Self-cleaning filtering device

Abstract

The invention belongs to the technical field of tobacco production equipment, and discloses a self-cleaning filtering device. The self-cleaning filtering device comprises a flange plate, a filtering assembly, a driving assembly and a cleaning assembly. The flange plate is fixed to the end, provided with the air inlet, of the hot air pipeline. The filtering assembly comprises a screen cylinder and a support assembly, the support assembly is fixed to the flange plate, the screen cylinder is rotationally connected with the support assembly, the output end of the driving assembly is in transmission connection with the screen cylinder, the cleaning assembly comprises a first scraper, and the first scraper is arranged on the support assembly in the axial direction of the screen cylinder; the first scraper is used for cleaning the peripheral wall of the screen cylinder when the driving assembly drives the screen cylinder to rotate and removing tobacco scraps attached to the peripheral wall of the screen cylinder, blockage and air inlet efficiency reduction are avoided, the labor intensity of operators is relieved, and the equipment maintenance convenience and operation reliability are improved. And the production continuity and the product quality stability are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco production equipment, and particularly to a self-cleaning filtering device. Background Art

[0002] The HBD feeder is one of the equipment in the tobacco production process. The primary feeding hot air duct system, as a core component of the HBD feeder, plays a crucial role in the tobacco leaf processing. Among them, under the normal operation condition of the circulation fan in the primary feeding hot air duct system, process steam and supplementary steam circulate through the hot air duct to form a stable hot air flow, enabling the inside of the drum to reach the temperature required by the process, providing a suitable temperature environment for moisture to fully penetrate into the tobacco leaf tissue, and thus ensuring the quality of tobacco leaf processing.

[0003] However, during the operation of the HBD feeder, the circulating medium will inevitably carry a small amount of tobacco leaf debris into the hot air duct. Part of the tobacco leaf debris adheres to the pipe wall, butterfly valve, and fan impeller, gradually accumulating to form soot over time. When adjusting the opening of the butterfly valve, the resistance of the soot makes it difficult for the valve to rotate, easily causing excessive force on the valve adjustment mechanism and resulting in deformation or damage of the connecting rod. Secondly, during operation, the accumulated scale may fall off at any time and hit the high-speed rotating fan impeller, causing damage to the impeller, and further leading to dynamic imbalance of the impeller. The dynamically unbalanced impeller will not only accelerate the wear of core components such as the circulation fan but also increase the operating burden of the frequency converter, reducing the overall stability and service life of the equipment. In addition, since the circulation air duct is usually located at a relatively high position with a narrow working space, it is difficult to clean and maintain manually, increasing the complexity and cost of equipment maintenance. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-cleaning filtering device to avoid blockage of the hot air duct and decline in air intake efficiency, reduce the labor intensity of operators, and improve the convenience of equipment maintenance and operation reliability.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The self-cleaning filtering device is arranged at the air inlet of the hot air duct of the HBD feeder and includes:

[0007] A flange plate, fixed to one end of the hot air duct where the air inlet is provided;

[0008] A filtering component, including a screen cylinder and a support component. The support component is fixed to the flange plate, and the screen cylinder is rotatably connected to the support component;

[0009] A driving component, the output end of which is in transmission connection with the screen cylinder;

[0010] Cleaning assembly, including a first scraper, the first scraper is arranged on the bracket assembly along the axial direction of the screen cylinder, and the first scraper is used to clean the outer peripheral wall of the screen cylinder when the driving assembly drives the screen cylinder to rotate.

[0011] Optionally, the bracket assembly includes:

[0012] The first mounting bracket, including an annular member and a support member, the annular member is fastened to the flange, and the support member is fixed to the inner side of the annular member;

[0013] The second mounting bracket, including a first rod member and a second rod member, the first rod member is arranged opposite to the annular member, and both ends of the first rod member are respectively connected to the annular member through one of the second rod members;

[0014] Both ends of the screen cylinder are respectively rotatably connected to the first rod member and the support member, and the first scraper is provided on each of the second rod members.

