Coal cleaning device for cleaning coal accumulated at bottom of belt conveyor

Abstract

The utility model relates to the technical field of accumulated coal cleaning devices, in particular to a coal cleaning device for cleaning accumulated coal at the bottom of a belt conveyor, which comprises a track, a coal cleaning device and a coal cleaning device, and is characterized in that the track is arranged at the bottom of a conveying belt of the belt conveyor along the length direction of the belt conveyor; the coal cleaning vehicle is movably arranged on the track; the coal cleaning scraper is rotationally arranged at the bottom of the coal cleaning vehicle in the width direction of the track in a limiting manner; the traction plate is arranged at the upper part of the coal cleaning vehicle in a limiting and sliding manner along the length direction of the track, is vertically arranged at the upper part of the coal cleaning scraper and is movably connected with the coal cleaning scraper; the limiting mechanism is arranged between the coal cleaning scraper blade and the traction plate and is used for limiting the sliding displacement of the traction plate and the rotating angle of the coal cleaning scraper blade; and the driving mechanism is connected with the traction plate and is used for driving the traction plate to slide forwards or reversely so as to drive the coal cleaning scraper to rotate forwards or reversely, so that the coal cleaning vehicle is switched between a load state and a no-load state. The problems that the existing accumulated coal cleaning efficiency is low and the cleaning mode is not flexible are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of coal cleaning devices, and in particular to a coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor. Background Technology

[0002] The storage and transportation system is a crucial component of the coal preparation plant's production system, responsible for the storage, transfer, and transportation of raw coal, marketable coal, and gangue. Transportation equipment in coal preparation plants includes belt conveyors, scraper conveyors, chutes, and elevators. Belt conveyors, with their advantages of large capacity, high safety, strong stability, low operating costs, and long transportation distances, have become commonly used transportation equipment in coal preparation plants.

[0003] During the operation of belt conveyors, coal often accumulates at the bottom due to factors such as belt misalignment, uneven load, and failure to promptly remove coal adhering to the belt. Coal preparation plants typically clean this coal manually, but due to limited working space, this method is difficult, inefficient, and yields unsatisfactory results. Ineffective coal removal not only affects the aesthetics of the work area but also easily wears down the conveyor belt or clogs the idlers, shortening their lifespan and even potentially causing a fire and resulting in a safety accident. Utility Model Content

[0004] To address at least one of the aforementioned technical problems, this utility model proposes a coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor, which solves the problems of low cleaning efficiency and inflexible cleaning methods in existing coal cleaning methods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor, comprising:

[0007] A track is provided at the bottom of the conveyor belt of the belt conveyor along the length direction of the belt conveyor;

[0008] The coal cleaning car is mounted on the track.

[0009] A coal cleaning scraper is rotatably mounted at the bottom of the coal cleaning car along the width of the track.

[0010] A traction plate is slidably and limitedly disposed on the upper part of the coal cleaning car along the length direction of the track, and the traction plate is vertically disposed on the upper part of the coal cleaning scraper and movably connected to the coal cleaning scraper;

[0011] A limiting mechanism is provided between the coal cleaning scraper and the traction plate to limit the sliding displacement of the traction plate and the rotation angle of the coal cleaning scraper.

[0012] The drive mechanism, connected to the traction plate, is used to drive the traction plate to slide forward or backward to drive the coal cleaning scraper to rotate forward or backward, so that the coal cleaning car can switch between a loaded state and an unloaded state.

[0013] Preferably, the coal cleaning scraper includes a cleaning plate and a baffle at a first angle to the cleaning plate, and a concave groove for accommodating accumulated coal is formed between the cleaning plate and the baffle; the two ends of the concave groove are provided with rotating shafts that are rotatably connected to the coal cleaning car.

[0014] Preferably, the first angle is 105°-135°, and both the baffle and the cleaning plate are made of polyurethane.

[0015] Preferably, the traction plate includes a connecting section and traction sections disposed at both ends of the connecting section. The coal cleaning car is provided with chutes at both ends. The traction plate is slidably disposed in the chutes and the traction section located outside the chutes is provided with a traction hole to facilitate connection of the drive mechanism. The connecting section is symmetrically provided with first limiting members for limiting the sliding displacement of the traction plate. The distance between the two first limiting members is adjustable.

