Wheel type chain scraper slagging-off equipment for mining
By introducing material feeding auxiliary mechanism and dust removal mechanism into the wheeled chain scraper slag removal equipment, the rolling and dust flying problems during the ore dumping process is solved, and the equipment efficiency and safety are improved.
Patent Information
- Application Number
- CN202422429419.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing wheeled chain scraper slag removal equipment can easily lead to mineral dumping and large pieces of mineral rolling down during the ore dumping process, affecting equipment efficiency and safety. At the same time, the flying of powdered ore materials affects working vision and operator health.
A slag removal equipment including a conveyor compartment, conveyor belt device, robotic arms, buckets, material conveyor auxiliary mechanism and dust removal mechanism are designed. The U-shaped movable rack and strip scraper of the material conveyor auxiliary mechanism are scraped flattened, and the dust removal mechanism absorbs dust to ensure the stable operation of the equipment and the safety of operators.
It effectively avoids the rolling and dust falling of minerals, improves the working efficiency and safety of the equipment, and ensures clear vision of the equipment and the health of the operators.
Smart Images

Figure CN223073502U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slag scraping equipment, in particular to a wheeled chain scraper slag scraping equipment for mine exploitation. Background Art
[0002] A slag scraping machine, also known as an excavating loader, combines a manipulator and a conveyor. The functions of slag scraping and conveying and loading are integrated into one. It adopts an electric full-hydraulic control system and production device, and has the characteristics of safety, environmental protection, low energy consumption and high efficiency. This machine is mainly used for the collection, conveying and loading of crushed stone and soil materials in some non-explosive dangerous mines such as phosphate mines and metal and non-metal mines with narrow production operation spaces and small production scales. When mining a mine, a slag scraping machine is usually used for work.
[0003] After the current wheeled chain scraper slag scraping equipment dumps the excavated ore onto the conveyor, the ore often piles up on the conveyor belt. During the process of the conveyor transporting the ore, the ore may collapse. And the large pieces of ore will roll down along the inclination angle of the conveyor. The rolling large pieces of ore may cause impact damage to both sides of the conveyor, and the continuous rolling of the large pieces of ore from the conveyor will also reduce the working efficiency of the entire wheeled chain scraper slag scraping equipment. At the same time, during the process of the bucket dumping the ore onto the conveyor, it will also cause the powdered ore to fly everywhere, which will affect the working vision of the wheeled chain scraper slag scraping equipment and also endanger the physical health of the operators near the slag scraping equipment.
[0004] Therefore, it is urgent to provide a wheeled chain scraper slag scraping equipment for mine exploitation to solve the above problems. Summary of the Utility Model
[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned shortcomings of the prior art and provide a wheeled chain scraper slag scraping equipment for mine exploitation.
[0006] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a wheeled chain scraper slag scraping equipment for mine exploitation, including a slag scraping equipment main body as an installation carrier. A conveying bin is arranged on the slag scraping equipment main body. A crawler sprocket drive device for driving the slag scraping equipment main body to move is arranged at the bottom of the slag scraping equipment main body. A conveyor belt device for conveying ore is installed at the bottom end inside the conveying bin. A plurality of retaining bars are evenly installed on the conveyor belt of the conveyor belt device. A robotic arm is installed at the middle position on the top of the slag scraping equipment main body, and a bucket for excavating ore is installed at one end of the robotic arm away from the slag scraping equipment main body. A material conveying auxiliary mechanism is arranged inside the conveying bin, and the material conveying auxiliary mechanism is located above the conveyor belt device. A dust removal mechanism is arranged on one side of the top of the conveying bin close to the bucket.
[0007] The utility model is further configured as follows: the material feeding auxiliary mechanism includes side baffles, which are provided with two groups of side baffles, and the two groups of side baffles are fixedly connected to the inner two ends of the conveying bin through a first connecting piece, U-shaped movable frames are symmetrically inserted on the two groups of side baffles, three groups of rotating shafts are commonly provided between the two groups of U-shaped movable frames, and strip scrapers are evenly installed on the outer sides of the rotating shafts, and a driving component for driving the three groups of rotating shafts to rotate synchronously is provided on the outer side of the U-shaped movable frame, an electric push rod is hinged at the middle position of the outer sides of the two groups of side baffles, and the output end of the electric push rod is hinged to one side of an adjacent group of U-shaped movable frames, and two groups of arc-shaped through holes that cooperate with the rotating shafts are symmetrically opened on the inner sides of the two groups of side baffles.
