Coal pulverizing device

Abstract

This invention relates to the field of coal crushing technology and proposes a coal crushing device, including a frame and a flushing device, a conveying device, a hopper, and a crushing device sequentially arranged on the frame. The inner wall of the hopper outlet is semi-circular, and an anti-clogging mechanism is added inside the hopper. The anti-clogging mechanism includes a rotating shaft and baffles. The rotating shaft is rotatable inside the hopper around its axis. Multiple baffles are evenly arranged on the outer circumference of the rotating shaft, with the outer ends of the baffles fitting against the semi-circular inner wall of the hopper. The distance between the ends of two adjacent baffles is greater than the outlet width of the hopper. This technical solution solves the problem of easy clogging at the feed inlet of existing coal crushing devices.

Description

Technical Field

[0001] This invention relates to the field of coal crushing technology, specifically to a coal crushing device. Background Technology

[0002] Coal is a solid combustible mineral formed gradually from ancient plants buried underground through complex biochemical and physicochemical changes. The supply of coal is crucial to the stability of industry and all aspects of society. To facilitate loading and transportation, and to increase the surface area for contact with oxygen, coal needs to be crushed after mining. Current technology uses coal crushers to crush coal. However, insufficient crushing efficiency or excessive conveying speed often leads to blockages at the crusher's inlet, affecting normal operation. Because coal blocks the feed inlet, and the coal is continuously conveyed online, maintenance after blockages is time-consuming and labor-intensive. Furthermore, coal is extracted from underground strata using mechanical means. These coal products are not simply composed of coal; the mined coal also contains impurities such as mud and ash. These impurities not only generate dust during crushing but also affect the quality of the coal products. To remove mud and ash, the coal needs to be washed before crushing. The drying process after washing is time-consuming, indirectly reducing production efficiency. The existing technology has not adequately addressed the above problems, causing difficulties for the normal operation of the field. Therefore, there is an urgent need for a coal crushing device that can effectively prevent clogging. Summary of the Invention

[0003] This invention proposes a coal crushing device that solves the problem of easy clogging at the feed inlet of coal crushing devices in related technologies.

[0004] The technical solution of the present invention is as follows: A coal crushing device includes a frame and a flushing device, a conveying device, a hopper and a crushing device arranged sequentially on the frame. The inner wall of the outlet end of the hopper is semi-circular. An anti-blocking mechanism is added inside the hopper. The anti-blocking mechanism includes a rotating shaft and a partition. The rotating shaft is rotatably disposed inside the hopper around the axis of the hopper. There are multiple partitions, which are evenly disposed on the outer circle of the rotating shaft. The outer end of the partition is attached to the inner wall of the semi-circular hopper. The distance between the ends of two adjacent partitions is greater than the outlet width of the hopper.

[0005] As a further technical solution

[0006] The hopper is located above the inlet of the crushing device. There is a feeding channel between the outlet of the hopper and the inlet of the crushing device. The feeding channel includes multiple swing plates. One end of the swing plate is hinged to the inlet of the crushing device, and the other end abuts against the outer wall of the hopper.

[0007] As a further technical solution

[0008] A centrifugal mechanism is provided below the outlet of the pulverizing device. The centrifugal mechanism includes a centrifugal cylinder and a turntable. The centrifugal cylinder is mounted on the frame. The turntable is coaxially mounted with the centrifugal cylinder and rotatably mounted inside the centrifugal cylinder. An annular material discharge port is formed between the outer edge of the turntable and the inner wall of the centrifugal cylinder. Several retaining rings are radially distributed on the turntable. The retaining rings are intermittently arranged, and the inner side of the retaining rings is an inclined surface.

[0009] As a further technical solution

[0010] The inner wall of the centrifuge tube has a magnetic layer, which is located at the same height as the turntable and is used to adsorb ferrous and magnetic materials.

[0011] As a further technical solution

[0012] The centrifuge cylinder has a polygonal cross-section. A cleaning component is slidably disposed on the inner wall of the centrifuge cylinder along the direction parallel to the axis. A spiral slide is disposed on the outer wall of the centrifuge cylinder for collecting the material scraped out by the cleaning component.

