Indoor dust filtering device for safety engineering

Abstract

The invention relates to the technical field of dust filtering, in particular to an indoor dust filtering device for safety engineering, which comprises a filtering barrel, an air inlet pipe is mounted at the upper end of the outer side wall of the filtering barrel, an air outlet pipe is mounted at the lower end of the outer side wall of the filtering barrel, a positioning cylinder is movably connected to the upper end of the filtering barrel, and a hollow column is fixedly connected to the lower end of the positioning cylinder. A hollow column is arranged in the positioning barrel, the hollow column extends into a cavity of the filtering barrel, a filtering structure is installed on the outer side wall of the hollow column, a soft connection structure is arranged in the positioning barrel, and the soft connection structure can judge whether the balance weight of the filtering structure is too heavy or not. Meanwhile, when the filter plate is cleaned, the bumping frequency of the filter plate is increased through the gravity of the filter plate, the interval of rotating speed switching of the filter plate is increased, the cleaning effect on the filter plate is improved, then through a scraping structure, the upper surface of the dust falling plate is scraped, and meanwhile dust is prevented from flowing backwards.

Description

Technical Field

[0001] The present invention relates to the technical field of dust filtration, and specifically to an indoor dust filtration device for safety engineering. Background Art

[0002] With the acceleration of the industrialization process and the improvement of safety production requirements, the problem of dust pollution has become increasingly prominent in the field of safety engineering. Dust not only poses a serious threat to the health of workers, but may also trigger major safety accidents such as explosions and fires. Especially in high-concentration combustible dust environments, such as coal mines, metal processing, and grain processing, the risk of dust explosion increases significantly. Therefore, developing efficient, safe, and reliable indoor dust filtration devices has become an urgent need in the field of safety engineering.

[0003] An indoor decoration dust isolation device with the publication number CN 114472437 A includes a main body. A dust suction mechanism is provided on the lower surface of the main body. The dust suction mechanism includes a motor, a fan blade, a first rotating rod, a filter plate, a first gear, a second gear, a second rotating rod, an incomplete gear, a hollow rod, a third gear, a suction air pipe, a suction air hood, a sliding plate, a spring, a first tooth groove, a slide rail, a scraper, and a second tooth groove. A motor is fixedly connected to the lower surface of the main body. The circumferential surface of the output shaft of the motor is fixedly connected with a fan blade. The output end of the motor is fixedly connected with a first rotating rod. One end of the first rotating rod is fixedly connected with a first gear. The inner upper surface of the main body is rotatably connected with a second rotating rod. One end of the second rotating rod is fixedly connected with an incomplete gear. The present invention can make the suction air hood move reciprocally to expand the suction range to accelerate the absorption of dust, and can clean the filter plate to prevent impurities from blocking the filter plate.

[0004] However, when the above patent filters dust, the filter screen cannot judge whether it is blocked by itself, or there is too much dust attached to a local area of the filter plate, resulting in a deterioration of the filtering effect. At the same time, when the dust is evenly distributed on the outer surface of the filter plate and causes the filtering effect of the filter plate to deteriorate, the continuous blowing of dust will cause the pressure inside the container to increase, easily resulting in dust backflow or ejection through the slag discharge port. Summary of the Invention

[0005] The purpose of the invention is to provide an indoor dust filtration device for safety engineering to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An indoor dust filtration device for safety engineering includes a filtration barrel. An air inlet pipe is installed at the upper end of the outer side wall of the filtration barrel. An air outlet pipe is installed at the lower end of the outer side wall of the filtration barrel. The upper end of the filtration barrel is movably connected with a positioning barrel. A hollow column is fixedly connected to the lower end of the positioning barrel, and the hollow column extends into the cavity of the filtration barrel. A filtration structure is installed on the outer side wall of the hollow column.

[0007] The interior of the positioning cylinder is provided with a flexible connection structure, which can judge whether the counterweight of the filtering structure is too heavy. A pulley is fixedly connected to the upper end of the flexible connection structure, and a bottom plate is fixedly connected to the upper end of the filtering cylinder. A speed-changing structure is installed on the upper end of the bottom plate, and a transmission belt is connected between the speed-changing structure and the pulley. The speed-changing structure can change the rotation speed of the pulley by changing its own diameter. A sliding rod is installed at the lower end of the speed-changing structure, and a climbing structure is installed on the outer side wall of the sliding rod, which can drive the sliding rod to slide up and down, so as to push the speed-changing structure to expand its diameter;

[0008] The lower end of the hollow column is fixedly connected with a sliding cylinder, the outer side wall of the sliding cylinder is slidably connected with a sliding ring, the outer side wall of the sliding ring is slidably connected with a central cylinder, the outer side wall of the central cylinder is fixedly connected with an ash-dropping plate, and a plurality of ash-discharging grooves are arranged in an array along the center of the ash-dropping plate on the upper surface of the ash-dropping plate. An elastic scraping structure is arranged at the upper end of the sliding ring, which can scrape the upper surface of the ash-dropping plate, and the elastic scraping structure can block the ash-discharging grooves. An arc-shaped connecting plate is installed on the outer side wall of the ash-dropping plate, and the arc-shaped connecting plate is fixedly connected with the sliding rod. Two spring sixes are symmetrically installed at the lower end of the arc-shaped connecting plate.

