Purifying and filtering structure for air inlet of fan

Abstract

The invention relates to the technical field of fan filtration, in particular to a purification and filtration structure for a fan air inlet, which comprises a fan box, a bag filter inserted in the fan box in a sliding manner, a swing mechanism alternately utilizing the inner side surface of the bag filter for filtration, and a dust collection mechanism for regularly cleaning and gathering dust and sundries, according to the bag type filter disclosed by the invention, the supporting framework and the driving assembly are used for synergistically acting, so that a filter bag of the bag type filter realizes reciprocating deflection, two inner side surfaces of the filter bag alternately perform windward filtration, and the limitation that a traditional filter bag always windward with a fixed surface is broken through; according to the device, the filter bag can be clamped and moved leftwards to be stroked in the swinging process of the filter bag, dust and impurities accumulated in the bag are gathered to a specific area, disordered diffusion is avoided, the inner side face of the filter bag can be scraped in cooperation with an inner scraper, and the scraping, sweeping and collecting effects on the impurities are further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of fan filtration, and specifically to a purification and filtration structure for the air inlet of a fan. Background Art

[0002] Existing fan systems usually consist of a fan box, a blower fan, and a bag filter. The fan box serves as the main structure, with a blower fan installed inside to drive the airflow. The bag filter is fixed at the air inlet of the fan box by means of sliding insertion, used to intercept impurities such as dust and particulate matter in the air, protect the internal components of the fan from contamination, and ensure the cleanliness of the output airflow.

[0003] The core structure of the bag filter includes a rigid frame and a number of filter bags evenly distributed along the frame. The filter bags are made of filter materials. When the airflow passes through the filter bags from the air inlet and blows into the fan box, the filter bags intercept the impurities in the airflow on their inner sides. A skeleton for撑开 the filter bags is provided on the frame, so that the airflow can smoothly blow into the interior of the filter bags.

[0004] However, due to the existing skeleton being fixedly arranged, the filter bags always filter against the wind at a fixed position on the inner side. After long-term use, the windward side is prone to clogging due to the accumulation of impurities, resulting in a significant decrease in the air flow rate. It is necessary to frequently stop the machine for cleaning or replace the filter bags, thus the filter bags cannot be fully utilized. In addition, the traditional structure lacks an active mechanism for collecting and cleaning the debris inside the bags, and dust is prone to accumulate disorderly inside the filter bags, which not only accelerates the clogging but also increases the filtration resistance.

[0005] To address these problems, there is an urgent need for a purification and filtration structure that can dynamically switch the filtration surface and simultaneously achieve automatic dust collection to improve the filtration efficiency and reduce the maintenance cost. Summary of the Invention

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a purification and filtration structure for the air inlet of a fan, including a fan box, a bag filter slidably inserted inside the fan box, a swinging mechanism for alternately using the inner sides of the bag filter for filtration, and a dust collection mechanism for regularly cleaning and aggregating dust and debris.

[0007] The swinging mechanism includes a support skeleton in a U-shaped structure that is evenly distributed in the front-rear direction and rotatably arranged inside the bag filter, and a driving component that drives the bag filter to reciprocate back and forth and deflect, so as to make the support skeleton swing the filter bags of the bag filter back and forth, facilitating the two inner sides of the filter bags to alternately face the wind for filtration. A dust shaking component for vibrating the non-windward side of the filter bags is provided on the support skeleton.

[0008] The dust collection mechanism includes two synchronous support plates fixedly installed on the upper and lower end faces of the support skeleton. Two rollers and two outer scrapers are arranged on the two synchronous support plates through a guiding assembly. The two rollers are located on the left side of the two outer scrapers. The two rollers are used to always clamp the filter bag to prevent sundries from escaping. The two outer scrapers move the gathered sundries by clamping the filter bag when moving leftward.

[0009] Preferably, the driving assembly includes an electric cylinder fixedly installed on the inner upper side of the fan box. A guiding plate is fixedly installed on the end face of the telescopic section of the electric cylinder. A U-shaped frame is slidably arranged under the guiding plate. The U-shaped frame is locked with the frame of the bag filter as a whole through fastening screws.

