Collected coal cleaning device at tail of coal belt conveyor

Abstract

The utility model relates to the technical field of coal conveying belt cleaning, in particular to a coal conveying belt conveyor tail coal collecting and cleaning device which comprises a supporting frame, a connecting frame, a cleaning assembly, a telescopic cylinder and a connecting shaft, the two sides of the supporting frame are fixedly and detachably connected with supporting columns on the lower portion of the coal conveying belt conveyor tail, and the supporting frame comprises a moving rod. The moving rod moves along the supporting frame through the action of the lead screw nut mechanism; one side of the connecting frame is fixedly connected with the moving rod, a plurality of cleaning assemblies are rotationally arranged on the other side of the connecting frame and connected with the telescopic cylinder through connecting shafts, each cleaning assembly comprises a scraping plate, a spring is arranged on the lower portion of each scraping plate, and the upper portion of each scraping plate abuts against the belt; the two ends of the telescopic cylinder are hinged to the connecting frame and the connecting shaft respectively. The scraper device is simple in structure, the multiple adjustable scrapers are attached to the uneven belt surface of the coal conveying belt conveyor to scrape back coal, and normal operation of the belt conveyor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal conveying belt cleaning, in particular to a coal collecting cleaning device at the tail of a coal conveying belt machine. Background Art

[0002] The belt conveyor in the boiler coal conveying system is one of the necessary components for transporting coal. After the belt conveyor has been running for a long time, the lower belt may pull back the coal to varying degrees due to reasons such as belt deviation, impact of large pieces of coal, and large amount of coal. The returned coal makes a circular motion through the belt and the tail roller. When returning, the returned coal may fall off the lower belt and fall under the belt conveyor, resulting in a large amount of coal loss. At the same time, the coal needs to be cleaned manually. When the operator cleans the scattered coal under the belt conveyor, if the belt conveyor is not stopped, it may cause harm to the operator; and after the belt of the belt conveyor has been running for a long time, the edge of the belt may warp or holes may appear on the belt surface, causing the belt surface to be uneven.

[0003] The invention patent with publication number CN116002328A discloses a coal conveyor belt ash and slag cleaner, which adopts a scraper with adjustable angle to scrape the ash and slag on the coal conveyor belt. After the scraping end of the scraper contacts the lower surface of the coal conveyor belt, the angle of the scraper is fixed. If the coal conveyor belt is warped due to long-term operation, the scraper contacts the warped position of the coal conveyor belt, which may accelerate the damage of the coal conveyor belt and affect the service life of the coal conveyor belt. The concave part of the coal conveyor belt may not be able to contact the scraper, and the returned coal cannot be cleaned up.

[0004] Therefore, it is urgent to provide a coal conveying belt machine tail coal collecting and cleaning device to solve the above problems. Utility Model Content

[0005] In view of the above problems, the utility model provides a coal collecting and cleaning device at the tail of a coal conveying belt conveyor. The device has a simple structure and adopts a plurality of adjustable scrapers to fit the uneven belt surface of the belt conveyor to scrape off the returned coal, thereby ensuring the normal operation of the belt conveyor.

[0006] The technical solution adopted by the utility model to solve its technical problems:

[0007] A coal collecting and cleaning device at the tail of a coal conveyor belt conveyor is installed at the lower part of the tail of the coal conveyor belt conveyor and cleans the returned coal attached to the lower belt. It includes a support frame, a connecting frame, a cleaning assembly, a telescopic cylinder and a connecting shaft. Both sides of the support frame are fixedly and detachably connected to the lower part of the tail of the coal conveyor belt conveyor. The support frame includes a moving rod, and the moving rod moves along the support frame through a screw nut mechanism; one side of the connecting frame is fixedly connected to the moving rod, and a plurality of groups of cleaning assemblies are rotatably arranged on the other side, and the plurality of groups of cleaning assemblies are connected to the telescopic cylinder through a connecting shaft. The cleaning assembly includes a scraper, a spring is arranged at the lower part of the scraper, and the upper part of the scraper abuts against the belt; the two ends of the telescopic cylinder are respectively hinged to the connecting frame and the connecting shaft.