[0015] Optionally, the filtering assembly further includes a rotating shaft, the rotating shaft penetrates through the screen cylinder and is coaxially fixed to the screen cylinder, and both ends of the rotating shaft are respectively rotatably connected to the first rod member and the support member.

[0016] Optionally, a first rotating seat is provided on the first rod member, a first bearing is provided in the first rotating seat, a second rotating seat is provided on the support member, a second bearing is provided in the second rotating seat, and both ends of the rotating shaft are respectively rotatably connected to the first rotating seat and the second rotating seat through the first bearing and the second bearing.

[0017] Optionally, the bracket assembly further includes a gasket, and the gasket is clamped between the flange and the annular member.

[0018] Optionally, the first scraper includes:

[0019] A mounting plate, fixed to the second rod member;

[0020] A connecting plate and a first cutting head, one end of the connecting plate is connected to the mounting plate, and the other end is connected to the first cutting head, and the first cutting head can be in sliding contact with the outer wall of the screen cylinder.

[0021] Optionally, the screen cylinder includes:

[0022] A cylinder body, having a hollow cylindrical structure with openings at both ends, and a plurality of first ventilation holes are provided on the peripheral wall of the cylinder body;

[0023] A first plate body, arranged at the first end of the cylinder body and fixed to the rotating shaft, and a plurality of the first ventilation holes are provided on the first plate body;

[0024] The second plate body is arranged at the second end of the cylinder body and fixed to the rotating shaft. A plurality of second air vents are provided on the second plate body. Among them, the diameter of the second air vents is larger than that of the first air vents.

[0025] Optionally, the driving assembly includes:

[0026] A fixed seat arranged on the bracket assembly;

[0027] A driving member, the driving member is arranged on the fixed seat, and the output end of the driving member is in transmission connection with the rotating shaft.

[0028] Optionally, the driving assembly further includes a protective cover. The driving member is located in the hot air duct. The protective cover covers the driving member and is hermetically connected to the fixed seat.

[0029] Optionally, the cleaning assembly further includes a second scraper. The second scraper is arranged on the bracket assembly along the radial direction of the screen cylinder. The second scraper can clean the end face of the screen cylinder away from the flange when the driving assembly drives the screen cylinder to rotate.

[0030] Advantageous effects:

[0031] The self-cleaning filtering device provided by the present invention is arranged at one end of the hot air duct of the HBD feeder, can filter tobacco leaf debris, prevent the tobacco leaf debris from entering the hot air duct of the HBD feeder, avoid the deposition of soot on parts such as the pipe wall, butterfly valve and fan impeller, and effectively extend the service life of the internal components of the hot air duct. Moreover, when the driving assembly drives the screen cylinder to rotate, the first scraper slides in contact with the outer peripheral wall, can clean the outer peripheral wall of the screen cylinder, remove the tobacco leaf debris attached to the outer peripheral wall of the screen cylinder, avoid the blockage of the hot air duct and the decrease of the air intake efficiency, reduce the labor intensity of the operators, improve the convenience of equipment maintenance and the operation reliability, and ensure the continuity of production and the stability of product quality. Description of the drawings

[0032] Figure 1 is a schematic structural diagram of the self-cleaning filtering device provided by the present invention;

[0033] Figure 2 is an exploded view of the self-cleaning filtering device provided by the present invention;

[0034] Figure 3 is a schematic structural diagram of the bracket assembly provided by the present invention;

[0035] Figure 4 is a schematic structural diagram of the first scraper in the first perspective provided by the present invention;

[0036] Figure 5It is a schematic structural diagram of the first scraper provided by the present invention from a second perspective;

[0037] Figure 6 It is a schematic structural diagram of the screen cylinder provided by the present invention;

[0038] Figure 7 It is an exploded view of the drive assembly provided by the present invention.

