Fire-fighting smoke exhaust filtering device for public places

Abstract

The utility model belongs to the field of smoke exhaust equipment in public places, in particular relates to a fire-fighting smoke exhaust filtering device for public places, and aims to solve the problems that the conventional fire-fighting smoke exhaust filtering device is generally poor in filtering effect and difficult to maintain. In order to solve the problems that in the prior art, in the prior art, a single filtering mode cannot meet the requirement, the following scheme is provided: the device comprises a filtering box, a supporting bottom plate is fixedly connected to the bottom of the filtering box, air holes for air inlet and air outlet are formed in the two sides of the filtering box, and an air outlet filtering plate and an air inlet filtering plate are fixedly embedded in the two air holes respectively; the middle position of the inner wall of the filter box is fixedly connected with a partition plate, the primary filter assembly and the refilter assembly are arranged, and the primary filter assembly is used for primarily filtering flue gas through an annular filter screen to remove large-particle impurities; and the refiltering assembly adsorbs and filters the flue gas again through activated carbon in a first sleeve and a second sleeve, so that harmful substances in the flue gas are effectively removed.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust equipment in public places, in particular to a fire-fighting smoke exhaust filtering device used in public places. Background Art

[0002] Fire safety is of vital importance in public places, such as shopping malls, hotels, office buildings, etc. Once a fire occurs, the smoke generated will not only threaten people's lives and safety, but also damage the equipment and structures in the building. Therefore, the fire smoke exhaust system has become an indispensable part of public places. However, traditional fire smoke exhaust systems often only focus on the emission of smoke, but ignore the filtration and purification of smoke, resulting in a large amount of harmful substances in the emitted smoke, causing secondary pollution to the environment.

[0003] In order to solve this problem, some fire smoke exhaust filtration devices have appeared on the market, but these devices generally have problems such as poor filtering effect and difficult maintenance. Especially when the smoke concentration is high, a single filtering method often cannot meet the requirements, and multiple filtering methods are required to ensure the purification effect of the smoke. At the same time, the structural complexity and ease of operation of the device are also important factors affecting its practicality. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of poor filtering effect and difficult maintenance of the existing fire smoke exhaust filter devices in the prior art. In particular, when the smoke concentration is high, a single filtering method often cannot meet the requirements and multiple filtering methods are required to ensure the purification effect of the smoke. A fire smoke exhaust filter device for public places is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fire smoke exhaust filter device for public places comprises a filter box, the bottom of the filter box is fixedly connected to a supporting bottom plate, both sides of the filter box are provided with air holes for air intake and air outlet, an air outlet filter plate and an air inlet filter plate are fixedly embedded in the two air holes, one end of the filter box is fixedly connected to a smoke exhaust pipe, the smoke exhaust pipe is used in conjunction with the air outlet filter plate and is used to exhaust smoke, a partition is fixedly connected to the middle position of the inner wall of the filter box, the partition divides the inner cavity of the filter box into two spaces, a rectangular hole is opened in the partition, a U-shaped block is fixedly connected to the top inner wall of the filter box, a circular baffle is fixedly connected to the bottom of the U-shaped block, and a primary filter component for primary filtering of smoke is arranged on one side of the circular baffle;

[0007] A re-filtering component for re-filtering the smoke is slidably penetrated inside the rectangular hole;

[0008] The cleaning component is arranged inside the primary filtering component and is used to clean the impurities remaining inside the device.

[0009] In one possible design, the primary filter assembly includes a rectangular slider slidably connected to the inside of the U-shaped block, an annular filter is fixedly connected to one side of the rectangular slider, one end of the annular filter is in contact with one side of a circular baffle, and a second fan is fixedly connected to one side of the inner wall of the filter box, the second fan is used in conjunction with the annular filter, and the second fan is located between the annular filter and the air inlet filter plate.

[0010] In a possible design, a cover plate is fixedly connected to the top of the rectangular slider, a placement hole is provided at the top of the filter box, the cover plate is embedded in the placement hole, a threaded groove is provided on one side of the cover plate, a threaded hole is provided on one side of the filter box, a connected clearance hole is provided on one side of the threaded hole, the threaded hole and the internal threads of the clearance hole are connected with the same fixing screw, and the fixing screw is threadedly connected to the threaded groove.

