A scraping sludge dewatering device

Abstract

The utility model relates to sludge treatment technical field discloses a kind of scraping material sludge dewatering devices, including box, the front side wall of the box is fixedly connected with protection box, the inside of the protection box is provided with driving motor, the output of the driving motor is fixedly connected with first rotating rod, the inside left side front and back two side walls of the box are rotatably connected with first connecting rod, the rear end of the first rotating rod is fixedly connected in the inside front end of first connecting rod.The utility model is provided with driving motor, first sprocket, second sprocket, can solve the problem that the processing capacity of device is reduced, sludge dewatering operation cannot be continuously and stably carried out, wear and tear of acceleration component is accelerated, service life of equipment is reduced, effectively improve the overall dehydration efficiency when scraping plate slides from left side to right side, prolong the service life of equipment, reduce the maintenance frequency and cost of equipment, ensure the normal operation of equipment.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, and in particular to a scraper-type sludge dewatering device. Background Technology

[0002] Because sludge has a high water content, a large quantity, and is enriched with high concentrations of pollutants, if it is not properly treated or disposed of, it will not only directly affect the normal operation of urban sewage treatment plants, but more importantly, it will cause serious secondary pollution to the environment.

[0003] During wastewater and sludge treatment, dewatered sludge gradually accumulates within the equipment, occupying a significant amount of space and reducing the effective dewatering area. Accumulated sludge hinders filtrate discharge, preventing timely separation of water from the sludge, reducing dewatering efficiency, decreasing the equipment's processing capacity, and hindering continuous and stable sludge dewatering operations. This also accelerates component wear and reduces equipment lifespan. During sludge filtration, fine particles and impurities in the sludge easily clog the filter cloth pores, rapidly increasing filtration resistance, slowing filtrate flow, and significantly reducing filtration efficiency. Frequent clogging and uneven filtration pressure accelerate filter cloth wear and damage, leading to more frequent filter cloth replacements, increased maintenance costs, increased filtration resistance, reduced filtration speed, and a substantial decrease in filtration efficiency. Utility Model Content

[0004] The main purpose of this utility model is to provide a scraper-type sludge dewatering device, which can effectively solve the problems that lead to a decrease in the device's processing capacity, inability to continuously and stably carry out sludge dewatering operations, accelerated wear of components, reduced service life of the equipment, and the need for more frequent replacement of filter cloth, increased maintenance costs, increased filtration resistance, reduced filtration speed, and a significant decrease in filtration efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a scraping sludge dewatering device, comprising a housing, a protective box fixedly connected to the front side wall of the housing, a drive motor disposed inside the protective box, a first rotating rod fixedly connected to the output end of the drive motor, first connecting rods rotatably connected to the front and rear side walls of the left side of the housing, the rear end of the first rotating rod fixedly connected to the front end of the first connecting rod, first sprockets fixedly connected to the outer sides of both the front and rear ends of the first connecting rod, chains disposed on both the front and rear side walls of the housing, the outer sides of the two first sprockets meshing with the inner left sides of the two chains, second connecting rods penetratingly connected to the front and rear side walls of the housing, second sprockets fixedly connected to the outer sides of both the front and rear ends of the two second connecting rods, the outer sides of the two second sprockets meshing with the inner right sides of the two chains.

[0006] Furthermore, a first connecting ring is fixedly connected to the outer side of the two second sprockets, and a connecting block is provided in the groove of the inner side wall of each of the two first connecting rings. A fixing plate is fixedly connected to the inner side wall of each pair of connecting blocks, and a scraper is fixedly connected to the bottom of each fixing plate. A guide plate is fixedly connected to the inner bottom wall of the box, and the upper side wall of the guide plate is correspondingly arranged with multiple scrapers.

[0007] Furthermore, a partition plate is fixedly connected inside the box, and a first guide plate is fixedly connected to the top of the partition plate. The left side wall of the first guide plate is correspondingly arranged with multiple scrapers, and a feed pipe is connected through the left side of the box.

[0008] Furthermore, a control panel is fixedly connected to the left side of the front wall of the box, a dosing pipe is connected through the top left side of the box, and drain pipes are connected through the front and rear sides of the right side of the box.