[0010] Preferably, a C-shaped plate is slidably arranged on the left side of two synchronous support plates at corresponding upper and lower positions. A rotating rod is slidably arranged on the two horizontal sections of the C-shaped plate. The upper and lower parts of the rotating rod are cylindrical. The inner upper side of the fan box is slidably connected with a limiting plate through a spring telescopic rod. Through holes are equidistantly arranged on the limiting plate along the front-back direction. An adjusting screw threadedly connected with the vertical section of the C-shaped plate is rotatably connected to the rotating rod.

[0011] Preferably, the guiding assembly includes two linkage support plates fixedly installed at the right ends of the horizontal sections of the C-shaped plate. The right sides of the two linkage support plates are slidably connected with the two outer scrapers front and back. Two sliders arranged front and back are slidably arranged on the left side of the linkage support plates. A spiral spring is arranged between the sliders and the linkage support plates. The upper and lower corresponding sliders are rotatably connected with the corresponding rollers.

[0012] Preferably, a damping telescopic rod is fixedly installed on the upper side of the upper synchronous support plate. The left end of the damping telescopic rod is hinged with two connecting rod members through a connecting piece. The connecting rod members are hinged with the corresponding outer scrapers.

[0013] Preferably, an inner scraper is slidably arranged on the support skeleton. A pushing spring is arranged between the inner scraper and the support skeleton. A notch matching the thickness of the inner scraper is arranged on the outer scraper. Triangular plates for pushing the outer scraper are fixedly installed on the front and back sides of the upper synchronous support plate.

[0014] Preferably, the dust shaking assembly includes a rotating pipe rotatably arranged on the support skeleton through a yaw unit. A plurality of knocking hammers are arranged on the outer side of the middle part of the rotating pipe. Two fan blades arranged up and down are fixedly installed on the outer side of the rotating pipe.

[0015] Preferably, the yaw unit includes fixed support plates symmetrically and fixedly installed on the frame of the bag filter up and down. A swing plate is hinged at the left end of the fixed support plate. A waist-shaped groove is arranged on the horizontal section of the support skeleton. The lower side of the swing plate slides inside the waist-shaped groove through a convex column. The left ends of the upper and lower corresponding swing plates are fixedly installed with a connecting round rod together. The rotating pipe is rotatably sleeved on the outer side of the connecting round rod.

[0016] Preferably, a plurality of groups of expansion plates corresponding to the filter bags of the bag filter are hinged on the frame of the bag filter, and each group is composed of two expansion plates distributed front and back and forming an eight-shaped structure. The middle part of the expansion plate is a rectangular groove structure, and a plurality of V-shaped plates are fixedly installed at equal intervals inside the rectangular groove of the expansion plate along its length direction.

[0017] Preferably, a crank plate is fixedly mounted on the lower side of the expansion plate, and a cooperative support plate is hinged between the crank plate on each group of expansion plates and the lower synchronous support plate, so that all the crank plates are always arranged in parallel with the synchronous support plate.

[0018] The beneficial effects of the present invention are as follows: 1. The present invention adopts the synergistic effect of the supporting frame and the driving component to enable the filter bag of the bag filter to achieve reciprocating deflection, so that the two inner sides of the filter bag are alternately facing the wind for filtering, breaking through the limitation of the traditional filter bag that always faces the wind with a fixed side, while making full use of the two inner sides of the filter bag. The periodic vibration of the non-windward side of the filter bag by the dust shaking component can further shake off the attached dust, significantly extending the cleaning cycle of the filter bag, reducing the frequency of shutdown maintenance, and improving the stability of airflow rate.

[0019] 2. The present invention adopts the linkage of the outer scraper and the roller through the guide component, which can clamp and move the filter bag to the left during the swinging process of the filter bag, so as to gather the dust and debris accumulated in the bag to a specific area to avoid disorderly diffusion. In combination with the inner scraper, the inner side of the filter bag can be scraped to further enhance the scraping and collection effect of the debris. This design not only reduces the filtration resistance of the filter bag, but also reduces the need for manual intervention through centralized cleaning, thereby improving operation continuity.

[0020] 3. The present invention adopts an expansion plate to coordinate the support plate with the support frame, so that the expansion plate and the synchronous support plate can swing synchronously. The support of the expansion plate can keep the bag mouth of the filter bag always open to ensure smooth flow of air to the inside of the filter bag. The V-shaped plate on the expansion plate can also block and capture impurities escaping due to the vortex effect in the bag, and at the same time, these impurities are directly guided to the side of the filter bag, thereby increasing the effect of scraping and collecting debris.