[0013] As a further technical solution

[0014] The cleaning assembly includes a sliding plate and a scraper. The sliding plate is slidably disposed on the inner wall of the centrifuge cylinder in a direction parallel to the axis. The inner wall of the centrifuge cylinder has a stop for limiting the lowest position of the sliding plate. The scraper is oscillating on the sliding plate. The sliding plate has a first limiting part and a second limiting part for positioning the upper and lower limit positions of the scraper oscillation, respectively.

[0015] As a further technical solution

[0016] A lifting rod is slidably arranged on the frame along a direction parallel to the axis of the centrifuge cylinder. A limiting roller is rotatably arranged at the bottom end of the lifting rod. The limiting roller is horizontally arranged. The scraper has a groove, and the limiting roller is located in the groove.

[0017] As a further technical solution

[0018] The rinsing device includes a vibrating plate, a vibrating motor, and high-pressure nozzles. The vibrating plate is inclinedly arranged on the frame, the vibrating motor is mounted on the vibrating plate, and multiple high-pressure nozzles are arranged on the frame. The multiple high-pressure nozzles are distributed along a direction parallel to the vibrating plate and are located above the vibrating plate. The vibrating plate has multiple water flow holes.

[0019] As a further technical solution

[0020] It also includes a water circulation system, which comprises a water tank, a filter unit and a water storage tank connected in sequence. The top of the water tank is open and located below the vibrating plate. The water storage tank is connected to the high-pressure nozzle.

[0021] As a further technical solution

[0022] The vibrating plate has a pre-fabricated water channel located at the front end of the vibrating plate. One end of the pre-fabricated water channel is connected to the water storage tank, and the other end is open and close to the surface of the vibrating plate.

[0023] The working principle and beneficial effects of this invention are as follows: the possibility of clogging is reduced by changing the structure of the hopper that supplies material to the crushing device. Specifically, the inner wall of the hopper opening is designed to be semi-circular, and a rotating shaft is added inside it. Multiple baffles are installed on the circumference of the rotating shaft. The rotating shaft is coaxial with the hopper, so that when the rotating shaft rotates, the baffles can scrape against the inner wall of the hopper, and the multiple baffles divide the inside of the hopper into several cavities. During normal operation, the conveying device feeds material into the hopper. As the shaft rotates, multiple cavities sequentially connect to the hopper's outlet, achieving batch-wise, throttling, and stable material flow. This prevents large volumes of coal from accumulating at the inlet of the crushing device, significantly reducing the likelihood of blockage and solving the problem of easy blockage at the inlet of existing coal crushing devices. Furthermore, the distance between the ends of the two baffles is greater than the hopper's outlet width. This allows the baffle position to be controlled by stopping the shaft's rotation. When the two baffles are positioned on either side of the hopper outlet, the outlet is closed. In case of blockage, the hopper outlet is closed, preventing further material supply to the crushing device and avoiding more severe blockage. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram showing the overall external connection of the coal crushing device of the present invention;

[0026] Figure 2 Appendix to this invention Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the centrifuge mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the turntable of the present invention;

[0029] Figure 5 This is a schematic diagram of the cross-section of the centrifuge tube of the present invention;

[0030] Figure 6 Appendix to this invention Figure 5 Enlarged view at point B in the middle;

[0031] Figure 7 This is a schematic diagram of the vertical cross-section of the centrifuge cylinder of the present invention;

[0032] Figure 8 Appendix to this invention Figure 7 Enlarged view at point C;

[0033] Figure 9 This is a schematic diagram of the scraper abutting the second limiting part of the present invention;

[0034] Figure 10 This is a schematic diagram of the scraper abutting the first limiting part of the present invention.