[0016] Preferably, the first limiting member is disposed on the upper part of the connecting section along the width direction of the traction plate and located between the two sliding grooves. The first limiting member is a limiting rod or a limiting plate. The width of the sliding groove is greater than the width of the connecting section and less than the length of the first limiting member.

[0017] Preferably, the limiting mechanism includes a rotating member fixed parallel to the upper part of the baffle and a second limiting member arranged parallel to the upper part of the connecting section and parallel to the first limiting member, and the distance between the two second limiting members is adjustable;

[0018] The rotating component is located on both sides of the first connecting section and between the two second limiting components. The length of the second limiting component is greater than the distance between the two rotating components, and the end of the rotating component away from the baffle is higher than the second limiting component.

[0019] Preferably, the drive mechanism includes:

[0020] Electric motor;

[0021] The speed reducer, wherein the output shaft of the motor and the input shaft of the speed reducer are coaxially connected via a coupling;

[0022] The drive roller is connected to the output shaft of the reducer via a coupling, and the surface of the drive roller is provided with parallel left and right annular grooves.

[0023] A fixed pulley is mounted on the tail of the belt conveyor via a bracket;

[0024] The positive traction rope has its fixed end fixed to the left annular groove, and its free end wrapped around the left annular groove in the positive direction and connected to the traction hole located at the machine head.

[0025] The negative traction rope has its fixed end fixed to the right annular groove, and its free end wrapped around the right annular groove in the opposite direction before passing through the fixed pulley at the tail of the machine and connecting to the traction hole at the tail of the machine.

[0026] Preferably, the coal cleaning car includes:

[0027] The vehicle body is located between the tracks;

[0028] The traveling wheels are used to move and support the coal cleaning car. They are symmetrically arranged on both sides of the car body and are in contact with the running surface of the track.

[0029] The limiting wheels are used to guide the movement of the coal cleaning car. The limiting wheels are symmetrically arranged on both sides of the car body and contact the side of the track.

[0030] Preferably, the vehicle body includes:

[0031] The longitudinal beams are arranged symmetrically and parallel to each other between the tracks. The two ends of the longitudinal beams are provided with wedge-shaped surfaces to facilitate the guidance of accumulated coal to the coal cleaning scraper. The wedge-shaped surfaces are perpendicular to the plane containing the upper surface of the longitudinal beams.

[0032] A crossbeam is arranged symmetrically and parallel to the longitudinal beams, and both ends of the crossbeam are fixed perpendicularly to the longitudinal beams.

[0033] The mounting beam is parallel to the longitudinal beam and is fixedly connected to the upper part of both the longitudinal beam and the transverse beam; the traveling wheel and the limiting wheel are rotatably mounted on the mounting beam.

[0034] A reinforcing beam is parallel to the longitudinal beam and / or the mounting beam and is located between the mounting beams, with both ends of the reinforcing beam being fixed perpendicularly to the two crossbeams respectively.

[0035] Preferably, multiple limit switches connected to the control system are provided at both ends of the track and at intervals in the middle of the track for positioning and reversing control of the coal cleaning car. The limit switches divide the track into several coal cleaning sections.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention features a limiting mechanism between the coal cleaning scraper and the traction plate. Under the action of the driving mechanism, the traction plate slides forward or backward, thereby driving the coal cleaning scraper to rotate forward or backward. This allows the coal cleaning car to move from the head to the tail of the machine. The bottom of the coal cleaning scraper rotates and rises away from the coal accumulation surface, which effectively prevents the accumulated coal from being carried back to the tail of the machine compared to a fixed scraper. When the coal cleaning car moves from the tail to the head of the machine, the bottom of the coal cleaning scraper rotates and lowers to contact the coal accumulation surface for cleaning. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor;

[0039] Figure 2 A top view of a coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor;

[0040] Figure 3 This is a schematic diagram of the structure of the coal cleaning car in this utility model;

[0041] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0042] Figure 5 This is a front view of the coal cleaning car in this utility model;

[0043] Figure 6 This is a schematic diagram of the coal cleaning car under no-load conditions (coal cleaning scraper rotates and lifts) in this utility model;

[0044] Figure 7 This is a schematic diagram of the load on the coal cleaning car (coal cleaning scraper rotates and lowers) in this utility model;

[0045] In the diagram: 10. Track;

[0046] 20. Coal cleaning car; 201. Car body; 2011. Longitudinal beam; 20111. Wedge-shaped surface; 2012. Crossbeam; 20121. Slide groove; 2013. Mounting beam; 2014. Reinforcing beam; 202. Traveling wheel; 203. Limiting wheel;

[0047] 30. Coal cleaning scraper; 301. Cleaning plate; 302. Baffle; 303. Rotating shaft;

[0048] 40. Traction plate; 401. Connecting section; 402. Traction section; 4021. Pulling hole; 403. First limiting component;

[0049] 50. Limiting mechanism; 501. Rotating component; 502. Second limiting component. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions in this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this utility model, and not all of the embodiments in this utility model.