[0008] Preferably, the cleaning assembly also includes a connecting plate and a hollow column, the scraper is slidably connected to the connecting frame, a sliding rod is arranged at the lower end of the scraper, a hollow column is fixedly arranged on the connecting plate, the lower end of the sliding rod is plugged and slidably connected to the hollow column, and a spring is arranged on the outer sleeve of the sliding rod.

[0009] Preferably, the side of the connecting plate away from the scraper is rotatably connected to the connecting shaft through a lug, the middle part of the connecting shaft is rotatably connected to the telescopic end of the telescopic cylinder, and the fixed end of the telescopic cylinder is rotatably connected to the connecting frame.

[0010] Preferably, the connecting frame includes connecting rod 1, connecting rod 2, connecting rod 3 and a cross brace. The connecting rod 1 and connecting rod 2 are symmetrically arranged. Two connecting rods 3 and two cross braces are each arranged. The two connecting rods 3 are fixedly arranged at both ends of the connecting rod 1 and the connecting rod 2. The two cross braces are respectively fixedly arranged at the upper ends of the two connecting rods 3. The two ends of the cross braces are respectively connected to the connecting rod 1 and the connecting rod 2.

[0011] Preferably, a round rod is fixedly arranged between the two connecting rods, and the round rod is rotatably connected to the fixed end of the telescopic cylinder; a movable shaft is fixedly arranged at one end of the cross brace, and the movable shaft is rotatably connected to the connecting plate.

[0012] Preferably, the support frame includes column one, column two, connecting parts and screw rods. Column one and column two are arranged in parallel. Connecting parts are fixedly provided on non-adjacent sides of column one and column two. The connecting parts are detachably connected to the coal conveyor belt by bolts. A vertical rod is fixedly provided in column one, a screw rod is vertically provided in column two, a fixing seat is fixedly provided at the lower end of column two, the upper end of the screw rod is rotatably connected to the upper end of column two, and the lower end is rotatably connected to the fixing seat, and a locking and releasing mechanism is provided on the fixing seat.

[0013] Preferably, one end of the movable rod is threadedly connected to the screw rod through a nut block, and the other end is slidably connected to an inner vertical rod of a column. A plurality of connecting holes are evenly spaced along the length direction on the movable rod, and a plurality of through holes are evenly spaced along the length direction on the connecting rod. The plurality of connecting holes are connected to the plurality of through holes in a one-to-one correspondence.

[0014] Preferably, the support frame also includes a driven bevel gear and a driving bevel gear, the driving bevel gear is arranged inside the second column, and the driven bevel gear is fixedly sleeved at the lower part of the screw rod. The locking and releasing mechanism includes a rotating shaft, one end of the rotating shaft extends into the second column, the driving bevel gear is fixedly arranged on the end head of the rotating shaft, and the driving bevel gear and the driven bevel gear are matched and connected.

[0015] Preferably, the locking and releasing mechanism also includes a locking sleeve, a sliding member and a crank; the locking sleeve is fixedly arranged on a fixed seat, and a plurality of tooth-shaped grooves are arranged circumferentially inside the locking sleeve; the crank is fixedly connected to the rotating shaft, and a sliding member is slidably arranged on one end of the rotating shaft close to the crank, and a plurality of tooth-shaped blocks are arranged circumferentially outside the sliding member, and the plurality of tooth-shaped blocks cooperate with the plurality of tooth-shaped grooves on the locking sleeve.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor. A plurality of cleaning components are arranged along the belt. The plurality of cleaning components are fitted to the uneven belt surface through the action of springs. The cleaning components also include a scraper and a connecting plate. The scraper and the connecting plate are slidably connected. A sliding rod is arranged at the lower end of the scraper. A spring is arranged on the sliding rod. If the belt surface is uneven, the scraper is moved along the connecting plate under the action of the spring to fit the uneven belt, thereby preventing the return coal from adhering to the belt surface and ensuring the normal operation of the belt conveyor. The device can be used when the belt is uneven, effectively improving the cleaning effect, preventing the return coal from being scattered under the belt conveyor, and reducing safety hazards.

