CN216188956U - Reclaimed rubber batching conveyor - Google Patents

Abstract

The utility model relates to the technical field of rubber regeneration equipment, in particular to a reclaimed rubber batching and conveying device, which aims to overcome the defects of complex batching and inaccurate batching in the prior art and is mainly realized by the following technical scheme: a reclaimed rubber batching and conveying device comprises: the device comprises a main stock bin, a discharging device and a dust removing device, wherein the main stock bin is connected with the discharging device; the discharging device comprises a plurality of switching valves, a plurality of feeding hoppers and a main feeding pipe, the main feeding pipe is connected with the feeding hoppers and the main bin, the switching valves are arranged on the main feeding pipe, and the switching valves are in communication control connection with the control device; dust collector is connected with discharging device, and dust collector still is connected with controlling means communication control, and dust collector includes dust remover, cyclone, exhaust column and roots vacuum pump, and it is convenient to set up the discharging device ejection of compact, and convenient to use and material ratio are accurate.

Description

Reclaimed rubber batching conveyor

Technical Field

The utility model relates to the technical field of rubber regeneration equipment, in particular to a reclaimed rubber batching and conveying device.

Background

The waste rubber is crushed and then needs to be stored in a storage bin through a conveying system, and then is proportioned and transported according to the requirement to be subsequently processed. The pulverized rubber particles are divided into powder, granules or mixtures, and the rubber particles are easy to generate dust due to the uniqueness of the state, so special treatment is needed in the transportation process. The existing conveying and batching system is single in arrangement, continuous in process flow part, and needs to convey in stages, and even possibly needs to manually convey in the middle. Therefore, the problems of high conveying cost, low production efficiency and the like are caused. The existing rubber particles are subjected to batching operation when needing to be used, but the existing batching device is difficult to discharge materials from a discharge port at one time, and the problem of conveying efficiency reduction caused by the fact that part of the materials are always circulated in the batching device possibly exists; in addition, when the rubber particles are used, only one rubber particle cannot be used independently, and the rubber particles with various different proportions are combined and dispensed, so that the proportioning ratio of the rubber particles needs to be accurately controlled. Therefore, the reclaimed rubber batching and conveying device provided by the utility model can be used for accurately batching and conveniently conveying reclaimed rubber.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defects of complex material proportioning and inaccurate proportion in the prior art, thereby providing a reclaimed rubber batching and conveying device.

The technical purpose of the utility model is realized by the following technical scheme:

a reclaimed rubber batching and conveying device comprises:

the system comprises general storage bins, wherein the general storage bins are arranged in parallel and are arranged in groups of two, each general storage bin is provided with a discharge port, the discharge ports are connected with a discharge device, a control device is arranged beside the general storage bins, and the control device is in communication control connection with the discharge device;

the discharging device comprises a plurality of switching valves, a plurality of feeding hoppers and a total feeding pipe, the total feeding pipe is connected with the feeding hoppers and the total feeding bin, the total feeding pipe comprises a discharging pipe and a feeding pipe, the discharging pipe is communicated with the total feeding bin, the feeding pipe is communicated with the feeding hoppers, the switching valves are arranged on the total feeding pipe and are in communication control connection with a control device, and each switching valve comprises a discharging switching valve, a first switching valve, a second switching valve and a third switching valve;

the dust removal device is connected with the discharging device and is also in communication control connection with the control device, the dust removal device comprises a dust remover, a cyclone separator, an exhaust pipe and a Roots vacuum pump, the cyclone separator is communicated with the feeding hopper, the exhaust pipe is communicated with the cyclone separator and the dust remover, and the Roots vacuum pump is connected with the dust remover.

By adopting the technical scheme, the main material bin is arranged for storing different types of rubber material particles, the main material bin is connected with the discharging device, discharging is convenient and quick in use, different material ratios are provided for different working units through the matching of the switching valve, the feeding hopper and the main feeding pipe, the switching valve is in communication control connection with the control device, use is convenient, accurate material ratio is guaranteed, and manual operation is saved; in addition, discharging device has still additionally increased dust collector, reduces the diffusion of dust through using dust collector, has the characteristics of security and environmental protection.

