A device for screening improved varieties of desert Caragana korshinskii

Abstract

The present invention discloses a device for screening improved varieties of desert caragana korshinskii, which relates to the technical field of screening devices, and comprises a vertical support and a horizontal support, wherein a feed barrel is mounted on the support via a gravity-changing mechanism, and the gravity-changing mechanism performs adaptive compression as the weight of the piled material in the feed barrel changes. The device further comprises: a sieve bucket 1 and a sieve bucket 2, both of which are arranged on the horizontal support, and the sieve bucket 1 is located above the sieve bucket 2. The advantages are that the present invention automatically adjusts the screening angle of the sieve bucket according to the weight change of the caragana korshinskii seeds to be screened, and when the screening weight increases, the residence time of the seeds on the sieve bucket is increased, the vibration amplitude is increased so that the seeds are dispersed and pass through the sieve holes more quickly, thus avoiding seed accumulation and greatly improving the processing volume per unit time. On the contrary, when the screening weight decreases, the screening angle is appropriately increased and the vibration amplitude is reduced, which can effectively increase the screening speed and improve the overall screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of screening devices, in particular to a screening device for improved varieties of Caragana korshinskii. Background Art

[0002] Desert Caragana korshinskii is one of the important plants in the desert ecosystem. By screening its excellent varieties, we can promote desert greening and ecological restoration, and prevent desertification and land degradation. In desert areas, due to harsh environmental conditions, manual screening is not only time-consuming and labor-intensive, but also difficult to be systematic and scientific. In order to improve planting efficiency and enhance species quality, the use of automated equipment can greatly reduce manual input, while improving the standardization and repeatability of the screening process.

[0003] When the yield of Caragana korshinskii seeds is large, due to their heavy weight and large quantity, if the screen angle is fixed and small, the seeds will easily form a thick accumulation layer on the screen surface, hindering the contact between the upper seeds and the screen, and the screening speed will be greatly reduced; the vibration amplitude is insufficient, and it is difficult to promote the rapid dispersion and movement of seeds, resulting in the sieve holes being blocked, and the screening is forced to be interrupted. Frequent shutdowns are required to clean the screen, reducing the overall production efficiency. Different pile weights require different appropriate screening speeds. Fixed screening parameters cannot adapt to seeds of different weights. When the pile weight is small, the screening speed is too fast, and the seeds pass through the screen before they have time to be fully screened. When the weight is large, the screening speed is too slow, and the processing capacity is insufficient, resulting in waste of resources. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of low screening efficiency in the prior art and to propose a screening device for improved varieties of Caragana korshinskii.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for screening improved varieties of desert caragana korshinskii, comprising a vertical support and a horizontal support, wherein a feed barrel is mounted on the vertical support via a gravity-changing mechanism, and the gravity-changing mechanism performs adaptive compression as the weight of the pile in the feed barrel changes, and further comprising:

[0007] The first sieve bucket and the second sieve bucket are both arranged on a transverse support, and the first sieve bucket is located above the second sieve bucket. A screening mechanism is installed on the transverse support, and the screening mechanism is used to distinguish and screen Caragana korshinskii seeds of different particle sizes;

[0008] The screening mechanism is installed on the horizontal bracket and is used to adjust the angle and vibration amplitude of the screen bucket one and the screen bucket two, and adaptively adjust the pile weight of the caragana korshinskii seeds to be screened for targeted screening.

[0009] In the above-mentioned device for screening high-quality varieties of desert Caragana korshinskii, the gravity changing mechanism includes multiple spring telescopic shafts fixedly installed on both sides of the vertical bracket, and the upper ends of the multiple spring telescopic shafts on the same side are commonly fixed with a fixing seat.

[0010] In the above-mentioned device for screening high-quality varieties of desert caragana, a feed hopper is fixedly connected to the feed barrel, a stirring shaft is installed between the two fixed seats for common rotation, a plurality of blades are evenly rotated on the stirring shaft, and the stirring shaft rotates through the feed barrel to stir the seeds in the feed barrel.

