A device and method for selecting improved grass seeds for degraded grassland

Abstract

The present invention relates to the technical field of grass seed screening, and specifically to a device for selecting and breeding improved varieties of grass seeds for degraded pastures and a screening method, comprising a support frame and a lower hopper installed at the upper end of the support frame, a screening pipe is fixedly connected to the front end of the lower hopper, the screening pipe is inclined downward, a filter is installed at the lower end of the screening pipe, a shifting mechanism for assisting the filter to screen grass seeds is arranged on the outer side of the screening pipe, a cleaning mechanism for cleaning dust in the grass seeds is arranged on the upper end of the screening pipe, a first material receiving frame and a second material receiving frame are fixedly connected to the inner side of the support frame, a support column is fixedly connected to the upper end of the second material receiving frame, and the support column is fixedly connected to the screening pipe. The present invention can improve the screening efficiency of grass seeds and ensure the quality of the screened grass seeds.

Description

Technical Field

[0001] The invention relates to the technical field of grass seed screening, and in particular to a device for selecting and breeding improved varieties of grass seeds for degraded pastures and a screening method. Background Art

[0002] Grassland degradation is a global environmental problem, which involves the deterioration of grassland ecosystem structure and functional processes, including the degradation of biological communities and their living environment. The causes of grassland degradation can be divided into natural factors and human factors. In the Qinghai-Tibet Plateau, grassland degradation is particularly serious, which is closely related to climate change and the impact of human activities. Restoration measures include returning pasture to grassland, intercropping trees and grasses, and artificial grass planting. Artificial grass planting requires ensuring the quality of grass seeds and requires screening of grass seeds in advance. The existing screening device will screen a large number of seeds at one time during the seed selection process, resulting in insufficient screening of grass seeds and the dust on the grass seeds is difficult to clean. For this reason, we propose a seed selection device and screening method for degraded grassland grass seeds. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a breeding device and screening method for improved grass seeds in degraded pastures.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a device for selecting and breeding improved varieties of grass seeds for degraded pastures, comprising a support frame and a lower hopper installed at the upper end of the support frame, a sieve pipe is fixedly connected to the front end of the lower hopper, the sieve pipe is inclined downward, a filter is installed at the lower end of the sieve pipe, a shifting mechanism for assisting the filter to sieve grass seeds is arranged on the outer side of the sieve pipe, a cleaning mechanism for cleaning dust in the grass seeds is arranged on the upper end of the sieve pipe, a first material receiving frame and a second material receiving frame are fixedly connected to the inner side of the support frame, a support column is fixedly connected to the upper end of the second material receiving frame, and the support column is fixedly connected to the sieve pipe.

[0005] Preferably, the screen pipe passes through the lower hopper and extends out of the rear end of the lower hopper, the rear end of the lower hopper is fixedly connected to a second mounting plate, the inner side of the second mounting plate is fixedly connected to a driving motor, the output shaft of the driving motor is fixedly connected to a second connecting shaft, the second connecting shaft is rotatably connected to the inner side of the screen pipe, the outer side of the second connecting shaft is provided with spiral blades, the upper end of the screen pipe is provided with a discharge port, the discharge port is located on the inner side of the lower hopper, and the inner side of the lower hopper is fixedly connected to an inclined plate.

[0006] Preferably, the toggle mechanism includes two sets of ring rails fixedly connected to the outside of the screen tube, the two sets of ring rails are respectively located at the front and rear ends of the filter screen, the outer sides of the ring rails are rotatably connected with gear rings, the two sets of gear rings are fixedly connected with connecting plates on opposite sides, the connecting plates are L-shaped, a scraper is fixedly connected between the two sets of connecting plates, the scraper is in contact with the filter screen, and a striking component for striking the scraper is provided on the inner side of the connecting plate.

[0007] Preferably, an annular groove is provided on the outer side of the annular rail, and two groups of sliders are slidably connected to the inner side of the annular groove, and the slider is T-shaped and fixedly connected to the gear ring. Two groups of mounting blocks are fixedly connected to the inner side of the annular groove, and a spring is fixedly connected to one side of the mounting block, and the other end of the spring is fixedly connected to the slider.