[0009] Furthermore, a first support plate is fixedly connected to the inner right side wall of the box and the right side wall of the partition plate. A second connecting ring is provided at the top of the first support plate. A sieve plate is fixedly connected to the inner bottom wall of the second connecting ring. A fixing ring is fixedly connected to the bottom outer side of the second connecting ring. A sewage pipe is connected through the right side wall of the second connecting ring. A second guide plate is connected through the inside of the right side wall of the box. The bottom wall of the sewage pipe is located at the top of the second guide plate.

[0010] Furthermore, a second support plate is fixedly connected to the middle of the inner right side wall of the box and the right side wall of the partition plate. A device box is fixedly connected to the upper side wall of the second support plate. Springs are fixedly connected inside the four device boxes. Mounting blocks are fixedly connected to the top of the four springs. The top of the four mounting blocks is fixedly connected to the bottom wall of the fixing ring. Connecting columns are fixedly connected to the front and rear side walls of the second connecting ring.

[0011] Furthermore, a base plate is fixedly connected to the right side wall of the housing, and an outer box is threadedly connected to the top of the base plate. A bidirectional motor is installed inside the outer box, and a second rotating rod is fixedly connected to both the front and rear output ends of the bidirectional motor.

[0012] Furthermore, each of the two second rotating rods has an eccentric wheel fixedly connected to its other end, and a support rod is rotatably connected to the outer side wall of each of the two eccentric wheels. The left inner side of each of the two support rods is rotatably connected to the outer side of the two connecting columns.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through its drive motor, first sprocket, second sprocket, scraper, partition plate, and first guide plate, solves the problems of reduced processing capacity, inability to continuously and stably perform sludge dewatering, accelerated component wear, and shortened equipment lifespan. When the scraper slides from left to right, its right side contacts the first guide plate at the top of the partition plate, conveying the sludge onto the first guide plate. The first guide plate then guides the sludge to the right side of the housing for further processing. After contact with the first guide plate, the right side of the scraper slides downwards on the left side of the first guide plate, scraping off any adhering sludge and guiding it into the first guide plate. This effectively improves overall dewatering efficiency, extends equipment lifespan, reduces maintenance frequency and costs, and ensures normal equipment operation.

[0014] 2. By incorporating a sieve plate, springs, a base plate, a bidirectional motor, an eccentric wheel, and a second guide plate, the system effectively addresses the issues of more frequent filter cloth replacements, increased maintenance costs, increased filtration resistance, reduced filtration speed, and significantly decreased filtration efficiency. A drain pipe penetrates the right side wall of the second connecting ring, with its bottom wall positioned above the second guide plate, which extends through the interior of the right side wall of the housing. Ultimately, the dewatered sludge is discharged through the drain pipe. During this discharge process, the second guide plate guides the sludge smoothly out of the housing, completing the subsequent dewatering and discharge stages of the sludge dewatering process. This effectively reduces filtration resistance, improves filtration efficiency, enhances sludge dewatering, and lowers the moisture content of the dewatered sludge.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a scraper-type sludge dewatering device proposed in this utility model; Figure 2 This is an internal cross-sectional view of a scraper-type sludge dewatering device proposed in this utility model; Figure 3 This is a structural diagram of the first connecting rod of a scraper-type sludge dewatering device proposed in this utility model; Figure 4 This is a structural diagram of the fixing plate of a scraper-type sludge dewatering device proposed in this utility model; Figure 5 This is a structural diagram of the first guide plate of a scraper-type sludge dewatering device proposed in this utility model; Figure 6 This is a structural diagram of the second connecting ring of a scraper-type sludge dewatering device proposed in this utility model; Figure 7 This is a schematic diagram of the sieve plate of a scraper-type sludge dewatering device proposed in this utility model; Figure 8 This is a structural diagram of the device box of a scraper-type sludge dewatering device proposed in this utility model; Figure 9 This is a structural diagram of the second support plate of a scraper-type sludge dewatering device proposed in this utility model.

