Rotary screening device for tobacco particles

Abstract

The utility model discloses a rotary screening device for tobacco particles. The rotary screening device comprises a shell, a screen drum, a feeding pipe, a feeding hopper, an outer cover, a first discharging pipe and a first driving assembly. The shell is of a box body structure with an opening in the bottom end; the screen drum is frustum-shaped and is of a structure with two open ends; the screen drum is horizontally arranged in the shell, and the two ends of the screen drum penetrate through the opposite side walls of the shell and are rotationally connected with the corresponding side walls. The feeding pipe is located outside the shell and located on one side of the small opening end of the screen drum, and the first end of the feeding pipe is fixedly connected with the shell and communicates with the small opening end of the screen drum; an opening in the bottom end of the feeding hopper is communicated and fixedly connected with the second end of the feeding pipe; the outer cover is located outside the shell and covers the large opening end of the screen drum, and the outer cover is fixedly connected with the outer wall of the shell; the top end of the first discharging pipe is fixedly connected with the bottom surface of the outer cover, and the first discharging pipe is communicated with the outer cover; the first driving assembly is used for driving the screen drum to rotate. The problem that a large amount of noise and dust are generated in the tobacco particulate matter screening process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco processing equipment, in particular to a rotary screening device for tobacco particles. Background Art

[0002] In the process of cigarette production, tobacco particles need to be screened in order to remove impurities mixed in during tobacco harvesting, transportation and storage. By screening tobacco particles, the particles can separate impurities with lower density and larger agglomerated impurities, thus facilitating subsequent production.

[0003] At present, vibrating screens or electromagnetic screens are usually used to screen tobacco particles. However, vibrating screens and electromagnetic screens will generate a lot of noise and tobacco particle dust during operation, which is not good for the health of workers, and it is also difficult to remove agglomerated impurities with a density similar to that of tobacco. Utility Model Content

[0004] To solve at least one aspect of the above problems, the utility model provides a rotary screening device for tobacco particulate matter, comprising a shell, a screen drum, a feed pipe, a feed hopper, an outer cover, a first discharge pipe, and a first drive assembly; the shell is a box structure with an opening at the bottom; the screen drum is in a cone shape and is a structure with openings at both ends; the screen drum is horizontally arranged in the shell, and both ends of the screen drum penetrate the opposite side walls of the shell and are rotatably connected to the corresponding side walls; the feed pipe is located outside the shell and on the side of the small-mouth end of the screen drum, and the first end of the feed pipe is fixedly connected to the shell and communicated with the small-mouth end of the screen drum; the bottom end opening of the feed hopper is communicated with the second end of the feed pipe and is fixedly connected; the outer cover is located outside the shell and the cover is arranged on the large-mouth end of the screen drum, and the outer cover is fixedly connected to the outer wall of the shell; the top end of the first discharge pipe is fixedly connected to the bottom surface of the outer cover, and the first discharge pipe is communicated with the outer cover; the first drive assembly is used to drive the screen drum to rotate.

[0005] Preferably, a conical material receiving hopper is provided below the shell, the top opening of the material receiving hopper matches the bottom end of the shell, and the top end of the material receiving hopper is fixedly connected to the bottom end of the shell.

[0006] Preferably, a discharge hopper and a second discharge pipe are provided below the receiving hopper; the bottom opening of the receiving hopper is located in the discharge hopper, and the bottom opening of the discharge hopper is fixedly connected and communicated with the top of the first end of the second discharge pipe.

[0007] Preferably, the second discharge pipe is horizontally arranged, and a second drive assembly is arranged at the first end of the second discharge pipe, and the second drive assembly includes a second drive motor, a first screw and a first nut; the first screw is located in the second discharge pipe, and the axial direction of the first screw is the same as the extension direction of the second discharge pipe; the first nut is sleeved on the first screw and threadedly connected with the first screw, and the outer contour of the first nut matches the inner contour of the second discharge pipe; the second drive motor is located on one side of the first end of the second discharge pipe, and the output shaft of the second drive motor passes through the first end of the second discharge pipe and is fixedly connected to the end of the first screw.