[0035] In the diagram: 1. Frame, 2. Washing device, 3. Conveying device, 4. Hopper, 5. Crushing device, 6. Rotating shaft, 7. Partition plate, 8. Feeding channel, 9. Swinging plate, 10. Centrifugal mechanism, 11. Centrifugal cylinder, 12. Turntable, 13. Discharge port, 14. Baffle ring, 15. Magnetic layer, 16. Sliding plate, 17. Scraper, 18. Baffle, 19. First limiting part, 20. Second limiting part, 21. Lifting rod, 22. Limiting roller, 23. Slide groove, 24. Vibrating plate, 25. Vibrating motor, 26. High-pressure nozzle, 27. Water outlet, 28. Water tank, 29. Filter unit, 30. Water storage tank, 31. Prefabricated water channel, 32. Spiral slide. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figures 1-10 As shown, this embodiment proposes a coal crushing device 5, including a frame 1 and a flushing device 2, a conveying device 3, a hopper 4 and a crushing device 5 arranged sequentially on the frame 1. The inner wall of the outlet end of the hopper 4 is semi-circular. An anti-blocking mechanism is added inside the hopper 4. The anti-blocking mechanism includes a rotating shaft 6 and a partition 7. The rotating shaft 6 is rotatably disposed inside the hopper 4 around the axis of the hopper 4. There are multiple partitions 7, which are evenly arranged on the outer circle of the rotating shaft 6. The outer end of the partition 7 is attached to the inner wall of the semi-circular shape of the hopper 4. The distance between the ends of two adjacent partitions 7 is greater than the outlet width of the hopper 4.

[0038] In this embodiment, the possibility of clogging is reduced by changing the structure of the hopper 4 that supplies material to the crushing device 5. Specifically, the inner wall of the opening end of the hopper 4 is designed to be semi-circular, and a rotating shaft 6 is added inside it. Multiple baffles 7 are installed on the circumference of the rotating shaft 6. The rotating shaft 6 is coaxial with the hopper 4, so that when the rotating shaft 6 rotates, the baffles 7 can scrape against the inner wall of the hopper 4, and the multiple baffles 7 divide the interior of the hopper 4 into several cavities. During normal operation, the conveying device 3 feeds material into the hopper 4. As the rotating shaft 6 rotates, multiple cavities sequentially connect to the outlet of the hopper 4, achieving batch-wise throttling and stable material feeding. This prevents large volumes of coal from accumulating at the inlet of the crushing device 5, thus greatly reducing the possibility of blockage and solving the problem of easy blockage at the inlet of the coal crushing device 5 in the prior art. In addition, the distance between the ends of the two baffles 7 is greater than the outlet width of the hopper 4. Thus, the position of the baffles 7 can be controlled by stopping the rotating shaft 6. When the two baffles 7 are located on both sides of the outlet of the hopper 4, the outlet of the hopper 4 is closed. When a blockage occurs, the outlet of the hopper 4 is closed, and no more material is supplied to the crushing device 5, preventing the blockage from becoming more serious.

[0039] Furthermore, it also includes,

[0040] The hopper 4 is located above the inlet of the crushing device 5. There is a feeding channel 8 between the outlet of the hopper 4 and the inlet of the crushing device 5. The feeding channel 8 includes a plurality of swing plates 9. One end of the swing plate 9 is hinged to the inlet of the crushing device 5, and the other end abuts against the outer wall of the hopper 4.

[0041] In this embodiment, the feeding channel 8 between the hopper 4 and the crushing device 5 is composed of multiple swing plates 9. After the multiple swing plates 9 swing inward, their sides abut against each other, and their ends abut against the hopper 4 to form a sealed channel. In order to facilitate inspection and maintenance after blockage, the installation method of the swing plates 9 is designed to swing. When blockage occurs, the feeding channel 8 can be opened by swinging the swing plates 9 outward, so that the feeding channel 8 is open, making it convenient to observe the blockage and also convenient to operate at the blockage.

[0042] Furthermore, it also includes,

[0043] A centrifugal mechanism 10 is provided below the outlet of the crushing device 5. The centrifugal mechanism 10 includes a centrifugal cylinder 11 and a turntable 12. The centrifugal cylinder 11 is mounted on the frame 1. The turntable 12 is coaxially mounted with the centrifugal cylinder 11 and rotatably mounted inside the centrifugal cylinder 11. An annular discharge port 13 is formed between the outer edge of the turntable 12 and the inner wall of the centrifugal cylinder 11. Several retaining rings 14 are radially distributed on the turntable 12. The retaining rings 14 are intermittently arranged, and the inner side of the retaining rings 14 is an inclined surface.

