Dust remover with multi-stage filtering mechanism

Abstract

The invention discloses a dust remover with a multi-stage filtering mechanism, and relates to the technical field of chemical waste gas treatment.The dust remover comprises a center cylinder, a pre-filter and a filtering cloth bag, the filtering cloth bag is arranged in a traditional center cylinder, and a composite knocking assembly is arranged on the outer wall of the filtering cloth bag; the composite knocking assembly can knock the outer wall of a filter cloth bag and assist in dust falling when the pulse cloth bag filter carries out pulse back flushing, the problem that high-viscosity dust adheres is effectively solved, and the dust cleaning effect and the filter efficiency are improved; when the reversing driving assembly drives the knocking rod to move along the outer periphery of the filter cloth bag, on one hand, the path planning assembly of the pure mechanical structure drives the knocking rod to continuously knock in the horizontal direction to crush large-viscosity dust on the surface of the filter cloth bag into blocky dust blocks, and on the other hand, the path planning assembly drives the knocking rod to move in the vertical direction to crush the large-viscosity dust on the surface of the filter cloth bag into the blocky dust blocks. And the mud scraping tip is used for scraping dust blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical waste gas treatment, and particularly to a dust collector with a multi-stage filtering mechanism. Background Art

[0002] In order to avoid direct emission of chemical gases into the atmosphere and cause pollution to the atmosphere, it is necessary to perform dust removal treatment on chemical gases before their emission. In the process of industrial dust pollution and chemical gas treatment, there are many types of pollutants and large differences in particle sizes. A single filtering structure is difficult to efficiently intercept all particles. A multi-stage filtering mechanism can achieve hierarchical filtration: the front stage intercepts large particle dust, and the rear stage finely filters fine dust and harmful gases, improving the overall dust removal efficiency, extending the service life of the filter material, adapting to high-concentration and highly corrosive working conditions, ensuring compliance with emissions, and protecting the health of downstream equipment and operators.

[0003] In the prior art, a type of dust collector for performing fine filtration at the rear stage of chemical gases is a bag filter, which uses filter bags to separate solids from dust-containing gases. The principle is that when the dust-containing gas passes through the filter bags, the dust is intercepted on the outer surface of the filter bags, and the clean gas passes through the filter bags and is discharged. As the dust accumulates, most bag filter devices mostly use pulse jetting to make the dust fall off and maintain the filtration efficiency. However, when the bag filter filters chemical gases with high dust viscosity, the dust is easily adhered to the outer wall of the filter bags, forming an adhesion layer that is difficult to remove, resulting in an increase in the resistance of the filter bags, poor ventilation, and a decrease in the filtration efficiency. Under long-term operation, pulse jetting is difficult to completely remove the adhered dust, easily causing blockage or even damage to the filter bags, increasing the equipment maintenance frequency and operating costs. In severe cases, it may even cause system shutdown, affecting the stability and safety of the entire production process. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, a type of dust collector for performing fine filtration at the rear stage of chemical gases is a bag filter, which uses filter bags to separate solids from dust-containing gases. The principle is that when the dust-containing gas passes through the filter bags, the dust is intercepted on the outer surface of the filter bags, and the clean gas passes through the filter bags and is discharged. As the dust accumulates, most bag filter devices mostly use pulse jetting to make the dust fall off and maintain the filtration efficiency. However, when the bag filter filters chemical gases with high dust viscosity, the dust is easily adhered to the outer wall of the filter bags, forming an adhesion layer that is difficult to remove, resulting in an increase in the resistance of the filter bags, poor ventilation, and a decrease in the filtration efficiency. Under long-term operation, pulse jetting is difficult to completely remove the adhered dust, easily causing blockage or even damage to the filter bags, increasing the equipment maintenance frequency and operating costs. In severe cases, it may even cause system shutdown, affecting the stability and safety of the entire production process, and to propose a dust collector with a multi-stage filtering mechanism.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A dust collector with a multi-stage filtering mechanism, comprising a central cylinder, a pre-filter, and filter bags. The bottom of the side of the central cylinder is communicated with the air outlet end of the pre-filter. A gas collecting hopper is arranged at the bottom of the inner cavity of the central cylinder. A metal cage is fixedly arranged at the top of the gas collecting hopper. Filter bags are fixedly arranged on the outer wall of the metal cage through hoop fasteners. A guiding frustum is fixedly arranged at the bottom of the gas collecting hopper. A pulse valve is fixedly arranged on the side of the bottom of the gas collecting hopper. A U-shaped rod is arranged at the top of the inner cavity of the central cylinder. A composite knocking assembly for knocking the dust adhering to the outer wall of the filter bag in multiple directions is arranged at the top of the U-shaped rod. The composite knocking assembly includes a commutation driving assembly, a vertical shaft, knocking rods, and knocking blocks. The vertical shaft is rotatably connected to the top of the U-shaped rod. A docking frame is fixedly arranged at the bottom of the vertical shaft. A path planning assembly for planning the knocking path of the knocking rod is arranged at the top end of the knocking rod. The path planning assembly includes a horizontal rod, an inner guide ring, and an outer guide ring. A lifting and avoiding assembly is arranged inside the docking frame. The lifting and avoiding assembly drives the composite knocking assembly away from the outer wall of the filter bag, so as to facilitate the replacement of the filter bag.

