Wheat seed screening device

Abstract

The utility model discloses a wheat seed screening device, which relates to the technical field of agricultural equipment and comprises a rack, a control box, a screening cylinder, a driving device and an impurity removing device, the control box, the screening cylinder and the driving device are arranged on the rack, the impurity removing device is used for removing impurities in wheat, a screening cylinder is arranged in the screening cylinder, and an impurity discharging hopper is arranged at the bottom of the screening cylinder. A conveying pipe is concentrically and fixedly installed at one end of the screening cylinder and communicates with the interior of the screening cylinder, and a discharging pipe inclining downwards is fixedly installed at the bottom of the other end of the screening cylinder. A window is formed in the front side of the screening barrel, an observation window is hinged to the interior of the window in a matched mode, the screening barrel comprises an outer screen and an inner screen, and a plurality of handles are evenly and fixedly installed on the outer screen along the circumference. According to the wheat seed screening device, through the design of the adjustable screening holes, the screening requirements of various wheat varieties can be met, the universality and practicability of the device are improved, unqualified wheat seeds and impurities can be more accurately separated out, and the screening precision and the seed quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural equipment, in particular to a wheat seed screening device. Background Art

[0002] Wheat seed screening device is an important equipment used in agricultural production to improve the quality of wheat seeds. Its main purpose is to separate impurities (such as stones, straw, dust, etc.) and unqualified seeds (such as broken and underdeveloped seeds) from wheat seeds through physical or mechanical methods, thereby ensuring that the sown seeds have good germination rate and growth potential.

[0003] Chinese utility model patent application number CN202321759508.0 discloses a wheat seed screening device comprising a housing, an inner wall of which is mounted a filter plate for screening wheat seeds, a plurality of return springs fixedly connected to one outer wall of the filter plate, a fixed pulley fixedly connected to the outer wall of the filter plate where the return springs are located, and a vibration assembly mounted on the outer wall of the housing for reciprocating the filter plate. The wheat seed screening device, through the vibration assembly, causes the filter plate to vibrate back and forth, thereby vibrating and screening wheat seeds that fall on the filter plate surface. Dust and impurities contained in the wheat seeds fall through the filter holes in the filter plate into a waste bin, while the wheat seeds are discharged through the discharge port, thereby saving labor and improving screening efficiency. However, the device cannot screen stones of the same shape and size as wheat. Moreover, because different varieties of wheat vary in size and shape, the size of the filter plate pores in the device cannot be adjusted, making it impossible to screen different varieties of wheat seeds.

[0004] Therefore, it is necessary to propose a wheat seed screening device to solve the above problems. Utility Model Content

[0005] Technical problem to be solved: The purpose of the present invention is to provide a wheat seed screening device to solve the problem raised in the above background technology that different varieties of wheat have differences in size, shape, etc., and the existing wheat seed screening device cannot fully adapt to these differences.

[0006] Technical solution: To achieve the above purpose, the utility model is implemented through the following technical solutions: a wheat seed screening device, including a frame, a control box, a screening drum, a driving device and an impurity removal device for removing impurities in wheat, the interior of the screening drum is provided with a screening drum, the bottom is provided with a discharge bucket, one end of the screening drum is fixedly installed with a feed pipe concentrically, the feed pipe is connected to the interior of the screening drum, and the bottom of the other end of the screening drum is fixedly installed with a downwardly inclined discharge pipe; the front side of the screening drum is provided with a window, and the window is hinged with an observation window, and the screening drum includes an outer The screen and the inner screen, the outer screen is evenly fixed with multiple handles along the circumference, the inner screen is fixedly sleeved in the screening cylinder, the outer screen is threadedly sleeved on the inner screen, and the side walls of the outer screen and the inner screen are axially provided with multiple screening groups, the screening groups include multiple rectangular sieve holes evenly arranged along the circumference; the input end of the impurity removal device is provided with a feed hopper, and the output end is connected to the inside of the feed pipe, a drive shaft is rotatably sleeved in the feed pipe, and the drive shaft is transmission-connected to the drive device, a spiral blade is fixedly sleeved on the drive shaft in the feed pipe, and one end of the drive shaft extends into the screen cylinder and is fixedly installed with a scraper.

[0007] Preferably, the driving device includes a driving motor and a driving box fixedly installed at the end of the conveying pipe, one end of the driving shaft extends into the driving box and is fixedly fitted with a second pulley, the output shaft of the driving motor extends into the driving box and is fitted with a first pulley, and the first pulley and the second pulley are connected by a belt drive.

[0008] Preferably, a feeding mechanism is provided in the feed hopper, which includes a motor fixedly mounted on the upper portion of the feed hopper and an auger rotatably mounted in the output end of the feed hopper, wherein the auger is transmission-connected to the motor.

