Coal cleaning device for tail of scraper conveyer

Abstract

The utility model relates to a coal cleaning device for the tail of a scraper conveyer, and belongs to the technical field of scraper conveyors. Comprising a machine tail and a coal cleaning mechanism, the coal cleaning mechanism comprises a cleaning box, the rear end of the machine tail is inserted into the cleaning box, a horizontal lifting oil cylinder is arranged on the bottom face in the cleaning box, and a lifting frame is rotationally arranged at one end of a piston rod of the lifting oil cylinder; a lifting platform is further arranged in the cleaning box, a collecting tank is rotationally arranged on the lifting platform and located at the rear end of the machine tail, and a dumping oil cylinder is arranged between the collecting tank and the lifting platform. A set of connecting rods are arranged between the lifting platform and the inner walls of the two sides of the cleaning box correspondingly, and the middles of the connecting rods are hinged to the lifting frame. According to the scraper conveyor tail cleaning device, residual coal briquettes at the scraper conveyor tail can be cleaned, the collected coal briquettes are poured onto the material supporting plate again when the scraper conveyor is in a shutdown state, and the problem that a large number of coal briquettes are left at the scraper conveyor tail at present is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of scraper conveyors, and in particular relates to a coal cleaning device used at the tail of a scraper conveyor. Background Art

[0002] Scraper conveyor is a conveyor that uses scraper chains to transport bulk materials in a trough. It consists of three parts: the head, the middle and the tail. According to the layout and structure, it can be divided into parallel and overlapping types. According to the number of chains and the layout, it can be divided into four types: single chain, double-sided chain, double center chain and triple chain.

[0003] When the scraper conveyor is transporting coal blocks, the material is loaded at the tail section of the machine, and the scraper is used to transport the coal blocks through the middle section to the head section and output to the outside. During the transportation process, a large amount of coal blocks will remain at the tail of the scraper conveyor. The remaining coal blocks will slowly accumulate and affect the normal operation of the scraper conveyor. Therefore, it is necessary to clean the coal blocks remaining at the tail section. The existing cleaning method is to stop the scraper conveyor and then manually clean the coal blocks. This method is not only inefficient, but also affects the normal working rhythm of the scraper conveyor. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and provides a coal cleaning device for the tail of a scraper conveyor, thereby solving the problem that a large number of coal blocks remain at the tail of the scraper conveyor.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0006] A coal cleaning device for the tail of a scraper conveyor comprises a tail and a coal cleaning mechanism, wherein the coal cleaning mechanism comprises a cleaning box, wherein the rear end of the tail is plugged into the interior of the cleaning box, a horizontal lifting cylinder is arranged at the bottom surface of the interior of the cleaning box, and a lifting frame is rotatably arranged at one end of the piston rod of the lifting cylinder; a lifting platform is also arranged inside the cleaning box, and a collecting trough is rotatably arranged on the lifting platform, the collecting trough is located at the rear end of the tail, and a dumping cylinder is arranged between the collecting trough and the lifting platform; a group of connecting rods are arranged between the lifting platform and the inner walls on both sides of the cleaning box, and the middle part of the connecting rods is hinged to the lifting frame.

[0007] Furthermore, the tail includes a tail frame, which is a square box structure extending front and back with the rear end kept open, and a trumpet-shaped feed hopper is arranged in the middle of the upper end of the tail frame; a row of brackets is arranged at the lower end of the tail frame, and the row of brackets is in contact with the ground.

[0008] Furthermore, a left and right horizontal sprocket shaft is rotatably arranged at the rear end of the tail frame, and the left and right ends of the sprocket shaft are rotatably connected to the rear ends of the left and right inner walls of the tail frame through bearing seats respectively; a driven sprocket is fixedly arranged at both ends of the sprocket shaft; two left and right symmetrical driving sprockets are arranged at the head of the scraper conveyor, and the two chains are respectively connected between the driving sprocket and the driven sprocket on both sides.

[0009] Furthermore, a circle of equidistant scrapers is arranged between the two chains, the scrapers are arranged along the left and right directions, and the left and right ends of the scrapers are respectively fixedly connected to the two chains; a support plate is fixedly arranged inside the tail frame, the support plate is located on the inner side of a circle of scrapers, the support plate extends along the front and rear directions, and the scraper located on the upper side contacts the upper end surface of the support plate.

