A gas filtering device for a production plant

Abstract

The application discloses a kind of gas filtering equipment for production workshop, including filter cartridge, the periphery of filter cartridge is fixedly provided with air inlet pipe, the top of filter cartridge is provided with air outlet pipe, the bottom of filter cartridge is provided with discharge port, filter cartridge is provided with primary filter plate inside, primary filter plate is sequentially provided with medium-efficiency filter plate, high-efficiency filter plate above;The bottom of primary filter plate is provided with fixed tube, the periphery of fixed tube is arrayed with cleaning hair, the center below of fixed tube is provided with driving assembly, when fixed tube rotates when using, fixed tube simultaneously drives gear to revolve around impeller center, simultaneously realize the effect that gear is rotated under the action of first tooth groove, gear rotation is driven fixed tube to rotate by connecting shaft, fixed tube rotation makes that arrayed cleaning hair on it rotates, to realize the rotation of fixed tube around impeller center simultaneously, improve the efficiency of cleaning primary filter plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas filtration, in particular to a gas filtration equipment for production workshop. BACKGROUND

[0002] In the plastic box production workshop, various harmful gases and particulate matter will be generated during plastic processing, and dust and particulate matter in the air may enter the production equipment, causing equipment wear and failure and increasing maintenance costs. Therefore, the use of gas filtration equipment in the plastic box production workshop is a key facility to ensure the air quality in the workshop.

[0003] Chinese patent publication No. CN219559060U discloses a gas filtration equipment, which comprises a device mounting rack, a filter cartridge is arranged on the device mounting rack, an air outlet cylinder is connected to the upper part of the filter cartridge and communicates with the inside of the filter cartridge, a dust collecting hopper is arranged at the bottom of the filter cartridge and communicates with the inside of the filter cartridge, a dust collecting barrel is arranged at the bottom of the dust collecting hopper, the bottom of the dust collecting hopper is provided with a dust collecting hopper opening which matches the upper opening of the dust collecting barrel and allows the inside of the dust collecting hopper to communicate with the inside of the dust collecting barrel, a rolling guide plate is arranged inside the device mounting rack, the dust collecting barrel is supported on the rolling guide plate through a lifting support assembly, air inlet holes are arranged on the side of the dust collecting hopper, and air outlet holes are arranged on the air outlet cylinder.

[0004] In the prior art, a plurality of filter plates or filter screens are arranged on the filter cartridge to filter the gas conveyed into the filter cartridge. However, in actual use, the filter plates or filter screens may be clogged with a large amount of dust and other particulate matter after a long time of use, resulting in increased wind resistance and affecting the efficiency of the entire gas filtration equipment.

[0005] Therefore, it is necessary to provide a gas filtration equipment for production workshop to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a gas filtration equipment for production workshop to solve the problems raised in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a gas filtration equipment for production workshop, comprising a filter cartridge, a wind inlet pipe is fixedly arranged on the periphery of the filter cartridge, a wind outlet pipe is arranged on the top of the filter cartridge, a discharge port is arranged at the bottom of the filter cartridge, a primary efficiency filter plate is arranged in the filter cartridge, a medium efficiency filter plate and a high efficiency filter plate are sequentially arranged above the primary efficiency filter plate, a fixed pipe is arranged at the bottom of the primary efficiency filter plate, cleaning hairs are arrayed on the periphery of the fixed pipe, a driving assembly is arranged below the center of the fixed pipe, and the driving assembly drives the fixed pipe to rotate when the driving assembly rotates.

[0008] As a further scheme of the present application: the driving assembly comprises an impeller; a fixed cover is arranged on the periphery of the impeller, a support plate is fixedly arranged on the bottom of the fixed cover, the two ends of the support plate away from the fixed cover are fixedly connected with the inner wall of the filter cylinder, a telescopic column is fixedly arranged on the top center of the impeller, a sleeve ring is fixedly arranged on the end of the telescopic column away from the impeller, and the sleeve ring is sleeved on the center periphery of the fixed tube.

[0009] As a further scheme of the present application: a connecting shaft is fixedly arranged on the center of one end of the fixed tube, a gear is fixedly arranged on the end of the connecting shaft away from the fixed tube, an installation groove is arranged in the side wall of the filter cylinder, and a disc is arranged in the installation groove; a first tooth groove is arranged on the top of the disc and is in transmission engagement with the gear.

