Grain screening device

Abstract

The utility model belongs to the technical field of screening devices, and particularly relates to a grain screening device which comprises a screening box body, a feeding hopper is arranged on the upper side of the screening box body, an installation base is fixedly connected to the upper side of the screening box body, an air blower is fixedly installed on the upper side of the installation base, and the left end of the air blower is fixedly connected with the right side of the feeding hopper. A communicating pipe is fixedly connected to the left side of the feeding hopper, inserting holes are formed in the upper portion and the lower portion of the left side face of the screening box body, vibration blocks are slidably connected to the front wall and the rear wall of the inner side of each inserting hole, and discharging openings are formed in the upper portion and the lower portion of the right side face of the screening box body. A large number of empty grains and dust impurities in grains are mixed, screening is troublesome, and when grains of different types and different qualities are mixed, rapid screening cannot be conducted; the problems that according to an existing device, different types of screens cannot be replaced according to the types of screened grains, and when the screens are damaged after being used for a long time, maintenance and replacement are inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, in particular to a grain screening device. Background Art

[0002] Cereals cover a wide range, including rice, wheat, millet, soybeans and other grains, mainly plant seeds and fruits, and are the traditional staple food of many Asian people. Cereals harvested from farmland must first be threshed to obtain grains, and then the grains need to be screened through grain screening devices to separate the grains from the debris mixed in the grains.

[0003] When the existing device screens grains, many empty grains and dust impurities are mixed in the grains, making screening more troublesome. In addition, when grains of different types, qualities and sizes are mixed, they cannot be screened quickly. In addition, in the existing devices, the screens are mostly fixedly installed inside the devices, and different types of screens cannot be replaced according to the types of grains to be screened. When the screens are damaged after long-term use, it is also inconvenient to repair and replace them. Utility Model Content

[0004] The purpose of the utility model is to provide a grain screening device to solve the problem that when the existing device proposed in the above background technology screens grains, a large number of empty grains and dust impurities are mixed in the grains, screening is more troublesome, and grains of different types and qualities and sizes cannot be screened quickly; the existing device cannot replace different types of screens according to the type of screened grains, and when the screen is damaged after long-term use, it is inconvenient to repair and replace it.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grain screening device, comprising a screening box, a feed hopper is provided on the upper side of the screening box, a mounting seat is fixedly connected to the upper side of the screening box, a blower is fixedly installed on the upper side of the mounting seat, the left end of the blower is fixedly connected to the right side of the feed hopper, a connecting pipe is fixedly connected to the left side of the feed hopper, insertion holes are provided on the upper and lower sides of the left side surface of the screening box, the front and rear walls inside the insertion holes are slidably connected with a vibration block, the right side surface of the screening box is provided with discharge ports on the upper and lower sides, the right side surface of the screening box is connected with a material guide piece on the upper and lower sides, a pulling piece is inserted through the left and right sides of the vibration block, a screen is fixedly connected to the right side of the pulling piece, a fixing piece is hinged on the right side of the screen, and the fixing piece is arranged on the inner side of the material guide piece.

[0006] Preferably, a connecting plate is fixedly connected to the left side of the screening box, a collecting box is movably provided on the upper side of the connecting plate, and the collecting box is located below the connecting pipe.

[0007] Preferably, the material discharge port corresponds to the material guide member, and the front and rear walls on the inner side of the material guide member are fixedly connected to a limiting block, and the limiting block is located on the upper side of the fixing member.

[0008] Preferably, the upper and lower walls inside the insertion hole are evenly connected with springs, and the opposite ends of the springs on the upper and lower sides are fixedly connected to the upper and lower sides of the vibration block.

[0009] Preferably, a side panel is fixedly connected to the left side of the screening box, a motor is fixedly installed on the left side of the side panel, a driving gear is rotatably connected to the right side of the side panel, the left end of the driving gear is fixedly connected to the output end of the motor, and a driven gear is symmetrically rotatably connected to the right side surface of the side panel, the driven gear is meshed with the driving gear, a cam is fixedly connected to the right side of the driven gear, and the cam corresponds to the vibration block.

