Multi-stage dust removal equipment

Abstract

The utility model discloses multi-stage dust removal equipment which comprises a box body, an air outlet is formed in one end of the box body, an air inlet is formed in the other end of the box body, through grooves are formed in the two sides of the box body, a plurality of sets of supporting plates are symmetrically and fixedly connected to the two sides of the box body, and tetragonal prisms are installed between the multiple sets of supporting plates. A discharging roller and a receiving roller are fixedly installed on the multiple sets of tetragonal columns respectively, multiple stages of filter screens with different hole diameters are wound around the discharging roller, and the other ends of the filter screens penetrate through the through grooves and are wound around the receiving roller. According to the utility model, by arranging the multi-stage filter screen of which the pore diameter is gradually reduced from the air inlet to the air outlet, comprehensive and efficient dust removal is realized to meet the requirements of environmental protection and production process, and by virtue of the design of matching of the discharging roller and the receiving roller and magnetic connection of the transparent protective cover and the box body, the filter screen is quickly replaced under the non-stop condition, and internal parts are protected; the production continuity is improved; the service life of equipment is prolonged; and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, and in particular to a multi-stage dust removal device. Background Technology

[0002] In industrial production and many other fields, effective filtration of dust in gases is crucial. Traditional dust removal equipment often has many drawbacks. For example, common single-stage filtration equipment can only intercept dust using a filter with a single pore size, failing to achieve comprehensive and efficient filtration of dust particles of different sizes. As a result, the filtered gas may still contain a large amount of fine dust, making it difficult to meet increasingly stringent environmental and production requirements. While some multi-stage filtration equipment improves filtration efficiency to some extent, filter replacement is extremely cumbersome, requiring shutdown and disassembly of numerous components, severely impacting production efficiency and incurring high maintenance costs. At the same time, critical internal components lack effective protection, making them susceptible to dust corrosion and external interference, leading to high equipment failure rates and shortened service life.

[0003] Therefore, we propose a multi-stage dust removal device. Utility Model Content

[0004] The main objective of this invention is to provide a multi-stage dust removal device. This addresses the problems of traditional single-stage filtration equipment, such as poor filtration performance and inability to meet environmental and production requirements; the cumbersome filter replacement process of multi-stage filtration equipment, which affects production efficiency and results in high maintenance costs; and the lack of protection for key internal components, leading to high failure rates and shortened service life. The invention aims to improve the quality and efficiency of gas filtration, enhance production continuity and stability, reduce equipment maintenance costs, extend equipment life, and better meet the needs of industrial production and numerous other fields for effective dust filtration in gases. This invention effectively solves the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-stage dust removal device includes a housing, with an air outlet at one end and an air inlet at the other end. Both sides of the housing have through slots. Multiple sets of support plates are symmetrically fixedly connected to both sides of the housing. Square columns are installed between the support plates. Feeding rollers and receiving rollers are fixedly installed on the square columns. Multiple levels of filter screens with different apertures are wound on the feeding rollers. The other end of each filter screen passes through the through slot and is wound onto the receiving roller. The aperture of the multiple filter screens gradually decreases from the air inlet to the air outlet.

[0007] Multiple transparent protective covers are provided on both sides of the box. The feeding roller and the receiving roller are located inside the transparent protective cover. The transparent protective cover is one-to-one with the feeding roller and the receiving roller in terms of position and quantity. A first magnet is provided on the side of the transparent protective cover closest to the box. Second magnets that attract the first magnet are provided on both sides of the box.

[0008] By adopting the above technical solution, dust-laden gas enters the chamber through the inlet. First, the gas comes into contact with a filter screen with a larger pore size. Since the filter screen has multiple stages and the pore size gradually decreases from the inlet to the outlet, dust particles are filtered step by step through filter screens with different pore sizes. When the gas passes through the first filter screen with a larger pore size, larger dust particles are intercepted. As the gas continues to flow, the filter screen with a smaller pore size can intercept even finer dust particles. In this way, through multi-stage filtration, dust in the gas can be effectively removed, allowing relatively clean gas to be discharged from the outlet.