[0017] Legend: 1. Housing; 2. Protective box; 3. Drive motor; 4. First rotating rod; 5. First connecting rod; 6. First sprocket; 7. Chain; 8. Second connecting rod; 9. Second sprocket; 10. First connecting ring; 11. Connecting block; 12. Fixing plate; 13. Scraper; 14. Guide plate; 15. Divider plate; 16. First guide plate; 17. Feed pipe; 18. Control panel; 19. Dosing pipe; 20. Drain pipe; 21. First support plate; 22. Second connecting ring; 23. Screening plate; 24. Fixing ring; 25. Second support plate; 26. Device box; 27. Spring; 28. Mounting block; 29. ​​Connecting column; 30. Base plate; 31. Outer box; 32. Bidirectional motor; 33. Second rotating rod; 34. Eccentric wheel; 35. Support rod; 36. Sewage pipe; 37. Second guide plate. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figure 1 - Figure 4 As shown: A scraping-type sludge dewatering device includes a housing 1. A protective box 2 is fixedly connected to the front side wall of the housing 1. A drive motor 3 is installed inside the protective box 2. The protective box 2 protects the drive motor 3 from the outside and also supports the drive motor 3 by fixing it to the front side wall of the housing 1. A first rotating rod 4 is fixedly connected to the output end of the drive motor 3. A first connecting rod 5 is rotatably connected to the front and rear side walls on the left side inside the housing 1. The rear end of the first rotating rod 4 is fixedly connected to the front end of the first connecting rod 5. When the drive motor 3 is started, the first rotating rod 4 on the output end of the drive motor 3, fixed inside the front end of the first connecting rod 5, drives the first connecting rod 5 to rotate on the front and rear side walls inside the housing 1.

[0020] First sprockets 6 are fixedly connected to the outer sides of both the front and rear ends of the first connecting rod 5. Chains 7 are provided on both the front and rear side walls inside the housing 1. The outer sides of the two first sprockets 6 mesh with the inner left side of the two chains 7. Second connecting rods 8 are connected through the front and rear side walls inside the housing 1. Second sprockets 9 are fixedly connected to the outer sides of both the front and rear ends of the two second connecting rods 8. The outer sides of the two second sprockets 9 mesh with the inner right side of the two chains 7. The first sprockets 6 on the outer sides of the front and rear ends of the first connecting rod 5 mesh with the chains 7, and the chain 7 is driven to operate inside the housing 1 by the drive motor 3. In addition, the second connecting rods 8 connected through the front and rear side walls inside the housing 1 connect and support the second sprockets 9 on their front and rear ends. The outer sides of the second sprockets 9 mesh with the inner right side of the chain 7, driving the second sprockets 9 and the second connecting rods 8 to rotate inside the housing 1, and supporting the right side of the chain 7, so that the chain 7 can maintain a balanced and stable effect when rotating.

[0021] like Figure 1 - Figure 5 As shown, two second sprockets 9 are fixedly connected to the outer sides of a first connecting ring 10. Each of the two first connecting rings 10 has a connecting block 11 in the groove of its inner sidewall. Each pair of connecting blocks 11 has a fixed plate 12 fixedly connected to its inner sidewall. Each fixed plate 12 has a scraper 13 fixedly connected to its bottom. The connecting blocks 11 in the groove of the inner sidewall of the first connecting ring 10 can fit tightly into the groove. The connecting blocks 11 and the fixed plates 12 are firmly fixedly connected. When the first connecting ring 10 rotates, the fixed plates 12 are driven to make circular motion through the transmission of the connecting blocks 11. This causes the scraper 13 fixedly connected to the bottom of the fixed plate 12 to scrape back and forth along a specific circular trajectory at the bottom of the housing 1.

[0022] A guide plate 14 is fixedly connected to the bottom wall of the inner chamber 1. The upper side wall of the guide plate 14 is correspondingly arranged with multiple scrapers 13. A partition plate 15 is fixedly connected to the inner chamber 1. A first guide plate 16 is fixedly connected to the top of the partition plate 15. The left side wall of the first guide plate 16 is correspondingly arranged with multiple scrapers 13. When the scraper 13 moves, it pushes the sludge deposited on the guide plate 14, causing the sludge to slide to the left. When the scraper 13 slides from the left to the right, the right side of the scraper 13 contacts the first guide plate 16 at the top of the partition plate 15, and transports the sludge carried by the scraper 13 to the first guide plate 16. The first guide plate 16 guides the sludge to the right side of the chamber 1 for further processing. The left side of the guide plate 14 also guides the sludge, guiding the sludge falling from the scraper 13 so that the next scraper 13 can carry the sludge upward.

