Filtering and dust collecting equipment for circulating ventilator

Abstract

The equipment comprises a positioning pipe used for being arranged at an air outlet of the ventilator in a clamped mode, a limiting pressing plate arranged at one end of the positioning pipe, a flow guide pipe arranged on the inner wall of the side, close to the air outlet, of the limiting pressing plate and used for limiting and buffering in the installation process, and a sealing gasket ring arranged on the inner wall of the side, close to the air outlet, of the limiting pressing plate. The flow guide pipe is clamped in the positioning pipe and used for guiding and conveying internal airflow, and the dust blocking mechanism is clamped in the limiting pressing plate; compared with the prior art, when airflow passes through the adsorption shaft, an impurity adsorption effect can be achieved, dust residues of the exhausted airflow in the ventilator can be reduced, a blocking plate can be driven to move along with the airflow effect, a transmission pipe can be pulled to move under the effect of a transmission belt and a rubber shaft, and therefore the adsorption shaft moves; and dust and the like on the surface of the adsorption shaft can be extruded and adhered to a grid piece in the air guide ring, and the collection effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation equipment, and particularly to a filtering and dust suction device for a circulating ventilator. Background Art

[0002] The air outlet of a fan is the opening part in the fan structure for discharging gas (usually air). It is usually connected to the air inlet of the fan box and the exhaust duct, and through the operation of the fan, the indoor air flow and renewal are realized.

[0003] The air outlet has many applications and has the advantages of beautiful structure and no space occupation. It is applied to indoor ventilation, air-conditioning ventilation and other equipment. However, most of the existing air outlets only have functions such as opening and closing, adjusting the wind direction, etc., and do not have the function of air filtration. During the use of the fan, most of the dust particles and the like are retained on the surface of the filter materials such as filter cartridges or cloth bags in the internal filtration system, and the purified air continues to flow. However, after a long time of filtration, the filtration performance of the filter screen will be greatly reduced, and due to the blockage of dust, the air output will also be reduced, which will also cause discomfort to the indoor personnel. Therefore, we propose a filtering and dust suction device for a circulating ventilator to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a filtering and dust suction device for a circulating ventilator to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A filtering and dust suction device for a circulating ventilator, including,

[0006] A positioning tube, which is used to be clamped at the air outlet of the ventilator;

[0007] A limiting pressing plate, which is arranged at one end of the positioning tube. A sealing gasket ring is arranged on the inner wall of the limiting pressing plate close to the air outlet side for limiting and buffering during the installation process;

[0008] A guiding tube, which is clamped inside the positioning tube and is used for guiding and transmitting the internal air flow;

[0009] A dust blocking mechanism, which is clamped inside the limiting pressing plate. The dust blocking mechanism is used to separate the remaining dust debris and the like in the air flow, which is convenient for subsequent collection and cleaning. When it is necessary to screen the air flow discharged by the circulating fan, the positioning tube can be clamped on the air outlet, and with the help of the guiding tube and the dust blocking mechanism for blocking and separating, it can effectively reduce the entry of dust debris and the like into the room and reduce the impact on the environment.

[0010] Preferably, a plurality of buffer pressing plates are installed at one end of the limit pressing plate. A bolt groove is provided at the top of the buffer pressing plate. The buffer pressing plate is in a "J" shape. A plurality of fixing plates are installed on the side wall of the limit pressing plate. The fixing plates are located directly below the buffer pressing plate. A straight groove is provided on the fixing plate.

[0011] Preferably, a compression ring is installed at one end of the fixing plate. The compression ring has elasticity. The compression ring is located at the bottom of one end of the buffer pressing plate. The buffer pressing plate can abut against the top of the compression ring.