[0044] In this embodiment, a centrifugal mechanism 10 is provided for rapid drying of the washed and pulverized coal. The pulverized coal falls onto a turntable 12, which generates centrifugal force through high-speed rotation, scattering the coal, which has been pulverized to a particle size of a few millimeters, towards the surrounding discharge ports 13. The centrifugal force separates the water adhering to the coal, thereby improving the dryness of the coal. In addition, the centrifugal mechanism 10 allows the coal to be dried simultaneously with its transport, thus ensuring production efficiency while drying. When the turntable 12 rotates, the coal is dispersed outward by centrifugal force, and the baffle ring 14 acts as a barrier, prolonging the time the coal spends on the turntable 12, allowing it to be subjected to centrifugal force for a longer period, thereby improving the drying effect. Furthermore, the inner side of the baffle ring 14 is designed as a slope, so that the coal can only pass over the baffle ring 14 when subjected to a large centrifugal force, thus ensuring that the centrifugal force on the coal is sufficiently large.

[0045] Furthermore, it also includes,

[0046] The inner wall of the centrifuge cylinder 11 has a magnetic layer 15, which is located at the same height as the turntable 12 and is used to adsorb ferrous and magnetic materials.

[0047] In this embodiment, the inner wall of the centrifuge cylinder 11 has a magnetic layer 15, which is installed at the same height as the turntable 12. When the turntable 12 rotates and generates centrifugal force, it can not only separate the coal from the water stains, but also disperse the coal in all directions through the centrifugal force, thereby contacting the surrounding magnetic layer 15. After the coal contacts the magnetic layer 15, the iron and magnetic materials in it will be adsorbed on the magnetic layer 15, while the coal continues to fall through the annular discharge port 13, thus realizing magnetic separation. It should be emphasized that in this embodiment, by rotating the turntable 12 and cooperating with the magnetic layer 15, centrifugal drying, magnetic separation and normal conveying are realized at the same time, realizing multiple functions in one process, thereby improving production efficiency.

[0048] Furthermore, it also includes,

[0049] The centrifuge cylinder 11 has a polygonal cross-section. A cleaning component is slidably disposed on the inner wall of the centrifuge cylinder 11 along the direction parallel to the axis. A spiral slide 32 is disposed on the outer wall of the centrifuge cylinder 11 for collecting the material scraped out by the cleaning component.

[0050] Furthermore, it also includes,

[0051] The cleaning assembly includes a sliding plate 16 and a scraper 17. The sliding plate 16 is slidably disposed on the inner wall of the centrifuge cylinder 11 in a direction parallel to the axis. The inner wall of the centrifuge cylinder 11 has a stop 18 for limiting the lowest position of the sliding plate 16. The scraper 17 is oscillatingly disposed on the sliding plate 16. The sliding plate 16 has a first limiting part 19 and a second limiting part 20 for positioning the upper and lower limit positions of the oscillation of the scraper 17, respectively.

[0052] In this embodiment, a cleaning assembly is slidably disposed on the inner wall of the centrifuge cylinder 11 to clean the material adsorbed by the magnetic layer 15, ensuring the utilization rate of the magnetic layer 15. Specifically, the cleaning assembly includes a sliding plate 16 and a scraper 17. The sliding plate 16 is slidably connected to the inner wall of the centrifuge cylinder 11. A stop 18 is provided at the lower part of the inner wall of the centrifuge cylinder 11 to block the sliding plate 16 when it descends, thereby limiting its lowest limit position. The scraper 17 is oscillatingly connected to the sliding plate 16, and the uppermost and lowermost positions of the scraper 17 are respectively limited by the first limiting part 19 and the second limiting part 20. When scraper 17 swings to its highest point, it forms an acute angle with the inner wall of the upper centrifuge cylinder 11, facilitating scraping against the inner wall and acting as a collector to prevent excessive material accumulation on scraper 17 from overflowing and falling. When scraper 17 swings to its lowest point, it forms an obtuse angle with the inner wall of the upper centrifuge cylinder 11, ensuring that it does not obstruct the normal falling of material when the turntable 12 rotates normally. After contacting scraper 17, the material will also gather towards the center, while also acting as a guide. After scraper 17 rises to its highest point, it extends out of the centrifuge cylinder 11, scraping out the material. At this point, the material is no longer attracted by the magnetic layer 15 and falls along the outer wall of the centrifuge cylinder 11 by its own weight, falling into the spiral chute 32, achieving rapid collection of the material.