[0051] Please refer to Figures 1-7 As shown, a coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor includes:

[0052] Track 10 is installed at the bottom of the conveyor belt along the length of the belt conveyor;

[0053] The coal cleaning car 20 is mounted on track 10.

[0054] The coal cleaning scraper 30 is rotatably limited along the width direction of the track 10 and is located at the bottom of the coal cleaning car 20;

[0055] The traction plate 40 is slidably mounted on the upper part of the coal cleaning car 20 along the length of the track 10, and the traction plate 40 is vertically mounted on the upper part of the coal cleaning scraper 30 and is movably connected to the coal cleaning scraper 30.

[0056] The limiting mechanism 50 is located between the coal cleaning scraper 30 and the traction plate 40 to limit the sliding displacement of the traction plate 40 and the rotation angle of the coal cleaning scraper 30.

[0057] The drive mechanism, connected to the traction plate 40, is used to drive the traction plate 40 to slide forward or backward to drive the coal cleaning scraper 30 to rotate forward or backward, so that the coal cleaning car 20 can switch between a loaded state and an unloaded state.

[0058] In this embodiment, a limiting mechanism 50 is set between the coal cleaning scraper 30 and the traction plate 40. Under the action of the driving mechanism, the traction plate 40 slides forward or backward, thereby driving the coal cleaning scraper 30 to rotate forward or backward. This allows the coal cleaning car 20 to run from the head to the tail of the machine. The bottom of the coal cleaning scraper 30 rotates and rises away from the coal accumulation surface. Compared with a fixed scraper, this can effectively prevent the accumulated coal from being carried back to the tail of the machine. When the coal cleaning car 20 runs from the tail to the head of the machine, the bottom of the coal cleaning scraper 30 rotates and lowers to contact the coal accumulation surface, thus cleaning the accumulated coal.

[0059] It should be noted that, given the humid and dusty environment during coal cleaning, the coal cleaning scraper 30 in this embodiment is made of polyurethane. Polyurethane's high wear resistance and elasticity reduce rigid contact between the scraper 30 and the coal cleaning surface, extending the service life of the scraper 30. Simultaneously, the smooth surface of the polyurethane material significantly reduces coal adhesion to the scraper 30 during the cleaning process.

[0060] Please refer to Figure 3and Figure 5 As shown, the coal cleaning car 20 includes:

[0061] Car body 201 is located between tracks 10;

[0062] The traveling wheels 202 are used to move the coal cleaning car 20. They are symmetrically arranged on both sides of the car body 201 and are in contact with the running surface of the track 10.

[0063] The limiting wheel 203 is used to guide the movement of the coal cleaning car 20. The limiting wheel 203 is symmetrically arranged on both sides of the car body 201 and contacts the side of the track 10.

[0064] It should be noted that, considering that the coal cleaning car 20 needs to move back and forth on the track 10, and that the load is large when cleaning up the accumulated coal, resulting in significant wear on the track 10, the track 10 in this embodiment is made of channel steel with the openings of the channel steel facing opposite directions, i.e., all openings facing the coal cleaning car 20, to facilitate the installation of the following traveling wheels 202 and limiting wheels 203.

[0065] In this embodiment, by setting the traveling wheels 202 and the limiting wheels 203 on the car body 201, the coal cleaning car 20 not only has sufficient load capacity, but also can effectively avoid the problem of deviation or derailment during the reciprocating movement along the track 10, thus ensuring the safety and stability of the operation of the coal cleaning car 20.

[0066] It should be noted that in this embodiment, there are four traveling wheels 202 and four limiting wheels 203, all made of polyurethane. Specifically, two traveling wheels 202 and two limiting wheels 203 are installed on each side of the mounting beam 2013. The two limiting wheels 203 are rotatably mounted on both ends of the mounting beam 2013 via mounting brackets, and two positioning wheels are spaced apart between the limiting wheels 203. It is understood that the traveling wheels 202 in this example can also be installed on the longitudinal beam 2011. The structure of the mounting brackets for the limiting wheels 203 and the traveling wheels 202 is prior art and will not be described in detail here.