[0011] In a possible design, the re-filtration assembly includes a first sleeve that slides through the rectangular hole, one end of the first sleeve is fixedly connected to a first fan, and one side of the first fan is fixedly connected to a second sleeve.

[0012] In a possible design, a positioning rod is fixedly connected to one side of the bottom of the annular filter, a cross plate is fixedly connected to one side of the bottom of the second sleeve, and two symmetrical positioning grooves are opened on the top of the cross plate, and the positioning grooves are engaged with the positioning rod.

[0013] In a possible design, four bottom corners of the support base are fixedly connected with moving wheels.

[0014] In a possible design, triangular plates are fixedly connected to the inner walls on both sides of the bottom of the filter box, and two symmetrically arranged ash discharge holes are opened at the bottom of the filter box. The two ash discharge holes are respectively located on both sides of the partition, and a collecting box is placed on the top of the supporting bottom plate, and the collecting box is used to collect impurities.

[0015] In a possible design, a cleaning component is provided inside the primary filtering component and is used to clean the impurities remaining inside the device, the cleaning component comprises an upper sealing plate fixedly connected to one end of the annular filter, a fixed vertical plate is fixedly connected to the bottom of the upper sealing plate, a fixed annular block is fixedly connected to the bottom of the fixed vertical plate, a second rotating shaft is passed through the internal rotation of the fixed annular block, a U-shaped block is fixedly connected to one end of the second rotating shaft, a cross bar is fixedly connected to one side of the cross bar, a brush plate is fixedly connected to one side of the brush plate, a plurality of bristles are fixedly connected to one side of the brush plate, and the plurality of bristles are all in conflict with the inner wall of the annular filter and are used to clean the inner wall of the annular filter, one end of the rotating shaft of the second fan is fixedly connected to the first rotating shaft, one end of the first rotating shaft is fixedly connected to a card plate, the card plate is carded with the U-shaped card block and is used to drive the U-shaped card block to rotate, a lower sealing plate is fixedly connected to the bottom of one side of the second fan, and the lower sealing plate cooperates with the upper sealing plate and is used to seal the gap between the annular filter and the second fan.

[0016] In a possible design, the interior of the circular baffle is hollow, a suction port is opened on one side of the circular baffle, a diaphragm vacuum pump is fixedly installed inside the filter box, the suction end of the diaphragm vacuum pump is connected to the cavity of the circular baffle through a connecting pipe, and a dust collecting box is fixedly installed inside the filter box, the dust collecting box is located below the diaphragm vacuum pump and is connected to the air outlet end of the diaphragm vacuum pump through a pipe.

[0017] In the present application, when in use, the device is moved to a suitable position, and the moving wheel is a universal wheel with a brake, which can stabilize the device in a certain position. At this time, the second fan is started, and the second fan sends the smoke into the interior of the filter box through the air inlet filter plate, and after filtering through the annular filter screen, it is dispersed to the interior of the filter box, and at this time, one end of the second sleeve is tightly pressed against the circular baffle, so that the smoke cannot enter through the second sleeve, and after entering the space on the other side of the partition from the inside of the rectangular hole, it is finally filtered again through the air outlet filter plate and discharged. The aperture of the air inlet filter plate is larger than the aperture of the air outlet filter plate and the annular filter screen, which can prevent large impurities from being sucked in, thereby causing blockage of the second fan;