[0008] Preferably, two groups of fixed blocks are fixedly connected to the lower end of the lower hopper, and a transmission shaft is connected between the two groups of fixed blocks for common rotation. The rear end of the transmission shaft is fixedly connected to a second gear, and the other end of the transmission shaft is fixedly connected to a half gear, and the half gear is meshed with a ring gear. A first gear is provided on the outer side of the second connecting shaft, and the first gear is located behind the screen pipe, and the first gear is meshed with the second gear.

[0009] Preferably, the striking assembly includes a rotating rod rotatably connected to the inner side of the connecting plate, one end of the rotating rod is fixedly connected to a vertical shaft, the upper end of the vertical shaft is rotatably connected to a rolling ball, the other end of the rotating rod is fixedly connected to a striking block, the two sets of ring rails are fixedly connected to opposite sides with convex rings, the outer side of the convex ring is fixedly connected with a protrusion, and the lower end of the protrusion is arc-shaped.

[0010] Preferably, two groups of fixed cylinders are fixedly connected to the inner side of the connecting plate, the inner side of the fixed cylinder is rotatably connected to a first connecting shaft, the first connecting shaft is fixedly connected to the rotating rod, a spring sheet is arranged on the outer side of the first connecting shaft, and the spring sheet is located on the inner side of the fixed cylinder.

[0011] Preferably, the cleaning mechanism includes a connecting shell fixedly connected to the upper end of the screen pipe, an opening is provided on the outer side of the screen pipe, the opening is located at the lower end of the connecting shell, the rear end of the connecting shell is fixedly connected to a first mounting plate, the upper end of the first mounting plate is fixedly connected to a fan, the front end of the fan is fixedly connected to a through pipe, the outer side of the through pipe is fixedly connected to two groups of inclined pipes, the inclined pipes extend to the inner side of the connecting shell, the front end of the connecting shell is fixedly connected to an ash discharge pipe, the ash discharge pipe is L-shaped, and an arc sheet is provided on the inner side of the ash discharge pipe.

[0012] A method for screening improved grass seeds in degraded pastures, comprising:

[0013] Step 1: Add grass seeds to the inner side of the lower hopper, start the drive motor to drive the second connecting shaft to rotate, use the spiral blades to push the grass seeds inside the screening tube forward, the grass seeds will fall into the inner side of the screening tube through the lower feeding port, the grass seeds will roll forward, and will be filtered through the filter net to make the smaller grass seeds be screened to the inner side of the first receiving frame, and the grass seeds with better quality will fall to the inner side of the second receiving frame;

[0014] Step 2: The rotation of the second connecting shaft drives the second gear to rotate through the first gear, and drives the half gear to rotate through the transmission shaft, thereby driving the ring gear to rotate on the outside of the ring rail, so that the connection plate drives the scraper to scrape the outside of the filter screen. The rotation of the ring gear drives the slider to rotate and drives the spring to open. When the half gear is separated from the ring gear, the spring will contract and drive the ring gear to rotate, so that the scraper can scrape the filter screen back and forth;

[0015] Step 3: The rotation of the connecting plate will drive the rotating rod to move, drive the vertical axis to move on the outside of the protrusion, and then drive the rotating rod to rotate on the inside of the connecting plate, so that the impact block hits the scraper to vibrate the filter, thereby improving the screening efficiency of the filter;

[0016] Step 4: Start the fan to blow air to the through pipe, thereby blowing air to the inside of the screen pipe through the inclined pipe to blow up the dust in the grass seeds. The wind will carry the dust through the arc sheet and be discharged from the outlet of the ash discharge pipe.

[0017] Compared with the prior art, the present invention provides a device and method for selecting improved varieties of grass seeds for degraded pastures, which has the following beneficial effects:

[0018] 1. A device and method for selecting and breeding improved varieties of grass seeds for degraded pastures. A driving motor can drive the second connecting shaft to rotate, and a spiral blade is used to push the grass seeds on the inner side of the screening tube forward. The spiral blades push the grass seeds forward and cause the grass seeds to roll, making it convenient for the filter to screen the grass seeds, so that the grass seeds with better quality fall to the inner side of the second receiving frame, thereby improving the screening efficiency of the grass seeds and ensuring the quality of the screened grass seeds.

