CN118767550A - Dust collecting box with filtering and anti-blocking functions - Google Patents

Abstract

The invention discloses a dust box with a filtering and anti-blocking function, which belongs to the technical field of dust boxes, and comprises a collecting box which is stably placed above the ground, wherein a treatment box is fixedly arranged at the upper end of the collecting box, and an air inlet pipe and an air outlet pipe are respectively fixedly arranged at the lower part and the upper part of the treatment box; further comprises: the first fixing ring is fixedly arranged on the inner wall of the upper part of the treatment box, the inner side of the first fixing ring is rotationally connected with a rotating seat, and a dust filtering assembly is arranged on the rotating seat; the first rubber sheet is fixedly connected between the processing box and the first fixing ring; the plug block is slidably arranged at the end part of the air inlet pipe, and the air inlet pipe is automatically plugged under the action of magnetic force; and the back blowing assembly is arranged on the inner side of the upper part of the processing box. The dust box with the filtering anti-blocking function can shake and remove dust when the dust filtering bag is blocked, and simultaneously reversely blows and washes the dust filtering bag in the shaking process, so that automatic cleaning and anti-blocking are realized.

Description

Dust collecting box with filtering and anti-blocking functions

Technical Field

The invention relates to the technical field of dust collecting boxes, in particular to a dust collecting box with filtering and anti-blocking functions.

Background Art

In the process of industrial processing and production, it is often necessary to filter and collect the generated dust and waste to avoid environmental pollution and ensure a suitable production environment. Therefore, a dust collection box is needed to filter and collect dust.

In the prior art, there is a kind of omnidirectional negative pressure adsorption dust collecting box with publication number CN112973297A, which includes a dust collecting box with an upper opening. When the dust bag is contained in the cavity, air is inflated into the rubber sealing edge so that the rubber sealing edge expands and deforms to fill and seal between the dust collecting box and the dust collecting bag. At this time, a sealed cavity is formed between the dust collecting bag and the inside of the dust collecting box. There are water and air in the cavity inside the dust collecting box. When the air in the cavity is sucked out, negative pressure is generated. The negative pressure suction force is transmitted to the surface of the dust collecting bag through the first hole and the second hole, and the bottom and the surrounding of the dust collecting bag are adsorbed and fixed, thereby supporting the dust collecting bag. At this time, there is only water in the cavity, which is filled between the dust collecting box and the dust collecting bag. The water can be in good contact with the outer surface of the dust collecting bag. The water and the outer surface of the dust collecting bag are attracted to each other to stabilize the dust collecting bag. When external dust enters the dust collecting bag, the dust collecting bag is not easy to swing, and the dust in the dust collecting bag is not easy to be lifted up and refluxed for the second time.

Another example is a dust collecting box with air jet vibration and dust removal, with publication number CN108926935A, comprising a box body, a filter element installed in the box body, the filter element is cylindrical, a folded filter membrane surrounds the outer periphery of the filter element, a dust vibration paddle and an air pipe nozzle are provided below the filter element, the dust vibration paddle is elastic, the dust vibration paddle extends into the gap between the filter membranes, one end of the filter element faces the centrifugal impeller, and the other end is connected to the dust vibration drive sprocket, a dust vibration drive flange is provided between the dust vibration drive sprocket and the filter element, the dust vibration drive flange can move axially along the length direction of the box body, a dust vibration motor and a motor sprocket driven by the dust vibration motor are fixed to one side of the box body, and the motor sprocket and the dust vibration drive sprocket are connected by a transmission chain. The mechanical dust vibration is accompanied by pulse jet recoil cleaning of the dust on the filter element, thereby extending the service life and use effect of the filter element;

Another example is an industrial dust collector with automatic dust cleaning function, which is disclosed in CN117679870A. It involves the field of dust collectors and includes a dust collecting shell, a filter cartridge is arranged in the dust collecting shell, a dust collecting box is arranged in the dust collecting shell, a dust collecting box has a dust falling hole on the top, and dust on the filter cartridge can fall into the dust collecting box through the dust falling hole; a blocking component is arranged at the dust falling hole of the dust collecting box, and when the dust collecting box is moved out of the dust collecting shell, the blocking component can block the dust falling hole; one side of the dust collecting box is also fixedly connected with a dumping pipe. The closing plate can close the end of the dumping pipe to prevent the dust in the dust collecting box from floating out through the dumping pipe, the operating component can clamp the processing bag at the end of the dumping pipe with the clamping plate, and the operating component can also open the closing plate to facilitate dumping the dust in the dust collecting box into the processing bag, and at the same time prevent the dust from floating during the dumping process, prevent the dust from polluting the environment, and protect the health of the processing personnel.

