Rotary screening machine with rotary blowing device for screening powder

Abstract

The utility model discloses a rotary screening machine with a rotary blowing device for screening powder, which comprises a rotary screening device and a rotary blowing device, and a cylindrical screen distributed along a first direction is arranged in the rotary screening device; the rotary air blowing device comprises a hollow ventilation cylinder and an air compressor which are arranged in the first direction, one end of the hollow ventilation cylinder is connected with the air compressor, the other end of the hollow ventilation cylinder extends into the cylindrical screen, a plurality of air blowing openings are formed in the side wall of the hollow ventilation cylinder, and air is pressurized through the air compressor and then fed into the hollow ventilation cylinder. And the powder is blown out at high pressure through the plurality of air blowing ports, so that the high-pressure air flow directly acts on the powder in the cylindrical screen mesh, the powder is disturbed and pushed to keep a flowing state, powder accumulation caused by static or gravity action is reduced, the powder is promoted to flow out through the cylindrical screen mesh, the phenomenon that the powder blocks the cylindrical screen mesh in the screening process is reduced, and the screening efficiency is improved. And the shutdown cleaning frequency caused by blockage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of powder screening machines, and more specifically to a rotary screening machine for screening powder with a rotary air blowing device. Background Art

[0002] Polyurethane materials are widely used in home furnishings, construction, automobiles, footwear, clothing, aerospace, healthcare and other fields due to their excellent physical and mechanical properties, good weather resistance, thermal insulation and processability. However, with the rapid growth of the polyurethane product market, the amount of polyurethane waste generated is also increasing rapidly. In addition, the stable structure of polyurethane materials and their service life of up to decades greatly increase the difficulty of their degradation and recycling, thus posing a potential threat to the environment.

[0003] The recycling of polyurethane waste is mainly divided into three methods: physical recycling, chemical recycling and energy recovery. Among them, physical recycling includes crushing and screening methods. Powdering waste polyurethane products, screening the powder with different mesh sizes and backfilling the powder is a common recycling method.

[0004] During the polyurethane foam recycling process, powder cannot be evenly distributed within the screen during screening, resulting in localized accumulation. This severely hinders the efficient passage of powder through the screen and becomes a major obstacle to improving milling efficiency. This is primarily due to the lightweight, porous, and easily deformable nature of polyurethane foam, which makes it prone to compaction and agglomeration during mechanical handling. This phenomenon not only increases the operating burden and energy consumption of the equipment, but also may induce the risk of equipment blockage and other failures, posing a threat to the continuity and stability of the production process. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a rotary screening machine for screening powder with a rotary blowing device, so as to solve the problem that the existing screening machine easily causes powder accumulation during the powder screening process.

[0006] The technical solution of the utility model is as follows: A rotary screening machine for screening powder with a rotary blowing device, comprising:

[0007] A rotary screening device, wherein the rotary screening device is provided with a cylindrical screen arranged along a first direction;

[0008] A rotary blowing device, the rotary blowing device includes a hollow air cylinder and an air compressor arranged along a first direction, one end of the hollow air cylinder is connected to the air compressor, and the other end of the hollow air cylinder extends into the cylindrical screen, and the side wall of the hollow air cylinder is provided with multiple blowing ports, and the air compressor is used to pressurize the air and pass it into the hollow air cylinder so that the high-pressure gas is blown into the cylindrical screen through the blowing port.

[0009] Furthermore, a feed port and a screw conveyor are provided at one end of the rotary screening device, and a first discharge port and a second discharge port are provided below the rotary screening device. The first discharge port and the second discharge port are arranged in sequence along the first direction, and the screw conveyor is used to push the powder entering from the feed port into the cylindrical screen.

[0010] Furthermore, the rotary screening device includes a shell, a first drive motor, a driven gear and a retaining frame. The cylindrical screen is arranged in the shell and is connected to the driven gear. The first drive motor is arranged on one side of the shell. The driven gear is meshed and connected with the driving gear at the output end of the first drive motor. The first drive motor drives the cylindrical screen to rotate through the driven gear. One end of the retaining frame is connected to the screw conveyor, and the other end of the retaining frame is connected to the hollow ventilation cylinder.