[0008] Preferably, a redirecting roller is arranged between the first end of the feed pipe and the small-mouth end of the screen cylinder, and the redirecting roller includes an inner cylinder and an outer cylinder, the outer cylinder is sleeved on the inner cylinder and rotatably connected to the inner cylinder; the first end of the inner cylinder passes through the side wall of the shell and is fixedly connected to the side wall of the shell, the first end of the inner cylinder is communicated with and fixedly connected to the first end of the feed pipe; the end of the outer cylinder away from the feed pipe is fixedly connected to the small-mouth end of the screen cylinder, and the feed pipe is communicated with the screen cylinder through the inner cylinder.

[0009] Preferably, the first drive assembly includes a first drive motor and a transmission belt; the first drive motor is fixedly connected to the outer wall at the top of the shell; a through hole is opened on the outer wall of the shell, the transmission belt is passed through the through hole, and the transmission belt is sleeved between the outer cylinder and the output shaft of the first drive motor.

[0010] Preferably, a first rolling ring is fixedly connected to the outer wall of the small mouth end of the screen cylinder along its circumference, and a plurality of first support bearings are arranged around the first rolling ring. The inner rings of the plurality of first support bearings are fixedly connected to the inner wall of the shell, and the outer rings of the plurality of first support bearings are rollingly connected to the first rolling ring.

[0011] Preferably, a second rolling ring is fixedly connected to the outer wall of the large mouth end of the screen cylinder along its circumference, and a plurality of second support bearings are arranged around the second rolling ring. The inner rings of the plurality of second support bearings are fixedly connected to the inner wall of the shell, and the outer rings of the plurality of second support bearings are rollingly connected to the second rolling ring.

[0012] Preferably, the feed pipe is arranged horizontally, and a third drive assembly is arranged at the first end of the feed pipe, and the third drive assembly includes a third drive motor, a second screw and a second nut; the second screw is located in the feed pipe, and the axial direction of the second screw is the same as the extension direction of the feed pipe; the second nut is sleeved on the second screw and threadedly connected with the second screw, and the outer contour of the second nut matches the inner contour of the feed pipe; the third drive motor is located on one side of the second end of the feed pipe, and the output shaft of the third drive motor passes through the second end of the feed pipe and is fixedly connected to the end of the second screw.

[0013] Preferably, a guide rod is provided in the outer cover, one end of the guide rod is fixedly connected to the inner wall of the outer cover, and the other end of the guide rod is rollingly connected to the inner wall of the large-mouth end of the screen drum.

[0014] The utility model provides a rotary screening device for tobacco particles, which has the following beneficial effects:

[0015] (1) A rotatable conical screen drum is designed in the shell, and the material to be screened is transported into the screen drum by using a feed hopper and a feed pipe. Without adding additional force, an axial movement force is provided for the material entering the screen drum. At the same time, the rotation of the conical screen drum generates centrifugal force. Under the action of centrifugal force, tobacco particles pass through the screen holes, the receiving hopper, the discharge hopper and the second discharge pipe to enter the next process. Particles with lighter density or larger particle size are discharged from the large mouth of the screen drum through the outer cover and the first discharge pipe, thereby realizing the screening of tobacco particles and agglomerated impurities with similar density to tobacco, and the screening effect is good. In addition, the dust generated during the screening process is retained in the shell, which solves the problem of generating a large amount of dust during the screening process and is beneficial to the health of the workers.

[0016] (2) By designing the connection between the screen drum and the feed pipe to pass through a redirecting roller and using the first drive motor to drive the screen drum to rotate through a transmission belt, the operating noise can be effectively reduced; by designing the first roller ring and the second roller ring at both ends of the screen drum, and designing a plurality of first support bearings and second support bearings around the first roller ring and the second roller ring, on the one hand, it supports the screen drum and improves the stability of the screen drum operation; on the other hand, it is conducive to the rolling connection between the first support bearing and the first roller ring, the second support bearing and the second roller ring, thereby improving the smoothness of the screen drum rotation and reducing the operating noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0018] Figure 1 A schematic diagram of the structure according to an embodiment of the utility model is shown;

[0019] Figure 2 A cross-sectional view according to an embodiment of the present invention is shown.