The existing dust collection box is not convenient for automatically cleaning the blocked filter in multiple ways during use, so the user needs to regularly check and manually clean the filter components inside the box, which increases the workload and reduces the dust collection and purification effect, and has certain usage defects.

Summary of the invention

The object of the present invention is to provide a dust box with filtering and anti-blocking functions, so as to solve the problem raised by the above background technology that the dust boxes on the market currently are not convenient to automatically clean the blocked filters in multiple ways during use, so that users need to regularly check and manually clean the filter components inside the box, which increases the workload and also reduces the dust collection and purification effect.

To achieve the above object, the present invention provides the following technical solution: a dust collecting box with filtering and anti-blocking function, comprising a collecting box stably placed above the ground, a processing box fixedly installed on the upper end of the collecting box, and an air inlet pipe and an exhaust pipe fixedly installed on the lower part and the upper part of the processing box respectively;

It also includes: a first fixing ring fixedly mounted on the upper inner wall of the processing box, the inner side of the first fixing ring is rotatably connected to a rotating seat, and a dust filter assembly is mounted on the rotating seat;

A first rubber sheet, fixedly connected between the processing box and the first fixing ring;

The rotary valve is fixedly installed at the lower end of the processing box to discharge the filtered dust;

A second fixing ring is fixedly mounted on the lower inner wall of the processing box, a guide column is symmetrically fixedly mounted on the lower surface of the second fixing ring, and a bracket is lifted and lowered on the outer side of the guide column, and a magnetic block is fixedly connected to the lower end of the bracket;

The plug is slidably mounted on the end of the air intake pipe and automatically blocks the air intake pipe through magnetic force;

The backflush assembly is installed on the upper inner side of the processing box to achieve blowing and clearing of the dust filter assembly.

Preferably, the dust filter assembly includes a ventilation pipe that is uniformly penetrated and installed on the rotating seat, and the lower end of the ventilation pipe is connected to a dust filter bag, and the upper part of the dust filter bag is threadedly connected to the lower end of the ventilation pipe.

By adopting the above technical solution, the dust filter bag can be easily disassembled by rotating the upper part of the dust filter bag, which is convenient for subsequent replacement and maintenance of the dust filter bag.

Preferably, the lower end of the processing box is connected to the collecting box via a rotary valve, and a dust collecting drawer is pull-out and installed inside the collecting box, and the rotary valve and the dust collecting drawer are arranged correspondingly up and down.

By adopting the above technical solution, the dust filtered out of the processing box will fall to the lower end of the processing box and enter the collection box through the rotary valve, so as to be centrally collected through the dust collection drawer, which is convenient for subsequent processing of the filtered dust.

Preferably, the first rubber sheet is arranged in an annular structure, and the upper end of the first rubber sheet is sealed and fixedly connected to the lower end surface of the rotating seat, and the lower end of the first rubber sheet is sealed and fixedly connected to the inner wall of the processing box, and the first rubber sheet is twisted.

By adopting the above technical solution, when the dust filter bag is blocked and its ventilation effect becomes poor, the air pressure between the dust filter bag and the processing box increases, so that the first rubber sheet expands due to the air pressure.

Preferably, a first spring is connected between the first fixing ring and the rotating seat, and the rotating seat forms an elastic rotating structure through the first spring and the first fixing ring.

By adopting the above technical solution, when the first rubber sheet is deformed under the action of air pressure to eliminate wrinkles, it will drive the rotating seat at its upper end to rotate synchronously, so that the rotating seat can automatically rotate elastically.

Preferably, the bracket is fixedly mounted on the lower ends of the plurality of dust filter bags, and a second spring is connected between the bracket and the second fixing ring, and the second spring is sleeved on the outside of the guide column, and the bracket is elastically raised and lowered and adjusted on the outside of the guide column.

By adopting the above technical solution, when the rotating seat rotates, it can twist the dust filter bag, so that the dust blocks attached to the outside of the dust filter bag become loose and fall off. At the same time, during the twisting process of the dust filter bag, the bracket connected to its lower end will be pulled to elastically move upward along the guide column. When the bracket is subsequently reset, it will pull the dust filter bag to shake, thereby promoting the cleaning of the dust filter bag.