[0018] When the smoke concentration is high and multiple filtration is required, the braking state of the cover plate can be released by fixing the screws. At this time, the cover plate can be moved upward, and the annular filter and the rectangular slider can be moved out from the inside of the placement hole, and the positioning rod can also be moved out from the inside of the positioning groove, which can not only release the braking state of the horizontal plate, but also facilitate the cleaning of the annular filter. The first fan and the second sleeve are moved horizontally in the direction close to the air outlet filter plate. At this time, the first fan contacts one side of the partition plate, thereby blocking the rectangular hole, and one side of the second sleeve is separated from the circular baffle. One end of the first sleeve is pressed against the inner wall of one side of the filter box and used in conjunction with the air outlet filter plate. The cover plate is moved down again, and the positioning rod is stuck in the inside of another positioning groove, and the horizontal plate is fixed again. At this time, after the smoke is discharged from the inside of the annular filter, it can only pass through the inside of the second sleeve, and the first fan can be started to help the smoke enter the inside of the first sleeve from the inside of the second sleeve, and finally be discharged through the air outlet filter plate, and finally discharged through the smoke exhaust pipe. Since the inside of the second sleeve and the first sleeve are filled with activated carbon, impurities in the smoke can be adsorbed again to improve the filtering effect;

[0019] During use, the diaphragm vacuum pump can be started. The diaphragm vacuum pump can extract the impurities remaining inside the annular filter through the pipeline and the suction port, and discharge them into the dust box for collection, which can reduce the accumulation of impurities in the annular filter and thus extend the continuous use time of the device. When the cover plate is vertically inserted into the device, the U-shaped block is connected with the card plate, and the upper sealing plate and the lower sealing plate seal the gap between the second fan and the annular filter. At the same time, the first shaft and the card plate can be rotated by the power of the second fan, and the card plate drives the U-shaped block to rotate, and the U-shaped block drives the second shaft to rotate, and the second shaft drives the cross bar to rotate, and the cross bar drives the brush plate and the bristles to rotate, so as to clean the inner wall of the annular filter and ensure the filtering efficiency of the flue gas.

[0020] Beneficial effects: The device is equipped with a primary filter component and a secondary filter component. The primary filter component performs a primary filter on the smoke through an annular filter to remove large particles of impurities; the secondary filter component uses the activated carbon inside the first sleeve and the second sleeve to adsorb and filter the smoke again, effectively removing harmful substances in the smoke. This multiple filtering mechanism ensures the purification effect of the smoke.

[0021] The device allows flexible adjustment of the filtering mode according to the smoke concentration. When the smoke concentration is low, only the primary filter assembly can be used for filtering; when the smoke concentration is high, the cover plate braking state can be released, the annular filter and the rectangular slider can be moved, and the first fan can be started for secondary filtering. This flexible filtering mode improves the practicality and adaptability of the device.

[0022] The structural design of the device allows the annular filter and re-filter assembly to be easily removed and cleaned, reducing the difficulty and cost of maintenance. At the same time, the components are firmly fixed and positioned through structural parts such as fixing screws and positioning rods, ensuring the stability and safety of the device.

[0023] The bottom of the device is provided with universal wheels with brakes, which can be easily moved to a suitable position for use, thereby improving the convenience and flexibility of the device.

[0024] By efficiently filtering and purifying flue gas, this device reduces the emission of harmful substances and protects the environment. At the same time, through reasonable structural design and material selection, the energy consumption and cost of the device are reduced;

[0025] The device utilizes the power of the second fan to clean the inner wall of the annular filter, thereby reducing the blockage of the annular filter and improving the efficiency of smoke filtration. The collected impurities will gradually accumulate in the lower half of the annular filter and will finally be extracted as a whole through a diaphragm vacuum pump, thereby reducing the accumulation of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional structural schematic diagram of a fire smoke exhaust filter device for public places proposed by the utility model;

[0027] Figure 2 This is a three-dimensional cross-sectional structural schematic diagram of a fire smoke exhaust filter device for public places proposed by the utility model;

[0028] Figure 3 This is a three-dimensional structural schematic diagram of a filter box in a fire smoke exhaust filter device for public places proposed by the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of an annular filter screen and a cover plate of a fire smoke exhaust filter device for public places proposed by the utility model;

[0030] Figure 5 This is a three-dimensional structural schematic diagram of a first sleeve and a second sleeve in a fire smoke exhaust filter device for public places proposed by the utility model;

[0031] Figure 6 A three-dimensional structural schematic diagram of a brush plate and an annular filter screen in a fire smoke exhaust filter device for public places proposed by the utility model;

[0032] Figure 7 The utility model is a schematic diagram of the structure of an annular filter screen and a circular baffle in a fire smoke exhaust filter device for public places.