[0006] Optionally, a one-way valve is arranged at the top of the air outlet end of the pre-filter. A vertical hopper is fixedly arranged at the bottom of the air inlet end of the pre-filter. An air inlet pipe is fixedly communicated with the side of the vertical hopper.

[0007] Optionally, an aggregation ring is sleeved on the outer wall of the guiding frustum. Aggregation rods are fixedly arranged on the side of the aggregation ring. A dust discharge valve is arranged at the bottom of the central cylinder.

[0008] Optionally, the commutation driving assembly includes an edge motor, a driving bevel gear, and a driven bevel gear. An edge motor is fixedly arranged at the top of the outer wall of the central cylinder. A horizontal shaft is fixedly arranged at the output end of the edge motor. A driving bevel gear is fixedly arranged at the end of the horizontal shaft. A driven bevel gear is fixedly arranged at the top of the vertical shaft. The driven bevel gear is stably meshed with the driving bevel gear.

[0009] Optionally, an inner guide ring is fixedly arranged at the top of the U-shaped rod. Bottom balls are arranged at equal intervals at the bottom of the inner guide ring. An outer guide ring is fixedly arranged at the edge position of the bottom of the U-shaped rod. Outer balls are arranged at equal intervals on the inner wall of the outer guide ring. Knocking blocks are arranged at equal intervals on the side wall of the knocking rod. Scraping tips are arranged at the upper and lower ends of the knocking block. Knocking protrusions are arranged on the side of the knocking block.

[0010] Optionally, the top of the knocking rod is set to be hemispherical. The top of the knocking rod contacts the bottom balls. A horizontal push rod is vertically fixedly arranged on the side of the knocking rod. The end of the horizontal push rod is set to be hemispherical. The hemispherical end of the horizontal push rod contacts the outer balls.

[0011] Optionally, an extension block is fixedly provided on the top of the side of the knocking rod, a mounting frame is fixedly provided on one end of the horizontal rod, a guide column is movably inserted into the side of the mounting frame, one end of the guide column is fixedly provided and fixedly connected to the side of the guide frame, and the side of the guide column is fixedly connected to one end of the horizontal spring.

[0012] Optionally, the path planning component includes a driving frame, a driven column, and a T-shaped rod, the other end of the horizontal rod extends into the side of the docking frame, and the side of the docking frame is sequentially provided with a first vertical groove, an inclined groove, and a second vertical groove along the vertical direction.

[0013] Optionally, a driven column is fixedly provided on the side of the horizontal rod, and the driven column extends into the first vertical groove or the inclined groove or the second vertical groove. A driving frame is movably sleeved on the outer wall of the horizontal rod, and a T-shaped rod is symmetrically fixedly provided on the side of the driving frame.

[0014] Optionally, the other end of the horizontal spring is fixedly connected to the side of the installation frame, a vertical groove is opened on the side of the guide frame, and an elastic column is fixedly installed after the extension block extends into the vertical groove, and the top of the elastic column is fixedly connected to the top of the vertical groove.