[0010] Preferably, the aperture of the upper screen is larger than that of the lower screen, a slope is fixedly provided at the bottom of the inner side of the screening box, a discharge box door is hinged on the front side of the screening box, and the slope corresponds to the discharge box door.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1) When in use, the grains are introduced from the feed hopper, and then the blower and the motor are started. During the falling process of the grains, the blower blows out the empty grains and dust in the grains, and passes them into the inner side of the collecting box from the connecting pipe. Then the grains fall to the upper screen. After the motor is started, it drives the driving gear to rotate. The driving gear drives the upper and lower driven gears to rotate through meshing, and drives the two cams to rotate, continuously pushing the vibration block to slide up and down in the insertion hole, thereby driving the screen to vibrate, so that larger grains are intercepted from the upper screen, medium grains are intercepted on the upper side of the lower screen, and smaller grains fall through the lower screen and gather on the slope. The three sizes of grains are respectively discharged through the upper and lower material guides and the discharge box door discharge device to complete the screening.

[0013] 2) When the screen needs to be replaced, the screen can be pulled out from the inner side of the vibration block and the material guide by pulling the pulling piece on the left side of the screen, and then the new screen can be reinserted into the inner side of the vibration block and the material guide. The replacement is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the screening box;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the side panel;

[0017] Figure 4It is a schematic diagram of the three-dimensional structure of the vibration block.

[0018] In the figure: 1. screening box, 2. feed hopper, 3. mounting seat, 4. blower, 5. connecting pipe, 6. insertion hole, 7. vibration block, 8. discharge port, 9. material guide, 10. pulling member, 11. screen, 12. fixing member, 13. connecting plate, 14. collecting box, 15. limit block, 16. spring, 17. side plate, 18. motor, 19. driving gear, 20. driven gear, 21. cam, 22. ramp, 23. discharge box door. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Example:

[0022] See also Figure 1-4The utility model provides a technical solution: a grain screening device comprises a screening box 1, a feed hopper 2 is provided on the upper side of the screening box 1, grains are introduced from the feed hopper 2, a mounting seat 3 is fixedly connected to the upper side of the screening box 1, a blower 4 is fixedly installed on the upper side of the mounting seat 3, the left end of the blower 4 is fixedly connected to the right side of the feed hopper 2, in the process of grain falling, the blower 4 blows out the empty grains and dust in the grains, a connecting pipe 5 is fixedly connected to the left side of the feed hopper 2, after the empty grains and dust are blown out, they are passed from the connecting pipe 5 into the inner side of the collecting box 14, and the left side of the screening box 1 Insertion holes 6 are provided at the top and bottom, and the front and rear walls inside the insertion holes 6 are slidably connected with vibration blocks 7. Discharge ports 8 are provided at the top and bottom of the right side surface of the screening box body 1, and the right side surface of the screening box body 1 is connected with material guide members 9 at the top and bottom. Pulling members 10 are inserted through the left and right sides of the vibration block 7. The pulling member 10 on the left side of the screen 11 is pulled to pull the screen out from the inner side of the vibration block 7 and the material guide member 9. The right side of the pulling member 10 is fixedly connected with the screen 11, and the right side of the screen 11 is hinged with a fixing member 12 so that the vibration of the screen does not affect the fixing member 12. The fixing member 12 is arranged on the inner side of the material guide member 9.

[0023] Among them, a connecting plate 13 is fixedly connected to the left side of the screening box 1, and a collecting box 14 is movably provided on the upper side of the connecting plate 13. The collecting box 14 is located below the connecting pipe 5. The discharge port 8 corresponds to the material guide member 9. The front and rear walls on the inner side of the material guide member 9 are fixedly connected to a limiting block 15. The limiting block 15 is located on the upper side of the fixing member 12. The limiting block 15 is used to fix the screen 11. The upper and lower walls on the inner side of the insertion hole 6 are evenly connected with springs 16. The opposite ends of the springs 16 on the upper and lower sides are fixedly connected to the upper and lower sides of the vibration block 7. When the cam 21 lifts the vibration block 7, the functions of rebound and shock absorption buffering during vibration of the vibration block 7 are met. A side plate 17 is fixedly connected to the left side of the screening box 1, and a motor 18 is fixedly installed on the left side of the side plate 17. A driving gear 19 is rotatably connected to the right side of the side plate 17, and the left end of the driving gear 19 is fixedly connected to the output end of the motor 18 The right side surface of the side plate 17 is connected with a driven gear 20 which rotates symmetrically up and down. The driven gear 20 meshes with the driving gear 19. A cam 21 is fixedly connected to the right side of the driven gear 20. The cam 21 corresponds to the vibration block 7. The cam 21 rotates, continuously pushing the vibration block 7 to slide up and down in the insertion hole 6, thereby driving the screen 11 to vibrate. The aperture of the upper screen 11 is larger than the aperture of the lower screen 11, so that larger grains are intercepted from the upper screen 11, and medium grains are intercepted on the upper side of the lower screen 11. Small grains fall through the lower screen 11 and gather on the slope 22. The three sizes of grains are discharged from the upper and lower side guides 9 and the discharge box door 23 to complete the screening. The bottom of the inner side of the screening box 1 is fixedly provided with a slope 22, and the front side of the screening box 1 is hinged with a discharge box door 23, and the slope 22 corresponds to the discharge box door 23.