[0008] Through the above technical solution, the electric push rod is controlled to shorten, so that the two groups of U-shaped movable frames rotate with the middle group of rotating shafts as the axis. At this time, the heights of the three groups of rotating shafts gradually decrease from one side of the bucket to the other side, and the two groups of rotating shafts on both sides move inside the arc-shaped through hole. Then, the servo motor is controlled to drive the middle group of rotating shafts to rotate, and the middle group of rotating shafts drives the other two groups of rotating shafts to rotate synchronously through the transmission assembly. The rotating rotating shafts cooperate with the strip scraper to gradually scrape the minerals on the conveyor belt device flat.
[0009] The utility model is further configured as follows: the dust removal mechanism includes a U-shaped fixing frame, the two ends of the bottom of the U-shaped fixing frame are fixedly connected to the two ends of the top of the conveying bin, an installation bin is opened at the inner top of the U-shaped fixing frame, air inlet holes are evenly opened at the bottom of the installation bin, two groups of installation frames inserted into the interior of the installation bin are provided at one end of the U-shaped fixing frame, and a filter is installed inside the installation frame, an exhaust fan is installed on the top of the installation bin, and the installation frame is fixedly connected to the outer side of the U-shaped fixing frame through a second connecting piece.
[0010] Through the above technical solution, the exhaust fan is controlled to discharge the air in the installation bin to the outside, so that the flying dust under the U-shaped fixing frame is sucked into the interior of the installation bin through the air inlet hole. During the process, it is filtered by two sets of filter nets, so that the dust adheres to the bottom of the two sets of filter nets. The installation frame is regularly pulled out from the interior of the installation bin, and the filter net inside the installation frame is cleaned.
[0011] The utility model is further configured as follows: the driving assembly includes a servo motor that provides driving force, the servo motor is located at the middle position of the outer side of a group of U-shaped movable frames, the output end of the servo motor is transmission-connected to one end of a middle group of rotating shafts, and the ends of the three groups of rotating shafts away from the servo motors are transmission-connected through a transmission assembly.
[0012] Through the above technical solution, the servo motor is controlled to drive the middle set of rotating shafts to rotate, and the middle set of rotating shafts drives the other two sets of rotating shafts to rotate synchronously and in the same direction through the transmission assembly, so that the multiple sets of strip-shaped scrapers on the three sets of rotating shafts gradually level the minerals on the conveyor belt device.
[0013] The present utility model is further configured as: the transmission assembly includes a first gear. One end of the three sets of rotating shafts away from the servo motor extends to the outside of the U-shaped movable frame and is installed with a first gear. Two sets of second gears are arranged on the outside of one U-shaped movable frame, and the two sets of second gears are respectively meshed with the three sets of first gears.
[0014] Through the above technical solution, the servo motor is controlled to drive the middle set of rotating shafts to rotate, and the middle set of rotating shafts drives the other two sets of rotating shafts to rotate synchronously and stably in the same direction in cooperation with the first gear and the second gear.
[0015] The present utility model is further configured as: the first connecting member includes a fixing screw. Three pairs of fixing screws are installed on the outside of the side baffle, and the three pairs of fixing screws extend to the outside of the conveying bin and are threadedly installed with fixing nuts.
[0016] Through the above technical solution, by passing the three pairs of fixing screws on the outside of the side baffle through the fixing holes at both ends of the conveying bin and extending them to the outside of the conveying bin, and then threadedly installing fixing nuts on the outside of the fixing screws, the side baffle can be fixedly connected to the inner wall of the conveying bin in this way.
[0017] The present utility model is further configured as: the second connecting member includes a connecting screw. Two sets of connecting screws are symmetrically installed on both sides of one end of the U-shaped fixing frame, and the two sets of connecting screws at the same height pass through both sides of the installation frame and are threadedly provided with wing nuts.