[0015] Optionally, a T-shaped slot is provided on the side of the docking frame, the T-shaped rod is movably inserted into the T-shaped slot, and an upper handle is fixedly provided on the bottom of the driving frame.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The present invention is provided with a filter bag inside a traditional central tube, and a composite knocking component is provided on the outer wall of the filter bag. The composite knocking component can knock on the outer wall of the filter bag when the pulse bag filter is performing pulse backblowing, so as to assist dust shedding, effectively solve the problem of high-viscosity dust adhesion, and improve the cleaning effect and filtration efficiency. A path planning component is provided on the side of the knocking rod of the composite knocking component. When the reversing drive component drives the knocking rod to move around the outside of the filter bag, the path planning component with a purely mechanical structure drives the knocking rod to continuously knock in the horizontal direction on the one hand, so as to break the high-viscosity dust on the surface of the filter bag into block-shaped dust blocks. On the other hand, the path planning component drives the knocking rod to move in the vertical direction, and uses the scraping tip on the knocking block to scrape off the dust blocks.

[0017] 2. The path planning component enables the knocking rod to knock continuously in the horizontal direction, which can effectively break up high-viscosity dust clumps, solve the problem that ordinary pulse backblowing is difficult to remove sticky dust, and reduce the risk of filter bag clogging from the source. The vertical displacement cooperates with the scraper tip on the knocking block to completely scrape off the broken but still attached dust blocks, ensuring the cleanliness of the filter bag surface and improving the cleaning integrity. The path planning component adopts a purely mechanical structure design and can achieve trajectory control without additional electronic control systems or sensors. It has a simple structure and high stability, reducing manufacturing costs and failure rates.

[0018] 3. The present invention is provided with a lifting avoidance component between the output end of the edge motor and the horizontal rod. When the entire bag filter is replacing the filter bag, the complex actions are simplified in a humanized way. The worker only needs to manually push up the drive frame, which is a single action, to automatically complete the multiple avoidance actions of the knocking rod "first move obliquely, then move upward", thereby avoiding cumbersome disassembly and assembly steps and improving maintenance efficiency. Secondly, the knocking rod can avoid the path planning component after moving obliquely, thereby preventing collision or accidental injury to the path component during the replacement process and extending the service life of the equipment.

[0019] 4. When the knocking rod is driven away from the outer wall of the filter bag by the lifting avoidance component, it can effectively prevent accidental touching of the filter bag and avoid damage to the filter bag during the replacement process. In addition, traditional bag replacement operations usually involve interference from many components, limited operating space, and are prone to scratches or jams. Through this design, the composite knocking component retreats as a whole to create ample operating space for workers, making it smoother to disassemble and assemble the metal cage and install the new filter bag, reducing labor intensity and improving work safety. Fast and smooth replacement operations mean that the system downtime is significantly shortened, which is conducive to rapid maintenance and recovery during continuous production, and improves the overall operation efficiency of the system and industrial economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 for Figure 1 Another perspective structural diagram of .

[0022] Figure 3 for Figure 2 Schematic diagram of the structure viewed from above.

[0023] Figure 4 for Figure 1 Schematic diagram of the structure of the inner cavity removal guide cone.

[0024] Figure 5 Schematic diagram of the distribution structure of filter bags and metal cages.

[0025] Figure 6 It is a schematic diagram of the coordination structure between the composite knocking component and the path planning component.

[0026] Figure 7 for Figure 6 Another perspective structural diagram of .

[0027] Figure 8 It is a structural schematic diagram of the lifting avoidance component and its connecting parts.

[0028] Figure 9 It is a structural schematic diagram of the lifting avoidance component.

[0029] Figure 10 It is a schematic structural diagram of a horizontal rod and its connecting piece.

[0030] Figure 11 It is a schematic structural diagram of a composite knocking assembly.

[0031] Figure 12 It is Figure 9 a schematic structural diagram from another perspective of

[0032] In the figure: 1. Central cylinder; 2. Guide frustum; 3. Aggregation ring; 4. Dust discharge valve; 5. Edge motor; 6. Check valve; 7. Prefilter; 8. Vertical hopper; 81. Air inlet pipe; 9. Air gathering hopper; 91. Pulse valve; 10. Filter cloth bag; 11. Hoop; 12. Metal cage; 13. U-shaped rod; 14. External guide ring; 141. External ball; 15. Internal guide ring; 151. Bottom ball; 16. Driving bevel gear; 17. Horizontal shaft; 18. Vertical shaft; 19. Driven bevel gear; 20. Horizontal rod; 200. Driven column; 21. Installation frame; 22. T-shaped groove; 23. Driving frame; 231. T-shaped rod; 232. Lifting handle; 24. Inclined groove; 25. Second vertical groove; 26. First vertical groove; 27. Docking frame; 28. Horizontal push rod; 29. Vertical groove; 30. Guide frame; 300. Horizontal spring; 3001. Guide post; 31. Extension block; 32. Elastic column; 33. Knocking rod; 34. Knocking block; 341. Mud scraping tip; 342. Knocking protrusion. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, 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 therefore should not be construed as a limitation to the present invention.