[0011] In the above-mentioned device for screening high-quality varieties of desert caragana, a pulley three is fixedly installed at one end of the stirring shaft, a motor is fixedly installed on the vertical bracket, a pulley one is fixedly installed at the driving end of the motor, a tensioning wheel is installed on the vertical bracket, and a belt one is provided for rotating together between the pulley three, the pulley one and the tensioning wheel.

[0012] In the above-mentioned device for screening high-quality varieties of desert caragana, two rotating supports are fixedly installed on the horizontal bracket, a rotating rod is installed between the two rotating supports for common rotation, a second pulley is fixedly installed at one end of the rotating rod, and a second belt is provided between the second pulley and the first pulley for common rotation.

[0013] In the above-mentioned device for screening high-quality varieties of desert caragana, the screening mechanism includes a crank rotatably mounted on a rotating rod, and the crank is connected to the second screen bucket through a spring three. The spring three adapts to the movement of the first screen bucket and the second screen bucket and is elastically connected to the second screen bucket for self-adjustment.

[0014] In the above-mentioned device for screening high-quality varieties of desert caragana, angle iron 1 is fixedly installed at the four corners of the screen bucket 2, and an upper steel cover is fixedly installed on the lower surface of each angle iron 1. L-shaped steel is fixedly installed at the four corners of the transverse bracket, and a steel plate is slidably installed on each of the L-shaped steels. Sliding columns are fixedly installed on the lower surfaces of the two steel plates close to the feed barrel, and the two sliding columns are slidably installed on the transverse bracket, and angle iron 1 is also slidably installed on the corresponding L-shaped steel. A lower steel cover is fixedly installed on each of the steel plates, and a spring 1 is provided between each upper steel cover and the corresponding lower steel cover.

[0015] In the above-mentioned device for screening high-quality varieties of desert caragana, the screening mechanism includes two angle irons 2 fixedly arranged at one end of the screen bucket 2, and round steels are fixedly installed on the lower surfaces of the two angle irons 2. Sliding holes are opened on the steel plates close to the two round steels, and two sliding frames are fixedly installed on the two steel plates. Sliding rods are fixedly installed on the two round steels, and each sliding rod slides on the corresponding sliding frame. The two round steels are each installed with another round steel through spring 2, and the corresponding two round steels slide in the corresponding sliding holes.

[0016] In the above-mentioned device for screening high-quality varieties of desert caragana, two vertical rods are fixedly installed below the feed barrel, and tooth plate 2 is fixedly provided at the lower ends of the two vertical rods, and rotating shafts are rotatably installed on both sides of the vertical bracket, and gear 4 is fixedly installed at one end of the two rotating shafts close to each other, and connecting rods are fixedly installed on the two sliding columns, and tooth plate 3 is fixedly installed at one end of the two connecting rods, and gear 4 is meshed with tooth plate 2 and tooth plate 3 for use, and two connecting frames are fixedly installed on the vertical bracket, and gear 1, gear 2 and gear 3 are rotatably installed on the two connecting frames, and gear 1 is meshed with gear 2, and folding rods are fixedly installed on the two connecting rods, and tooth plate 1 is fixedly installed on the two folding rods, and tooth plate 1 is meshed with gear 3, and gear rods are fixedly installed on the lower surfaces of the two round steels below, and gear rods are meshed with gear 1.

[0017] In the above-mentioned device for screening high-quality varieties of desert caragana, a mounting plate is fixedly installed on the vertical bracket, a fan is fixedly installed on the mounting plate, the driving end of the fan is fixedly passed through the feed barrel and is located at its lower port, and a dust outlet is opened on the side of the feed barrel close to the bottom.