[0009] Preferably, the impurity removal device includes a screening chamber arranged above the material conveying pipe, and the screening chamber is provided with four connecting pipes at the top and bottom, front and back, respectively, and the four connecting pipes are distributed in a cross shape.

[0010] Preferably, the lower end of the lower connecting pipe is fixedly installed with a debris discharge pipe, the feed hopper is fixedly installed on the top of the upper connecting pipe, the front end of the front connecting pipe is fixedly installed with a T-shaped tee pipe, the lower end of the T-shaped tee pipe is connected to the interior of the feed pipe, the front end of the T-shaped tee pipe is fixedly installed with a Z-shaped pipe, the other end of the Z-shaped pipe is fixedly covered with a dust removal bag, and the rear end of the rear connecting pipe is fixedly installed with a fan.

[0011] Preferably, a downwardly concave arc tube is provided in the middle of the horizontal tube of the T-shaped tee pipe, and the vertical tube of the T-shaped tee pipe is fixedly installed at the bottom of the arc tube.

[0012] Beneficial effect: Compared with the prior art, the utility model provides a wheat seed screening device with a unique structure and easy use. The wheat seeds enter the screening chamber through the feed hopper. In the screening chamber, the wind force generated by the fan preliminarily separates the wheat and impurities. During separation, heavy impurities such as stones are discharged from the discharge pipe, while the wheat and light impurities are blown to the T-shaped three-way pipe. In the T-shaped three-way pipe, since the mass of wheat is greater than that of straw and dust, the wheat enters the vertical pipe under the action of gravity and flows into the feed pipe, while the straw and dust enter the dust removal bag through the Z-shaped pipe under the action of wind for collection. The wheat entering the feed pipe is transported into the screen drum under the push of the first auger. The screen drum is composed of an outer screen and an inner screen, which are connected by threads to form adjustable screen holes. The scraper rotates with the drive shaft and continuously stirs the wheat in the screen drum, so that broken, underdeveloped wheat and small particles of impurities pass through the screen holes and are discharged through the discharge hopper, and qualified wheat is discharged through the discharge port.

[0013] The adjustable sieve hole design can not only adapt to the screening needs of various wheat varieties, improving the versatility and practicality of the equipment, but also can more accurately separate unqualified wheat seeds and impurities, improving screening accuracy and seed quality; in addition, through the design of the impurity removal device and dust removal bag, not only can wheat and impurities be separated, but also light impurities can be collected, reducing environmental pollution. At the same time, the entire impurity removal device has a simple structure and the screening process has low energy consumption, which meets the requirements of environmental protection and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional main view schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a three-dimensional side view schematic diagram of the structure of the utility model;

[0016] Figure 3 It is a cross-sectional schematic diagram of the structure of the utility model;

[0017] Figure 4 This is a cross-sectional schematic diagram of the feed hopper structure of the present invention;

[0018] Figure 5 It is a three-dimensional side view schematic diagram of the screening drum structure of the present invention;

[0019] Figure 6 This is a plan view of the T-shaped three-way pipe structure in Example 3 of the present utility model.

[0020] In the figure: 1. Frame; 2. Control box; 3. Screen drum; 4. Discharge hopper; 5. Screen drum; 6. Feed pipe; 7. Drive box; 8. Drive motor; 9. First pulley; 10. Second pulley; 11. Drive shaft; 12. Spiral blade; 13. Scraper; 14. Screen chamber; 15. Fan; 16. Discharge pipe; 17. T-type tee; 18. Z-type pipe; 19. Dust bag; 20. Feed hopper; 21. Auger; 22. Motor; 23. Observation window; 24. Discharge pipe; 25. Outer screen; 26. Inner screen; 27. Handle. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1: This example 1 provides a wheat seed screening device, which is directly improved on the existing wheat seed screening device and has a unique structure. Please refer to Figure 1-6 As shown, it includes a frame 1, a control box 2, a screening drum 3 and a driving device arranged on the frame 1, a screening drum 5 is provided inside the screening drum 3, and a debris discharge bucket 4 is provided at the bottom. The debris discharge bucket 4 is a conical structure with a large upper end and a small lower end. A feeding pipe 6 is concentrically fixedly installed at one end of the screening drum 3, and the feeding pipe 6 is connected to the interior of the screening drum 5. A downwardly inclined discharge pipe 24 is fixedly installed at the bottom of the other end of the screening drum 3; a window is provided on the front side of the screening drum 3, and an observation window 23 is hingedly connected to the window. The screening drum 5 includes an outer screen 25 and an inner screen 26. A plurality of handles 27 are evenly fixedly installed on the outer screen 25 along the circumference. The inner screen 26 is fixedly sleeved on the screening drum In the separator 3, the outer screen 25 is threadedly mounted on the inner screen 26, and a plurality of screening groups are axially provided on the side walls of the outer screen 25 and the inner screen 26. The screening groups include a plurality of rectangular screen holes evenly arranged along the circumference. In the initial state, the screen holes on the outer screen 25 and the inner screen 26 correspond to each other one by one. When screening different varieties of wheat, the size of the screen holes on the screen cylinder 5 can be adjusted in real time according to the diameter and length of qualified wheat, so that the screening is more accurate. When adjusting the screen holes of the screen cylinder 5, it is only necessary to hold the handle 27 and rotate the outer screen 25 to offset the corresponding screen holes on the outer screen 25 and the inner screen 26, thereby changing the size of the screen holes of the screen cylinder 5.