[0035] Refer to Figure 1-12, A dust collector with a multi-stage filtering mechanism, including a central cylinder 1, a pre-filter 7, and filter bags 10. The bottom of the side of the central cylinder 1 is connected to the air outlet end of the pre-filter 7. A one-way valve 6 is provided at the air outlet end of the pre-filter 7, which only allows the pre-filter 7 to blow gas into the central cylinder 1, and does not allow the central cylinder 1 to blow gas into the interior of the pre-filter 7. A vertical hopper 8 is provided at the air inlet end of the pre-filter 7, and an air inlet pipe 81 is provided on the side of the vertical hopper 8. A valve is provided at the bottom of the vertical hopper 8. The filtering structure of the pre-filter 7 is horizontally arranged at the top of the vertical hopper 8. The vertical hopper 8 is used for discharging the intercepted materials of large particles by the pre-filter 7.

[0036] At the bottom of the inner cavity of the central cylinder 1, there is an air-gathering hopper 9. At the top of the air-gathering hopper 9, a metal cage 12 is fixedly arranged. The outer wall of the metal cage 12 is fixedly provided with filter bags 10 through a hoop 11. The material of the filter bags 10 is polytetrafluoroethylene laminated needle felt, commonly known as PTFE filter bags or Teflon filter bags. The PTFE laminated needle felt filter bags have excellent acid and alkali corrosion resistance, can withstand high-temperature working conditions for a long time, have a smooth surface and are not easy to adhere to dust, effectively improving the dust cleaning efficiency and filtration accuracy. Its laminated structure realizes surface filtration, with a high initial efficiency, and is suitable for high-requirement chemical gas filtration scenarios.

[0037] The metal cage 12 holds up the filter bags 10. At the bottom of the air-gathering hopper 9, a guiding frustum 2 is fixedly arranged. An aggregation ring 3 is sleeved on the outer wall of the guiding frustum 2. The bottom of the guiding frustum 2 is in a hollow state for accommodating the hoop 11 that fixes the filter bags 10. Aggregation rods are fixedly arranged on the side of the aggregation ring 3. A dust discharge valve 4 is provided at the bottom of the central cylinder 1. The length of the aggregation rods is the length of the gap between the outer wall of the guiding frustum 2 and the inner cavity of the central cylinder 1. The user can rotate the aggregation ring 3 to use the aggregation rods to gather the dust scattered at the bottom of the central cylinder 1 to the dust discharge valve 4. The dust discharge valve 4 is in a closed state during the normal operation of the entire filter and during the pulsating backwashing of the filter bags 10, and is only opened when the central cylinder 1 conducts dust recovery.

[0038] A pulse valve 91 is fixedly arranged on the side of the bottom of the air-gathering hopper 9. The pulse valve 91 is a common electromagnetic valve with a timer in the prior art, which can be opened or closed periodically at a high frequency to blow high-pressure gas into the filter bags 10. When the air-gathering hopper 9 is in use, it needs to be externally connected to an exhaust system with a valve. When the pulse valve 91 is opened, the exhaust valve of the exhaust system is closed.

[0039] At the top of the inner cavity of the central cylinder 1, there is a U-shaped rod 13. At the top of the U-shaped rod 13, there is a composite knocking assembly for knocking the dust attached to the outer wall of the filter bags 10 in multiple directions. The composite knocking assembly includes a commutation driving assembly, a vertical shaft 18, knocking rods 33, and knocking blocks 34. The commutation driving assembly includes an edge motor 5, a driving bevel gear 16, and a driven bevel gear 19. The edge motor 5 is fixedly arranged at the top of the outer wall of the central cylinder 1.

