Dust-proof device for zipper production equipment

Abstract

The present invention discloses a dustproof device for zipper production equipment, including a polishing part including a support plate, the support plate is symmetrically arranged with two pieces, a support part including a support frame, the support frame is symmetrically arranged with two pieces; one end of the air inlet pipe in the dust removal part is connected with an air inlet box, and the air inlet box is fixed on the support plate, and the air outlet end of the air inlet pipe is connected with a wind pump, and the top surface of the water bucket is connected with an exhaust pipe, the air inlet end of the first filter element is connected with the exhaust pipe on the water bucket, and the air inlet end of the second filter element is connected with the exhaust end on the first filter element. The present invention overcomes the problem that the existing equipment for polishing the chain teeth in the zipper production lacks a dustproof structure during polishing, which not only causes the air in the zipper production workshop to be polluted, which is not conducive to the respiratory health of the production personnel, but also the smoke and dust drifting causes the workers who process the zipper to have their sight blocked, and they cannot make processing adjustments in time according to the zipper processing situation, which has certain safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of dust prevention in zipper production, and in particular to a dust prevention device for zipper production equipment. Background Art

[0002] The zipper is composed of chain teeth, pull heads, limit codes or locking parts. The chain teeth are the key part, which directly determines the side pull strength of the zipper. Generally, the zipper has two chain belts, each of which has a row of chain teeth, and the two rows of chain teeth are arranged alternately. The pull head clamps the chain teeth on both sides, and with the help of the pull tab, the chain teeth on both sides can be engaged or disengaged with each other. In the production of existing zippers, the chain teeth need to be fixed on the cloth belt, and then the cloth belt is sewn to the joint of the clothing. In the production of existing zippers, the chain teeth need to be polished to keep the surface of the chain teeth smooth. By polishing the surface of the chain teeth, the smoothness of the chain teeth is improved. The existing method of surface polishing of the chain teeth is mainly to polish the chain teeth with a grinding wheel. The dust generated during polishing floats in the air and forms smoke.

[0003] The equipment for polishing the chain teeth in the existing zipper production lacks a dust-proof structure during polishing. Since the dust reduction effect is not ideal, the existing zipper production equipment is unable to effectively remove dust during the production process. The smoke and dust float in the workshop, which not only causes the air in the zipper production workshop to be polluted, which is not conducive to the respiratory health of the production personnel, but also the smoke and dust cause the vision of the workers processing the zippers to be blocked, and they cannot make processing adjustments in time according to the zipper processing situation, which poses certain safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a dust-proof device for zipper production equipment, aiming to improve the existing equipment for polishing chain teeth in zipper production. The lack of a dust-proof structure during polishing not only causes the air in the zipper production workshop to be polluted, which is not conducive to the respiratory health of production personnel, but also the drifting of smoke and dust causes the vision of workers processing zippers to be blocked, and they cannot make processing adjustments in time according to the zipper processing situation, which poses certain safety hazards.

[0005] The present invention is achieved in that:

[0006] A dustproof device for zipper production equipment, comprising:

[0007] The polishing part includes a support plate, two support plates are symmetrically arranged, and a plurality of guide rollers are horizontally rotatably connected between the two support plates, and polishing parts for polishing chain teeth are symmetrically arranged on the upper and lower sides of the two support plates;

[0008] The support member includes a support frame, which is symmetrically provided with two support frames, and the two support frames are respectively fixed at the two ends of the two support plates, and both ends of the support frame are provided with a discharge slot, and the outer end surface of the support frame is horizontally symmetrically provided with rollers and upper pressure rollers on the upper and lower sides of the discharge slot, and the rollers and the upper pressure rollers are rotatably connected to the support frame;

[0009] The dust removal component includes an air inlet pipe, a water bucket, a first filter component and a second filter component, wherein one end of the air inlet pipe is connected to an air inlet box, and the air inlet box is fixed on the support plate, and the air outlet end of the air inlet pipe is connected to an air pump, and the top surface of the water bucket is connected to an exhaust pipe, the air inlet end of the first filter component is connected to the exhaust pipe on the water bucket, and the air inlet end of the second filter component is connected to the exhaust end on the first filter component.

