Belt conveyor cleaning device without damaging belt

Abstract

A belt conveyor cleaning device without damaging a belt belongs to the technical field of belt conveyor equipment and is used for cleaning the belt of a belt conveyor. According to the technical scheme, a bottom beam is a long steel beam, two mounting plates are fixedly welded to the two ends of the bottom beam, fixing bolts fixedly connect the two mounting plates with a rack below a return belt of the belt conveyor through mounting holes, an air tool bit is composed of a base and a tool bit body, the base is placed on the bottom beam, the bottom face of the base is connected with the bottom beam, and the tool bit body is arranged on the base. The tool bit of the air tool bit is a rectangular box body, the bottom face of the box body is fixedly connected to the upper top face of the base, the top face of the box body is provided with a slit in the length direction of the box body, the slit is opposite to the lower surface of a return belt of the belt conveyor, and an air inlet hole is formed in the lower portion of the side wall of the box body and connected with an air outlet of a compressed air pipeline. Impurities on the surface layer of the belt are removed in an air blowing mode, abrasion of the belt is avoided, adaptability to the belt is good, and cleaning quality is high.

Description

Technical Field

[0001] The utility model relates to a belt cleaning device for a belt conveyor, belonging to the technical field of belt conveyor equipment. Background Art

[0002] A belt conveyor is an important device for transporting raw materials and bulk goods in mines, ports, docks, stations, construction sites, and large industrial and mining enterprises. During the conveying process of the belt conveyor, some conveyed materials will adhere to the surface of the belt, affecting the normal use of the belt conveyor. Therefore, it is necessary to install a belt cleaning device to remove the materials adhering to the surface of the belt.

[0003] Generally, the belt cleaning device is installed below the starting point of the return belt to clean the surface of the return belt. Currently, the most commonly used belt cleaning device is to install a cutter head or a scraper below the return belt. When the return belt is running, the cutter head or the scraper contacts the surface of the return belt to scrape off the materials on the belt surface. The cutter head or the scraper is fixed on the frame of the belt conveyor below the return belt by a bracket, a support, etc., and a torque adjustment device is installed to dynamically adjust the contact force between the cleaning cutter head and the belt to avoid poor contact between the cutter head and the belt after wear.

[0004] It is found in use that this kind of belt cleaning device using a cutter head or a scraper has the following disadvantages:

[0005] First of all, since the cutter head or the scraper scrapes off the materials by hard contact with the belt surface, it will cause wear to the belt. Taking a common steel wire belt as an example, the thickness of the rubber layer on the load-bearing surface is 8 mm. When the cleaning torque is large, the wear of the belt is serious. After a certain number of cleaning times, the steel wire of the belt is exposed and cannot be used. Secondly, this cleaning structure does not protect the idler well. When the cleaning torque is small, the cleaning quality is poor, resulting in the materials falling on the return belt and covering the idler. At the same time, due to environmental protection requirements, after the sprinkler dust removal is put into use, the materials will contain a certain amount of moisture, and they will accumulate and freeze at the return idler in the northern winter. The above two situations are very likely to cause the idler to be stuck and stop rotating, and be scrapped due to friction with the belt. Moreover, the maintenance workload of this cleaning device is large. The cutter head or the scraper of this cleaning device wears quickly due to continuous work. One belt uses 2-3 cleaning devices, and it needs to be adjusted once a month on average, which requires a large number of personnel and working hours, resulting in an increase in maintenance costs. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a belt conveyor cleaning device that does not damage the belt. This cleaning device uses the air blowing-off method to remove the impurities on the belt surface, will not cause belt wear, and the belt joint, belt jitter, and lateral arc do not affect the cleaning effect. It has good adaptability to the belt, high cleaning quality, can reduce the maintenance workload, and lower the production cost.