[0040] A horizontal shaft 17 is fixedly arranged at the output end of the edge motor 5. A driving bevel gear 16 is fixedly arranged at the end of the horizontal shaft 17. A driven bevel gear 19 is fixedly arranged at the top of the vertical shaft 18. The driven bevel gear 19 is stably meshed with the driving bevel gear 16. The main structure of the central cylinder 1 includes a top cover, a cylinder body, and support columns arranged in an array at the bottom of the cylinder body. The top cover can be fixed to the top of the cylinder body by bolts. The commutation drive assembly allows the power source of the entire composite knocking assembly to be arranged on the side, facilitating the quick removal of the top cover from the cylinder body, so as to overhaul the internal components of the central cylinder 1.

[0041] The vertical shaft 18 is rotatably connected to the top of the U-shaped rod 13. A docking frame 27 is fixedly arranged at the bottom of the vertical shaft 18. A path planning assembly for planning the knocking path of the knocking rod 33 is arranged at the top end of the knocking rod 33. The path planning assembly includes a horizontal rod 20, an inner guide ring 15, and an outer guide ring 14. A lifting and avoiding assembly is arranged inside the docking frame 27. The lifting and avoiding assembly drives the composite knocking assembly away from the outer wall of the filter cloth bag 10, so as to facilitate the replacement of the filter cloth bag 10. An inner guide ring 15 is fixedly arranged at the top of the U-shaped rod 13. Bottom balls 151 are equidistantly arranged at the bottom of the inner guide ring 15. An outer guide ring 14 is fixedly arranged at the bottom edge position of the U-shaped rod 13. Outer balls 141 are equidistantly arranged on the inner wall of the outer guide ring 14. The top of the knocking rod 33 is set to be hemispherical. The top of the knocking rod 33 contacts the bottom balls 151. A horizontal push rod 28 is vertically and fixedly arranged on the side of the knocking rod 33. The end of the horizontal push rod 28 is set to be hemispherical. The hemispherical end of the horizontal push rod 28 contacts the outer balls 141.

[0042] Knocking blocks 34 are equidistantly arranged on the side wall of the knocking rod 33. Scraping tips 341 are arranged at the upper and lower ends of the knocking blocks 34. Knocking protrusions 342 are arranged on the side of the knocking blocks 34. An extension block 31 is fixedly arranged at the top of the side of the knocking rod 33. One end of the horizontal rod 20 is fixedly provided with a mounting frame 21. A guide post 3001 is movably inserted into the side of the mounting frame 21. One end of the guide post 3001 is fixedly connected to the side of the guide frame 30. One end of the guide post 3001 is fixedly connected to the side of the horizontal spring 300. The inner cavity length of the mounting frame 21 is greater than the length of the guide frame 30. Therefore, the mounting frame 21 allows the guide frame 30 to horizontally move within a certain range along the inner cavity of the mounting frame 21.

[0043] The other end of the horizontal spring 300 is fixedly connected to the side of the mounting frame 21. A vertical groove 29 is formed on the side of the guide frame 30. After the extension block 31 extends into the vertical groove 29, an elastic column 32 is fixedly arranged. The top of the elastic column 32 is fixedly connected to the top of the vertical groove 29. Therefore, the knocking rod 33 can displace within a certain range in the vertical direction. The vertical height of the vertical groove 29 is the displacement distance of the knocking rod 33 in the vertical direction.

[0044] The path planning component includes a driving frame 23, a driven column 200, and a T-shaped rod 231. The other end of the horizontal rod 20 extends into the side of the docking frame 27. The side of the docking frame 27 is successively provided with a first vertical groove 26, an inclined groove 24, and a second vertical groove 25 in the vertical direction. A driven column 200 is fixedly arranged on the side of the horizontal rod 20, and the driven column 200 extends into the first vertical groove 26 or the inclined groove 24 or the second vertical groove 25. The outer wall of the horizontal rod 20 is movably sleeved with a driving frame 23, and T-shaped rods 231 are symmetrically fixedly arranged on the side of the driving frame 23.

[0045] A T-shaped groove 22 is provided on the side of the docking frame 27, and the T-shaped rod 231 is movably inserted into the T-shaped groove 22. The T-shaped groove 22 assists the T-shaped rod 231 to stably displace in the vertical direction. A lifting handle 232 is fixedly arranged at the bottom of the driving frame 23. The first vertical groove 26 and the second vertical groove 25 are in a parallel state. Since the driven column 200 displaces along the first vertical groove 26, the inclined groove 24, and the second vertical groove 25, the corresponding horizontal rod 20 will move horizontally. In order to prevent the horizontal rod 20 from warping when the path planning component drives the horizontal rod 20 to move obliquely upward, since the driving frame 23 is sleeved on the outer wall of the horizontal rod 20, and the cooperation between the T-shaped rod 231 and the T-shaped groove 22 only allows the driving frame 23 to displace in the vertical direction, the setting of the driving frame 23 can solve the warping phenomenon of the horizontal rod 20.

