Dust removal filter device with self-cleaning

Abstract

The application discloses a dust removal and filtration device with self-cleaning function and relates to the technical field of dust removal and filtration. The dust removal and filtration device comprises a ventilation pipe, a self-cleaning mechanism, a filter pipe connected to the front end of the ventilation pipe, a supporting ring arranged in the filter pipe, a filter screen fixedly connected to the inner arc surface of the supporting ring, two first supporting blocks fixedly connected to the inner wall of the filter pipe, a guide column fixedly connected between the two first supporting blocks, the guide column being slidably inserted into the filter pipe, a forward-reverse control switch fixedly connected to the filter pipe, an air outlet connected to the front end of the filter pipe, an exhaust fan arranged in the air outlet, and a bidirectional timing module arranged in the forward-reverse control switch.

Description

Technical Field

[0001] This invention relates to the field of dust removal and filtration technology, and more specifically, to a dust removal and filtration device with self-cleaning function. Background Technology

[0002] Dust removal and filtration devices are used to filter and purify dust-laden gases, separating and capturing dust particles in the airflow to achieve purified gas emission or recycling. They mainly use the porous media of the filter screen to intercept dust-laden airflow and dust particles, ultimately converting it into clean gas.

[0003] In the purification of dusty gas, when the dusty airflow continuously passes through the filter screen, the filter screen pores intercept and capture solid particles. In actual industrial high-dust working environments, as the operating time increases, the intercepted dust accumulates on the windward side of the filter screen to form a dust layer. The dust layer increases the filtration resistance and reduces the airflow, resulting in a decrease in the processing efficiency of the entire filtration process and causing the fan to overload or even burn out. To restore filtration performance, the filter screen usually needs to be disassembled and cleaned regularly. However, this disassembly and cleaning method is not only cumbersome and time-consuming, but also easily causes secondary dispersion of dust accumulated on the filter screen during disassembly and cleaning, which reduces the efficiency of cleaning operations and has an adverse impact on the hygiene of the working environment. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a dust removal and filtration device with self-cleaning function, so as to solve the problems that the filter screen is easily clogged and needs to be frequently disassembled and cleaned, the cleaning process is time-consuming, and the dust is easily dispersed, affecting the hygiene of the working environment.

[0005] To solve the above problems, the present invention adopts the following technical solution: A dust removal and filtration device with self-cleaning function includes a ventilation duct and a self-cleaning mechanism. The self-cleaning mechanism is located at the front end of the ventilation duct and includes a filter tube connected to the front end of the ventilation duct. A support ring is provided inside the filter tube, and a filter screen is fixedly connected to the inner arc surface of the support ring. Two first support blocks are fixedly connected to the inner wall of the filter tube, and a guide post is fixedly connected between the two first support blocks. The guide post is slidably inserted into the support ring. A forward and reverse rotation control switch is fixedly connected inside the filter tube. An air outlet duct is connected to the front end of the filter tube, and an exhaust fan is installed inside the air outlet duct. A bidirectional timing module is provided inside the forward and reverse rotation control switch.

[0006] Furthermore, a diversion pipe is connected to the left side of the ventilation duct, and a dust exhaust pipe is connected to the front end of the diversion pipe.

[0007] Furthermore, a first fixed baffle is fixedly connected inside the dust exhaust pipe, a second fixed baffle is fixedly connected inside the ventilation pipe, a first connecting frame is slidably inserted inside the top end of the dust exhaust pipe, a second connecting frame is slidably inserted inside the top end of the ventilation pipe, a first movable baffle is fixedly connected to the lower end of the first connecting frame, and a second movable baffle is fixedly connected to the lower end of the second connecting frame.

[0008] Furthermore, a support plate is fixedly connected to the right side of the dust exhaust pipe, a first motor is fixedly connected to the upper surface of the support plate, a first transmission gear is fixedly connected to the output shaft of the first motor, a second transmission rack is fixedly connected to the transverse arm end of the first connecting frame, and a first transmission rack is fixedly connected to the front end of the second connecting frame. Both the first and second transmission racks mesh with the first transmission gear. The forward and reverse control switch is used to control the forward and reverse rotation of the exhaust fan and the first motor.

