Novel belt type vibration screening machine

Abstract

The invention relates to the technical field of vibration screening, in particular to a novel belt type vibration screening machine which comprises a rack, an annular conveying mechanism arranged above the rack, a plurality of screening units connected end to end and driven by the annular conveying mechanism to move, and a winnowing assembly used for winnowing rice straw. According to the novel belt type vibration screening machine, through the arrangement of the double-layer staggered rhombic screen holes, rice falls onto the lower-layer fixed screen mesh from the upper-layer rhombic screen holes through vibration, then falls down from the lower-layer rhombic screen holes and is output from the output assembly, and rice straw with the short size is clamped in the upper-layer rhombic screen holes; the vertical rice straw can be prevented from directly falling down, rice can pass through by controlling the distance between the upper-layer movable screen and the lower-layer fixed screen, the rice straw is blocked, and the position of the upper-layer movable screen can be rapidly adjusted by rotating the height adjusting bolt.

Description

Technical Field

[0001] The invention relates to the technical field of vibration screening, in particular to a novel belt-type vibration screening machine. Background Art

[0002] When rice is harvested, the rice stalks need to be removed to obtain clean rice without impurities. Currently, most of the cleaning methods use vibration screening combined with wind separation. However, for short rice stalks, they are easy to fall directly from the pores of the screen and cannot be completely separated. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a novel belt-type vibrating screening machine to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a novel belt-type vibrating screening machine, comprising a frame, an annular conveying mechanism arranged above the frame, a plurality of screening units connected end to end and driven to move by the annular conveying mechanism, an air selection component for air selection of rice and rice stalks, a vibration component for vibrating the screening unit, and an output component for outputting rice, the frame is covered with a shell, and a feed port located above the screening unit is opened on the top of the shell;

[0005] The screening unit comprises a frame, a lower fixed screen is fixedly connected to the bottom of the inner cavity of the frame, an upper movable screen is slidably connected to the inner cavity of the frame, a height adjustment bolt is threadedly connected to the bottom of the lower fixed screen, the top of the height adjustment bolt passes through the lower fixed screen and abuts against the bottom of the upper movable screen, a stepped groove for limiting the upper movable screen is provided on the top of the frame, a wind groove located on the side of the air selection component is provided on the side of the frame, diamond-shaped screen holes are provided in the inner cavities of the upper movable screen and the lower fixed screen, and the diamond-shaped screen holes of the upper movable screen and the lower fixed screen are staggered up and down, and the spacing between the upper movable screen and the lower fixed screen is the length of rice. The rice grains with rice stalks are accumulated on the upper movable screen through the setting of double-layer staggered diamond sieve holes. The rice grains fall from the upper diamond sieve holes to the lower fixed screen through the vibration, and then fall from the lower diamond sieve holes to be output from the output assembly, while the shorter rice stalks are stuck in the upper diamond sieve holes. The staggered setting can prevent the upright rice stalks from falling directly. The distance between the upper movable screen and the lower fixed screen is controlled so that the rice grains can pass through while the rice stalks are blocked. Then the wind is discharged through the air trough through the air selection mechanism to separate the rice stalks and the rice grains, and the separation effect is good. The position of the upper movable screen can be quickly adjusted by turning the height adjustment bolt.

[0006] As a further solution of the present invention: the two frames are fixedly connected by an elastic sealing belt, and the elastic sealing belt prevents rice from leaking out of the gap.

[0007] As a further solution of the present invention: the annular conveying mechanism includes a sprocket driven by a motor to rotate in the inner cavity of the shell and a chain driven by the sprocket, the surface of the chain is fixedly connected with a plurality of transmission parts arranged in an annular array, one side of the transmission part is fixedly connected with an elastic plate, one side of the elastic plate is fixedly connected with a connecting plate located on the side of the frame, and the two connecting plates are driven to move in an annular manner through the transmission chains on both sides. The two connecting plates are respectively arranged on both sides of the frame, which can drive the frame to move, and through the arrangement of the elastic plate, the influence of the frame vibration on the transmission parts is reduced to filter vibration.

[0008] As a further solution of the present invention: the air selection component includes a screening air duct connected to the fan and respectively arranged on the surface of the shell and a cleaning air duct arranged on the side of the right frame. The screening air duct is used to discharge air to the frame to separate rice grains from rice straws. The cleaning air duct is used to discharge air to the screened frame on the right side to blow out the residual rice straw inside for cleaning, thereby achieving a better separation effect.

[0009] As a further solution of the present invention: the vibration component includes a cam rotatably arranged in the inner cavity of the shell, the rotation trajectory of the cam coincides with the side of the frame, the cam is continuously rotated by the motor, contacts with the top of the frame, and drives the frame to vibrate for screening. Several cams can vibrate multiple frames, and do not need to be transmitted along with the frame, which is more stable and has a simpler structure.