[0010] Furthermore, the cleaning box is a square box structure, which is placed on the ground. A window is provided in the middle of the front side wall of the cleaning box. The rear end of the tail rack extends into the interior of the cleaning box through the window, and the upper end of the tail rack extending into the interior of the cleaning box remains open; openable inspection doors are provided on the rear side wall and the top plate of the cleaning box.

[0011] Furthermore, the cylinder body of the lifting cylinder is fixedly arranged on the inner bottom surface of the cleaning box, and one end of the piston rod of the lifting cylinder extends horizontally forward; the lifting frame is a U-shaped rod structure, including a transverse rod and two longitudinal rods, the two ends of the transverse rod are respectively fixedly connected to one end of the two longitudinal rods, and the middle part of the transverse rod is rotatably inserted into one end of the piston rod of the lifting cylinder.

[0012] Furthermore, the lifting platform remains horizontal, and the front end of the lower end face of the collecting trough is hinged to the front end of the upper end face of the lifting platform; the collecting trough is a square box structure with an open upper end, and the upper end of the front side wall of the collecting trough is inclined toward the front side, and the upper end of the front side wall of the collecting trough is connected to the rear end of the bottom plate of the tail frame.

[0013] Furthermore, the two groups of connecting rods are symmetrically arranged on the left and right; each group includes two front and rear connecting rods parallel to each other, the lower ends of the two connecting rods are hinged to the lifting platform, and the upper ends of the two connecting rods are hinged to the inner wall of the cleaning box; the hinge axes at both ends of the front and rear connecting rods are horizontally arranged along the left and right directions, and the hinge axes at the upper ends of the front and rear connecting rods are at the same height, and the hinge axes at the lower ends of the front and rear connecting rods are at the same height, so that a parallelogram structure is formed between the two connecting rods of each group, the lifting platform, and the inner wall of the cleaning box.

[0014] Furthermore, one end of the two longitudinal rods of the lifting frame away from the transverse rod is respectively hinged to the middle part of the connecting rod on the front side of the two groups of connecting rods. At this time, the front end of the longitudinal rod of the lifting frame is located below the rear end of the longitudinal rod, and the piston rod of the lifting cylinder is in an extended state.

[0015] Furthermore, a U-shaped groove opening backwards is provided in the middle part of the rear end surface of the lifting platform, and the U-shaped groove is connected with the upper and lower end surfaces of the lifting platform; a dumping cylinder is provided between the front inner wall of the U-shaped groove and the rear edge of the lower end surface of the collecting groove, one end of the cylinder bottom of the dumping cylinder is hinged to the front inner wall of the U-shaped groove, one end of the piston rod of the dumping cylinder is hinged to the rear edge of the lower end surface of the collecting groove, and the hinge axes at both ends of the dumping cylinder are horizontally arranged along the left and right directions.

[0016] The beneficial effects of the utility model compared with the prior art are:

[0017] The utility model provides a coal cleaning device for the tail of a scraper conveyor. A coal cleaning mechanism is provided at the rear end of the tail, the rear end of the tail is plugged into the cleaning box, and a collecting trough is provided at the rear end of the tail frame. The coal blocks that slide down during the operation of the scraper conveyor can be collected in the collecting trough. When the scraper conveyor stops running, the collecting trough can be lifted to the upper rear end of the supporting plate by operating the lifting cylinder, and the collecting trough can be controlled to be dumped by the dumping cylinder, so that the collected coal blocks are poured onto the supporting plate, and then the collecting trough is restored to the initial state, and the coal blocks dumped onto the supporting plate can be transported to the discharge port when the scraper conveyor is running again next time. In this way, it is no longer necessary to manually clean the coal blocks remaining at the tail, and only remote operation is required when the scraper conveyor stops, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model as a whole Figure 1 ;

[0020] Figure 2 It is a three-dimensional schematic diagram of the utility model as a whole Figure 2 ;

[0021] Figure 3 It is a three-dimensional schematic diagram of the tail of the aircraft;

[0022] Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A;

[0023] Figure 5 It is a schematic diagram of the structure of the collecting tank in the collecting state;

[0024] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0025] Figure 7 yes Figure 5Schematic side view of