[0011] Furthermore, the retaining frame includes four columns and a bearing seat, the four columns are arranged on one side of the bearing seat, and there is a gap between two adjacent columns to allow powder to enter the cylindrical screen, and the end of the hollow air cylinder away from the air compressor is sleeved in the bearing seat so that the hollow air cylinder can rotate clockwise or counterclockwise.

[0012] Furthermore, the inner wall of the cylindrical screen is provided with an internal thread for pushing the powder, and the cylindrical screen includes a screening section and a discharge section arranged in sequence along the moving direction of the powder, and the screening section is provided with a plurality of evenly distributed screening holes, the first discharge port is located below the screening section, the discharge section is provided with a plurality of discharge holes, and the second discharge port is located below the discharge section.

[0013] Furthermore, a first partition plate, a second partition plate and a third partition plate are provided in the shell, and the first partition plate, the second partition plate and the third partition plate divide the shell into a first chamber and a second chamber that are independent of each other, the first chamber is connected to the first discharge port, and the second chamber is connected to the second discharge port.

[0014] Furthermore, the front, middle and rear parts of the cylindrical screen are respectively provided with a first annular fitting portion, a second annular fitting portion and a third annular fitting portion extending radially outward and protruding along the cylindrical screen. The first annular fitting portion is matched and connected with the first partition plate, the second annular fitting portion is matched with the second partition plate, and the third annular fitting portion is matched with the third partition plate.

[0015] Furthermore, it also includes a frame, a guide rod is fixedly installed on the frame, a guide groove is provided at the bottom of the screw conveyor, and at least a part of the guide rod is located in the guide groove.

[0016] Furthermore, the screw feeder includes a casing, a conveying screw and a servo motor. The conveying screw is arranged in the casing and connected to the servo motor. The conveying screw is driven by the servo motor to push the powder into the cylindrical screen.

[0017] Furthermore, the rotary blowing device further comprises a rotary motor, and the rotary motor is used to drive the hollow ventilation cylinder to rotate in a clockwise or counterclockwise direction.

[0018] The utility model according to the above scheme has the following beneficial effects: a rotary screening machine for screening powder with a rotary blowing device comprises a rotary screening device and a rotary blowing device, wherein a cylindrical screen arranged along a first direction is provided in the rotary screening device; the rotary blowing device comprises a hollow ventilation cylinder and an air compressor arranged along the first direction, one end of the hollow ventilation cylinder is connected to the air compressor, and the other end of the hollow ventilation cylinder extends into the cylindrical screen, and a plurality of blowing ports are provided on the side wall of the hollow ventilation cylinder, and air is pressurized by the air compressor and sent into the hollow ventilation cylinder, and blown out at high pressure through the plurality of blowing ports, so that the high-pressure airflow directly acts on the powder in the cylindrical screen, thereby disturbing and pushing the powder to keep it in a flowing state, reducing the accumulation of powder caused by stillness or gravity, and prompting the powder to flow out through the cylindrical screen, reducing the phenomenon of powder clogging the cylindrical screen during the screening process, reducing the frequency of shutdown and cleaning due to blockage, improving the continuous operation capacity of the equipment, and thus improving the screening efficiency and screening quality. Secondly, the hollow ventilation cylinder is arranged along the first direction, which is consistent with the arrangement direction of the cylindrical screen, so that the high-pressure airflow blown out from the blowing port of the hollow ventilation cylinder can fully blow away the powder in the cylindrical screen, avoiding excessive accumulation of powder in local areas of the cylindrical screen, thereby improving the overall screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the rotary screening machine for screening powder in an embodiment of the present utility model;

[0021] Figure 2 This is a front view of a rotary screening machine for screening powder in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of a rotary screening machine for screening powder in an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 A local enlarged schematic diagram;

[0024] Figure 5 for Figure 3 B is a partial enlarged schematic diagram;

[0025] Figure 6 for Figure 3 C is a partial enlarged schematic diagram.