[0020] Reference numerals:

[0021] 1. Shell; 2. Screen drum; 21. Second roller ring; 3. Feed pipe; 31. Feed hopper; 4. Outer cover; 41. First discharge pipe; 51. First drive motor; 52. Drive belt; 53. Through hole; 6. Collecting hopper; 71. Discharge hopper; 72. Second discharge pipe; 81. Second drive motor; 82. First screw; 91. First support bearing; 92. Second support bearing; 101. Third drive motor; 102. Second screw; 11. Guide rod. DETAILED DESCRIPTION

[0022] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0023] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0024] In order to at least partially solve the above problems and one or more of other potential problems, the embodiments of the present disclosure provide a rotary screening device for tobacco particles, including a shell 1, a screen drum 2, a feed pipe 3, a feed hopper 31, an outer cover 4, a first discharge pipe 41, and a first drive assembly; the shell 1 is a box structure with an opening at the bottom; the screen drum 2 is a frustum-shaped structure with openings at both ends; the screen drum 2 is horizontally arranged in the shell 1, and both ends of the screen drum 2 penetrate the opposite side walls of the shell 1 and are rotatably connected to the corresponding side walls. The feed pipe 3 is located outside the shell 1 and is located on the side of the small-mouth end of the screen drum 2. The first end of the feed pipe 3 is fixedly connected to the shell 1 and communicated with the small-mouth end of the screen drum 2. The bottom end opening of the feed hopper 31 is communicated with the second end of the feed pipe 3 and is fixedly connected. The outer cover 4 is located outside the shell 1 and is provided on the large-mouth end of the screen drum 2. The outer cover 4 is fixedly connected to the outer wall of the shell 1. The top end of the first discharge pipe 41 is fixedly connected to the bottom surface of the outer cover 4, and the first discharge pipe 41 is communicated with the outer cover 4. The first drive assembly is used to drive the screen drum 2 to rotate.

[0025] Specifically, Figure 1 and Figure 2As shown, the shell 1 is a box structure with an opening at the bottom; the screen drum 2 is in a frustum shape and is a structure with openings at both ends, and the screen holes of the screen drum 2 are preferably 20-50 meshes; the screen drum 2 is horizontally arranged in the shell 1, and both ends of the screen drum 2 pass through the opposite side walls of the shell 1 and are rotatably connected to the corresponding side walls; the feed pipe 3 is located outside the shell 1 and on the side of the small mouth end of the screen drum 2, and the first end of the feed pipe 3 is fixedly connected to the shell 1 and communicated with the small mouth end of the screen drum 2; preferably, a redirecting roller is arranged between the first end of the feed pipe 3 and the small mouth end of the screen drum 2, and the redirecting roller includes an inner cylinder and an outer cylinder, the outer cylinder is sleeved on the inner cylinder and is rotatably connected to the inner cylinder; the inner cylinder The first end passes through the side wall of the shell 1 and is fixedly connected to the side wall of the shell 1, the first end of the inner cylinder is communicated with and fixedly connected to the first end of the feed pipe 3; the end of the outer cylinder away from the feed pipe 3 is fixedly connected to the small mouth end of the screen drum 2, and the feed pipe 3 is communicated with the screen drum 2 through the inner cylinder; the first drive assembly is used to drive the screen drum 2 to rotate, specifically, the first drive assembly includes a first drive motor 51 and a transmission belt 52; the first drive motor 51 is fixedly connected to the outer wall at the top of the shell 1; a through hole 53 is opened on the outer wall of the shell 1, the transmission belt 52 is inserted into the through hole 53, and the transmission belt 52 is sleeved between the outer cylinder and the output shaft of the first drive motor 51.

[0026] In a preferred embodiment, a first rolling ring is fixedly connected to the outer wall of the small-mouth end of the screen drum 2 along its circumference, and a plurality of first support bearings 91 are arranged around the first rolling ring. In the present embodiment, three first support bearings 91 are arranged, which are evenly distributed around the first rolling ring. The inner rings of the plurality of first support bearings 91 are fixedly connected to the inner wall of the shell 1, and the outer rings of the plurality of first support bearings 91 are rollingly connected to the first rolling ring; a second rolling ring 21 is fixedly connected to the outer wall of the large-mouth end of the screen drum 2 along its circumference, and a plurality of second support bearings 92 are arranged around the second rolling ring 21. In the present embodiment, two second support bearings 92 are arranged, which are respectively arranged on both sides below the second rolling ring 21. The inner rings of the plurality of second support bearings 92 are fixedly connected to the inner wall of the shell 1, and the outer rings of the plurality of second support bearings 92 are rollingly connected to the second rolling ring 21.