[0009] The feed roller is wound with multiple levels of filter screens with different apertures. The other end of the filter screen passes through the through groove and is wound on the take-up roller. During operation, when a certain level of filter screen is blocked or needs to be replaced, the used filter screen part can be wound up by rotating the take-up roller, while the feed roller releases a new filter screen.

[0010] The transparent protective cover protects the feeding roller and the receiving roller. A first magnet is installed on the side of the transparent protective cover near the housing, and second magnets that attract the first magnet are installed on both sides of the housing. This magnetic connection method makes the transparent protective cover easy to install and remove, and facilitates the maintenance and operation of the feeding roller and the receiving roller.

[0011] Furthermore, a motor is fixedly installed on the support plate near the take-up roller. The output end of the motor is coaxially connected to one end of the square post near the take-up roller. A first stud is fixedly connected to the other end of the square post near the take-up roller. The end of the first stud away from the square post passes through the support plate and is threaded with a first threaded sleeve.

[0012] By adopting the above technical solution, when the motor is powered on, the rotational power of the motor will be transmitted to the four-sided column. Since the four-sided column is connected to the receiving roller, the rotation of the four-sided column will drive the receiving roller to rotate synchronously. In this way, when the filter screen needs to be replaced or moved, the receiving roller can rotate to roll up the filter screen, gradually rolling up the used part onto the receiving roller, while the unloading roller releases the new filter screen part for continued dust removal.

[0013] The other end of the square column near the receiving roller is fixedly connected to a first stud. The end of the first stud away from the square column passes through the support plate and is threaded with a first threaded sleeve. When installing the receiving roller, first pass the first stud on the square column through the corresponding hole on the support plate, and then tighten the first threaded sleeve. Through the threaded connection between the first threaded sleeve and the first stud, the square column is firmly installed on the support plate, thereby fixing the receiving roller. When it is necessary to disassemble the receiving roller for maintenance, replacement, or other operations, simply unscrew the first threaded sleeve to remove the square column and the receiving roller from the support plate, making it convenient for equipment inspection and maintenance.

[0014] Furthermore, each end of the square column near the feeding roller is fixedly connected with a second stud, the second stud passing through the support plate and threaded with a second threaded sleeve.

[0015] By adopting the above technical solution, when installing the feeding roller, the second stud on the square column is passed through the corresponding hole on the support plate, and then the second threaded sleeve is installed by thread. When the second threaded sleeve is tightened, the second threaded sleeve will be pressed towards the support plate. The axial force generated by the threaded engagement between the second threaded sleeve and the second stud is used to fix the square column between the support plates, so that the feeding roller can be stably installed in the equipment. This installation method ensures that the feeding roller is stable in position during operation, so that the filter screen can be smoothly unfolded from the feeding roller and enter the working state.

[0016] When the feeding roller needs to be disassembled, for example, to replace a new filter screen roll or to repair the feeding roller itself, simply loosen the second threaded sleeve. As the second threaded sleeve is loosened, the axial compressive force of the second threaded sleeve on the support plate disappears, and the square column can be pulled out from between the support plates, thus making it easy to remove the feeding roller. This structural design makes the installation and disassembly of the feeding roller simple and is beneficial to the maintenance and upkeep of the equipment.

[0017] Furthermore, an air pump is provided at one end of the housing, and an air extraction pipe is connected between the air pump and the air outlet.

[0018] By adopting the above technical solution, the air pump is the power source for the gas flow of the entire equipment. When the air pump starts, it generates negative pressure in the air extraction pipe. Since the air extraction pipe is connected to the air outlet of the chamber, this negative pressure will cause the clean gas filtered by the multi-stage filter screen inside the chamber to be continuously extracted. The external air pressure is higher than the air pressure inside the chamber after the action of the air pump. Driven by the pressure difference, the dust-laden gas will continuously enter the chamber from the air inlet, and after passing through the multi-stage filter, it will be extracted from the equipment by the air pump, thus ensuring that the dust-laden gas can continuously enter the equipment for dust removal and maintain the continuous operation of the equipment.