[0012] Preferably, both ends of the diversion pipe are in an outwardly expanding shape. A plurality of welding plates are provided on one side of the diversion pipe. The welding plates are arranged in a uniform array on the diversion pipe. A plurality of transmission pipes are provided on the inner wall of the air inlet side of the diversion pipe. The positions of the transmission pipes correspond to the welding plates. A wind guide ring is installed at one end of the transmission pipe. A plurality of grid pieces are provided on the inner wall of the wind guide ring. An adsorption shaft is installed between the transmission pipes. The transmission pipe has elasticity and a pair of rubber ropes are fixedly connected to the surface thereof. One end of the rubber shaft is provided with a transmission belt. A docking plate is installed at the bottom of the welding plate. The transmission belt and the rubber shaft are both movably clamped in the gap between the docking plate and the welding plate;

[0013] A support rod is fixedly connected to the welding plate. A plurality of fixing rings are provided on the support rod. A clamping groove is provided on the transmission pipe. The fixing ring is arranged inside the clamping groove.

[0014] Preferably, a blocking plate is provided on the air inlet side of the diversion pipe. An annular groove is provided on the side wall of the blocking plate. A movable ring is provided inside the annular groove. One end of each transmission belt is movably clamped on the surface of the movable ring. A plurality of arc-shaped grooves are provided on the blocking plate. A rotating disk is rotatably provided inside the arc-shaped groove. One end of the rotating disk penetrates through the arc-shaped groove and is clamped on the movable ring. The blocking plate can pull the transmission belt to move under the action of air flow, playing a role in assisting dust removal.

[0015] Preferably, the dust blocking mechanism includes a mounting ring, a fixed sieve plate and an arc-shaped separation plate. The mounting ring is installed inside the limit pressing plate. The fixed sieve plate and the arc-shaped separation plate are both clamped inside the mounting ring. The arc-shaped separation plate has elasticity and one end thereof abuts against one side of the fixed sieve plate. A plurality of fixed buckles are installed on the mounting ring. A plurality of insertion rod pins are movably inserted at the bottom of the fixed buckles, and the insertion rod pins are clamped on the outer wall of the fixed sieve plate;

[0016] A connecting plate is installed on the inner wall of the arc-shaped separation plate. A transmission rod is installed on the connecting plate. A spiral groove is provided on the transmission rod.

[0017] Preferably, an annular groove is provided on the inner wall of the fixed screen plate, and a reset ring is clamped inside the annular groove, a plurality of fixed shafts are installed at one end of the reset ring, and a transmission ring is provided on one side of the fixed shaft, a guide shaft is provided inside the transmission ring, and the guide shaft is clamped inside the spiral groove;

[0018] A plurality of support plates are installed on the surface of the transmission ring, and the support plates are evenly arranged on the outer wall of the transmission ring. A pair of swing rings are installed on the inner wall of the support plate, and a cleaning plate is installed on the inner side of the swing ring. The cleaning plate is inclined and the top is against the inner wall of the support plate. A plurality of elastic rings are provided on the surface of the cleaning plate, and the elastic rings are in contact with the inner wall of the arc separation plate. A plurality of dust collecting sheets are fixedly connected to the inner wall of the support plate, and the dust collecting sheets are evenly arranged on the support plate to absorb dust in the airflow.

[0019] Preferably, a sealing ring is installed on the outer wall of the positioning tube, the cross-section of the sealing ring is "V"-shaped, and a plurality of supporting pads are fixedly connected to the inner wall of the sealing ring. The supporting pads are arranged in a uniform array on the inner wall of the sealing ring, and the supporting pads are annular and elastic.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention can change the direction of the airflow when the airflow passes through the guide tube. When the airflow passes through the adsorption shaft, it can adsorb impurities. The airflow can drive the blocking plate to move, and the transmission tube can be pulled to move under the action of the transmission belt and the rubber shaft, so that the adsorption shaft can move, and the dust on the surface of the adsorption shaft can be squeezed and adhered to the grid sheet inside the air guide ring, so as to collect the dust.