[0010] Furthermore, clamping rings are slidably sleeved on both sides of the outer circumference of the guide roller, and first springs are horizontally fixedly sleeved on both ends of the outer circumference of the guide roller, and the other end of the first spring is fixed on the outer end surface of the clamping ring, and multiple elastic pressure plates are evenly and vertically fixed on the outer circumference of the guide roller.

[0011] Furthermore, the grinding part includes a grinding frame and an adjusting plate. The grinding frame is fixed on the support plate, and a sliding hole and a screw hole are vertically opened on the grinding frame, and an adjusting screw is installed through the vertical thread in the screw hole of the grinding frame. The adjusting plate is arranged on a side of the grinding frame close to the support plate, and a sliding rod passing through the sliding hole is vertically fixed on the top surface of the adjusting plate, and the top surface of the adjusting plate is rotatably connected to the bottom end of the adjusting screw.

[0012] Furthermore, an elastic sheet is fixed vertically downward on the bottom surface of the adjustment plate, and multiple second springs are vertically fixed on the horizontal end surface of the elastic sheet close to the support plate. A frame is horizontally fixed to one end of the second spring close to the support plate, and a grinding motor is vertically fixed on the bottom surface of the frame.

[0013] Furthermore, an air intake cylinder is vertically inserted on the top surface of the bucket, and the air intake cylinder is connected and assembled with the air intake pipe. A water pipe is connected through the top surface of the bucket for filling or draining water in the bucket, and a valve is fixed on the water pipe of the bucket.

[0014] Furthermore, the first filter element includes a dust removal cylinder, one end of which is connected to the exhaust pipe end of the bucket, and a support cylinder is horizontally fixed inside the dust removal cylinder, and a cloth bag is provided on the outside of the support cylinder, and the other end of the dust removal cylinder is inserted into the support cylinder and connected to the exhaust pipe.

[0015] Furthermore, a dust collecting groove is provided on the outer circumferential surface of the bottom of the dust collecting cylinder, and a sealing plug is inserted in the dust collecting groove.

[0016] Furthermore, the second filter element includes a filter cartridge, a plurality of filter cartridges are vertically arranged, and the plurality of filter cartridges are vertically connected and assembled, a perforated plate is horizontally fixed on the lower side of the interior of the filter cartridge, and the interior of the filter cartridge is filled with filter cotton.

[0017] Furthermore, the tops of the multiple filter cartridges are connected and fixed with screw rings, and the bottom of the inner circumferential surface of the filter cartridge is provided with internal threads. The dustproof device for zipper production equipment is characterized in that the adjacent screw rings of the filter cartridge are assembled and connected with the internal threads.

[0018] Furthermore, the top screw rings of the multiple filter cartridges are threadedly connected to top covers, and the bottoms of the multiple filter cartridges are assembled with bottom covers in cooperation with internal threads, and the bottom ends of the bottom covers are connected to exhaust pipes.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The dust from grinding and polishing is driven by the air pump through the air intake pipe and enters the air intake cylinder in the water bucket. The air intake cylinder is plugged below the liquid level of the water bucket. The dust in the air is washed into the water, and the air flows upward and is discharged through the exhaust pipe on the water bucket, thereby purifying the dust generated during the production and polishing of the zipper;

[0021] 1. The air discharged from the water bucket flows into the dust collecting cylinder. The flowing air needs to pass through the cloth bag and enter the support cylinder. The air is filtered by the cloth bag to remove dust in the dust collecting cylinder. The air is discharged through the exhaust pipe connected to the support cylinder through the dust collecting cylinder. The dust in the filtered air is removed by taking out the plug in the dust collecting groove. The dust falls through the dust collecting groove and is discharged from the dust collecting cylinder, thereby purifying the dust in the discharged air.

