7, that is, the receiving pipe 5 is located directly below the lower half of the bearing surface 22 of the belt 2. The V-shaped cleaner 4 is located above the receiving pipe 5. The return pipe 6 is located above the bearing surface 22 of the belt 2 and is fixedly connected to and communicates with the top of the scraper conveyor 7, that is, the return pipe 6 is located directly above the upper half of the bearing surface 22 of the belt 2. The scraper conveyor 7 is located on the outer side of the tail of the enclosed belt conveyor 1. The scraped material and accumulated dust fall from the return surface 21 of the belt 2 into the receiving pipe 5, and then enter the scraper conveyor 7. The scraper conveyor 7 starts, moving the scraped material and accumulated ash into the return pipe 6. Finally, the scraped material and accumulated ash return to the bearing surface 22 of the belt conveyor 2 through the return pipe 6. The scraped ash is then further processed as needed. The receiving pipe 5, return pipe 6, and scraper conveyor 7, in conjunction with the V-shaped cleaner 4, enable the return of scraped material, improving material utilization.

[0033] In one possible implementation, the scraper conveyor 7 includes a spiral housing 71, a spiral chain 72 (only part of which is shown in the figure), a baffle 73, and multiple scrapers 74. The spiral housing 71 is fixedly installed on the tail of the enclosed belt conveyor 1 and located outside the tail of the enclosed belt conveyor 1. The receiving pipe 5 is connected to the bottom of the spiral housing 71, and the return pipe 6 is connected to the top of the spiral housing 71. The spiral chain 72 is rotatably installed inside the spiral housing 71. Multiple scrapers 74 are fixedly installed at equal intervals on the spiral chain 72 and are distributed in a spiral pattern. The baffle 73 is fixedly installed in the upper left corner inside the spiral housing 71 and is inclined. The baffle 73 is located inside the spiral chain 72 and to the side of the return pipe 6. The positions of the baffle 73 and the spiral chain 72 do not interfere with each other.

[0034] The scraped material and ash fall from the return belt surface 21 of belt 2 into the receiving pipe 5, and then enter the rotary housing 71. The scraper conveyor 7 starts (starting at timed intervals), and the rotary chain 72 rotates clockwise, driving multiple scrapers 74 to rotate clockwise. The clockwise rotation of the multiple scrapers 74 causes the scraped material and ash to move within the rotary housing 71. Specifically, one end of the multiple scrapers 74 drives the scraped material and ash to move within the inner wall of the rotary housing 71. The scraped material and ash first move to the left, then upward, and finally to the right. During the upward and rightward movement, the scraped material and ash actually fall onto the inclined baffle 73, which also prevents the scraped material and ash from moving to the left. As the multiple scrapers 74 continue to rotate clockwise, the other end of the multiple scrapers 74 comes into contact with the scraped material and ash, thereby driving the material and ash on the baffle 73 into the return pipe 6. Finally, the scraped material is scraped back to the bearing surface 22 of the belt 2 through the return pipe 6.

[0035] In one possible implementation, a drive sprocket 75 is rotatably mounted at the upper left corner inside the spiral housing 71, and a tensioning plate 8 is adjustablely mounted at the upper right corner of the spiral housing 71. A tensioning sprocket 81, located inside the spiral housing 71, is rotatably mounted on the tensioning plate 8. Driven sprockets 9 are rotatably mounted at the two lower corners inside the spiral housing 71. The spiral chain 72 is wound between the drive sprocket 75, the tensioning sprocket 81, and the two driven sprockets 9. Rotation of the drive sprocket 75 drives the tensioning sprocket 81 and the two driven sprockets 9 to rotate, thereby driving the spiral chain 72 and the multiple scrapers 74 to rotate. The position of the tensioning plate 8 can be adjusted vertically, thus changing the position of the tensioning sprocket 81 to ensure that the spiral chain 72 is always under tension.