[0009] Preferably, the filtering structure includes a plurality of rotating plates, which are fixedly connected to the outer side wall of the hollow column at equal intervals. A filter plate is installed on one side of each rotating plate, and the lower end of the sliding cylinder is slidably connected with the upper notch of the air outlet pipe.

[0010] Preferably, the flexible connection structure includes a central rod, the upper end of the central rod is fixedly connected with the pulley, the lower end of the central rod is movably connected with the inner cavity bottom of the positioning cylinder. Two L-shaped sliding grooves are symmetrically arranged on the outer side wall of the positioning cylinder, and the inner wall of each L-shaped sliding groove is slidably connected with a slider, and the slider is fixedly connected with the central rod. A spring one is fixedly connected to the inner cavity bottom of the positioning cylinder, the upper end of the spring one is connected with the two sliders together, and the spring one is sleeved on the outer side wall of the central rod.

[0011] Preferably, the speed-changing structure includes a connecting cylinder, the connecting cylinder is rotatably connected to the upper end of the bottom plate, a driving wheel is fixedly connected to the upper end of the connecting cylinder, a plurality of expansion blocks are slidably connected to the outer side wall of the driving wheel, the inner wall of the driving wheel is movably connected with the sliding rod, the upper end of the sliding rod is fixedly connected with a tapered head column, and the outer side walls of the sliding rod and the tapered head column can both abut against one end of the expansion block.

[0012] Preferably, the climbing structure includes a connecting plate, the connecting plate is fixedly connected to the outer side wall of the filtering cylinder, a rack is slidably connected to one side of the connecting plate close to the sliding rod, an L-shaped connecting plate is sleeved on the outer side wall of the sliding rod, and the L-shaped connecting plate is slidably connected with the connecting plate. A bevel gear one is fixedly connected to the outer side wall of the L-shaped connecting plate, a bevel gear two meshing with the bevel gear one is rotatably connected to the inner side wall of the L-shaped connecting plate, and a driving gear is rotatably connected to one side of the L-shaped connecting plate far away from the bevel gear two, and the driving gear is fixedly connected with the bevel gear two.

[0013] Preferably, a bevel block is slidably connected to the inner wall of the connecting plate up and down, and the bevel block is slidably abutted against the back surface of the rack. A third spring is fixedly connected to the lower end of the bevel block. A resisting strip is fixedly connected to one side of the bevel block close to the sliding rod, and the upper surface of the resisting strip can be abutted against the L-shaped connecting plate.

[0014] Preferably, the elastic scraping structure includes a fifth spring. The fifth spring is fixedly connected to the upper end of the sliding ring. A circular ring is fixedly connected to the upper end of the fifth spring. A plurality of scraping plates are fixedly connected to the outer side wall of the circular ring at equal intervals, and the scraping plates can be embedded into the cavities of the corresponding ash discharge grooves. A plurality of vertical grooves are formed in the outer side wall of the sliding ring. A plurality of inclined arc grooves are also formed in the outer side wall of the sliding ring, and each inclined arc groove communicates with the vertical groove at the corresponding position. A plurality of embedding columns are fixedly connected to the inner wall of the central cylinder, and the embedding columns are slidably connected with the vertical grooves and the inclined arc grooves at the corresponding positions. A limiting ring is fixedly connected to the outer side wall of the sliding cylinder, and the limiting ring can be abutted against the upper end of the circular ring.

[0015] Preferably, a bottom ring is fixedly connected to the lower end of the sliding ring. A fourth spring sleeved on the outer side wall of the sliding ring is fixedly connected to the upper end of the bottom ring, and the fourth spring abuts against the lower end of the central cylinder. Two pushing plates are symmetrically fixedly connected to the outer side wall of the bottom ring. Two limiting blocks are symmetrically fixedly connected to the inner side wall of the filter barrel, and each limiting block can be abutted against the pushing plate at the corresponding position.