[0019] 2. A device and method for selecting improved varieties of grass species in degraded grasslands, wherein the first gear can drive the second gear to rotate, and the transmission shaft can drive the half gear to rotate, thereby driving the gear ring to rotate on the outside of the ring rail, so as to use the connecting plate to drive the scraper to scrape the outside of the filter screen to prevent the screening holes on the filter screen from being blocked. The rotation of the gear ring will drive the slider to rotate and drive the spring to open. When the half gear is separated from the gear ring, the spring will contract and drive the gear ring to rotate, so as to realize the back and forth scraping of the filter screen by the scraper. The rotation of the connecting plate will drive the rotating rod to move, and drive the vertical axis to move on the outside of the protrusion, thereby driving the rotating rod to rotate on the inside of the connecting plate, so as to use the striking block to hit the scraper to vibrate the filter screen, thereby further improving the screening efficiency of the filter screen. The first connecting shaft can be driven to rotate by the spring, so that the rotating rod can drive the striking block to hit the scraper.

[0020] 3. The device and method for selecting improved grass seeds for degraded pastures can blow air into the through pipe through a fan, thereby blowing air to the inner side of the screening pipe through an inclined pipe to blow up dust in the grass seeds, and the air can be discharged from the outlet of the ash outlet pipe through arc pieces, thereby facilitating dust cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a cross-sectional view of the present invention;

[0023] Figure 3 It is a schematic diagram of the partial structure of the present invention Figure 1 ;

[0024] Figure 4 It is a schematic diagram of the partial structure of the present invention Figure 2 ;

[0025] Figure 5 The present invention is a cross-sectional view of the toggle mechanism Figure 1 ;

[0026] Figure 6 The present invention is a cross-sectional view of the toggle mechanism Figure 2 ;

[0027] Figure 7 The structure diagram of the toggle mechanism of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 8 The structure diagram of the toggle mechanism of the present invention is shown in FIG. Figure 2 ;

[0029] Fig. 9 The structure diagram of the toggle mechanism of the present invention is shown in FIG. Figure 3 ;

[0030] Fig.10It is a cross-sectional view of the striking assembly of the present invention;

[0031] Fig.11 It is a cross-sectional view of the cleaning mechanism of the present invention.

[0032] In the figure: 1, support frame; 2, lower hopper; 3, screening tube; 4, filter screen; 5, toggle mechanism; 51, ring rail; 52, connecting plate; 53, scraper; 54, gear ring; 55, ring groove; 56, slider; 57, spring; 58, mounting block; 59, striking assembly; 591, rotating rod; 592, vertical shaft; 593, rolling ball; 594, striking block; 595, fixed cylinder; 596, first connecting shaft; 597, spring; 598, convex ring; 599, convex block; 510, first A gear; 511, a fixed block; 512, a transmission shaft; 513, a second gear; 514, a half gear; 6, a cleaning mechanism; 61, a connecting shell; 62, a first mounting plate; 63, a fan; 64, a through pipe; 65, an inclined pipe; 66, an ash outlet pipe; 67, an opening; 68, an arc piece; 7, a first material receiving frame; 8, a second material receiving frame; 9, a support column; 10, a second mounting plate; 11, a driving motor; 12, a second connecting shaft; 13, a discharge port; 14, a spiral blade; 15, an inclined plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] See also Figure 1 - Fig.11 A device for selecting and breeding improved varieties of grass seeds for degraded pastures comprises a support frame 1 and a lower hopper 2 installed at the upper end of the support frame 1, a screening tube 3 is fixedly connected to the front end of the lower hopper 2, the screening tube 3 is inclined downward, a filter screen 4 is installed at the lower end of the screening tube 3, a toggle mechanism 5 for assisting the filter screen 4 in screening grass seeds is arranged on the outer side of the screening tube 3, a cleaning mechanism 6 for cleaning dust in the grass seeds is arranged on the upper end of the screening tube 3, a first material receiving frame 7 and a second material receiving frame 8 are fixedly connected to the inner side of the support frame 1, a support column 9 is fixedly connected to the upper end of the second material receiving frame 8, and the support column 9 is fixedly connected to the screening tube 3.

[0035] In this embodiment, the screening tube 3 passes through the lower hopper 2 and extends out of the rear end of the lower hopper 2. The rear end of the lower hopper 2 is fixedly connected to a second mounting plate 10. The inner side of the second mounting plate 10 is fixedly connected to a driving motor 11. The output shaft of the driving motor 11 is fixedly connected to a second connecting shaft 12. The second connecting shaft 12 is rotatably connected to the inner side of the screening tube 3. A spiral blade 14 is arranged on the outer side of the second connecting shaft 12. A discharge port 13 is opened at the upper end of the screening tube 3. The discharge port 13 is located on the inner side of the lower hopper 2. The inner side of the lower hopper 2 is fixedly connected to an inclined plate 15.