[0046] It should be added that the filtering aperture of the internal filtering structure of the pre-filter 7 is set relatively large. A metal disc is arranged at the top of the filter bag 10, which does not have a filtering function. The positions of the bottom balls 151 and the external balls 141 arranged in an array need to be set appropriately, and the material of the knocking protrusion 342 is rubber. When the knocking protrusion 342 on the side of the knocking block 34 knocks on the side of the filter bag 10, the scraping mud tip 341 on the side of the knocking block 34 displaces in the vertical direction, and at the same time, the waste dust block is scraped off.

[0047] The specific implementation steps and principles of the present invention are as follows: The air inlet pipe 81 is externally connected to the exhaust gas emission system of the chemical system. The large-particle dust in the exhaust gas is filtered by the pre-filter 7. The exhaust gas passes through the outer wall of the filter bag 10 and finally discharges from the bottom of the air collecting hopper 9. The small particles in the exhaust gas are intercepted outside the filter bag 10. The bottom of the driving frame 23 is not subjected to an upward thrust, and the driven column 200 is inside the second vertical groove 25. At this time, the knocking block 34 on the side of the knocking rod 33 fits against the outer wall of the filter bag 10.

[0048] When it is necessary to perform backblowing cleaning on the filter bag 10, the pulse valve 91 is opened. The pulse valve 91 is intermittently opened to blow pulsating gas into the interior of the filter bag 10. At the same time, the edge motor 5 is started. The edge motor 5 drives the knocking rod 33 of the docking frame 27 and the horizontal rod 20 to rotate around the outside of the filter bag 10 through the driving bevel gear 16 and the driven bevel gear 19. On the one hand, the end of the horizontal push rod 28 continuously contacts the outer ball 141 on the side of the outer guide ring 14, and the knocking block 34 knocks on the outer wall of the filter bag 10. On the other hand, the top of the knocking rod 33 continuously crosses the bottom ball 151 at the bottom of the inner guide ring 15, and the scraping tip 341 on the side of the knocking block 34 on the side of the knocking rod 33 scrapes off the waste dust block on the outer wall of the filter bag 10.

[0049] When it is necessary to replace the filter bag 10, the central cylinder 1 is opened. Manpower lifts the upper lifting handle 232 to push the horizontal rod 20 upward through the driving frame 23. The driven column 200 moves along the second vertical groove 25, the inclined groove 24, and the first vertical groove 26, driving the knocking rod 33 to displace along an inclined path to avoid the inner guide ring 15. At this time, the knocking rod 33 is removed from the outside of the filter bag 10. The worker lifts the guiding conical platform 2, loosens the hoop 11, then pulls out the filter bag 10, sleeved with the filter bag 10 on the outer wall of the metal cage 12, locks the hoop 11, and lowers the guiding conical platform 2.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A dust collector with a multi-stage filtering mechanism, comprising a central cylinder, a pre-filter, and filter bags, characterized in that, The bottom of the side of the central cylinder is communicated with the air outlet end of the pre-filter. A gas collecting hopper is arranged at the bottom of the inner cavity of the central cylinder. A metal cage for expanding a flat filter cloth bag into a cylindrical shape is fixedly arranged at the top of the gas collecting hopper. The outer wall of the metal cage is fixedly provided with a filter cloth bag through a hoop. A guiding frustum is fixedly arranged at the bottom of the gas collecting hopper. A pulse valve for intermittently blowing gas into the inside of the filter cloth bag is fixedly arranged on the side of the bottom of the gas collecting hopper; A U-shaped rod is arranged at the top of the inner cavity of the central cylinder. A composite knocking assembly for knocking the dust attached to the outer wall of the filter cloth bag in multiple directions is arranged at the top of the U-shaped rod. The composite knocking assembly is composed of a commutation driving assembly, a vertical shaft, a knocking rod, and a knocking block. The vertical shaft is rotatably connected to the top of the U-shaped rod. A docking frame is fixedly arranged at the bottom of the vertical shaft. A path planning assembly for planning the knocking path of the knocking rod is arranged at the top end of the knocking rod, so that the knocking rod moves along a specified path. The path planning assembly includes a horizontal rod, an inner guide ring, and an outer guide ring. The inner guide ring is fixedly arranged at the top of the U-shaped rod. Bottom balls are equidistantly arranged at the bottom of the inner guide ring. The outer guide ring is fixedly arranged at the edge position of the bottom of the U-shaped rod. Outer balls are equidistantly arranged on the inner wall of the outer guide ring. Knocking blocks are equidistantly arranged on the side wall of the knocking rod. Scraping tips are arranged at the upper and lower ends of the knocking block. Knocking protrusions are arranged on the side of the knocking block; When the commutation driving assembly drives the knocking rod to rotate around the outer periphery of the filter cloth bag, the knocking rod is forced to move along a specified path under the control of the path planning assembly. A lifting and avoiding assembly is arranged inside the docking frame. The lifting and avoiding assembly will drive the composite knocking assembly away from the outer wall of the filter cloth bag when replacing the filter cloth bag, leaving an operating space for replacing the filter cloth bag.