[0007] The technical solution for solving the above technical problems is as follows:

[0008] A belt conveyor cleaning device that does not damage the belt, which includes a base and an air knife head. The base is composed of a bottom beam and mounting plates. The bottom beam is a steel long beam, and the length of the bottom beam matches the width of the belt conveyor. The mounting plates are square steel plates. Two mounting plates are fixedly welded to both ends of the bottom beam. There are mounting holes on the mounting plates. Fixing bolts pass through the mounting holes to fixedly connect the two mounting plates with the frame under the return belt of the belt conveyor. The length direction of the bottom beam is perpendicular to the belt running direction. The air knife head is composed of a base and a knife head. The base is a cuboid steel block, and the length of the base of the air knife head matches the length of the bottom beam of the base. The base is placed on the bottom beam, and the bottom surface of the base is connected to the bottom beam. The knife head of the air knife head is a rectangular box body. The length and thickness of the box body respectively match the length and thickness of the base. The bottom surface of the box body is fixedly connected to the upper top surface of the base. There is a slit along the length direction on the top surface of the box body. The slit communicates with the cavity of the box body. The slit faces the lower surface of the return belt of the belt conveyor. There are air inlets at the lower part of the side wall of the box body, and the air inlets are connected to the outlet of the compressed air pipeline.

[0009] For the above belt conveyor cleaning device that does not damage the belt, a plurality of through holes for installing the air knife head are evenly distributed along the length direction on the bottom beam of the base. There are a plurality of screw holes on the bottom surface of the base of the air knife head. The screw holes are opposite to the through holes of the bottom beam body of the base. Fixing bolts pass through the through holes of the bottom beam of the base and are fixedly connected to the screw holes on the bottom surface of the base of the air knife head.

[0010] For the above belt conveyor cleaning device that does not damage the belt, the box body of the air knife head is composed of two parallel rectangular side plates, two end faces and a top surface. The lower ends of the two side plates of the box body are welded and connected to the upper top surface of the base. The top surface of the box body is an inclined surface, and there is a slit along the length direction on the inclined surface.

[0011] For the above belt conveyor cleaning device that does not damage the belt, there are a plurality of partition plates in the upper part of the inner cavity of the box body of the air knife head. The partition plates are perpendicular to the length direction of the box body. The two ends of the partition plates are respectively fixedly connected to the inner walls on both sides of the box body. The upper ends of the partition plates are connected below the slit on the top surface of the box body. The intervals between the plurality of partition plates are equal. The lower ends of the partition plates are located above the air inlets of the box body.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The base of the utility model is installed below the return belt of the belt conveyor, the air knife head faces the surface of the return belt, and compressed air can clean the surface of the return belt through the air knife head; the inner cavity of the air knife head is connected to the air outlet of the compressed air pipeline, the knife head of the air knife head is a slit, and the compressed air forms a high-pressure air knife through the slit, which can effectively remove the adhesive materials on the return belt; multiple partitions separate the slit, enabling the slit air knife to have a uniform air outlet pressure in the length direction.

[0014] The utility model has a simple structure and is convenient to use. Since the air blowing method is adopted to remove impurities on the belt surface layer, it does not contact the belt and does not cause direct wear, and has good adaptability to the belt. Belt joints, belt jitter, and lateral curvature do not affect the cleaning effect. Since the knife head does not wear, the cleaning quality is high, the maintenance amount is small, the ultra-high pressure air separation effect is obvious, and there is no problem of reduced cleaning quality caused by uneven force and wear of the traditional cleaner. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the utility model;

[0016] Figure 2 is the structural schematic diagram of the base;

[0017] Figure 3 is the front view of the air knife head;

[0018] Figure 4 is Figure 3 the A-A sectional view of

[0019] Figure 5 is the installation position schematic diagram of the utility model.

[0020] The markings in the figure are as follows: belt conveyor 1, return belt 2, base 3, air knife head 4, bottom beam 5, through hole 6, mounting plate 7, mounting hole 8, base 9, screw hole 10, knife head 11, slit 12, air inlet hole 13, partition 14, return roller 15, guiding roller 16. Detailed Implementation Manner

[0021] The utility model includes a base 3 and an air knife head 4. The base 3 is composed of a bottom beam 5 and a mounting plate 7, and the air knife head 4 is composed of a base and a knife head 11.