[0018] The utility model provides a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor, which also includes a support frame fixed under the belt conveyor, a connecting frame lifted and lowered along the support frame, and a connecting plate connected to a telescopic cylinder through a connecting shaft. The telescopic cylinder changes the position of the connecting plate by adjusting and fixing the connecting shaft, and can adjust the angle of the cleaning component. The structure is simple, and it is easy to install and dismantle, and can be disassembled and used repeatedly. The device can also be suitable for belt conveyors of various heights, and has strong adaptability. During the operation of the belt conveyor, the cleaning work of the tail is carried out uninterruptedly, which greatly improves the cleaning efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the connection structure of a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the connection structure between a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor and a lower support at the tail of the coal conveyor belt conveyor according to an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the support frame connection according to the embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the exploded structure of the connection part between the connecting frame and the cleaning component of the embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the connection structure of the scraper, connecting plate, slide rod and spring in the embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the connection decomposition structure of the locking and releasing mechanism of the embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Support frame; 11. Column 1; 111. Vertical rod; 12. Column 2; 121. Fixed seat; 13. Connector; 14. Fixed rod; 15. Screw rod; 16. Driven bevel gear; 17. Active bevel gear; 18. Locking and releasing mechanism; 181. Rotating shaft; 1811. Slide; 1812. Slot; 182. Locking sleeve; 183. Sliding piece; 1831. Block; 184. Crank; 19. Moving rod; 2. Connecting frame ; 21. Connecting rod one; 211. Perforation; 22. Connecting rod two; 23. Connecting rod three; 24. Cross brace; 25. Round rod; 27. Movable shaft; 3. Cleaning assembly; 31. Scraper; 311. Guide block; 312. Slide rod; 32. Connecting plate; 321. Lug; 322. Hinge; 323. Boss; 324. Guide groove; 33. Hollow column; 34. Spring; 4. Telescopic cylinder; 5. Coal conveyor belt; 6. Connecting shaft. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the following description of the utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" only indicates the connection between devices and has no special meaning.

[0030] For specific embodiments, see Figure 1-Figure 6, a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor, which is installed at the lower part of the tail of the coal conveyor belt conveyor 5 and cleans the returned coal attached to the lower belt, comprises a support frame 1, a connecting frame 2, a cleaning component 3, a telescopic cylinder 4 and a connecting shaft 6, wherein both sides of the support frame 1 are fixedly and detachably connected to the pillars at the lower part of the tail of the coal conveyor belt conveyor 5, the support frame 1 comprises a moving rod 19, and the moving rod 19 moves along the support frame 1 through the action of a lead screw nut mechanism; one side of the connecting frame 2 is fixedly connected to the moving rod 19, and a plurality of groups of cleaning components 3 are rotatably arranged on the other side, and the plurality of groups of cleaning components 3 are all connected to the telescopic cylinder 4 through the connecting shaft 6, the cleaning component 3 comprises a scraper 31, a spring 34 is arranged at the lower part of the scraper 31, and the upper part of the scraper 31 abuts against the belt; the two ends of the telescopic cylinder 4 are respectively hinged to the connecting frame 2 and the connecting shaft 6.

