Single-groove multi-channel vibrating screen classifier

Abstract

The utility model discloses a single-groove multichannel vibrating screen classifier which comprises a machine frame and a vibrating screen box body, the vibrating screen box body is connected with the machine frame through a plurality of first spring pieces, a power device and an eccentric transmission device are arranged on the machine frame, and the power device is connected with the eccentric transmission device. One end of the vibrating screen box body is connected with the eccentric transmission device through a first connecting spring piece, a screen mesh assembly and a turning plate mechanism are arranged in the vibrating screen box body, and a turning plate driving device is arranged on the outer wall of the vibrating screen box body. Free switching between three-stage screening and four-stage screening can be achieved according to actual requirements, different screening requirements are met, and the screening device has the advantages of being efficient and convenient to use.

Description

Technical Field

[0001] The utility model relates to a screening machine, in particular to a single-trough multi-channel vibration screening machine. Background Art

[0002] During the threshing and re-roasting process, the threshing machine and air separator separate the tobacco leaves and stems. After this process, the tobacco leaves are broken down into large, medium, and small flakes of varying sizes, as well as tobacco dust. Depending on production needs, the fragments are screened. Large flakes are fed back into the main production line through an air duct; medium flakes are used for high-end module production; small flakes are used for thin sheet production; and tobacco dust is packaged separately.

[0003] Currently, vibrating screens only offer three-stage screening, lacking the high-end modular tobacco flake screening function, and are unable to meet the process requirements of four-stage screening. However, depending on the actual production batch, both three-stage and four-stage screening are required, requiring the equipment to be able to freely switch between the two modes. Therefore, a vibrating screen with multiple production modes is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a single-trough multi-channel vibrating screening machine to solve the technical problems in the existing technology. It can freely switch between three-stage screening and four-stage screening according to actual needs, meet different screening needs, and has the advantages of high efficiency and convenience.

[0005] The utility model provides a single-trough multi-channel vibrating screening machine, comprising a frame and a vibrating screen box, the vibrating screen box being connected to the frame via a plurality of first spring sheets, a power device and an eccentric transmission device being provided on the frame, the power device being connected to the eccentric transmission device, one end of the vibrating screen box being connected to the eccentric transmission device via a first connecting spring sheet, a screen assembly and a flap mechanism being provided in the vibrating screen box, and a flap driving device being provided on the outer wall of the vibrating screen box.

[0006] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, the screen assembly includes a primary screen, a secondary screen and a tertiary screen, the length of the primary screen is less than the length of the vibrating screen box, the length of the secondary screen is less than the length of the primary screen, the length of the tertiary screen is less than the length of the secondary screen, and one end of the primary screen, the secondary screen and the tertiary screen are fixedly connected to the side wall of the feed end of the vibrating screen box.

[0007] In the aforementioned single-tank multi-channel vibrating screening machine, preferably, the mesh size of the first-stage screen is 6.35mm×6.35mm, the mesh size of the second-stage screen is 4.5mm×4.5mm, and the mesh size of the third-stage screen is 1.5mm×1.5mm.

[0008] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, a first discharge pipe, a second discharge pipe, a third discharge pipe and a fourth discharge pipe are provided at the bottom of the vibrating screening box, the feed end of the first discharge pipe is aligned with the discharge end of the first-level screen, the feed end of the second discharge pipe is aligned with the discharge end of the second-level screen, the feed end of the third discharge pipe is aligned with the discharge end of the third-level screen, and the feed end of the fourth discharge pipe is located in the middle of the bottom plate of the vibrating screening box.

[0009] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, a plurality of spring sheet lower fixing plates are arranged at equal intervals in the frame along its length direction, and a plurality of spring sheet upper fixing plates are arranged at equal intervals in the bottom of the vibrating screening box along its length direction. The number of the spring sheet lower fixing plates is equal to the number of the spring sheet upper fixing plates, and the adjacent spring sheet lower fixing plates and the spring sheet upper fixing plates are connected by two first spring sheets, wherein a first connecting seat is formed in the middle of the spring sheet upper fixing plate closest to the eccentric transmission device.