[0016] Preferably, a driving motor is installed on the upper end of the bottom plate. A transmission wheel is fixedly connected to the output end of the driving motor. A driving belt is sleeved between the transmission wheel and the connecting cylinder. Two sealing shells are symmetrically installed on the outer side wall of the filter barrel, and the sealing shells are slidably connected with the arc-shaped connecting plates. Two sealing plates are symmetrically installed at the upper and lower ends of the arc-shaped connecting plates, and each sealing plate is slidably connected with the side surface of the sealing shell. A limiting frame is fixedly connected to the upper surface of the filter barrel. A tensioning rod is slidably connected to the inner side wall of the limiting frame, and the tensioning rod abuts against the inner side wall of the transmission belt. A second spring is fixedly connected to the inner side wall of the limiting frame.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By regularly changing the rotational speed of the pulley through a speed-changing structure, when there is too much dust on the surface of the filter plate and the rotational inertia of the filter plate is large, it will cause the flexible connection structure to push the positioning cylinder downward. At the same time, the filter plate and the hollow column will also slide downward. During the rotation of the sliding rod, the sliding rod will be slightly lifted and lowered through the driving gear. The up and down movement of the sliding rod will drive the ash-dropping plate to lift and lower, and the ash-dropping plate will drive the filter plate to produce a bumping effect, promoting the cleaning effect of the filter plate. At the same time, the amplitude of the up and down movement of the sliding rod becomes smaller, making the frequency of the speed change of the speed-changing structure faster, so that the rotational speed of the filter plate changes greatly and the filter plate shakes off its own dust. At the same time, when the ash-dropping plate slides downward, the elastic scraping structure can make the scraper clean the ash on the upper surface of the ash-dropping plate, and when the ash-dropping plate slides upward, the ash discharge groove is blocked again to prevent the backflow of dust. Finally, through the upward reset speed of the ash-dropping plate, it is convenient for the staff to judge whether the pressure inside the filter barrel is too large. If it is large, the filter plate will be cleaned in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below with reference to the drawings and embodiments:

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

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention removing the filter barrel;

[0022] Figure 3 It is a schematic diagram of the overall structure of the present invention from another angle;

[0023] Figure 4 It is an exploded view of the structure of the expansion block of the present invention;

[0024] Figure 5 It is a sectional view of the whole of the present invention;

[0025] Figure 6 It is a schematic diagram of the partial structure of the positioning barrel of the present invention;

[0026] Figure 7 For the present invention Figure 3 Partial enlarged view of A in;

[0027] Figure 8 It is a schematic diagram of the sectional structure of the connecting plate of the present invention;

[0028] Figure 9 For the present invention Figure 8 Partial enlarged view of B in;

[0029] Figure 10 It is an exploded view of the structure of the ash-dropping plate and the scraper of the present invention;

[0030] Figure 11 For the present invention Figure 5 Partial enlarged view at position C in

[0031] Figure 12 For the present invention Figure 5 Partial enlarged view at position D in

[0032] Figure 13 For the present invention Figure 1 Partial enlarged view at position E in

[0033] Figure 14 Schematic diagram of the partial structure of the scraper of the present invention.

[0034] Explanation of reference numerals:

[0035] 1. Filter barrel; 2. Air inlet pipe; 3. Air outlet pipe; 4. Hollow column; 5. Rotating plate; 6. Filter plate; 7. Positioning cylinder; 8. L-shaped chute; 9. Slide block; 10. First spring; 11. Pulley; 12. Transmission belt; 13. Limit frame; 14. Tightening rod; 15. Second spring; 16. Driving wheel; 17. Expansion block; 18. Connecting cylinder; 19. Slide rod; 20. Tapered head column; 21. L-shaped connecting plate; 22. First bevel gear; 23. Second bevel gear; 24. Driving gear; 25. Connecting plate; 26. Rack; 27. Hypotenuse block; 28. Third spring; 29. Contact strip; 30. Arc-shaped connecting plate; 31. Ash falling plate; 32. Ash discharge groove; 33. Central cylinder; 34. Embedded column; 35. Slide cylinder; 36. Bottom ring; 37. Pushing plate; 38. Limit block; 39. Fourth spring; 40. Scraper; 401. Ring; 41. Vertical groove; 42. Oblique arc groove; 43. Limit ring; 44. Fifth spring; 45. Central rod; 46. Slide ring; 47. Sixth spring; 48. Ash bin; 49. Sealing shell; 50. Sealing plate; 51. Bottom plate; 52. Driving motor. Detailed implementation manners

[0036] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 - 14, the present invention provides a technical solution: an indoor dust filtering device for safety engineering, including a filtering barrel 1. An air inlet pipe 2 is installed at the upper end of the outer side wall of the filtering barrel 1, and an air outlet pipe 3 is installed at the lower end of the outer side wall of the filtering barrel 1. The upper end of the filtering barrel 1 is movably connected to a positioning cylinder 7. A hollow column 4 is fixedly connected to the lower end of the positioning cylinder 7, and the hollow column 4 extends into the cavity of the filtering barrel 1. A filtering structure is installed on the outer side wall of the hollow column 4. Among them, a dust bin 48 is slidably connected to the side wall at the lower end of the filtering barrel 1, which can store dust;