[0010] As a further scheme of the present application: a plurality of groups of notches are arranged in an annular array along the center of the disc, a vertical plate is fixedly arranged in the installation groove and is in sliding fit with the notches, and the bottom of the disc is elastically connected with the filter cylinder.

[0011] As a further scheme of the present application: a blocking plate is arranged on the top side wall of the disc close to the fixed tube, the blocking plate is rotationally connected with the connecting shaft, and the top of the blocking plate is in sliding fit with the bottom of the primary efficiency filter plate.

[0012] As a further scheme of the present application: the blocking plate comprises an outer plate and an inner plate; the bottom of the outer plate is in sliding fit with the top of the disc, the top of the outer plate is provided with a containing groove, the inner plate is slidingly arranged in the containing groove, a spring is arranged between the bottom of the inner plate and the containing groove, the top of the inner plate is in sliding fit with the bottom of the primary efficiency filter plate, and the outer plate is rotationally connected with the connecting shaft.

[0013] As a further scheme of the present application: a rotating shaft is rotationally connected in the fixed tube, an opening is arranged on the end of the fixed tube away from the gear, a blade is arranged on the periphery of the end of the rotating shaft close to the opening, a plurality of groups of blades are arranged in an annular array along the center of the rotating shaft, and a strip-shaped groove is arranged on the side wall of the fixed tube.

[0014] As a further scheme of the present application: a tooth is fixedly arranged on the end of the rotating shaft away from the gear, a ring is fixedly connected with the top of the disc, an annular groove is arranged on the side of the ring close to the rotating shaft, the tooth is arranged in the annular groove, and a second tooth groove is arranged on the bottom of the annular groove and is in engagement with the tooth.

[0015] As a further scheme of the present application: an arc-shaped plate is slidingly fitted in the fixed tube, a positioning rod is fixedly arranged on the end of the arc-shaped plate close to the tooth and is symmetrically arranged along the center, and the end of the positioning rod away from the arc-shaped plate is fixedly connected with the blocking plate.

[0016] As a further scheme of the present application: the inner wall bottom of the arc-shaped plate is fixedly provided with a semi-cylinder, and the periphery of the rotating shaft is fixedly provided with an elastic plate.

[0017] Compared with the prior art, the present application has the beneficial effects that: when in use, when the fixed tube rotates, the fixed tube synchronously drives the gear to revolve around the impeller center, and at the same time, the gear is rotated under the action of the first tooth groove, the rotation of the gear drives the fixed tube to rotate through the connecting shaft, the rotation of the fixed tube drives the arrayed cleaning bristles thereon to rotate, thereby realizing the rotation of the fixed tube around the impeller center while revolving, improving the cleaning efficiency of the primary filter plate, and the rotating cleaning bristles can carry out the particulate impurities in the filter holes of the primary filter plate, through the elastic connection between the disc and the filter cylinder, the disc is always subjected to an upward pushing force, which further acts on the gear, so that the fixed tube is always subjected to a pushing force towards the primary filter plate, so that the cleaning bristles closely adhere to the primary filter plate, avoiding the possibility of wear of the cleaning bristles during long-term use, which may cause the cleaning bristles to no longer adhere to the bottom of the primary filter plate after a period of operation, thereby affecting the cleaning effect of the primary filter plate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front three-dimensional structure schematic diagram of the present application.

[0019] Figure 2 It is a structure schematic diagram of the primary filter plate in the present application.

[0020] Figure 3 It is a structure schematic diagram of the present application in the middle section.

[0021] Figure 4 It is a structure schematic diagram of the blocking plate in the present application.

[0022] Figure 5 It is a structure schematic diagram of the annular groove and the first tooth groove in the present application.

[0023] Figure 6 It is a structure schematic diagram of the present application Figure 3 at A.

[0024] Figure 7 It is a structure schematic diagram of the present application Figure 5 at C.

[0025] Figure 8 It is a structure schematic diagram of the fixed tube in the present application.

[0026] Figure 9 It is a structure schematic diagram of the present application Figure 3 at B.

[0027] Figure 10 This is a schematic diagram of the semi-cylinder structure in this invention.