[0023] The input end of the impurity removal device is provided with a feed hopper 20, and the output end is connected to the inside of the conveying pipe 6. A drive shaft 11 is rotatably mounted in the conveying pipe 6, and the drive shaft 11 is transmission-connected to the driving device. The driving device includes a drive motor 8 and a drive box 7 fixedly mounted on the end of the conveying pipe 6. One end of the drive shaft 11 extends into the drive box 7 and is fixedly mounted with a second pulley 10. The output shaft of the drive motor 8 extends into the drive box 7 and is mounted with a first pulley 9. The first pulley 9 and the second pulley 10 are connected by belt drive. There are various ways to install the drive shaft 11. For example, bearing seats are provided at the end of the screening drum 3 away from the drive box 7 and the inside of the conveying pipe 6. The drive shaft 11 is rotatably mounted on the two bearing seats through bearings.

[0024] A spiral blade 12 is fixedly mounted on the driving shaft 11 in the feed pipe 6. One end of the driving shaft 11 extends into the screen drum 5 and is fixedly mounted with a scraper 13. A screening chamber 14 is provided above the feed pipe 6. The screening chamber 14 is provided with four connecting pipes, upper and lower, front and back, respectively, and the four connecting pipes are distributed in a cross shape. There are multiple scrapers 13, and multiple scrapers 13 are evenly mounted on the driving shaft 11 along the circumference. There are various ways to mount the spiral blades 12 and the scrapers 13. For example, two sleeves are spaced apart on the driving shaft 11, and both sleeves are provided with mounting holes for mounting screws. The two sleeves are fixedly mounted on the drive shaft 11 by screws, and the spiral blades 12 and the scrapers 13 are welded to the two sleeves respectively.

[0025] A discharge pipe 16 is fixedly installed at the lower end of the lower connecting pipe, a feed hopper 20 is fixedly installed at the top of the upper connecting pipe, a T-shaped three-way pipe 17 is fixedly installed at the front end of the front connecting pipe, the lower end of the T-shaped three-way pipe 17 is connected to the interior of the conveying pipe 6, a Z-shaped pipe 18 is fixedly installed at the front end of the T-shaped three-way pipe 17, and a dust removal bag 19 is fixedly installed at the other end of the Z-shaped pipe 18, and a fan 15 is fixedly installed at the rear end of the rear connecting pipe. The external power supply supplies power to the drive device and the fan 15 through the control box 2, so that the operator can control the opening and closing of the drive motor 8 and the fan 15 through the control box 2.

[0026] When we use the screening device to screen wheat seeds, we first adjust the size of the screen holes of the screen drum 5 according to the size of the qualified seeds, start the drive motor 8 and the fan 15 at the same time, and then pour wheat into the feed hopper 20. The wheat flows into the screening chamber 14 under the action of gravity. After entering the screening chamber 14, the wheat will be affected by the wind. At this time, the wheat and the sundries mixed in the wheat are screened under the action of the wind. Since the weight of the stone is large, it is less affected by the wind and will be discharged from the discharge pipe 16. The weight of the wheat, straw and dust is lighter and will be blown into the T-shaped three-way pipe 17 by the wind. Moreover, since the weight of the wheat is greater than that of the stone, the sundries will be discharged from the discharge pipe 16. Straw and dust, so after the wheat enters the T-shaped three-way pipe 17, it will enter the feed pipe 6 from the vertical pipe of the T-shaped three-way pipe 17, and the straw and dust will enter the dust removal bag 19 through the Z-shaped pipe 18 under the action of wind. The dust removal bag 19 can collect dust and straw, thereby avoiding environmental pollution; the wheat entering the feed pipe 6 is transported to the screen drum 5 under the action of the spiral blade 12, and then the scraper 13 continuously stirs the wheat in the screen drum 5, so that the broken and underdeveloped wheat passes through the sieve holes of the screen drum 5 and flows out through the discharge bucket 4, while the qualified wheat flows out through the discharge pipe 24, thus completing the screening of wheat seeds.