[0036] Specifically, the second connecting shaft 12 can be driven to rotate by the driving motor 11, and the spiral blades 14 are used to push the grass seeds inside the screening tube 3 forward. In the process of pushing the grass seeds forward, the spiral blades 14 will cause the grass seeds to roll, which makes it convenient for the filter net 4 to screen the grass seeds and make the grass seeds with better quality fall to the inside of the second receiving frame 8.

[0037] In this embodiment, the toggle mechanism 5 includes two sets of ring rails 51 fixedly connected to the outside of the screening tube 3, the two sets of ring rails 51 are respectively located at the front and rear ends of the filter screen 4, the outer side of the ring rails 51 is rotatably connected with a gear ring 54, and the two sets of gear rings 54 are fixedly connected to the opposite sides with connecting plates 52, the connecting plate 52 is L-shaped, and a scraper 53 is fixedly connected between the two sets of connecting plates 52, the scraper 53 is in contact with the filter screen 4, and a striking component 59 for striking the scraper 53 is provided on the inner side of the connecting plate 52.

[0038] Specifically, the gear ring 54 rotates on the outer side of the ring rail 51, which can drive the connecting plate 52 to rotate, and then use the scraper 53 to scrape the outer side of the filter screen 4 to prevent the filter screen 4 from being blocked.

[0039] In this embodiment, an annular groove 55 is provided on the outer side of the annular rail 51, and two groups of sliders 56 are slidably connected to the inner side of the annular groove 55. The slider 56 is T-shaped and fixedly connected to the gear ring 54. Two groups of mounting blocks 58 are fixedly connected to the inner side of the annular groove 55, and a spring 57 is fixedly connected to one side of the mounting block 58, and the other end of the spring 57 is fixedly connected to the slider 56.

[0040] Specifically, the rotation of the gear ring 54 can drive the slider 56 to slide inside the annular groove 55, drive the spring 57 to open, and the spring 57 can drive the gear ring 54 to rotate, so that the scraper 53 can scrape the filter screen 4 back and forth.

[0041] In this embodiment, two groups of fixed blocks 511 are fixedly connected to the lower end of the lower hopper 2, and a transmission shaft 512 is connected between the two groups of fixed blocks 511 for common rotation. The rear end of the transmission shaft 512 is fixedly connected to a second gear 513, and the other end of the transmission shaft 512 is fixedly connected to a half gear 514, and the half gear 514 is meshed with the ring gear 54. A first gear 510 is arranged on the outer side of the second connecting shaft 12, and the first gear 510 is located behind the screening tube 3, and the first gear 510 is meshed with the second gear 513.

[0042] Specifically, the first gear 510 can drive the second gear 513 to rotate, and the transmission shaft 512 can drive the half gear 514 to rotate, thereby driving the ring gear 54 to rotate on the outside of the ring rail 51, so that the connecting plate 52 drives the scraper 53 to scrape the outside of the filter screen 4.

[0043] In this embodiment, the striking assembly 59 includes a rotating rod 591 rotatably connected to the inner side of the connecting plate 52, one end of the rotating rod 591 is fixedly connected to a vertical shaft 592, the upper end of the vertical shaft 592 is rotatably connected to a rolling ball 593, the other end of the rotating rod 591 is fixedly connected to a striking block 594, and the two sets of ring rails 51 are fixedly connected to the opposite sides with convex rings 598, and the outer side of the convex ring 598 is fixedly connected with a protrusion 599, and the lower end of the protrusion 599 is arc-shaped.

[0044] Specifically, the connecting plate 52 can drive the rotating rod 591 to move, so that the ball 593 rolls on the protrusion 599. The protrusion 599 can make the rotating rod 591 rotate on the inner side of the connecting plate 52, so that the striking block 594 strikes the scraper 53 to vibrate the filter screen 4, thereby improving the screening efficiency of the filter screen 4.