[0021] Fourth, the electric cylinder in the driving assembly of the present invention can not only drive the filter bag to swing back and forth, but also drive the bag opening position of the filter bag to move back and forth by reciprocating the frame, thereby preventing the bag opening position of the filter bag from being always fixed, thereby ensuring the uniformity of impurity filtration by each filter bag, making full use of each filter bag, further reducing the frequency of shutdown maintenance, and improving operation continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is the first cross-sectional view of the present invention.

[0024] Figure 2 is the second cross-sectional view of the present invention.

[0025] Figure 3 is the cross-sectional view of the bag filter, support skeleton, dust shaking assembly and outer scraper in the present invention.

[0026] Figure 4 is the top view of the damping telescopic rod, linkage support plate, roller and outer scraper in the present invention.

[0027] Figure 5 is the partial structural schematic diagram of the bag filter, dust shaking assembly and synchronous support plate in the present invention.

[0028] Figure 6 is the state change diagram of the swing plate deflecting from the left-right horizontal arrangement to the inclined arrangement in the present invention.

[0029] Figure 7 is the partial cross-sectional view of the bag filter, expansion support plate member, V-shaped plate and crank plate in the present invention.

[0030] Figure 8 is the structural schematic diagram of the synchronous support plate, expansion support plate member, crank plate and cooperation support plate in the present invention.

[0031] In the figure: 1. Fan box; 2. Bag filter; 3. Swing mechanism; 4. Dust collection mechanism; 31. Support skeleton; 32. Driving assembly; 33. Dust shaking assembly; 41. Synchronous support plate; 42. Guide assembly; 43. Roller; 44. Outer scraper; 45. Inner scraper; 46. Expansion support plate member; 321. Electric cylinder; 322. Guide plate; 323. U-shaped frame; 324. C-shaped plate; 325. Rotating rod; 326. Spring telescopic rod; 327. Limiting plate; 328. Adjusting screw; 331. Yaw unit; 332. Rotating tube; 333. Hammer; 334. Fan blade; 335. Fixed support plate; 336. Swing plate; 337. Connecting round rod; 421. Linkage support plate; 422. Slide block; 423. Damping telescopic rod; 424. Link member; 451. Triangular plate; 461. V-shaped plate; 462. Crank plate; 463. Cooperation support plate. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The following described embodiments are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. For those not specified in the embodiments regarding specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in the field or according to the product specifications.

[0033] Refer to Figure 1 and Figure 2 , a purification and filtration structure for the air inlet of a fan, comprising a fan box 1, a bag filter 2 slidably inserted inside the fan box 1, a swing mechanism 3 that alternately uses the inner side surfaces of the bag filter 2 for filtration, and a dust collection mechanism 4 that regularly cleans and accumulates dust and debris.

[0034] When the bag filter 2 is in operation, the swing mechanism 3 can drive the frame of the bag filter 2 to move back and forth, thereby preventing the position of the bag mouth of the filter bag from remaining fixed all the time, ensuring the uniformity of impurity filtration for each filter bag. Moreover, while the frame moves back and forth, it can also swing the filter bag back and forth left and right, so that the two inner side surfaces of the filter bag alternately face the wind for filtration, thus making full use of the two inner side surfaces of the filter bag for filtration.

[0035] At the same time, the dust collection mechanism 4 can also cooperate with the swing mechanism 3 to gather the dust and debris accumulated in the bag to the bottom of the filter bag, preventing the disorderly diffusion of impurities, reducing the filtration resistance of the filter bag, and also reducing the need for manual intervention through centralized cleaning, improving the operation continuity.

[0036] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 , the swing mechanism 3 includes a support frame 31 in a U-shaped structure that is evenly distributed in the front-rear direction and rotatably arranged inside the bag filter 2, and a driving component 32 that drives the bag filter 2 to move back and forth and deflect, so as to swing the filter bag of the bag filter 2 reciprocally, facilitating the two inner side surfaces of the filter bag to alternately face the wind for filtration.