[0038] A flexible connection structure is arranged inside the positioning cylinder 7. The flexible connection structure can judge whether the weight of the filtering structure is too heavy. A pulley 11 is fixedly connected to the upper end of the flexible connection structure. A bottom plate 51 is fixedly connected to the upper end of the filtering barrel 1. A speed-changing structure is installed on the upper end of the bottom plate 51. A transmission belt 12 is connected between the speed-changing structure and the pulley 11. The speed-changing structure can change the rotation speed of the pulley 11 by changing its own diameter. A sliding rod 19 is installed at the lower end of the speed-changing structure. A climbing structure is installed on the outer side wall of the sliding rod 19, which can drive the sliding rod 19 to slide up and down, so as to push the speed-changing structure to expand its diameter;

[0039] A sliding cylinder 35 is fixedly connected to the lower end of the hollow column 4. A sliding ring 46 is slidably connected to the outer side wall of the sliding cylinder 35. A central cylinder 33 is slidably connected to the outer side wall of the sliding ring 46. A dust-falling plate 31 is fixedly connected to the outer side wall of the central cylinder 33. A plurality of dust-discharging grooves 32 are arranged in an array along the center of the upper surface of the dust-falling plate 31. An elastic scraping structure is arranged at the upper end of the sliding ring 46, which can scrape the upper surface of the dust-falling plate 31, and the elastic scraping structure can block the dust-discharging grooves 32. An arc-shaped connecting plate 30 is installed on the outer side wall of the dust-falling plate 31, and the arc-shaped connecting plate 30 is fixedly connected to the sliding rod 19.

[0040] Among them, the filtering structure includes a plurality of rotating plates 5. The rotating plates 5 are fixedly connected to the outer side wall of the hollow column 4 at equal intervals. A filter plate 6 is installed on one side of each rotating plate 5. The lower end of the sliding cylinder 35 is slidably connected to the upper slot of the air outlet pipe 3.

[0041] Specifically, the gas with dust enters the inside of the filtering barrel 1 through the air inlet pipe 2. Then the hollow column 4 and the rotating plate 5 rotate, so as to improve the fluidity of the dust gas inside the filtering barrel 1, make the contact between the filter plate 6 and the dust gas more uniform. Then the dust will be filtered on the outer surface of the filter plate 6. At the same time, the filtered gas will flow into the inside of the hollow column 4, and then flow from the hollow column 4 into the inside of the air outlet pipe 3. The air outlet pipe 3 can be connected to an air suction pump to extract the filtered gas. At the same time, if it is necessary to backwash the filter plate 6, it is necessary to contact the air suction pump in the reverse direction through the air outlet pipe 3, so as to discharge air in the reverse direction through the air outlet pipe 3, and blow the dust on the surface of the filter plate 6 through the reverse airflow.

[0042] Among them, the soft connection structure includes a center rod 45, the upper end of the center rod 45 is fixedly connected to the pulley 11, the lower end of the center rod 45 is movably connected to the inner cavity bottom of the positioning cylinder 7, and the outer wall of the positioning cylinder 7 is symmetrically provided with two L-shaped slide grooves 8, and the inner wall of each L-shaped slide groove 8 is slidably connected with a slider 9, and the slider 9 is fixedly connected to the center rod 45, and the inner cavity bottom of the positioning cylinder 7 is fixedly connected with a spring 10, the upper end of the spring 10 is connected to the two sliders 9, and the spring 10 is sleeved on the outer wall of the center rod 45.

[0043] Specifically, the spring 10 is in a compressed state, storing elastic potential energy, referring to Figure 6 The notch of the L-shaped chute 8 is divided into a horizontal groove and a vertical groove. When the pulley 11 rotates counterclockwise, the center rod 45 will also rotate therewith. When the center rod 45 rotates, it will drive the slider 9 to rotate around the center rod 45 inside the L-shaped chute 8. However, when the slider 9 rotates, it will be resisted by the spring 10, so that the slider 9 will push the spring 10 to rotate together, and the spring 10 will push the positioning cylinder 7 and the hollow column 4 to rotate together. At the same time, the speed change structure makes the pulley 11 suddenly slow down during the rotation process. When too much dust is attached to the surface of the filter plate 6, the weight of the filter plate 6 is increased. At this time, if the pulley 11 The rotation of the pulley 11 suddenly slows down. At this time, the hollow column 4 is increased by the weight of the filter plate 6, and the inertia of the rotation of the filter plate 6 will increase. At this time, when the rotation of the center rod 45 slows down, the rotation speed of the hollow column 4 will not suddenly slow down, so that the slider 9 moves in the direction of the vertical groove of the L-shaped slide groove 8. When the slider 9 slides to the position of the vertical groove of the L-shaped slide groove 8, the spring 10 will release the elastic restoring force, thereby pushing the positioning cylinder 7 to descend. When the positioning cylinder 7 descends, the hollow column 4, the rotating plate 5 and the filter plate 6 inside the filter barrel 1 will also descend. At the same time, the hollow column 4 will also push the ash falling plate 31 to descend, and the spring 6 47 will be compressed.