[0031] The support frame 1 includes a column 11, a column 12, a connecting piece 13, a fixed rod 14, a screw 15, a locking and releasing mechanism 18 and a moving rod 19; the column 11 and the column 12 are both hollow square rods, the column 11 and the column 12 are arranged in parallel, and a plurality of connecting pieces 13 are fixedly arranged on the non-adjacent sides of the column 11 and the column 12, and the plurality of connecting pieces 13 are evenly arranged along the upper and lower intervals, and the connecting pieces 13 are fixedly and detachably connected to the pillars at the lower part of the tail of the coal conveyor belt 5 by bolts; a vertical rod 111 is fixedly arranged in the column 11, and a fixed seat 121 is fixedly arranged at the lower end of the column 2 12, and the fixed seat 121 extends upward from the side of the column 11 to form a fixed plate, and a locking and releasing mechanism 18 is arranged on the fixed plate; the fixing rod 14 is arranged on the column The screw rod 15 is vertically arranged in the column 12, the upper end of the screw rod 15 is rotatably connected to the upper part of the column 12, and the lower end of the screw rod 15 is rotatably connected to the fixed seat 121; the moving rod 19 is arranged between the column 11 and the column 2, one end of the moving rod 19 is threadedly connected to the screw rod 15 through a nut block, and the other end is slidably connected to the vertical rod 111 in the column 11, and a plurality of connecting holes are evenly spaced along the length direction on the moving rod 19; the screw rod 15 rotates, so that the moving rod 19 drives the connecting frame 2 and the cleaning component 3 to rise or fall, adapting to various heights of the coal conveyor belt 5, so that the cleaning component 3 connected to the connecting frame 2 scrapes off the return coal attached to the lower belt of the coal conveyor belt 5.

[0032] The locking and releasing mechanism 18 comprises a rotating shaft 181, a locking sleeve 182, a sliding member 183 and a crank 184; the locking sleeve 182 is fixedly arranged on the fixed seat 121, and a plurality of tooth-shaped grooves are arranged in the locking sleeve 182 at intervals along the circumferential direction; a rotating shaft 181 is fixedly arranged on one side of the crank 184, and the rotating shaft 181 passes through the fixed seat 121 and extends to the inside of the second column 12, and the rotating shaft 181 is rotatably connected with the fixed seat 121 and the second column 12, and an end of the rotating shaft 181 close to the crank 184 is opened. A slide groove 1811 is provided, and a plurality of slots 1812 are arranged at intervals along the circumferential direction on the slide groove 1811. A sliding member 183 is slidably arranged on the rotating shaft 181. A plurality of blocks 1831 are arranged at intervals along the circumferential direction inside the sliding member 183. The blocks 1831 cooperate with the slot 1812 to make the sliding member 183 move axially along the slide groove 1811. A plurality of toothed blocks are arranged at intervals along the circumferential direction outside the sliding member 183. The plurality of toothed blocks cooperate with a plurality of toothed grooves on the locking sleeve 182 to connect, lock or release the rotating shaft 181.

[0033] The support frame 1 also includes a driven bevel gear 16 and a driving bevel gear 17. The driving bevel gear 17 is fixedly provided on the end of the rotating shaft 181 extending into the interior of the second column 12. The driven bevel gear 16 is fixedly sleeved on the lower part of the screw rod 15, and the driving bevel gear 17 and the driven bevel gear 16 are matched and connected; when the moving rod 19 rises or falls, the sliding member 183 is slid to separate the sliding member 183 from the locking sleeve 182, and the crank 184 is turned to drive the rotating shaft 181, the driving bevel gear 17 and the driven bevel gear 16 to rotate, so that the screw rod 15 rotates, and the moving rod 19 and the parts connected thereto are driven to rise or fall.