[0028] In the diagram: 1. Filter cartridge; 2. Inlet duct; 3. Outlet duct; 4. Primary filter plate; 5. Cleaning bristles; 6. Support plate; 7. Impeller; 71. Fixing cover; 72. Telescopic column; 8. Collar; 9. Notch; 10. Disc; 11. Ring; 12. Sealing plate; 13. Annular groove; 14. First tooth groove; 15. Rotating shaft; 16. Elastic plate; 17. Semi-cylinder; 18. Arc plate; 19. Strip groove; 20. Fixing pipe; 21. Gear; 22. Tooth; 23. Positioning rod; 24. Blade. Detailed Implementation

[0029] Please see Figures 1-10 In this embodiment of the invention, a gas filtration device for a production workshop includes a filter cylinder 1. An air inlet pipe 2 is fixedly arranged around the filter cylinder 1, an air outlet pipe 3 is arranged at the top of the filter cylinder 1, and a discharge port is arranged at the bottom of the filter cylinder 1. A primary filter plate 4 is arranged inside the filter cylinder 1. A medium-efficiency filter plate and a high-efficiency filter plate are arranged sequentially above the primary filter plate 4. The primary filter plate 4, the medium-efficiency filter plate, and the high-efficiency filter plate are all fixedly connected to the inner wall of the filter cylinder 1. A fixing pipe 20 is arranged at the bottom of the primary filter plate 4. Cleaning bristles 5 are arranged in an array around the fixing pipe 20. A driving component is arranged below the center of the fixing pipe 20. When the driving component rotates, it drives the fixing pipe 20 to rotate. When the fixing pipe 20 rotates, the cleaning bristles 5 clean the bottom of the primary filter plate 4, thereby preventing the bottom of the primary filter plate 4 from being blocked by impurities after long-term use, which would increase the wind resistance and affect the efficiency of the entire gas filtration device.

[0030] It should be noted that: the air inlet pipe 2 is located at the bottom of one side of the filter cylinder 1 and is fixedly connected to the suction pipe in the plastic box production workshop. In this way, when the suction pipe is activated to draw in air from the production workshop, it can be transported to the filter cylinder 1 through the air inlet pipe 2 for gas filtration. The primary filter plate 4 is located inside the filter cylinder 1 above the connection between the filter cylinder 1 and the air inlet pipe 2. Thus, when the gas drawn in through the air inlet pipe 2 passes through the primary filter plate 4, the medium-efficiency filter plate, and the high-efficiency filter plate in sequence, the gas in the production workshop is filtered. The primary filter plate 4, the medium-efficiency filter plate, the high-efficiency filter plate, and the suction pipe are all common structures used in the prior art for gas transportation and gas filtration in production workshops. The detailed working principle and related structure will not be described in detail here. The gas filtered by the primary filter plate 4, the medium-efficiency filter plate, and the high-efficiency filter plate is discharged through the air outlet pipe 3.

[0031] Please see Figures 2-7, preferably, the driving assembly comprises the impeller 7; the periphery of the impeller 7 is provided with a fixed cover 71, the bottom of the fixed cover 71 is fixedly provided with the support plate 6, the two ends of the support plate 6 away from the fixed cover 71 are fixedly connected with the inner wall of the filter cylinder 1, the top center of the impeller 7 is fixedly provided with the telescopic column 72, one end of the telescopic column 72 away from the impeller 7 is fixedly provided with the sleeve ring 8, the sleeve ring 8 is sleeved on the center periphery of the fixed pipe 20, in actual use, the impeller 7 is arranged in the center of the filter cylinder 1, and the central axis of the impeller 7 corresponds to the central axis of the filter cylinder 1, the impeller 7 is also arranged above the air inlet pipe 2, and the sleeve ring 8 and the fixed pipe 20 are rotationally connected; when the air inlet pipe 2 transports the gas into the filter cylinder 1, the gas moves from bottom to top in the filter cylinder 1, so that the impeller 7 moves upward and rotates, the rotation of the impeller 7 drives the fixed pipe 20 to rotate through the cooperation of the telescopic column 72 and the sleeve ring 8, the rotation of the fixed pipe 20 drives the bottom of the primary filter plate 4 to be cleaned through the cleaning hair 5, so that the bottom of the primary filter plate 4 is prevented from being blocked to affect the filtering efficiency of the gas, and the impurities and other particulate matters cleaned fall downward to the discharge port.