2. The dust collector with a multi-stage filtering mechanism according to claim 1, characterized in that, A one-way valve is arranged at the top of the air outlet end of the pre-filter. A vertical hopper is fixedly arranged at the bottom of the air inlet end of the pre-filter. An air inlet pipe is fixedly communicated with the side of the vertical hopper.

3. The dust collector with a multi-stage filtering mechanism according to claim 1, characterized in that, An aggregation ring is sleeved on the outer wall of the guiding frustum. Aggregation rods are fixedly arranged on the side of the aggregation ring. A dust discharge valve is arranged at the bottom of the central cylinder.

4. The dust collector with a multi-stage filtering mechanism according to claim 1, wherein, The commutation driving assembly includes an edge motor, a driving bevel gear, and a driven bevel gear. The edge motor is fixedly arranged at the top of the outer wall of the central cylinder. A horizontal shaft is fixedly arranged at the output end of the edge motor. A driving bevel gear is fixedly arranged at the end of the horizontal shaft. A driven bevel gear is fixedly arranged at the top of the vertical shaft. The driven bevel gear is stably meshed with the driving bevel gear.

5. The dust collector with a multi-stage filtering mechanism according to claim 4, characterized in that, The top of the knocking rod is formed into a hemispherical shape. The top of the knocking rod contacts the bottom ball. A horizontal push rod is vertically fixedly arranged on the side of the knocking rod. The end of the horizontal push rod is formed into a hemispherical shape. The hemispherical end of the horizontal push rod contacts the outer ball.

6. The dust collector with a multi-stage filtering mechanism according to claim 5, characterized in that, An extension block is fixedly arranged at the top of the side of the knocking rod. One end of the horizontal rod is fixedly provided with an installation frame. A guiding column is movably inserted into the side of the installation frame. One end of the guiding column is fixedly connected to the side of the guiding frame. One end of a horizontal spring is fixedly connected to the side of the guiding column.

7. The dust collector with a multi-stage filtering mechanism according to claim 5, characterized in that, The path planning component includes a driving frame, a driven column, and a T-shaped rod. The other end of the horizontal rod extends into the side surface of the docking frame, and the side surface of the docking frame is sequentially provided with a first vertical groove, an inclined groove, and a second vertical groove along the vertical direction.

8. The dust collector with a multi-stage filtering mechanism according to claim 7, characterized in that, A driven column is fixedly arranged on the side surface of the horizontal rod. The driven column extends into the first vertical groove, the inclined groove, or the second vertical groove. A driving frame is movably sleeved on the outer wall of the horizontal rod, and T-shaped rods are symmetrically and fixedly arranged on the side surface of the driving frame.

9. The dust collector with a multi-stage filtering mechanism according to claim 8, wherein, The other end of the horizontal spring is fixedly connected to the side surface of the mounting frame. A vertical groove is provided on the side surface of the guiding frame. After the extending block extends into the vertical groove, an elastic column is fixedly arranged, and the top end of the elastic column is fixedly connected to the top of the vertical groove.

10. A dust collector with a multi-stage filtering mechanism according to claim 9, characterized in that, A T-shaped groove is provided on the side surface of the docking frame. The T-shaped rod is movably inserted into the T-shaped groove, and a lifting handle is fixedly arranged at the bottom of the driving frame.

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