[0026] In the figure, 1, rotary screening device; 11, cylindrical screen; 111, internal thread; 112, screening section; 1121, screening hole; 113, discharge section; 1131, discharge hole; 121, feed port; 122, first discharge port; 123, second discharge port; 13, housing; 14, first drive motor; 141, driving gear; 15, driven gear; 16, retaining frame; 161, column; 162, bearing seat; 163, gap; 17 1. First partition plate; 172. Second partition plate; 173. Third partition plate; 181. First chamber; 182. Second chamber; 191. First annular fitting portion; 192. Second annular fitting portion; 193. Third annular fitting portion; 2. Rotary blowing device; 21. Hollow air cylinder; 211. Blowing port; 22. Air compressor; 3. Screw feeder; 31. Casing; 32. Conveying screw; 33. Servo motor; 4. Frame; 5. Guide rod. DETAILED DESCRIPTION

[0027] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments.

[0028] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments:

[0029] See also Figures 1 and 2 As shown, the present embodiment provides a rotary screening machine for screening powder with a rotary blowing device, comprising a rotary screening device 1 and a rotary blowing device 2, wherein the rotary screening device 1 is provided with a cylindrical screen 11 arranged along a first direction; the rotary blowing device 2 comprises a hollow air cylinder 21 and an air compressor 22 arranged along the first direction, one end of the hollow air cylinder 21 is connected to the air compressor 22, and the other end of the hollow air cylinder 21 extends into the cylindrical screen 11, and a plurality of blowing ports 211 are provided on the side wall of the hollow air cylinder 21, and the air compressor 22 is used to pressurize the air and pass it into the hollow air cylinder 21, so that the high-pressure gas is blown into the cylindrical screen 11 through the blowing port 211. In this embodiment, the first direction is the horizontal direction, and the hollow ventilation cylinder 21 is arranged along the first direction, which is consistent with the arrangement direction of the cylindrical screen 11, so that the high-pressure airflow blown out from the blowing port of the hollow ventilation cylinder 21 can fully blow away the powder in the cylindrical screen 11, avoiding excessive accumulation of powder in local areas of the cylindrical screen 11, thereby improving the overall screening efficiency.

[0030] Specifically, the rotary screening machine for powder screening with a rotary blowing device provided in this embodiment, air is pressurized by the air compressor 22 and then sent into the hollow ventilation cylinder 21, and is blown out at high pressure through multiple blowing ports 211, so that the high-pressure airflow directly acts on the powder in the cylindrical screen 11, thereby disturbing and pushing the powder to keep it in a flowing state, reducing the accumulation of powder due to stillness or gravity, and prompting the powder to flow out through the cylindrical screen 11, reducing the phenomenon of powder clogging the cylindrical screen 11 during the screening process, reducing the frequency of shutdown and cleaning due to blockage, and improving the continuous operation capacity of the equipment, thereby improving the screening efficiency and screening quality.

[0031] See also Figure 1 As shown, a feed port 121 and a screw conveyor 3 are provided at one end of the rotary screening device 1, and a first discharge port 122 and a second discharge port 123 are provided below the rotary screening device 1. The first discharge port 122 and the second discharge port 123 are arranged sequentially along a first direction, and the screw conveyor 3 is used to push the powder entering from the feed port 121 into the cylindrical screen 11. In this embodiment, the feed port 121 is a trumpet-shaped structure with a gradually decreasing diameter from top to bottom along the vertical direction. This design helps to gradually accelerate the flow rate of the powder, promote the smooth flow of the powder, and avoid clogging and stagnation of the powder in the feed port 121.