[0036] Furthermore, a motor 76 and a reducer 77 are fixedly mounted on the outside of the U-shaped housing 71. The motor 76 is fixedly connected to the drive sprocket 75 via the reducer 77 and drives it to rotate. The output shaft of the motor 76 is fixedly connected to the input end of the reducer 77, and the input end of the reducer 77 extends into the interior of the U-shaped housing 71 and is fixedly connected to the drive sprocket 75. When the motor 76 and reducer 77 are started, they drive the drive sprocket 75 to rotate.

[0037] Furthermore, a tension bearing seat is fixedly mounted on the tensioning plate 8, located inside the U-shaped housing 71. A tension bearing is rotatably mounted on the tension bearing seat, and the axle of the tensioning sprocket 81 is fixedly connected to the tension bearing. The tensioning sprocket 81 rotates via the tension bearing. The rotation of the tensioning sprocket 81 causes the tension bearing to rotate relative to the tension bearing seat.

[0038] Furthermore, driven bearing seats are provided at both lower corners inside the U-shaped housing 71, and driven bearings are rotatably mounted on the driven bearing seats. The axle of the driven sprocket 9 is fixedly connected to the driven bearing. The driven sprocket 9 rotates through the driven bearing. The rotation of the driven sprocket 9 drives the driven bearing to rotate relative to the driven bearing seat.

[0039] In one possible implementation, a first fixing frame 711 is provided on the outside of the U-shaped housing 71, and a second fixing frame 82 located outside the U-shaped housing 71 is fixedly provided on the tensioning plate 8. The tensioning stud 83 passes through the first fixing frame 711 and the second fixing frame 82 and is fixedly connected and locked to both by tensioning nuts 84. A notch is provided at the upper right corner of the U-shaped housing 71, and the tensioning plate 8 covers the notch. First, the head of the tensioning stud 83 is locked to the first fixing frame 711 by two tensioning nuts 84, and then the tail of the tensioning stud 83 is locked to the second fixing frame 82 by two tensioning nuts 84. At this time, the tensioning plate 8 and the tensioning sprocket 81 remain fixed. By locking the tensioning stud 83 at different positions on the second fixing frame 82, the position of the tensioning plate 8 is adjusted, and the position of the tensioning sprocket 81 is adjusted accordingly. After the position of the tensioning plate 8 is adjusted, it can always cover the gap in the spiral housing 71. The gap is to facilitate the tensioning sprocket 81 to pass through into the spiral housing 71.

[0040] Furthermore, after the position of the tension plate 8 is determined, the tension plate 8 can also be fixedly connected to the outside of the U-shaped housing 71 by locking bolts, so that the tension plate 8 can be further stabilized.

[0041] As one possible implementation, the rotation method of belt 2 is existing technology and will be briefly described here. Two first bearing seats 12 are fixedly installed at the tail end of the enclosed belt conveyor 1. A rotating shaft 13 is rotatably connected between the two first bearing seats 12. A first roller 14 is fixedly connected to the rotating shaft 13, and one end of the belt 2 is wound around the first roller 14. A typical enclosed belt conveyor 1 also has a second roller rotatably installed at the head end, and the other end of the belt 2 is wound around the second roller. The rotation method of the second roller is existing technology and will not be described in detail here.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A dust removal mechanism for a closed belt conveyor, wherein a belt (2) is rotatably mounted on the closed belt conveyor (1), characterized in that, The dust removal mechanism includes a fixed shaft (3) and a V-shaped cleaner (4). The fixed shaft (3) is adjustablely mounted on the tail of the sealed belt conveyor (1) and is located above the return belt surface (21) of the belt (2). The V-shaped cleaner (4) is fixedly mounted on the fixed shaft (3) and the lower end of the V-shaped cleaner (4) is in contact with the return belt surface (21) of the belt (2).

