Environment-friendly self-adjusting negative pressure dust removal fan

Abstract

The invention discloses an environment-friendly self-adjusting negative pressure dust removal fan, and particularly relates to the technical field of dust removal fans, the environment-friendly self-adjusting negative pressure dust removal fan comprises a vertical plate, the vertical plate is provided with a shunt conveying dust removal assembly, the shunt conveying dust removal assembly comprises a protective cylinder arranged on the vertical plate, one end of the protective cylinder is provided with a connecting disc, and one end of the connecting disc is provided with a guide pipe. Through corresponding cooperative use of all structures, smoke is pumped by the impeller and then pressurized by the first blades in the reinforced dust removal guide cylinder, and airflow is divided and blocked by all the second blades, so that the backflow phenomenon of the airflow after gathering in the reinforced dust removal guide cylinder is avoided, and the dust removal effect is improved. A liquid medium is conveyed to one end of the reaction dust removal filter element assembly through the guide pipe, the liquid medium makes contact with high-pressure airflow when sprayed out, the liquid medium and the high-pressure airflow make contact with the sieve pore cone, the liquid medium and gas are blocked through the sieve pore cone, diffusion is achieved, the liquid medium and the gas can be fully mixed together conveniently, and the dust removal efficiency and effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal fans, and more specifically, to an environmentally friendly self-regulating negative pressure dust removal fan. Background Art

[0002] Negative pressure dust removal fan is a kind of dust removal equipment. When the flue gas enters the dust collector, it passes through the pre-treatment equipment (such as cyclone separator, wet desulfurization, etc.) at a certain speed, so that the dust particles are separated and deposited at the bottom of the equipment. As the flue gas continues to enter, a certain negative pressure will be formed inside the equipment. At this time, the suction fan starts to run and draws clean air from the top of the equipment. The treated flue gas is discharged into the atmosphere through the exhaust duct, thereby achieving the purpose of purifying the environment.

[0003] Among them, the patent application number CN202121472741.1 discloses a negative pressure dust removal system. It includes: a primary dust collector, a secondary dust collector, a tertiary dust collector, a fan and a connecting pipe. A negative pressure balance pipe is installed at the lower part of the vertebral body of the tertiary dust collector. The lower part of the negative pressure balance pipe is set at the balanced water level of the water tank, and air holes are evenly opened in the underwater part of the negative pressure balance pipe. The upper part of the negative pressure balance pipe is installed at a higher elevation than the water washing level in the tertiary dust collector.

[0004] When this structure is in use, negative pressure is formed in the three-stage dust collector, and the water in the water tank is sucked into the three-stage dust collector through the negative pressure balance pipe. The water level in the lower water tank gradually decreases. When the water level drops to the position of the lower air hole of the negative pressure balance pipe, air enters the three-stage dust collector through the air hole. At this time, the air enters the dust collector in a state of steam and water. Due to the difference in gravity between steam and water, the steam and water separate, causing the negative pressure in the three-stage dust collector to increase, and the water in the water tank is sucked into the three-stage dust collector through the negative pressure balance pipe. However, this structure is not easy to guide and transport the flowing medium when in use, resulting in low dust removal efficiency when the device is in use. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an environmentally friendly self-adjusting negative pressure dust removal fan, which aims to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an environmentally friendly self-adjusting negative pressure dust removal fan, comprising a vertical plate, on which a diversion conveying dust removal component is arranged.

[0007] The diversion conveying dust removal assembly includes a protective cylinder arranged on a vertical plate, a connecting plate is arranged at one end of the protective cylinder, a conduit is arranged at one end of the connecting plate, the conduit is located at one end of the enhanced dust removal guide cylinder body and is connected to the enhanced dust removal guide cylinder body, and a support tube is arranged at one end of the protective cylinder away from the connecting plate.

[0008] A reinforced dust removal guide cylinder is arranged in the protective cylinder, a traction rod is arranged inside the reinforced dust removal guide cylinder, a plurality of reaction dust removal filter element assemblies are distributed on the outside of the traction rod, and a nozzle is arranged at one end of each reaction dust removal filter element assembly, a sieve cone is arranged at the end of the reaction dust removal filter element assembly away from the nozzle, a suction core is arranged on the outside of the reaction dust removal filter element assembly, a pad is arranged on the outside of the plurality of nozzles, the pad is installed on the outside of the suction core, and the outside of the pad extends to the inner wall of the reinforced dust removal guide cylinder.