[0032] Further, one end of the fixed pipe 20 is fixedly provided with a connecting shaft in the center, one end of the connecting shaft away from the fixed pipe 20 is fixedly provided with a gear 21, an installation groove is arranged in the side wall of the filter cylinder 1, a disc 10 is arranged in the installation groove, the top of the disc 10 is provided with a first tooth groove 14 in transmission engagement with the gear 21, in actual use, the installation groove is arranged in the annular structure in the filter cylinder 1, the gear 21 is in the installation groove and is in engagement with the first tooth groove 14, so that when the fixed pipe 20 rotates, the fixed pipe 20 synchronously drives the gear 21 to revolve around the center of the impeller 7, and at the same time, the gear 21 rotates under the action of the first tooth groove 14, the rotation of the gear 21 drives the fixed pipe 20 to rotate through the connecting shaft, the rotation of the fixed pipe 20 drives the cleaning hair 5 arranged thereon to rotate, so that the fixed pipe 20 revolves around the center of the impeller 7 while rotating, the efficiency of cleaning the primary filter plate 4 is improved, and the particulate impurities in the filter holes of the primary filter plate 4 can be wrapped out through the rotating cleaning hair 5.

[0033] In order to make the disc 10 in gear 21 rotation is stable, will not rotate with gear 21, preferably, the outer periphery of the disc 10 is provided with the notch 9, the notch 9 is arranged in the form of a ring along the center of the disc 10 is provided with a plurality of groups, the installation groove is fixedly provided with the vertical plate which is slidably fitted with the notch 9, the bottom of the disc 10 and the filter cylinder 1 are connected by the spring, in actual use, through the sliding fit of the vertical plate and the notch 9, the disc 10 can only move in the vertical direction in the installation groove, thereby avoiding the problem that the disc 10 may rotate with the gear 21 and cannot rotate the gear 21, and through the elastic connection between the disc 10 and the filter cylinder 1, the disc 10 is always pushed upward, thereby acting on the gear 21, so as to achieve the purpose that the fixed tube 20 is always pushed toward the primary filter plate 4, so that the cleaning hair 5 is closely attached to the primary filter plate 4, avoiding the possibility that the cleaning hair 5 may be worn during long-term use, thereby affecting the cleaning effect of the primary filter plate 4 after a period of operation.

[0034] Please refer to Figure 4 、 Figure 6 , preferably, the disc 10 is provided with a blocking plate 12 close to the top side wall of the fixed tube 20, the blocking plate 12 is rotatably connected between the connecting shaft, the top of the blocking plate 12 is slidably attached to the bottom of the primary filter plate 4, in use, the blocking plate 12 is provided to block one side of the installation groove, avoiding the impurities in the gas in the filter cylinder 1 from falling into the first tooth groove 14 on the top of the disc 10, thereby avoiding the problem that the gear 21 and the first tooth groove 14 may be stuck.

[0035] The blocking plate 12 comprises an outer plate and an inner plate; the bottom of the outer plate is slidably attached to the top of the disc 10, the top of the outer plate is provided with a containing groove, the inner plate is slidably arranged in the containing groove, and the bottom of the inner plate and the containing groove are provided with a spring, the top of the inner plate is slidably attached to the bottom of the primary filter plate 4, and the outer plate is rotatably connected with the connecting shaft, so that when the cleaning hair 5 is worn, the disc 10 is pushed by the spring to move the fixed tube 20 close to the primary filter plate 4, so that the cleaning hair 5 is again attached to the bottom of the primary filter plate 4, and during the movement, since the outer plate is rotatably connected with the connecting shaft, the movement of the fixed tube 20 will synchronously drive the movement of the outer plate, thereby making the inner plate move into the containing groove and shrink, so as not to affect the movement of the fixed tube 20; of course, the outer plate can also be arranged outside the installation groove, that is, the outer plate is slidably attached to the inner wall of the filter cylinder 1, in this state, the bottom of the outer plate is lower than the bottom of the installation groove, so that after the fixed tube 20 moves upward, the outer plate can block one side of the installation groove, thereby avoiding the entry of external impurities and other particles into the installation groove.

[0036] Please refer to Figures 6-10Preferably, the rotating shaft 15 is rotatably connected in the fixed tube 20, and the fixed tube 20 is provided with an opening at the end away from the gear 21, and the rotating shaft 15 is provided with the blades 24 at the end close to the opening, and the blades 24 are arranged in multiple groups in a ring shape along the center of the rotating shaft 15, and the side wall of the fixed tube 20 is provided with the strip-shaped grooves 19 arranged in multiple groups in a ring shape along the center of the fixed tube 20, and it is to be noted that the central axis of the rotating shaft 15 corresponds to the central axis of the fixed tube 20, and the strip-shaped grooves 19 penetrate the side wall of the fixed tube 20 and are arranged between the adjacent two groups of cleaning hairs 5.