[0027] The feed hopper 31 is vertically arranged, and the bottom opening of the feed hopper 31 is connected to and fixedly connected with the second end of the feed pipe 3; preferably, the feed pipe 3 is horizontally arranged, and the first end of the feed pipe 3 is provided with a third drive assembly, and the third drive assembly includes a third drive motor 101, a second screw 102 and a second nut; the second screw 102 is located in the feed pipe 3, and the axial direction of the second screw 102 is the same as the extension direction of the feed pipe 3; the second nut is sleeved on the second screw 102 and threadedly connected with the second screw 102, and the outer contour of the second nut matches the inner contour of the feed pipe 3; the third drive motor 101 is located on one side of the second end of the feed pipe 3, and the output shaft of the third drive motor 101 passes through the second end of the feed pipe 3 and is fixedly connected to the end of the second screw 102.

[0028] The outer cover 4 is located outside the shell 1 and is arranged on the large-mouth end of the screen drum 2. The outer cover 4 is fixedly connected to the outer wall of the shell 1; the top end of the first discharge pipe 41 is fixedly connected to the bottom surface of the outer cover 4, and the first discharge pipe 41 is communicated with the outer cover 4; preferably, a guide rod 11 is arranged in the outer cover 4, one end of the guide rod 11 is fixedly connected to the inner wall of the outer cover 4, and the other end of the guide rod 11 is rollingly connected to the inner wall of the large-mouth end of the screen drum 2.

[0029] In a preferred embodiment, a conical receiving hopper 6 is provided below the shell 1, the top opening of the receiving hopper 6 matches the bottom end of the shell 1, and the top of the receiving hopper 6 is fixedly connected to the bottom end of the shell 1; preferably, a discharge hopper 71 and a second discharge pipe 72 are provided below the receiving hopper 6; the discharge hopper 71 is vertically arranged, the bottom opening of the receiving hopper 6 is located in the discharge hopper 71, and the bottom opening of the discharge hopper 71 is fixedly connected and communicated with the top of the first end of the second discharge pipe 72; more preferably, the second discharge pipe 72 is horizontally arranged, and the first end of the second discharge pipe 72 is provided with a second drive group The second driving assembly includes a second driving motor 81, a first screw 82 and a first nut; the first screw 82 is located in the second discharge pipe 72, and the axial direction of the first screw 82 is the same as the extension direction of the second discharge pipe 72; the first nut is sleeved on the first screw 82 and is threadedly connected to the first screw 82, and the outer contour of the first nut matches the inner contour of the second discharge pipe 72; the second driving motor 81 is located on one side of the first end of the second discharge pipe 72, and the output shaft of the second driving motor 81 passes through the first end of the second discharge pipe 72 and is fixedly connected to the end of the first screw 82.

[0030] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A rotary screening device for tobacco particles, characterized in that: It comprises a housing (1), a screen drum (2), a feed pipe (3), a feed hopper (31), an outer cover (4), a first discharge pipe (41), and a first drive assembly; The housing (1) is a box structure with an opening at the bottom; The sieve drum (2) is in the shape of a cone and has an open structure at both ends. The sieve drum (2) is horizontally arranged in the shell (1), and both ends of the sieve drum (2) penetrate the opposite side walls of the shell (1) and are rotatably connected to the corresponding side walls. The feed pipe (3) is located outside the shell (1) and on one side of the small opening of the sieve drum (2); a first end of the feed pipe (3) is fixedly connected to the shell (1) and communicates with the small opening of the sieve drum (2); The bottom opening of the feed hopper (31) is communicated with and fixedly connected to the second end of the feed pipe (3); The outer cover (4) is located outside the shell (1) and is arranged on the large opening end of the sieve drum (2). The outer cover (4) is fixedly connected to the outer wall of the shell (1); The top end of the first discharge pipe (41) is fixedly connected to the bottom surface of the outer cover (4), and the first discharge pipe (41) is in communication with the outer cover (4); The first driving assembly is used to drive the screen drum (2) to rotate.

2. A rotary screening device for tobacco particles according to claim 1, characterized in that: A conical material receiving hopper (6) is arranged below the shell (1), the top opening of the material receiving hopper (6) matches the bottom end of the shell (1), and the top end of the material receiving hopper (6) is fixedly connected to the bottom end of the shell (1).