[0018] Compared with the existing technology, the present invention automatically adjusts the screening angle of the screen bucket according to the weight change of the pile of Caragana korshinskii seeds to be screened. When the screening weight increases, the residence time of the seeds on the screen bucket is increased, and the vibration amplitude is increased to make the seeds disperse and pass through the screen holes more quickly, avoiding seed accumulation and greatly improving the processing volume per unit time. On the contrary, when the screening weight decreases, the screening angle is appropriately increased and the vibration amplitude is reduced, which can effectively improve the screening speed. Targeted adjustment is made according to the required screening weight, avoiding the equipment from running in a high-energy consumption mode when it is unnecessary. When the weight of the seeds to be screened is small, the power consumption of the equipment can be reduced, energy is saved, and the overall screening efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a device for screening improved varieties of Caragana korshinskii proposed by the present invention;

[0020] Figure 2A structural diagram of another perspective of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the rotating shaft and the connecting rod in the present invention;

[0022] Figure 4 This is a structural diagram of the middle slide bar and spring 2 proposed by the present invention;

[0023] Figure 5 It is a structural schematic diagram of the connecting rod and the folding rod in the present invention;

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the structure of part a is enlarged;

[0025] Figure 7 It is a structural schematic diagram of the feed barrel in the present invention;

[0026] Figure 8 A top view of the feed barrel of the present invention;

[0027] Figure 9 For the present invention Figure 8 Structural cross-sectional view along the AA direction;

[0028] Figure 10 Schematic diagram of the structure of the elliptical plate and crank in the invention.

[0029] In the figure: 1. Vertical bracket; 2. Screen bucket 1; 3. Feed barrel; 4. Fixed seat; 5. Fan; 6. Rotating rod; 7. L-shaped steel; 8. Screen bucket 2; 9. Pulley 1; 10. Tensioner; 11. Pulley 2; 12. Belt 1; 13. Crank; 14. Rotating shaft; 15. Connecting rod; 16. Horizontal bracket; 17. Connecting frame; 18. Angle iron 1; 19. Upper steel cover; 20. Spring 1; 21. Lower steel cover; 22. Sliding column; 23. Round steel; 24. Sliding rod; 25. Spring 2; 26. Steel plate; 27. Angle iron 2; 28. Folding rod; 29. Gear 1; 30. Gear 2; 31. Gear 3; 32. Pulley 3; 33. Tooth plate 1; 34. Motor; 35. Spring telescopic shaft; 36. Agitation shaft; 37. Dust outlet; 38. Tooth rod; 39. Vertical rod. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1-Figure 2 as well as Figure 7-Figure 9 A device for screening high-quality varieties of desert caragana korshinskii comprises a vertical support 1 and a horizontal support 16. A feed barrel 3 is installed on the vertical support 1 through a gravity changing mechanism. A feed hopper is fixedly connected to the feed barrel 3. The feed hopper is used to add caragana korshinskii seeds into the feed barrel 3. A stirring shaft 36 is installed between the two fixed seats 4 for common rotation. Blades are rotatably arranged on the stirring shaft 36, and the blades are made of rubber to prevent damage to the surface of the seeds. The rotation of the blades generates mechanical force to break the agglomeration or agglomeration state of the seed material, disperse it into single particles or small groups, avoid adhesion of the material due to static electricity, humidity or friction between particles, ensure that each seed particle can move freely, and create conditions for subsequent screening. A pulley 3 32 is fixedly mounted on one end of the stirring shaft 36, a motor 34 is fixedly mounted on the vertical bracket 1, a pulley 1 9 is fixedly mounted on the driving end of the motor 34, and a tensioning wheel 10 is mounted on the vertical bracket 1. A belt 12 is provided for rotating together among the pulley 3 32, the pulley 1 9 and the tensioning wheel 10. The setting of the tensioning wheel 10 can be elastically adjusted when the position of the pulley 3 32 changes to prevent the belt 12 from separating from the pulley 3 32 and the pulley 1 9. When the motor 34 is turned on, the pulley 3 32 can be driven to rotate through the belt 12. The stirring shaft 36 rotates and passes through the feed barrel 3 to stir the seeds in the feed barrel 3. The gravity changing mechanism is adaptively compressed as the weight of the pile in the feed barrel 3 changes. The gravity changing mechanism includes multiple spring telescopic shafts 35 respectively fixedly installed on both sides of the vertical bracket 1. The upper ends of the multiple spring telescopic shafts 35 on the same side are all fixedly installed with a fixed seat 4. When the weight of the pile of Caragana korshinskii seeds in the feed barrel 3 gradually increases, the multiple spring telescopic shafts 35 are compressed, and the feed barrel 3 will move downward relative to the vertical bracket 1.