[0022] Figure 1 、 2 shows that the bottom beam 5 is a steel long beam, the length of the bottom beam 5 matches the width of the belt conveyor 1, and the length direction of the bottom beam 5 is perpendicular to the belt running direction. Multiple through holes 6 are evenly distributed along the length direction on the bottom beam 5, and the through holes 6 are used to install the air knife head 4. The bottom beam 5 is fixedly connected to the frame below the return belt 2 of the belt conveyor 1 through the mounting plate 7.

[0023] Figure 1 and 2 It shows that the mounting plate 7 is a square steel plate. The two mounting plates 7 are fixedly welded to both ends of the bottom beam 5. There are mounting holes 8 on the mounting plate 7. The mounting holes 8 are long holes. The fixing bolts pass through the mounting holes 8 to fixedly connect the two mounting plates 7 with the frame of the belt conveyor 1.

[0024] Figure 1 and 3 It shows that the base 9 of the air knife head 4 is a cuboid steel block. The length of the base 9 matches the length of the bottom beam 5 of the base 3. The base 9 is placed on the bottom beam 5. There are multiple screw holes 10 on the bottom surface of the base 9 of the air knife head 4. The screw holes 10 are opposite to the through holes 6 of the bottom beam 5. The fixing bolts pass through the through holes 6 of the bottom beam 5 and are fixedly connected to the screw holes 10 on the bottom surface of the base 9 of the air knife head 4.

[0025] Figure 1 and 4 It shows that the knife head 11 of the air knife head 4 is a rectangular box body. The length and thickness of the box body respectively match the length and thickness of the base 9. The four sides of the box body are composed of two parallel rectangular side plates, two end faces and a top face. The lower ends of the two side plates of the box body are welded to the upper top surface of the base 9. The top face of the box body is an inclined plane. There is a slit 12 along the length direction of the box body on the inclined plane. The slit 12 is connected to the cavity of the box body. The slit 12 is opposite to the lower surface of the return belt 2 of the belt conveyor 1. The slit 12 forms the air knife of the knife head 11. Compressed air passes through the air knife of the knife head 11, and the compressed air flow ejected by the air knife clears the adhesives on the lower surface of the return belt 2. There is an air inlet hole 13 at the lower part of the side wall of the box body of the knife head 11. The air inlet hole 13 is connected to the air outlet of the compressed air pipeline. Compressed air enters the box body of the knife head 11 from the air inlet hole 13.

[0026] Figure 1 and 3 It shows that there are multiple partitions 14 in the upper part of the inner cavity of the box body of the knife head 11. The partitions 14 are perpendicular to the length direction of the box body. The two ends of the partitions 14 are respectively fixedly connected to the inner walls on both sides of the box body. The upper ends of the partitions 14 are connected below the slit 12 on the top face of the box body. The intervals between the multiple partitions 14 are equal. The lower ends of the partitions 14 are located above the air inlet hole 13 of the box body.

[0027] The function of the partition 14 is that in the middle area of the slit 12 of the knife head 11, there will be a phenomenon of insufficient air pressure and large difference in air flow velocity. Therefore, the partition 14 is used to divide the air in the slit 12 into multiple segments to solve the problem of uneven air pressure. In actual production, the slit 12 is machined on the top face of the knife head 11 by a milling machine, and multiple partitions 14 are left during the machining process.

[0028] Figure 5It is shown that the present utility model can be installed at multiple positions below the return belt 2, and the effect is best when it is located between the return roller 15 and the guiding roller 16 of the belt conveyor 1. The inclined top surface of the cutter head 11 is installed tangentially to the belt at the roller part. When installed at the position of the horizontal return belt 2, the inclined top surface of the cutter head 11 forms an angle of 45° with the horizontal belt, and the gap from the belt is 10 mm.

[0029] When the present utility model works, the air compressor provides compressed air with a pressure of 10 MPA, which is filled into the cavity of the cutter head 11 of the air cutter head 4 and ejected from the head slit 12. After being calculated by CFD software, the diffusion width of the high-pressure air formed and sprayed onto the contact surface is about 4 mm. The air pressure at the contact surface is in a peak shape. Considering the small scale, its core high-pressure area is regarded as about the same width as the slit, which is 2 mm, and rapidly decreases from the center to both sides. Since an upward thrust is generated when installed under the horizontal belt, it is recommended to install a belt pressing roller at the corresponding position.