[0022] 2. In the installation process, the sealing ring of the present invention can be clamped on the inner wall of the air outlet, and can play a sealing role with the help of the support pad, which can reduce the air leakage caused by the depression of the inner wall of the air outlet during the installation process. In addition, under the cooperation of the buffer pressure plate and the compression ring during the installation process, the positioning tube can have a buffer component during the installation process, thereby reducing the noise generated by vibration during the subsequent air outlet process;

[0023] 3. When the present invention needs to be cleaned after disassembly, the rotating disk can be rotated, so that the movable ring pulls the transmission belt and the rubber shaft to move in the opposite direction, and the dust and impurities in the internal docking can be quickly cleaned with the water flow, which can facilitate subsequent disassembly and maintenance;

[0024] 4. When the air flow enters the dust blocking mechanism of the present invention, under the action of the air flow, the arc separation plate can be pushed to move, the transmission rod can move inside the transmission ring, and under the combined action of the spiral groove and the guide shaft, the transmission ring can reciprocate, and the cleaning plate can intermittently clean the inside of the arc separation plate, reducing the situation of blockage caused by dust accumulation;

[0025] 5. In the present invention, dust can accumulate on the dust suction piece along the air flow, and as the cleaning plate deforms, the residual dust on the dust suction piece can be squeezed, enhancing the collection function and avoiding the situation that the dust floats inside the dust blocking mechanism along the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 for the present invention Figure 1 is a partial enlarged schematic view of part A in;

[0028] Figure 3 is a schematic diagram of the internal structure of the positioning tube of the present invention disassembled;

[0029] Figure 4 is a schematic diagram of one side structure of the diversion tube of the present invention;

[0030] Figure 5 for the present invention Figure 4 is a partial enlarged schematic view of part B in;

[0031] Figure 6 is a schematic diagram of the structure of the dust blocking mechanism of the present invention;

[0032] Figure 7 is a schematic diagram of one side structure of the fixed sieve plate of the present invention;

[0033] Figure 8 for the present invention Figure 7 is a partial enlarged schematic view of part C in;

[0034] In the figure: 1. Positioning tube; 2. Limit pressing plate; 3. Diversion tube; 4. Dust blocking mechanism; 11. Sealing ring; 12. Support cushion block; 21. Fixed plate; 22. Compression ring; 23. Buffer pressing plate; 31. Welding plate; 311. Docking plate; 32. Blocking plate; 33. Rotating disk; 34. Transmission tube; 35. Adsorption shaft; 36. Fixed ring; 37. Transmission belt; 41. Installation ring; 411. Fixed buckle plate; 42. Fixed sieve plate; 43. Arc separation plate; 44. Transmission rod; 45. Transmission ring; 451. Reset ring; 46. Support plate; 461. Swing ring; 47. Cleaning plate; 48. Dust suction piece. DETAILED DESCRIPTION OF THE INVENTION

[0035] 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.

[0036] Please refer to Figures 1-8 , the present invention provides a technical solution: a filtering and dust collection device for a cyclic ventilator, including

[0037] a positioning pipe 1, which is used to be clamped at the air outlet of the ventilator;

[0038] a limiting pressing plate 2, which is arranged at one end of the positioning pipe 1. A sealing gasket ring is provided on the inner wall of the limiting pressing plate 2 close to the air outlet side, which is used for limiting and buffering during the installation process;

[0039] a diversion pipe 3, which is clamped inside the positioning pipe 1 and is used for guiding and transmitting the internal air flow;

[0040] a dust blocking mechanism 4, which is clamped inside the limiting pressing plate 2 and is used for separating the residual dust debris, etc. in the air flow, facilitating subsequent collection and cleaning. When it is necessary to screen the air flow discharged by the cyclic fan, the positioning pipe 1 can be clamped on the air outlet, and the diversion pipe 3 and the dust blocking mechanism 4 are used for blocking and separating, which can effectively reduce the entry of dust debris, etc. into the room and reduce the impact on the environment.

[0041] As Figure 1 shown, in order to reduce the situation of deviation during the installation process, a plurality of buffer pressing plates 23 are installed at one end of the limiting pressing plate 2. A bolt groove is clamped at the top of the buffer pressing plate 23. The buffer pressing plate 23 is in a "J" shape. A plurality of fixing plates 21 are installed on the side wall of the limiting pressing plate 2. The fixing plates 21 are located directly below the buffer pressing plate 23. Straight grooves are opened on the fixing plates 21. The fixing plates 21 can abut against the outer wall of the air outlet. At the same time, bolts are inserted into the bolt grooves inside the buffer pressing plate 23, which can push the buffer pressing plate 23 to deform, so that it bends and abuts against one side of the outer wall of the air outlet for auxiliary positioning.