[0009] Furthermore, a second support block is fixedly connected to the top of the filter tube, and two resistance plates are rotatably connected to the lower end of the second support block. A resistance push spring is fixedly connected to the front end between the two resistance plates.

[0010] Furthermore, a support frame is fixedly connected to the upper end of the support ring, and both resistance plates are inserted into the interior of the support frame. Two extrusion shafts are rotatably connected inside the support frame, and both resistance plates are located between the two extrusion shafts.

[0011] Furthermore, it also includes a separation mechanism, which is disposed at the rear end of the ventilation duct. The separation mechanism includes a wide air inlet pipe disposed at the rear end of the ventilation duct, and a narrow air inlet pipe is connected to the rear end of the wide air inlet pipe. A guide block is fixedly connected inside the wide air inlet pipe. The guide block has a conical structure. A support frame is fixedly connected to the rear end of the lower surface of the ventilation duct. The rear end of the support frame is fixedly connected to the surface of the wide air inlet pipe.

[0012] Furthermore, a collection ring box is provided between the air inlet duct and the ventilation duct. The collection ring box is connected to the air inlet duct and the ventilation duct through a rotary joint and is rotatably connected at the same time.

[0013] Furthermore, the front end of the collection ring box has an inclined outward convex structure.

[0014] Furthermore, a second motor is fixedly connected to the rear end of the upper surface of the ventilation pipe, and a second transmission gear is fixedly connected to the output shaft of the second motor. An external toothed ring is fixedly sleeved on the surface of the collection ring box, and the external toothed ring meshes with the second transmission gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) As dust accumulates on the surface of the filter screen, the air resistance increases. When the air pushes the filter screen beyond the upper limit of the resistance generated by the two resistance plates and the resistance push spring, the support ring and the filter screen move forward gradually until the support ring contacts and presses the forward and reverse control switch. The exhaust fan is reversed by the bidirectional timing module set inside the forward and reverse control switch, so that the external air enters the filter tube from the air outlet and passes through the filter screen in the reverse direction, blowing away most of the dust accumulated on the filter screen and achieving rapid cleaning of the dust on the filter screen. It is especially suitable for flammable and explosive dust or strong electromagnetic interference conditions. While reducing the amount of explosion-proof electrical components used, it eliminates malfunctions caused by electromagnetic interference and gives the dust removal equipment reliability under harsh conditions.

[0016] (2) When the forward and reverse control switch is pressed, the first motor drives the second moving baffle to move upward and the first moving baffle to move downward. The ventilation pipe is closed by the second fixed baffle and the second moving baffle. At the same time, the dust exhaust pipe is opened. The detached dust enters the diversion pipe with the airflow and is discharged to the designated location through the dust exhaust pipe, thereby improving the hygiene during the cleaning process.

[0017] (3) After the cleaning time of this scheme is completed, the two-way timing module controls the exhaust fan to resume forward rotation, and at the same time controls the first motor to rotate in reverse, driving the second moving baffle to move downward and the first moving baffle to move upward, opening the ventilation pipe and closing the dust exhaust pipe to continue filtering and removing dust.

[0018] (4) When air enters the wide air inlet pipe from the narrow air inlet pipe, the air and dust are dispersed towards the inner wall of the wide air inlet pipe by the guide block. Large particles of impurities carried in the airflow enter the collection ring box due to inertia. At the same time, the second motor drives the collection ring box to rotate, so that the large particles of impurities entering the collection ring box are always inside the collection ring box under the action of centrifugal force, thereby achieving the separation of large particles of impurities and preventing large particles of impurities from colliding with the filter screen and causing the filter screen to break. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the filter tube of the present invention; Figure 3 This is a schematic diagram of the resistance plate portion of the present invention; Figure 4 This is a schematic diagram of the internal structure of the dust exhaust pipe and ventilation pipe of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of the wide air inlet pipe and the narrow air inlet pipe of the present invention; Figure 7This is a schematic diagram of the internal structure of the wide and narrow air inlet pipes of the present invention.