Furthermore, each discharge port extends to form a discharge branch pipe, a rotary air locking valve is further arranged on each discharge branch pipe, the two discharge branch pipes are connected in series to form a discharge pipe, the discharge pipe is communicated with a feed pipe, a pipeline viewing mirror is coaxially arranged on the discharge pipe, and a discharge switching valve is arranged at the communication position of the discharge pipe and the feed pipe.

By adopting the technical scheme, the discharging pipes are formed by the discharging branch pipes, so that each main storage bin is ensured to be connected with a pipeline for discharging, and the discharging pipes are provided with pipeline sight glasses for observing the flowing reaction condition of materials, monitoring production and ensuring smooth material discharging; the rotary air locking valve can realize quantitative feeding of the main material bin and ensure stable air pressure in the main material bin; the discharging switching valve at the discharging pipe and the feeding pipe is convenient for switching different materials, and the smoothness of the subsequent proportioning process is ensured.

Furthermore, the feeding pipe is connected with the feeding hopper through the cyclone separator, the feeding hopper comprises a first hopper, a second hopper, a third hopper and a fourth hopper, the feeding pipe is respectively extended with a first distributing pipe communicated with the first hopper, a second distributing pipe communicated with the second hopper, a third distributing pipe communicated with the third hopper and a fourth distributing pipe communicated with the fourth hopper, and the first distributing pipe, the second distributing pipe and the third distributing pipe are respectively provided with a first switching valve, a second switching valve and a third switching valve.

Through adopting above-mentioned technical scheme, set up four hoppers, the implementation of the prescription menu of being convenient for, through the cooperation operation of diverter valve and branch material pipe, carry the ratio to different hoppers with the material in the total feed bin to supply subsequent reclaimed rubber work unit.

Furthermore, the cyclone separator comprises a first separator connected with the first hopper, a second separator connected with the second hopper, a third separator connected with the third hopper and a fourth separator connected with the fourth hopper, and the exhaust pipe is extended with a first branch pipe communicated with the first separator, a second branch pipe communicated with the second separator, a third branch pipe communicated with the third separator and a fourth branch pipe communicated with the fourth separator.

Through adopting above-mentioned technical scheme, set up cyclone, ensure that rubber material granule all gets into the material fill in, adopt the sealed feeding mode who sets up simultaneously, avoid the dust diffusion, guarantee operational environment's clean and tidy, the exhaust column will let in the dust remover through material separation's air and further carry out the dust removal operation.

Further, total feed bin installation is fixed on the support, the support bottom is equipped with the walking passageway, be equipped with horizontal guardrail in the vertical direction of support, still be equipped with agitating unit in the total feed bin, agitating unit perpendicular to total feed bin axis and setting are in total feed bin bottom, total feed bin bottom lateral wall still is fixed with the vibrator.

Through adopting above-mentioned technical scheme, the support provides the support for total feed bin, and the walking passageway reduces total feed bin area and provides staff operating space simultaneously, sets up agitating unit and the vibrator and is convenient for the rubber granule ejection of compact.

Further, vibrator and agitating unit and controlling means communication control are connected, agitating unit is including fixing the rotating electrical machines outside total feed bin lateral wall, the rotation axis fixed with the rotating electrical machines output shaft and fixing the helical blade on the rotation axis, total feed bin is close to agitating unit one side and still is provided with the visual window.

By adopting the technical scheme, the vibrator and the additional stirring device can effectively prevent rubber particles from being accumulated at the inlet and outlet in the processes of feeding and discharging, thereby being beneficial to smooth transportation of the rubber particles and simultaneously ensuring the stability of the whole transportation condition; the visual window is used for observing the discharging condition.

Furthermore, each main storage bin is also communicated with an air inlet branch pipe, the two air inlet branch pipes are connected in series to form an air inlet pipe, and the air inlet pipe is connected with the Roots blower.

Through adopting above-mentioned technical scheme, the air-supply line realizes the wind pressure with the cooperation of roots's fan and carries, reaches the convenient purpose of material transport.