[0019] Furthermore, an air extraction hood is provided at the other end of the housing, and an air intake pipe is connected between the air extraction hood and the air inlet.

[0020] By adopting the above technical solution, the function of the fume extraction hood is to collect dust-laden gas. In actual application scenarios, the fume extraction hood can be placed near the area where dust-laden gas is generated. When the fume extraction pump works, a negative pressure is formed in the entire system, so that the dust-laden gas is sucked into the fume extraction hood under the action of the pressure difference.

[0021] The air inlet pipe connects the exhaust hood to the air inlet of the housing, providing a channel for the dust-laden gas to be transferred from the exhaust hood to the housing. After being collected by the exhaust hood, the dust-laden gas is transported into the housing through the air inlet pipe and then enters the filtration area of ​​the multi-stage filter screen for subsequent dust removal. Through the cooperation of the exhaust hood and the air inlet pipe, the dust-laden gas can be more effectively introduced into the multi-stage dust removal equipment, improving the dust removal efficiency.

[0022] Furthermore, an activated carbon plate is installed inside the box near the air inlet, and a wire mesh is fixedly installed at the air inlet end of the exhaust hood.

[0023] By adopting the above technical solution, the activated carbon plate mainly plays the role of adsorption and purification. After the dust-laden gas enters the chamber through the air inlet, it first comes into contact with the activated carbon plate. Activated carbon has a rich pore structure and a huge specific surface area, which can adsorb organic pollutants, odor substances and some harmful gases in the gas. When passing through the activated carbon plate, these harmful substances will adhere to the pore surface of the activated carbon, thereby achieving preliminary purification of the gas, reducing the types and contents of pollutants that the subsequent filter screen needs to treat, and improving the overall purification effect of the entire dust removal equipment to a certain extent.

[0024] The wire mesh fixedly installed at the air inlet of the exhaust hood mainly serves as a preliminary filter and protector. When dust-laden gas is sucked into the exhaust hood, the wire mesh can block larger particulate impurities, such as large dust clumps and debris, preventing these larger impurities from entering the air inlet pipe and the housing, thus avoiding blockage or damage to subsequent components such as activated carbon plates and filters. At the same time, it can also ensure that the gas entering the equipment is relatively uniform, which is conducive to the smooth progress of subsequent dust removal and purification processes.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) This utility model provides a multi-stage dust removal device, which is equipped with multiple filter screens with different pore sizes, and the pore size gradually decreases from the air inlet to the air outlet. After the dust-laden gas enters the box, it first passes through the filter screen with a larger pore size to intercept large dust particles. As the gas flows, the subsequent filter screens with smaller pore sizes filter out finer dust particles in turn. Compared with traditional single-stage filtration equipment, this step-by-step filtration method can comprehensively and meticulously remove various types of dust in the gas, greatly improve the dust removal efficiency, and make the discharged gas cleaner, effectively meeting the strict requirements of environmental protection and production processes for gas purity.

[0027] (2) This utility model provides a multi-stage dust removal device with a feeding roller and a receiving roller designed to work together. When a certain stage of the filter screen becomes clogged or needs to be replaced, the receiving roller is rotated to rewind the used part, and the feeding roller releases the new filter screen simultaneously. There is no need to stop the machine to perform complicated filter screen disassembly and installation operations, which greatly saves maintenance time and improves production continuity. At the same time, the transparent protective cover is magnetically connected to the second magnet on the box through the first magnet, which effectively protects the feeding roller and the receiving roller from dust corrosion and external damage, extending the service life of the equipment. It also makes the protective cover easy to install and disassemble, which is convenient for staff to perform daily maintenance and operation of the internal components, reducing the overall maintenance cost. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of a multi-stage dust removal device according to the present invention.