[0010] As a further solution of the present invention: the output component includes a receiving hopper fixed in the inner cavity of the shell, the receiving hopper is located below the upper multiple interconnected frames, the bottom of the receiving hopper is connected to an output channel, the output channel extends and passes through the outside of the shell, the screened rice leaks from the frame into the receiving hopper, and then is concentrated in the output channel and transported to the outside.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention, through the setting of double-layer staggered diamond sieve holes, rice first falls from the upper diamond sieve holes to the lower fixed sieve after vibration, and then falls from the lower diamond sieve holes to be output from the output assembly, while the shorter rice stalks are clamped in the upper diamond sieve holes. The staggered setting can prevent the erected rice stalks from falling directly, and the spacing between the upper movable sieve and the lower fixed sieve is controlled so that the rice can pass through while the rice stalks are blocked, and then the wind is discharged through the air trough by the wind selection mechanism to separate the rice stalks and the rice, and the separation effect is good, and the position of the upper movable sieve can be quickly adjusted by turning the height adjustment bolt.

[0013] 2. In the present invention, the cam is driven by the motor to continuously rotate, contact with the top of the frame, and drive the frame to vibrate for screening. Several cams can vibrate multiple frames, and do not need to be transmitted along with the frame, which is more stable and has a simpler structure.

[0014] 3. The present invention drives the two connecting plates to move in a circular manner by setting transmission chains on both sides. The two connecting plates are respectively set on both sides of the frame to drive the frame to move. The elastic plates are set to reduce the influence of the frame vibration on the transmission parts and perform vibration filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural cross-sectional view of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the present invention;

[0017] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0018] Figure 4 It is a top view of the upper movable screen and the lower fixed screen of the present invention.

[0019] In the figure: 1. frame; 2. sprocket; 3. chain; 4. transmission part; 5. elastic plate; 6. connecting plate; 7. frame; 8. cam; 9. receiving hopper; 10. receiving hopper; 11. cleaning air duct; 12. stepped groove; 13. upper movable screen; 14. lower fixed screen; 15. height adjustment bolt; 16. air passage groove; 17. elastic sealing belt; 18. upper diamond sieve hole; 19. shell; 20. screening air duct. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1-4 The present invention provides a technical solution: a novel belt-type vibrating screening machine, comprising a frame 1, an annular conveying mechanism arranged above the frame 1, a plurality of screening units connected end to end and driven to move by the annular conveying mechanism, an air selection component for air selection of rice and rice straw, a vibration component for vibrating the screening unit, and an output component for outputting rice, a shell 19 is sleeved on the surface of the frame 1, and a feed port located above the screening unit is opened on the top of the shell 19;

[0022] The screening unit comprises a frame 7, a lower fixed screen 14 is fixedly connected to the bottom of the inner cavity of the frame 7, an upper movable screen 13 is slidably connected to the inner cavity of the frame 7, a height adjustment bolt 15 is threadedly connected to the bottom of the lower fixed screen 14, the top of the height adjustment bolt 15 passes through the lower fixed screen 14 and abuts against the bottom of the upper movable screen 13, a stepped groove 12 for limiting the upper movable screen 13 is provided on the top of the frame 7, a wind groove 16 located on the side of the wind selection component is provided on the side of the frame 7, diamond-shaped sieve holes 18 are provided in the inner cavities of the upper movable screen 13 and the lower fixed screen 14, and the diamond-shaped sieve holes 18 of the upper movable screen 13 and the lower fixed screen 14 are staggered up and down, and the spacing between the upper movable screen 13 and the lower fixed screen 14 is rice. The length is twice the average value. When in use, the screening unit vibrates, and the rice with rice stalks accumulates above the upper movable screen 13. Through the setting of the double-layer staggered diamond sieve holes 18, the rice first falls from the upper diamond sieve holes 18 to the lower fixed screen 14 after vibration, and then falls from the lower diamond sieve holes 18 to be output from the output assembly, while the shorter rice stalks are clamped in the upper diamond sieve holes 18. The staggered setting can prevent the upright rice stalks from falling directly. By controlling the spacing between the upper movable screen 13 and the lower fixed screen 14, the rice can pass through, while the rice stalks are blocked. Then, the air is discharged through the air selection mechanism through the air trough 16 to separate the rice stalks and the rice, and the separation effect is good. The position of the upper movable screen 13 can be quickly adjusted by turning the height adjustment bolt 15.

[0023] The two frames 7 are fixedly connected by an elastic sealing belt 17, and the elastic sealing belt 17 prevents rice from leaking out of the gap.