[0009] A connecting piece is provided at one end of the traction rod, a conical cylinder is provided on one side of the connecting piece, the vertical cross-section shape of the conical cylinder is set to be conical, an extension rod is provided in the conical cylinder, and the extension rod is installed at one end of the traction rod, a plurality of detectors are distributed on the outside of the conical cylinder, and a transition core is provided at one end of each of the detectors, a diverter is provided at one end of the detector away from the transition core, a bearing ring is provided on the outside of the extension rod, a plurality of conduits are distributed on the outside of the enhanced dust removal guide cylinder body, and one end of each of the conduits extends into the enhanced dust removal guide cylinder body.

[0010] It can be seen that in the above technical scheme, after the airflow is gathered and diverted in the enhanced dust removal guide cylinder, the liquid medium is transported to one end of the reaction dust removal filter element assembly through the conduit, and the liquid medium contacts with the high-pressure airflow when it is sprayed out, and both are in contact with the sieve hole cone. The liquid medium and the gas are blocked by the sieve hole cone, so that they diffuse, which is convenient for the two to be fully mixed together and then react and filter on the reaction dust removal filter element assembly. During filtration, the moisture in the reaction dust removal filter element assembly is transferred to the absorption core. After the flue gas is filtered by the reaction dust removal filter element assembly, the airflow is gathered and sprayed out through the nozzle, and the transition core guides it. After that, the airflow contacts with the detector, and the airflow is detected, and it is transported and sprayed out through the diverter. When the airflow is sprayed out, it will contact with the second elastic baffle, so that the second elastic baffle and the first elastic baffle are opened, which is convenient for airflow transportation.

[0011] A controller is provided on one side of the surface of the enhanced dust removal guide cylinder, a flow meter is provided on one side of the inner wall of the enhanced dust removal guide cylinder, a wire is provided on the detector, an impeller is provided at one end of the traction rod, a plurality of first blades are provided on one side of the impeller, and each of the first blades is sleeved on the outer side of the traction rod, multiple first blades are detachably connected to the traction rod, and a limiting cavity is formed between each two adjacent first blades, a second blade is provided in the limiting cavity, and the second blade is installed on the inner wall of the enhanced dust removal guide cylinder, a plurality of first elastic stops are provided at one end of the enhanced dust removal guide cylinder, and each of the first elastic stops is movably connected to the enhanced dust removal guide cylinder through a hinge, a second elastic stop is provided on one side of multiple first elastic stops, and the second elastic stop is installed at one end of the enhanced dust removal guide cylinder.

[0012] It can be seen that in the above technical solution, the impeller rotates through the traction rod, and the rotation of the traction rod can also drive the multiple first blades to rotate. After the smoke is extracted by the impeller, it is pressurized by the first blades in the enhanced dust removal guide cylinder, and the airflow passes through each second blade for diversion and isolation, so as to avoid the backflow phenomenon after the airflow gathers in the enhanced dust removal guide cylinder, and at the same time, the flow meter is used to detect the flow size of the airflow during transportation; Technical effects and advantages of the present invention: The present invention rotates the traction rod and the impeller, and the rotation of the traction rod can also drive the multiple first blades to rotate. After the smoke is extracted by the impeller, it is pressurized by the first blades in the enhanced dust removal guide cylinder, and the airflow is diverted and blocked by each second blade to avoid backflow of the airflow after it is gathered in the enhanced dust removal guide cylinder. At the same time, the flow rate of the airflow during transportation is detected by a flow meter.

[0013] After the airflow of the present invention is gathered and divided in the enhanced dust removal guide cylinder, the liquid medium is transported to one end of the reaction dust removal filter element assembly through a conduit, and the liquid medium contacts with the high-pressure airflow when sprayed out, and both of them contact with the sieve hole cone. The liquid medium and the gas are blocked when passing through the sieve hole cone, so that they diffuse, which facilitates the two to be fully mixed together, and then react and filter on the reaction dust removal filter element assembly. During filtration, the moisture in the reaction dust removal filter element assembly is transferred to the absorption core, which is convenient for its collection.

[0014] After the flue gas of the present invention is filtered by the reaction dust removal filter element assembly, the airflow is gathered and sprayed out through the nozzle, and the transition core guides it. Then the airflow contacts the detector, the airflow is detected, and the airflow is diverted by the diverter to be adsorbed and filtered again, and the conical cylinder is used to divert and transport the airflow outside and inside.