[0044] Among them, the speed change structure includes a connecting cylinder 18, which is rotatably connected to the upper end of the base plate 51, and the upper end of the connecting cylinder 18 is fixedly connected to a driving wheel 16, and the outer wall of the driving wheel 16 is slidably connected to a plurality of expansion blocks 17, and the inner wall of the driving wheel 16 is movably connected to a sliding rod 19, and the upper end of the sliding rod 19 is fixedly connected to a cone head column 20, and the outer walls of the sliding rod 19 and the cone head column 20 can both contact with one end of the expansion block 17.

[0045] Among them, the climbing structure includes a connecting plate 25, which is fixedly connected to the outer side wall of the filter barrel 1. A rack 26 is slidably connected to one side of the connecting plate 25 close to the sliding rod 19. An L-shaped connecting plate 21 is sleeved on the outer side wall of the sliding rod 19, and the L-shaped connecting plate 21 is slidably connected to the connecting plate 25. A first bevel gear 22 is fixedly connected to the outer side wall of the L-shaped connecting plate 21. A second bevel gear 23 meshing with the first bevel gear 22 is rotatably connected to the inner side wall of the L-shaped connecting plate 21. A driving gear 24 is rotatably connected to one side of the L-shaped connecting plate 21 away from the second bevel gear 23, and the driving gear 24 is fixedly connected to the second bevel gear 23.

[0046] Among them, a bevel-edge block 27 is slidably connected up and down on the inner wall of the connecting plate 25, and the bevel-edge block 27 is slidably abutted against the back surface of the rack 26. A third spring 28 is fixedly connected to the lower end of the bevel-edge block 27. A contact bar 29 is fixedly connected to one side of the bevel-edge block 27 close to the sliding rod 19, and the upper surface of the contact bar 29 can be abutted against the L-shaped connecting plate 21.

[0047] Specifically, when the connecting cylinder 18 rotates, it will drive the sliding rod 19 and the conical head column 20 to rotate together. When the sliding rod 19 rotates, the first bevel gear 22 will also rotate accordingly. The rotation of the first bevel gear 22 drives the L-shaped connecting plate 21 and the driving gear 24 to rotate. Through the meshing of the driving gear 24 with the rack 26, the driving gear 24 will move downward while rotating. When the driving gear 24 moves, it will drive the conical head column 20 and the sliding rod 19 to slide downward together. When the conical head column 20 slides into the cavity of the driving wheel 16, the expansion block 17 will be abutted by the bevel edge, causing the expansion block 17 to slide away from the sliding rod 19, so that the diameter of the quasi-circle formed by the expansion block 17 becomes larger. When the driving wheel 16 rotates one circle, the transmission belt 12 will move a longer distance, so that the rotational speed of the pulley 11 becomes faster. As the sliding rod 19 gradually descends, the L-shaped connecting plate 21 will come into contact with the contact bar 29. When the contact bar 29 is pushed downward by the L-shaped connecting plate 21 and slides downward, refer to Figure 9When the rack 26 is in mesh with the driving gear 24, the rack 26 will no longer have a good supporting force on the meshing of the driving gear 24, so that the driving gear 24 will be pushed by the driving gear 24 to slide slightly in the direction of the filter barrel 1, and the driving gear 24 will also be disengaged from the rack 26, and finally the driving gear 24 will lose its supporting point and be reset to its original position by the elastic restoring force of the spring six 47. When the filter plate 6 falls to the top of the dust falling plate 31 together with the hollow column 4 due to excessive accumulation of filtered dust, the distance that the spring six 47 can give elastic recovery will be shortened, so that the sliding rod 19 rises and falls to change the speed of the pulley 11 more frequently, so that the filter plate 6 can rotate to a certain extent to shake off its own dust, and the dust falling plate 31 When the filter plate 6 is cleaned, the sliding rod 19 is pulled up and down, which will also push the filter plate 6 to shake up and down, and the frequency of the up and down shaking becomes higher, thereby promoting the cleaning effect of the filter plate 6. At the same time, if the dust attached to the surface of the filter plate 6 is relatively uniform and affects the filtering effect, the internal pressure of the space between the upper end of the ash falling plate 31 and the filter barrel 1 will increase. At this time, the staff can quickly judge whether the filtering effect of the filter plate 6 has deteriorated through the elastic recovery speed of the ash falling plate 31 by the spring six 47, so as to start the backwashing of the filter plate 6 in advance. When the filter plate 6 is cleaned, the driving gear 24 is driven to move upward by the engagement with the rack 26 by the reverse rotation of the sliding rod 19, and the sliding rod 19 moves upward through the ash falling plate 31 to push the filter plate 6 to reset. When the slider 9 slides to the bottom of the inner cavity of the L-shaped slide groove 8 again, the slider 9 is moved horizontally through the elastic reset of the spring one 10, so that the positioning cylinder 7 cannot continue to descend.