[0045] In this embodiment, two groups of fixed cylinders 595 are fixedly connected to the inner side of the connecting plate 52, and the inner side of the fixed cylinder 595 is rotatably connected to the first connecting shaft 596, which is fixedly connected to the rotating rod 591. A spring piece 597 is arranged on the outer side of the first connecting shaft 596, and the spring piece 597 is located on the inner side of the fixed cylinder 595.

[0046] Specifically, the spring piece 597 can drive the first connecting shaft 596 to rotate, so that the rotating rod 591 can drive the striking block 594 to strike the scraper 53.

[0047] In this embodiment, the cleaning mechanism 6 includes a connecting shell 61 fixedly connected to the upper end of the screen tube 3, an opening 67 is opened on the outer side of the screen tube 3, and the opening 67 is located at the lower end of the connecting shell 61. The rear end of the connecting shell 61 is fixedly connected to a first mounting plate 62, and the upper end of the first mounting plate 62 is fixedly connected to a fan 63. The front end of the fan 63 is fixedly connected to a through pipe 64, and the outer side of the through pipe 64 is fixedly connected to two groups of inclined pipes 65, which extend to the inner side of the connecting shell 61. The front end of the connecting shell 61 is fixedly connected to an ash outlet pipe 66, which is L-shaped, and an arc sheet 68 is arranged on the inner side of the ash outlet pipe 66.

[0048] Specifically, the fan 63 can blow air to the through pipe 64, thereby blowing air to the inner side of the screening pipe 3 through the inclined pipe 65 to blow up the dust in the grass seeds, and the arc piece 68 can facilitate the discharge of wind from the outlet of the ash outlet pipe 66 to facilitate the cleaning of dust.

[0049] A method for screening improved grass seeds in degraded pastures, comprising:

[0050] Step 1: Add grass seeds to the inner side of the lower hopper 2, start the drive motor 11 to drive the second connecting shaft 12 to rotate, use the spiral blades 14 to push the grass seeds inside the screening tube 3 forward, the grass seeds will pass through the lower opening 13 and fall to the inner side of the screening tube 3, the grass seeds will roll forward, and will be filtered by the filter 4 so that the smaller grass seeds are screened to the inner side of the first receiving frame 7, and the grass seeds with better quality fall to the inner side of the second receiving frame 8;

[0051] Step 2: The rotation of the second connecting shaft 12 drives the second gear 513 to rotate through the first gear 510, and drives the half gear 514 to rotate through the transmission shaft 512, thereby driving the ring gear 54 to rotate on the outer side of the ring rail 51, so that the connection plate 52 drives the scraper 53 to scrape the outer side of the filter screen 4, and the rotation of the ring gear 54 drives the slider 56 to rotate and drives the spring 57 to open. When the half gear 514 is separated from the ring gear 54, the spring 57 will contract and drive the ring gear 54 to rotate, so that the scraper 53 can scrape the filter screen 4 back and forth;

[0052] Step 3: The rotation of the connecting plate 52 drives the rotating rod 591 to move, and drives the vertical shaft 592 to move outside the protrusion 599, thereby driving the rotating rod 591 to rotate inside the connecting plate 52, so that the striking block 594 strikes the scraper 53 to vibrate the filter screen 4, thereby improving the screening efficiency of the filter screen 4;

[0053] Step 4: Start the fan 63 to blow air to the through pipe 64, thereby blowing air to the inner side of the screening pipe 3 through the inclined pipe 65 to blow up the dust in the grass seeds. The wind will carry the dust through the arc piece 68 and be discharged from the outlet of the ash discharge pipe 66.