[0030] An embodiment of the present utility model is as follows:

[0031] The bottom beam 5 of the base 3 is a channel steel with a length of 80 mm and a length of 2200 mm. The diameter of the through hole 6 in the bottom beam 5 is 16 mm;

[0032] The height of the mounting plate 7 of the base 3 is 200 mm, the width is 120 mm, the thickness is 12 mm, and the diameter of the mounting hole 8 is 14 mm;

[0033] The length of the base 9 of the air cutter head 4 is 2100 mm, the height is 270 mm, the thickness is 60 mm, and 15 groups of M14×50 bolt holes are evenly distributed at the bottom, with two in each group and an interval of 140 mm;

[0034] The length of the cutter head 11 of the air cutter head 4 is 2000 mm, the height is 70 mm, the thickness is 40 mm, the width of the top slit 12 is 2 mm, the diameter of the air inlet hole 13 is 16 mm, and there are nine partitions 14, with a height of 14 mm, a width of 2 mm, and a thickness of 2 mm.

Claims

1. A belt conveyor cleaning device that does not damage the belt, characterized in that: The air cutter head (4) comprises a base (3) and an air cutter head (4). The base (3) comprises a bottom beam (5) and a mounting plate (7). The bottom beam (5) is a long steel beam. The length of the bottom beam (5) matches the width of the belt conveyor (1). The mounting plate (7) is a square steel plate. Two mounting plates (7) are respectively fixedly welded to the two ends of the bottom beam (5). The mounting plates (7) are provided with mounting holes (8). The fixing bolts pass through the mounting holes (8) to fix the two mounting plates (7) to the frame below the return belt (2) of the belt conveyor (1). The length direction of the bottom beam (5) is perpendicular to the running direction of the belt. The air cutter head (4) comprises a base (9) and a cutter head (11). The base (9) is a rectangular parallelepiped steel block. The air cutter head (11) is The length of the base (9) of the air cutter head (4) matches the length of the bottom beam (5) of the base (3), the base (9) is placed on the bottom beam (5), the bottom surface of the base (9) is connected to the bottom beam (5), the blade head (11) of the air cutter head (4) is a rectangular box body, the length and thickness of the box body respectively match the length and thickness of the base (9), the bottom surface of the box body is fixedly connected to the upper top surface of the base (9), the top surface of the box body has a slit (12) along the length direction of the box body, the slit (12) is connected to the cavity of the box body, the slit (12) is opposite to the lower surface of the return belt (2) of the belt conveyor (1), and the lower part of the side wall of the box body has an air inlet (13), and the air inlet (13) is connected to the air outlet of the compressed air pipeline.

2. The belt conveyor cleaning device that does not damage the belt according to claim 1 is characterized in that: The bottom beam (5) of the base (3) is evenly distributed along the length direction with a plurality of through holes (6) for mounting the air knife head (4); the bottom surface of the base (9) of the air knife head (4) is provided with a plurality of screw holes (10); the screw holes (10) are opposite to the through holes (6) of the bottom beam (5) body; fixing bolts pass through the through holes (6) of the bottom beam (5) of the base (3) and are fixedly connected with the screw holes (10) on the bottom surface of the base (9) of the air knife head (4).

3. The belt conveyor cleaning device without damaging the belt according to claim 1, characterized in that: The box body of the air blade head (4) is composed of two parallel rectangular side panels, two end panels and a top surface. The lower ends of the two side panels of the box body are welded to the upper top surface of the base (9). The top surface of the box body is an inclined surface, and a slit (12) is provided on the inclined surface along the length direction of the box body.

4. The belt conveyor cleaning device without damaging the belt according to claim 1, characterized in that: A plurality of partitions (14) are provided at the upper part of the inner cavity of the box body of the air knife head (4), the partitions (14) being perpendicular to the length direction of the box body, the two ends of the partitions (14) being fixedly connected to the inner walls on both sides of the box body respectively, the upper end of the partitions (14) being connected below the slit (12) on the top surface of the box body, the intervals between the plurality of partitions (14) being equal, and the lower ends of the partitions (14) being located above the air inlet (13) of the box body.

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