Furthermore, a filtering piece is fixed in the air inlet pipe, the filtering piece is a filter screen, the diameter of the filter screen is smaller than that of the conveyed material, and the size of the inner section of the filtering piece is consistent with that of the inner section of the air inlet pipe and the filtering piece is arranged on one side close to the Roots blower.

Through adopting above-mentioned technical scheme, set up and filter in avoiding the material to get into the air-intake pipe, influence the wind pressure and carry, also avoid dust pollution, guarantee this conveyor's security and stability.

In summary, the technical scheme of the utility model has the following advantages:

1. the reclaimed rubber batching and conveying device provided by the utility model is provided with the main feed bin for storing different types of rubber material particles, and the main feed bin is matched with the switching valve, the feeding hopper and the main feeding pipe, so that different material ratios are provided for different working units, the use is convenient, and the accurate material ratio is ensured.

2. According to the reclaimed rubber batching and conveying device provided by the utility model, the discharging device is additionally connected with the dust removal device, and the dust removal device is used for reducing the dust diffusion and avoiding the dust pollution of the working environment, so that the construction environment has the characteristics of safety and environmental protection.

3. The reclaimed rubber batching and conveying device provided by the utility model is provided with the vibrator and the additional stirring device, so that the rubber particles can be smoothly conveyed, the smooth discharge of the rubber particles is ensured, and the stability of the whole conveying condition is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of an overall structure of a reclaimed rubber batching and conveying device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial structure of a total silo according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional structural view of a total silo provided in one embodiment of the present invention;

fig. 4 is a schematic structural diagram of a discharging device and a dust removing device provided in an embodiment of the present invention.

Description of reference numerals:

1. a total storage bin; 11. a discharge port; 111. discharging and pipe dividing; 112. a rotary air locking valve; 12. a stirring device; 121. a rotating electric machine; 122. a rotating shaft; 123. a helical blade; 13. a vibrator; 14. a visual window; 15. an air inlet pipe; 151. air inlet branch pipes; 1511. a filter member; 16. a Roots blower; 2. a support; 21. a walking channel; 22. a guardrail; 3. a discharging device; 31. switching valves; 311. a discharging switching valve; 312. a first switching valve; 313. a second switching valve; 314. a third switching valve; 32. a feeding hopper; 321. a first hopper; 322. a second hopper; 323. a third hopper; 324. a fourth hopper; 33. a main feed pipe; 331. a discharge pipe; 3311. a pipeline sight glass; 332. a feed pipe; 3321. a first material dividing pipe; 3322. a second material dividing pipe; 3323. a third distributing pipe; 3324. a fourth distributing pipe; 4. a dust removal device; 41. a dust remover; 42. a cyclone separator; 421. a first separator; 422. a second separator; 423. a third separator; 424. a fourth separator; 43. an exhaust pipe; 431. a first branch pipe; 432. a second branch pipe; 433. a third branch pipe; 434. a fourth branch pipe; 44. a Roots vacuum pump; 5. and a control device.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The utility model provides a reclaimed rubber batching conveyor, as shown in fig. 1 and fig. 2, including total feed bin 1, discharging device 3 and dust collector 4, total feed bin 1 is provided with four and two liang of settings side by side, total 1 installation of feed bin is fixed on support 2, 2 bottoms of support are equipped with walking passageway 21, be equipped with horizontal guardrail 22 on the 2 vertical directions of support, still be equipped with agitating unit 12 in total feed bin 1, 1 axis of agitating unit 12 perpendicular to total feed bin and setting are in total 1 bottom of feed bin, 1 bottom lateral wall of total feed bin still is fixed with vibrator 13, support 2 provides the support for total feed bin 1, walking passageway 21 reduces total 1 area of feed bin and provides staff operating space simultaneously, set up the rubber granule ejection of compact of being convenient for of agitating unit 12 and vibrator 13.