[0015] When the airflow of the present invention is ejected, it will contact the second elastic blocking member, so that the second elastic blocking member and the first elastic blocking member are opened. When the second elastic blocking member and the first elastic blocking member lose the pressure of the airflow ejection, they will return to their positions to block the device, or adjust the opening size according to the airflow pressure.

[0016] To sum up, the overall design is simple and the structure is reasonable. Through the corresponding coordinated use of various structures, the flue gas is extracted by the impeller and pressurized by the first blade in the enhanced dust removal guide cylinder, and the airflow is diverted and blocked by the second blades to avoid backflow after the airflow is gathered in the enhanced dust removal guide cylinder. At the same time, the flow rate of the airflow is detected by the flow meter, and the liquid medium is transported to one end of the reactive dust removal filter element assembly through the conduit. When the liquid medium is sprayed out, it contacts with the high-pressure airflow, and both are in contact with the sieve hole cone. The liquid medium and the gas are blocked by the sieve hole cone, so that they diffuse, which is convenient for the two to be fully mixed together, and then to the reactive dust removal filter element assembly for reaction filtration, and the transition core guides it. After that, the airflow contacts with the detector, detects the airflow, and diverts it through the diverter, and it is adsorbed and filtered again, and the conical cylinder is used to divert and transport the airflow outside and inside it, so as to improve the dust removal efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the installation of the split flow conveying dust removal assembly of the present invention.

[0020] Figure 3 It is a side view of the split flow conveying dust removal assembly of the present invention.

[0021] Figure 4 It is a cross-sectional view of the split flow conveying dust removal assembly of the present invention.

[0022] Figure 5 It is a side view of the split flow conveying dust removal group of the present invention.

[0023] Figure 6 The figure is a cross-sectional view of the dust removal guide cylinder of the present invention.

[0024] Figure 7It is a schematic diagram of the reaction dust removal filter element assembly, the sieve cone and the traction rod of the present invention being installed in the enhanced dust removal guide cylinder.

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the local structure at point A in the middle.

[0026] The reference numerals are: 1, vertical plate; 101, protective tube; 102, connecting plate; 103, conduit; 104, supporting tube; 2. Strengthen the dust removal guide cylinder; 201. Drawbar; 202. Reaction dust removal filter element assembly; 203. Nozzle; 204. Pad; 205. Sieve cone; 206. Suction core; 3. Connecting piece; 301. Conical cylinder; 302. Extension rod; 303. Detector; 304. Transition core; 305. Diverter; 306. Bearing ring; 307. Conduit; 4. Controller; 401. Flow meter; 402. Wire; 403. Impeller; 404. First blade; 405. Limiting cavity; 406. Second blade; 407. First elastic stopper; 408. Second elastic stopper. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] As attached Figure 1-Figure 8 The environmentally friendly self-regulating negative pressure dust removal fan shown in the figure has a shunt conveying dust removal component set on the vertical plate 1. After the smoke is extracted by the impeller 403, it is pressurized by the first blade 404 in the enhanced dust removal guide cylinder 2, and the airflow is shunted and blocked by each second blade 406 to avoid the backflow phenomenon after the airflow is gathered in the enhanced dust removal guide cylinder 2. At the same time, the flow rate of the airflow during transportation is detected by the flow meter 401. The liquid medium is transported to one end of the reaction dust removal filter element component 202 through the conduit 307. When the liquid medium is sprayed out, it is mixed with the high-pressure gas The liquid medium and the gas are blocked by the sieve cone 205, so that they diffuse and are convenient for the two to be fully mixed together, and then the reaction dust removal filter element assembly 202 is used for reaction filtration, and the transition core 304 guides it. Then the airflow contacts the detector 303, and the airflow is detected. It is diverted by the diverter 305 and is adsorbed and filtered again. The conical cylinder 301 is used to divert and transport the airflow outside and inside it, so as to improve the dust removal efficiency and effect, and the specific structure of the assembly is set as follows.

[0031] As the instruction manual Figure 1 and 2 The diversion conveying dust removal assembly shown includes a protective cylinder 101 arranged on a vertical plate 1, a connecting plate 102 is arranged at one end of the protective cylinder 101, a conduit 103 is arranged at one end of the connecting plate 102, the conduit 103 is located at one end of the enhanced dust removal guide cylinder 2 and is connected to the enhanced dust removal guide cylinder 2, and a support tube 104 is arranged at the end of the protective cylinder 101 away from the connecting plate 102.