Preferably, the lower end of the bracket is fixedly connected to a magnetic block, and the right end of the plug is made of magnetic material, and the plug is slidably installed on the right end of the intake pipe. At the same time, the plug is located outside the movement trajectory of the magnetic block, and the magnetic block attracts the plug by magnetic force during the upward movement of the bracket.

By adopting the above technical solution, when the dust filter bag is blocked and the bracket moves upward, the magnetic block at the lower end of the bracket can be brought close to the blocking block to attract it magnetically.

Preferably, the plug is arranged in a truncated cone-shaped structure, and a return spring is connected between the plug and the air intake pipe, and the plug moves under the action of magnetic force to realize automatic blocking of the air intake pipe.

By adopting the above technical solution, the magnetic block is brought close to the plug block during the upward movement, so that the plug block can slide elastically under the magnetic force, thereby achieving temporary blocking of the air intake of the intake pipe.

Preferably, the backflush assembly includes a turntable rotating on the inner side of the upper portion of the processing box, and air ducts are evenly and fixedly installed on the turntable, and the positions of the lower end of the air duct and the ventilation duct are arranged correspondingly up and down, and the gas is discharged through the air duct to facilitate the subsequent backflushing and cleaning of the dust filter bag. At the same time, the air duct in the middle position and the ventilation duct in the middle position are fixedly connected.

By adopting the above technical solution, when the rotating seat moves, it will drive the air duct to rotate synchronously through the ventilation duct and the air duct.

Preferably, a guide block is fixedly installed on the upper surface of the turntable, and the guide block is made of waterproof material, and a resistance rod is arranged above the turntable, and the resistance rod fits against the inclined surface of the guide block during rotation, and at the same time, a fixed cylinder is fixedly arranged on the inner wall of the upper end of the processing box, and the lower end of the fixed cylinder is telescopically connected with a telescopic rod, and a second rubber sheet is sealed and connected between the telescopic rod and the inner wall of the processing box.

By adopting the above technical solution, when the turntable rotates, the abutment rod will fit the inclined surface of the guide block, so that the fixed tube and the telescopic rod can be telescopically adjusted.

Compared with the prior art, the beneficial effects of the present invention are: the dust collecting box with filtering and anti-blocking function can shake the dust filter bag to remove dust when it is blocked, and at the same time, the dust filter bag is reversely blown and flushed during the shaking process to achieve automatic cleaning and anti-blocking. The specific contents are as follows;

1. A dust filter bag and a first rubber sheet are provided. When the dust filter bag is clogged, the ventilation volume is reduced, so that the air pressure between the processing box and the first rubber sheet increases. At this time, the first rubber sheet will expand, so that the wrinkles of the first rubber sheet will unfold. At this time, the first rubber sheet can drive the rotating seat to rotate elastically. At this time, the rotating seat can twist the dust filter bag, so that the dust blocks attached to the outside of the dust filter bag are broken and dropped, so as to achieve preliminary filtration;

2. A second fixing ring and a bracket are provided. When the rotating seat drives the dust filter bag to rotate and twist during rotation, the lower end of the dust filter bag will drive the bracket to elastically rise along the guide column. When the rotating seat is reset, the bracket will elastically shake under the elastic force of the second spring, thereby further promoting the falling of dust outside the dust filter bag and realizing auxiliary clearing.

3. A magnetic block and a plug are provided. As the bracket moves upward, the magnetic block on the outside will move upward synchronously and gradually approach the air inlet pipe, and the plug will move elastically under the action of the magnetic force, thereby temporarily blocking the air inlet pipe, thereby preventing the air inlet pipe from continuously inhaling air and affecting the shaking off of dust on the outside of the dust filter bag;

4. A turntable, an air duct and a second rubber sheet are provided. When the air intake duct stops intake, the rotating seat will elastically rotate and reset under the elastic force of the first spring, and when the turntable rotates synchronously, the guide block on its upper surface will push the resistance rod to move up and down. At the same time, the second rubber sheet will be reciprocated and stretched and reset under the drive of the resistance rod, so that the second rubber sheet can transport air into the air duct, so that the air duct can intermittently blow air into the dust filter bag to achieve reverse impact, thereby further improving the cleaning and anti-blocking of the dust filter bag.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

FIG2 is a schematic cross-sectional view of the structure of the present invention;

FIG3 is a schematic diagram of the connection structure between the first fixing ring and the rotating seat of the present invention;

FIG4 is a schematic diagram of the installation structure of the first rubber sheet of the present invention;

FIG5 is a schematic diagram of the bracket installation structure of the present invention;

FIG6 is a schematic diagram of the installation structure of the magnetic block and the plug block of the present invention;

7 is a schematic cross-sectional view of the upper part of the processing box of the present invention;

FIG. 8 is a schematic diagram of the second rubber sheet installation structure of the present invention.