[0010] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, the eccentric transmission device includes a rotating shaft, a seat bearing, a driven pulley, a first eccentric bearing and a second eccentric bearing, the rotating shaft is rotatably mounted on the frame through the two seat bearings, the first eccentric bearing and the second eccentric bearing are mounted on the rotating shaft, the driven pulley is fixed at one end of the rotating shaft and is connected to the power device through a belt, a first connecting column is formed on the outer wall of the first eccentric bearing, a thread is formed on the end of the first connecting column, a second connecting seat is threadedly connected to the first connecting column, the second connecting seat is fixedly connected to one end of the first connecting spring sheet, and the other end of the first connecting spring sheet is fixedly connected to the first connecting seat.

[0011] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, a counterweight base is provided between the frame and the vibrating screening box, and a connecting plate is provided on the counterweight base. The number of the connecting plates is the same as the number of the fixed plates under the spring sheets, and each of the connecting plates is connected to the fixed plate under the spring sheets through two second spring sheets. A third connecting seat is formed on one end of the counterweight base close to the eccentric transmission device, a second connecting column is formed on the outer wall of the second eccentric bearing, a thread is formed on the end of the second connecting column, a fourth connecting seat is threadedly connected to the second connecting column, and the fourth connecting seat is connected to the third connecting seat through a second connecting spring sheet.

[0012] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, the power device is a servo motor, and a driving pulley is fixedly mounted on the output shaft of the servo motor, and the driving pulley is connected to the driven pulley through the belt.

[0013] In the aforementioned single-trough multi-channel vibrating screening machine, preferably, the flip mechanism includes a diverter baffle and a baffle mounting shaft, the flip driving device is a rotary cylinder, the diverter baffle is rotatably connected to the lower ends of the two side walls of the vibrating screen box through the baffle mounting shaft, the rotary cylinder is fixed on the outer wall of the vibrating screen box, and the output shaft of the rotary cylinder is fixedly connected to one end of the baffle mounting shaft.

[0014] Compared to the prior art, the present invention includes a frame and a vibrating screen housing, the vibrating screen housing being connected to the frame via a plurality of first spring plates. The frame is provided with a power unit and an eccentric transmission device, the power unit being connected to the eccentric transmission device. One end of the vibrating screen housing is connected to the eccentric transmission device via a first connecting spring plate. The vibrating screen housing is provided with a screen assembly and a flap mechanism, and the outer wall of the vibrating screen housing is provided with a flap drive device. The present invention, through the provision of the flap mechanism, can switch the number of screens in operation, thereby achieving conversion between three-stage screening and four-stage screening, which can be adjusted according to demand. This not only meets diverse work needs, but also has the advantage of simple adjustment, greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing of the present utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 This is a schematic diagram of the local structure;

[0018] Figure 4 It is a structural diagram of the power unit and the eccentric transmission device;

[0019] Figure 5 It is a structural diagram of the vibrating screen box;

[0020] Figure 6 It is a cross-sectional view of the present utility model.

[0021] Explanation of the accompanying drawings: frame 1, vibrating screen box 2, first spring sheet 3, first connecting spring sheet 4, primary screen 5, secondary screen 6, tertiary screen 7, first discharge pipe 8, second discharge pipe 9, third discharge pipe 10, fourth discharge pipe 11, lower fixing plate 12 of spring sheet, upper fixing plate 13 of spring sheet, first connecting seat 14, rotating shaft 15, seat bearing 16, driven pulley 17, first eccentric bearing 18, second eccentric bearing 19, belt 20, first connecting column 21, second connecting seat 22, counterweight base 23, connecting plate 24, second spring sheet 25, third connecting seat 26, second connecting column 27, fourth connecting seat 28, second connecting spring sheet 29, servo motor 30, driving pulley 31, diverter baffle 32, baffle mounting shaft 33, rotating cylinder 34. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] The embodiment of the present utility model: Figures 1-6 As shown, a single-trough multi-channel vibrating screening machine includes a frame 1 and a vibrating screen box 2. The upper part of the frame 1 is a rectangular frame structure, and the lower part is a supporting leg structure. The vibrating screen box 2 is connected to the frame 1 through a number of first spring sheets 3. A power device and an eccentric transmission device are provided on the frame 1. The power device is connected to the eccentric transmission device. One end of the vibrating screen box 2 is connected to the eccentric transmission device through a first connecting spring sheet 4. A screen assembly and a flip mechanism are provided in the vibrating screen box 2, and a flip drive device is provided on the outer wall of the vibrating screen box 2.