[0029] Figure 2 This is a schematic diagram of the internal structure of a multi-stage dust removal device according to the present invention.

[0030] Figure 3 This is a side sectional view of the housing of a multi-stage dust removal device according to this utility model.

[0031] In the diagram: 1. Box body; 2. Air outlet; 3. Air inlet; 4. Support plate; 5. Square column; 6. Feeding roller; 7. Receiving roller; 8. Filter screen; 9. Transparent protective cover; 10. Wire mesh; 11. First magnet; 12. Second magnet; 13. Motor; 14. First stud; 15. First threaded sleeve; 16. Second stud; 17. Second threaded sleeve; 18. Through groove; 19. Air pump; 20. Air extraction pipe; 21. Air extraction hood; 22. Air inlet pipe; 23. Activated carbon plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] To prevent problems such as poor filtration performance and inability to meet environmental and production requirements with traditional single-stage filtration equipment, cumbersome filter replacement affecting production efficiency and high maintenance costs in multi-stage filtration equipment, and high failure rates and shortened lifespans due to lack of protection for critical internal components, this method aims to improve the quality and efficiency of gas filtration, enhance production continuity and stability, reduce equipment maintenance costs, extend equipment lifespan, and better meet the needs of industrial production and numerous other fields for effective dust filtration in gases. Figure 1 , Figure 2 , Figure 3As shown, a multi-stage dust removal device includes a housing 1. One end of the housing 1 has an air outlet 2, and the other end of the housing 1 has an air inlet 3. Both sides of the housing 1 have through grooves 18. Multiple sets of support plates 4 are symmetrically fixedly connected to both sides of the housing 1. Square columns 5 are installed between the multiple sets of support plates 4. Feeding rollers 6 and receiving rollers 7 are fixedly installed on the multiple sets of square columns 5 respectively. Multiple filter screens 8 with different apertures are wound on the feeding rollers 6. The other end of the filter screen 8 passes through the through grooves 18 and is wound on the receiving rollers 7. The aperture of the multiple filter screens 8 gradually decreases from the air inlet 3 to the air outlet 2.

[0034] Multiple transparent protective covers 9 are provided on both sides of the box body 1. The feeding roller 6 and the receiving roller 7 are both located inside the transparent protective cover 9. The transparent protective cover 9 is in the same position and quantity as the feeding roller 6 and the receiving roller 7. A first magnet 11 is provided on the side of the transparent protective cover 9 closest to the box body 1. Second magnets 12 that attract the first magnet 11 are provided on both sides of the box body 1.

[0035] In use, dust-laden gas enters the housing 1 through the inlet 3. First, the gas comes into contact with the filter screen 8 with a larger pore size. Since the filter screen 8 has multiple stages and the pore size gradually decreases from the inlet 3 to the outlet 2, dust particles are filtered step by step through the filter screens with different pore sizes. When the gas passes through the first filter screen with a larger pore size, larger dust particles are intercepted. As the gas continues to flow, the filter screen with a smaller pore size can intercept even finer dust particles. In this way, through multi-stage filtration, the dust in the gas can be effectively removed, and relatively clean gas is discharged from the outlet 2.

[0036] The feed roller 6 is wound with multiple levels of filter screens 8 with different apertures. The other end of the filter screen 8 passes through the through groove 18 and is wound on the take-up roller 7. During the operation, when a certain level of filter screen is blocked or needs to be replaced, the used filter screen part can be wound up by rotating the take-up roller 7, and at the same time the feed roller 6 releases a new filter screen.

[0037] The transparent protective cover 9 can protect the feeding roller 6 and the receiving roller 7. A first magnet 11 is provided on the side of the transparent protective cover 9 near the box body 1, and a second magnet 12 that attracts the first magnet 11 is provided on both sides of the box body 1. This magnetic connection method makes the transparent protective cover 9 easy to install and disassemble, and facilitates the maintenance and operation of the feeding roller 6 and the receiving roller 7.