[0067] Please refer to Figures 1-3 As shown, in this embodiment, the vehicle body 201 includes:

[0068] The longitudinal beams 2011 are arranged symmetrically and parallel to the tracks 10. At both ends of the longitudinal beams 2011, there are wedge-shaped surfaces 20111 to facilitate the guidance of accumulated coal to the coal cleaning scraper 30. The wedge-shaped surfaces 20111 are perpendicular to the plane containing the upper surface of the longitudinal beams 2011. The angle of the wedge-shaped surfaces 20111 can be between 30° and 60°.

[0069] The crossbeam 2012 is arranged symmetrically and parallelly between the longitudinal beams 2011, and both ends of the crossbeam 2012 are fixed perpendicularly to the longitudinal beams 2011.

[0070] Mounting beam 2013 is parallel to longitudinal beam 2011 and is fixedly connected to the upper part of both longitudinal beam 2011 and crossbeam 2012. Traveling wheels 202 and limiting wheels 203 are rotatably mounted on mounting beam 2013. The function of mounting beam 2013 is to reinforce the connection between crossbeam 2012 and longitudinal beam 2011, thereby improving the structural strength of the coal cleaning car 20 frame formed by the crossbeams 2012 and 2011 and enhancing the stability of the coal cleaning car 20 during use.

[0071] A reinforcing beam 2014 is parallel to the longitudinal beam 2011 and / or the mounting beam 2013, and is located between the mounting beams 2013. Both ends of the reinforcing beam 2014 are perpendicularly fixed to two transverse beams 2012. In this embodiment, there are two reinforcing beams 2014. Obviously, the number of reinforcing beams 2014 can be determined according to actual needs, and this application does not impose any limitation.

[0072] Please refer to Figure 1 , Figure 6 and Figure 7 As shown, the aforementioned coal cleaning scraper 30 includes a cleaning plate 301 and a baffle 302 at a first angle to the cleaning plate 301. A concave groove for accommodating accumulated coal is formed between the cleaning plate 301 and the baffle 302. Rotating shafts 303 that are rotatably connected to the coal cleaning car 20 are provided at both ends of the concave groove.

[0073] Understandably, to prevent coal from falling onto the rear side of the cleaning scraper 30 along the upper part of the baffle 302, in this embodiment, it is preferable that the baffle 302 be in a vertical or forward-tilted state when the cleaning scraper 30 is cleaning the coal. At this time, the concave groove can accommodate a large amount of coal and also generate a horizontal or downward thrust on the coal within the concave groove, thereby allowing the coal to gather and accumulate in front of the cleaning scraper 30. In this embodiment, the first angle is 105°-135°. When the baffle 302 is in a vertical state, the angle between the cleaning plate 301 and the coal accumulation surface is 15°-45°, which also ensures that the cleaning plate 301 has a good cleaning effect.

[0074] In this embodiment, the concave groove is a V-shaped groove. Of course, in order to facilitate the cleaning of the coal residue adhering to the bottom of the V-shaped groove, the bottom of the V-shaped groove can be set to an arc shape.

[0075] Please refer to Figures 1-3As shown, the traction plate 40 includes a connecting section 401 and traction sections 402 disposed at both ends of the connecting section 401. The coal cleaning car 20 is provided with a chute 20121 at both ends. The traction plate 40 is slidably disposed in the chute 20121 and the traction section 402 located outside the chute 20121 is provided with a traction hole 4021 for easy connection of the drive mechanism. The connecting section 401 is symmetrically provided with first limiting members 403 for limiting the sliding displacement of the traction plate 40. The distance between the two first limiting members 403 is adjustable.

[0076] It should be noted that in this embodiment, the chute 20121 is located in the middle of the upper part of the crossbeam 2012. Specifically, the chute 20121 is formed by setting a channel steel on the upper part of the crossbeam 2012, with the opening of the channel steel facing the upper part of the crossbeam 2012. That is, the accommodating space between the channel steel and the crossbeam 2012 forms the chute 20121. It can be understood that the width and height of the chute 20121 can be adaptively adjusted by adjusting the specific specifications of the channel steel. In this embodiment, both ends of the traction section 402 are set as semi-circular.