[0026] Figure 8 It is a schematic diagram of the structure of the collecting tank when it moves to the highest state;

[0027] Fig. 9 yes Figure 8 lateral schematic diagram in;

[0028] Fig.10 is a schematic diagram of the structure of the collection tank after dumping;

[0029] Fig.11 yes Fig.10 Schematic side view of

[0030] Among them, 1 is the tail frame, 2 is the feed hopper, 3 is the bracket, 4 is the sprocket shaft, 5 is the driven sprocket, 6 is the chain, 7 is the scraper, 8 is the support plate, 9 is the cleaning box, 10 is the inspection door, 11 is the lifting cylinder, 12 is the lifting frame, 13 is the transverse rod, 14 is the longitudinal rod, 15 is the lifting platform, 16 is the collecting trough, 17 is the connecting rod, 18 is the U-shaped groove, and 19 is the dumping cylinder. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0032] like Figure 1 As shown in FIG. 11 , the utility model provides a coal cleaning device for the tail of a scraper conveyor, comprising a tail and a coal cleaning mechanism. The rear end of the tail is plugged into the coal cleaning mechanism, and the coal blocks scattered at the end of the tail are cleaned by the coal cleaning mechanism.

[0033] The tail comprises a tail frame 1 , a sprocket shaft 4 , a driven sprocket 5 , a chain 6 , a scraper 7 , a hopper 2 , a supporting plate 8 , and a bracket 3 .

[0034] The tail frame 1 is a square box structure extending front and back with the rear end kept open. A trumpet-shaped feeding hopper 2 is arranged in the middle of the upper end of the tail frame 1, and the coal blocks are input into the tail frame 1 through the feeding hopper 2; a row of brackets 3 are arranged at the lower end of the tail frame 1, and the row of brackets 3 are in contact with the ground, and the tail frame 1 is supported by the row of brackets 3.

[0035] A left and right horizontal sprocket shaft 4 is rotatably arranged at the rear end of the tail frame 1. The left and right ends of the sprocket shaft 4 are rotatably connected to the rear ends of the left and right inner walls of the tail frame 1 through bearing seats. A driven sprocket 5 is fixedly arranged at both ends of the sprocket shaft 4. The sprocket shaft 4 drives the driven sprockets 5 at both ends to rotate synchronously. Two left and right symmetrical driving sprockets are arranged at the head of the scraper conveyor. Two chains 6 are respectively sleeved between the driving sprockets and the driven sprockets 5 on both sides. The two driving sprockets drive the two driven sprockets 5 to rotate through the two chains 6.

[0036] A circle of equally spaced scrapers 7 is arranged between the two chains 6. The scrapers 7 are arranged along the left and right directions. The left and right ends of the scrapers 7 are respectively fixedly connected to the two chains 6. The scrapers 7 are driven to rotate in a circle by the two rotating chains 6. A supporting plate 8 is fixedly arranged inside the tail frame 1. The supporting plate 8 is located inside the circle of scrapers 7. The supporting plate 8 extends along the front-back direction. The scrapers 7 located on the upper side are in contact with the upper end surface of the supporting plate 8.

[0037] The coal cleaning mechanism comprises a cleaning box 9 , a lifting cylinder 11 , a lifting frame 12 , a connecting rod 17 , a lifting platform 15 , a collecting tank 16 , and a dumping cylinder 19 .

[0038] The cleaning box 9 is a square box structure, which is placed on the ground. A window is provided in the middle of the front side wall of the cleaning box 9. The rear end of the tail frame 1 extends into the cleaning box 9 through the window, and the upper end of the tail frame 1 extending into the cleaning box 9 remains open. An openable inspection door 10 is provided on the rear side wall and the top plate of the cleaning box 9.

[0039] A lifting cylinder 11 is arranged at the inner bottom surface of the cleaning box 9, the cylinder body of the lifting cylinder 11 is fixedly arranged on the inner bottom surface of the cleaning box 9, one end of the piston rod of the lifting cylinder 11 extends horizontally forward, and a lifting frame 12 is rotatably arranged at one end of the piston rod of the lifting cylinder 11. The lifting frame 12 is a U-shaped rod structure, including a transverse rod 13 and two longitudinal rods 14, the transverse rod 13 extends horizontally along the left and right direction, the longitudinal rod 14 is located in a vertical plane in the front and rear direction, the two ends of the transverse rod 13 are respectively fixedly connected to one end of the two longitudinal rods 14, and the middle part of the transverse rod 13 is rotatably inserted into the inner part of one end of the piston rod of the lifting cylinder 11.