As shown in fig. 1, the discharging device 3 comprises a plurality of switching valves 31, a plurality of feeding hoppers 32 and a total feeding pipe 33, the total feeding pipe 33 is connected with the feeding hoppers 32 and the total storage bin 1, the switching valves 31 are arranged on the total feeding pipe 33, the switching valves 31 are in communication control connection with the control device 5, the dust removing device 4 is connected with the discharging device 3, the dust removing device 4 is also in communication control connection with the control device 5, the dust removing device 4 comprises a dust remover 41, a cyclone 42, an exhaust pipe 43 and a roots vacuum pump 44, the cyclone 42 is communicated with the feeding hoppers 32, the exhaust pipe 43 is communicated with the cyclone 42 and the dust remover 41, the roots vacuum pump 44 is connected with the dust remover 41, the total storage bin 1 is arranged to store different types of rubber material particles, the total storage bin 1 is connected with the discharging device 3, discharging is convenient and fast in use, and through the matching of the switching valves 31, the feeding hoppers 32 and the total feeding pipe 33, different material ratios are provided for different working units, the switching valve 31 is in communication control connection with the control device 5, the use is convenient, the accurate material ratio is ensured, and the manual operation is saved; in addition, discharging device 3 has still additionally increased dust collector 4, reduces the diffusion of dust through using dust collector 4, and the construction environment has the characteristics of security and environmental protection.

As shown in fig. 1 and 2, each main storage bin 1 is further communicated with an air inlet branch pipe 151, the two air inlet branch pipes 151 are connected in series to form an air inlet pipe 15, the air inlet pipe 15 is connected with a roots blower 16, and the air inlet pipe 15 is matched with the roots blower 16, so that air pressure conveying is realized, and the purpose of convenience and quickness in material conveying is achieved. The air-supply line 15 internal fixation has a filtration piece 1511, filters 1511 and just filters the diameter that mesh aperture is less than the transported substance for the filter screen, filters 1511 and air-supply line 15 internal cross section size unanimous and sets up in being close to roots's fan 16 one side, sets up to filter 1511 and avoids the material to get into air-supply line 15 in, influences the wind pressure and carries, also avoids dust pollution, guarantees this conveyor's security and stability.

As shown in fig. 1, fig. 2 and fig. 3, the vibrator 13 and the stirring device 12 are in communication control connection with the control device 5, the stirring device 12 includes a rotating motor 121 fixed outside the side wall of the total storage bin 1, a rotating shaft 122 fixed with an output shaft of the rotating motor 121, and a helical blade 123 fixed on the rotating shaft 122, a visual window 14 is further arranged on one side of the total storage bin 1 close to the stirring device 12, the vibrator 13 and the additional stirring device 12 are arranged to effectively prevent rubber particles from being accumulated at the inlet and outlet in the processes of feeding and discharging, thereby being beneficial to smooth transportation of the rubber particles and simultaneously ensuring the stability of the whole transportation condition; the visual window 14 is convenient for observing the discharging condition.

As shown in fig. 1 and 4, each discharge port 11 extends to form a discharge branch pipe 111, a rotary air lock valve 112 is further disposed on each discharge branch pipe 111, two discharge branch pipes 111 are connected in series to form a discharge pipe 331, the discharge pipe 331 is communicated with a feed pipe 332, a pipe view mirror 3311 is coaxially disposed on the discharge pipe 331, a discharge switch valve 311 is disposed at a communication position between the discharge pipe 331 and the feed pipe 332, the two discharge branch pipes 111 form the discharge pipe 331, it is ensured that each main storage bin 1 is provided with a connecting pipe for discharging, a pipe view mirror 3311 is disposed on the discharge pipe 331, and is used for observing a material flow reaction condition, monitoring production, and ensuring smooth material discharge; the rotary air locking valve 112 can realize quantitative feeding of the main storage bin 1 and ensure stable air pressure in the main storage bin 1; the discharging switching valve 311 at the discharging pipe 331 and the feeding pipe 332 facilitates the switching of different material conveying, and ensures the smoothness of the subsequent proportioning process.