[0032] A mounting plate is fixedly mounted on the vertical bracket 1, and a fan 5 is fixedly mounted on the mounting plate. The fan 5 adopts a stepping motor, which realizes precise angle control by precisely controlling the current and pulse signal. By programming and controlling the sending sequence and number of pulses, the motor can be made to rotate back and forth within a range of 180 degrees. The driving end of the fan 5 is fixedly passed through the feed barrel 3 and is located at its lower end. A dust outlet 37 is provided on the side of the feed barrel 3 near the bottom. An upwardly inclined baffle is provided at the dust outlet 37, and the dust outlet 37 is not in the rotation path of the stirring shaft 36. When the stirring shaft 36 stirs the Caragana korshinskii seeds, if the seeds fall at the dust outlet 37, they will slide down into the feed barrel 3 under the action of the baffle and their own gravity; a pressure sensor is provided at the position of the two fixed seats 4, and the pressure sensor adopts a resistance strain type. This sensor is suitable for measuring weight and is relatively commonly used. The pressure sensor is then connected to an existing PLC controller. The controller converts the signal into a control signal according to a set algorithm (such as proportional control) and outputs it to the drive module of the fan 5 to drive the fan 5 to operate. When the pressure on the pressure sensor increases, the drive of the fan 5 is enhanced. When the pressure on the pressure sensor decreases, the drive of the fan 5 gradually weakens. When the weight of the pile increases, increasing the wind force can ensure that the heavy particles obtain sufficient driving force, avoid screening blockage or retention due to insufficient wind force, and increase the processing volume per unit time. When the weight of the pile decreases, reducing the wind force can prevent light materials from being excessively blown away or blown away from the dust outlet 37, ensuring that seeds of different weight grades are classified as expected and improving the screening purity. At the same time, set minimum and maximum speed limits for the fan 5 to prevent loss of control.

[0033] Two rotating supports are fixedly installed on the horizontal bracket 16, and a rotating rod 6 is installed between the two rotating supports so as to rotate together. A pulley 2 11 is fixedly installed at one end of the rotating rod 6, and a belt 2 is provided between the pulley 2 11 and the pulley 1 9 so as to rotate together. After the motor 34 is turned on, the pulley 2 11 is driven to rotate through the cooperation between the pulley 1 9 and the belt 2, and the rotation of the pulley 2 11 drives the rotating rod 6 to rotate.