[0040] A horizontal lifting platform 15 is arranged inside the cleaning box 9, and a collecting tank 16 is rotatably arranged on the upper end of the lifting platform 15. The front end of the lower end of the collecting tank 16 is hinged to the front end of the upper end of the lifting platform 15, and the hinge axis between the collecting tank 16 and the lifting platform 15 is arranged horizontally along the left and right direction. The collecting tank 16 is a square box structure with an upper end opening, and the upper end of the front side wall of the collecting tank 16 is inclined toward the front side. The upper end of the front side wall of the collecting tank 16 is connected to the rear end of the bottom plate of the tail frame 1, and the rear end of the bottom plate of the tail frame 1 is inclined downward; the left and right side end faces of the collecting tank 16 are in sliding contact with the lower edges of the rear ends of the inner walls of both sides of the tail frame 1, respectively.

[0041] A set of connecting rods 17 is arranged between the lifting platform 15 and the inner walls of the left and right sides of the cleaning box 9, and the two sets of connecting rods 17 are arranged symmetrically. Each set includes two front and rear connecting rods 17 parallel to each other, the lower ends of the two connecting rods 17 are hinged to the lifting platform 15, and the upper ends of the two connecting rods 17 are hinged to the inner wall of the cleaning box 9. The hinge axes at both ends of the front and rear connecting rods 17 are arranged horizontally along the left and right directions, and the hinge axes at the upper ends of the front and rear connecting rods 17 are located at the same height, and the hinge axes at the lower ends of the front and rear connecting rods 17 are located at the same height, so that a parallelogram structure is formed between the two connecting rods 17 of each set, the lifting platform 15, and the inner wall of the cleaning box 9.

[0042] The ends of the two longitudinal rods 14 of the lifting frame 12 away from the transverse rod 13 are respectively hinged to the middle of the connecting rods 17 on the front side of the two groups of connecting rods 17. At this time, the front end of the longitudinal rod 14 of the lifting frame 12 is located below the rear end of the longitudinal rod 14, and the piston rod of the lifting cylinder 11 is in an extended state.

[0043] A U-shaped groove 18 with an opening facing backward is provided in the middle of the rear end surface of the lifting platform 15, and the U-shaped groove 18 is connected with the upper and lower end surfaces of the lifting platform 15. A dumping cylinder 19 is provided between the front inner wall of the U-shaped groove 18 and the rear edge of the lower end surface of the collecting groove 16, and one end of the cylinder bottom of the dumping cylinder 19 is hinged to the front inner wall of the U-shaped groove 18, and one end of the piston rod of the dumping cylinder 19 is hinged to the rear edge of the lower end surface of the collecting groove 16, and the hinge axes at both ends of the dumping cylinder 19 are horizontally arranged along the left and right directions.

[0044] The working principle of the utility model is:

[0045] The coal blocks enter the supporting plate 8 inside the tail frame 1 through the feed hopper 2, and the head section of the scraper conveyor drives the active sprocket to rotate. The active sprocket drives the driven sprocket 5 to rotate through the chain 6. One circle of rotating chain 6 drives one circle of scraper 7 to rotate. The upper scraper 7 drives the coal blocks on the supporting plate 8 to be transported to the head section, and finally discharged from the discharge port at the head section.

[0046] During the operation of the scraper conveyor, coal blocks inevitably fall onto the inner bottom surface and the rear end of the tail frame 1. Since the rear end of the inner bottom surface of the tail frame 1 is tilted downward, the coal blocks on the inner bottom surface of the tail frame 1 are moved to the rear end of the tail frame 1 during the operation of the scraper conveyor.

[0047] The utility model provides a coal cleaning device, when the scraper conveyor is in working state, the collecting groove 16 is located at the rear end of the inner bottom surface of the tail frame 1, and the upper end of the front side wall of the collecting groove 16 is kept in contact with the rear end of the bottom plate of the tail frame 1, so that the coal blocks on the inner bottom surface of the tail frame 1 and the coal blocks at the driven sprocket 5 fall into the collecting groove 16.