[0024] The vibrating screen box 2 is a rectangular box. The screen assembly inside the vibrating screen box 2 can perform multi-stage screening of tobacco leaf fragments according to needs. The power device is used to provide driving force for the eccentric transmission device, and the eccentric transmission device is used to drive the vibrating screen box 2 to vibrate, thereby realizing the screening of tobacco leaf fragments.

[0025] In a specific embodiment, the screen assembly includes a primary screen 5, a secondary screen 6 and a tertiary screen 7. The length of the primary screen 5 is less than the length of the vibrating screen box 2, the length of the secondary screen 6 is less than the length of the primary screen 5, and the length of the tertiary screen 7 is less than the length of the secondary screen 6. One end of the primary screen 5, the secondary screen 6 and the tertiary screen 7 are fixedly connected to the side wall of the feed end of the vibrating screen box 2.

[0026] In this embodiment, the first-level screen 5 is located at the top layer, the second-level screen 6 is located in the middle layer, and the third-level screen 7 is located at the bottom layer. The three screens are designed to have different lengths so that tobacco leaf fragments of different sizes can fall on different positions of the bottom plate of the vibrating screen box 2 for easy collection.

[0027] Furthermore, the mesh size of the first-stage screen 5 is 6.35mm×6.35mm, the mesh size of the second-stage screen 6 is 4.5mm×4.5mm, and the mesh size of the third-stage screen 7 is 1.5mm×1.5mm. A first discharge pipe 8, a second discharge pipe 9, a third discharge pipe 10, and a fourth discharge pipe 11 are provided at the bottom of the vibrating screen box 2. The feed end of the first discharge pipe 8 is aligned with the discharge end of the first-stage screen 5, the feed end of the second discharge pipe 9 is aligned with the discharge end of the second-stage screen 6, the feed end of the third discharge pipe 10 is aligned with the discharge end of the third-stage screen 7, and the feed end of the fourth discharge pipe 11 is located in the middle of the bottom plate of the vibrating screen box 2. The first discharge pipe 8, the second discharge pipe 9, and the third discharge pipe 10 are all arranged along the width direction of the vibrating screen box 2, and their lengths are all greater than the width of the vibrating screen box 2. The ends of the first discharge pipe 8, the second discharge pipe 9, and the third discharge pipe 10 that extend beyond the vibrating screen box 2 are designed with downward elbow structures to facilitate the installation of the receiving bag. The fourth discharge pipe 11 is used to discharge tobacco dust, which can be directly transported away by a conveyor belt. Therefore, the fourth discharge pipe 11 is a vertically arranged straight pipe structure.

[0028] Tobacco leaf fragments with a size of 6.35mm×6.35mm or greater move along the primary screen 5 and eventually fall into the first discharge pipe 8. Tobacco leaf fragments with a size between 6.35mm×6.35mm and 4.5mm×4.5mm move along the secondary screen 6 and eventually fall into the second discharge pipe 9. Tobacco leaf fragments with a size between 4.5mm×4.5mm and 1.5mm×1.5mm move along the tertiary screen 7 and eventually fall into the third discharge pipe 10. Tobacco leaf fragments with a size of 1.5mm×1.5mm or less move along the bottom plate of the vibrating screen box 2 and enter the fourth discharge pipe 11. Tobacco leaves of different sizes are collected separately through different discharge pipes.

[0029] Furthermore, a plurality of spring sheet lower fixing plates 12 are arranged at equal intervals along the length direction of the frame 1, and a plurality of spring sheet upper fixing plates 13 are arranged at equal intervals along the length direction of the bottom of the vibrating screen box 2. The number of spring sheet lower fixing plates 12 is equal to the number of spring sheet upper fixing plates 13. Adjacent spring sheet lower fixing plates 12 and spring sheet upper fixing plates 13 are connected by two first spring sheets 3, and a first connecting seat 14 is formed in the middle of the spring sheet upper fixing plate 13 closest to the eccentric transmission device.