[0034] Reference Figures 1-6, also includes: a sieve bucket 2 and a sieve bucket 2 8, a plurality of sieve holes are opened on the sieve bucket 2, and the particles with small particle size screened on the sieve bucket 2 will fall on the sieve bucket 2 8 for collection, both of which are arranged on a horizontal bracket 16, and the sieve bucket 12 is located above the sieve bucket 2 8, and a screening mechanism is installed on the horizontal bracket 16, and the screening mechanism is used to screen the seeds of Caragana korshinskii with different particle sizes. The screening mechanism includes a crank 13 rotatably installed on the rotating rod 6, and the crank 13 is connected to the sieve bucket 2 8 by a spring 3. The elastic force of the spring 3 is relatively large. When the angle of the sieve bucket 2 8 changes (how to change the angle of the sieve bucket 2 8 is described in the subsequent operation steps), the sieve bucket 2 is rotated. The corresponding instructions are given in detail, and the specific operation steps can be referred to in the specific operation steps section). Under the elastic force of spring three, it can adapt to the connection of crank 13 (because spring three is elastic, when the angle of sieve bucket two 8 changes, the relative position of the connection point of spring three and sieve bucket two 8 changes, and spring three can undergo elastic stretching and elastic bending to adapt to the relative position change between sieve bucket two 8 and crank 13). The spring three here can be replaced with multiple sets of universal joints. Multiple sets of universal joints can rotate freely at different angles and change their arrangement positions. They can adapt to height changes through their own adjustment while maintaining transmission accuracy. The rotation of the rotating rod 6 will drive sieve bucket one 2 and sieve bucket two 8 to shake left and right through the crank 13 (to Figure 1 As an example for reference), two elliptical plates are fixedly installed in the middle section of the crank 13, and the crank 13 is rotatably installed between the two elliptical plates. When the rotating rod 6 rotates back and forth, it will drive the two elliptical plates to reciprocate at the same time (and the most suitable angle of reciprocating rotation is 180°, to prevent the crank 13 from colliding with the rotating rod 6 when rotating, and at the same time to ensure the amplitude of the vibration screening). At this time, the crank 13 reciprocates on the outside of the rotating rod 6 with the center point of the end face of the rotating rod 6 as the center of the circle to achieve seed screening. Angle irons 18 are fixedly provided at the four corners of the screen bucket 8, and an upper steel cover 19 is fixedly installed on the lower surface of each angle iron 18. L-shaped steel plates 7 are fixedly installed at the four corners of the horizontal bracket 16. , steel plates 26 are slidably installed on the two L-shaped steels 7 near the feed barrel 3, and support grooves are opened on the two L-shaped steels 7. Support slides that slide in the support grooves are provided on the two steel plates 26. The support slides on the two steel plates 26 slide on the corresponding L-shaped steels 7 under the action of the support grooves (not illustrated in the figure due to angle problems). Slide columns 22 are fixedly installed on the lower surfaces of the two steel plates 26 near the feed barrel 3, and the two slide columns 22 are slidably set on the transverse bracket 16, and the angle iron 18 is also slidably set on the corresponding L-shaped steel 7. A lower steel cover 21 is fixedly installed on each steel plate 26, and a spring 20 is provided between each upper steel cover 19 and the corresponding lower steel cover 21.

[0035] The screening mechanism is installed on the horizontal bracket 16 and is used to adjust the angle and vibration amplitude of the screen bucket 1 2 and the screen bucket 2 8, and adaptively adjust the weight of the pile of caragana korshinskii seeds to be screened, so as to perform targeted screening. The screening mechanism includes two angle irons 27 fixedly arranged at one end of the screen bucket 2 8, and the lower surfaces of the two angle irons 27 are fixedly installed with round steels 23. Sliding holes are opened on the steel plates 26 near the two round steels 23, and two sliding holes are fixedly installed on the two steel plates 26. Frame, two round steels 23 are fixedly installed with a slide bar 24, each slide bar 24 slides on the corresponding sliding frame, two round steels 23 are installed with another round steel 23 through spring 25, and the corresponding two round steels 23 slide in the corresponding sliding holes, two vertical rods 39 are fixedly installed below the feed barrel 3, the lower ends of the two vertical rods 39 are fixedly provided with a toothed plate 2, both sides of the vertical bracket 1 are rotatably installed with a rotating shaft 14, and the ends of the two rotating shafts 14 close to each other are fixedly installed with a gear 4, and the two slide columns 22 are fixedly mounted with connecting rods 15, one end of the two connecting rods 15 are fixedly mounted with toothed plates three, and gear four is engaged with toothed plates two and three. Two connecting frames 17 are fixedly mounted on the vertical bracket 1, and gear one 29, gear two 30 and gear three 31 are rotatably mounted on the two connecting frames 17. A circular shaft is fixedly set between gear two 30 and gear three 31, and the circular shaft is rotatably set on the connecting frame 17. Gear two 30 and gear three 31 have the same diameter, but the number of teeth of gear three 31 is different. The number of teeth is more than that on gear 2 30, and gear 1 29 is meshed with gear 2 30. When gear 31 rotates, it drives gear 2 30 to rotate through the circular shaft, and the rotation of gear 2 30 drives it to rotate in the opposite direction through gear 1 29. A folding rod 28 is fixedly mounted on each of the two connecting rods 15, and a toothed plate 1 33 is fixedly mounted on each of the two folding rods 28, and the toothed plate 1 33 is meshed with gear 31. A gear rod 38 is fixedly mounted on the lower surface of the two round steels 23 below, and the gear rod 38 is meshed with gear 1 29.