[0048] When the scraper conveyor is finished working, a large amount of scattered coal is collected in the collecting tank 16. By controlling the piston rod of the lifting cylinder 11 to shrink, the transverse rod 13 of the lifting frame 12 is driven to move horizontally backward, and the longitudinal rod 14 of the lifting frame 12 drives the front connecting rod 17 in the left and right groups of connecting rods 17 to rotate, and the rear end of the front connecting rod 17 rotates upward, so that the lifting platform 15 and the collecting tank 16 also rotate upward. Since a parallelogram structure is formed between the two connecting rods 17 of each group, the lifting platform 15, and the inner wall of the cleaning box 9, it can be ensured that the lifting platform 15 and the collecting tank 16 are always in a horizontal state when rotating upward, and the coal collected in the collecting tank 16 will not be scattered.

[0049] In the two groups of connecting rods 17 , the two connecting rods 17 on the front side are located inside the two connecting rods 17 on the rear side, thereby ensuring that the two connecting rods 17 inside each group will not interfere with each other when rotating.

[0050] When the piston rod of the lifting cylinder 11 is retracted to the right position, the collecting tank 16 is lifted to the upper rear end of the supporting plate 8. At this time, the piston rod of the control dumping cylinder 19 is extended, driving the collecting tank 16 to be hinged around the front edge of the lifting platform 15, so that the rear end of the collecting tank 16 is gradually lifted upward, and the front side wall of the collecting tank 16 is gradually rotated downward, so that all the coal blocks in the collecting tank 16 slide onto the supporting plate 8.

[0051] Finally, the piston rod of the dumping cylinder 19 is controlled to retract, so that the collecting tank 16 returns to the horizontal position. Then the piston rod of the lifting cylinder 11 is controlled to extend, and the transverse rod 13 of the lifting frame 12 slides forward horizontally, and the longitudinal rod 14 of the lifting frame 12 drives the connecting rod 17 to rotate downward, and the connecting rod 17 drives the lifting platform 15 and the collecting tank 16 to rotate downward until the collecting tank 16 returns to the initial position, ready to collect the scattered coal blocks in the next scraper conveyor operation.

[0052] When the scraper conveyor runs again, the running scraper 7 transports the coal blocks that slide to the rear end of the supporting plate 8, thereby completely cleaning the processed coal blocks.

[0053] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A coal cleaning device for the tail of a scraper conveyor, characterized in that: The invention comprises a tail and a coal cleaning mechanism, wherein the coal cleaning mechanism comprises a cleaning box (9), wherein the rear end of the tail is plugged into the cleaning box (9), a horizontal lifting cylinder (11) is arranged at the bottom surface of the cleaning box (9), and a lifting frame (12) is rotatably arranged at one end of the piston rod of the lifting cylinder (11); a lifting platform (15) is also arranged inside the cleaning box (9), and a collecting trough (16) is rotatably arranged on the lifting platform (15), the collecting trough (16) is located at the rear end of the tail, and a dumping cylinder (19) is arranged between the collecting trough (16) and the lifting platform (15); a group of connecting rods (17) are arranged between the lifting platform (15) and the inner walls on both sides of the cleaning box (9), and the middle part of the connecting rod (17) is hinged to the lifting frame (12).

2. A coal cleaning device for the tail of a scraper conveyor according to claim 1, characterized in that: The tail of the machine comprises a tail frame (1), the tail frame (1) being a square box structure extending forward and backward and with the rear end kept open, a trumpet-shaped feeding hopper (2) being arranged in the middle of the upper end of the tail frame (1); and a row of brackets (3) being arranged at the lower end of the tail frame (1), the row of brackets (3) being in contact with the ground.

3. A coal cleaning device for the tail of a scraper conveyor according to claim 2, characterized in that: A left and right horizontal sprocket shaft (4) is rotatably arranged at the rear end of the tail frame (1), and the left and right ends of the sprocket shaft (4) are rotatably connected to the rear ends of the left and right inner walls of the tail frame (1) through bearing seats; a driven sprocket (5) is fixedly arranged at each end of the sprocket shaft (4); and two left and right symmetrical driving sprockets are arranged at the head of the scraper conveyor, and two chains (6) are respectively sleeved between the driving sprocket and the driven sprocket (5) on both sides.