[0027] Example 2: The difference between Example 2 and Example 1 is that Figure 4 As shown, a feeding mechanism is provided in the feed hopper 20, which includes a motor 22 fixedly mounted on the upper part of the feed hopper 20, and an auger 21 rotatably mounted in the output end of the feed hopper 20. The auger 21 is transmission-connected to the motor 22. There are various ways of connecting the auger 21 and the motor 22, for example: the auger shaft is fixedly connected to the output shaft of the motor 22 through a coupling. By arranging a feeding mechanism in the feed hopper 20, not only can the wheat be evenly transported to the feed pipe 6, but the flow rate of the wheat from the feed hopper 20 to the feed pipe 6 can be adjusted according to the wind speed of the fan 15, so as to better screen the stones and straw in the wheat and improve the screening effect.

[0028] Example 3: The difference between Example 3 and Example 1 is that Figure 6 As shown, a downwardly concave arc tube is provided in the middle of the horizontal tube of the T-shaped tee 17, and the vertical tube of the T-shaped tee 17 is fixedly installed at the bottom of the arc tube. By arranging the arc tube on the T-shaped tee 17, wheat can be prevented from accumulating in the T-shaped tee 17, making it easier for wheat to flow into the feed pipe 6.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheat seed screening device, comprising a frame (1), characterized in that: The invention also includes a control box (2) arranged on the frame (1), a screening drum (3), a driving device and an impurity removal device for removing impurities from wheat, wherein a screening drum (5) is provided inside the screening drum (3) and a discharge bucket (4) is provided at the bottom. A feed pipe (6) is fixedly installed concentrically at one end of the screening drum (3), and the feed pipe (6) is communicated with the interior of the screening drum (5). A discharge pipe (24) inclined downward is fixedly installed at the bottom of the other end of the screening drum (3); a window is provided on the front side of the screening drum (3), and an observation window (23) is hingedly connected to the window. The screening drum (5) includes an outer screen (25) and an inner screen (26). A plurality of handles (27) are fixedly installed uniformly along the circumference of the outer screen (25). ), the inner screen (26) is fixedly mounted in the screening cylinder (3), the outer screen (25) is threadedly mounted on the inner screen (26), and a plurality of screening groups are axially arranged on the side walls of the outer screen (25) and the inner screen (26), and the screening groups include a plurality of rectangular screen holes uniformly arranged along the circumference; the input end of the impurity removal device is provided with a feed hopper (20), and the output end is communicated with the interior of the feed pipe (6), a drive shaft (11) is rotatably mounted in the feed pipe (6), and the drive shaft (11) is transmission-connected to the drive device, a spiral blade (12) is fixedly mounted on the drive shaft (11) in the feed pipe (6), and one end of the drive shaft (11) extends into the screen cylinder (5) and is fixedly mounted with a scraper (13).

2. A wheat seed screening device according to claim 1, characterized in that: The driving device comprises a driving motor (8) and a driving box (7) fixedly mounted on the end of the conveying pipe (6); one end of the driving shaft (11) extends into the driving box (7) and is fixedly fitted with a second pulley (10); the output shaft of the driving motor (8) extends into the driving box (7) and is fitted with a first pulley (9); the first pulley (9) and the second pulley (10) are connected via a belt drive.

3. The wheat seed screening device according to claim 1, characterized in that: A feeding mechanism is provided in the feed hopper (20), the feeding mechanism comprising a motor (22) fixedly mounted on the upper portion of the feed hopper (20), and a screw auger (21) rotatably mounted in the output end of the feed hopper (20), the screw auger (21) being in transmission connection with the motor (22).

4. The wheat seed screening device according to claim 1, characterized in that: The impurity removal device comprises a screening chamber (14) arranged above the material conveying pipe (6), and the screening chamber (14) is provided with four connecting pipes, one above the other and one behind the other, and the four connecting pipes are distributed in a cross shape.

5. The wheat seed screening device according to claim 4, characterized in that: The lower end of the lower connecting pipe is fixedly mounted with a discharge pipe (16), the feed hopper (20) is fixedly mounted on the top of the upper connecting pipe, the front end of the front connecting pipe is fixedly mounted with a T-shaped three-way pipe (17), the lower end of the T-shaped three-way pipe (17) is communicated with the interior of the feed pipe (6), the front end of the T-shaped three-way pipe (17) is fixedly mounted with a Z-shaped pipe (18), the other end of the Z-shaped pipe (18) is fixedly sleeved with a dust removal bag (19), and the rear end of the rear connecting pipe is fixedly mounted with a fan (15).

6. The wheat seed screening device according to claim 5, characterized in that: A downwardly concave arc tube is provided in the middle of the horizontal tube of the T-shaped three-way pipe (17), and the vertical tube of the T-shaped three-way pipe (17) is fixedly installed at the bottom of the arc tube.

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