[0022] During use, the top cover of the second filter element is connected to the exhaust pipe on the dust collector, and the air passes through the filter cotton in multiple filter cartridges in turn to filter and remove dust and impurities in the air. Then the air is discharged through the bottom end of the bottom cover and connected to the exhaust pipe, thereby purifying the impurities in the air. At the same time, in order to facilitate the replacement of filter cotton in the later stage and maintain the filtering effect on the air, the screw rings at the adjacent ends of multiple filter cartridges are assembled and connected with the internal threads, which is convenient for disassembly to replace the internal filter cotton and maintain the filtering effect on the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the decomposed structure of the present invention;

[0026] Figure 3is a schematic structural diagram of a support member in a disassembled state according to an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a polishing member in an exploded state according to an embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of a grinding piece in a disassembled state according to an embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of a dust removal component in a disassembled state according to an embodiment of the present invention;

[0030] Figure 7 is a schematic structural diagram of the first filter element in a disassembled state according to an embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the second filter element in the decomposed state according to the embodiment of the present invention.

[0032] In the figure: 1, polishing part; 11, support plate; 12, guide roller; 13, clamp ring; 14, first spring; 15, elastic pressure plate; 16, grinding part; 161, grinding frame; 162, adjustment plate; 163, slide bar; 164, adjustment screw; 165, elastic sheet; 166, second spring; 167, frame; 168, grinding motor; 2, support part; 21, support frame; 22, discharge slot; 23, roller; 24, upper pressure Roller; 3, dust removal part; 31, air inlet pipe; 32, air inlet box; 33, air pump; 34, bucket; 35, first dust removal part; 351, dust removal cylinder; 352, support cylinder; 353, cloth bag; 354, dust collection groove; 355, plug; 36, second filter element; 361, filter cylinder; 362, filter cotton; 363, screw ring; 364, internal thread; 365, orifice plate; 366, top cover; 367, bottom cover; 368, exhaust pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a dustproof device for zipper production equipment comprises:

[0035] The polishing member 1 comprises a support plate 11, two support plates 11 are symmetrically arranged, and a plurality of guide rollers 12 are horizontally rotatably connected between the two support plates 11, and polishing members 16 for polishing chain teeth are symmetrically arranged on the upper and lower sides of the two support plates 11;

[0036] The support member 2 includes a support frame 21, which is symmetrically provided with two support frames 21, and the two support frames 21 are respectively fixed at the two ends of the two support plates 11, and both ends of the support frame 21 are provided with a discharge slot 22, and the outer end surface of the support frame 21 is horizontally symmetrically provided with a roller 23 and an upper pressure roller 24 on the upper and lower sides of the discharge slot 22, and the roller 23 and the upper pressure roller 24 are rotatably connected to the support frame 21;

[0037] The dust removal component 3 includes an air intake pipe 31, a water bucket 34, a first filter component 35 and a second filter component 36, wherein one end of the air intake pipe 31 is connected to an air intake box 32, and the air intake box 32 is fixed on the support plate 11, and the air outlet end of the air intake pipe 31 is connected to an air pump 33, and the top surface of the water bucket 34 is connected to an exhaust pipe, the air intake end of the first filter component 35 is connected to the exhaust pipe on the water bucket 34, and the air intake end of the second filter component 36 is connected to the exhaust end on the first filter component 35.