[0077] In order to achieve a good limiting effect, in this embodiment, the first limiting member 403 is disposed on the upper part of the connecting section 401 along the width direction of the traction plate 40 and located between the two sliding grooves 20121. The width of the sliding groove 20121 is greater than the width of the connecting section 401 and less than the length of the first limiting member 403.

[0078] Please refer to Figure 3 and Figure 4 As shown, the limiting mechanism 50 includes a rotating member 501 that is fixed parallel to the upper part of the baffle 302 at intervals, and a second limiting member 502 that is parallel to the upper part of the connecting section 401 and parallel to the first limiting member 403. The distance between the two second limiting members 502 is adjustable.

[0079] The rotating member 501 is located on both sides of the first connecting section 401 and between the two second limiting members 502. The length of the second limiting member 502 is greater than the distance between the two rotating members 501. The end of the rotating member 501 away from the baffle 302 is higher than the second limiting member 502.

[0080] In this embodiment, the cooperation between the limiting mechanism 50 and the first limiting member 403 allows the traction plate 40 to slide towards the tail of the machine as the coal cleaning car 20 moves from the head to the tail, causing the coal cleaning scraper 30 to rotate and rise. Conversely, when the coal cleaning car 20 moves from the tail to the head of the machine, the traction plate 40 slides towards the head, causing the coal cleaning scraper 30 to rotate and lower.

[0081] Considering that different coal cleaning scrapers 30 may need to be replaced depending on the specific coal cleaning requirements, this embodiment incorporates an adjustable first limiting member 403 and a second limiting member 502, allowing for adjustment of both the sliding displacement of the traction plate 40 and the corresponding rotation angle of the coal cleaning scraper 30. This enables the use of coal cleaning scrapers 30 with different cleaning angles to be met. Here, the cleaning angle should be understood as the angle between the cleaning plate 301 and the coal accumulation surface (ground).

[0082] It should be noted that in this embodiment, the first limiting member 403 and the second limiting member 502 can be a limiting rod or a limiting plate. To facilitate distance adjustment, multiple sets of adjusting holes are provided at intervals along the length of the traction plate 40 in this embodiment. Each set of adjusting holes includes at least two adjusting holes provided along the width of the traction plate 40. At the same time, the lower part of the first limiting member 403 and the second limiting member 502 is provided with a screw adapted to the adjusting hole, and the first limiting member 403 and the second limiting member 502 are fixed in the corresponding adjusting hole on the traction plate 40 by a nut.

[0083] In this embodiment, the aforementioned drive mechanism (not shown in the figure) includes:

[0084] Electric motor;

[0085] The output shaft of the speed reducer and the input shaft of the motor are coaxially connected via a coupling.

[0086] The drive roller is connected to the output shaft of the reducer via a coupling, and parallel left and right annular grooves are formed on the surface of the drive roller.

[0087] A fixed pulley is mounted on the tail of the belt conveyor via a bracket;

[0088] The positive traction rope has its fixed end fixed to the left annular groove, and its free end wrapped around the left annular groove in the positive direction and connected to the traction hole located at the machine head.

[0089] The negative traction rope has its fixed end fixed to the right annular groove, and its free end wrapped around the right annular groove in the opposite direction before passing through the fixed pulley at the tail of the machine and connecting to the traction hole at the tail of the machine.

[0090] In this embodiment, a single-motor double-rope pulley (not shown in the figure) is used. Traction ropes with different winding directions are connected to both ends of the traction plate 40. When the motor rotates, it drives the transmission roller to rotate. One traction rope performs a winding action, providing tension to the traction plate 40, while the other traction rope unwinds synchronously, without obstructing the movement of the coal cleaning car 20. Therefore, controlling the forward and reverse rotation of the motor enables the coal cleaning car 20 to reciprocate along the track 10, achieving the purpose of repeated coal cleaning. A fixed pulley at the tail ensures that the traction rope remains parallel to the track 10 during the movement of the coal cleaning car 20, thus ensuring that the traction force is fully used to provide tension to the coal cleaning car 20. This also avoids interference between the traction rope and other components of the belt conveyor, reducing wear on the traction rope.

[0091] It should be noted that the aforementioned electric motor, reducer, transmission roller, and double-rope structure, usage method, and working principle are existing technologies, and will not be described in detail here.

[0092] Understandably, in actual operation, the purpose of reciprocating coal cleaning of the coal cleaning car 20 can also be achieved by setting electric motors and traction ropes at both ends of the belt conveyor.