2. The dust removal mechanism according to claim 1, characterized in that, The V-shaped sweeper (4) includes a V-shaped blade holder (41) and a V-shaped blade (42). The two ends of the V-shaped blade holder (41) are fixedly connected to the fixed shaft (3), and the V-shaped blade (42) is fixedly connected to the outside of the V-shaped blade holder (41). The lower end of the V-shaped blade (42) contacts the return belt surface (21) of the belt (2).

3. The dust removal mechanism according to claim 2, characterized in that, The V-shaped tool holder (41) is provided with a plurality of first screw holes, and the V-shaped blade (42) is provided with a plurality of second screw holes. The first bolt (44) passes through the first screw holes and the second screw holes and is fixedly connected to the first nut (45). A washer (43) is fixedly provided between the first bolt (44) and the V-shaped blade (42).

4. The dust removal mechanism according to claim 2, characterized in that, Both ends of the V-shaped knife holder (41) are fixedly provided with horizontal plates (411). Both ends of the fixed shaft (3) pass through the two horizontal plates (411) and are fixedly connected to them. Both ends of the fixed shaft (3) are fixedly provided with limit sleeves (31). The two limit sleeves (31) are located on the outside of the two horizontal plates (411). The tail of the sealed belt conveyor (1) is provided with two strip holes (11). The two limit sleeves (31) pass through the two strip holes (11) and are fixedly connected to the tail of the sealed belt conveyor (1) by adjusting nuts (32).

5. The dust removal mechanism according to claim 1, characterized in that, It also includes a receiving pipe (5), a return pipe (6) and a scraper conveyor (7) fixedly installed on the tail of the enclosed belt conveyor (1). The receiving pipe (5) is located below the bearing surface (22) of the belt (2) and is fixedly connected to and communicates with the bottom of the scraper conveyor (7). The V-shaped cleaner (4) is located above the receiving pipe (5). The return pipe (6) is located above the bearing surface (22) of the belt (2) and is fixedly connected to and communicates with the top of the scraper conveyor (7). The scraper conveyor (7) is located on the outer side of the tail of the enclosed belt conveyor (1).

6. The dust removal mechanism according to claim 5, characterized in that, The scraper conveyor (7) includes a spiral housing (71), a spiral chain (72), a baffle (73), and multiple scrapers (74). The spiral housing (71) is fixedly installed on the tail of the closed belt conveyor (1) and located outside the tail of the closed belt conveyor (1). The receiving pipe (5) is connected to the bottom of the spiral housing (71), and the return pipe (6) is connected to the top of the spiral housing (71). The spiral chain (72) is rotatably installed inside the spiral housing (71). Multiple scrapers (74) are fixedly installed at equal intervals on the spiral chain (72) and are distributed in a spiral shape. The baffle (73) is fixedly installed inside the spiral housing (71) and is inclined. The baffle (73) is located inside the spiral chain (72) and to the side of the return pipe (6).

7. The dust removal mechanism according to claim 6, characterized in that, A drive sprocket (75) is rotatably mounted on the upper left corner inside the spiral housing (71). A tensioning plate (8) is adjustablely mounted on the upper right corner of the spiral housing (71). A tensioning sprocket (81) located inside the spiral housing (71) is rotatably mounted on the tensioning plate (8). Driven sprockets (9) are rotatably mounted at the two lower corners inside the spiral housing (71). The spiral chain (72) is wound between the drive sprocket (75), the tensioning sprocket (81), and the two driven sprockets (9).

8. The dust removal mechanism according to claim 7, characterized in that, The outer side of the spiral housing (71) is provided with a first fixing frame (711), and the tensioning plate (8) is fixedly provided with a second fixing frame (82) located outside the spiral housing (71). The tensioning stud (83) passes through the first fixing frame (711) and the second fixing frame (82) and is fixedly connected to the two by the tensioning nut (84). The upper right corner of the spiral housing (71) is provided with a notch, and the tensioning plate (8) covers the notch.

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