[0038] See also Figure 3 , Figure 4 and Figure 5, both sides of the outer circumference of the guide roller 12 are slidably sleeved with clamping rings 13, and both ends of the outer circumference of the guide roller 12 are horizontally fixed with first springs 14, and the other end of the first spring 14 is fixed on the outer end surface of the clamping ring 13, and a plurality of elastic pressing sheets 15 are evenly and vertically fixed on the outer circumference of the guide roller 12. During use, the clamping ring 13 on the guide roller 12 slides on the guide roller 12 under the support of the deformation force of the first spring 14, squeezes and clamps the chain teeth in the zipper for transmission at a fixed height, and polishes Component 16 includes a grinding frame 161 and an adjusting plate 162. The grinding frame 161 is fixed on the support plate 11, and a sliding hole and a screw hole are vertically penetrated on the grinding frame 161, and an adjusting screw 164 is installed in the screw hole of the grinding frame 161 through a vertical thread. The adjusting plate 162 is arranged on a side of the grinding frame 161 close to the support plate 11, and a sliding rod 163 penetrating the sliding hole is vertically fixed on the top surface of the adjusting plate 162, and the top surface of the adjusting plate 162 is rotatably connected to the bottom end of the adjusting screw 164. An elastic sheet 165 is fixed vertically downward on the bottom surface of the adjusting plate 162, and a plurality of second springs 166 are vertically fixed on the horizontal end surface of the elastic sheet 165 close to the support plate 11. A frame 167 is horizontally fixed to one end of the second spring 166 close to the support plate 11, and a grinding motor 168 is vertically fixed on the bottom surface of the frame 167. During use, according to the need to grind the chain teeth, the adjusting screw 164 on the adjusting plate 162 is rotated to vertically push the adjusting plate 162 to slide vertically on the grinding frame 161, driving the grinding wheel on the grinding motor 168 on the frame 167 arranged at the bottom to approach and contact the chain teeth in zipper production. When grinding the chain teeth, the vibration generated by the grinding motor 168 is deformed and absorbed by the elastic sheet 165 and the second spring 166. At the same time, the elastic sheet 165 and the second spring 166 are deformed by the squeezing of the adjusting plate 162, pressing the grinding wheel on the grinding motor 168 to contact the chain teeth, thereby maintaining the compactness of the chain teeth grinding.

[0039] See also Figure 6 An air intake cylinder is vertically inserted on the top surface of the water bucket 34, and the air intake cylinder is connected and assembled with the air intake pipe 31. A water pipe is connected through the top surface of the water bucket 34 for filling or discharging water in the water bucket 34, and a valve is fixed on the water pipe of the water bucket 34. The dust from grinding and polishing is driven by the air pump 33 through the air intake pipe 31 and enters the air intake cylinder in the water bucket 34. The air intake cylinder is inserted below the liquid level of the water bucket 34. The dust entering the air is washed into the water, and the air flows upward and is discharged through the exhaust pipe on the water bucket 34, thereby purifying the dust generated during the production and polishing of the zipper.

[0040] See also Figure 6 and Figure 7The first filter element 35 includes a dust removal cylinder 351, one end of which is connected to the end of the exhaust pipe of the water bucket 34, and a support cylinder 352 is horizontally fixed inside the dust removal cylinder 351, and a cloth bag 353 is sleeved on the outside of the support cylinder 352, and the other end of the dust removal cylinder 351 is inserted into the support cylinder 352 and connected to the exhaust pipe. A dust collecting groove 354 is provided on the outer circumferential surface of the bottom of the dust collecting cylinder 351, and a plug 355 is inserted in the dust collecting groove 354. The air discharged from the water bucket 34 flows into the dust collecting cylinder 351, and the flowing air needs to pass through the cloth bag 353 to enter the support tube 352. The air is filtered by the cloth bag 353 to remove dust in the dust collecting cylinder 351, and the air is discharged through the exhaust pipe connected to the dust collecting cylinder 351 inserted in the support tube 352. The dust in the filtered air is removed by taking out the plug 355 in the dust collecting groove 354, and the dust falls through the dust collecting groove 354 and is discharged from the dust collecting cylinder 351, thereby purifying the dust in the discharged air.