[0048] Among them, the elastic scraping structure includes a spring 44, which is fixed to the upper end of the sliding ring 46. The upper end of the spring 44 is fixed with a circular ring 401. The outer wall of the circular ring 401 is equidistantly fixed with a plurality of scrapers 40, and the scrapers 40 can be embedded in the cavity of the corresponding ash discharge groove 32. The outer wall of the sliding ring 46 is provided with a plurality of vertical grooves 41. The outer wall of the sliding ring 46 is also provided with a plurality of oblique arc grooves 42, and each oblique arc groove 42 is connected to the vertical groove 41 at the corresponding position. The inner wall of the center tube 33 is fixed with a plurality of embedded columns 34, and the embedded columns 34 are slidably connected with the vertical grooves 41 and the oblique arc grooves 42 at the corresponding positions. The outer wall of the sliding tube 35 is fixed with a limiting ring 43, and the limiting ring 43 can conflict with the upper end of the circular ring 401.

[0049] Among them, the lower end of the sliding ring 46 is fixedly connected to the bottom ring 36. The upper end of the bottom ring 36 is fixedly connected to a fourth spring 39 sleeved on the outer side wall of the sliding ring 46, and the fourth spring 39 abuts against the lower end of the central cylinder 33. Two push plates 37 are symmetrically and fixedly connected to the outer side wall of the bottom ring 36. Two limiting blocks 38 are symmetrically and fixedly connected to the inner side wall of the filter barrel 1, and each limiting block 38 can abut against the corresponding push plate 37.

[0050] Specifically, referring to Figure 10 With Figure 11 , when the ash-dropping plate 31 is pushed to the bottom by the sliding rod 19, at this time the push plate 37 will abut against the limiting block 38 and be pushed to slide upward. During the sliding process of the push plate 37, the insertion post 34 will slide in the cavities of the vertical groove 41 and the inclined arc groove 42. The limiting ring 43 will first slide vertically in the cavity of the vertical groove 41, so that the scraping plate 40 is pushed out of the cavity of the ash discharge groove 32. Then, when the push plate 37 slides further upward, the insertion post 34 will slide inside the inclined arc groove 42. The circular arc track of the inclined arc groove 42 will drive the sliding ring 46 to rotate slightly and lift. However, at this time, the circular ring 401 is abutted by the limiting ring 43, so that the fifth spring 44 will be compressed, and the scraping plate 40 will still rotate slightly, so as to scrape the upper surface of the ash-dropping plate 31, push the ash on the upper surface of the ash-dropping plate 31 into the inside of the ash discharge groove 32, and finally fall into the inside of the ash bin 48. A vent hole is installed on the outer wall of the ash bin 48, and a filter screen is installed on the vent hole.

[0051] Among them, a driving motor 52 is installed at the upper end of the bottom plate 51. The output end of the driving motor 52 is fixedly connected to a transmission wheel. A driving belt is sleeved between the transmission wheel and the connecting cylinder 18, and the connecting cylinder 18 can be driven to rotate through the inclined arc groove 42. The connecting cylinder 18 then drives the belt pulley 11 to rotate. Two sealing shells 49 are symmetrically installed on the outer side wall of the filter barrel 1, and the sealing shell 49 is slidably connected to the arc-shaped connecting plate 30. Two sealing plates 50 are symmetrically installed at the upper and lower ends of the arc-shaped connecting plate 30, and each sealing plate 50 is slidably connected to the side surface of the sealing shell 49. A limiting frame 13 is fixedly connected to the upper surface of the filter barrel 1. A tensioning rod 14 is slidably connected to the inner side wall of the limiting frame 13, and the tensioning rod 14 abuts against the inner side wall of the transmission belt 12. A second spring 15 is fixedly connected to the inner side wall of the limiting frame 13.

[0052] Specifically, when the arc-shaped connecting plate 30 drives the ash-dropping plate 31 to slide up and down, the sealing plate 50 will also slide accordingly, and the slot where the arc-shaped connecting plate 30 slides is sealed by the sealing shell 49.