[0032] As the instruction manual Figure 7 The protective cylinder 101 shown is provided with a reinforced dust removal guide cylinder 2, a traction rod 201 is provided inside the reinforced dust removal guide cylinder 2, a plurality of reaction dust removal filter element assemblies 202 are distributed on the outside of the traction rod 201, and one end of each reaction dust removal filter element assembly 202 is provided with a nozzle 203, a sieve cone 205 is provided at one end of the reaction dust removal filter element assembly 202 away from the nozzle 203, a suction core 206 is provided on the outside of the reaction dust removal filter element assembly 202, and a pad 204 is provided on the outside of the plurality of nozzles 203, the pad 204 is installed on the outside of the suction core 206, and the outside of the pad 204 extends to the inner wall of the reinforced dust removal guide cylinder 2; As the instruction manual Figure 4 and 8 The traction rod 201 shown is provided with a connecting piece 3 at one end, and a conical cylinder 301 is provided on one side of the connecting piece 3. The vertical cross-sectional shape of the conical cylinder 301 is set to be conical. An extension rod 302 is provided in the conical cylinder 301, and the extension rod 302 is installed at one end of the traction rod 201. A plurality of detectors 303 are distributed on the outside of the conical cylinder 301, and a transition core 304 is provided at one end of each detector 303. A diverter 305 is provided at one end of the detector 303 away from the transition core 304, and a bearing ring 306 is provided on the outside of the extension rod 302. A plurality of conduits 307 are distributed on the outside of the enhanced dust removal guide cylinder 2, and one end of each conduit 307 extends into the enhanced dust removal guide cylinder 2.

[0033] As the instruction manual Figure 3 and 6 The enhanced dust removal guide cylinder 2 shown in the figure is provided with a controller 4 on one side of the surface, a flow meter 401 is provided on one side of the inner wall of the enhanced dust removal guide cylinder 2, a wire 402 is provided on the detector 303, an impeller 403 is provided at one end of the traction rod 201, and a plurality of first blades 404 are provided on one side of the impeller 403, and each first blade 404 is sleeved on the outer side of the traction rod 201, and the plurality of first blades 404 are detachably connected to the traction rod 201, and each adjacent two first blades 404 are connected to the traction rod 201. A limiting cavity 405 is formed therein, and a second blade 406 is arranged in the limiting cavity 405. The second blade 406 is mounted on the inner wall of the enhanced dust removal guide cylinder 2. One end of the enhanced dust removal guide cylinder 2 is provided with a plurality of first elastic stops 407, and each first elastic stop 407 is movably connected to the enhanced dust removal guide cylinder 2 through a hinge. One side of the plurality of first elastic stops 407 is provided with a second elastic stop 408, and the second elastic stop 408 is mounted on one end of the enhanced dust removal guide cylinder 2.

[0034] According to the above structure, when in use, the staff installs the device at the designated position, and when removing dust from the flue gas, the impeller 403 is rotated through the traction rod 201, and the rotation of the traction rod 201 can also drive multiple first blades 404 to rotate. After the flue gas is extracted by the impeller 403, it is pressurized by the first blades 404 in the enhanced dust removal guide cylinder 2, and the airflow is diverted and blocked by each second blade 406 to avoid backflow of the airflow after it is gathered in the enhanced dust removal guide cylinder 2. At the same time, the flow meter 401 is used to detect the flow rate of the airflow during transportation.

[0035] After the airflow is gathered and diverted in the enhanced dust removal guide cylinder 2, the liquid medium is transported to one end of the reaction dust removal filter element assembly 202 through the conduit 307. When the liquid medium is sprayed out, it contacts with the high-pressure airflow, and both of them contact with the sieve hole cone 205. The liquid medium and the gas are blocked when passing through the sieve hole cone 205, so that they diffuse, which facilitates the two to be fully mixed together and react filtered on the reaction dust removal filter element assembly 202. During filtration, the moisture in the reaction dust removal filter element assembly 202 is transferred to the absorption core 206.

[0036] At the same time, after the flue gas is filtered by the reaction dust removal filter element assembly 202, the airflow is gathered and sprayed out through the nozzle 203, and the transition core 304 guides it. Then the airflow contacts the detector 303, and the airflow is detected. It is guided and transported and sprayed out through the diverter 305, and when the airflow is sprayed out, it contacts the second elastic blocking member 408, so that the second elastic blocking member 408 and the first elastic blocking member 407 are opened.