[0053] Furthermore, it also includes,

[0054] A lifting rod 21 is slidably arranged on the frame 1 along the direction parallel to the axis of the centrifuge cylinder 11. A limiting roller 22 is rotatably arranged at the bottom end of the lifting rod 21. The limiting roller 22 is arranged horizontally. The scraper 17 has a sliding groove 23, and the limiting roller 22 is located in the sliding groove 23.

[0055] In this embodiment, a cylinder is installed on the frame 1, and the telescopic end of the cylinder is connected to the lifting rod 21. The lifting rod 21 is used to control the sliding of the sliding plate 16. Specifically, a limiting roller 22 is rotatably provided at the bottom of the lifting rod 21. The limiting roller 22 is horizontally arranged, and the scraper 17 has a groove 23. The limiting roller 22 is located in the groove 23. When the lifting rod 21 rises or falls, the limiting roller 22 will slide in the groove 23. When the lifting rod 21 descends, it first controls the scraper 17 to swing downwards, and after it abuts against the second limiting part 20, it controls the sliding plate 16 to descend until it abuts against the stop part 18. When the lifting rod 21 rises, it first controls the scraper 17 to swing upwards, and after it abuts against the first limiting part 19, it controls the sliding plate 16 to rise until it protrudes from the centrifuge cylinder 11, thus achieving cleaning.

[0056] Furthermore, it also includes,

[0057] The rinsing device 2 includes a vibrating plate 24, a vibrating motor 25, and a high-pressure nozzle 26. The vibrating plate 24 is inclinedly arranged on the frame 1. The vibrating motor 25 is mounted on the vibrating plate 24. There are multiple high-pressure nozzles 26 arranged on the frame 1. The multiple high-pressure nozzles 26 are distributed along a direction parallel to the vibrating plate 24 and are located above the vibrating plate 24. The vibrating plate 24 has multiple water flow holes 27.

[0058] In this embodiment, a washing device 2 is provided to remove mud and dust from the coal. The vibrating motor 25 drives the vibrating plate 24 to vibrate, and the vibrating plate 24 is tilted to realize the conveying of coal. During the conveying process, multiple high-pressure nozzles 26 above wash the coal, so that mud and dust are removed from the coal. The wastewater after washing flows down through the water holes 27 on the vibrating plate 24, thereby improving the quality of coal products and reducing dust during subsequent crushing.

[0059] Furthermore, it also includes,

[0060] It also includes a water circulation system, which includes a water tank 28, a filter unit 29 and a water storage tank 30 connected in sequence. The top of the water tank 28 is open and located below the vibrating plate 24. The water storage tank 30 is connected to the high-pressure nozzle 26.

[0061] In this embodiment, a water tank 28 is provided below the vibrating plate 24 to collect the wastewater after rinsing. The wastewater is then filtered by the filtration unit 29 and discharged back into the water storage tank 30 to achieve water circulation and ensure the stability of the water supply.

[0062] Furthermore, it also includes,

[0063] The vibrating plate 24 has a prefabricated water channel 31 located at the front end of the vibrating plate 24. One end of the prefabricated water channel 31 is connected to the water storage tank 30, and the other end is open and close to the surface of the vibrating plate 24.