[0023] A feed pipe 17 is connected through the left side of the tank body 1, which connects to external pipes to transport external sewage and sludge into the tank body 1 for treatment. A control panel 18 is fixedly connected to the left side of the front wall of the tank body 1, which controls the entire equipment. A dosing pipe 19 is connected through the top left side of the tank body 1, through which chemicals are added to the tank body 1 to mix with the sewage and sludge. Drain pipes 20 are connected through the front and rear sides of the right side of the tank body 1, through which the filtered sewage is discharged.

[0024] like Figure 1 - Figure 9 As shown, a first support plate 21 is fixedly connected to the right side wall of the inner side of the box 1 and the right side wall of the partition plate 15. A second connecting ring 22 is provided on the top of the first support plate 21. A screen plate 23 is fixedly connected to the bottom wall of the inner side of the second connecting ring 22. By fixing the first support plate 21 to the right side wall of the partition plate 15 and the right side wall of the inner side of the box 1, the top second connecting ring 22 is supported. The second connecting ring 22 is connected to the screen plate 23, so that the sludge enters the interior of the second connecting ring 22 after passing through the first guide plate 16 and falls onto the screen plate 23 to screen the sludge.

[0025] A fixing ring 24 is fixedly connected to the bottom outer side of the second connecting ring 22. A drain pipe 36 is connected through the right side wall of the second connecting ring 22. A second guide plate 37 is connected through the inside of the right side wall of the box 1. The bottom wall of the drain pipe 36 is located at the top of the second guide plate 37. A second support plate 25 is fixedly connected to the middle of the right side wall of the box 1 and the right side wall of the partition plate 15. A device box 26 is fixedly connected to the upper side wall of the second support plate 25. Springs 27 are fixedly connected inside the four device boxes 26. Each spring 27 has a mounting block 28 fixedly connected to its top. The tops of the four mounting blocks 28 are fixedly connected to the bottom wall of the fixing ring 24. The fixing ring 24 is connected to the bottom of the second connecting ring 22 via the mounting blocks 28 and the spring 27 inside the device box 26. The device box 26 is fixed to the second support plate 25, which is connected to the middle of the right side wall inside the box 1 and the right side wall of the partition plate 15 to support and connect the second support plate 25, thus providing bottom support for the device at the top. The spring 27 acts as a buffer and stabilizer for vibration, making the vibration of the second connecting ring 22 smooth and continuous. During vibration, the sieve plate 23 fixed to the bottom wall inside the second connecting ring 22 further filters and dewaters the sludge that flows in after the initial mud-water separation. Connecting columns 29 are fixedly connected to both the front and rear side walls of the second connecting ring 22.

[0026] like Figure 1 - Figure 8As shown, a base plate 30 is fixedly connected to the right side wall of the housing 1. An outer casing 31 is threadedly connected to the top of the base plate 30. A bidirectional motor 32 is installed inside the outer casing 31. Two second rotating rods 33 are fixedly connected to the front and rear output ends of the bidirectional motor 32. Eccentric wheels 34 are fixedly connected to the other ends of the two second rotating rods 33. Support rods 35 are rotatably connected to the outer walls of the two eccentric wheels 34. The left side of the two support rods 35 is rotatably connected to the outside of two connecting columns 29. The base plate 30 and the outer casing 31 provide external protection for the internal bidirectional motor 32. The bottom support, when the bidirectional motor 32 is started, the second rotating rod 33 on the front and rear output ends of the bidirectional motor 32 connects with the eccentric wheel 34 and drives the eccentric wheel 34 to rotate. In addition, due to its eccentric design, the eccentric wheel 34 will continuously change its contact position with the support rod 35 during rotation, thereby pushing the support rod 35 to swing back and forth on the outside of the connecting column 29. The left side of the support rod 35 is rotated and connected to the connecting column 29 on the front and rear side walls of the second connecting ring 22. Therefore, the swing of the support rod 35 will cause the second connecting ring 22 to vibrate up and down.