[0018] Through the above technical solution, when the installation frame is inserted into the inside of the installation bin from one end of the U-shaped fixing frame, after the installation frame is completely inserted, the connecting screws pass through the fixing holes at both ends of the outside of the installation frame, and then wing nuts are threadedly installed on the outside of the connecting screws, so as to fixedly install the installation frame inside the installation bin.
[0019] The present utility model is further configured as: connecting bearings are symmetrically installed on the inner sides of the two sets of side baffles, and both ends of the outside of the middle set of rotating shafts are fixedly connected to the inner rings of the two sets of connecting bearings.
[0020] Through the above technical solution, it helps to drive the two sets of U-shaped movable frames to rotate around the middle set of rotating shafts during the telescopic process of the electric push rod, and the connecting bearings help to improve the rotation stability of the middle set of rotating shafts.
[0021] The beneficial effects of the present utility model are as follows:
[0022] 1. The utility model drives the U-shaped movable frame to rotate around the middle set of rotating shafts by controlling the telescopic movement of the electric push rod. Then, the two U-shaped movable frames drive the three sets of rotating shafts to move, making the three sets of rotating shafts not at the same height. After that, it is possible to control the synchronous rotation of the three sets of rotating shafts at different heights and the strip-shaped scrapers on the rotating shafts to gradually level the minerals passing under the three sets of rotating shafts on the conveyor belt device. In this way, it can avoid the large minerals rolling down and hitting the inner side of the conveying bin due to excessive accumulation of the minerals transported on the conveyor belt device, causing damage to the conveying bin or the conveyor belt device, ensuring the stability of the slag scraping equipment during the mineral transportation process, and also evenly transporting the minerals excavated by the bucket to the designated position through the conveyor belt device, ensuring the working efficiency of the entire slag scraping equipment.
[0023] 2. After the mechanical arm cooperates with the bucket to excavate and dump the minerals on one side of the top of the conveyor belt device, controlling the dust removal mechanism can suck in and filter the powdered minerals flying everywhere during the process of the bucket dumping the minerals, avoiding the powdered minerals flying everywhere from blocking the working vision of the slag scraping equipment. Moreover, the dust removal mechanism covers the three sets of rotating shafts. During the process of the rotating strip-shaped scrapers leveling the piled-up minerals on the conveyor belt device, dust will also fly. At this time, the dust removal mechanism can also suck in and filter the dust generated during this process, thus fully ensuring the physical health of the staff near the slag scraping equipment. Description of the Drawings
[0024] Figure 1 is a three-dimensional schematic diagram of the utility model;
[0025] Figure 2 is the front view of the utility model;
[0026] Figure 3 is a top view schematic diagram of the conveying bin of the utility model;
[0027] Figure 4 is a top view schematic diagram of the conveying bin of the utility model after removing the U-shaped fixing frame;
[0028] Figure 5 is a top view schematic diagram of the U-shaped fixing frame of the utility model;
[0029] Figure 6 is a three-dimensional schematic diagram of the connection between the U-shaped movable frame and the rotating shaft of the utility model;
[0030] Figure 7 is a partial side view schematic diagram of the side baffle of the utility model;
[0031] Figure 8 is Figure 4 the enlarged schematic diagram at A in
[0032] In the figure: 10 is the main body of the slag scraping equipment; 11 is the conveying bin; 12 is the conveyor belt device; 13 is the robotic arm; 14 is the bucket; 15 is the crawler sprocket drive device; 16 is the retaining strip; 20 is the auxiliary feeding mechanism; 21 is the side baffle; 22 is the first connecting member, including fixing screw 221 and fixing nut 222; 23 is the U-shaped movable frame; 24 is the rotating shaft; 25 is the strip-shaped scraper; 26 is the transmission assembly, including first gear 261 and second gear 262; 27 is the servo motor; 28 is the electric push rod; 29 is the arc-shaped through hole; 30 is the dust removal mechanism; 31 is the U-shaped fixing frame; 32 is the installation bin; 33 is the exhaust fan; 34 is the installation frame; 35 is the filter screen; 36 is the second connecting member, including connecting screw 361 and wing nut 362. Detailed implementation mode
[0033] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.