[0037] Refer to Figure 1 and Figure 2 , the driving component 32 includes an electric cylinder 321 fixedly installed on the upper side surface inside the fan box 1. A guide plate 322 is fixedly installed on the end surface of the telescopic section of the electric cylinder 321. A U-shaped frame 323 is slidably arranged up and down on the lower side of the guide plate 322. The U-shaped frame 323 is locked with the frame of the bag filter 2 into a whole through fastening screws.

[0038] Refer to Figure 1 , Figure 2 and Figure 3, the dust collection mechanism 4 includes two synchronous support plates 41 fixedly installed on the upper and lower end faces of the support skeleton 31. Two rollers 43 and two outer scraping plates 44 are jointly arranged on the two synchronous support plates 41 through a guiding component 42. The two rollers 43 are located on the left side of the two outer scraping plates 44. The two rollers 43 are used to always clamp the filter bag to prevent sundries from escaping. The two outer scraping plates 44 move leftward to clamp the filter bag to scrape and gather sundries.

[0039] Continue to refer to Figure 1 , Figure 2 and Figure 3 , a C-shaped plate 324 is slidably arranged on the left side of the two synchronous support plates 41 at the upper and lower corresponding positions. A rotating rod 325 is slidably arranged on the two horizontal sections of the C-shaped plate 324. Both the C-shaped plate 324 and the rotating rod 325 can slide in the left-right direction. The upper and lower parts of the rotating rod 325 are cylindrical. The upper side of the inner part of the blower box 1 is slidably connected with a limiting plate 327 through a spring telescopic rod 326. Through holes are equidistantly arranged on the limiting plate 327 in the front-rear direction. An adjusting screw 328 is rotatably connected to the rotating rod 325 and is threadedly connected to the vertical section of the C-shaped plate 324.

[0040] In the initial state, the bag filter 2 is slidably inserted at the position of the air inlet of the blower box 1, and the bag mouth of the filter bag on the bag filter 2 faces the air inlet position. The two vertical sections of the U-shaped frame 323 slide downward to the outside of the frame of the bag filter 2, and the U-shaped frame 323 and the frame of the bag filter 2 are locked into a whole by screwing the fastening screws. At the same time, the spring telescopic rod 326 pushes the limiting plate 327 downward through its own elastic force, so that the limiting plate 327 abuts against the rotating rod 325. At the same time, the cylindrical structure on the upper part of the rotating rod 325 is inserted into the through hole of the limiting plate 327, so that the rotating rod 325 can rotate around the axis of the through hole of the limiting plate 327.

[0041] When the blower box 1 starts to work, a negative pressure is formed inside the blower box 1, so that the air flow passes through the filter bag of the bag filter 2 through the air inlet and flows into the blower box 1. At the same time, the telescopic section of the reciprocating telescopic electric cylinder 321 is reciprocated, so that the electric cylinder 321 drives the frame of the bag filter 2 to move back and forth through the guide plate 322 and the U-shaped frame 323, thereby preventing the bag mouth position of the filter bag from remaining fixed all the time, ensuring the uniformity of impurity filtration of each filter bag, making full use of each filter bag, further reducing the frequency of shutdown maintenance, and improving the operation continuity.

[0042] The frame of the bag filter 2 drives the right end of the synchronous support plate 41 to move synchronously through the support skeleton 31, so that the synchronous support plate 41 drives the rotating rod 325 to rotate through the C-shaped plate 324. Thus, during the reciprocating movement of the bag filter 2 back and forth, the synchronous support plate 41 drives the support skeleton 31 at the corresponding position to deflect axially back and forth around the rotating rod 325, and the support skeleton 31 simultaneously drives the filter bag of the bag filter 2 to deflect reciprocally. Furthermore, the filter bag of the bag filter 2 filters against the wind alternately through its two inner sides before and after, breaking through the limitation that the traditional filter bag always faces the wind with a fixed surface.

[0043] Refer to Figure 3 、 Figure 5 and Figure 6 As shown in, a dust shaking assembly 33 for vibrating the non-windward surface of the filter bag is arranged on the support skeleton 31. The dust shaking assembly 33 includes a rotating tube 332 rotatably arranged on the support skeleton 31 through a yaw unit 331. A plurality of knocking hammers 333 are arranged on the outer side of the middle part of the rotating tube 332, and two fan blades 334 arranged up and down are fixedly installed on the outer side of the rotating tube 332.