In the figure: 1. collecting box; 2. processing box; 3. air inlet pipe; 4. exhaust pipe; 5. first fixing ring; 6. rotating seat; 7. ventilation pipe; 8. dust filter bag; 9. first rubber sheet; 10. rotary valve; 11. dust collection drawer; 12. first spring; 13. second fixing ring; 14. guide column; 15. bracket; 16. second spring; 17. magnetic block; 18. plug block; 19. reset spring; 20. turntable; 21. air guide pipe; 22. guide block; 23. fixing cylinder; 24. telescopic rod; 25. resistance rod; 26. second rubber sheet.

DETAILED DESCRIPTION

Embodiment 1: Please refer to FIG. 1 to FIG. 6. During use, it is inconvenient to automatically clean the filter mechanism of the existing dust collecting box, resulting in low filtering effect after blockage. In order to solve this technical problem, this embodiment discloses the following technical contents;

A dust collecting box with filtering and anti-blocking functions, comprising a collecting box 1 stably placed above the ground, a processing box 2 fixedly mounted on the upper end of the collecting box 1, and an air inlet pipe 3 and an exhaust pipe 4 fixedly mounted on the lower part and the upper part of the processing box 2 respectively;

It also includes: a first fixed ring 5, fixedly mounted on the upper inner wall of the processing box 2, the inner side of the first fixed ring 5 is rotatably connected to a rotating seat 6, and a dust filter assembly is installed on the rotating seat 6; a first rubber sheet 9, fixedly connected between the processing box 2 and the first fixed ring 5; a rotary valve 10, fixedly mounted on the lower end of the processing box 2, to discharge the filtered dust;

The second fixing ring 13 is fixedly mounted on the lower inner wall of the processing box 2, and the guide pillars 14 are symmetrically fixedly mounted on the lower surface of the second fixing ring 13, and the outer side of the guide pillars 14 is provided with a bracket 15 for lifting, and the lower end of the bracket 15 is fixedly connected with a magnetic block 17; the plug 18 is slidably mounted on the end of the intake pipe 3, and the intake pipe 3 is automatically blocked by magnetic force;

The dust filter assembly includes a ventilation pipe 7 uniformly penetrating and installed on the rotating seat 6, and a dust filter bag 8 is connected to the lower end of the ventilation pipe 7, and the upper part of the dust filter bag 8 is threadedly connected to the lower end of the ventilation pipe 7.

The lower end of the processing box 2 is connected to the collection box 1 through a rotary valve 10, and a dust collection drawer 11 is installed on the inner side of the collection box 1, and the rotary valve 10 and the dust collection drawer 11 are arranged correspondingly up and down;

The first rubber sheet 9 is arranged in an annular structure, and the upper end of the first rubber sheet 9 is sealed and fixedly connected to the lower end surface of the rotating seat 6, and the lower end of the first rubber sheet 9 is sealed and fixedly connected to the inner wall of the processing box 2, and the first rubber sheet 9 is twisted. A first spring 12 is connected between the first fixed ring 5 and the rotating seat 6, and the rotating seat 6 forms an elastic rotating structure through the first spring 12 and the first fixed ring 5.

A first spring 12 is connected between the first fixed ring 5 and the rotating seat 6 , and the rotating seat 6 forms an elastic rotating structure through the first spring 12 and the first fixed ring 5 .

The bracket 15 is fixedly mounted on the lower ends of the plurality of dust filter bags 8 , and a second spring 16 is connected between the bracket 15 and the second fixing ring 13 , and the second spring 16 is sleeved on the outside of the guide column 14 , while the bracket 15 is elastically raised and lowered and adjusted on the outside of the guide column 14 .

The lower end of the bracket 15 is fixedly connected with a magnetic block 17, and the right end of the plug 18 is a magnetic material, and the plug 18 is slidably installed on the right end of the intake pipe 3. At the same time, the plug 18 is located outside the movement trajectory of the magnetic block 17, and the magnetic block 17 attracts the plug 18 by magnetic force during the upward movement of the bracket 15.

The plug 18 is in a truncated cone shape, and a return spring 19 is connected between the plug 18 and the air intake pipe 3 . The plug 18 moves under the action of magnetic force to achieve automatic blocking of the air intake pipe 3 .