[0039] In the figure:

[0040] 100, flange;

[0041] 210, screen cylinder; 211, cylinder body; 2111, first ventilation hole; 212, first plate body; 213, second plate body; 2131, second ventilation hole; 220, support assembly; 221, first mounting bracket; 2211, annular member; 2212, support member; 222, second mounting bracket; 2221, first rod; 22211, first rotating seat; 2222, second rod; 223, rotating shaft; 224, gasket;

[0042] 300, drive assembly; 310, fixed seat; 320, drive member; 330, protective cover;

[0043] 410, first scraper; 411, mounting plate; 412, connecting plate; 413, first cutter head; 420, second scraper;

[0044] 510, first fastener; 520, second fastener; 530, fourth fastener; 540, fifth fastener. Detailed implementation manners

[0045] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0048] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] This embodiment provides a self-cleaning filtering device, which is arranged at the air inlet of the hot air duct of the HBD feeder. Its characteristics are as Figure 1 shown. The self-cleaning filtering device includes a flange 100, a filtering component, a driving component 300 and a cleaning component. The flange 100 is fixed at one end of the hot air duct where the air inlet is provided. The filtering component includes a screen cylinder 210 and a support component 220. The support component 220 is fixed on the flange 100. The screen cylinder 210 is rotatably connected to the support component 220. The output end of the driving component 300 is in transmission connection with the screen cylinder 210. The driving component 300 is used to drive the screen cylinder 210 to rotate around its own axis. The cleaning component includes a first scraper 410. The first scraper 410 is arranged on the support component 220 along the axial direction of the screen cylinder 210. The first scraper 410 is used to clean the outer peripheral wall of the screen cylinder 210 when the driving component 300 drives the screen cylinder 210 to rotate, remove the tobacco leaf debris attached to the outer peripheral wall of the screen cylinder 210, avoid blockage and the decline of the air inlet efficiency, reduce the labor intensity of the operators, improve the convenience of equipment maintenance and the operation reliability, and ensure the continuity of production and the stability of product quality. Moreover, the self-cleaning filtering device is arranged at one end of the hot air duct of the HBD feeder, can filter the tobacco leaf debris, prevent the tobacco leaf debris from entering the hot air duct of the HBD feeder, avoid the deposition of soot on parts such as the pipe wall, butterfly valve and fan impeller, and effectively extend the service life of the internal components of the hot air duct.

[0050] Optionally, as Figures 2 - 3As shown, the bracket assembly 220 includes a first mounting bracket 221 and a second mounting bracket 222. The first mounting bracket 221 includes an annular member 2211 and a support member 2212. The annular member 2211 is fastened to the flange 100, and the support member 2212 is fixed to the inner side of the annular member 2211. The second mounting bracket 222 includes a first rod member 2221 and a second rod member 2222. The first rod member 2221 is disposed opposite to the annular member 2211, and both ends of the first rod member 2221 are connected to the annular member 2211 through a second rod member 2222 respectively. Both ends of the screen cylinder 210 are rotatably connected to the first rod member 2221 and the support member 2212 respectively. A first scraper 410 is provided on each second rod member 2222. During the rotation of the screen cylinder 210, the first scraper 410 mounted on the second rod member 2222 can stably and continuously form a sliding contact with the outer peripheral wall of the screen cylinder 210, thereby effectively cleaning it, ensuring the permeability of the screen, preventing blockage caused by the accumulation of tobacco leaf debris, and further improving the self-cleaning ability and operation reliability of the filtering device.

[0051] Optionally, the first rod member 2221 and the second rod member 2222 are configured as an integrally formed structure, which can improve the connection strength between the first rod member 2221 and the second rod member 2222, simplify the processing technology, and improve the processing efficiency. In other embodiments, the first rod member 2221 and the second rod member 2222 can be welded together.