[0042] In order to reduce the situation of noise generated by the vibration of the positioning pipe 1 under the action of the air flow after installation, a compression ring 22 is installed at one end of the fixing plate 21. The compression ring 22 has elasticity. The compression ring 22 is located at the bottom of one end of the buffer pressing plate 23. The buffer pressing plate 23 can abut against the top of the compression ring 22. The compression ring 22 can abut against the outer wall of the air outlet, which is used for buffering and supporting, reducing the situation of vibration and collision between metal parts under the action of the air flow, and reducing the generation of noise.

[0043] As Figure 5As shown, in order to reduce the situation of dust residue in the air flow, both ends of the diversion pipe 3 are outwardly expanding. A plurality of welding plates 31 are provided on one side of the diversion pipe 3. The welding plates 31 are arranged in a uniform array on the diversion pipe 3. A plurality of transmission pipes 34 are provided on the inner wall of the air inlet side of the diversion pipe 3. The positions of the transmission pipes 34 correspond to those of the welding plates 31. A wind guide ring is installed at one end of the transmission pipe 34, and a plurality of grid pieces are provided on the inner wall of the wind guide ring. An adsorption shaft 35 is installed between the transmission pipes 34. The transmission pipe 34 is elastic and a pair of rubber ropes are fixedly connected to its surface. One end of the rubber shaft is provided with a transmission belt 37. A docking plate 311 is installed at the bottom of the welding plate 31. The transmission belt 37 and the rubber shaft are both movably clamped in the gap between the docking plate 311 and the welding plate 31;

[0044] A support rod is fixedly connected to the welding plate 31, and a plurality of fixing rings 36 are provided on the support rod. A clamping groove is formed on the transmission pipe 34, and the fixing ring 36 is arranged inside the clamping groove. Under the guiding action of the diversion pipe 3, the flowing direction of the air flow can be gathered inwards. Under the action of the wind guide ring and the adsorption shaft 35, large-particle dust debris, etc. in the air flow can be adsorbed, reducing the situation of dust entering the room. And when the adsorption shaft 35 moves following the transmission pipe 34, the dust accumulated on the surface of the adsorption shaft 35 can be clamped between the grid pieces, which can extend the maintenance period of the setting.

[0045] As Figure 4 shown, in order to ensure the separation efficiency of the equipment, a baffle plate 32 is provided on the air inlet side of the diversion pipe 3. A ring groove is provided on the side wall of the baffle plate 32, and a movable ring is provided inside the ring groove. One end of each transmission belt 37 is movably clamped on the surface of the movable ring. A plurality of arc-shaped grooves are formed on the baffle plate 32, and a rotating disk 33 is rotatably provided inside the arc-shaped grooves. One end of the rotating disk 33 penetrates through the arc-shaped groove and is clamped on the movable ring. The baffle plate 32 can pull the transmission belt 37 to move under the action of the air flow, playing an auxiliary dust removal role. Under the action of the baffle plate 32 and the diversion pipe 3, the internal air flow can flow along the inclined side of the diversion pipe 3, and the residual dust in the air flow can be adsorbed by means of the adsorption shaft 35, ensuring the dust removal efficiency of the equipment;

[0046] During subsequent cleaning and maintenance, the internal diversion pipe 3 can be disassembled, the rotating disk 33 can be rotated to move, the transmission belt 37 and the rubber shaft can be used to pull the transmission pipe 34 to deform, and with the impact of water flow, the dust accumulated in the gap between the adsorption shaft 35 and the grid pieces can be quickly cleaned, facilitating cleaning and maintenance.