[0033] In the figure: 1, filter box; 2, support bottom plate; 3, moving wheel; 4, collection box; 5, air outlet filter plate; 6, cover plate; 7, triangular plate; 8, air inlet filter plate; 9, first fan; 10, first sleeve; 11, rectangular hole; 12, partition; 13, U-shaped block; 14, placement hole; 15, threaded hole; 16, clearance hole; 17, second fan; 18, circular baffle; 19, ash discharge hole; 20, threaded groove; 21, fixing screw; 22, ring shaped filter; 23, positioning rod; 24, rectangular slider; 25, second sleeve; 26, positioning groove; 27, horizontal plate; 28, smoke exhaust pipe; 29, diaphragm vacuum pump; 30, dust box; 31, lower sealing plate; 32, first rotating shaft; 33, clamping plate; 34, fixed vertical plate; 35, fixed annular block; 36, U-shaped clamping block; 37, second rotating shaft; 38, horizontal rod; 39, brush plate; 40, bristles; 41, upper sealing plate; 42, suction port. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Example 1

[0036] Reference Figure 1-7A filtering device comprises a filter box 1, the bottom of the filter box 1 is fixedly connected to a supporting bottom plate 2, both sides of the filter box 1 are provided with air holes for air intake and air exhaust, the insides of the two air holes are respectively fixedly embedded with an air outlet filter plate 5 and an air inlet filter plate 8, one end of the filter box 1 is fixedly connected to a smoke exhaust pipe 28, the smoke exhaust pipe 28 is used in conjunction with the air outlet filter plate 5 and is used to exhaust smoke, the smoke exhaust pipe 28 extends to the outdoors away from the end of the filter box 1, the smoke exhaust pipe 28 is a retractable hose (such as a corrugated pipe), and a partition 12 is fixedly connected to the middle position of the inner wall of the filter box 1, and the partition 12 divides the inner cavity of the filter box 1 into two A space is formed, a rectangular hole 11 is formed inside the partition 12, a U-shaped block 13 is fixedly connected to the top inner wall of the filter box 1, a circular baffle 18 is fixedly connected to the bottom of the U-shaped block 13, a primary filter assembly for primary filtering of the smoke is arranged on one side of the circular baffle 18, the primary filter assembly comprises a rectangular slider 24 slidably connected to the inside of the U-shaped block 13, a ring filter 22 is fixedly connected to one side of the rectangular slider 24, one end of the ring filter 22 is in conflict with one side of the circular baffle 18, a second fan 17 is fixedly connected to one side of the inner wall of the filter box 1, and the second fan 17 is used in conjunction with the ring filter 22. The second fan 17 is located between the annular filter screen 22 and the air inlet filter plate 8. The top of the rectangular slider 24 is fixedly connected with a cover plate 6. The top of the filter box 1 is provided with a placement hole 14. The cover plate 6 is embedded in the placement hole 14. A threaded groove 20 is provided on one side of the cover plate 6. A threaded hole 15 is provided on one side of the filter box 1. A connecting hole 16 is provided on one side of the threaded hole 15. The internal threads of the threaded hole 15 and the hole 16 are connected with the same fixing screw 21. The fixing screw 21 is threadedly connected with the threaded groove 20. The device is moved to a suitable position. The moving wheel 3 is a universal wheel with a brake, which can stabilize the device. At a certain position, the second fan 17 is started at this time, and the second fan 17 sends the smoke into the interior of the filter box 1 through the air inlet filter plate 8, and after being filtered by the annular filter screen 22, it is dispersed into the interior of the filter box 1, and at this time, one end of the second sleeve 25 is tightly pressed against the circular baffle 18, so that the smoke cannot enter through the second sleeve 25, and enters the space on the other side of the partition 12 from the inside of the rectangular hole 11, and finally passes through the air outlet filter plate 5 for filtering again and then discharged. The aperture of the air inlet filter plate 8 is larger than the aperture of the air outlet filter plate 5 and the annular filter screen 22, which can prevent large impurities from being sucked in, thereby causing blockage of the second fan 17;