[0020] Explanation of the labels in the diagram: 1. Ventilation duct; 201. Filter tube; 202. Air outlet duct; 203. Exhaust fan; 204. Diverter pipe; 205. Dust exhaust pipe; 206. First motor; 207. Support ring; 208. Filter screen; 209. Forward / reverse control switch; 210. Guide column; 211. Resistance plate; 212. First support block; 213. Resistance push spring; 214. Extrusion shaft; 215. Second support block; 216. Support frame; 217. First moving baffle; 218. First fixed baffle; 219. Second fixed baffle; 220. Second moving baffle; 221. First connecting frame; 222. Second connecting frame; 223. First transmission rack; 224. First transmission gear; 225. Second transmission rack; 226. Support cross plate; 301. Narrow air inlet duct; 302. Second motor; 303. Second transmission gear; 304. External gear ring; 305. Collection ring box; 306. Wide air inlet duct; 307. Rotary joint; 308. Support frame; 309. Guide block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-5A self-cleaning dust removal and filtration device includes a ventilation duct 1 and a self-cleaning mechanism. The self-cleaning mechanism is located at the front end of the ventilation duct 1 and includes a filter tube 201 connected to the front end of the ventilation duct 1. A support ring 207 is provided inside the filter tube 201. A filter screen 208 is fixedly connected to the inner arc surface of the support ring 207. To prevent dust-laden gas from escaping through the gap between the outer wall of the support ring 207 and the inner wall of the filter tube 201 during sliding, a flexible corrugated sealing skirt can be fixedly provided on the outer peripheral sidewall of the support ring 207 to ensure a low coefficient of sliding friction while guaranteeing airflow sealing. Two first support blocks 212 are fixedly connected to the inner wall of the filter tube 201, and a guide post 210 is fixedly connected between the two first support blocks 212. The guide post 210 and the support ring 207 are slidably inserted inside. A forward / reverse control switch 209 is fixedly connected inside the filter tube 201. The front end of the filter tube 201 is connected to the air outlet 202. An exhaust fan 203 is installed inside the air outlet 202. A bidirectional timing module is set inside the forward / reverse control switch 209. The forward / reverse control switch 209 is a mechanical micro-motion limit switch. Its electrical signal output terminal is electrically connected to the trigger terminal of the internal bidirectional timing module. The bidirectional timing module has two independent timing signal output terminals, which are electrically connected to the frequency conversion drive circuit of the exhaust fan 203 and the reversing relay of the first motor 206, respectively. After the limit switch is pressed and triggered, the bidirectional timing module controls the exhaust fan 203 and the first motor 206 to reverse and reset after a delay.

[0023] The ventilation pipe 1 is connected to a diversion pipe 204 on its left side. The front end of the diversion pipe 204 is connected to a dust exhaust pipe 205. A first fixed baffle 218 is fixedly connected inside the dust exhaust pipe 205. A second fixed baffle 219 is fixedly connected inside the ventilation pipe 1. A first connecting frame 221 is slidably inserted inside the top end of the dust exhaust pipe 205. A second connecting frame 222 is slidably inserted inside the top end of the ventilation pipe 1. A first movable baffle 217 is fixedly connected to the lower end of the first connecting frame 221. A second movable baffle 220 is fixedly connected to the lower end of the second connecting frame 222.

[0024] The dust exhaust pipe 205 is fixedly connected to a support plate 226 on its right side. A first motor 206 is fixedly connected to the upper surface of the support plate 226. A first transmission gear 224 is fixedly connected to the output shaft of the first motor 206. A second transmission rack 225 is fixedly connected to the transverse arm end of the first connecting frame 221. A first transmission rack 223 is fixedly connected to the front end of the second connecting frame 222. Both the first transmission rack 223 and the second transmission rack 225 mesh with the first transmission gear 224. The forward and reverse control switch 209 is used to control the forward and reverse rotation of the exhaust fan 203 and the first motor 206.

[0025] The filter tube 201 has a second support block 215 fixedly connected to its inner top end. Two resistance plates 211 are rotatably connected to the lower end of the second support block 215. A resistance push spring 213 is fixedly connected to the front end between the two resistance plates 211. A support frame 216 is fixedly connected to the upper end of the support ring 207. Both resistance plates 211 are inserted into the interior of the support frame 216. Two extrusion shafts 214 are rotatably connected inside the support frame 216. The two resistance plates 211 are located between the two extrusion shafts 214, and the two resistance plates 211 are distributed in a gradually expanding V-shaped structure. When the filter screen 208 is pushed forward by an overloaded airflow, it causes the support frame 216 and the two extrusion shafts 214 inside to move forward synchronously. During the forward movement, the extrusion shafts 214 slide along the outer inclined surface of the V-shaped resistance plates 211, forcing the two resistance plates 211 to contract radially, thereby overcoming the elastic force of the front resistance push spring 213. This structure, through inclined plane compression, converts the forward linear thrust of the filter screen 208 into the force required to compress the spring.