[0037] Different from the prior art, the present application discloses an environmentally friendly self-adjusting negative pressure dust removal fan, in which the smoke is extracted through the impeller 403 and then pressurized through the first blade 404 in the enhanced dust removal guide cylinder 2, and the airflow is divided and blocked through each second blade 406 to avoid the backflow phenomenon after the airflow is gathered in the enhanced dust removal guide cylinder 2. At the same time, the flow rate of the airflow is detected by the flow meter 401, and the liquid medium is transported to one end of the reaction dust removal filter element assembly 202 through the conduit 307, and the liquid medium is sprayed When it comes out, it comes into contact with the high-pressure airflow, and both of them come into contact with the sieve hole cone 205. The liquid medium and the gas are blocked when passing through the sieve hole cone 205, so that they diffuse, which is convenient for the two to be fully mixed together, and then to the reaction dust removal filter element component 202 for reaction filtration, and the transition core 304 guides it. After that, the airflow comes into contact with the detector 303, and the airflow is detected. It is diverted through the diverter 305 and adsorbed and filtered again. The conical cylinder 301 is used to divert and transport the airflow outside and inside it, so as to improve the dust removal efficiency and effect.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly self-adjusting negative pressure dust removal fan, comprising a vertical plate (1), characterized in that: The vertical plate (1) is provided with a flow-dividing, conveying and dust-removing assembly; The split-flow conveying dust removal assembly comprises a protective cylinder (101) arranged on a vertical plate (1), and a connecting plate (102) is arranged at one end of the protective cylinder (101); A reinforced dust removal guide cylinder (2) is arranged inside the protective cylinder (101), a traction rod (201) is arranged inside the reinforced dust removal guide cylinder (2), a plurality of reaction dust removal filter element assemblies (202) are distributed outside the traction rod (201), and one end of each reaction dust removal filter element assembly (202) is provided with a nozzle (203), a sieve cone (205) is arranged at one end of the reaction dust removal filter element assembly (202) away from the nozzle (203), and a suction core (206) is arranged outside the reaction dust removal filter element assembly (202); A connecting piece (3) is provided at one end of the traction rod (201), a conical cylinder (301) is provided on one side of the connecting piece (3), the vertical cross-section of the conical cylinder (301) is set to be conical, an extension rod (302) is provided inside the conical cylinder (301), and the extension rod (302) is installed at one end of the traction rod (201).

2. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: A conduit (103) is provided at one end of the connection disk (102); the conduit (103) is located at one end of the enhanced dust removal guide cylinder (2) and is connected to the enhanced dust removal guide cylinder (2); and a support tube (104) is provided at one end of the protective cylinder (101) away from the connection disk (102).

3. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: A pad (204) is provided on the outside of each of the plurality of nozzles (203); the pad (204) is installed on the outside of the suction core (206); the outside of the pad (204) extends to the inner wall of the enhanced dust removal guide cylinder (2).

4. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: A plurality of detectors (303) are distributed outside the conical cylinder (301), and a transition core (304) is provided at one end of each detector (303), a flow divider (305) is provided at one end of the detector (303) away from the transition core (304), and a wire (402) is provided on the detector (303).

5. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: A bearing ring (306) is arranged on the outside of the extension rod (302), and a plurality of conduits (307) are distributed on the outside of the enhanced dust removal guide cylinder (2), and one end of each conduit (307) extends into the enhanced dust removal guide cylinder (2).

6. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: A controller (4) is provided on one side of the surface of the enhanced dust removal and flow guiding cylinder (2), and a flow meter (401) is provided on one side of the inner wall of the enhanced dust removal and flow guiding cylinder (2).

7. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: An impeller (403) is provided at one end of the traction rod (201), a plurality of first blades (404) are provided on one side of the impeller (403), and each of the first blades (404) is sleeved on the outside of the traction rod (201).

8. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 7 is characterized in that: The plurality of first blades (404) are detachably connected to the traction rod (201), and a limiting cavity (405) is formed between each two adjacent first blades (404), a second blade (406) is arranged in the limiting cavity (405), and the second blade (406) is mounted on the inner wall of the enhanced dust removal guide cylinder (2).

9. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 1 is characterized in that: One end of the enhanced dust removal guide cylinder (2) is provided with a plurality of first elastic blocking members (407), and each of the first elastic blocking members (407) is movably connected to the enhanced dust removal guide cylinder (2) via a hinge.

10. The environmentally friendly self-adjusting negative pressure dust removal fan according to claim 9 is characterized in that: A second elastic stopper (408) is provided on one side of each of the plurality of first elastic stops (407), and the second elastic stopper (408) is mounted on one end of the enhanced dust removal guide cylinder (2).

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