[0036] When the crank 13 rotates, it drives the sieve bucket 2 8 and the sieve bucket 1 2 to shake, and at the same time, the sieve bucket 2 8 squeezes the multiple springs 1 20 and the two springs 2 25 through the multiple angle irons 18; when the weight of the pile in the feeding barrel 3 increases, it drives the two vertical rods 39 to move downward, and the two vertical rods 39 move downward through the gear 4 on the rotating shaft 14 to drive the tooth plate 3 on the connecting rod 15 to move downward. At this time, the tooth plate 3 drives the sliding column 22 to slide downward on the horizontal bracket 16 through the connecting rod 15. At this time, the angle formed by the sieve bucket 1 2 and the sieve bucket 2 8 and the horizontal ground is smaller than that of the sieve bucket 1 2. Gradually decrease (the horizontal height of the sieve bucket 1 2 and the sieve bucket 2 8 near one end of the feed barrel 3 in the device is higher than the horizontal height of the other end), to prevent the situation where a large number of Caragana korshinskii seeds are discharged without being screened due to the large screening angle (the upper layer of seeds slide to the outlet of the sieve bucket 2 without being screened). At this time, the screening angle can be self-adjusted according to the screening weight (when the weight of the seed pile is large, the screening angle becomes smaller, which can increase the time the seeds stay on the sieve bucket 2, and prevent them from sliding along the surface of the accumulated seeds under the action of gravity).

[0037] When the gear 2 is rotated, the gear 2 is rotated and the gear 2 is rotated, and the gear 2 is rotated and the gear 2 is rotated. The gear 2 is rotated and the gear 2 is rotated in the opposite direction. The gear 2 is rotated and the gear 2 is rotated in the opposite direction to drive the gear rod 38 to move downward. The distance that the gear rod 38 moves downward is greater than the distance that the sliding column 22 moves downward. The downward movement of the gear rod 38 will drive the spring 25 and the upper round steel 23 to slide downward through the lower round steel 23, and the cooperation of the sliding rod 24 and the sliding frame can prevent the round steel 23 from separating from the steel plate 26. At this time, there is a certain distance between the upper round steel 23 and the angle iron 2 27. The screen bucket 1 2 and the screen bucket 2 8 are still running at this time, but the elastic force they are subjected to downward squeezing is reduced (the elastic force of the initial spring 1 20 plus the elastic force of the spring 2 25). The sum of the forces becomes the sum of the elastic force of spring 1 20 and the elastic force of spring 2 25 above the steel plate 26. The gap between the upper round steel 23 and the angle iron 2 27 is the reduced pressure). At this time, the downward pressure is reduced, and the shaking force between the screen bucket 1 2 and the screen bucket 2 8 will also increase. The heavy seeds have great inertia, and the driving force (such as wind force, vibration force) required to start, move or penetrate the screen bucket 1 2 is greater. According to Newton's second law (F=ma), under the same acceleration, the greater the mass of the object, the greater the force required. If the screening force is insufficient, the heavy seeds may be retained due to the inability to overcome friction, gravity or the resistance of the screen bucket 1 2, resulting in low screening efficiency (such as accumulation on the surface of the screen bucket 1 2), while light seeds can be effectively moved under a smaller amplitude. Excessive amplitude may cause them to jump too high and the speed is too fast, which may cause them to get stuck or detach from the screen bucket 1 2, affecting the screening effect.

[0038] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0039] The specific operation steps of the present invention are as follows:

[0040] The seeds of Caragana korshinskii that need to be screened are added into the feed barrel 3 through the feed hopper, and the motor 34 is turned on at the same time. The motor 34 starts and drives the stirring shaft 36 to stir the seeds in the feed barrel 3 through the belt 12 to prevent the large amount of added seeds from causing excessive static friction and resulting in material blockage. When the seed stacking weight in the feed barrel 3 changes, the feed barrel 3 will then move up and down relative to each other. When the seed stacking weight increases, it moves downward, and when the seed stacking weight decreases, it moves upward. At this time, the pressure sensor will sense it, transmit the received signal and control the wind force of the blower 5 to screen the seeds that need to be screened for impurities;