[0044] Refer to Figure 5 and Figure 6 As shown in, the yaw unit 331 includes fixed support plates 335 symmetrically and fixedly installed on the frame of the bag filter 2 up and down. A swing plate 336 is hinged to the left end of the fixed support plate 335. A waist-shaped groove is formed on the horizontal section of the support skeleton 31. The lower side of the swing plate 336 slides inside the waist-shaped groove through a convex column. The left ends of the two corresponding swing plates 336 up and down are jointly fixedly installed with a connecting round rod 337, and the rotating tube 332 is rotatably sleeved on the outer side of the connecting round rod 337.

[0045] When the support skeleton 31 drives the filter bag at the corresponding position to deflect to one side, the side of the filter bag opposite to the deflection direction of the support skeleton 31 faces the bag mouth position of the filter bag, so that the side of the filter bag opposite to the deflection direction of the support skeleton 31 filters against the wind. At the same time, the support skeleton 31 pushes the swing plate 336 in the same direction as the deflection of the support skeleton 31 through the waist-shaped groove on it, so that the swing plate 336 rotates along the hinge point with the fixed support plate 335, and an included angle appears between the swing plate 336 and the horizontal section of the support skeleton 31, so that the deflection angle of the swing plate 336 is greater than that of the support skeleton 31.

[0046] Furthermore, the swing plate 336 drives the knocking hammer 333 on the rotating tube 332 to contact an inner side surface of the filter bag that is not windward through the connecting round rod 337. At the same time, the air flow drives the fan blade 334 to rotate, and the fan blade 334 drives the knocking hammer 333 through the rotating tube 332 to vibrate and shake the dust on the non-windward side of the filter bag, so as to extend the cleaning cycle of the filter bag, reduce the frequency of shutdown maintenance, and improve the stability of the air flow rate.

[0047] It should be noted that a protective cover covering the outside of the fan blade 334 is fixedly installed on the connecting round rod 337 to prevent the fan blade 334 from touching the filter bag and causing the fan blade 334 to stop rotating.

[0048] Refer to Figure 1 、 Figure 3 and Figure 4 As shown in, the guiding assembly 42 includes two linkage support plates 421 fixedly installed at the right end of the horizontal section of the U-shaped plate 324. The right sides of the two linkage support plates 421 are jointly and slidably connected to the front and rear of the two outer scraping plates 44. Two sliders 422 arranged front and rear are slidably arranged on the left side of the linkage support plate 421. A spiral spring is arranged between the slider 422 and the linkage support plate 421. The upper and lower corresponding sliders 422 are jointly and rotatably connected to the roller 43 at the corresponding position.

[0049] When the synchronous support plate 41 does not deflect, that is, when the synchronous support plate 41 is perpendicularly arranged with the frame of the bag filter 2, the bag filter 2 drives the synchronous support plate 41 to be in the position closest to the vertical section of the U-shaped plate 324. At this time, the operator manually rotates the adjusting screw rod 328 in advance to drive the U-shaped plate 324 to move to the right relative to the rotating rod 325, so that the U-shaped plate 324 drives the two outer scraping plates 44 and the two rollers 43 to move to the front and rear sides of the corresponding filter bags through the linkage support plates 421. At the same time, the spiral spring pushes the slider 422 through its own elastic force, and the slider 422 drives the roller 43 to squeeze on the filter bag, and the roller 43 squeezes and abuts the corresponding positions of the filter bag together, thereby closing the bottom position of the filter bag to prevent impurities concentrated at the bottom of the bag from escaping.

[0050] In this embodiment, by rotating the adjusting screw rod 328, the positions of the two outer scraping plates 44 and the two rollers 43 relative to the filter bag can be adjusted, so as to facilitate the disassembly and replacement of the filter bag.

[0051] Refer to Figure 3 and Figure 4 As shown in, a damping telescopic rod 423 is fixedly installed on the upper side of the upper synchronous support plate 41. The left end of the damping telescopic rod 423 is hinged with two connecting rod members 424 through a connecting piece, and the connecting rod members 424 are hinged with the outer scraping plate 44 at the corresponding position.