[0026] By adopting the above technical solution, when removing dust from the air, the exhaust fan 203 draws air into the ventilation pipe 1 and then into the filter pipe 201, allowing the air to pass through the filter screen 208, while the dust in the air can be intercepted by the filter, thereby achieving the filtration and separation of dust in the air.

[0027] As the filter 208 filters dust over a long period of time, dust gradually accumulates on its surface, increasing the resistance to airflow and reducing efficiency. The two resistance plates 211 and the resistance push spring 213 generate resistance, which can prevent the filter 208 from moving forward when the normal airflow resistance is low. However, when dust accumulates on the surface of the filter 208, increasing the airflow resistance and causing the air pressure on the filter 208 to exceed the upper resistance limit set by the two resistance plates 211 and the resistance push spring 213, the support ring 207 and the filter 208 gradually move forward until the support ring 207 contacts and is pressed against the forward / reverse control switch 209. Since the forward / reverse control switch 209 has a bidirectional timing module that can trigger the exhaust fan 203 to reverse with a single button, external air enters the filter tube 201 from the air outlet 202, allowing the air to pass through the filter 208 in the opposite direction. This blows away most of the dust accumulated on the filter 208, thus achieving rapid cleaning of the dust on the filter 208.

[0028] When the forward / reverse control switch 209 is pressed, the first motor 206 can be controlled to drive the first transmission gear 224 to rotate, thereby driving the first transmission rack 223 and the second transmission rack 225 to move upward and downward respectively, thereby driving the second moving baffle 220 to move upward and the first moving baffle 217 to move downward. The ventilation pipe 1 can be closed by the second fixed baffle 219 and the second moving baffle 220, while the dust exhaust pipe 205 is opened. In order to ensure the airtightness of the main ventilation pipe during the backflushing dust removal operation and prevent secondary dust, flexible rubber sealing gaskets are embedded at the joint between the upper edge of the second moving baffle 220 and the lower edge of the second fixed baffle 219. When the first motor 206 drives the second moving baffle 220 to rise to its limit position, the flexible rubber sealing gasket is compressed and deformed, achieving a tight seal of the ventilation pipe 1 section. At this time, the detached dust can enter the diversion pipe 204 with the airflow and be discharged to the designated location through the dust exhaust pipe 205, thereby improving the hygiene during the cleaning process. After a certain period of cleaning is completed, the bidirectional timing module controls the exhaust fan 203 to resume forward rotation, and at the same time controls the first motor 206 to rotate in the opposite direction, driving the second moving baffle 220 to move downward and the first moving baffle 217 to move upward. The ventilation pipe 1 opens and the dust exhaust pipe 205 closes, so that filtration and dust removal can continue. The bidirectional timing module in this solution is a common method in the prior art, and will not be described in detail here.

[0029] like Figure 6 and Figure 7 As shown, it also includes a separation mechanism, which is disposed at the rear end of the ventilation duct 1. The separation mechanism includes a wide air inlet pipe 306 disposed at the rear end of the ventilation duct 1. The rear end of the wide air inlet pipe 306 is connected to a narrow air inlet pipe 301. A guide block 309 is fixedly connected inside the wide air inlet pipe 306. The guide block 309 has a conical structure. A support frame 308 is fixedly connected to the rear end of the lower surface of the ventilation duct 1. The rear end of the support frame 308 is fixedly connected to the surface of the wide air inlet pipe 306. A collection ring box 305 is installed between the air inlet wide pipe 306 and the ventilation pipe 1. The collection ring box 305 is connected to both the air inlet wide pipe 306 and the ventilation pipe 1 via a rotary joint 307, and is rotatably connected. The front end of the collection ring box 305 has an inclined outward convex structure. To ensure the long-term stable operation of the dust removal device and form a closed-loop discharge, a drain port is provided on the bottom outer wall of the collection ring box 305. The drain port is detachably threaded with a sealing end cap or equipped with a normally closed drain solenoid valve. When the equipment is shut down for cleaning and maintenance, the sealing end cap can be opened to discharge large particles of impurities accumulated inside the collection ring box 305.