[0032] In this embodiment, the lower end of the feed port 121 is connected to the inner cavity of the screw conveyor 3, and the screw conveyor 3 is arranged in the horizontal direction. When the powder is poured into the feed port 121, the powder moves downward along the inner wall of the feed port 121 under the action of gravity to enter the screw conveyor 3. This design allows the powder to enter the cylindrical screen 11 at a stable speed and flow rate under the push of gravity and the screw conveyor 3, avoiding the decrease in screening efficiency due to uneven feeding or blockage.

[0033] In this embodiment, the rotary screening device 1 includes a housing 13, a first drive motor 14, a driven gear 15 and a retaining frame 16. The cylindrical screen 11 is arranged in the housing 13, and the cylindrical screen 11 is connected to the driven gear 15. The first drive motor 14 is arranged on one side of the housing 13. The driven gear 15 is meshed with the driving gear 141 at the output end of the first drive motor 14. The first drive motor 14 drives the cylindrical screen 11 to rotate through the driven gear 15. One end of the retaining frame 16 is connected to the screw feeder 3, and the other end of the retaining frame 16 is connected to the hollow ventilation cylinder 21.

[0034] Specifically, a driving gear 141 is provided at one end of the first drive motor 14, and the driving gear 141 is meshed and connected with the driven gear 15. The cylindrical screen 11 obtains different torques and speeds from the driven gear 15 to which it is connected. The cylindrical screen 11 rotates, so that the powder entering the cylindrical screen 11 is evenly distributed on the cylindrical screen 11, reducing the local accumulation of powder on the cylindrical screen 11. At the same time, the rotational motion promotes the relative movement between the powder particles, increases the chances of collision and friction between the powder particles and the screen holes, and helps the fine powder particles to be quickly separated through the cylindrical screen 11, thereby improving the screening efficiency.

[0035] It is worth mentioning that the above-mentioned structural design can adjust the rotation speed, rotation angle and rotation direction of the cylindrical screen 11 according to the actual powder property requirements. In this embodiment, the driving method of the cylindrical screen 11 is not limited to gear transmission, but can also be chain transmission or belt transmission.

[0036] In this embodiment, the retaining frame 16 includes four columns 161 and a bearing seat 162. The four columns 161 are arranged on one side of the bearing seat 162, and there is a gap 163 between two adjacent columns 161 to allow powder to enter the cylindrical screen 11. The end of the hollow air cylinder 21 away from the air compressor 22 is sleeved in the bearing seat 162 so that the hollow air cylinder 21 can rotate clockwise or counterclockwise. With this design, the bearing seat 162 is used to provide support and positioning for the left end of the hollow air cylinder 21, and a rotating motor is set at the right end of the hollow air cylinder 21. The rotating motor is connected to the right end of the hollow air cylinder 21 to provide support and positioning for the right end of the hollow air cylinder 21. At the same time, the rotating motor can drive the hollow air cylinder 21 to rotate in a clockwise or counterclockwise direction. The rotational motion of the hollow air cylinder 21 not only makes the airflow more evenly distributed on the cylindrical screen 11, but also pushes the powder particles toward the cylindrical screen 11 through the action of centrifugal force, further promoting the screening process and significantly improving the screening efficiency.

[0037] In this embodiment, the transmission method between the rotating motor and the hollow breather cylinder 21 is gear transmission. Of course, the transmission method between the rotating motor and the hollow breather cylinder 21 is not limited to gear transmission and can also be chain transmission or belt transmission. It should be noted that gear transmission, chain transmission, and belt transmission are conventional technical means in the field and therefore will not be further described in this embodiment.

[0038] Preferably, the inner wall of the cylindrical screen 11 is provided with an internal thread 111 for pushing the powder. When the cylindrical screen 11 rotates, the internal thread 111 can convey and disperse the powder in the cylindrical screen 11 from left to right. The cylindrical screen 11 includes a screening section 112 and a discharge section 113 arranged in sequence along the direction of movement of the powder. The screening section 112 is provided with a plurality of evenly distributed screening holes 1121. The first discharge port 122 is located below the screening section 112. The discharge section 113 is provided with a plurality of discharge holes 1131. The second discharge port 123 is located below the discharge section 113.