[0054] It should be noted that, when in use, the driving motor 11 is used to drive the second connecting shaft 12 to rotate, and the spiral blades 14 are used to push the grass seeds on the inner side of the screening tube 3 forward. The grass seeds will fall into the inner side of the screening tube 3 through the discharge port 13, and the grass seeds will roll forward and be filtered through the filter 4 to screen the smaller grass seeds to the inner side of the first receiving frame 7, and the grass seeds with better quality will fall into the inner side of the second receiving frame 8. The rotation of the second connecting shaft 12 will drive the second gear 513 to rotate through the first gear 510, and drive the half gear 514 to rotate through the transmission shaft 512, thereby driving the ring gear 54 to rotate on the outer side of the ring rail 51, so that the connection plate 52 drives the scraper 53 to scrape the outer side of the filter 4, and the rotation of the ring gear 54 will drive the slider 56 to rotate, and drive the spring 57 Open, when the half gear 514 is separated from the ring gear 54, the spring 57 will contract, driving the ring gear 54 to rotate, so that the scraper 53 can scrape the filter screen 4 back and forth. The rotation of the connecting plate 52 will drive the rotating rod 591 to move, and drive the vertical shaft 592 to move on the outside of the protrusion 599, thereby driving the rotating rod 591 to rotate on the inside of the connecting plate 52, so that the scraper 53 is hit by the striking block 594 to make the filter screen 4 vibrate, and the first connecting shaft 596 can be driven to rotate through the spring piece 597, which is convenient for the rotating rod 591 to drive the striking block 594 to hit the scraper 53, thereby improving the screening efficiency of the filter screen 4, and starting the fan 63 to blow air to the through pipe 64, thereby blowing air to the inside of the screening pipe 3 through the inclined pipe 65, and the dust in the forage seeds will be carried by the wind through the arc piece 68 and discharged from the outlet of the ash outlet pipe 66.

[0055] 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 device for selecting and breeding improved grass seeds for degraded grasslands, comprising a support frame (1) and a lower hopper (2) mounted on the upper end of the support frame (1), characterized in that: A sieve pipe (3) is fixedly connected to the front end of the lower hopper (2), the sieve pipe (3) is tilted downward, a filter screen (4) is installed at the lower end of the sieve pipe (3), a toggle mechanism (5) for assisting the filter screen (4) in sieving grass seeds is arranged on the outer side of the sieve pipe (3), a cleaning mechanism (6) for cleaning dust in the grass seeds is arranged on the upper end of the sieve pipe (3), a first material receiving frame (7) and a second material receiving frame (8) are fixedly connected to the inner side of the support frame (1), a support column (9) is fixedly connected to the upper end of the second material receiving frame (8), and the support column (9) is fixedly connected to the sieve pipe (3). The toggle mechanism (5) comprises two groups of ring rails (51) fixedly connected to the outside of the screening tube (3), the two groups of ring rails (51) being respectively located at the front and rear ends of the filter screen (4), the outer sides of the ring rails (51) being rotatably connected to a gear ring (54), the two groups of gear rings (54) being fixedly connected to connecting plates (52) on opposite sides, the connecting plates (52) being L-shaped, a scraper (53) being fixedly connected between the two groups of connecting plates (52), the scraper (53) being in contact with the filter screen (4), and a striking component (59) for striking the scraper (53) being provided on the inner side of the connecting plate (52). The striking assembly (59) comprises a rotating rod (591) rotatably connected to the inner side of the connecting plate (52); one end of the rotating rod (591) is fixedly connected to a vertical shaft (592); the upper end of the vertical shaft (592) is rotatably connected to a rolling ball (593); the other end of the rotating rod (591) is fixedly connected to a striking block (594); the two sets of ring rails (51) are fixedly connected to opposite sides with convex rings (598); the outer side of the convex ring (598) is fixedly connected to a convex block (599); the lower end of the convex block (599) is arc-shaped; the inner side of the connecting plate (52) is fixedly connected to two sets of fixed cylinders (594); 5), the inner side of the fixed cylinder (595) is rotatably connected to a first connecting shaft (596), the first connecting shaft (596) is fixedly connected to the rotating rod (591), and a spring sheet (597) is arranged on the outer side of the first connecting shaft (596), and the spring sheet (597) is located on the inner side of the fixed cylinder (595). The rotation of the connecting plate (52) drives the rotating rod (591) to move, and drives the vertical shaft (592) to move on the outer side of the protrusion (599), thereby driving the rotating rod (591) to rotate on the inner side of the connecting plate (52), so that the scraper (53) is hit by the hitting block (594), thereby causing the filter screen (4) to vibrate.

2. The device for selecting and breeding improved grass seeds for degraded pastures according to claim 1, characterized in that: The sieve pipe (3) passes through the lower hopper (2) and extends out of the rear end of the lower hopper (2); the rear end of the lower hopper (2) is fixedly connected to a second mounting plate (10); the inner side of the second mounting plate (10) is fixedly connected to a driving motor (11); the output shaft of the driving motor (11) is fixedly connected to a second connecting shaft (12); the second connecting shaft (12) is rotatably connected to the inner side of the sieve pipe (3); the outer side of the second connecting shaft (12) is provided with a spiral blade (14); the upper end of the sieve pipe (3) is provided with a discharge port (13); the discharge port (13) is located on the inner side of the lower hopper (2); the inner side of the lower hopper (2) is fixedly connected to an inclined plate (15).

