A purification and filtration structure for the air inlet of a fan

Abstract

The present invention relates to the technical field of fan filtration, specifically a purification and filtration structure for the air inlet of a fan, including a fan box, a bag filter is slidably inserted inside the fan box, and further 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 sundries. The present invention uses the cooperation of a support skeleton and a driving component to cause the filter bag of the bag filter to reciprocally deflect, so that the two inner sides of the filter bag alternately face the wind for filtration, breaking through the limitation that the traditional filter bag always faces the wind with a fixed surface. The present invention uses the linkage of an outer scraper and a rotating roller through a guiding component to clamp and move the filter bag to the left during the swinging process of the filter bag, aggregating the dust and sundries accumulated in the bag to a specific area to avoid disorderly diffusion, and combined with an inner scraper, it can scrape the inner side of the filter bag to further strengthen the scraping and gathering effect of sundries.

Description

Technical Field

[0001] The invention relates to the technical field of fan filtering, and in particular to a purification filtering structure for an air inlet of a fan. Background Art

[0002] Existing fan systems usually consist of a fan box, an air supply fan and a bag filter. The fan box serves as the main structure, and is equipped with an air supply fan inside to drive the airflow. The bag filter is fixed at the air inlet position of the fan box by sliding and plugging. It is used to intercept impurities such as dust and particulate matter in the air, protect the internal components of the fan from pollution, 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 distributed at equal intervals 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 impurities in the airflow on their inner side surfaces. A frame is provided on the frame to hold the filter bags open so that the airflow can be blown smoothly into the filter bags.

[0004] However, since the existing frame is fixed, the filter bag always filters at a fixed position on the inner side facing the wind. After long-term use, the windward side is easily blocked due to the accumulation of impurities, resulting in a significant decrease in air flow. Frequent shutdowns are required to clean or replace the filter bags, which makes it impossible to fully utilize the filter bags. In addition, the traditional structure lacks an active collection and cleaning mechanism for debris in the bag. Dust is easily accumulated disorderly inside the filter bag, which not only accelerates blockage but also increases filtration resistance.

[0005] In response to these problems, there is an urgent need for a purification and filtration structure that can dynamically switch the filter surface and automatically collect dust, so as to improve the filtration efficiency and reduce maintenance costs. Summary of the invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a purification and filtering structure for the air inlet of a fan, including a fan box, a bag filter is slidably inserted inside the fan box, and also includes a swing mechanism for alternately using the inner side of the bag filter for filtering, and a dust collection mechanism for regularly cleaning and collecting dust and debris.

[0007] The swing mechanism includes a support frame with a 匚-shaped structure which is evenly distributed along the front-to-back direction and rotatably arranged inside the bag filter, and a driving component which drives the bag filter to move back and forth and deflect, so that the support frame reciprocates and swings the filter bag of the bag filter so that the two inner sides of the filter bag alternately face the wind for filtering, and a dust shaking component is arranged on the support frame to vibrate the non-windward side of the filter bag.

[0008] The dust collection mechanism includes two synchronous support plates fixedly installed on the upper and lower end faces of the support skeleton. Two rotating rollers and two outer scraping plates are arranged on the two synchronous support plates through a guiding assembly. The two rotating rollers are located on the left side of the two outer scraping plates. The two rotating rollers are used to always clamp the filter bag to prevent sundries from escaping. The two outer scraping plates 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 upper side inside 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 into 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. A limiting plate is slidably connected to the upper side inside the fan box through a spring telescopic rod. Through holes are equidistantly arranged on the limiting plate along the front-back direction. An adjusting screw threadedly connected to 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 two outer scraping plates are slidably connected to the right sides of the two linkage support plates. 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 to the rotating roller at the corresponding position.

[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 link members through a connecting piece. The link member is hinged with the outer scraping plate at the corresponding position.

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

[0014] Preferably, the dust shaking assembly 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.

[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 to 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 tube is rotatably sleeved on the outer side of the connecting round rod.