[0041] When the motor 34 is turned on, it will drive the rotating rod 6 to rotate through the belt 2. The rotation of the rotating rod 6 drives the crank 13 to do a reciprocating semi-circular motion around the axis of the rotating rod 6. When the crank 13 rotates, it will drive the screen bucket 2 8 and the screen bucket 1 2 to shake. When the weight of the accumulated seeds that need to be screened in the feed barrel 3 increases, it will drive the two vertical rods 39 to move downward. The two vertical rods 39 move downward and drive the gear four on the rotating shaft 14 to drive the tooth plate three on the connecting rod 15 to move downward. At this time, the tooth plate three drives the sliding column 22 to slide downward on the horizontal bracket 16 through the connecting rod 15. At this time, the angle formed by the screen bucket 1 2 and the screen bucket 2 8 with the horizontal ground gradually decreases, preventing the accumulated upper layer of seeds from sliding to the outlet of the screen bucket 2 without being screened. At this time, the angle of the screen bucket 1 2 can be self-adjusted according to the weight of the screened seeds.

[0042] While adjusting the screening angle, the connecting rod 15 moves downward, which will drive the folding rod 28 fixed thereto to move downward together. At this time, the gear plate 1 33 drives the gear 3 31 to rotate, and the rotation of the gear 3 31 drives the gear 2 30 to rotate through the circular shaft. The rotation of the gear 2 30 drives the gear 1 29 to rotate in the opposite direction. The reverse rotation of the gear 1 29 drives the gear rod 38 to move downward. The downward movement of the gear rod 38 will drive the spring 2 25 and the round steel 23 above to slide downward through the round steel 23 below, and the cooperation of the slide bar 24 and the sliding frame can prevent the round steel 23 from releasing from the steel plate 26. The seeds are separated from each other, and there is a certain distance between the round steel 23 above and the angle iron 27. The sieve bucket 1 2 and the sieve bucket 2 8 are still running. The pressure during the downward screening vibration is reduced, but the driving force remains unchanged. The shaking force between the sieve bucket 1 2 and the sieve bucket 2 8 increases accordingly. The larger the mass of the object, the greater the force required. If the screening force is insufficient, the heavy seeds may be retained due to the inability to overcome the friction, gravity or resistance of the sieve bucket 1 2, resulting in low screening efficiency. Light seeds can be effectively moved under a smaller amplitude. Too large an amplitude may cause them to jump too high and too fast.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for screening improved varieties of Caragana korshinskii, comprising a vertical support (1) and a horizontal support (16), characterized in that: The vertical support (1) is provided with a feed barrel (3) via a gravity changing mechanism, and the gravity changing mechanism performs adaptive compression as the weight of the piled material in the feed barrel (3) changes, and further comprises: The first sieve bucket (2) and the second sieve bucket (8) are both arranged on a transverse support (16), and the first sieve bucket (2) is located above the second sieve bucket (8). A screening mechanism is installed on the transverse support (16), and the screening mechanism is used to distinguish and screen Caragana korshinskii seeds of different particle sizes; A screening mechanism is mounted on a transverse support (16) and is used to adjust the angle and vibration amplitude of the first screening bucket (2) and the second screening bucket (8), and to perform adaptive adjustment according to the weight of the pile of Caragana korshinskii seeds to be screened, so as to perform targeted screening; The gravity changing mechanism comprises a plurality of spring telescopic shafts (35) respectively fixedly mounted on both sides of the vertical bracket (1), and the upper ends of the plurality of spring telescopic shafts (35) on the same side are all fixedly mounted with a fixing seat (4); Angle irons (18) are fixedly installed at the four corners of the screen bucket (8), and an upper steel cover (19) is fixedly installed on the lower surface of each angle iron (18). L-shaped steels (7) are fixedly installed at the four corners of the transverse bracket (16), and a steel plate (26) is slidably installed on each of the L-shaped steels (7). Slide columns (22) are fixedly installed on the lower surfaces of the two steel plates (26) close to the feed barrel (3), and the two slide columns (22) are slidably installed on the transverse bracket (16), and angle irons (18) are also slidably installed on the corresponding L-shaped steels (7). A lower steel cover (21) is fixedly installed on each of the steel plates (26), and a spring (20) is provided between each upper steel cover (19) and the corresponding lower steel cover (21); The screening mechanism comprises two angle irons (27) fixedly arranged at one end of the screen bucket (8), the lower surfaces of the two angle irons (27) are fixedly mounted with round steels (23), and sliding holes are provided on the steel plates (26) close to the two round steels (23), two sliding frames are fixedly mounted on the two steel plates (26), and the two round steels (23) are fixedly mounted with sliding rods (24), each of the sliding rods (24) slides on the corresponding sliding frame, and the two round steels (23) are mounted with another round steel (23) through springs (25), and the corresponding two round steels (23) slide in the corresponding sliding holes; Two vertical rods (39) are fixedly installed below the feeding barrel (3), and tooth plates 2 are fixedly installed at the lower ends of the two vertical rods (39). Rotating shafts (14) are rotatably installed on both sides of the vertical bracket (1), and gears 4 are fixedly installed at the ends of the two rotating shafts (14) close to each other. Connecting rods (15) are fixedly installed on the two sliding columns (22), and tooth plates 3 are fixedly installed at one end of the two connecting rods (15). Gears 4 are meshed with tooth plates 2 and 3 for use. Two connecting rods are fixedly installed on the vertical bracket (1). (17), gear one (29), gear two (30) and gear three (31) are rotatably mounted on the two connecting frames (17), and gear one (29) is meshed with gear two (30), folding rods (28) are fixedly mounted on the two connecting rods (15), toothed plates (33) are fixedly mounted on the two folding rods (28), and toothed plates (33) are meshed with gear three (31), and toothed rods (38) are fixedly mounted on the lower surfaces of the two round steels (23) below, and the toothed rods (38) are meshed with gear one (29).