[0052] Optionally, the filtering assembly further includes a rotating shaft 223. The rotating shaft 223 penetrates the screen cylinder 210 and is coaxially fixed to the screen cylinder 210. Both ends of the rotating shaft 223 are rotatably connected to the first rod member 2221 and the support member 2212 respectively, thereby providing a stable rotational support for the screen cylinder 210. This design ensures that the screen cylinder 210 can rotate smoothly around its own axis under the action of the driving assembly 300, reduces vibration and eccentricity problems, and improves operation reliability.

[0053] Optionally, a first rotating seat 22211 is provided on the first rod member 2221. A first bearing is provided in the first rotating seat 22211. A second rotating seat is provided on the support member 2212, and a second bearing is provided in the second rotating seat. Both ends of the rotating shaft 223 are rotatably connected to the first rotating seat 22211 and the second rotating seat through the first bearing and the second bearing respectively, greatly reducing the frictional resistance during the rotation of the rotating shaft 223, enabling the screen cylinder 210 to rotate smoothly and efficiently with lower energy consumption under the action of the driving assembly 300, and improving the operation efficiency.

[0054] Optionally, as Figure 2As shown, the bracket assembly 220 further includes a gasket 224, and the gasket 224 is clamped between the flange 100 and the annular member 2211. The gasket 224 fills the gap between the flange 100 and the annular member 2211, effectively preventing tobacco debris, dust, moisture or other external pollutants from entering the hot air duct through the connection, ensuring the cleanliness inside the hot air duct, and reducing the possibility of soot deposition.

[0055] Optionally, the gasket 224 can be a metal gasket 224 or a rubber gasket 224. The rubber gasket 224 can absorb the vibration generated during the operation of the equipment, especially the mechanical vibration generated when the screen cylinder 210 rotates and the drive assembly 300 works, reducing the operating noise and improving the working environment.

[0056] Optionally, the flange 100 is welded to the end of the hot air duct. The flange 100, the gasket 224 and the first mounting bracket 221 are fixedly connected by a first fastener 510, which facilitates the installation of the self-cleaning filter device at one end of the hot air duct provided with an air inlet, improving the installation efficiency. Specifically, the first fastener 510 is a first screw. Four first screws are welded on the flange 100 and are evenly distributed along the circumference of the flange 100. Four first through holes are provided on the annular member 2211 of the first mounting bracket 221. Each first screw passes through a corresponding first through hole and is threadedly connected to a first nut, so as to fixedly connect the first mounting bracket 221 and the flange 100.

[0057] Optionally, as Figures 4 - 5 shown, the first scraper 410 includes a mounting plate 411, a connecting plate 412 and a first cutter head 413. The mounting plate 411 is fixed to the second rod 2222. One end of the connecting plate 412 is connected to the mounting plate 411, and the other end is connected to the first cutter head 413. The first cutter head 413 can slidably contact the outer wall of the screen cylinder 210, achieving an efficient and continuous cleaning effect, significantly improving the filtration efficiency, operating reliability and maintenance convenience of the self-cleaning filter device.

[0058] Optionally, the mounting plate 411 is fixedly connected to the second rod 2222 by a second fastener 520, which can ensure the stability of the connection between the first scraper 410 and the second rod 2222 and facilitate the disassembly and assembly of the second fastener 520.

[0059] Optionally, the mounting plate 411 is provided with a waist-shaped hole, and the second rod 2222 is provided with a threaded hole. The waist-shaped hole can be opposite to the threaded hole. The second fastener 520 is a second screw. The second screw passes through the waist-shaped hole and the threaded hole in sequence and is threadedly connected to the second rod 2222. Through the setting of the waist-shaped hole, the distance between the first cutter head 413 and the screen cylinder 210 can be adjusted, avoiding too large or too small a distance and ensuring the cleaning effect of the first cutter head 413.