3. The device for selecting and breeding improved grass seeds for degraded pastures according to claim 2, characterized in that: An annular groove (55) is formed on the outer side of the annular rail (51), and two groups of sliding blocks (56) are slidably connected to the inner side of the annular groove (55), and the sliding blocks (56) are T-shaped and fixedly connected to the gear ring (54). Two groups of mounting blocks (58) are fixedly connected to the inner side of the annular groove (55), and a spring (57) is fixedly connected to one side of the mounting block (58), and the other end of the spring (57) is fixedly connected to the sliding block (56).

4. The device for selecting and breeding improved grass seeds for degraded pastures according to claim 3, characterized in that: Two groups of fixed blocks (511) are fixedly connected to the lower end of the lower hopper (2); a transmission shaft (512) is rotatably connected between the two groups of fixed blocks (511); a second gear (513) is fixedly connected to the rear end of the transmission shaft (512); a half gear (514) is fixedly connected to the other end of the transmission shaft (512); the half gear (514) is meshed with a gear ring (54); a first gear (510) is arranged on the outer side of the second connecting shaft (12); the first gear (510) is located behind the screening tube (3); and the first gear (510) is meshed with the second gear (513).

5. The device for selecting and breeding improved grass seeds for degraded pastures according to claim 4, characterized in that: The cleaning mechanism (6) comprises a connecting shell (61) fixedly connected to the upper end of the sieve tube (3); an opening (67) is provided on the outer side of the sieve tube (3); the opening (67) is located at the lower end of the connecting shell (61); a first mounting plate (62) is fixedly connected to the rear end of the connecting shell (61); a fan (63) is fixedly connected to the upper end of the first mounting plate (62); a through pipe (64) is fixedly connected to the front end of the fan (63); two groups of inclined pipes (65) are fixedly connected to the outer side of the through pipe (64); the inclined pipes (65) extend to the inner side of the connecting shell (61); a ash discharge pipe (66) is fixedly connected to the front end of the connecting shell (61); the ash discharge pipe (66) is L-shaped; an arc sheet (68) is provided on the inner side of the ash discharge pipe (66).

6. A method for screening improved varieties of grass seeds in degraded pastures, applied to the improved variety selection device for degraded pastures as claimed in claim 5, characterized in that: include: Step 1: Add grass seeds to the inner side of the feed hopper (2), start the drive motor (11) to drive the second connecting shaft (12) to rotate, and use the spiral blade (14) to push the grass seeds inside the screening tube (3) forward. The grass seeds will pass through the feed outlet (13) and fall to the inner side of the screening tube (3). The grass seeds will roll forward and be filtered through the filter screen (4) so ​​that the smaller grass seeds are screened to the inner side of the first receiving frame (7), and the grass seeds with better quality fall to the inner side of the second receiving frame (8); Step 2: The rotation of the second connecting shaft (12) drives the second gear (513) to rotate via the first gear (510), and drives the half gear (514) to rotate via the transmission shaft (512), thereby driving the ring gear (54) to rotate on the outer side of the ring rail (51), thereby driving the scraper (53) to scrape the outer side of the filter screen (4) using the connecting plate (52). The rotation of the ring gear (54) drives the slider (56) to rotate and drives the spring (57) to open. When the half gear (514) and the ring gear (54) are separated, the spring (57) contracts and drives the ring gear (54) to rotate, thereby realizing the scraper (53) scraping the filter screen (4) back and forth; Step 3: The rotation of the connecting plate (52) drives the rotating rod (591) to move, driving the vertical shaft (592) to move outside the protrusion (599), thereby driving the rotating rod (591) to rotate inside the connecting plate (52), thereby using the striking block (594) to strike the scraper (53) to vibrate the filter screen (4), thereby improving the screening efficiency of the filter screen (4); Step 4: Start the fan (63) to blow air to the through pipe (64), thereby blowing air to the inner side of the screening pipe (3) through the inclined pipe (65), so as to blow up the dust in the grass seeds. The wind will carry the dust through the arc piece (68) and be discharged from the outlet of the ash discharge pipe (66).

Images