[0034] Please refer to Figure 1 - Figure 8 , a wheeled chain scraper slag scraping equipment for mine exploitation, including the main body 10 of the slag scraping equipment as the installation carrier. There is a conveying bin 11 arranged on the main body 10 of the slag scraping equipment. At the bottom of the main body 10 of the slag scraping equipment, there is a crawler sprocket drive device 15 for driving the main body 10 of the slag scraping equipment to move. At the bottom end inside the conveying bin 11, there is a conveyor belt device 12 for conveying ore. On the conveyor belt of the conveyor belt device 12, retaining strips 16 are evenly installed. At the middle position on the top of the main body 10 of the slag scraping equipment, there is a robotic arm 13 installed, and at one end of the robotic arm 13 away from the main body 10 of the slag scraping equipment, there is a bucket 14 for excavating ore. Inside the conveying bin 11, there is an auxiliary feeding mechanism 20, and the auxiliary feeding mechanism 20 is located above the conveyor belt device 12. On one side of the top of the conveying bin 11 close to the bucket 14, there is a dust removal mechanism 30. Through the auxiliary feeding mechanism 20, the minerals passing under the three rotating shafts 24 on the conveyor belt device 12 are gradually leveled by the rotating strip-shaped scraper 25. In this way, it can avoid the large minerals rolling down and hitting the inner side of the conveying bin 11 due to excessive accumulation of the minerals conveyed on the conveyor belt device 12, causing damage to the conveying bin 11 or the conveyor belt device 12, and ensuring the stability of the slag scraping equipment during the process of conveying minerals. Then, by controlling the dust removal mechanism 30, the powdered minerals flying everywhere during the process of the bucket 14 dumping minerals can be sucked in and filtered, avoiding the powdered minerals flying everywhere from blocking the working vision of the slag scraping equipment.
[0035] Such as Figure 3 - Figure 4 And Figure 6 - Figure 8As shown, the feeding auxiliary mechanism 20 includes a side baffle 21, and the side baffle 21 is provided with two groups, and the two groups of side baffles 21 are fixedly connected to the inner ends of the conveying bin 11 through a first connecting member 22, and the first connecting member 22 includes a fixing screw 221, and three pairs of fixing screws 221 are installed on the outer side of the side baffle 21, and the three pairs of fixing screws 221 extend to the outer side of the conveying bin 11 and are threadedly installed with fixing nuts 222, and U-shaped movable frames 23 are symmetrically inserted on the two groups of side baffles 21, and three groups of rotating shafts 24 are commonly provided between the two groups of U-shaped movable frames 23. , and strip scrapers 25 are evenly installed on the outside of the rotating shaft 24, and a driving assembly for driving the three sets of rotating shafts 24 to rotate synchronously is arranged on the outside of the U-shaped movable frame 23. An electric push rod 28 is hinged at the middle position of the outer side of the two sets of side baffles 21, and the output end of the electric push rod 28 is hinged to one side of the adjacent set of U-shaped movable frames 23. Two sets of arc through holes 29 that cooperate with the rotating shaft 24 are symmetrically opened on the inner side of the two sets of side baffles 21. The driving assembly includes a servo motor 27 that provides driving force. The servo motor 27 is located at a set of U-shaped movable frames 23. At the middle position of the outer side, the output end of the servo motor 27 is transmission-connected with one end of the middle group of rotating shafts 24, and the ends of the three groups of rotating shafts 24 away from the servo motor 27 are transmission-connected through the transmission assembly 26, and the transmission assembly 26 includes a first gear 261, and the ends of the three groups of rotating shafts 24 away from the servo motor 27 extend to the outer side of the U-shaped movable frame 23 and are installed with the first gear 261, and the outer side of one group of U-shaped movable frames 23 is provided with two groups of second gears 262, and the two groups of second gears 262 are respectively meshed with the three groups of first gears 261. The electric push rod 28 is controlled to be shortened, so that the two groups of U-shaped movable frames 23 rotate with the middle group of rotating shafts 24 as the axis. At this time, the heights of the three groups of rotating shafts 24 gradually decrease from one side of the bucket 14 to the other side, and the two groups of rotating shafts 24 on both sides move inside the arc-shaped through hole 29. Then, the servo motor 27 is controlled to drive the middle group of rotating shafts 24 to rotate, and the middle group of rotating shafts 24 drives the other two groups of rotating shafts 24 to rotate synchronously through the transmission assembly 26. The rotating rotating shafts 24 cooperate with the strip scraper 25 to gradually scrape the minerals on the conveyor belt device 12 flat.