[0060] Optionally, as Figure 5 shown, the mounting plate 411 and the connecting plate 412 form a preset angle α, which can ensure the cleaning effect of the first cutter head 413. Among them, the preset angle α is greater than 0° and less than or equal to 180°, and specifically can be 30°, 60°, 90°, 120°, 150°, etc.

[0061] In this embodiment, as Figure 5 shown, the preset angle α between the mounting plate 411 and the connecting plate 412 is 105°. The first cutter head 413 of the first scraper 410 is further inclined by 15° on the basis of this angle, that is, the angle β between the first scraper 410 and the extension line of the connecting plate 412 is 15°. The first scraper 410 and the screen cylinder 210 maintain a gap of 0 mm - 2 mm, so that the first cutter head 413 can smoothly scrape off the tobacco leaves and maintain sufficient strength. Optionally, the distance between the first scraper 410 and the screen cylinder 210 can be 0 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, etc. The value of the angle β between the first scraper 410 and the extension line of the connecting plate 412 can be set according to actual cleaning requirements. For example, the angle β can be 15° - 60°, and specifically can be 15°, 30°, 45°, 60°, etc.

[0062] Optionally, as Figure 6 shown, the screen cylinder 210 includes a cylinder body 211, a first plate body 212 and a second plate body 213. The cylinder body 211 is a hollow cylindrical structure with openings at both ends. A plurality of first ventilation holes 2111 are provided on the peripheral wall of the cylinder body 211; the first plate body 212 is arranged at the first end of the cylinder body 211 and is fixed to the rotating shaft 223. A plurality of first ventilation holes 2111 are provided on the first plate body 212; the second plate body 213 is arranged at the second end of the cylinder body 211 and is fixed to the rotating shaft 223. A plurality of second ventilation holes 2131 are provided on the second plate body 213. Among them, the diameter of the second ventilation holes 2131 is larger than the diameter of the first ventilation holes 2111. The first ventilation holes 2111 on the outer peripheral wall of the screen cylinder 210 and the first plate body 212 form a filter layer, which effectively blocks smaller tobacco leaf debris. The second plate body 213 is provided with larger pore diameters, which is beneficial to reducing the end air resistance and enhancing the air permeability, thereby optimizing the air flow path and improving the filtration efficiency and the overall operation performance of the equipment.

[0063] Optionally, the screen cylinder 210 can be made of 304 stainless steel, which can ensure the structural strength of the screen cylinder 210. At the same time, the material is corrosion-resistant and can increase the service life of the screen cylinder 210. Specifically, the screen cylinder 210 is cylindrical as a whole, the wall thickness of the cylinder 211 is 2mm, and the circumferential surface of the cylinder 211 is provided with 10mm first air holes 2111, the spacing between the two first air holes 2111 along the axial direction of the cylinder 211 is 14mm, and the spacing between the two first air holes 2111 along the circumferential direction of the cylinder 211 is 12mm, distributed on the entire surface of the cylinder 211.

[0064] Optionally, the first plate 212 is welded to the cylinder 211, and the second plate 213 is detachably connected to the cylinder 211. The first plate 212 is connected by welding, which is beneficial to improve the connection strength between the screen cylinder 210 and the first plate 212; the second plate 213 is detachably connected, which is convenient for disassembly and maintenance, and is convenient for cleaning residual impurities inside or replacing damaged parts, thereby improving the maintainability and ease of use of the device.

[0065] Optionally, the second plate 213 can be fastened to the cylinder 211 by a third fastener, which can be a third screw, to ensure the stability and reliability of the connection between the second plate 213 and the cylinder 211. In other embodiments, the second plate 213 can be fastened to the cylinder 211 by snapping.

[0066] Alternatively, if Figure 7 As shown, the driving assembly 300 includes a fixing seat 310 and a driving member 320. The fixing seat 310 is arranged on the support member 2212 of the first mounting frame 221, and the driving member 320 is arranged on the fixing seat 310, and the output end of the driving member 320 is transmission-connected with the rotating shaft 223, and the rotating shaft 223 can be driven to rotate by the driving assembly 300, thereby driving the screen cylinder 210 to rotate. In this embodiment, the driving member 320 is arranged on the side of the first mounting frame 221 away from the screen cylinder 210, so that the driving member 320 is located in the hot air duct, which can reasonably utilize the space and improve the compactness of the self-cleaning filter device.