[0038] For example, such as Figure 3As shown, the present invention also includes a motor 13 fixedly installed on the support plate 4 near the receiving roller 7. The output end of the motor 13 is coaxially connected to one end of the square column 5 near the receiving roller 7. The other end of the square column 5 near the receiving roller 7 is fixedly connected to a first stud 14. The end of the first stud 14 away from the square column 5 passes through the support plate 4 and is threaded with a first threaded sleeve 15.

[0039] When in use, when the motor 13 is powered on, the rotational power of the motor will be transmitted to the square column 5. Since the square column 5 is connected to the receiving roller 7, the rotation of the square column 5 will drive the receiving roller 7 to rotate synchronously. In this way, when the filter screen 8 needs to be replaced or moved, the receiving roller 7 can rotate to roll up the filter screen 8, gradually rolling up the used part onto the receiving roller 7, while the discharging roller 6 releases the new filter screen part for continued dust removal.

[0040] A first stud 14 is fixedly connected to the other end of the square column 5 near the receiving roller 7. The end of the first stud 14 away from the square column 5 passes through the support plate 4 and is threaded with a first threaded sleeve 15. When installing the receiving roller 7, firstly, the first stud 14 on the square column 5 is passed through the corresponding hole on the support plate 4, and then the first threaded sleeve 15 is tightened. Through the threaded connection between the first threaded sleeve 15 and the first stud 14, the square column 5 is securely installed on the support plate 4, thereby fixing the receiving roller 7. When it is necessary to disassemble the receiving roller 7 for maintenance, replacement, or other operations, simply unscrew the first threaded sleeve 15 to remove the square column 5 and the receiving roller 7 from the support plate 4, making it convenient for equipment inspection and maintenance.

[0041] For example, such as Figure 3 As shown, the present invention also includes a second stud 16 fixedly connected to both ends of the square column 5 near the feeding roller 6. The second stud 16 passes through the support plate 4 and is threaded with a second threaded sleeve 17.

[0042] When using the feeding roller 6, the second stud 16 on the square column 5 is passed through the corresponding hole on the support plate 4, and then the second threaded sleeve 17 is installed by thread. When the second threaded sleeve 17 is tightened, the second threaded sleeve 17 will press towards the support plate 4. The axial force generated by the threaded engagement between the second threaded sleeve 17 and the second stud 16 will fix the square column 5 between the support plates 4, so that the feeding roller 6 can be stably installed in the equipment. This installation method ensures that the feeding roller 6 is stable in position during operation, so that the filter screen 8 can be smoothly unfolded from the feeding roller 6 and enter the working state.

[0043] When it is necessary to disassemble the feeding roller 6, for example, to replace a new filter screen roll or to repair the feeding roller 6 itself, simply loosen the second screw sleeve 17. As the second screw sleeve 17 is loosened, the axial compressive force of the second screw sleeve 17 on the support plate 4 disappears, and the square column 5 can be pulled out from between the support plates 4, thereby easily removing the feeding roller 6. This structural design makes the installation and disassembly of the feeding roller 6 simple and is beneficial to the maintenance and upkeep of the equipment.

[0044] For example, such as Figure 1 , Figure 2 As shown, the present invention also includes an air pump 19 provided at one end of the housing 1, and an air pump 20 connected between the air pump 19 and the air outlet 2.

[0045] During operation, the air pump 19 is the power source for the gas flow of the entire equipment. When the air pump 19 starts, it generates negative pressure in the air extraction pipe 20. Since the air extraction pipe 20 is connected to the air outlet 2 of the housing 1, this negative pressure causes the clean gas filtered by the multi-stage filter screen 8 in the housing 1 to be continuously extracted. The external air pressure is higher than the air pressure in the housing 1 after being processed by the air pump 19. Driven by the pressure difference, the dust-laden gas will continuously enter the housing 1 from the air inlet 3, and after passing through the multi-stage filter, it will be extracted from the equipment by the air pump 19. This ensures that the dust-laden gas can continuously enter the equipment for dust removal and maintain the continuous operation of the equipment.