[0041] See also Figure 6 , Figure 7 and Figure 8 The second filter element 36 includes a filter cartridge 361, a plurality of filter cartridges 361 are vertically arranged, and the plurality of filter cartridges 361 are vertically connected and assembled, a perforated plate 365 is horizontally fixed to the lower side of the inner part of the filter cartridge 361, and the interior of the filter cartridge 361 is filled with filter cotton 362, a screw ring 363 is connected and fixed to the top of the plurality of filter cartridges 361, and an internal thread 364 is provided at the bottom of the inner circumferential surface of the filter cartridge 361, and the adjacent screw rings 363 of the filter cartridge 361 are threadedly assembled and connected with the internal thread 364, a top cover 366 is threadedly connected on the top screw ring 363 of the plurality of filter cartridges 361, and a bottom cover 367 is assembled with the internal thread 364 at the bottom of the plurality of filter cartridges 361, and The bottom end of the bottom cover 367 is connected to an exhaust pipe 368. When in use, the top cover 366 at the top of the second filter element 36 is connected to the exhaust pipe on the dust removal cylinder 351. The air passes through the filter cotton 362 in the multiple filter cartridges 361 in turn to be filtered to remove dust and impurities in the air. Then the air is discharged through the bottom end of the bottom cover 367 connected to the exhaust pipe 368, thereby purifying the impurities in the air. At the same time, in order to facilitate the replacement of the filter cotton 362 at a later time and maintain the filtering effect on the air, the screw rings 363 at the adjacent ends of the multiple filter cartridges 361 are threadedly assembled and connected with the internal threads 364, which is convenient for disassembly to replace the internal filter cotton 362 and maintain the filtering effect on the air.