[0030] In this embodiment, the number of the spring sheet lower fixing plates 12 and the spring sheet upper fixing plates 13 is preferably set to three, and the three spring sheet upper fixing plates 13 are all set at a 45° angle to the horizontal plane. The three spring sheet lower fixing plates 12 are also all set at a 45° angle to the horizontal plane. The spring sheet lower fixing plates 12 and the spring sheet upper fixing plates 13 are arranged in parallel. In the natural state, the three spring sheet upper fixing plates 13 are opposite to the three spring sheet lower fixing plates 12 one by one. The opposite set of spring sheet lower fixing plates 12 and spring sheet upper fixing plates 13 are connected by two first spring sheets 3, and the two first spring sheets 3 are arranged at both ends of the spring sheet lower fixing plates 12 and the spring sheet upper fixing plates 13. With this structural setting, the vibration effect of the vibrating screen box 2 is better and the service life of the first spring sheets 3 is longer.

[0031] Furthermore, the eccentric transmission device includes a rotating shaft 15, a seat bearing 16, a driven pulley 17, a first eccentric bearing 18 and a second eccentric bearing 19. The rotating shaft 15 is rotatably mounted on the frame 1 through two seat bearings 16. The first eccentric bearing 18 and the second eccentric bearing 19 are mounted on the rotating shaft 15. The driven pulley 17 is fixed at one end of the rotating shaft 15. The driven pulley 17 is connected to the power device through a belt 20. A first connecting column 21 is formed on the outer wall of the first eccentric bearing 18. A thread is formed on the end of the first connecting column 21. A second connecting seat 22 is threadedly connected to the first connecting column 21. The second connecting seat 22 is fixedly connected to one end of the first connecting spring sheet 4, and the other end of the first connecting spring sheet 4 is fixedly connected to the first connecting seat 14.

[0032] Through the threaded connection between the second connecting seat 22 and the first connecting column 21 , the position of the second connecting seat 22 can be adjusted, thereby overcoming errors during production and making installation more convenient.

[0033] Furthermore, a counterweight base 23 is provided between the frame 1 and the vibrating screen box 2, and a connecting plate 24 is provided on the counterweight base 23. The number of connecting plates 24 is the same as the number of fixed plates 12 under the spring sheet. Each connecting plate 24 is connected to the fixed plate 12 under the spring sheet through two second spring sheets 25. A third connecting seat 26 is formed at one end of the counterweight base 23 close to the eccentric transmission device, and a second connecting column 27 is formed on the outer wall of the second eccentric bearing 19. The end of the second connecting column 27 is formed with a thread, and a fourth connecting seat 28 is threadedly connected to the second connecting column 27. The fourth connecting seat 28 is connected to the third connecting seat 26 through the second connecting spring sheet 29.

[0034] In this embodiment, there are three connecting plates 24, which are also arranged at a 45° angle to the horizontal plane. The connecting plates 24 are arranged parallel to the lower spring plate 12. The second spring plate 25 is connected to the middle of the lower spring plate 12 and the connecting plates 24. The provision of the counterweight base 23 can increase the vibration force and improve the screening effect. It can also reduce the resonance phenomenon of the vibrating screen during operation and ensure operational stability.

[0035] Furthermore, the power device is a servo motor 30, and a driving pulley 31 is fixedly mounted on the output shaft of the servo motor 30. The driving pulley 31 is connected to the driven pulley 17 via a belt 20. The flap mechanism includes a diverter baffle 32 and a baffle mounting shaft 33. The flap driving device is a rotary cylinder 34. The diverter baffle 32 is rotatably connected to the lower ends of the two side walls of the vibrating screen box 2 via the baffle mounting shaft 33. The rotary cylinder 34 is fixed to the outer wall of the vibrating screen box 2, and the output shaft of the rotary cylinder 34 is fixedly connected to one end of the baffle mounting shaft 33.

[0036] By driving the rotating cylinder 34, the diverter baffle 32 can be in a horizontal state or a vertical state. When the diverter baffle 32 is in a horizontal state, the second discharge pipe 9 is blocked, which is approximately equal to three-level screening. When the diverter baffle 32 is in a vertical state, the second discharge pipe 9 works normally, realizing four-level screening.