[0034] The connecting frame 2 includes a connecting rod 1 21, a connecting rod 22, a connecting rod 3 23, a cross brace 24, a round rod 25 and a movable shaft 27; the connecting rod 1 21 and the connecting rod 2 22 are both L-shaped rods, and the connecting rod 1 21 and the connecting rod 2 22 are symmetrically arranged. A plurality of through holes 211 are evenly spaced along the length direction on the connecting rod 1 21, and the plurality of through holes 211 are connected to the plurality of connecting holes on the moving rod 19 in a one-to-one correspondence; two connecting rods 3 23 are arranged, and the two connecting rods 3 23 They are fixedly arranged at both ends of the connecting rod 1 21 and the connecting rod 2 22, a round rod 25 is passed between the two connecting rods 3 23, the round rod 25 is fixedly connected to the connecting rod 3 23 through a nut, and the round rod 25 is used to connect the telescopic cylinder 4; two cross braces 24 are arranged, and the two cross braces 24 are respectively fixedly arranged on the upper ends of the two connecting rods 3 23, and the two ends of the cross brace 24 are respectively fixedly connected to the connecting rod 1 21 and the connecting rod 2 22, and a movable shaft 27 is fixedly arranged at one end of the cross brace 24 away from the moving rod 19.

[0035] Each group of the cleaning components 3 also includes a connecting plate 32 and a hollow column 33. A guide block 311 is provided on one side of the scraper 31, a sliding rod 312 is provided on the lower end of the scraper 31, a connecting plate 32 is provided on the side of the scraper 31 where the guide block 311 is provided, and a guide groove 324 is provided on the connecting plate 32 close to the scraper 31. The guide block 311 is plugged into the guide groove 324, and the scraper 31 is slidably connected to the connecting plate 32. A boss 323 is provided below the guide groove 324. A lug 321 is provided on the side of the scraper 31 away from the scraper 31 for connecting to the telescopic cylinder 4. A hinge 322 is provided at the lower end of the connecting plate 32, and the hinge 322 is rotatably connected to the movable shaft 27; the hollow column 33 is fixedly provided on the boss 323, and the hollow column 3 3 is plugged into and slidably connected with the sliding rod 312 on the scraper 31, and a spring 34 is sleeved on the sliding rod 312, and the two ends of the spring 34 are fixedly connected to the scraper 31 and the hollow column 33 respectively; when the cleaning component 3 cleans the coal conveyor belt 5, the upper end of the scraper 31 contacts the belt under the tail of the coal conveyor belt 5. At this time, the spring 34 is in a compressed state, and the scraper 31 receives the force of the spring 34 and fits with the belt on the coal conveyor belt 5. If the belt on the coal conveyor belt 5 is warped due to long-term operation, the warped belt pushes the scraper 31 to move downward along the connecting plate 32, and the scraper 31 continues to compress the spring 34; if there are potholes in the belt, under the elastic force of the spring 34, the tube scraper 31 is pushed to move upward along the connecting plate 32, and the upper end of the scraper 31 fits the belt surface.

[0036] The connecting shaft 6 passes through the multiple groups of lugs 321 on the connecting plates 32 one by one, and the two ends of the connecting shaft 6 are locked by nuts respectively. The middle part of the connecting shaft 6 is rotatably connected with the telescopic end of the telescopic cylinder 4, and the fixed end of the telescopic cylinder 4 is rotatably connected with the middle part of the round rod 25. The telescopic cylinder 4 is actuated to adjust and fix the angle between the cleaning component 3 and the coal conveyor belt 5; when the device is used, the extended end of the telescopic cylinder 4 is retracted to separate the scraper 31 from the belt of the coal conveyor belt 5, so that the device is easy to be disassembled from the coal conveyor belt 5.

[0037] The use process and working principle of this device:

[0038] Fix the column 11 and the column 2 12 on the pillars at the lower part of the tail of the coal conveyor belt 5 respectively through the connecting piece 13, slide the sliding piece 183 to separate the sliding piece 183 from the locking sleeve 182, turn the crank 184, drive the rotating shaft 181, the active bevel gear 17 and the driven bevel gear 16 to rotate, so that the screw 15 rotates, and drives the moving rod 19 and the parts connected to it to rise or fall to the appropriate position; start the telescopic cylinder 4, the extended end of the telescopic cylinder 4 extends, and drives the multiple cleaning assemblies 3 to rotate to the appropriate position, until the upper ends of the scrapers 31 in the multiple cleaning assemblies 3 are all in contact with the belt of the coal conveyor belt 5, and at the same time, the sliding rod 312 slides along the connecting plate 32 to compress the spring 34; when the coal conveyor belt 5 is running, the return coal attached to the belt contacts the upper end of the scraper 31, and the return coal is scraped off by the multiple scrapers 31.