[0016] Preferably, a plurality of groups of expanding plate members corresponding one by one to the filter bags of the bag filter are hinged on the frame of the bag filter. Each group consists of two expanding plate members distributed front and back and having a V-shaped structure. The middle part of the expanding plate member has a rectangular groove structure, and a plurality of V-shaped plates are fixedly installed at equal intervals along the length direction inside the rectangular groove of the expanding plate member.

[0017] Preferably, a crank plate is fixedly installed on the lower side of the expanding plate member. A cooperative support plate is jointly hinged between the crank plates on each group of expanding plate members and the lower synchronous support plate, so that all the crank plates are always arranged parallel to the synchronous support plate.

[0018] The beneficial effects of the present invention are as follows: First, the present invention uses the cooperation of the support skeleton and the drive assembly to enable the filter bag of the bag filter to reciprocally deflect, so that the two inner sides of the filter bag alternately face the wind for filtration, breaking through the limitation that the traditional filter bag always faces the wind with a fixed surface. While making full use of the two inner sides of the filter bag, the periodic vibration of the dust shaking assembly on the non-wind-facing surface of the filter bag 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 the air flow rate.

[0019] Second, the present invention uses the linkage of the outer scraper and the rotating roller through the guiding assembly to clamp and move the filter bag leftward during the swinging process of the filter bag, gathering the dust and sundries accumulated in the bag to a specific area to avoid disorderly diffusion. Combined with the inner scraper, it can scrape the inner side of the filter bag, further strengthening the effect of scraping and gathering sundries. 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 the operation continuity.

[0020] Third, the present invention uses the linkage of the expanding plate member and the support skeleton through the cooperative support plate to enable the expanding plate member and the synchronous support plate to swing synchronously. Through the support of the expanding plate member, the bag mouth of the filter bag can be kept open all the time, ensuring the smooth flow of air to the inside of the filter bag. At the same time, the V-shaped plates on the expanding plate member can block and capture the impurities escaping due to the eddy current effect inside the bag, and directly guide these impurities to the side of the filter bag, increasing the effect of scraping and gathering sundries.

[0021] Fourth, the electric cylinder in the drive assembly of the present invention can not only drive the filter bag to swing reciprocally, but also drive the bag mouth position of the filter bag to reciprocally move by reciprocally moving the frame, preventing the bag mouth position of the filter bag from remaining fixed all the time, thereby ensuring the uniformity of impurity filtration for each filter bag, making full use of each filter bag, further reducing the frequency of shutdown maintenance, and improving the operation continuity. 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 sectional view of the present invention.

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

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

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

[0027] Figure 5 is the partial structural schematic diagram of the bag filter, ash 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 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. Drive assembly; 33. Ash shaking assembly; 41. Synchronous support plate; 42. Guide assembly; 43. Rotating 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. Knocking 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 Embodiment

[0032] The embodiments of the present invention will be described in detail below. The embodiments described below 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 technologies or conditions not specified in the embodiments, they shall be carried out according to the technologies or conditions described in the literature in the field or according to the product description.

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

[0034] When the bag filter 2 is working, the swinging mechanism 3 can drive the frame of the bag filter 2 to move back and forth, so as to avoid the bag mouth position of the filter bag remaining fixed all the time, ensure the uniformity of impurity filtration for each filter bag, and 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 sides of the filter bag alternately face the wind for filtration, thus making full use of the two inner sides of the filter bag for filtration.

[0035] At the same time, the dust collection mechanism 4 can also cooperate with the swinging mechanism 3 to gather the dust and sundries accumulated in the bag to the bottom of the filter bag, avoid the disorderly diffusion of impurities, reduce the filtration resistance of the filter bag, and also reduce 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 swinging 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 make the support frame 31 swing the filter bag of the bag filter 2 back and forth, so that the two inner sides of the filter bag 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 inside the fan box 1, a guide plate 322 is fixedly installed on the end face 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, and 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 arranged on the two synchronous support plates 41 through a guiding assembly 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, and the two outer scraping plates 44 scrape and gather sundries by clamping the filter bag when moving leftward.