[0052] Refer to Figure 3 、 Figure 4 and Figure 5 As shown in, an inner scraping plate 45 is slidably arranged on the support skeleton 31. A pushing spring is arranged between the inner scraping plate 45 and the support skeleton 31. A notch matching the thickness of the inner scraping plate 45 is formed on the outer scraping plate 44. Triangular plates 451 for pushing the outer scraping plate 44 are fixedly installed on the front and rear sides of the upper synchronous support plate 41.

[0053] When the synchronous support plate 41 is not deflected, the outer scraper 44 is located on the right side of the inner scraper 45. At the same time, the outer scraper 44 is located on the right side of the triangular plate 451. When the synchronous support plate 41 starts to deflect, the synchronous support plate 41 gradually moves away from the vertical section of the C-shaped plate 324, causing the linkage support plate 421 to move leftward relative to the synchronous support plate 41. As a result, the linkage support plate 421 drives the two outer scrapers 44 and the two rollers 43 to move leftward synchronously relative to the synchronous support plate 41.

[0054] The linkage support plate 421 pulls the telescopic section of the damping telescopic rod 423 to the left through the two outer scrapers 44 and the connecting rod member 424. Due to the slow extension of the telescopic section of the damping telescopic rod 423, the damping telescopic rod 423 drives the two outer scrapers 44 to approach each other to squeeze the filter bag through the reaction force on the connecting rod member 424, so that the two outer scrapers 44 stroke the filter bag.

[0055] When the two outer scrapers 44 move to the position of the inner scraper 45, the outer scraper 44 pushes the inner scraper 45 to move synchronously隔着 the filter bag, causing the inner scraper 45 to scrape the inner side of the filter bag, thereby increasing the effect of collecting impurities inside the filter bag. When the synchronous support plate 41 deflects back to the direction perpendicular to the frame of the bag filter 2, the telescopic section of the damping telescopic rod 423 drives the two outer scrapers 44 to move away from the synchronous support plate 41 and move back to the right by pushing the connecting rod member 424, so as to prevent the outer scraper 44 from pushing the impurities towards the bag mouth position of the filter bag.

[0056] After the two outer scrapers 44 move away from each other, the pushing spring pushes the inner scraper 45 to move back to the right through its own elastic force. At the same time, the roller 43 moves synchronously with the outer scraper 44, and the roller 43 rolls on the filter bag, so that the roller 43 rolls over the impurities inside the filter bag and seals the impurities at the bottom of the filter bag to prevent the impurities from escaping.

[0057] It should be noted that the triangular plate 451 is located at the upper part of the vertical section of the corresponding support frame 31. When the operator manually rotates the adjusting screw 328 to drive the two outer scrapers 44 to move away from the filter bag, the triangular plate 451 can push the two outer scrapers 44 away from the synchronous support plate 41 through the inclined surface thereon, thereby preventing the vertical section of the support frame 31 from blocking the movement of the two outer scrapers 44, so as to facilitate the quick disassembly and replacement of the filter bag.

[0058] Refer to Figure 3 and Figure 7 On the frame of the bag filter 2, several groups of expanding plate members 46 corresponding to the filter bags of the bag filter 2 are hinged. Each group consists of two expanding plate members 46 distributed front and back and in an eight-shaped structure. The middle part of the expanding plate member 46 is in a rectangular groove structure, and a number of V-shaped plates 461 are fixedly installed at equal intervals along the length direction inside the rectangular groove of the expanding plate member 46.

[0059] See also Figure 3 , Figure 7 and Figure 8 A crank plate 462 is fixedly installed on the lower side of the expansion plate 46, and a cooperative support plate 463 is hinged between the crank plates 462 on each group of expansion plates 46 and the lower synchronous support plate 41, so that all the crank plates 462 are always arranged parallel to the synchronous support plate 41.

[0060] The expansion plate 46 arranged in an eight-shaped structure at the bag opening of the filter bag can expand the bag opening of the filter bag, thereby ensuring that the airflow can be blown smoothly through the bag opening to the inside of the filter bag, and through the coordinated support plate 463, the crank plate 462 is always arranged parallel to the synchronous support plate 41, so that the expansion plate 46 and the synchronous support plate 41 deflect synchronously, and then the expansion plate 46 can always adapt to the deflection direction of the filter bag to expand its bag opening.