[0036] like Figure 3 - Figure 5As shown in the figure, the dust removal mechanism 30 includes a U-shaped fixing frame 31. The two ends of the bottom of the U-shaped fixing frame 31 are fixedly connected to the two ends of the top of the conveying bin 11. An installation bin 32 is opened at the inner top of the U-shaped fixing frame 31. Air inlet holes are evenly opened at the bottom end of the installation bin 32. Two groups of installation frames 34 inserted into the interior of the installation bin 32 are arranged at one end of the U-shaped fixing frame 31, and filter nets 35 are installed inside the installation frames 34. An exhaust fan 33 is installed at the top of the installation bin 32. The installation frames 34 are fixedly connected to the outside of the U-shaped fixing frame 31 through second connecting parts 36. The second connecting parts 36 include connecting screws 361. Two groups of connecting screws 361 are symmetrically installed on both sides of one end of the U-shaped fixing frame 31. The two groups of connecting screws 361 at the same height pass through both sides of the installation frame 34 and are threadedly provided with wing nuts 362. When inserting the installation frame 34 into the interior of the installation bin 32 from one end of the U-shaped fixing frame 31, after the installation frame 34 is completely inserted, the connecting screws 361 also pass through the fixing holes at both outer ends of the installation frame 34, and then wing nuts 362 are threadedly installed on the outside of the connecting screws 361, thereby fixedly installing the installation frame 34 inside the installation bin 32. Then, control the exhaust fan 33 to discharge the air inside the installation bin 32 to the outside, so that the flying dust below the U-shaped fixing frame 31 is sucked into the interior of the installation bin 32 and filtered by the two groups of filter nets 35 during the process, so that the dust adheres to the bottom of the two groups of filter nets 35. Regularly pull out the installation frame 34 from the interior of the installation bin 32 and clean the filter nets 35 inside the installation frame 34.
[0037] When the utility model is in use, control the robotic arm 13 to cooperate with the bucket 14 to dig out the minerals in front of the wheeled chain scraper slag removal equipment and pour them on one side of the conveyor belt device 12 close to the bucket 14. Then control the conveyor belt device 12 to convey the minerals to the loading vehicle. During the process, control the electric push rod 28 to shorten, so that the two groups of U-shaped movable frames 23 rotate around the middle rotating shaft 24 as the axis. At this time, the heights of the three rotating shafts 24 gradually decrease from one side of the bucket 14 to the other side, and the two groups of rotating shafts 24 on both sides move inside the arc-shaped through holes 29. Then control the servo motor 27 to drive the middle rotating shaft 24 to rotate, and the middle rotating shaft 24 drives the other two groups of rotating shafts 24 to rotate synchronously through the transmission assembly 26. The rotating rotating shafts 24 cooperate with the strip-shaped scrapers 25 to gradually level the minerals on the conveyor belt device 12. At the same time, control the exhaust fan 33 to discharge the air inside the installation bin 32 to the outside, so that the flying dust below the U-shaped fixing frame 31 is sucked into the interior of the installation bin 32 and filtered by the two groups of filter nets 35. Regularly unscrew the wing nuts 362, pull out the two groups of installation frames 34 from one end of the installation bin 32 and clean them.
[0038] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.
Claims
1. A wheeled chain scraper slag removal device for mining, comprising a slag removal device body (10) as a mounting carrier, characterized in that: A slag scraping device main body (10) is provided with a conveying bin (11). A crawler sprocket driving device (15) for driving the slag scraping device main body (10) to move is arranged at the bottom of the slag scraping device main body (10). A conveyor belt device (12) for conveying ore is installed at the bottom end inside the conveying bin (11). Barriers (16) are evenly installed on the conveyor belt of the conveyor belt device (12). A robotic arm (13) is installed at the middle position on the top of the slag scraping device main body (10), and a bucket (14) for excavating ore is installed at one end of the robotic arm (13) away from the slag scraping device main body (10). A material conveying auxiliary mechanism (20) is arranged inside the conveying bin (11), and the material conveying auxiliary mechanism (20) is located above the conveyor belt device (12). A dust removal mechanism (30) is arranged on one side of the top of the conveying bin (11) close to the bucket (14).