[0037] The working principle of the present invention is as follows: in the conventional production mode, the rotary cylinder 34 is started, and the rotary cylinder 34 rotates 90° clockwise and is fixed, driving the diverter baffle 32 to move synchronously, and the diverter baffle 32 covers the second discharge pipe 9.

[0038] The servo motor 30 is working, driving the driven pulley 17 to rotate through the active pulley 31 and the belt 20, and the driven pulley 17 drives the rotating shaft 15 to rotate. The rotating shaft 15 drives the first eccentric bearing 18 and the second eccentric bearing 19 to work. The first eccentric bearing 18 and the second eccentric bearing 19 perform simple harmonic motion back and forth. The first eccentric bearing 18 transmits the motion to the vibrating screen box 2 through the first connecting spring piece 4. One end of the first spring piece 3 moves together with the vibrating screen box 2, while the other end of the first spring piece 3 is connected to the fixed frame 1. Therefore, the first spring piece 3 produces a large elastic deformation, and the elastic deformation transmits force to the vibrating screen box 2, generating vibration. The counterweight base 23 is connected to the second eccentric bearing 19 through the second connecting spring piece 29. The principle is the same as the vibration of the vibrating screen box 2. The counterweight base 23 can increase the vibration force and improve the screening effect. At the same time, it can also reduce the resonance phenomenon of the vibrating screen during operation and ensure operational stability.

[0039] When the equipment starts working, tobacco leaves fall from the feed end of the vibrating screen box 2, that is, above the end near the servo motor 30. Under the vibration, tobacco leaves with a size of less than 6.35mm×6.35mm pass through the mesh of the first-level screen 5 and fall. The remaining tobacco leaves move forward due to vibration and fall into the first discharge pipe 8, through which they are mixed back into the main production line. The tobacco leaves that fall on the secondary screen 6 are screened again, and tobacco leaves with a size of less than 4.5mm×4.5mm pass through the mesh of the secondary screen 6 and fall onto the tertiary screen 7. The remaining tobacco leaves move forward due to vibration. Since the feed port of the second discharge pipe 9 is covered, the tobacco leaves follow the diversion baffle 32 into the first discharge pipe 8 and are mixed back into the main production line through this channel. The tobacco leaves on the third-stage screen 7 continue to be screened. Tobacco leaves with a size smaller than 1.5 mm x 1.5 mm pass through the screen holes and fall onto the bottom plate of the vibrating screen box 2. Most of the tobacco leaves that pass through the third-stage screen 7 are tobacco dust. The tobacco leaves on the third-stage screen 7 are vibrated and move forward and fall into the third discharge pipe 10 for sheet production. The tobacco dust enters the fourth discharge pipe 11 under vibration and is collected and centrally processed. The equipment has now completed the third-stage screening.

[0040] In the high-end material production mode, the rotary cylinder 34 rotates 90° counterclockwise and then secures, driving the diverter baffle 32 to rotate synchronously, with the diverter baffle 32 in a vertical position. Tobacco leaves smaller than 6.35 mm x 6.35 mm but larger than or equal to 4.5 mm x 4.5 mm pass through the secondary screen 6 and fall into the second discharge pipe 9, where they are collected for high-end module material production. The remaining leaves are screened as described above, completing the fourth stage of screening.

[0041] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A single-tank multi-channel vibrating screening machine, comprising a frame (1) and a vibrating screening box (2), characterized in that: The vibrating screen box (2) is connected to the frame (1) via a plurality of first spring sheets (3); a power device and an eccentric transmission device are provided on the frame (1); the power device is connected to the eccentric transmission device; one end of the vibrating screen box (2) is connected to the eccentric transmission device via a first connecting spring sheet (4); a screen assembly and a flap mechanism are provided in the vibrating screen box (2); and a flap driving device is provided on the outer wall of the vibrating screen box (2).

2. The single-tank multi-channel vibrating screening machine according to claim 1, characterized in that: The screen assembly comprises a primary screen (5), a secondary screen (6) and a tertiary screen (7); the length of the primary screen (5) is shorter than the length of the vibrating screen box (2); the length of the secondary screen (6) is shorter than the length of the primary screen (5); the length of the tertiary screen (7) is shorter than the length of the secondary screen (6); and one end of each of the primary screen (5), the secondary screen (6) and the tertiary screen (7) is fixedly connected to the side wall of the feed end of the vibrating screen box (2).