[0039] In this embodiment, as the powder flows from left to right, some of the powder quickly and efficiently passes through the sieve holes 1121 of the sieving section 112 and enters the first discharge port 122 under the influence of gravity, the centrifugal force of the rotation of the cylindrical screen 11, and the pressure of the high-pressure gas discharged from the hollow vent 21, and finally exits the housing 13 from the first discharge port 122, thereby achieving the purpose of screening. Some larger powder particles are conveyed to the discharge section 113 and then, under the influence of gravity, enter the second discharge port 123 through the discharge hole 1131 of the discharge section 113 and finally exit the housing 13 from the second discharge port 123. The distribution of the multiple sieve holes 1121 can be one or more of an array, a random pattern, and a combination.

[0040] Preferably, a first partition plate 171, a second partition plate 172 and a third partition plate 173 are provided in the shell 13. The first partition plate 171, the second partition plate 172 and the third partition plate 173 divide the shell 13 into a first chamber 181 and a second chamber 182 which are independent of each other. The first chamber 181 is connected to the first discharge port 122, and the second chamber 182 is connected to the second discharge port 123. Specifically, the front, middle, and rear portions of the cylindrical screen 11 are sequentially provided with a first annular mating portion 191, a second annular mating portion 192, and a third annular mating portion 193 extending radially outward from the cylindrical screen 11. The first annular mating portion 191 is mated and connected to the first partition plate 171, the second annular mating portion 192 is mated with the second partition plate 172, and the gap between the second annular mating portion 192 and the second partition plate 172 is sealed with a sealing ring. The third annular mating portion 193 is mated with the third partition plate 173, and the gap between the third annular mating portion 193 and the third partition plate 173 is sealed with a sealing ring, thereby isolating the powder in the first chamber 181 from the powder in the second chamber 182 and preventing the powder in the housing 13 from flowing out of these gaps. The sealing method is not limited to a sealing ring, and can also be a felt ring seal, a tortuous seal, etc.

[0041] See also Figure 1 As shown, the rotary powder screening machine provided in this embodiment also includes a frame 4, on which a guide rod 5 is fixedly mounted. A guide groove is provided at the bottom of the screw conveyor 3, and at least a portion of the guide rod 5 is located within the guide groove. This design ensures the smooth movement of the screw conveyor 3 in the horizontal direction, facilitates adjustment of the installation position of the screw conveyor 3, and during installation, the cooperation between the guide rod 5 and the guide groove facilitates rapid positioning and installation.

[0042] In this embodiment, the screw feeder 3 includes a casing 31, a conveying screw 32 and a servo motor 33. The conveying screw 32 is arranged in the casing 31 and is connected to the servo motor 33. The conveying screw 32 is driven by the servo motor 33 to push the powder into the cylindrical screen 11.

[0043] It should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the application product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

[0045] The above is an exemplary description of the present utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the present utility model patent is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present utility model patent, or the concept and technical solution of the present utility model patent are directly applied to other occasions without improvement, they are all within the scope of protection of the present utility model.

Claims

1. A rotary sieving machine for sieving powder with a rotary blowing device, characterized in that: include: A rotary screening device (1), wherein a cylindrical screen (11) arranged along a first direction is provided in the rotary screening device (1); A rotary air blowing device (2) comprises a hollow air cylinder (21) and an air compressor (22) arranged along a first direction, one end of the hollow air cylinder (21) is connected to the air compressor (22), and the other end of the hollow air cylinder (21) extends into the cylindrical screen (11), a plurality of air blowing ports (211) are provided on the side wall of the hollow air cylinder (21), and the air compressor (22) is used to pressurize air and pass it into the hollow air cylinder (21), so that high-pressure gas is blown into the cylindrical screen (11) through the air blowing ports (211).