[0047] As Figure 6 and Figure 7As shown in the figure, in order to clean the dust in the air flow entering the inside of the dust shielding mechanism 4, the dust shielding mechanism 4 includes a mounting ring 41, a fixed sieve plate 42 and an arc separation plate 43. The mounting ring 41 is installed inside the limit pressing plate 2. Both the fixed sieve plate 42 and the arc separation plate 43 are clamped inside the mounting ring 41. The arc separation plate 43 is elastic and one end thereof is attached to one side of the fixed sieve plate 42. A plurality of fixed buckles 411 are installed on the mounting ring 41. A plurality of insertion rods are movably inserted at the bottom of the fixed buckles 411, and the insertion rods are clamped on the outer wall of the fixed sieve plate 42;

[0048] A connecting plate is installed on the inner wall of the arc separation plate 43, and a transmission rod 44 is installed on the connecting plate. A spiral groove is formed on the transmission rod 44. As the air flow can push the arc separation plate 43 to deform, it can push the transmission rod 44 to move inside the transmission ring 45. Under the cooperation of the guide shaft and the spiral groove, it can push the transmission ring 45 to rotate reciprocally, which can play a driving role and facilitate subsequent dust cleaning and dust reduction.

[0049] As Figure 8 shown in the figure, in order to reduce the situation of dust flying inside the dust shielding mechanism 4, an annular groove is formed on the inner wall of the fixed sieve plate 42, and a reset ring 451 is clamped inside the annular groove. A plurality of fixed shafts are installed at one end of the reset ring 451, and a transmission ring 45 is arranged on one side of the fixed shaft. A guide shaft is arranged inside the transmission ring 45, and the guide shaft is clamped inside the spiral groove;

[0050] A plurality of support plates 46 are installed on the surface of the transmission ring 45. The support plates 46 are evenly arranged on the outer wall of the transmission ring 45. A pair of swing rings 461 are installed on the inner wall of the support plates 46. A cleaning plate 47 is installed on the inner swing ring 461. The cleaning plate 47 is inclined and its top abuts against the inner wall of the support plate 46. A plurality of elastic rings are arranged on the surface of the cleaning plate 47, and the elastic rings are in contact with the inner wall of the arc separation plate 43. A plurality of dust suction sheets 48 are fixedly connected to the inner wall of the support plate 46. The dust suction sheets 48 are evenly arranged on the support plate 46 and can adsorb the dust in the air flow. As the transmission ring 45 rotates, the elastic ring on one side of the cleaning plate 47 can be squeezed against the inner wall of the arc separation plate 43, which can clean and maintain it, reducing the dust adsorbed on its surface. The cleaned dust can be adsorbed on the dust suction sheet 48 during the movement along the cleaning action, which can play a collecting role. At the same time, during the extrusion of the cleaning plate 47 and the arc separation plate 43, it can push one side of the cleaning plate 47 to be squeezed against the surface of the dust suction sheet 48, which can compress the dust and make it clamped on the dust suction sheet 48, avoiding the situation of dust flying under the action of a strong air flow in the future and facilitating subsequent maintenance and cleaning.

[0051] As Figure 2As shown in the figure, in order to reduce air leakage during the installation process, a sealing ring 11 is installed on the outer wall of the positioning pipe 1. The cross-section of the sealing ring 11 is in a "V" shape. A plurality of support pads 12 are fixedly connected to the inner wall of the sealing ring 11. The support pads 12 are arranged in a uniform array on the inner wall of the sealing ring 11. The support pads 12 are annular and elastic. During the installation process, the sealing ring 11 can fit on the inner wall of the air outlet, playing an auxiliary sealing role, reducing the air leakage caused by gaps at the connection due to depressions on the wall of the air outlet pipe, thereby increasing noise. And under the action of the support pads 12, the stability of the seal can be ensured, avoiding the influence of air pressure changes caused by air flow during use on the sealing effect.

[0052] Working principle: First, when it is necessary to screen the air flow discharged by the circulation fan, the positioning pipe 1 can be clamped on the air outlet, and the dust can be effectively reduced from entering the room by means of the diversion pipe 3 and the dust blocking mechanism 4. During the installation process, the sealing ring 11 can be clamped on the inner wall of the air outlet. With the help of the support pads 12, a sealing effect can be achieved, reducing air leakage caused by depressions on the inner wall of the air outlet during the installation process. During the installation process, when the limit bolt is inserted into the outer wall of the air outlet, it can squeeze the buffer pressing plate 23, so that it pushes the compression ring 22 to fit on the outer wall of the air outlet, enabling the positioning pipe 1 to have a buffer component during the installation process, reducing the noise generated by vibration during the subsequent air outlet process.