4. A coal cleaning device for the tail of a scraper conveyor according to claim 3, characterized in that: A circle of equally spaced scrapers (7) is provided between the two chains (6), the scrapers (7) being provided in the left-right direction, and the left and right ends of the scrapers (7) being fixedly connected to the two chains (6) respectively; a support plate (8) is fixedly provided inside the tail frame (1), the support plate (8) being located on the inner side of the circle of scrapers (7), the support plate (8) extending in the front-rear direction, and the scrapers (7) located on the upper side being in contact with the upper end surface of the support plate (8).

5. A coal cleaning device for the tail of a scraper conveyor according to claim 4, characterized in that: The cleaning box (9) is a square box structure. The cleaning box (9) is placed on the ground. A window is provided in the middle of the front side wall of the cleaning box (9). The rear end of the tail frame (1) extends into the interior of the cleaning box (9) through the window. The upper end of the tail frame (1) extending into the interior of the cleaning box (9) remains open. Openable inspection doors (10) are provided on the rear side wall and the top plate of the cleaning box (9).

6. A coal cleaning device for the tail of a scraper conveyor according to claim 5, characterized in that: The cylinder body of the lifting cylinder (11) is fixedly arranged on the inner bottom surface of the cleaning box (9), and one end of the piston rod of the lifting cylinder (11) extends horizontally forward; the lifting frame (12) is a U-shaped rod structure, including a transverse rod (13) and two longitudinal rods (14), the two ends of the transverse rod (13) are respectively fixedly connected to one end of the two longitudinal rods (14), and the middle part of the transverse rod (13) is rotatably inserted into the inside of one end of the piston rod of the lifting cylinder (11).

7. A coal cleaning device for the tail of a scraper conveyor according to claim 6, characterized in that: The lifting platform (15) is kept horizontal, and the front end of the lower end face of the collecting trough (16) is hinged to the front end of the upper end face of the lifting platform (15); the collecting trough (16) is a square box structure with an open upper end, and the upper end of the front side wall of the collecting trough (16) is inclined toward the front side, and the upper end of the front side wall of the collecting trough (16) is kept in contact with the rear end of the bottom plate of the tail frame (1).

8. The coal cleaning device for the tail of a scraper conveyor according to claim 7, characterized in that: The two groups of connecting rods (17) are arranged symmetrically on the left and right; each group includes two front and rear connecting rods (17) parallel to each other, the lower ends of the two connecting rods (17) are hinged to the lifting platform (15), and the upper ends of the two connecting rods (17) are hinged to the inner wall of the cleaning box (9); the hinge axes at both ends of the front and rear connecting rods (17) are arranged horizontally along the left and right directions, and the hinge axes at the upper ends of the front and rear connecting rods (17) are located at the same height, and the hinge axes at the lower ends of the front and rear connecting rods (17) are located at the same height, so that a parallelogram structure is formed between the two connecting rods (17) of each group, the lifting platform (15), and the inner wall of the cleaning box (9).

9. A coal cleaning device for the tail of a scraper conveyor according to claim 8, characterized in that: The ends of the two longitudinal rods (14) of the lifting frame (12) away from the transverse rod (13) are respectively hinged to the middle of the connecting rods (17) at the front sides of the two sets of connecting rods (17). At this time, the front ends of the longitudinal rods (14) of the lifting frame (12) are located below the rear ends of the longitudinal rods (14), and the piston rod of the lifting cylinder (11) is in an extended state.

10. A coal cleaning device for the tail of a scraper conveyor according to claim 9, characterized in that: A U-shaped groove (18) opening backwards is provided in the middle of the rear end surface of the lifting platform (15), and the U-shaped groove (18) is connected to the upper and lower end surfaces of the lifting platform (15); a dumping cylinder (19) is provided between the front inner wall of the U-shaped groove (18) and the rear edge of the lower end surface of the collecting groove (16); one end of the cylinder bottom of the dumping cylinder (19) is hinged to the front inner wall of the U-shaped groove (18), one end of the piston rod of the dumping cylinder (19) is hinged to the rear edge of the lower end surface of the collecting groove (16), and the hinge axes at both ends of the dumping cylinder (19) are horizontally arranged along the left and right directions.

Images