[0067] Optionally, the driving assembly 300 further includes a protective cover 330. The driving member 320 is located in the hot air duct. The protective cover 330 is disposed on the driving member 320 and is sealed and connected to the fixing seat 310. The protective cover 330 can effectively isolate the high-temperature airflow inside the hot air duct to prevent it from corroding or damaging the driving member 320, thereby extending the service life of the driving member 320.

[0068] Optionally, the protective cover 330 is integrally in the shape of a "cup cover". There is a bent plate at the cup opening, and through holes are opened on the bent plate. By passing a fourth fastener 530 through the through holes, the protective cover 330 can be fixed on the support member 2212 of the first mounting bracket 221. In this embodiment, the driving member 320 is a pneumatic reduction motor. Two avoidance holes are reserved on the protective cover 330, which are respectively used for passing through an air inlet pipe and an air outlet pipe. Both the air inlet pipe and the air outlet pipe are communicated with the air inlet interface and the air outlet interface of the pneumatic reduction motor to provide power for the pneumatic reduction motor. In this embodiment, the fourth fastener 530 can be a fourth screw, which can ensure the connection stability between the protective cover 330 and the first mounting bracket 221 and improve the protection effect on the pneumatic reduction motor.

[0069] Optionally, the start of the pneumatic reduction motor can be controlled by a PLC controller. According to production requirements, during the production process of the same batch of tobacco leaves, the pneumatic reduction motor runs for 5S and stops for 90S every time. The selected motor type is a pneumatic vane type, and the model can be NK-4VA1:15. The characteristics of this type of pneumatic reduction motor are variable speed, explosion-proof, no spark, no static electricity generation, no heat generation during operation, will not burn out, and can rotate in both forward and reverse directions. It should be noted that the connection circuit and control program between the PLC controller and the pneumatic reduction motor are conventional technical means in the art and will not be elaborated here.

[0070] Optionally, the cleaning assembly further includes a second scraper 420. The second scraper 420 is radially arranged on the bracket assembly 220 along the screen cylinder 210. The second scraper 420 can scrape and clean the end face of the screen cylinder 210 away from the flange 100 during the rotation of the screen cylinder 210, effectively removing tobacco leaf debris or dust attached to the end face, further improving the overall self-cleaning ability of the filtering device, preventing the influence of the accumulation of impurities on the end face on the rotation stability or filtering effect, and thus improving the reliability and cleaning and maintenance efficiency of the device operation.

[0071] Optionally, the second scraper 420 includes a tool body and a second tool head. The tool body is fastened to the first rod 2221 of the second mounting bracket 222 by a fifth fastener 540. The distance between the second tool head and the corresponding end face of the screen cylinder 210 is 0 mm - 2 mm, specifically, it can be 0 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, etc. A small gap is maintained between the second tool head and the end face of the screen cylinder 210, which can achieve efficient scraping of the residues on the end face without interfering with the rotation.

[0072] In this embodiment, the fifth fastener 540 is a fifth screw, which can ensure that the connection between the second scraper 420 and the first rod 2221 is more stable and reliable.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Self-cleaning filtration device, which is arranged at the air inlet of the hot air pipeline of the HBD feeder, is characterized in that, Comprising: A flange (100), fixed to one end of the hot air duct where the air inlet is provided; A filtering assembly, including a screen cylinder (210) and a support assembly (220), the support assembly (220) is fixed on the flange (100), and the screen cylinder (210) is rotatably connected to the support assembly (220); A driving assembly (300), the output end of the driving assembly (300) is in transmission connection with the screen cylinder (210); A cleaning assembly, including a first scraper (410), the first scraper (410) is arranged on the support assembly (220) along the axial direction of the screen cylinder (210), and the first scraper (410) is used to clean the outer peripheral wall of the screen cylinder (210) when the driving assembly (300) drives the screen cylinder (210) to rotate.