2. A rotary sieving machine for sieving powder with a rotary air blowing device according to claim 1, characterized in that: A feed port (121) and a screw conveyor (3) are provided at one end of the rotary screening device (1); a first discharge port (122) and a second discharge port (123) are provided below the rotary screening device (1); the first discharge port (122) and the second discharge port (123) are arranged in sequence along a first direction; the screw conveyor (3) is used to push the powder entering from the feed port (121) into the cylindrical screen (11).

3. A rotary sieving machine for powder screening with a rotary air blowing device according to claim 2, characterized in that: The rotary screening device (1) comprises a housing (13), a first drive motor (14), a driven gear (15) and a retaining frame (16); the cylindrical screen (11) is arranged in the housing (13), and the cylindrical screen (11) is connected to the driven gear (15); the first drive motor (14) is arranged on one side of the housing (13); the driven gear (15) is meshed and connected with a driving gear (141) at the output end of the first drive motor (14); the first drive motor (14) drives the cylindrical screen (11) to rotate through the driven gear (15); one end of the retaining frame (16) is connected to the screw conveyor (3), and the other end of the retaining frame (16) is connected to the hollow vent cylinder (21).

4. A rotary sieving machine for powder screening with a rotary air blowing device according to claim 3, characterized in that: The retainer (16) includes four columns (161) and a bearing seat (162). The four columns (161) are arranged on one side of the bearing seat (162), and there is a gap (163) between two adjacent columns (161) to allow powder to enter the cylindrical screen (11). The end of the hollow vent cylinder (21) away from the air compressor (22) is sleeved in the bearing seat (162) so that the hollow vent cylinder (21) can rotate clockwise or counterclockwise.

5. The rotary sieving machine for powder screening with a rotary air blowing device according to claim 2, characterized in that: The inner wall of the cylindrical screen (11) is provided with an internal thread (111) for pushing the powder. The cylindrical screen (11) includes a screening section (112) and a discharge section (113) sequentially arranged along the moving direction of the powder. The screening section (112) is provided with a plurality of evenly distributed screening holes (1121). The first discharge port (122) is located below the screening section (112). The discharge section (113) is provided with a plurality of discharge holes (1131). The second discharge port (123) is located below the discharge section (113).

6. The rotary sieving machine for powder screening with a rotary air blowing device according to claim 3, characterized in that: A first partition plate (171), a second partition plate (172) and a third partition plate (173) are provided in the shell (13); the first partition plate (171), the second partition plate (172) and the third partition plate (173) divide the shell (13) into a first chamber (181) and a second chamber (182) which are independent of each other; the first chamber (181) is connected to the first discharge port (122), and the second chamber (182) is connected to the second discharge port (123).

7. A rotary sieving machine for powder screening with a rotary air blowing device according to claim 6, characterized in that: The front, middle and rear parts of the cylindrical screen (11) are sequentially provided with a first annular fitting portion (191), a second annular fitting portion (192) and a third annular fitting portion (193) extending radially outward from the cylindrical screen (11), wherein the first annular fitting portion (191) is connected to the first partition plate (171), the second annular fitting portion (192) is connected to the second partition plate (172), and the third annular fitting portion (193) is connected to the third partition plate (173).

8. The rotary sieving machine for powder screening with a rotary air blowing device according to claim 2, characterized in that: It also includes a frame (4), on which a guide rod (5) is fixedly mounted. A guide groove is provided at the bottom of the screw conveyor (3), and at least a portion of the guide rod (5) is located in the guide groove.

9. The rotary sieving machine for powder screening with a rotary air blowing device according to claim 2, characterized in that: The screw conveyor (3) comprises a housing (31), a conveying screw (32) and a servo motor (33). The conveying screw (32) is arranged in the housing (31). The conveying screw (32) is connected to the servo motor (33). The conveying screw (32) is driven by the servo motor (33) to push the powder into the cylindrical screen (11).

10. The rotary sieving machine for powder screening with a rotary air blowing device according to claim 1, characterized in that: The rotary blowing device (2) further comprises a rotary motor, and the rotary motor is used to drive the hollow ventilation cylinder (21) to rotate in a clockwise or counterclockwise direction.

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