By adopting the above technical solution, the air inlet pipe 3 inputs the dust-containing air into the processing box 2, so that the dust-containing air passes through the dust filter bag 8 for filtering and is discharged through the exhaust pipe 4, and the dust filtered out of the outside of the dust filter bag 8 falls into the collection box 1 through the rotary valve 10 and is collected by the dust collection drawer 11. When the outside of the dust filter bag 8 is clogged due to excessive dust, the ventilation rate of the dust filter bag 8 is reduced, so that the air pressure between the processing box 2 and the first rubber sheet 9 increases, causing the first rubber sheet 9 to deform. At this time, the folds on the first rubber sheet 9 gradually flatten, and at the same time, the first rubber sheet 9 drives the rotating seat 6 to rotate elastically during the deformation process, and the rotating seat 6 rotates during the rotation process. The dust filter bag 8 will be driven to rotate, and the dust filter bag 8 will be twisted during the rotation, so that the dust blocks on the outside thereof will be loosened. As the dust filter bag 8 is twisted, the lower end of the dust filter bag 8 will drive the bracket 15 to elastically rise and fall along the guide column 14. As the bracket 15 moves upward, the magnetic block 17 below it will gradually approach the air intake pipe 3. When the plug 18 elastically slides under the action of the magnetic force, the air intake pipe 3 can be blocked, so that the air intake pipe 3 stops intake. At this time, the rotating seat 6 will be elastically rotated and reset under the elastic force of the first spring 12, so that the bracket 15 can be moved down and reset, so as to shake the dust filter bag 8, thereby realizing dust removal and unblocking when the dust filter bag 8 is mechanically vibrated.

Embodiment 2: The technical content disclosed in this embodiment is a further improvement made on the basis of the above-mentioned embodiment 1. At present, when the existing dust collecting box performs pulse cleaning, it is necessary to use a separate power air source for blowing pulses. In order to further solve this technical problem, this embodiment discloses the following technical content, as shown in Figures 2-3 and Figures 7-8;

The back-blowing assembly is installed on the upper inner side of the treatment box 2, and is used to blow and clear the dust filter assembly. The back-blowing assembly includes a turntable 20 that rotates on the upper inner side of the treatment box 2, and the turntable 20 is evenly penetrated and fixed with an air duct 21, and the lower end of the air duct 21 and the position of the vent 7 are arranged correspondingly up and down, and the gas is discharged through the air duct 21, which is convenient for the subsequent backwashing and cleaning of the dust filter bag 8. At the same time, the air duct 21 in the middle position is fixedly connected to the vent 7 in the middle position. A guide block 22 is fixedly installed on the upper surface of the turntable 20, and the guide block 22 is made of waterproof material, and a resistance rod 25 is arranged above the turntable 20, and the resistance rod 25 is attached to the inclined surface of the guide block 22 during rotation, and a fixed cylinder 23 is fixedly arranged on the inner wall of the upper end of the treatment box 2, and the lower end of the fixed cylinder 23 is telescopically connected with a telescopic rod 24, and a second rubber sheet 26 is sealed between the telescopic rod 24 and the inner wall of the treatment box 2.

By adopting the above technical solution, as the rotating seat 6 is reset and rotated, the ventilation pipe 7 on the rotating seat 6 will drive the air duct 21 and the turntable 20 to rotate through the frame. At this time, the guide block 22 on the turntable 20 will contact the lower end of the resistance rod 25, so that the lower end of the resistance rod 25 can slide along the inclined surface of the guide block 22, so that the resistance rod 25 can drive the telescopic rod 24 and the fixed tube 23 to perform telescopic adjustment. At this time, the second rubber sheet 26 can be reciprocated and reset, so that the second rubber sheet 26 can intermittently blow air toward the inner side of the dust filter bag 8 through the air duct 21, so as to complete the reverse blowing cleaning of the dust filter bag 8, and realize further cleaning and anti-blocking of the dust filter bag 8.