[0053] Then, when the air flow passes through the diversion pipe 3, the direction of the air flow can be changed. When the air flow passes through the adsorption shaft 35, the role of impurity adsorption can be played, reducing the dust residue in the air flow discharged from the ventilator. And with the action of the air flow, it can drive the baffle 32 to move. Under the action of the transmission belt 37 and the rubber shaft, the transmission pipe 34 can be pulled to move, so that the adsorption shaft 35 moves, and the dust on the surface of the adsorption shaft 35 can be squeezed and adhered to the grid on the inner part of the air guide ring, playing a role of collection. And during the movement of the transmission pipe 34, it can be squeezed between it and the fixed ring 36, stretching the adsorption shaft 35, adsorbing and separating large particle dust in the air flow, facilitating the connection between the adsorption shaft 35 and the air guide ring for subsequent unified cleaning. And when cleaning is required after disassembly, the rotary disk 33 can be rotated, so that the movable ring pulls the transmission belt 37 and the rubber shaft to move in the reverse direction, and the internal connected dust and impurities can be quickly cleaned with the cooperation of water flow, facilitating subsequent disassembly and maintenance.

[0054] Finally, when the air flow enters the inside of the dust shielding mechanism 4, under the action of the air flow, the arc-shaped separation plate 43 can be pushed to move. The transmission rod 44 can move inside the transmission ring 45. Under the combined action of the spiral groove and the guide shaft, the transmission ring 45 can reciprocate, and the cleaning plate 47 can intermittently clean the inside of the arc-shaped separation plate 43, reducing the situation of blockage caused by dust accumulation. Moreover, the dust falling off during cleaning can accumulate on the dust suction piece 48 along the air flow. And as the cleaning plate 47 deforms, it can squeeze the residual dust on the dust suction piece 48, enhancing the collection function and avoiding the situation where the dust floats in the dust shielding mechanism 4 along the air flow.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filtering dust collection device for a circulating ventilator, characterized in that: include, A positioning tube (1), the positioning tube (1) being used to be clamped at an air outlet of a ventilator; A limiting pressure plate (2), the limiting pressure plate (2) being arranged at one end of the positioning tube (1), and a sealing gasket ring being arranged on the inner wall of the limiting pressure plate (2) close to the air outlet, for limiting and buffering during installation; A flow guide pipe (3), the flow guide pipe (3) being clamped inside the positioning pipe (1), and the flow guide pipe (3) being used for guiding and transmitting the internal airflow; A dust blocking mechanism (4), wherein the dust blocking mechanism (4) is clamped inside the limiting pressure plate (2), and the dust blocking mechanism (4) is used to separate dust and debris remaining in the airflow to facilitate subsequent collection and cleaning.

2. The filtering dust collecting device for a circulating ventilator according to claim 1, characterized in that: A plurality of buffer pressure plates (23) are mounted on one end of the limit pressure plate (2), a bolt groove is provided on the top of the buffer pressure plate (23), and the buffer pressure plate (23) is in a "J" shape. A plurality of fixing plates (21) are mounted on the side wall of the limit pressure plate (2), and the fixing plates (21) are located directly below the buffer pressure plate (23), and a straight groove is provided on the fixing plates (21).

3. The filtering dust collecting device for a circulating ventilator according to claim 2, characterized in that: A compression ring (22) is installed at one end of the fixing plate (21); the compression ring (22) is elastic; the compression ring (22) is located at the bottom of one end of the buffer pressure plate (23); and the buffer pressure plate (23) can abut against the top of the compression ring (22).