[0024] The annular conveying mechanism includes a sprocket 2 that is driven by a motor to rotate in the inner cavity of a shell 19 and a chain 3 that is driven by the sprocket 2. A plurality of transmission members 4 that are arranged in an annular array are fixedly connected to the surface of the chain 3. An elastic plate 5 is fixedly connected to one side of the transmission member 4. A connecting plate 6 located on the side of a frame 7 is fixedly connected to one side of the elastic plate 5. The two connecting plates 6 are driven to move in an annular manner through the transmission chains 3 on both sides. The two connecting plates 6 are respectively arranged on both sides of the frame 7, which can drive the frame 7 to move. In addition, through the arrangement of the elastic plate 5, the influence of the vibration of the frame 7 on the transmission member 4 is reduced to filter vibration.

[0025] The air selection component includes a screening air duct 20 connected to the fan and arranged on the surface of the shell 19 and a cleaning air duct 11 arranged on the side of the right frame 7. The screening air duct 20 is used to discharge air to the frame 7 to separate rice from rice straw. The cleaning air duct 11 is used to discharge air to the right-side screened frame 7 to blow out the residual rice straw inside for cleaning, thereby achieving a better separation effect.

[0026] The vibration assembly includes a cam 8 rotatably arranged in the inner cavity of the shell 19. The rotation trajectory of the cam 8 coincides with the side of the frame 7. The cam 8 is continuously rotated by the motor and contacts the top of the frame 7, driving the frame 7 to vibrate for screening. Several cams 8 can vibrate multiple frames 7, and do not need to be transmitted together with the frame 7, which is more stable and has a simpler structure.

[0027] The output component includes a receiving hopper 9 fixed in the inner cavity of the shell 19. The receiving hopper 9 is located below the upper multiple interconnected frames 7. The bottom of the receiving hopper 9 is connected to an output channel 10. The output channel 10 extends and passes through the outside of the shell 19. The screened rice leaks from the frame 7 into the receiving hopper 9, and then is concentrated in the output channel 10 and transported to the outside.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel belt-type vibrating screening machine, comprising a frame (1), an annular conveying mechanism arranged above the frame (1), a plurality of screening units connected end to end and driven to move by the annular conveying mechanism, a wind selection assembly for wind selection of rice and rice stalks, a vibration assembly for vibrating the screening units, and an output assembly for outputting rice, characterized in that: The surface of the frame (1) is sleeved with a shell (19), and the top of the shell (19) is provided with a feed inlet located above the screening unit; The screening unit comprises a frame (7), the bottom of the inner cavity of the frame (7) is fixedly connected to a lower fixed screen (14), the inner cavity of the frame (7) is slidably connected to an upper movable screen (13), the bottom of the lower fixed screen (14) is threadedly connected to a height adjustment bolt (15), the top of the height adjustment bolt (15) passes through the lower fixed screen (14) and abuts against the bottom of the upper movable screen (13), and the top of the frame (7) is provided with a bolt for adjusting the upper movable screen. (13) A stepped groove (12) for limiting the position, the side of the frame (7) is provided with an air-through groove (16) located on the side of the air selection component, the inner cavities of the upper movable screen (13) and the lower fixed screen (14) are both provided with diamond-shaped screen holes (18), and the diamond-shaped screen holes (18) of the upper movable screen (13) and the lower fixed screen (14) are arranged in an upper and lower staggered manner, and the spacing between the upper movable screen (13) and the lower fixed screen (14) is twice the average length of rice grains.

2. A novel belt-type vibrating screening machine according to claim 1, characterized in that: The two frames (7) are fixedly connected via an elastic sealing belt (17).

3. A novel belt-type vibrating screening machine according to claim 1, characterized in that: The annular conveying mechanism comprises a sprocket (2) rotatably arranged in the inner cavity of a housing (19) driven by a motor and a chain (3) driven by the sprocket (2); a surface of the chain (3) is fixedly connected to a plurality of transmission members (4) arranged in an annular arrangement; one side of the transmission member (4) is fixedly connected to an elastic plate (5); one side of the elastic plate (5) is fixedly connected to a connecting plate (6) located on the side of a frame (7).

4. A novel belt-type vibrating screening machine according to claim 1, characterized in that: The air selection component comprises a screening air duct (20) connected to the fan and arranged on the surface of the shell (19) and a cleaning air duct (11) arranged on the side of the right frame (7).

5. A novel belt-type vibrating screening machine according to claim 1, characterized in that: The vibration component comprises a cam (8) rotatably arranged in the inner cavity of a shell (19), and the rotation track of the cam (8) coincides with the side edge of the frame (7).

6. A novel belt-type vibrating screening machine according to claim 1, characterized in that: The output assembly comprises a receiving hopper (9) fixed in the inner cavity of the shell (19), the receiving hopper (9) being located below a plurality of upper interconnected frames (7), the bottom of the receiving hopper (9) being connected to an output channel (10), and the output channel (10) extending and penetrating to the outside of the shell (19).

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