[0030] The upper surface of the ventilation pipe 1 is fixedly connected to the rear end of the second motor 302, the output shaft of the second motor 302 is fixedly connected to the second transmission gear 303, and the surface of the collection ring box 305 is fixedly fitted with an external toothed ring 304, which meshes with the second transmission gear 303.

[0031] By adopting the above technical solution, during the air filtration process, the air first enters the wide air inlet pipe 306 through the narrow air inlet pipe 301. When the air enters the wide air inlet pipe 306, the air and dust can be dispersed towards the inner wall of the wide air inlet pipe 306 by the guide block 309. At this time, if the airflow carries large particles of impurities, they will enter the collection ring box 305 due to inertia. At the same time, the second motor 302 drives the second transmission gear 303 and the external gear ring 304 to rotate, which in turn drives the collection ring box 305 to rotate. After the large particles of impurities enter the collection ring box 305, they can be driven to rotate. Through centrifugal force, the large particles of impurities are always kept inside the collection ring box 305, thus achieving the separation of large particles of impurities and preventing large particles of impurities from colliding with the filter screen 208 and causing the filter screen 208 to break.

[0032] Instructions for use: Air is drawn into ventilation pipe 1 by exhaust fan 203 and then enters filter pipe 201. When the air flows through filter screen 208, dust is intercepted by filter screen 208, thus achieving the filtration and separation of dust and air. Dust gradually accumulates on filter 208, increasing air resistance. When the air pushes the filter 208 with a force exceeding the upper limit of the resistance generated by the two resistance plates 211 and the resistance push spring 213, the support ring 207 and the filter 208 move forward gradually until the support ring 207 presses the forward and reverse control switch 209. The forward and reverse control switch 209 has a built-in bidirectional timing module. When triggered, it controls the exhaust fan 203 to reverse, so that the outside air enters the filter pipe 201 through the air outlet 202 and passes through the filter screen 208 in the opposite direction, blowing away the accumulated dust. When the forward / reverse control switch 209 is pressed, the first motor 206 drives the first transmission gear 224 to rotate, which in turn drives the first transmission rack 223 to move upward and the second transmission rack 225 to move downward. This, in turn, drives the second moving baffle 220 to move upward and the first moving baffle 217 to move downward, so that the second fixed baffle 219 and the second moving baffle 220 close the ventilation pipe 1, while the dust exhaust pipe 205 opens. The detached dust enters the diversion pipe 204 with the airflow and is discharged to the designated location through the dust discharge pipe 205; After the cleaning timer ends, the bidirectional timer module controls the exhaust fan 203 to resume forward rotation, and at the same time controls the first motor 206 to rotate in reverse, driving the second moving baffle 220 to move downward and the first moving baffle 217 to move upward, so that the ventilation pipe 1 is opened and the dust exhaust pipe 205 is closed, and the filtration and dust removal continues. Before filtration, the air enters the air inlet wide pipe 306 through the narrow air inlet pipe 301. Under the guidance of the guide block 309, the air and dust are dispersed to the inner wall of the air inlet wide pipe 306. Large particles of impurities carried by the device enter the collection ring box 305 due to inertia. At the same time, the second motor 302 drives the second transmission gear 303 and the external gear ring 304 to rotate, which in turn drives the collection ring box 305 to rotate. Centrifugal force is used to keep the large particles of impurities inside the collection ring box 305, preventing them from colliding with the filter screen 208 and causing the filter screen 208 to break.