As shown in fig. 1 and 4, the main feeding pipe 33 includes a discharging pipe 331 and a feeding pipe 332, the discharging pipe 331 is communicated with the main bin 1, the feeding pipe 332 is communicated with the feeding hopper 32, the feeding pipe 332 is connected with the feeding hopper 32 through a cyclone 42, the feeding hopper 32 includes a first hopper 321, a second hopper 322, a third hopper 323 and a fourth hopper 324, the feeding pipe 332 is respectively extended with a first distributing pipe 3321 communicated with the first hopper 321, a second distributing pipe 3322 communicated with the second hopper 322, a third distributing pipe 3323 communicated with the third hopper 323 and a fourth distributing pipe 3324 communicated with the fourth hopper 324, the first distributing pipe 3321, the second distributing pipe 3322 and the third distributing pipe 3323 are respectively provided with a first switching valve 312, a second switching valve 313 and a third switching valve 314, the cyclone 42 includes a first separator 421 connected with the first hopper 321, a second separator 422 connected with the second hopper 322, A third separator 423 connected to the third hopper 323 and a fourth separator 424 connected to the fourth hopper 324, and the exhaust duct 43 is extended with a first branch pipe 431 communicated with the first separator 421, a second branch pipe 432 communicated with the second separator 422, a third branch pipe 433 communicated with the third separator 423 and a fourth branch pipe 434 communicated with the fourth separator 424.

As shown in fig. 1 and 4, in use, if the first hopper 321 needs materials of the two main silos 1 on the left, the rotary air lock valve 112 is started to control the materials to be quantitatively discharged according to the required dosage, then the materials pass through the discharge pipe 331, the discharge switching valve 311 switches to communicate the discharge pipe 331 of the main silo 1 on the left with the feed pipe 332, then the first switching valve 312 switches to communicate the feed pipe 332 with the first branch pipe 3321, at this time, the second switching valve 313 and the third switching valve 314 do not act, the second branch pipe 3322, the third branch pipe 3323 and the fourth branch pipe 3324 do not communicate with the feed hopper 32, the materials firstly enter the first separator 421 through the first branch pipe 3321 to perform gas-material separation, the materials sink to enter the first hopper 321, the gas enters the first branch pipe 431 and then enters the dust remover 41 along the exhaust pipe 43 to perform dust removal operation, four hoppers are provided, which are convenient to implement on site according to the set recipe, through the cooperation operation of different diverter valves and different branch material pipes, carry the ratio to different hoppers with the material in total feed bin 1 to supply subsequent reclaimed rubber work unit.

The working principle and the using method of the reclaimed rubber batching and conveying device are as follows: the main material bin 1, the discharging device 3 and the dust removing device 4 are connected in sequence through pipelines, and different types of rubber materials are stored in the main material bin 1; when the device is used, a signal is sent to the control device 5 according to the requirement of the feeding hopper 32, the control device 5 is connected with different switching valves 31, the communication between the discharge switching valve 311, the first switching valve 312, the second switching valve 313 and the third switching valve 314 and the discharge pipe 331, the first distributing pipe 3321, the second distributing pipe 3322 and the third distributing pipe 3323 is respectively controlled according to the formulated different formula menu requirements, and meanwhile, the first separator 421, the second separator 422, the third separator 423 and the fourth separator 424 are started according to the communication between the first distributing pipe 3321, the second distributing pipe 3322, the third distributing pipe 3323 and the fourth distributing pipe 3324, so that the dust removal operation during material distribution is performed.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (8)

1. The utility model provides a reclaimed rubber batching conveyor which characterized in that includes:

the device comprises a total stock bin (1), wherein the total stock bin (1) is provided with four stock bins in parallel and is arranged in a group of every two stock bins, each total stock bin (1) is provided with a discharge hole (11), a discharge device (3) is connected at the discharge hole (11), a control device (5) is further arranged beside the total stock bin (1), and the control device (5) is in communication control connection with the discharge device (3);

the discharge device (3) comprises a plurality of switching valves (31), a plurality of feeding hoppers (32) and a total feeding pipe (33), the total feeding pipe (33) is connected with the feeding hoppers (32) and a total storage bin (1), the total feeding pipe (33) comprises a discharge pipe (331) and a feeding pipe (332), the discharge pipe (331) is communicated with the total storage bin (1), the feeding pipe (332) is communicated with the feeding hoppers (32), the switching valves (31) are arranged on the total feeding pipe (33), the switching valves (31) are in communication control connection with a control device (5), and the switching valves (31) comprise a discharge switching valve (311), a first switching valve (312), a second switching valve (313) and a third switching valve (314);