[0039] If the belt of the coal conveyor belt 5 is warped after long-term use, the scraper 31 in at least one group of cleaning components 3 corresponding to the warped position of the coal conveyor belt 5 continues to rotate downward along the connecting plate 32, and the spring 34 continues to be compressed so that the upper end of the scraper 31 continues to fit the warped belt surface of the coal conveyor belt 5. If there are holes in the belt, the elastic force of the spring 34 pushes the tube scraper 31 to move upward along the connecting plate 32, and the upper end of the scraper 31 fits the belt surface to scrape off the returned coal attached to the belt of the coal conveyor belt 5.

[0040] The utility model provides a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor. A plurality of cleaning components are arranged along the belt. The plurality of cleaning components are fitted to the uneven belt surface through the action of springs. The cleaning components also include a scraper and a connecting plate. The scraper and the connecting plate are slidably connected. A sliding rod is arranged at the lower end of the scraper. A spring is arranged on the sliding rod. If the belt surface is uneven, the scraper is moved along the connecting plate under the action of the spring to fit the uneven belt, thereby preventing the return coal from adhering to the belt surface and ensuring the normal operation of the belt conveyor. The device can be used when the belt is uneven, effectively improving the cleaning effect, preventing the return coal from being scattered under the belt conveyor, and reducing safety hazards.

[0041] The utility model provides a coal collecting and cleaning device at the tail of a coal conveyor belt conveyor, which also includes a support frame fixed under the belt conveyor, a connecting frame lifted and lowered along the support frame, and a connecting plate connected to a telescopic cylinder through a connecting shaft. The telescopic cylinder changes the position of the connecting plate by adjusting and fixing the connecting shaft, and can adjust the angle of the cleaning component. The structure is simple, and it is easy to install and dismantle, and can be disassembled and used repeatedly. The device can also be suitable for belt conveyors of various heights, and has strong adaptability. During the operation of the belt conveyor, the cleaning work of the tail is carried out uninterruptedly, which greatly improves the cleaning efficiency and quality.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal collecting and cleaning device at the tail of a coal conveyor belt, installed at the lower part of the tail of a coal conveyor belt (5) and cleaning the returned coal attached to the lower belt, characterized in that: The invention comprises a support frame (1), a connecting frame (2), a cleaning component (3), a telescopic cylinder (4) and a connecting shaft (6). The two sides of the support frame (1) are fixedly and detachably connected to the lower part of the tail of the coal conveyor belt (5). The support frame (1) comprises a moving rod (19). The moving rod (19) moves along the support frame (1) through the action of a screw nut mechanism. One side of the connecting frame (2) is fixedly connected to the moving rod (19). On the other side, a plurality of cleaning components (3) are rotatably arranged. The plurality of cleaning components (3) are connected to the telescopic cylinder (4) through the connecting shaft (6). The cleaning component (3) comprises a scraper (31). A spring (34) is arranged at the lower part of the scraper (31). The upper part of the scraper (31) is in contact with the belt. The two ends of the telescopic cylinder (4) are respectively hinged to the connecting frame (2) and the connecting shaft (6).

2. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 1, characterized in that: The cleaning assembly (3) further comprises a connecting plate (32) and a hollow column (33); the scraper (31) is slidably connected to the connecting frame (2); a sliding rod (312) is arranged at the lower end of the scraper (31); the hollow column (33) is fixedly arranged on the connecting plate (32); the lower end of the sliding rod (312) is plugged and slidably connected to the hollow column (33); and a spring (34) is arranged on the outer sleeve of the sliding rod (312).

3. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 2, characterized in that: The side of the connecting plate (32) away from the scraper plate (31) is rotatably connected to the connecting shaft (6) via a lug (321), the middle part of the connecting shaft (6) is rotatably connected to the telescopic end of the telescopic cylinder (4), and the fixed end of the telescopic cylinder (4) is rotatably connected to the connecting frame (2).

4. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 1, characterized in that: The connecting frame (2) comprises a connecting rod 1 (21), a connecting rod 2 (22), a connecting rod 3 (23) and a cross brace (24); the connecting rod 1 (21) and the connecting rod 2 (22) are symmetrically arranged; two connecting rods 3 (23) and two cross braces (24) are arranged; the two connecting rods 3 (23) are fixedly arranged at both ends of the connecting rod 1 (21) and the connecting rod 2 (22); the two cross braces (24) are respectively fixedly arranged at the upper ends of the two connecting rods 3 (23); and the two ends of the cross brace (24) are respectively connected to the connecting rod 1 (21) and the connecting rod 2 (22).

5. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 4, characterized in that: A round rod (25) is fixedly arranged between the two connecting rods (23), and the round rod (25) is rotatably connected to the fixed end of the telescopic cylinder (4); a movable shaft (27) is fixedly arranged at one end of the cross brace (24), and the movable shaft (27) is rotatably connected to the connecting plate (32).

6. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 1, characterized in that: The support frame (1) comprises a first column (11), a second column (12), a connecting piece (13) and a screw rod (15); the first column (11) and the second column (12) are arranged in parallel; the non-adjacent side parts of the first column (11) and the second column (12) are fixedly provided with the connecting piece (13); the connecting piece (13) is detachably connected to the coal conveyor belt (5) by bolts; a vertical rod (111) is fixedly provided in the first column (11); the screw rod (15) is vertically provided in the second column (12); a fixed seat (121) is fixedly provided at the lower end of the second column (12); the upper end of the screw rod (15) is rotatably connected to the upper end of the second column (12); the lower end of the screw rod (15) is rotatably connected to the fixed seat (121); a locking and releasing mechanism (18) is provided on the fixed seat (121).

7. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 6, characterized in that: One end of the moving rod (19) is threadedly connected to the screw rod (15) through a nut block, and the other end is slidably connected to the vertical rod (111) inside the column (11). A plurality of connection holes are evenly spaced along the length direction on the moving rod (19), and a plurality of through holes (211) are evenly spaced along the length direction on the connecting rod (21). The plurality of connection holes are connected to the plurality of through holes (211) in a one-to-one correspondence.

8. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 7, characterized in that: The support frame (1) further comprises a driven bevel gear (16) and a driving bevel gear (17), wherein the driving bevel gear (17) is arranged inside the second column (12), and the driven bevel gear (16) is fixedly sleeved on the lower part of the screw rod (15), and the locking and releasing mechanism (18) comprises a rotating shaft (181), one end of the rotating shaft (181) extends into the second column (12), and the driving bevel gear (17) is fixedly arranged on the end of the rotating shaft (181), and the driving bevel gear (17) and the driven bevel gear (16) are matched and connected.

9. The coal collecting and cleaning device at the tail of a coal conveyor belt conveyor according to claim 8, characterized in that: The locking and releasing mechanism (18) further comprises a locking sleeve (182), a sliding member (183) and a crank (184); the locking sleeve (182) is fixedly arranged on the fixed seat (121), and a plurality of tooth-shaped grooves are arranged in the locking sleeve (182) at intervals along the circumferential direction; the crank (184) is fixedly connected to the rotating shaft (181), and a sliding member (183) is slidably arranged at one end of the rotating shaft (181) close to the crank (184), and a plurality of tooth-shaped blocks are arranged in the circumferential direction at intervals on the outer side of the sliding member (183), and the plurality of tooth-shaped blocks cooperate with the plurality of tooth-shaped grooves on the locking sleeve (182).

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