The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims (10)

1. A dust collecting box with filtering and anti-blocking functions, comprising a collecting box (1) stably placed above the ground, a processing box (2) fixedly mounted on the upper end of the collecting box (1), and an air inlet pipe (3) and an air outlet pipe (4) fixedly mounted on the lower part and the upper part of the processing box (2) respectively; It is characterized by further comprising: A first fixed ring (5) is fixedly mounted on the upper inner wall of the processing box (2); the inner side of the first fixed ring (5) is rotatably connected to a rotating seat (6), and a dust filter assembly is mounted on the rotating seat (6); A first rubber sheet (9) is fixedly connected between the processing box (2) and the first fixing ring (5); The rotary valve (10) is fixedly mounted on the lower end of the processing box (2) to discharge the filtered dust; A second fixing ring (13) is fixedly mounted on the lower inner wall of the processing box (2); a guide column (14) is symmetrically fixedly mounted on the lower surface of the second fixing ring (13); a bracket (15) is provided on the outer side of the guide column (14) for lifting; and a magnetic block (17) is fixedly connected to the lower end of the bracket (15); A plug (18) is slidably mounted on the end of the air intake pipe (3) and automatically blocks the air intake pipe (3) through magnetic force; The back-blowing component is installed on the inner side of the upper part of the processing box (2) and is used to blow air and clear blockages on the dust filter component. 2. A dust collecting box with filtering and anti-blocking functions according to claim 1, characterized in that: the dust filtering assembly includes a ventilation pipe (7) that is evenly penetrated and installed on a rotating seat (6), and the lower end of the ventilation pipe (7) is connected to a dust filter bag (8), and the upper part of the dust filter bag (8) is threadedly connected to the lower end of the ventilation pipe (7). 3. A dust collecting box with filtering and anti-blocking functions according to claim 1, characterized in that: the lower end of the processing box (2) is connected to the collecting box (1) through a rotary valve (10), and a dust collecting drawer (11) is installed on the inner side of the collecting box (1), and the rotary valve (10) and the dust collecting drawer (11) are arranged correspondingly up and down. 4. A dust collecting box with filtering and anti-blocking functions according to claim 1, characterized in that: the first rubber sheet (9) is arranged in an annular structure, and the upper end of the first rubber sheet (9) is sealed and fixedly connected to the lower end surface of the rotating seat (6), and the lower end of the first rubber sheet (9) is sealed and fixedly connected to the inner wall of the processing box (2), and the first rubber sheet (9) is twisted. 5. A dust collecting box with filtering and anti-blocking functions according to claim 4, characterized in that a first spring (12) is connected between the first fixed ring (5) and the rotating seat (6), and the rotating seat (6) forms an elastic rotating structure through the first spring (12) and the first fixed ring (5). 6. A dust collecting box with filtering and anti-blocking functions according to claim 5, characterized in that: the bracket (15) is fixedly installed on the lower ends of multiple dust filter bags (8), and a second spring (16) is connected between the bracket (15) and the second fixing ring (13), and the second spring (16) is sleeved on the outside of the guide column (14), and the bracket (15) is elastically raised and lowered and adjusted on the outside of the guide column (14). 7. A dust collecting box with filtering and anti-blocking functions according to claim 6, characterized in that: the lower end of the bracket (15) is fixedly connected with a magnetic block (17), and the right end of the plug (18) is a magnetic material, and the plug (18) is slidably installed on the right end of the intake pipe (3), and at the same time the plug (18) is located outside the movement trajectory of the magnetic block (17), and the magnetic block (17) attracts the plug (18) by magnetic force during the upward movement of the bracket (15). 8. A dust collecting box with filtering and anti-blocking functions according to claim 7, characterized in that: the plug (18) is arranged in a truncated cone structure, and a return spring (19) is connected between the plug (18) and the air intake pipe (3), and the plug (18) moves under the action of magnetic force to realize automatic blocking of the air intake pipe (3). 9. A dust collecting box with filtering and anti-blocking functions according to claim 1, characterized in that: the backflush assembly includes a turntable (20) rotating on the inner side of the upper part of the processing box (2), and an air duct (21) is evenly and fixedly installed on the turntable (20), and the lower end of the air duct (21) and the position of the ventilation pipe (7) are arranged correspondingly up and down, and the gas is discharged through the air duct (21), which is convenient for the subsequent backflushing and cleaning of the dust bag (8), and at the same time, the air duct (21) in the middle position and the ventilation pipe (7) in the middle position are fixedly connected. 10. A dust collecting box with filtering and anti-blocking functions according to claim 9, characterized in that: a guide block (22) is fixedly installed on the upper surface of the turntable (20), and the guide block (22) is made of waterproof material, and a resistance rod (25) is arranged above the turntable (20), and the resistance rod (25) is in contact with the inclined surface of the guide block (22) during rotation, and at the same time, a fixed cylinder (23) is fixedly arranged on the inner wall of the upper end of the processing box (2), and the lower end of the fixed cylinder (23) is telescopically connected with a telescopic rod (24), and a second rubber sheet (26) is sealed between the telescopic rod (24) and the inner wall of the processing box (2).