[0061] The opening of the V-shaped plate 461 faces the bottom of the filter bag. When a vortex is formed inside the airflow filter bag, the vortex drives the impurities to rotate inside the filter bag. When the impurities move toward the bag opening with the airflow, the opening of the V-shaped plate 461 blocks the impurities in the airflow and guides them to the side of the filter bag, so that the impurities are adsorbed on the side of the filter bag, thereby preventing the impurities from escaping from the filter bag.

[0062] It should be noted that, since the airflow blows into the interior of the filter bag through the bag opening of the filter bag, the vortex inside the filter bag drives the impurities to move closer to the side of the filter bag, so that the V-shaped plate 461 can block the impurities.

[0063] See also Figure 1-Figure 8 When purifying and filtering the airflow, the present invention also includes the following steps: In the first step, the bag filter 2 is slidably inserted into the air inlet position of the fan box 1, and the U-shaped frame 323 and the frame of the bag filter 2 are locked into a whole by screwing the fastening screws, and at the same time, the spring telescopic rod 326 pushes the limit plate 327 and the rotating rod 325 to rotate and connect together.

[0064] In the second step, the operator manually turns the adjusting screw 328 to drive the two outer scrapers 44 and the two rollers 43 to move to the front and rear sides of the corresponding filter bag. At the same time, the spiral spring pushes the rollers 43 to squeeze on the filter bag through its own elastic force, and the rollers 43 squeeze the corresponding positions of the filter bag together.

[0065] In the third step, the fan box 1 allows the air flow to pass through the filter bag of the bag filter 2 and flow into the interior of the fan box 1, and then reciprocates the telescopic section of the electric cylinder 321, so that the electric cylinder 321 drives the frame of the bag filter 2 to move back and forth to prevent the bag opening position of the filter bag from being fixed.

[0066] In the fourth step, the frame of the bag filter 2 drives the support frame 31 to reciprocate along the circumference of the rotating rod 325 through the synchronous support plate 41, so that the support frame 31 simultaneously drives the filter bag of the bag filter 2 to reciprocate, thereby making the filter bag of the bag filter 2 alternately filter against the wind through its two inner sides.

[0067] In the fifth step, when the filter bag deflects to one side, the support frame 31 drives the knocking hammer 333 to contact an inner side of the filter bag that is not facing the wind through the swing plate 336. At the same time, the airflow drives the knocking hammer 333 to vibrate and shake off the dust on the side of the filter bag that is not facing the wind through the blowing fan blades 334, thereby reducing the frequency of shutdown maintenance and improving the stability of air flow.

[0068] In the sixth step, when the synchronous support plate 41 starts to deflect, the two outer scrapers 44 push the inner scraper 45 to move across the filter bag, so that the inner scraper 45 scrapes the inner side of the filter bag, thereby increasing the collection effect of impurities in the filter bag.

[0069] In the seventh step, when the synchronous support plate 41 is reset and deflected, the damping telescopic rod 423 drives the two outer scrapers 44 to a position away from the synchronous support plate 41 and moves to the right to reset, so as to prevent the outer scrapers 44 from pushing impurities to the bag opening of the filter bag, and the roller 43 rolls on the filter bag, so that the roller 43 rolls over the impurities inside the filter bag and seals the impurities at the bottom of the filter bag to prevent the impurities from escaping.

[0070] In the eighth step, when the eddy current drives the impurities to move toward the bag opening, the opening of the V-shaped plate 461 blocks the impurities in the airflow and guides them to the side of the filter bag, so that the impurities are adsorbed on the side of the filter bag, thereby preventing the impurities from escaping from the filter bag.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A purification and filtering structure for a fan air inlet, comprising a fan box, a bag filter is slidably inserted inside the fan box, and is characterized in that: It also includes a swinging mechanism that alternately uses the inner side of the bag filter for filtration, and a dust collection mechanism that regularly cleans and aggregates dust and debris; The swinging mechanism includes a support skeleton in a U-shaped structure that is evenly distributed in the front-rear direction and rotatably arranged inside the bag filter, and a driving component that drives the bag filter to reciprocate back and forth and deflect, so that the support skeleton swings the filter bag of the bag filter back and forth, so as to alternately expose the two inner sides of the filter bag to the wind for filtration. A dust shaking component for vibrating the non-windward surface of the filter bag is arranged on the support skeleton; The dust collection mechanism includes two synchronous support plates fixedly installed on the upper and lower end faces of the support skeleton. Two rollers and two outer scrapers are arranged on the two synchronous support plates through a guiding component. The two rollers are located on the left of the two outer scrapers. The two rollers are used to always clamp the filter bag to prevent debris from escaping. The two outer scrapers move the aggregated debris by clamping the filter bag when moving leftward.