[0046] For example, such as Figure 1 , Figure 2 As shown, the present invention also includes an exhaust hood 21 at the other end of the housing 1, and an air inlet pipe 22 connecting the exhaust hood 21 and the air inlet 3.

[0047] When in use, the function of the fume extractor 21 is to collect dust-laden gas. In actual application scenarios, the fume extractor 21 can be placed near the area where the dust-laden gas is generated. When the fume pump 19 is working, a negative pressure is formed in the entire system, so that the dust-laden gas is sucked into the fume extractor 21 under the action of the pressure difference.

[0048] The air inlet pipe 22 connects the exhaust hood 21 to the air inlet 3 of the housing 1. It provides a channel for the dust-laden gas to be transferred from the exhaust hood 21 to the housing 1. After being collected by the exhaust hood 21, the dust-laden gas is transported to the housing 1 through the air inlet pipe 22 and then enters the filtration area of ​​the multi-stage filter screen 8 for subsequent dust removal. Through the cooperation of the exhaust hood 21 and the air inlet pipe 22, the dust-laden gas can be more effectively introduced into the multi-stage dust removal equipment, thereby improving the dust removal efficiency.

[0049] For example, such as Figure 2As shown, the present invention also includes an activated carbon plate 23 installed inside the box 1 near the air inlet 3, and a wire mesh 10 fixedly installed at the air inlet end of the exhaust hood 21.

[0050] When in use, the activated carbon plate 23 mainly plays the role of adsorption and purification. After the dust-laden gas enters the box 1 from the air inlet 3, it first comes into contact with the activated carbon plate 23. Activated carbon has a rich pore structure and a huge specific surface area, which can adsorb organic pollutants, odor substances and some harmful gases in the gas. When passing through the activated carbon plate 23, these harmful substances will adhere to the pore surface of the activated carbon, thereby achieving preliminary purification of the gas, reducing the types and contents of pollutants that need to be treated by the subsequent filter screen 8, and improving the overall purification effect of the entire dust removal equipment to a certain extent.

[0051] The wire mesh 10 fixedly installed at the air inlet end of the exhaust hood 21 mainly serves as a preliminary filter and protection. When dust-laden gas is sucked into the exhaust hood 21, the wire mesh 10 can block larger particulate impurities, such as larger dust clumps and debris, preventing these larger impurities from entering the air inlet pipe 22 and the housing 1, thus avoiding blockage or damage to subsequent components such as the activated carbon plate 23 and the filter screen 8. At the same time, it can also ensure that the gas entering the equipment is relatively uniform, which is conducive to the smooth progress of subsequent dust removal and purification processes.

[0052] It should be noted that this utility model is a multi-stage dust removal device. The square column 5 is installed on the support plate 4 through the second stud 16 and the second screw sleeve 17, and the feeding roller 6 is fixed to ensure that the position of the feeding roller 6 is stable.

[0053] Install the square post 5 on the support plate 4 through the first stud 14 and the first screw sleeve 15, fix the receiving roller 7, and connect the output end of the motor 13 coaxially to the end of the square post 5 near the receiving roller 7.

[0054] The transparent protective cover 9 is attached to both sides of the box body 1 by the first magnet 11 and the second magnet 12, covering the feeding roller 6 and the receiving roller 7.

[0055] A suction pipe 20 connects the suction pump 19 to the air outlet 2;

[0056] Place the exhaust hood 21 near the area where the dusty gas is generated, and connect the exhaust hood 21 to the air inlet 3 via the air inlet pipe 22.

[0057] Multiple filter screens 8 with different pore sizes are wound onto the feeding roller 6, and then the other end of the filter screen 8 is passed through the through groove 18 and wound onto the receiving roller 7, ensuring that the pore size of multiple filter screens 8 gradually decreases from the air inlet 3 to the air outlet 2.