2. The wheeled chain scraper slag removal equipment for mine exploitation according to claim 1, wherein: The material conveying auxiliary mechanism (20) includes side baffles (21). There are two groups of side baffles (21), and the two groups of side baffles (21) are fixedly connected to the inner two ends of the conveying bin (11) through first connecting pieces (22). U-shaped movable frames (23) are symmetrically inserted on the two groups of side baffles (21). Three rotating shafts (24) are jointly arranged between the two groups of U-shaped movable frames (23), and strip-shaped scraping plates (25) are evenly installed on the outer sides of the rotating shafts (24). A driving component for driving the three rotating shafts (24) to rotate synchronously is arranged on the outer side of the U-shaped movable frame (23). Electric push rods (28) are hinged at the middle positions on the outer sides of the two groups of side baffles (21), and the output ends of the electric push rods (28) are hinged to one side of an adjacent group of U-shaped movable frames (23). Two arc-shaped through holes (29) that cooperate with the rotating shafts (24) are symmetrically formed on the inner sides of the two groups of side baffles (21).
3. A wheeled chain scraper slag scraping device for mine exploitation according to claim 1, characterized in that: The dust removal mechanism (30) includes a U-shaped fixing frame (31). The two ends of the bottom of the U-shaped fixing frame (31) are fixedly connected to the two ends of the top of the conveying bin (11). An installation bin (32) is formed at the inner top of the U-shaped fixing frame (31). Air inlet holes are evenly formed at the bottom end of the installation bin (32). Two installation frames (34) inserted into the installation bin (32) are arranged at one end of the U-shaped fixing frame (31), and a filter screen (35) is installed inside the installation frames (34). An exhaust fan (33) is installed at the top of the installation bin (32). The installation frames (34) are fixedly connected to the outer side of the U-shaped fixing frame (31) through second connecting pieces (36).
4. A wheeled chain scraper slag scraping device for mine exploitation according to claim 2, characterized in that: The driving component includes a servo motor (27) that provides driving force. The servo motor (27) is located at the middle position on the outer side of a group of U-shaped movable frames (23). The output end of the servo motor (27) is in transmission connection with one end of the middle rotating shaft (24). The three rotating shafts (24) are in transmission connection through a transmission component (26) at the ends away from the servo motor (27).
5. A wheeled chain scraper slag scraping device for mine development according to claim 4, characterized in that: The transmission assembly (26) includes a first gear (261). One end of the three groups of rotating shafts (24) far from the servo motor (27) extends to the outside of the U-shaped movable frame (23) and is provided with a first gear (261). Two second gears (262) are arranged on the outside of one group of U-shaped movable frames (23), and the two second gears (262) are respectively meshed with the three groups of first gears (261).
6. The wheeled chain scraper slag scraping equipment for mine exploitation according to claim 2, characterized in that: The first connecting member (22) includes a fixing screw (221). Three pairs of fixing screws (221) are installed on the outside of the side baffle (21), and the three pairs of fixing screws (221) extend to the outside of the conveying bin (11) and are threadedly installed with fixing nuts (222).
7. A wheeled chain scraper slag-dredging device for mine exploitation according to claim 3, characterized in that: The second connecting member (36) includes a connecting screw (361). Two groups of connecting screws (361) are symmetrically installed on both sides of one end of the U-shaped fixing frame (31), and the two groups of connecting screws (361) at the same height pass through both sides of the installation frame (34) and are threadedly provided with wing nuts (362).
8. The wheeled chain scraper slag scraping equipment for mine exploitation according to claim 2, characterized in that: Connecting bearings are symmetrically installed on the inner sides of the two groups of side baffles (21), and the two ends of the outer side of the middle group of rotating shafts (24) are respectively fixedly connected to the inner rings of the two groups of connecting bearings.