[0037] In actual use, when the air inlet pipe 2 delivers the gas into the filter cartridge 1 for gas filtering, the impeller 7 rotates under the action of the gas, and the fixed tube 20 rotates through the telescopic column 72 and the sleeve ring 8, so that the cleaning work on the bottom of the primary filter plate 4 is completed through the cleaning hairs 5. In the process of rotation of the fixed tube 20, the rotating shaft 15 also rotates, and the rotating shaft 15 drives the blades 24 to rotate, and the blades 24 rotate to achieve the purpose of air extraction in the fixed tube 20, so that the gas in the fixed tube 20 is delivered to the opening for discharge, thereby sucking the external gas through the strip-shaped grooves 19. Under the impact of the airflow, the impurities and other particulate matters that may be attached to the cleaning hairs 5 are sucked into the fixed tube 20, and then discharged to the opening of the fixed tube 20 under the action of the blades 24, and finally fall into the discharge port. Through the arrangement of the strip-shaped grooves 19 and the blades 24, a simple self-cleaning effect of the cleaning hairs 5 is achieved.

[0038] Further, preferably, the rotating shaft 15 is fixedly provided with the gear teeth 22 at the end away from the gear 21, the top of the disc 10 is fixedly connected with the ring 11, the side close to the rotating shaft 15 of the ring 11 is provided with the annular groove 13, the gear teeth 22 are arranged in the annular groove 13, and the bottom of the annular groove 13 is provided with the second gear groove meshing with the gear teeth 22. In actual use, the end of the rotating shaft 15 away from the gear 21 rotates through the side wall of the blocking plate 12, the top of the ring 11 is slightly higher than the top end of the fixed tube 20 in height, and does not affect the upward movement of the fixed tube 20. In the initial state, the gear teeth 22 are meshed with the second gear groove. When the fixed tube 20 rotates around the impeller 7, the rotating shaft 15 revolves around the impeller 7 with the fixed tube 20, so that the gear teeth 22 rotate in the annular groove 13. Through the arrangement of the second gear groove, the gear teeth 22 can rotate around the impeller 7 while revolving. The rotating shaft 15 rotates to drive the blades 24 to rotate. At this time, the rotation of the blades 24 discharges the gas in the fixed tube 20 to the opening of the fixed tube 20, so that a negative pressure is generated in the fixed tube 20, and then external gas is sucked through the strip-shaped grooves 19.

[0039] Further, preferably, the slidingly fitted arc-shaped plate 18 is fixed in the fixed tube 20, one end of the arc-shaped plate 18 close to the tooth 22 is fixedly provided with a positioning rod 23 in a central symmetry, the other end of the positioning rod 23 away from the arc-shaped plate 18 is fixedly connected with the blocking plate 12, the arc-shaped plate 18 is a three-tenths circular structure, and under the action of the positioning rod 23, the relative position of the arc-shaped plate 18 is in a fixed state, that is, under the action of the arc-shaped plate 18, only the fixed tube 20 can be in communication with the outside under the self-rotation of the fixed tube 20 close to the strip-shaped groove 19 of the primary filter plate 4, which further increases the adsorption force of the strip-shaped groove 19 in communication with the fixed tube 20, so that the particles such as impurities on the cleaning hair 5 or even the primary filter plate 4 are better sucked into the fixed tube 20.

[0040] Please refer to Figure 10 , preferably, the inner wall of the arc-shaped plate 18 is fixedly provided with a semicircular cylinder 17, the outer periphery of the rotating shaft 15 is fixedly provided with an elastic plate 16, the elastic plate 16 is arranged in a ring array along the center of the rotating shaft 15, then the plurality of elastic plates 16 are arranged in multiple groups in a horizontal direction on the rotating shaft 15, the length of the semicircular cylinder 17 is greater than the horizontal length of the multiple groups of elastic plates 16 on the rotating shaft 15, and in actual use, when the rotating shaft 15 rotates, the rotating shaft 15 drives the elastic plate 16 to rotate, the elastic plate 16 rotates and then intermittently cooperates with the semicircular cylinder 17, when the elastic plate 16 cooperates with the semicircular cylinder 17, the elastic plate 16 will be bent and deformed, and when the elastic plate 16 is separated from the semicircular cylinder 17, the elastic plate 16 will be elastically reset, thereby knocking the arc-shaped plate 18 and making the arc-shaped plate 18 vibrate, and since the arc-shaped plate 18 is fitted with the inner wall of the fixed tube 20, the vibration will be transmitted to the fixed tube 20, so that the impurities on the cleaning hair 5 are better shaken off, the cleaning efficiency of the cleaning hair 5 on the primary filter plate 4 is increased, and the service life is prolonged.