[0033] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A dust removal and filtration device with self-cleaning function, comprising a ventilation duct (1), characterized in that: It also includes a self-cleaning mechanism, which is located at the front end of the ventilation pipe (1). The self-cleaning mechanism includes a filter pipe (201) connected to the front end of the ventilation pipe (1). A support ring (207) is provided inside the filter pipe (201). A filter screen (208) is fixedly connected to the inner arc surface of the support ring (207). Two first support blocks (212) are fixedly connected to the inner wall of the filter pipe (201). A guide post (210) is fixedly connected between the two first support blocks (212). The guide post (210) is slidably inserted into the support ring (207). A forward and reverse control switch (209) is fixedly connected inside the filter pipe (201). An air outlet duct (202) is connected to the front end of the filter pipe (201). An exhaust fan (203) is installed inside the air outlet duct (202). A bidirectional timing module is provided inside the forward and reverse control switch (209).

2. The dust removal and filtration device with self-cleaning function according to claim 1, characterized in that: The left side of the ventilation pipe (1) is connected to a diversion pipe (204), and the front end of the diversion pipe (204) is connected to a dust exhaust pipe (205).

3. A dust removal and filtration device with self-cleaning function according to claim 2, characterized in that: The dust exhaust pipe (205) is fixedly connected to a first fixed baffle (218), the ventilation pipe (1) is fixedly connected to a second fixed baffle (219), the top end of the dust exhaust pipe (205) is slidably inserted with a first connecting frame (221), the top end of the ventilation pipe (1) is slidably inserted with a second connecting frame (222), the lower end of the first connecting frame (221) is fixedly connected with a first moving baffle (217), and the lower end of the second connecting frame (222) is fixedly connected with a second moving baffle (220).

4. A dust removal and filtration device with self-cleaning function according to claim 3, characterized in that: A support plate (226) is fixedly connected to the right side of the dust exhaust pipe (205). A first motor (206) is fixedly connected to the upper surface of the support plate (226). A first transmission gear (224) is fixedly connected to the output shaft of the first motor (206). A second transmission rack (225) is fixedly connected to the transverse arm end of the first connecting frame (221). A first transmission rack (223) is fixedly connected to the front end of the second connecting frame (222). The first transmission rack (223) and the second transmission rack (225) are both meshed with the first transmission gear (224). The forward and reverse control switch (209) is used to control the forward and reverse rotation of the exhaust fan (203) and the first motor (206).

5. A dust removal and filtration device with self-cleaning function according to claim 1, characterized in that: The filter tube (201) is fixedly connected to the top of the inner end of a second support block (215), and the lower end of the second support block (215) is rotatably connected to two resistance plates (211). A resistance push spring (213) is fixedly connected to the front end between the two resistance plates (211).

6. A dust removal and filtration device with self-cleaning function according to claim 5, characterized in that: The upper end of the support ring (207) is fixedly connected to a support frame (216), and the two resistance plates (211) are inserted into the interior of the support frame (216). The interior of the support frame (216) is rotatably connected to two extrusion shafts (214), and the two resistance plates (211) are located between the two extrusion shafts (214).

7. A dust removal and filtration device with self-cleaning function according to claim 1, characterized in that: It also includes a separation mechanism, which is located at the rear end of the ventilation pipe (1). The separation mechanism includes an air inlet wide pipe (306) located at the rear end of the ventilation pipe (1). The rear end of the air inlet wide pipe (306) is connected to an air inlet narrow pipe (301). A guide block (309) is fixedly connected inside the air inlet wide pipe (306). The guide block (309) has a conical structure. A support frame (308) is fixedly connected to the rear end of the lower surface of the ventilation pipe (1). The rear end of the support frame (308) is fixedly connected to the surface of the air inlet wide pipe (306).

8. A dust removal and filtration device with self-cleaning function according to claim 7, characterized in that: A collection ring box (305) is provided between the air inlet wide pipe (306) and the ventilation pipe (1). The collection ring box (305) is connected to the air inlet wide pipe (306) and the ventilation pipe (1) through a rotary joint (307) and rotates.

9. A dust removal and filtration device with self-cleaning function according to claim 8, characterized in that: The front end of the collection ring box (305) has an inclined outward convex structure.

10. A dust removal and filtration device with self-cleaning function according to claim 8, characterized in that: The upper surface of the ventilation pipe (1) is fixedly connected to the rear end of the second motor (302), and the output shaft of the second motor (302) is fixedly connected to the second transmission gear (303). The surface of the collection ring box (305) is fixedly fitted with an external toothed ring (304), and the external toothed ring (304) meshes with the second transmission gear (303).

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