[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 inner upper side of the fan 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-back 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 fan 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, and 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 fan box 1 starts to work, a negative pressure is formed inside the fan 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 fan 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. The support skeleton 31 simultaneously drives the filter bag of the bag filter 2 to deflect reciprocally, and further enables the filter bag of the bag filter 2 to filter against the wind alternately through its two inner sides at the front and back, 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 , 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 , 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. 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 one inner side of the filter bag that is not facing the wind through the connecting round rod 337. At the same time, the airflow 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 FIGS.

[0049] When the synchronous support plate 41 is not deflected, that is, when the synchronous support plate 41 is perpendicular to 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 C-shaped plate 324. At this time, the operator manually rotates the adjusting screw 328 in advance to drive the C-shaped plate 324 to move to the right relative to the rotating rod 325, so that the C-shaped plate 324 drives the two outer scraping plates 44 and the two rollers 43 to move to the front and back sides of the corresponding filter bag through the linkage support plate 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 press on the filter bag, and the roller 43 presses the corresponding position of the filter bag against each other, thereby closing the bottom position of the filter bag and preventing the impurities concentrated at the bottom of the bag from escaping.

[0050] In this embodiment, by rotating the adjusting screw 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 FIGS.

[0052] Refer to Figure 3 、 Figure 4 and Figure 5 As shown in FIGS.

[0053] When the synchronous support plate 41 is not deflected, the outer scraper 44 is located at the right part of the inner scraper 45, and the outer scraper 44 is located at the right part of the triangular plate 451. When the synchronous support plate 41 begins to deflect, the synchronous support plate 41 gradually moves away from the vertical section of the 匚-shaped plate 324, so that the linkage support plate 421 moves to the left relative to the synchronous support plate 41, thereby making the linkage support plate 421 drive the two outer scrapers 44 and the two rollers 43 to move synchronously to the left 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 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 through the reaction force of the connecting rod 424 to squeeze the filter bag, thereby causing the two outer scrapers 44 to push the filter bag.

[0055] When the two outer scrapers 44 move to the position of the inner scraper 45, the outer scrapers 44 push the inner scraper 45 to move synchronously through 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. When the synchronous support plate 41 is reset and deflected in 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 a position away from the synchronous support plate 41 and move to the right to reset by pushing the connecting rod 424, so as to prevent the outer scrapers 44 from pushing the impurities to the bag mouth of the filter bag.

[0056] After the two outer scrapers 44 move away from each other, the push spring pushes the inner scraper 45 to move rightward and reset by 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 support frame 31 at the corresponding position, so that when the operator manually turns 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, thereby facilitating the quick disassembly and replacement of the filter bag.

[0058] See also Figure 3 and Figure 7 Several groups of expansion plates 46 corresponding to the filter bags of the bag filter 2 are hinged on the frame of the bag filter 2, and each group is composed of two expansion plates 46 distributed front and back and in an eight-shaped structure. The middle part of the expansion plate 46 is a rectangular groove structure, and several V-shaped plates 461 are fixedly installed at equal intervals inside the rectangular groove of the expansion plate 46 along its length direction.

[0059] Refer to Figure 3 、 Figure 7 and Figure 8 On the lower side of the expansion support plate member 46, a crank plate 462 is fixedly installed. A cooperation support plate 463 is jointly hinged between the crank plates 462 on each group of expansion support plate members 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 support plate members 46 arranged in a V-shaped structure at the bag mouth position of the filter bag can expand the bag mouth of the filter bag, so as to ensure that the air flow can smoothly blow into the interior of the filter bag through the bag mouth. And through the cooperation support plate 463, the crank plates 462 are always arranged parallel to the synchronous support plate 41, so that the expansion support plate members 46 and the synchronous support plate 41 deflect synchronously, and further the expansion support plate members 46 can always adapt to the deflection direction of the filter bag to expand its bag mouth.