[0053] Working principle: The gas with dust is transported to the inside of the filter barrel 1 through the air inlet pipe 2. Then, the pulley 11 drives the filter plate 6 to rotate inside the filter barrel 1, improving the fluidity of the air flow inside the filter barrel 1. During the rotation of the hollow column 4, the speed-changing structure regularly changes the rotation speed of the pulley 11. When there is too much dust on the surface of the filter plate 6, resulting in a large rotational inertia of the filter plate 6, the flexible connection structure will push the positioning cylinder 7 to slide downward. At the same time, the filter plate 6 and the hollow column 4 also slide downward. At the same time, during the rotation of the sliding rod 19, the sliding rod 19 will be driven by the driving gear 24 to continuously lift and lower slightly. The up and down movement of the sliding rod 19 will drive the ash-dropping plate 31 to lift and lower. The ash-dropping plate 31 will then drive the filter plate 6 to produce a bumping effect, promoting the cleaning effect of the filter plate 6. At the same time, the amplitude of the up and down movement of the sliding rod 19 becomes smaller, causing the frequency of the speed change of the speed-changing structure to increase, so that the rotation speed of the filter plate 6 changes greatly, resulting in the effect of shaking off its own dust. At the same time, when the ash-dropping plate 31 slides downward, the elastic scraping structure can also make the scraper 40 clean the ash on the upper surface of the ash-dropping plate 31, and when the ash-dropping plate 31 slides upward, the ash discharge groove 32 is blocked again to prevent the backflow of dust. Finally, based on the upward reset speed of the ash-dropping plate 31, it is convenient for the staff to judge whether the pressure inside the filter barrel 1 is too high. If it is too high, the filter plate 6 is cleaned in advance.

[0054] The above is only a preferred specific implementation manner 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 by the protection scope of the present invention.

Claims

1. An indoor dust filtering device for safety engineering, comprising a filtering barrel (1), an air inlet pipe (2) is installed at the upper end of the outer side wall of the filtering barrel (1), and an air outlet pipe (3) is installed at the lower end of the outer side wall of the filtering barrel (1), and it is characterized in that: The upper end of the filter barrel (1) is movably connected with a positioning cylinder (7). The lower end of the positioning cylinder (7) is fixedly connected with a hollow column (4), and the hollow column (4) extends into the cavity of the filter barrel (1). A filtering structure is installed on the outer side wall of the hollow column (4); A flexible connection structure is arranged inside the positioning cylinder (7). The flexible connection structure can judge whether the weight of the filtering structure is too heavy. The upper end of the flexible connection structure is fixedly connected with a pulley (11). The upper end of the filter barrel (1) is fixedly connected with a bottom plate (51). A speed change structure is installed on the upper end of the bottom plate (51). A transmission belt (12) is connected between the speed change structure and the pulley (11). The speed change structure can change the rotation speed of the pulley (11) by changing its own diameter. A sliding rod (19) is installed at the lower end of the speed change structure. A climbing structure is installed on the outer side wall of the sliding rod (19), which can drive the sliding rod (19) to slide up and down, so as to push the speed change structure to expand its diameter; The lower end of the hollow column (4) is fixedly connected with a sliding cylinder (35). A sliding ring (46) is slidably connected to the outer side wall of the sliding cylinder (35). A central cylinder (33) is slidably connected to the outer side wall of the sliding ring (46). A dust falling plate (31) is fixedly connected to the outer side wall of the central cylinder (33). A plurality of dust discharging grooves (32) are arranged in an array along the center of the upper surface of the dust falling plate (31). An elastic scraping structure is arranged at the upper end of the sliding ring (46), which can scrape the upper surface of the dust falling plate (31), and the elastic scraping structure can block the dust discharging grooves (32). An arc-shaped connecting plate (30) is installed on the outer side wall of the dust falling plate (31), and the arc-shaped connecting plate (30) is fixedly connected with the sliding rod (19). Two spring six (47) are symmetrically installed at the lower end of the arc-shaped connecting plate (30).

2. The indoor dust filtering device for safety engineering according to claim 1, characterized in that: The filtering structure includes a plurality of rotating plates (5). The rotating plates (5) are fixedly connected to the outer side wall of the hollow column (4) at equal intervals. A filter plate (6) is installed on one side of each rotating plate (5). The lower end of the sliding cylinder (35) is slidably connected to the upper slot of the air outlet pipe (3).

3. An indoor dust filtering device for safety engineering according to claim 1, characterized in that: The flexible connection structure includes a central rod (45). The upper end of the central rod (45) is fixedly connected with the pulley (11). The lower end of the central rod (45) is movably connected to the bottom of the inner cavity of the positioning cylinder (7). Two L-shaped sliding grooves (8) are symmetrically arranged on the outer side wall of the positioning cylinder (7). A slider (9) is slidably connected to the inner wall of each L-shaped sliding groove (8), and the slider (9) is fixedly connected with the central rod (45). A spring one (10) is fixedly connected to the bottom of the inner cavity of the positioning cylinder (7). The upper end of the spring one (10) is connected with the two sliders (9) together, and the spring one (10) is sleeved on the outer side wall of the central rod (45).