[0042] Working principle: When the zipper is used to produce chain teeth, the chain teeth are inserted from the support frame 21 of the support member 2 at one end of the support plate 11, and the chain teeth are sequentially extruded and guided by the guide roller 12 in the support plate 11, and inserted from the support frame 21 of the support member 2 at the other end of the support plate 11. The chain teeth pass through the grinding member 16, and the grinding wheels on the two symmetrically arranged grinding motors 168 are used to grind and polish the chain teeth. Then the dust generated is started by the air pump 33 and enters the air intake pipe 31 from the air intake and 32, and enters the air intake cylinder in the water bucket 34 through the air intake pipe 31. The air intake cylinder is plugged below the liquid level of the water bucket 34, and the dust entering the air is washed into the water, and the air The air flows upward and is discharged through the exhaust pipe on the water bucket 34. The air discharged from the water bucket 34 enters the dust removal cylinder 351 and flows. The flowing air needs to pass through the cloth bag 353 to enter the support cylinder 352. The air is filtered by the cloth bag 353 to remove dust in the dust removal cylinder 351. The air is discharged through the exhaust pipe connected to the dust removal cylinder 351 inserted in the support cylinder 352. The top cover 366 of the second filter element 36 is connected to the exhaust pipe on the dust removal cylinder 351. The air passes downward through the filter cotton 362 in the multiple filter cylinders 361 in turn to be filtered to remove dust and impurities in the air. Then the air is discharged through the bottom end of the bottom cover 367 which is connected to the exhaust cylinder 368.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dustproof device for zipper production equipment, characterized in that: include: A polishing piece (1), the polishing piece (1) comprising a support plate (11), wherein two support plates (11) are symmetrically arranged, and a plurality of guide rollers (12) are horizontally rotatably connected between the two support plates (11), and polishing pieces (16) for polishing chain teeth are symmetrically arranged on upper and lower sides of the two support plates (11); A support member (2), the support member (2) comprising a support frame (21), the support frame (21) being symmetrically arranged in two pieces, and the two support frames (21) being respectively fixed to the two ends of the two support plates (11), both ends of the support frame (21) being provided with a discharge slot (22), and on the outer end surface of the support frame (21), rollers (23) and an upper pressure roller (24) are horizontally and symmetrically arranged on the upper and lower sides of the discharge slot (22), and the rollers (23) and the upper pressure roller (24) are both rotatably connected to the support frame (21); A dust removal component (3), the dust removal component (3) comprising an air intake pipe (31), a water bucket (34), a first filter component (35) and a second filter component (36), wherein one end of the air intake pipe (31) is connected to an air intake box (32), the air intake box (32) is fixed on the support plate (11), and the air outlet end of the air intake pipe (31) is connected to an air pump (33), the top surface of the water bucket (34) is connected to an exhaust pipe, and the air intake end of the first filter component (35) and the exhaust pipe on the water bucket (34) are connected to each other. The air inlet end of the second filter element (36) is connected to the air outlet end of the first filter element (35), the outer circumferential surface of the guide roller (12) is slidably sleeved with clamping rings (13) on both sides, and the outer circumferential ends of the guide roller (12) are horizontally fixedly sleeved with first springs (14), and the other end of the first spring (14) is fixed to the outer end surface of the clamping ring (13), and a plurality of elastic pressure sheets (15) are evenly and vertically fixed on the outer circumferential surface of the guide roller (12), and the grinding member (1 6) comprising a grinding frame (161) and an adjusting plate (162), wherein the grinding frame (161) is fixed on the support plate (11), and a sliding hole and a screw hole are vertically opened on the grinding frame (161), and an adjusting screw rod (164) is installed in the screw hole of the grinding frame (161) through a vertical thread, and the adjusting plate (162) is arranged on a side of the grinding frame (161) close to the support plate (11), and a sliding rod (163) penetrating the sliding hole is vertically fixed on the top surface of the adjusting plate (162), The top surface of the adjustment plate (162) is rotatably connected to the bottom end of the adjustment screw rod (164); an elastic sheet (165) is vertically fixed downward on the bottom surface of the adjustment plate (162); and a plurality of second springs (166) are vertically fixed on a horizontal end surface of the elastic sheet (165) close to the support plate (11); a frame (167) is horizontally fixed to one end of the second spring (166) close to the support plate (11); and a grinding motor (168) is vertically fixed on the bottom surface of the frame (167); An air intake cylinder is vertically inserted on the top surface of the water bucket (34), and the air intake cylinder is connected and assembled with the air intake pipe (31). A water pipe is connected through the top surface of the water bucket (34) for filling or draining water in the water bucket (34), and a valve is fixed on the water pipe of the water bucket (34). The dust from grinding and polishing is driven by the air pump (33) through the air intake pipe (31) and enters the air intake cylinder in the water bucket (34). The air intake cylinder is inserted below the liquid level of the water bucket (34), and the dust in the air is washed into the water, and the air flows upward through the exhaust pipe on the water bucket (34). The first filter element (35) comprises a dust removal cylinder (351), one end of the dust removal cylinder (351) is connected to the end of the exhaust pipe of the water bucket (34), a support cylinder (352) is horizontally fixed inside the dust removal cylinder (351), and a cloth bag (353) is sleeved on the outside of the support cylinder (352), the other end of the dust removal cylinder (351) is inserted into the support cylinder (352) and connected to the exhaust pipe, a dust collection groove (354) is provided on the outer circumferential surface of the bottom of the dust removal cylinder (351), and a sealing plug (355) is inserted in the dust collection groove (354).

2. A dustproof device for zipper production equipment according to claim 1, characterized in that: The second filter element (36) comprises a filter cartridge (361), a plurality of filter cartridges (361) being vertically arranged, and the plurality of filter cartridges (361) are vertically connected and assembled, a perforated plate (365) is horizontally fixed to the lower side of the interior of the filter cartridge (361), and the interior of the filter cartridge (361) is filled with filter cotton (362).

3. A dustproof device for zipper production equipment according to claim 2, characterized in that: The tops of the multiple filter cartridges (361) are connected and fixed with a screw ring (363), and the bottom of the inner circumferential surface of the filter cartridge (361) is provided with an internal thread (364), and the adjacent screw rings (363) of the filter cartridge (361) are threadedly assembled and connected with the internal thread (364).

4. A dustproof device for zipper production equipment according to claim 3, characterized in that: The top screw rings (363) of the plurality of filter cartridges (361) are threadedly connected to a top cover (366), and the bottoms of the plurality of filter cartridges (361) are assembled with a bottom cover (367) in cooperation with the internal threads (364), and the bottom end of the bottom cover (367) is connected to an exhaust pipe (368).

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