2. A purification and filtering structure for a fan air inlet according to claim 1, characterized in that: The driving component includes an electric cylinder fixedly installed on the inner upper side of the fan box. A guiding plate is fixedly installed on the end face of the telescopic section of the electric cylinder. A U-shaped frame is slidably arranged under the guiding plate. The U-shaped frame is locked with the frame of the bag filter as a whole through fastening screws.

3. The purification and filtering structure for the air inlet of a fan according to claim 2, characterized in that: A U-shaped plate is slidably arranged on the left side of two synchronous support plates at corresponding upper and lower positions. A rotating rod is slidably arranged on the two horizontal sections of the U-shaped plate. The upper and lower parts of the rotating rod are cylindrical. The inner upper side of the fan box is slidably connected with a limiting plate through a spring telescopic rod. Through holes are evenly arranged on the limiting plate in the front-rear direction. An adjusting screw threadedly connected with the vertical section of the U-shaped plate is rotatably connected to the rotating rod.

4. The purification and filtering structure for the air inlet of a fan according to claim 3, characterized in that: The guiding component includes two linkage support plates fixedly installed at the right end of the horizontal section of the U-shaped plate. The right sides of the two linkage support plates are slidably connected with the two outer scrapers back and forth. Two sliders arranged front and back are slidably arranged on the left side of the linkage support plate. A spiral spring is arranged between the slider and the linkage support plate. The upper and lower corresponding sliders are rotatably connected with the roller at the corresponding position.

5. The purification and filtering structure for the air inlet of a fan according to claim 4, characterized in that: A damping telescopic rod is fixedly installed on the upper side of the upper synchronous support plate. The left end of the damping telescopic rod is hinged with two connecting rod members through a connecting piece. The connecting rod member is hinged with the outer scraper at the corresponding position.

6. The purification and filtering structure for the air inlet of a fan according to claim 1, characterized in that: An inner scraper is slidably arranged on the support skeleton. A pushing spring is arranged between the inner scraper and the support skeleton. A notch matching the thickness of the inner scraper is arranged on the outer scraper. Triangular plates for pushing the outer scraper are fixedly installed on the front and rear sides of the upper synchronous support plate.

7. The purification and filtering structure for the air inlet of a fan according to claim 1, characterized in that: The dust shaking component includes a rotating tube rotatably arranged on the support skeleton through a yaw unit. A plurality of knocking hammers are arranged on the outer side of the middle part of the rotating tube. Two fan blades arranged up and down are fixedly installed on the outer side of the rotating tube.

8. The purification and filtering structure for the air inlet of a fan according to claim 7, characterized in that: The yaw unit includes fixed support plates that are symmetrically arranged up and down and fixedly installed on the frame of the bag filter. The left end of the fixed support plate is hinged with a swinging plate. A waist-shaped groove is arranged on the horizontal section of the support skeleton. The lower side of the swinging plate slides inside the waist-shaped groove through a convex column. The left ends of the upper and lower corresponding swinging plates are fixedly installed with a connecting round rod together. The rotating tube is rotatably sleeved on the outer side of the connecting round rod.

9. The purification and filtering structure for the air inlet of a fan according to claim 1, characterized in that: Several groups of expansion plates corresponding to the filter bags of the bag filter are hinged on the frame of the bag filter, each group is composed of two expansion plates distributed front and back and forming an eight-shaped structure, the middle part of the expansion plate is a rectangular groove structure, and several V-shaped plates are fixedly installed inside the rectangular groove of the expansion plate at equal intervals along its length direction.

10. A purification and filtering structure for a fan air inlet according to claim 9, characterized in that: A crank plate is fixedly mounted on the lower side of the expansion plate, and a coordinated support plate is hinged between the crank plate on each group of expansion plates and the lower synchronous support plate, so that all crank plates are always arranged in parallel with the synchronous support plate.

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