[0093] Depending on the amount of coal accumulated, in order to facilitate segmented cleaning, in this embodiment, multiple limit switches connected to the control system are provided at both ends of the track 10 and at intervals in the middle of the track 10. These limit switches are used for positioning and reversing control of the coal cleaning car 20. The limit switches divide the track 10 into several coal cleaning segments.

[0094] It should be noted that the coal cleaning device in this embodiment can be manually controlled or automatically controlled through a PLC control system.

[0095] Specifically, in automatic control mode, the coal cleaning car 20 initially moves towards the head of the belt conveyor. Once the coal cleaning car 20 reaches its static parking position at the head of the conveyor, a timer begins (the time can be preset as needed). After the preset time is reached, the coal cleaning car 20 moves towards the tail of the conveyor, and the coal cleaning scraper 30 rotates and lifts, as... Figure 6 As shown; when the coal cleaning car 20 reaches the limit switch of the first stop, it stops running and pauses for 5 seconds. The coal cleaning car 20 then moves towards the machine head, and the coal cleaning scraper 30 rotates and lowers, as shown. Figure 7 As shown, the first stage of coal cleaning work begins.

[0096] After the coal cleaning car 20 reaches the head limit switch, it stops and pauses for 5 seconds. The coal cleaning car 20 then moves towards the tail of the machine, and the coal cleaning scraper 30 rotates and rises. When it reaches the second-stage limit switch, it stops and pauses for 5 seconds. The coal cleaning car 20 then moves towards the head of the machine, and the coal cleaning scraper 30 rotates and lowers, beginning the second stage of coal cleaning. It stops again when it reaches the head limit switch.

[0097] This process continues until the coal cleaning car 20 reaches the tail limit switch, completing the final stage of coal cleaning. It then stops at the static parking position and begins timing, preparing for the next stage of coal cleaning.

[0098] It should be noted that the connection method and control principle between the PLC control system and the motor and limit switch are existing technologies, and will not be described in detail here.

[0099] When the coal accumulation is thick, manual control can be used. Specifically, the operator starts the motor according to the coal accumulation situation. Under the traction of the traction rope, the coal cleaning car 20 moves from the head of the machine to a suitable position (which can be a position in the middle of the track 10 or the tail position). Then, the operator controls the motor to reverse, and the coal accumulation is pushed to the auxiliary chute at the head of the machine by the coal cleaning scraper 30 and sent to the downstream belt conveyor. The above steps are repeated until the coal accumulation is completely cleared.

[0100] Taking the coal accumulation at the bottom of a 30m long and 1.90m wide 303 belt conveyor as an example, it used to require manual cleaning once a day, with each cleaning requiring two people working for two hours. Using this device to clean the coal accumulation, each operation only takes 5 minutes, and each work cycle only takes 15 minutes. The cleaning efficiency and quality are significantly better than manual cleaning.

[0101] The coal cleaning device provided by this utility model has a simple structure, is easy to operate, has a flexible coal cleaning method, and has high cleaning efficiency.

[0102] The above description is a specific implementation of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A coal cleaning device for cleaning coal accumulated at the bottom of a belt conveyor, characterized in that, include: Track (10) is provided at the bottom of the conveyor belt of the belt conveyor along the length direction of the belt conveyor; The coal cleaning car (20) is moved and set on the track (10); A coal cleaning scraper (30) is rotatably mounted at the bottom of the coal cleaning car (20) along the width direction of the track (10); The traction plate (40) is slidably mounted on the upper part of the coal cleaning car (20) along the length direction of the track (10), and the traction plate (40) is vertically mounted on the upper part of the coal cleaning scraper (30) and is movably connected to the coal cleaning scraper (30); A limiting mechanism (50) is provided between the coal cleaning scraper (30) and the traction plate (40) to limit the sliding displacement of the traction plate (40) and the rotation angle of the coal cleaning scraper (30); The drive mechanism is connected to the traction plate (40) and is used to drive the traction plate (40) to slide forward or backward to drive the coal cleaning scraper (30) to rotate forward or backward, so that the coal cleaning car (20) can switch between a loaded state and an unloaded state.

2. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 1, characterized in that, The coal cleaning scraper (30) includes a cleaning plate (301) and a baffle (302) at a first angle to the cleaning plate (301). A concave groove for accommodating accumulated coal is formed between the cleaning plate (301) and the baffle (302). Rotating shafts (303) that are rotatably connected to the coal cleaning car (20) are provided at both ends of the concave groove.

3. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 2, characterized in that, The first angle is 105°-135°, and both the baffle (302) and the cleaning plate (301) are made of polyurethane.

4. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 3, characterized in that, The traction plate (40) includes a connecting section (401) and traction sections (402) disposed at both ends of the connecting section (401). The coal cleaning car (20) is provided with a chute (20121) at both ends. The traction plate (40) is slidably disposed in the chute (20121) and the traction section (402) located outside the chute (20121) is provided with a traction hole (4021) to facilitate connection of the drive mechanism. The connecting section (401) is symmetrically provided with first limiting members (403) at both ends for limiting the sliding displacement of the traction plate (40). The distance between the two first limiting members (403) is adjustable.

5. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 4, characterized in that, The first limiting member (403) is disposed on the upper part of the connecting section (401) along the width direction of the traction plate (40) and located between the two slides (20121). The first limiting member (403) is a limiting rod or a limiting plate. The width of the slide (20121) is greater than the width of the connecting section (401) and less than the length of the first limiting member (403).

6. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 5, characterized in that, The limiting mechanism (50) includes a rotating member (501) fixed parallel to the upper part of the baffle (302) at intervals and a second limiting member (502) arranged parallel to the upper part of the connecting section (401) and parallel to the first limiting member (403). The distance between the two second limiting members (502) is adjustable. The rotating member (501) is located on both sides of the connecting section (401) and between the two second limiting members (502). The length of the second limiting member (502) is greater than the distance between the two rotating members (501). The end of the rotating member (501) away from the baffle (302) is higher than the second limiting member (502).

7. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 4, characterized in that, The drive mechanism includes: Electric motor; The speed reducer, wherein the output shaft of the motor and the input shaft of the speed reducer are coaxially connected via a coupling; The drive roller is connected to the output shaft of the reducer via a coupling, and the surface of the drive roller is provided with parallel left and right annular grooves. A fixed pulley is mounted on the tail of the belt conveyor via a bracket; The positive traction rope has its fixed end fixed to the left annular groove, and its free end wrapped around the left annular groove in the positive direction and connected to the traction hole located at the machine head. The negative traction rope has its fixed end fixed to the right annular groove, and its free end wrapped around the right annular groove in the opposite direction before passing through the fixed pulley at the tail of the machine and connecting to the traction hole at the tail of the machine.

8. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to any one of claims 1-7, characterized in that, The coal cleaning car (20) includes: The vehicle body (201) is located between the tracks (10); The traveling wheels (202) are used to move and carry the coal cleaning car (20). They are symmetrically arranged on both sides of the car body (201). The traveling wheels (202) are in contact with the running surface of the track (10). The limiting wheel (203) is used to guide the movement of the coal cleaning car (20). The limiting wheel (203) is symmetrically arranged on both sides of the car body (201) and the limiting wheel (203) is in contact with the side of the track (10).

9. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 8, characterized in that, The vehicle body (201) includes: The longitudinal beam (2011) is arranged in parallel and symmetrically between the tracks (10). The two ends of the longitudinal beam (2011) are provided with wedge-shaped surfaces (20111) to facilitate guiding the accumulated coal to the coal cleaning scraper (30). The wedge-shaped surfaces (20111) are perpendicular to the plane on which the upper surface of the longitudinal beam (2011) is located. A crossbeam (2012) is arranged symmetrically and parallel to the longitudinal beams (2011), and both ends of the crossbeam (2012) are fixed perpendicularly to the longitudinal beams (2011); The mounting beam (2013) is parallel to the longitudinal beam (2011), and the mounting beam (2013) is fixedly connected to the upper part of both the longitudinal beam (2011) and the cross beam (2012); the traveling wheel (202) and the limiting wheel (203) are rotatably mounted on the mounting beam (2013); A reinforcing beam (2014) is parallel to the longitudinal beam (2011) and / or the mounting beam (2013) and is located between the mounting beams (2013). The two ends of the reinforcing beam (2014) are respectively fixed perpendicularly to the two crossbeams (2012).

10. The coal cleaning device for cleaning coal accumulation at the bottom of a belt conveyor according to claim 1, characterized in that, Multiple limit switches connected to the control system are provided at both ends of the track (10) and at intervals in the middle of the track (10) for positioning and reversing control of the coal cleaning car (20). The limit switches divide the track (10) into several coal cleaning sections.

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