3. A rotary screening device for tobacco particles according to claim 2, characterized in that: A discharge hopper (71) and a second discharge pipe (72) are provided below the receiving hopper (6); the bottom opening of the receiving hopper (6) is located in the discharge hopper (71), and the bottom opening of the discharge hopper (71) is fixedly connected and communicated with the top of the first end of the second discharge pipe (72).

4. A rotary screening device for tobacco particles according to claim 3, characterized in that: The second discharge pipe (72) is arranged horizontally, and a second driving assembly is arranged at the first end of the second discharge pipe (72), and the second driving assembly comprises a second driving motor (81), a first screw (82) and a first nut; the first screw (82) is located in the second discharge pipe (72), and the axial direction of the first screw (82) is the same as the extension direction of the second discharge pipe (72); the first nut is sleeved on the first screw (82) and is threadedly connected to the first screw (82), and the outer contour of the first nut matches the inner contour of the second discharge pipe (72); the second driving motor (81) is located on one side of the first end of the second discharge pipe (72), and the output shaft of the second driving motor (81) passes through the first end of the second discharge pipe (72) and is fixedly connected to the end of the first screw (82).

5. A rotary screening device for tobacco particles according to claim 1, characterized in that: A redirecting roller is arranged between the first end of the feed pipe (3) and the small-mouth end of the screen drum (2), and the redirecting roller comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved on the inner cylinder and is rotatably connected to the inner cylinder; the first end of the inner cylinder passes through the side wall of the shell (1) and is fixedly connected to the side wall of the shell (1), and the first end of the inner cylinder is connected to and fixedly connected to the first end of the feed pipe (3); the end of the outer cylinder away from the feed pipe (3) is fixedly connected to the small-mouth end of the screen drum (2), and the feed pipe (3) is connected to the screen drum (2) through the inner cylinder.

6. A rotary screening device for tobacco particles according to claim 5, characterized in that: The first driving assembly comprises a first driving motor (51) and a transmission belt (52); the first driving motor (51) is fixedly connected to the outer wall at the top of the shell (1); a through hole (53) is opened on the outer wall of the shell (1), the transmission belt (52) is inserted into the through hole (53), and the transmission belt (52) is sleeved between the outer cylinder and the output shaft of the first driving motor (51).

7. A rotary screening device for tobacco particles according to claim 1, characterized in that: A first rolling ring is fixedly connected to the outer wall of the small-mouth end of the screen drum (2) along its circumference, and a plurality of first support bearings (91) are arranged around the first rolling ring. The inner rings of the plurality of first support bearings (91) are fixedly connected to the inner wall of the housing (1), and the outer rings of the plurality of first support bearings (91) are rollingly connected to the first rolling ring.

8. A rotary screening device for tobacco particles according to claim 1, characterized in that: A second rolling ring (21) is fixedly connected to the outer wall of the large-mouth end of the screen drum (2) along its circumference, and a plurality of second support bearings (92) are arranged around the second rolling ring (21). The inner rings of the plurality of second support bearings (92) are fixedly connected to the inner wall of the housing (1), and the outer rings of the plurality of second support bearings (92) are rollingly connected to the second rolling ring (21).

9. A rotary screening device for tobacco particles according to claim 1, characterized in that: The feed pipe (3) is arranged horizontally, and a third drive assembly is arranged at the first end of the feed pipe (3), and the third drive assembly comprises a third drive motor (101), a second screw rod (102) and a second nut; the second screw rod (102) is located in the feed pipe (3), and the axial direction of the second screw rod (102) is the same as the extension direction of the feed pipe (3); the second nut is sleeved on the second screw rod (102) and is threadedly connected to the second screw rod (102), and the outer contour of the second nut matches the inner contour of the feed pipe (3); the third drive motor (101) is located at one side of the second end of the feed pipe (3), and the output shaft of the third drive motor (101) passes through the second end of the feed pipe (3) and is fixedly connected to the end of the second screw rod (102).

10. A rotary screening device for tobacco particles according to claim 1, characterized in that: A guide rod (11) is arranged inside the outer cover (4), one end of the guide rod (11) is fixedly connected to the inner wall of the outer cover (4), and the other end of the guide rod (11) is rollingly connected to the inner wall of the large-mouth end of the screen drum (2).

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