2. The self-cleaning filtration device according to claim 1, wherein The support assembly (220) includes: A first mounting bracket (221), including an annular member (2211) and a support member (2212), the annular member (2211) is fastened to the flange (100), and the support member (2212) is fixed to the inner side of the annular member (2211); A second mounting bracket (222), including a first rod member (2221) and a second rod member (2222), the first rod member (2221) is arranged opposite to the annular member (2211), and both ends of the first rod member (2221) are respectively connected to the annular member (2211) through one of the second rod members (2222); Both ends of the screen cylinder (210) are respectively rotatably connected to the first rod member (2221) and the support member (2212), and the first scraper (410) is arranged on each of the second rod members (2222).

3. The self-cleaning filtration device according to claim 2, characterized in that, The filtering assembly further includes a rotating shaft (223), the rotating shaft (223) penetrates through the screen cylinder (210) and is coaxially fixed to the screen cylinder (210), and both ends of the rotating shaft (223) are respectively rotatably connected to the first rod member (2221) and the support member (2212).

4. The self-cleaning filtration device according to claim 3, wherein A first rotating seat (22211) is arranged on the first rod member (2221), a first bearing is arranged inside the first rotating seat (22211), a second rotating seat is arranged on the support member (2212), a second bearing is arranged inside the second rotating seat, and both ends of the rotating shaft (223) are respectively rotatably connected to the first rotating seat (22211) and the second rotating seat through the first bearing and the second bearing.

5. The self-cleaning filtration device according to claim 2, wherein The support assembly (220) further includes a gasket (224), and the gasket (224) is clamped between the flange (100) and the annular member (2211).

6. The self-cleaning filtration device according to claim 2, wherein The first scraper (410) includes: A mounting plate (411), fixed to the second rod member (2222); A connecting plate (412) and a first cutter head (413), one end of the connecting plate (412) is connected to the mounting plate (411), the other end is connected to the first cutter head (413), and the first cutter head (413) can be in sliding contact with the outer wall of the screen cylinder (210).

7. The self-cleaning filtration device according to claim 3, wherein, The screen cylinder (210) includes: The cylinder body (211) is a hollow cylindrical structure with openings at both ends. A number of first ventilation holes (2111) are provided on the peripheral wall of the cylinder body (211). The first plate body (212) is arranged at the first end of the cylinder body (211) and fixed to the rotating shaft (223). A number of the first ventilation holes (2111) are provided on the first plate body (212). The second plate body (213) is arranged at the second end of the cylinder body (211) and fixed to the rotating shaft (223). A number of second ventilation holes (2131) are provided on the second plate body (213). Among them, the diameter of the second ventilation holes (2131) is larger than that of the first ventilation holes (2111).

8. The self-cleaning filtration device according to claim 3, wherein, The driving assembly (300) includes: A fixed seat (310) arranged on the support assembly (220). A driving member (320) arranged on the fixed seat (310), and the output end of the driving member (320) is in transmission connection with the rotating shaft (223).

9. The self-cleaning filtration device according to claim 8, characterized in that, The driving assembly (300) further includes a protective cover (330). The driving member (320) is located in the hot air duct. The protective cover (330) covers the driving member (320) and is hermetically connected to the fixed seat (310).

10. The self-cleaning filtration device according to any one of claims 1-9, characterized in that, The cleaning assembly further includes a second scraper (420). The second scraper (420) is arranged on the support assembly (220) along the radial direction of the screen cylinder (210). The second scraper (420) can clean the end face of the screen cylinder (210) away from the flange (100) when the driving assembly (300) drives the screen cylinder (210) to rotate.

Images