[0027] It should be noted that this utility model is a scraping sludge dewatering device. First, the drive motor 3, control panel 18, and bidirectional motor 32 are connected to an external power source to supply power to the device.

[0028] Sludge is conveyed into the housing 1 through the feed pipe 17. The feed pipe 17 is located on the left side of the housing 1, allowing the sludge to smoothly enter the device to begin the dewatering process. The drive motor 3, installed in the protective housing 2, starts. The protective housing 2 protects the drive motor 3 from damage caused by external factors. The output end of the drive motor 3 drives the first rotating rod 4 to rotate. The first rotating rod 4 is connected to the first connecting rod 5 on the left side inside the housing 1, so the first connecting rod 5 rotates accordingly. The first sprockets 6 are fixed to the outer sides of both the front and rear ends of the first connecting rod 5. When the first connecting rod 5 rotates, the first sprockets 6 rotate synchronously.

[0029] Because the first sprocket 6 meshes with the left side interior of the chain 7, the first sprocket 6 drives the chain 7 to move. At the same time, the second sprocket 9 on the second connecting rod 8, which is connected through the front and rear side walls inside the housing 1, meshes with the right side interior of the chain 7. The movement of the chain 7 drives the second sprocket 9 to rotate. As the second sprocket 9 rotates, through the connection of the first connecting ring 10, the connecting block 11, and the fixing plate 12, the scraper 13 will move along the movement trajectory of the chain 7.

[0030] When the scraper 13 moves, it pushes the sludge deposited on the guide plate 14, causing the sludge to slide to the left. When the scraper 13 slides upward from the left to the right, the right side of the scraper 13 contacts the first guide plate 16 at the top of the partition plate 15, and transports the sludge carried by the scraper 13 to the first guide plate 16. The first guide plate 16 guides the sludge to the right side of the tank 1 for further processing. After the scraper 13 contacts the first guide plate 16, the right side of the scraper 13 slides downward on the left side of the first guide plate 16 to scrape off the sticky sludge on the scraper 13 and enter the first guide plate 16 for guidance.

[0031] When the device is started, the control panel 18 acts as the control center, regulating the operating status of the bidirectional motor 32. The bidirectional motor 32 is installed inside the outer casing 31, which is threadedly connected to the base plate 30, which is fixed to the right side wall of the housing 1. After the bidirectional motor 32 starts, its two output ends drive the second rotating rod 33 to rotate synchronously. The eccentric wheel 34 fixed at the other end of the second rotating rod 33 then performs a circular motion. During the rotation of the eccentric wheel 34, due to its special eccentric structure, it continuously changes its contact position with the support rod 35, thereby pushing the support rod 35 to oscillate back and forth. The left side of the support rod 35 is rotatably connected to the connecting posts 29 on the front and rear side walls of the second connecting ring 22, so the oscillation of the support rod 35 will cause the second connecting ring 22 to vibrate up and down.

[0032] A fixing ring 24 is fixed to the outer bottom of the second connecting ring 22. The bottom of the fixing ring 24 is connected to a spring 27 inside the device box 26 via a mounting block 28. The device box 26 is fixed to the second support plate 25, which is connected to the middle of the right side wall inside the box 1 and the right side wall of the partition plate 15. The spring 27 acts as a buffer and stabilizer for vibration, making the vibration of the second connecting ring 22 smooth and continuous. During vibration, the sieve plate 23 fixed to the bottom wall inside the second connecting ring 22 further filters and dewaters the sludge that flows in after preliminary mud-water separation. Under the action of vibration and the sieve plate 23, the water in the sludge permeates downward through the sieve plate 23 and is discharged from the box 1 through the drain pipe 20.