3. The single-tank multi-channel vibrating screening machine according to claim 2, characterized in that: The mesh size of the primary screen (5) is 6.35 mm×6.35 mm, the mesh size of the secondary screen (6) is 4.5 mm×4.5 mm, and the mesh size of the tertiary screen (7) is 1.5 mm×1.5 mm.

4. The single-tank multi-channel vibrating screening machine according to claim 3 is characterized in that: The bottom of the vibrating screen box (2) is provided with a first discharge pipe (8), a second discharge pipe (9), a third discharge pipe (10) and a fourth discharge pipe (11); the feed end of the first discharge pipe (8) is aligned with the discharge end of the primary screen (5); the feed end of the second discharge pipe (9) is aligned with the discharge end of the secondary screen (6); the feed end of the third discharge pipe (10) is aligned with the discharge end of the tertiary screen (7); and the feed end of the fourth discharge pipe (11) is located in the middle of the bottom plate of the vibrating screen box (2).

5. The single tank multi-channel vibrating screening machine according to claim 1, characterized in that: A plurality of spring sheet lower fixing plates (12) are arranged at equal intervals in the frame (1) along its length direction, and a plurality of spring sheet upper fixing plates (13) are arranged at equal intervals in the bottom of the vibration screen box (2) along its length direction, the number of the spring sheet lower fixing plates (12) is equal to the number of the spring sheet upper fixing plates (13), and adjacent spring sheet lower fixing plates (12) and spring sheet upper fixing plates (13) are connected via two first spring sheets (3), wherein a first connecting seat (14) is formed in the middle of the spring sheet upper fixing plate (13) closest to the eccentric transmission device.

6. The single tank multi-channel vibrating screening machine according to claim 5, characterized in that: The eccentric transmission device comprises a rotating shaft (15), a seat bearing (16), a driven pulley (17), a first eccentric bearing (18) and a second eccentric bearing (19); the rotating shaft (15) is rotatably mounted on the frame (1) through the two seat bearings (16); the first eccentric bearing (18) and the second eccentric bearing (19) are mounted on the rotating shaft (15); the driven pulley (17) is fixedly arranged at one end of the rotating shaft (15) and connected to the power device through a belt (20); a first connecting column (21) is formed on the outer wall of the first eccentric bearing (18); a thread is formed at the end of the first connecting column (21); a second connecting seat (22) is threadedly connected to the first connecting column (21); the second connecting seat (22) is fixedly connected to one end of the first connecting spring sheet (4); and the other end of the first connecting spring sheet (4) is fixedly connected to the first connecting seat (14).

7. The single tank multi-channel vibrating screening machine according to claim 6, characterized in that: A counterweight base (23) is arranged between the frame (1) and the vibrating screen box (2), and a connecting plate (24) is arranged on the counterweight base (23). The number of the connecting plates (24) is the same as the number of the fixing plates (12) under the spring sheets, and each of the connecting plates (24) is connected to the fixing plates (12) under the spring sheets via two second spring sheets (25). A third connecting seat (26) is formed at one end of the counterweight base (23) close to the eccentric transmission device, and a second connecting column (27) is formed on the outer wall of the second eccentric bearing (19), and a thread is formed at the end of the second connecting column (27). A fourth connecting seat (28) is threadedly connected to the second connecting column (27), and the fourth connecting seat (28) is connected to the third connecting seat (26) via a second connecting spring sheet (29).

8. The single tank multi-channel vibrating screening machine according to claim 7, characterized in that: The power device is a servo motor (30), and a driving pulley (31) is fixedly mounted on the output shaft of the servo motor (30), and the driving pulley (31) is connected to the driven pulley (17) through the belt (20).

9. The single tank multi-channel vibrating screening machine according to claim 1, characterized in that: The flap mechanism comprises a diverter baffle (32) and a baffle mounting shaft (33); the flap driving device is a rotary cylinder (34); the diverter baffle (32) is rotatably connected to the lower ends of the two side walls of the vibrating screen box (2) via the baffle mounting shaft (33); the rotary cylinder (34) is fixed to the outer wall of the vibrating screen box (2); and the output shaft of the rotary cylinder (34) is fixedly connected to one end of the baffle mounting shaft (33).

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