[0037] A re-filtering assembly for re-filtering the smoke is slidably penetrated inside the rectangular hole 11, and the re-filtering assembly includes a first sleeve 10 slidably penetrated inside the rectangular hole 11, one end of the first sleeve 10 is fixedly connected to the first fan 9, one side of the first fan 9 is fixedly connected to the second sleeve 25, one bottom side of the annular filter 22 is fixedly connected to a positioning rod 23, one bottom side of the second sleeve 25 is fixedly connected to a cross plate 27, and two symmetrically arranged positioning grooves 26 are provided on the top of the cross plate 27, and the positioning grooves 26 are engaged with the positioning rods 23. When the smoke concentration is high and multiple filtering is required, the braking state of the cover plate 6 can be released by fixing the screws 21, and the cover plate 6 can be moved upward at this time, and then the annular filter 22 and the rectangular slider 24 can be moved out from the inside of the placement hole 14, and the positioning rod 23 can also be moved out from the inside of the positioning groove 26, which can not only release the braking state of the cross plate 27, but also facilitate The annular filter 22 is cleaned, and the first fan 9 and the second sleeve 25 are moved laterally toward the direction close to the air outlet filter plate 5. At this time, the first fan 9 contacts one side of the partition 12, thereby blocking the rectangular hole 11, and one side of the second sleeve 25 is disengaged from the circular baffle 18. One end of the first sleeve 10 is pressed against the inner wall of one side of the filter box 1 and used in conjunction with the air outlet filter plate 5. The cover plate 6 is moved down again, and the positioning rod 23 is inserted into the inside of another positioning groove 26 to fix the cross plate 27 again. At this time, after the smoke is discharged from the inside of the annular filter 22, it can only pass through the inside of the second sleeve 25, and the first fan 9 can be started to help the smoke enter the inside of the first sleeve 10 from the inside of the second sleeve 25, and finally be discharged through the air outlet filter plate 5. Since the inside of the second sleeve 25 and the first sleeve 10 are filled with activated carbon, impurities in the smoke can be adsorbed again to improve the filtering effect.

[0038] A cleaning component is arranged inside the primary filtering component and is used to clean the impurities remaining inside the device. The cleaning component includes an upper sealing plate 41 fixedly connected to one end of the annular filter screen 22, a fixed vertical plate 34 is fixedly connected to the bottom of the upper sealing plate 41, a fixed annular block 35 is fixedly connected to the bottom of the fixed vertical plate 34, a second rotating shaft 37 is passed through the internal rotation of the fixed annular block 35, one end of the second rotating shaft 37 is fixedly connected to a U-shaped block 36, the other end of the second rotating shaft 37 is fixedly connected to a cross bar 38, one side of the cross bar 38 is fixedly connected to a brush plate 39, one side of the brush plate 39 is fixedly connected to a plurality of bristles 40, and the plurality of bristles 40 are all connected to the The inner wall of the annular filter screen 22 conflicts with each other and is used to clean the inner wall of the annular filter screen 22. One end of the rotating shaft of the second fan 17 is fixedly connected to the first rotating shaft 32, and one end of the first rotating shaft 32 is fixedly connected to the clamping plate 33. The clamping plate 33 is clamped with the U-shaped clamping block 36 and is used to drive the U-shaped clamping block 36 to rotate. A lower sealing plate 31 is fixedly connected to the bottom of one side of the second fan 17. The lower sealing plate 31 cooperates with the upper sealing plate 41 and is used to seal the gap between the annular filter screen 22 and the second fan 17. The interior of the circular baffle 18 is hollow, and a suction port 42 is opened on one side of the circular baffle 18. The inner wall of the annular filter screen 22 is inclined (refer to the attached Figure 7 ), a diaphragm vacuum pump 29 is fixedly installed inside the filter box 1, and the suction end of the diaphragm vacuum pump 29 is connected to the cavity of the circular baffle 18 through a connecting pipe. A dust collecting box 30 is fixedly installed inside the filter box 1, and the dust collecting box 30 is located below the diaphragm vacuum pump 29 and is connected to the air outlet end of the diaphragm vacuum pump 29 through a pipe. During use, the diaphragm vacuum pump 29 can be started, and the diaphragm vacuum pump 29 can extract the impurities remaining in the annular filter screen 22 through the pipe and the suction port 42, and discharge them into the dust collecting box 30 for collection, which can reduce the accumulation of impurities in the annular filter screen 22. In order to extend the continuous use time of the device, when the cover plate 6 is vertically inserted into the interior of the device, the U-shaped block 36 is connected with the card plate 33, and the upper sealing plate 41 and the lower sealing plate 31 realize the sealing of the gap between the second fan 17 and the annular filter 22. At the same time, the first rotating shaft 32 and the card plate 33 can be rotated by the power of the second fan 17, and the card plate 33 drives the U-shaped block 36 to rotate, and the U-shaped block 36 drives the second rotating shaft 37 to rotate, and the second rotating shaft 37 drives the cross bar 38 to rotate, and the cross bar 38 drives the brush plate 39 and the bristles 40 to rotate, so as to clean the inner wall of the annular filter 22, thereby ensuring the filtering efficiency of the smoke.