[0033] The dewatered sludge remains on the sieve plate 23 and, with vibration, gradually moves towards the discharge pipe 36. The discharge pipe 36 penetrates the right side wall of the second connecting ring 22, and its bottom wall is located at the top of the second guide plate 37, which penetrates the interior of the right side wall of the housing 1. Finally, the dewatered sludge is discharged through the discharge pipe 36. During the discharge process, the second guide plate 37 guides the sludge smoothly out of the housing 1, completing the subsequent dewatering and discharge stages in the entire sludge dewatering treatment process.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A scraper-type sludge dewatering device, comprising a housing (1), characterized in that: A protective box (2) is fixedly connected to the front side wall of the box (1). A drive motor (3) is installed inside the protective box (2). A first rotating rod (4) is fixedly connected to the output end of the drive motor (3). A first connecting rod (5) is rotatably connected to the front and rear side walls of the left side of the box (1). The rear end of the first rotating rod (4) is fixedly connected to the front end of the first connecting rod (5). A first sprocket (6) is fixedly connected to the outer sides of both the front and rear ends of the first connecting rod (5). A chain (7) is installed on both the front and rear side walls of the box (1). The outer sides of the two first sprockets (6) mesh with the inner left side of the two chains (7). A second connecting rod (8) is connected through the front and rear side walls of the box (1). A second sprocket (9) is fixedly connected to the outer sides of both the front and rear ends of the two second connecting rods (8). The outer sides of the two second sprockets (9) mesh with the inner right side of the two chains (7).

2. The scraper-type sludge dewatering device according to claim 1, characterized in that: Two second sprockets (9) are fixedly connected to the outer side of a first connecting ring (10). A connecting block (11) is provided in the groove of the inner side wall of each of the two first connecting rings (10). A fixing plate (12) is fixedly connected to the inner side wall of each pair of connecting blocks (11). A scraper (13) is fixedly connected to the bottom of each fixing plate (12). A guide plate (14) is fixedly connected to the inner bottom wall of the box (1). The upper side wall of the guide plate (14) is correspondingly set with multiple scrapers (13).

3. The scraper-type sludge dewatering device according to claim 2, characterized in that: The box (1) is fixedly connected to a partition plate (15), and a first guide plate (16) is fixedly connected to the top of the partition plate (15). The left side wall of the first guide plate (16) is correspondingly arranged with multiple scrapers (13). A feed pipe (17) is connected through the left side of the box (1).

4. The scraper-type sludge dewatering device according to claim 1, characterized in that: A control panel (18) is fixedly connected to the left side of the front wall of the box (1), a dosing pipe (19) is connected through the top left side of the box (1), and drain pipes (20) are connected through the front and rear sides of the right side of the box (1).

5. The scraper-type sludge dewatering device according to claim 1, characterized in that: The inner right side wall of the box (1) and the right side wall of the partition plate (15) are fixedly connected to a first support plate (21). A second connecting ring (22) is provided on the top of the first support plate (21). A screen plate (23) is fixedly connected to the inner bottom wall of the second connecting ring (22). A fixing ring (24) is fixedly connected to the outer bottom of the second connecting ring (22). A sewage pipe (36) is connected through the right side wall of the second connecting ring (22). A second guide plate (37) is connected through the inside of the right side wall of the box (1). The bottom wall of the sewage pipe (36) is located on the top of the second guide plate (37).

6. The scraper-type sludge dewatering device according to claim 5, characterized in that: A second support plate (25) is fixedly connected to the middle of the right side wall of the inner side wall of the box (1) and the right side wall of the partition plate (15). A device box (26) is fixedly connected to the upper side wall of the second support plate (25). A spring (27) is fixedly connected inside the four device boxes (26). An installation block (28) is fixedly connected to the top of the four springs (27). The top of the four installation blocks (28) is fixedly connected to the bottom wall of the fixing ring (24). A connecting column (29) is fixedly connected to the front and rear side walls of the second connecting ring (22).

7. The scraper-type sludge dewatering device according to claim 1, characterized in that: A base plate (30) is fixedly connected to the right side wall of the box (1), and an outer box (31) is threadedly connected to the top of the base plate (30). A bidirectional motor (32) is installed inside the outer box (31), and a second rotating rod (33) is fixedly connected to both the front and rear output ends of the bidirectional motor (32).

8. The scraper-type sludge dewatering device according to claim 7, characterized in that: The other ends of the two second rotating rods (33) are fixedly connected to eccentric wheels (34), and the outer walls of the two eccentric wheels (34) are rotatably connected to support rods (35). The left inner side of the two support rods (35) is rotatably connected to the outside of the two connecting columns (29).

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