4. The filtering dust collecting device for a circulating ventilator according to claim 1, characterized in that: The two ends of the guide tube (3) are outwardly expanded. A plurality of welding plates (31) are provided on one side of the guide tube (3). The welding plates (31) are arranged on the guide tube (3) in a uniform array. A plurality of transmission tubes (34) are provided on the inner wall of the air inlet side of the guide tube (3). The position of the transmission tube (34) corresponds to the welding plate (31). An air guide ring is installed at one end of the transmission tube (34), and a plurality of grid sheets are provided on the inner wall of the air guide ring. An adsorption shaft (35) is installed between the transmission tubes (34). The transmission tube (34) is elastic and has a pair of rubber ropes fixedly connected on the surface. A transmission belt (37) is provided on one end of the rubber shaft. A docking plate (311) is installed at the bottom of the welding plate (31). The transmission belt (37) and the rubber shaft are both movably clamped in the gap between the docking plate (311) and the welding plate (31). A support rod is fixedly connected to the welding plate (31), and a plurality of fixing rings (36) are provided on the support rod. A clamping groove is provided on the transmission tube (34), and the fixing ring (36) is arranged inside the clamping groove.

5. The filtering dust collecting device for a circulating ventilator according to claim 4, characterized in that: A blocking plate (32) is provided on the air inlet side of the air guide pipe (3), a ring groove is provided on the side wall of the blocking plate (32), and a movable ring is provided inside the ring groove, one end of the transmission belt (37) is movably clamped on the surface of the movable ring, a plurality of arc grooves are provided on the blocking plate (32), and a rotating disk (33) is rotatably provided inside the arc groove, one end of the rotating disk (33) passes through the arc groove and is clamped on the movable ring, and the blocking plate (32) can pull the transmission belt (37) to move under the action of airflow, thereby playing a role in assisting dust removal.

6. The filtering dust collecting device for a circulating ventilator according to claim 1, characterized in that: The dust blocking mechanism (4) comprises a mounting ring (41), a fixed screen plate (42) and an arc separation plate (43); the mounting ring (41) is mounted inside the limiting pressure plate (2); the fixed screen plate (42) and the arc separation plate (43) are both clamped inside the mounting ring (41); the arc separation plate (43) is elastic and one end of the arc separation plate (43) is attached to one side of the fixed screen plate (42); a plurality of fixed buckle plates (411) are mounted on the mounting ring (41); a plurality of latch rods are movably inserted at the bottom of the fixed buckle plates (411), and the latch rods are clamped on the outer wall of the fixed screen plate (42); A connecting plate is installed on the inner wall of the arc separation plate (43), and a transmission rod (44) is installed on the connecting plate. A spiral groove is provided on the transmission rod (44).

7. The filtering dust collecting device for a circulating ventilator according to claim 6, characterized in that: An annular groove is provided on the inner wall of the fixed screen plate (42), and a reset ring (451) is clamped inside the annular groove. A plurality of fixed shafts are mounted on one end of the reset ring (451), and a transmission ring (45) is provided on one side of the fixed shaft. A guide shaft is provided inside the transmission ring (45), and the guide shaft is clamped inside the spiral groove. A plurality of support plates (46) are installed on the surface of the transmission ring (45), and the support plates (46) are evenly arranged on the outer wall of the transmission ring (45). A pair of swing rings (461) are installed on the inner wall of the support plate (46), and a cleaning plate (47) is installed on the inner side of the swing ring (461). The cleaning plate (47) is inclined and the top thereof abuts against the inner wall of the support plate (46). A plurality of elastic rings are provided on the surface of the cleaning plate (47), and the elastic rings are in contact with the inner wall of the arc separation plate (43). A plurality of dust collecting sheets (48) are fixedly connected to the inner wall of the support plate (46), and the dust collecting sheets (48) are evenly arranged on the support plate (46) and can absorb dust in the airflow.

8. The filtering dust collecting device for a circulating ventilator according to claim 1, characterized in that: A sealing ring (11) is installed on the outer wall of the positioning tube (1), the cross section of the sealing ring (11) is in a "V" shape, and a plurality of supporting pads (12) are fixedly connected to the inner wall of the sealing ring (11), the supporting pads (12) are arranged in a uniform array on the inner wall of the sealing ring (11), and the supporting pads (12) are annular and elastic.

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