[0039] The present application can be used in the field of smoke exhaust equipment in public places, and can also be used in other fields applicable to the present application.

[0040] Example 2

[0041] refer to Figure 1-7, improved on the basis of Example 1: a fire smoke exhaust filtering device for public places, which is applied to the field of smoke exhaust equipment in public places, the four corners of the bottom of the supporting base plate 2 are fixedly connected with moving wheels 3, the inner walls on both sides of the bottom of the filter box 1 are fixedly connected with triangular plates 7, and the bottom of the filter box 1 is provided with two symmetrically arranged ash discharge holes 19, and the two ash discharge holes 19 are respectively located on both sides of the partition 12, and a collecting box 4 is placed on the top of the supporting base plate 2, and the collecting box 4 is used to collect impurities.

[0042] However, as is well known to those skilled in the art, the working principles and wiring methods of the diaphragm vacuum pump 29, the first fan 9 and the second fan 17 are commonplace. The diaphragm vacuum pump 29 model is a B20 series corrosion-resistant diaphragm vacuum pump, which are all conventional means or common knowledge and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0043] The drawings in the specification of this application are for illustration only, and the sizes and shapes of the components shown therein are not actually limited, but are only for illustration. In the actual implementation process, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fire smoke exhaust filter device for public places, characterized in that: include: A filter box (1), wherein the bottom of the filter box (1) is fixedly connected to a supporting bottom plate (2), both sides of the filter box (1) are provided with air holes for air intake and air exhaust, an air outlet filter plate (5) and an air inlet filter plate (8) are fixedly embedded in the two air holes respectively, one end of the filter box (1) is fixedly connected to a smoke exhaust pipe (28), the smoke exhaust pipe (28) is used in conjunction with the air outlet filter plate (5) and is used to exhaust smoke, a partition plate (12) is fixedly connected to the middle position of the inner wall of the filter box (1), the partition plate (12) divides the inner cavity of the filter box (1) into two spaces, a rectangular hole (11) is provided in the partition plate (12), a U-shaped block (13) is fixedly connected to the top inner wall of the filter box (1), a circular baffle plate (18) is fixedly connected to the bottom of the U-shaped block (13), and a primary filter component for primary filtering of smoke is provided on one side of the circular baffle plate (18); A re-filtering component for re-filtering the smoke is slidably penetrated inside the rectangular hole (11); It also includes a cleaning component, which is arranged inside the primary filtering component and is used to clean the impurities remaining inside the device.

2. A fire smoke exhaust filter device for public places according to claim 1, characterized in that: The primary filter assembly comprises a rectangular slider (24) slidably connected to the inside of the U-shaped block (13); an annular filter screen (22) is fixedly connected to one side of the rectangular slider (24); one end of the annular filter screen (22) abuts against one side of a circular baffle (18); a second fan (17) is fixedly connected to one side of the inner wall of the filter box (1); the second fan (17) is used in conjunction with the annular filter screen (22); the second fan (17) is located between the annular filter screen (22) and the air inlet filter plate (8).