[0058] Turn on the air pump 19 to generate negative pressure in the air extraction pipe 20, creating a pressure difference in the chamber 1. Under the action of the pressure difference, the dust-laden gas enters the chamber 1 from the air extraction hood 21 through the air inlet pipe 22. After entering the chamber 1, the dust-laden gas first passes through the activated carbon plate 23. The activated carbon adsorbs organic pollutants, odor substances and some harmful gases in the gas for preliminary purification. Then, the dust-laden gas passes through multiple filters 8 with different pore sizes. Larger dust particles are first intercepted by the first filter with larger pore size. As the gas flows, smaller dust particles are intercepted by subsequent filters with smaller pore sizes, achieving multi-stage filtration. The clean gas is discharged from the air outlet 2.

[0059] When a certain stage of filter screen becomes clogged or needs to be replaced, the motor 13 is started. The motor drives the square column 5 to rotate, which in turn drives the receiving roller 7 to rotate. The receiving roller 7 rolls up the used part of the filter screen, and the discharging roller 6 releases the new filter screen simultaneously to continue the dust removal work.

[0060] When maintenance is required on the feeding roller 6, receiving roller 7, or filter screen 8, unscrew the first screw sleeve 15 to remove the receiving roller 7, unscrew the second screw sleeve 17 to remove the feeding roller 6, remove the transparent protective cover 9, and inspect, repair, or replace parts of the feeding roller 6 and receiving roller 7 by separating the first magnet 11 and the second magnet 12.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage dust removal device, comprising a housing (1), characterized in that, One end of the box (1) is provided with an air outlet (2), and the other end of the box (1) is provided with an air inlet (3). Both sides of the box (1) are provided with through grooves (18). Both sides of the box (1) are symmetrically fixedly connected with multiple sets of support plates (4). Square columns (5) are installed between the multiple sets of support plates (4). Feeding rollers (6) and receiving rollers (7) are fixedly installed on the multiple sets of square columns (5). Multiple levels of filter screens (8) with different apertures are wound on the feeding rollers (6). The other end of the filter screens (8) passes through the through grooves (18) and is wound on the receiving rollers (7). The apertures of the multiple filter screens (8) gradually decrease from the air inlet (3) to the air outlet (2). Multiple transparent protective covers (9) are provided on both sides of the box (1). The feeding roller (6) and the receiving roller (7) are both located inside the transparent protective cover (9). The transparent protective cover (9) is in the same position and number as the feeding roller (6) and the receiving roller (7). A first magnet (11) is provided on the side of the transparent protective cover (9) close to the box (1). Second magnets (12) attracted by the first magnet (11) are provided on both sides of the box (1).

2. The multi-stage dust removal equipment according to claim 1, characterized in that: A motor (13) is fixedly installed on the support plate (4) near the receiving roller (7). The output end of the motor (13) is coaxially connected to one end of the square post (5) near the receiving roller (7). The other end of the square post (5) near the receiving roller (7) is fixedly connected to a first stud (14). The end of the first stud (14) away from the square post (5) passes through the support plate (4) and is threaded with a first threaded sleeve (15).

3. The multi-stage dust removal equipment according to claim 1, characterized in that: The square column (5) is fixedly connected to two ends near the feeding roller (6) with second studs (16), and the second studs (16) pass through the support plate (4) and are threaded with second threaded sleeves (17).

4. The multi-stage dust removal equipment according to claim 1, characterized in that: An air pump (19) is provided at one end of the housing (1), and an air extraction pipe (20) is connected between the air pump (19) and the air outlet (2).

5. A multi-stage dust removal device according to claim 1, characterized in that: The other end of the box (1) is provided with an air extraction hood (21), and an air inlet pipe (22) is connected between the air extraction hood (21) and the air inlet (3).

6. A multi-stage dust removal device according to claim 5, characterized in that: An activated carbon plate (23) is installed inside the box (1) near the air inlet (3), and a wire mesh (10) is fixedly installed at the air inlet end of the exhaust hood (21).

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