[0024] Working principle: When in use, the grains are introduced from the feed hopper 2, and then the blower 4 and the motor 18 are started. During the falling process of the grains, the blower 4 blows out the empty grains and dust in the grains, and passes them into the inner side of the collecting box 14 from the connecting pipe 5. Then the grains fall to the upper screen 11. After the motor 18 is started, it drives the driving gear 19 to rotate. The driving gear 19 drives the upper and lower driven gears 20 to rotate through meshing, and drives the two cams 21 to rotate, continuously pushing the vibration block 7 to slide up and down in the insertion hole 6, thereby driving the screen 1 1 vibrates, so that larger grains are intercepted from the upper screen 11, medium grains are intercepted on the upper side of the lower screen 11, and smaller grains fall through the lower screen 11 and gather on the slope 22. The three sizes of grains are discharged from the device through the upper and lower guide members 9 and the discharge box door 23 respectively, and the screening is completed. When the screen 11 needs to be replaced, the screen is pulled out from the inner side of the vibration block 7 and the guide member 9 by pulling the pulling member 10 on the left side of the screen 11, and then the new screen 11 is reinserted into the inner side of the vibration block 7 and the guide member 9.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grain screening device, comprising a screening box (1), characterized in that: A feed hopper (2) is provided on the upper side of the screening box (1), a mounting seat (3) is fixedly connected to the upper side of the screening box (1), a blower (4) is fixedly installed on the upper side of the mounting seat (3), the left end of the blower (4) is fixedly connected to the right side of the feed hopper (2), a connecting pipe (5) is fixedly connected to the left side of the feed hopper (2), and an insertion hole (6) is provided on the upper and lower sides of the left side surface of the screening box (1), and the front and rear walls inside the insertion hole (6) are A vibration block (7) is slidably connected to the right side of the screening box (1), a discharge port (8) is opened at the top and bottom of the right side of the screening box (1), a material guide (9) is connected to the top and bottom of the right side of the screening box (1), a pulling member (10) is inserted through the left and right sides of the vibration block (7), a screen (11) is fixedly connected to the right side of the pulling member (10), a fixing member (12) is hinged on the right side of the screen (11), and the fixing member (12) is arranged on the inner side of the material guide (9).

2. A grain screening device according to claim 1, characterized in that: A connecting plate (13) is fixedly connected to the left side of the screening box (1), and a collecting box (14) is movably provided on the upper side of the connecting plate (13), and the collecting box (14) is located below the connecting pipe (5).

3. A grain screening device according to claim 1, characterized in that: The material discharge port (8) corresponds to the material guide member (9), and the front and rear walls inside the material guide member (9) are fixedly connected to a limit block (15), and the limit block (15) is located on the upper side of the fixing member (12).

4. A grain screening device according to claim 1, characterized in that: The upper and lower walls inside the insertion hole (6) are evenly connected with springs (16), and the opposite ends of the springs (16) on the upper and lower sides are fixedly connected to the upper and lower sides of the vibration block (7).

5. A grain screening device according to claim 1, characterized in that: The left side of the screening box (1) is fixedly connected to a side plate (17), the left side of the side plate (17) is fixedly mounted with a motor (18), the right side of the side plate (17) is rotatably connected to a driving gear (19), the left end of the driving gear (19) is fixedly connected to an output end of the motor (18), the right side of the side plate (17) is symmetrically rotatably connected to a driven gear (20) in an up-and-down manner, the driven gear (20) is meshed with the driving gear (19), the right side of the driven gear (20) is fixedly connected to a cam (21), and the cam (21) corresponds to the vibration block (7).

6. A grain screening device according to claim 1, characterized in that: The aperture of the upper screen (11) is larger than the aperture of the lower screen (11); a slope (22) is fixedly provided at the bottom of the inner side of the screening box (1); a discharge box door (23) is hingedly connected to the front side of the screening box (1); and the slope (22) corresponds to the discharge box door (23).

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