3. A fire smoke exhaust filter device for public places according to claim 2, characterized in that: The top of the rectangular sliding block (24) is fixedly connected to a cover plate (6), the top of the filter box (1) is provided with a placement hole (14), the cover plate (6) is embedded in the placement hole (14), one side of the cover plate (6) is provided with a threaded groove (20), one side of the filter box (1) is provided with a threaded hole (15), one side of the threaded hole (15) is provided with a communicating clearance hole (16), the inner parts of the threaded hole (15) and the clearance hole (16) are threadedly connected with the same fixing screw (21), and the fixing screw (21) is threadedly connected to the threaded groove (20).

4. A fire smoke exhaust filter device for public places according to claim 2, characterized in that: The re-filtration assembly comprises a first sleeve (10) which slides through the interior of the rectangular hole (11); one end of the first sleeve (10) is fixedly connected to a first fan (9); and one side of the first fan (9) is fixedly connected to a second sleeve (25).

5. A fire smoke exhaust filter device for public places according to claim 4, characterized in that: A positioning rod (23) is fixedly connected to one side of the bottom of the annular filter (22), a transverse plate (27) is fixedly connected to one side of the bottom of the second sleeve (25), and two symmetrically arranged positioning grooves (26) are formed on the top of the transverse plate (27), and the positioning grooves (26) are engaged with the positioning rod (23).

6. A fire smoke exhaust filter device for public places according to claim 1, characterized in that: The four bottom corners of the supporting base plate (2) are all fixedly connected with moving wheels (3).

7. The fire smoke exhaust filter device for public places according to claim 1, characterized in that: The inner walls on both sides of the bottom of the filter box (1) are fixedly connected with triangular plates (7), and the bottom of the filter box (1) is provided with two symmetrically arranged ash discharge holes (19), the two ash discharge holes (19) are respectively located on both sides of the partition (12), and a collection box (4) is placed on the top of the supporting bottom plate (2), and the collection box (4) is used to collect impurities.

8. The fire smoke exhaust filter device for public places according to claim 2, characterized in that: The cleaning assembly comprises an upper sealing plate (41) fixedly connected to one end of the annular filter (22); a fixed vertical plate (34) is fixedly connected to the bottom of the upper sealing plate (41); a fixed annular block (35) is fixedly connected to the bottom of the fixed vertical plate (34); a second rotating shaft (37) is rotatably passed through the interior of the fixed annular block (35); a U-shaped clamping block (36) is fixedly connected to one end of the second rotating shaft (37); a cross bar (38) is fixedly connected to the other end of the second rotating shaft (37); a brush plate (39) is fixedly connected to one side of the cross bar (38); and a plurality of bristles (40) are fixedly connected to one side of the brush plate (39). The plurality of bristles (40) are in contact with the inner wall of the annular filter (22) and are used to clean the inner wall of the annular filter (22); one end of the rotating shaft of the second fan (17) is fixedly connected to the first rotating shaft (32); one end of the first rotating shaft (32) is fixedly connected to a clamping plate (33); the clamping plate (33) is clamped with a U-shaped clamping block (36) and is used to drive the U-shaped clamping block (36) to rotate; a lower sealing plate (31) is fixedly connected to the bottom of one side of the second fan (17); the lower sealing plate (31) cooperates with the upper sealing plate (41) and is used to seal the gap between the annular filter (22) and the second fan (17).

9. The fire smoke exhaust filter device for public places according to claim 2, characterized in that: The interior of the circular baffle (18) is hollow, and a suction port (42) is provided on one side of the circular baffle (18). A diaphragm vacuum pump (29) is fixedly installed inside the filter box (1), and the suction end of the diaphragm vacuum pump (29) is connected to the cavity of the circular baffle (18) through a connecting pipe. A dust collecting box (30) is fixedly installed inside the filter box (1), and the dust collecting box (30) is located below the diaphragm vacuum pump (29) and is connected to the air outlet end of the diaphragm vacuum pump (29) through a pipe.

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