2. The device for screening improved varieties of Caragana korshinskii according to claim 1, characterized in that: The feed barrel (3) is fixedly connected to a feed hopper, and a stirring shaft (36) is installed between the two fixed seats (4) for common rotation. A plurality of blades are evenly rotated on the stirring shaft (36), and the stirring shaft (36) rotates through the feed barrel (3) to stir the seeds in the feed barrel (3).

3. A screening device for improved varieties of Caragana korshinskii according to claim 2, characterized in that: A pulley three (32) is fixedly mounted on one end of the stirring shaft (36), a motor (34) is fixedly mounted on the vertical bracket (1), a pulley one (9) is fixedly mounted on the driving end of the motor (34), a tensioning wheel (10) is mounted on the vertical bracket (1), and a belt one (12) is provided for rotating together between the pulley three (32), the pulley one (9) and the tensioning wheel (10).

4. The device for screening improved varieties of Caragana korshinskii according to claim 3, characterized in that: Two rotating supports are fixedly mounted on the transverse bracket (16), a rotating rod (6) is mounted between the two rotating supports for common rotation, a second pulley (11) is fixedly mounted on one end of the rotating rod (6), and a second belt is mounted between the second pulley (11) and the first pulley (9) for common rotation.

5. The device for screening improved varieties of Caragana korshinskii according to claim 4, characterized in that: The screening mechanism comprises a crank (13) rotatably mounted on a rotating rod (6), wherein the crank (13) is connected to the second sieve bucket (8) via a spring (3), and when the first sieve bucket (2) and the second sieve bucket (8) are in an adjustment position, the spring (3) adapts to the movement of the first sieve bucket (2) and the second sieve bucket (8) and forms a self-adjusting elastic connection with the second sieve bucket (8).

6. The device for screening improved varieties of Caragana korshinskii according to claim 1, characterized in that: A mounting plate is fixedly mounted on the vertical bracket (1), and a fan (5) is fixedly mounted on the mounting plate. The driving end of the fan (5) is fixedly passed through the feed barrel (3) and is located at its lower end. A dust outlet (37) is provided on one side of the feed barrel (3) close to the bottom.

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