the dust removal device (4) is connected with the discharging device (3), the dust removal device (4) is further connected with the control device (5) in a communication control mode, the dust removal device (4) comprises a dust remover (41), a cyclone separator (42), an exhaust pipe (43) and a Roots vacuum pump (44), the cyclone separator (42) is communicated with the feeding hopper (32), the exhaust pipe (43) is communicated with the cyclone separator (42) and the dust remover (41), and the Roots vacuum pump (44) is connected with the dust remover (41).

2. The reclaimed rubber ingredient conveying device according to claim 1, wherein each discharge port (11) extends to form a discharge branch pipe (111), a rotary air-lock valve (112) is further arranged on each discharge branch pipe (111), two discharge branch pipes (111) are connected in series to form a discharge pipe (331), the discharge pipe (331) is communicated with the feed pipe (332), a pipeline view mirror (3311) is coaxially arranged on the discharge pipe (331), and a discharge switching valve (311) is arranged at a position where the discharge pipe (331) is communicated with the feed pipe (332).

3. The reclaimed rubber batching and conveying device according to claim 2, wherein the feeding pipe (332) is connected with a feeding hopper (32) through a cyclone (42), the feeding hopper (32) comprises a first hopper (321), a second hopper (322), a third hopper (323) and a fourth hopper (324), the feeding pipe (332) is respectively extended with a first distributing pipe (3321) communicated with the first hopper (321), a second distributing pipe (3322) communicated with the second hopper (322), a third distributing pipe (3323) communicated with the third hopper (323) and a fourth distributing pipe (3324) communicated with the fourth hopper (324), and the first distributing pipe (3321), the second distributing pipe (3322) and the third distributing pipe (3323) are respectively provided with a first switching valve (312), a second switching valve (313) and a third switching valve (314).

4. A reclaimed rubber compounding and conveying apparatus according to claim 3, wherein the cyclone separator (42) comprises a first separator (421) connected to the first hopper (321), a second separator (422) connected to the second hopper (322), a third separator (423) connected to the third hopper (323), and a fourth separator (424) connected to the fourth hopper (324), and the exhaust duct (43) is extended with a first branch duct (431) communicated with the first separator (421), a second branch duct (432) communicated with the second separator (422), a third branch duct (433) communicated with the third separator (423), and a fourth branch duct (434) communicated with the fourth separator (424).

5. The reclaimed rubber batching and conveying device according to claim 4, wherein the main bin (1) is fixedly arranged on a support (2), a walking channel (21) is arranged at the bottom of the support (2), a horizontal guardrail (22) is arranged in the vertical direction of the support (2), a stirring device (12) is further arranged in the main bin (1), the stirring device (12) is perpendicular to the axis of the main bin (1) and is arranged at the bottom of the main bin (1), and a vibrator (13) is further fixed on the outer side wall of the bottom of the main bin (1).

6. A reclaimed rubber batching and conveying device according to claim 5, wherein the vibrator (13) and the stirring device (12) are in communication control connection with the control device (5), the stirring device (12) comprises a rotating motor (121) fixed outside the side wall of the total storage bin (1), a rotating shaft (122) fixed with an output shaft of the rotating motor (121) and a helical blade (123) fixed on the rotating shaft (122), and a visual window (14) is further arranged on one side of the total storage bin (1) close to the stirring device (12).

7. The reclaimed rubber batching and conveying device according to claim 6, wherein each main bin (1) is further communicated with an air inlet branch pipe (151), two air inlet branch pipes (151) are connected in series to form an air inlet pipe (15), and the air inlet pipe (15) is connected with a Roots blower (16).

8. The reclaimed rubber batching and conveying device according to claim 7, wherein a filter element (1511) is fixed in the air inlet pipe (15), the filter element (1511) is a filter screen, the diameter of the filter screen is smaller than the diameter of the conveyed material, and the filter element (1511) is consistent with the inner cross section of the air inlet pipe (15) in size and is arranged on the side close to the Roots blower (16).

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