[0061] The opening position of the V-shaped plate 461 faces the bottom position of the filter bag. When a vortex is formed inside the filter bag by the air flow, the vortex drives the impurities to rotate inside the filter bag. When the impurities move towards the bag mouth position along with the air flow, the opening of the V-shaped plate 461 blocks the impurities in the air flow and guides them to the side of the filter bag, so that the impurities are adsorbed on the side of the filter bag, and further prevents the impurities from escaping from the filter bag.

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

[0063] Refer to Figures 1 - 8 When the present invention purifies and filters the air flow, the following steps are further included: First step, the bag filter 2 is slidably inserted at the air inlet 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. At the same time, the spring telescopic rod 326 pushes the limiting plate 327 to be rotatably connected with the rotating rod member 325.

[0064] Second step, the operator manually rotates the adjusting screw rod 328 to drive the two outer scrapers 44 and the two rollers 43 to move to the front and back sides of the corresponding filter bag. At the same time, the spiral spring pushes the roller 43 against the filter bag by its own elastic force, and the roller 43 squeezes the corresponding positions of the filter bag against each other.

[0065] Third step, the fan box 1 makes the air flow pass through the filter bag of the bag filter 2 and flow into the interior of the fan box 1. Subsequently, 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, preventing the bag mouth position of the filter bag from remaining fixed all the time.

[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 airflow.

[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 the 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 within the scope of protection of the present invention.

Claims

1. A purification and filtration structure for the air inlet of a fan, comprising a fan box, and a bag filter is slidably inserted inside the fan box, characterized in that, It also includes a swing 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 sundries; The swing mechanism includes a support skeleton in a U-shaped structure that is evenly distributed in the front-back direction and rotatably arranged inside the bag filter, and a drive assembly 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 assembly 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 assembly. 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 sundries from escaping. The two outer scrapers move the aggregated sundries by clamping the filter bag when moving left.

2. The purification and filtration structure for the air inlet of a fan according to claim 1, characterized in that, The drive assembly includes an electric cylinder fixedly installed on the inner upper side of the fan box. A guide 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 guide plate. The U-shaped frame is locked with the frame of the bag filter into a whole through fastening screws.

3. The purification and filtration structure for the air inlet of a fan according to claim 2, wherein, 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. A limiting plate is slidably connected to the inner upper side of the fan box through a spring telescopic rod. Through holes are evenly opened in the limiting plate in the front-back direction. An adjusting screw threadedly connected to the vertical section of the U-shaped plate is rotatably connected to the rotating rod.

4. The purification and filtration structure for the air inlet of a fan according to claim 3, characterized in that, The guiding assembly 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 to 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 to the roller at the corresponding position.

5. The purification and filtration 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 filtration 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 opened 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.

7. A purification and filtration structure for the air inlet of a fan according to claim 1, characterized in that, The dust shaking assembly 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. A purification and filtration 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. A swing plate is hinged to the left end of the fixed support plate. A waist-shaped groove is opened 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 tube is rotatably sleeved on the outer side of the connecting round rod.

9. The purification and filtration structure for the air inlet of a fan according to claim 1, characterized in that, A number of groups of expanding and supporting plate members corresponding one by one to the filter bags of the bag filter are hinged on the frame of the bag filter. Each group consists of two expanding and supporting plate members distributed front and back and in a V-shaped structure. The middle of the expanding and supporting plate member is in a rectangular groove structure, and a number of V-shaped plates are fixedly installed at equal intervals along the length direction inside the rectangular groove of the expanding and supporting plate member.

10. A purification and filtration structure for the air inlet of a fan according to claim 9, characterized in that, A crank plate is fixedly installed on the lower side of the expanding and supporting plate member. A cooperative support plate is jointly hinged between the crank plates on each group of expanding and supporting plate members and the lower synchronous support plate, so that all the crank plates are always arranged parallel to the synchronous support plate.

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