[0064] In this embodiment, a pre-fabricated water channel 31 is also provided inside the vibrating plate 24. The pre-fabricated water channel 31 is located at the front end of the vibrating plate 24, and the outlet of the pre-fabricated water channel 31 is close to the surface of the vibrating plate 24 and parallel to the surface of the vibrating plate 24, so that the water flows to the bottom of the coal for bottom rinsing, and the high-pressure nozzle 26 above rinsing the top. Combined with the vibration of the vibrating plate 24, the coal is continuously tumbled, thereby achieving thorough rinsing from multiple directions and improving the rinsing effect.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal crushing device, comprising a frame (1) and a flushing device (2), a conveying device (3), a hopper (4), and a crushing device (5) sequentially arranged on the frame (1), characterized in that, The inner wall of the outlet end of the hopper (4) is semi-circular. An anti-blocking mechanism is added inside the hopper (4). The anti-blocking mechanism includes a rotating shaft (6) and a partition (7). The rotating shaft (6) is rotatably disposed inside the hopper (4) around the axis of the hopper (4). There are multiple partitions (7) evenly disposed on the outer circle of the rotating shaft (6). The outer end of the partition (7) is attached to the inner wall of the semi-circular hopper (4). The distance between the ends of two adjacent partitions (7) is greater than the outlet width of the hopper (4). A centrifugal mechanism (10) is provided below the outlet of the crushing device (5). The centrifugal mechanism (10) includes a centrifugal cylinder (11) and a turntable (12). The centrifugal cylinder (11) is provided on the frame (1). The turntable (12) is coaxially arranged with the centrifugal cylinder (11) and rotatably arranged inside the centrifugal cylinder (11). An annular discharge port (13) is formed between the outer edge of the turntable (12) and the inner wall of the centrifugal cylinder (11). Several retaining rings (14) are radially distributed on the turntable (12). The retaining rings (14) are intermittently arranged, and the inner side of the retaining rings (14) is an inclined surface. The centrifuge tube (11) has a polygonal cross-section. A cleaning component is slidably provided on the inner wall of the centrifuge tube (11) along the direction parallel to the axis. A spiral slide (32) is provided on the outer wall of the centrifuge tube (11) for collecting the material scraped out by the cleaning component. The cleaning assembly includes a sliding plate (16) and a scraper (17). The sliding plate (16) is slidably disposed on the inner wall of the centrifuge cylinder (11) in a direction parallel to the axis. The inner wall of the centrifuge cylinder (11) has a stop (18) for limiting the lowest position of the sliding plate (16). The scraper (17) is oscillating on the sliding plate (16). The sliding plate (16) has a first limiting part (19) and a second limiting part (20) for positioning the upper and lower limit positions of the oscillation of the scraper (17) respectively.

2. The coal crushing device according to claim 1, characterized in that, The hopper (4) is located above the inlet of the crushing device (5). There is a feeding channel (8) between the outlet of the hopper (4) and the inlet of the crushing device (5). The feeding channel (8) includes multiple swing plates (9). One end of the swing plate (9) is hinged to the inlet of the crushing device (5), and the other end abuts against the outer wall of the hopper (4).

3. The coal crushing device according to claim 1, characterized in that, The centrifuge tube (11) has a magnetic layer (15) on its inner wall. The magnetic layer (15) is at the same height as the turntable (12) and is used to adsorb ferrous and magnetic materials.

4. A coal crushing device according to claim 1, characterized in that, A lifting rod (21) is slidably arranged on the frame (1) along the direction parallel to the axis of the centrifuge cylinder (11). A limiting roller (22) is rotatably arranged at the bottom end of the lifting rod (21). The limiting roller (22) is horizontally arranged. The scraper (17) has a groove (23). The limiting roller (22) is located in the groove (23).

5. A coal crushing device according to claim 1, characterized in that, The rinsing device (2) includes a vibrating plate (24), a vibrating motor (25), and a high-pressure nozzle (26). The vibrating plate (24) is inclinedly arranged on the frame (1). The vibrating motor (25) is mounted on the vibrating plate (24). There are multiple high-pressure nozzles (26) arranged on the frame (1). The multiple high-pressure nozzles (26) are distributed along a direction parallel to the vibrating plate (24) and located above the vibrating plate (24). The vibrating plate (24) has multiple water flow holes (27).

6. A coal crushing device according to claim 5, characterized in that, It also includes a water circulation system, which includes a water tank (28), a filter unit (29) and a water storage tank (30) connected in sequence. The top of the water tank (28) is open and located below the vibrating plate (24). The water storage tank (30) is connected to the high-pressure nozzle (26).

7. A coal crushing device according to claim 6, characterized in that, The vibrating plate (24) has a prefabricated water channel (31) located at the front end of the vibrating plate (24). One end of the prefabricated water channel (31) is connected to the water storage tank (30), and the other end is open and close to the surface of the vibrating plate (24).

Images