Claims

1. A gas filtering device for a production workshop, comprising a filtering cylinder, an air inlet pipe is fixedly arranged on the periphery of the filtering cylinder, an air outlet pipe is arranged on the top of the filtering cylinder, a discharge port is arranged on the bottom of the filtering cylinder, a primary filter plate is arranged in the filtering cylinder, a medium filter plate and a high filter plate are sequentially arranged above the primary filter plate; characterized in that, The bottom of the primary filter plate is provided with a fixing pipe, the periphery of the fixing pipe is provided with cleaning hair, and the center of the fixing pipe is provided below the driving assembly. When the driving assembly rotates, the driving assembly drives the fixing pipe to rotate; The fixing pipe is rotatably connected with a rotating shaft, one end of the fixing pipe away from the gear is provided with an opening, the periphery of one end of the rotating shaft close to the opening is provided with a blade, the blade is arranged in a ring array along the center of the rotating shaft, and the side wall of the fixing pipe is provided with a strip-shaped groove; One end of the fixing pipe is fixedly provided with a connecting shaft at the center, one end of the connecting shaft away from the fixing pipe is fixedly provided with a gear, the side wall of the filter cylinder is provided with a mounting groove, the mounting groove is provided with a disc, and the top of the disc is provided with a first tooth groove in transmission engagement with the gear; One end of the rotating shaft away from the gear is fixedly provided with a tooth, the top of the disc is fixedly connected with a ring, one side of the ring close to the rotating shaft is provided with a ring-shaped groove, the tooth is arranged in the ring-shaped groove, and the bottom of the ring-shaped groove is provided with a second tooth groove in engagement with the tooth; The fixing pipe is slidably attached with an arc-shaped plate, one end of the arc-shaped plate close to the tooth is fixedly provided with a positioning rod in central symmetry, and the other end of the positioning rod away from the arc-shaped plate is fixedly connected with a blocking plate.

2. A gas filtering device for a production plant according to claim 1, characterized in that, The driving assembly comprises a impeller; the periphery of the impeller is provided with a fixed cover, the bottom of the fixed cover is fixedly provided with a support plate, the two ends of the support plate away from the fixed cover are fixedly connected with the inner wall of the filter cylinder, the top center of the impeller is fixedly provided with a telescopic column, one end of the telescopic column away from the impeller is fixedly provided with a sleeve ring, and the sleeve ring is sleeved on the periphery of the center of the fixing pipe.

3. A gas filtering device for a production plant according to claim 2, characterized in that, The periphery of the disc is provided with an opening, the opening is arranged in a ring array along the center of the disc, a vertical plate slidably matched with the opening is fixedly arranged in the mounting groove, and the bottom of the disc and the filter cylinder are elastically connected.

4. A gas filtering device for a production plant according to claim 3, characterized in that, The top side wall of the disc close to the fixing pipe is provided with a blocking plate, the blocking plate is rotatably connected with the connecting shaft, and the top of the blocking plate is slidably attached with the bottom of the primary filter plate.

5. A gas filtering device for a production plant according to claim 4, characterized in that, The blocking plate comprises an outer plate and an inner plate; the bottom of the outer plate is slidably attached with the top of the disc, the top of the outer plate is provided with a containing groove, the inner plate is slidably arranged in the containing groove, a spring is arranged between the bottom of the inner plate and the containing groove, the top of the inner plate is slidably attached with the bottom of the primary filter plate, and the outer plate is rotatably connected with the connecting shaft.

6. A gas filtering device for a production plant according to claim 5, characterized in that, The inner wall of the arc-shaped plate is fixedly provided with a semicircular column at the bottom, and the periphery of the rotating shaft is fixedly provided with an elastic plate.

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