4. An indoor dust filtering device for safety engineering according to claim 1, wherein: The speed change structure includes a connecting cylinder (18). The connecting cylinder (18) is rotatably connected to the upper end of the bottom plate (51). A driving wheel (16) is fixedly connected to the upper end of the connecting cylinder (18). A plurality of expansion blocks (17) are slidably connected to the outer side wall of the driving wheel (16). The inner wall of the driving wheel (16) is movably connected with the sliding rod (19). The upper end of the sliding rod (19) is fixedly connected with a conical head column (20), and the outer side walls of the sliding rod (19) and the conical head column (20) can both abut against one end of the expansion block (17).

5. The indoor dust filtering device for safety engineering according to claim 1, characterized in that: The climbing structure includes a connecting plate (25), the connecting plate (25) is fixedly connected to the outer side wall of the filter barrel (1), a rack (26) is slidably connected to one side of the connecting plate (25) close to the sliding rod (19), an L-shaped connecting plate (21) is sleeved on the outer side wall of the sliding rod (19), and the L-shaped connecting plate (21) is slidably connected to the connecting plate (25). A first bevel gear (22) is fixedly connected to the outer side wall of the L-shaped connecting plate (21), a second bevel gear (23) meshing with the first bevel gear (22) is rotatably connected to the inner side wall of the L-shaped connecting plate (21), a driving gear (24) is rotatably connected to one side of the L-shaped connecting plate (21) away from the second bevel gear (23), and the driving gear (24) is fixedly connected to the second bevel gear (23).

6. The indoor dust filtering device for safety engineering according to claim 5, characterized in that: A bevel block (27) is slidably connected to the upper and lower inner walls of the connecting plate (25), and the bevel block (27) is slidably abutted against the back surface of the rack (26). A third spring (28) is fixedly connected to the lower end of the bevel block (27), a contact bar (29) is fixedly connected to one side of the bevel block (27) close to the sliding rod (19), and the upper surface of the contact bar (29) can abut against the L-shaped connecting plate (21).

7. An indoor dust filtering device for safety engineering according to claim 1, characterized in that: The elastic scraping structure includes a fifth spring (44), the fifth spring (44) is fixedly connected to the upper end of the sliding ring (46), a ring (401) is fixedly connected to the upper end of the fifth spring (44), a plurality of scraping plates (40) are fixedly connected to the outer side wall of the ring (401) at equal intervals, and the scraping plates (40) can be embedded into the cavities of the corresponding ash discharge grooves (32). A plurality of vertical grooves (41) are formed in the outer side wall of the sliding ring (46), and a plurality of inclined arc grooves (42) are also formed in the outer side wall of the sliding ring (46), and each inclined arc groove (42) communicates with the vertical groove (41) at the corresponding position. A plurality of embedding columns (34) are fixedly connected to the inner wall of the central cylinder (33), and the embedding columns (34) are slidably connected to the vertical grooves (41) and the inclined arc grooves (42) at the corresponding positions. A limiting ring (43) is fixed to the outer side wall of the sliding cylinder (35), and the limiting ring (43) can abut against the upper end of the ring (401).

8. An indoor dust filtering device for safety engineering according to claim 7, characterized in that: A bottom ring (36) is fixedly connected to the lower end of the sliding ring (46), a fourth spring (39) sleeved on the outer side wall of the sliding ring (46) is fixedly connected to the upper end of the bottom ring (36), and the fourth spring (39) abuts against the lower end of the central cylinder (33). Two push plates (37) are symmetrically and fixedly connected to the outer side wall of the bottom ring (36), and two limiting blocks (38) are symmetrically and fixedly connected to the inner side wall of the filter barrel (1), and each limiting block (38) can abut against the push plate (37) at the corresponding position.

9. The indoor dust filtering device for safety engineering according to claim 1, characterized in that: A drive motor (52) is installed at the upper end of the bottom plate (51). A transmission wheel is fixedly connected to the output end of the drive motor (52). A drive belt is sleeved between the transmission wheel and the connecting cylinder (18). Two sealing shells (49) are symmetrically installed on the outer side wall of the filter barrel (1). The sealing shells (49) are slidably connected to the arc-shaped connecting plate (30). Two sealing plates (50) are symmetrically installed at the upper and lower ends of the arc-shaped connecting plate (30). Each sealing plate (50) is slidably connected to the side surface of the sealing shell (49). A limiting frame (13) is fixedly connected to the upper surface of the filter barrel (1). A tensioning rod (14) is slidably connected to the inner side wall of the limiting frame (13). The tensioning rod (14) abuts against the inner side wall of the transmission belt (12). A second spring (15) is fixedly connected to the inner side wall of the limiting frame (13).

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