A seed grading device for alfalfa cross breeding

Abstract

The present application relates to the technical field of alfalfa breeding, and particularly relates to a seed grading device for alfalfa cross breeding, which comprises a screen assembly, the screen assembly comprises a screen base and a first screen, one end of the first screen is a screen feeding part, the other end is a screen discharging part, and the part of the first screen close to the screen discharging part is rotationally connected to the screen base; the screen base is provided with an elastic assembly and a baffle, the elastic assembly is used to provide elastic force to support the part of the first screen close to the screen feeding part, so that an included angle alpha is formed between the first screen and the screen base, the first screen is provided with a through hole, the through hole is used for the baffle to pass through, and the part of the baffle on the first screen is used to hinder the flow of raw materials on the first screen. The seed grading device for alfalfa cross breeding can achieve the purpose of simultaneously breeding and removing impurities from a large amount of alfalfa seeds mixed with impurities, and improve the impurity removal effect of alfalfa seed cross breeding.

Description

Technical Field

[0001] This invention relates to the field of alfalfa breeding technology, specifically to a seed grading device for alfalfa hybrid breeding. Background Technology

[0002] Alfalfa is a perennial herbaceous plant that can be used as forage. It is palatable and of high quality. Feeding dairy cows with alfalfa can increase milk production by more than 50%. In addition to being used as forage, the flowers that alfalfa produces during its growth process are also an important source of nectar for honey. Large-scale planting can also promote honey harvesting and develop the beekeeping industry.

[0003] Alfalfa reproduces through seeds. In the process of harvesting alfalfa seeds, the alfalfa grass must first be harvested and then dried to ensure that the alfalfa seeds can be stored for a long or short period of time without getting moldy. After drying, a threshing machine is usually used to separate the alfalfa seeds from the pods, and then impurities in the alfalfa seeds are removed by screening.

[0004] Before hybridization breeding of alfalfa, it is usually necessary to remove impurities. In this process, a breeding grading device is usually used to remove impurities. The breeding grading device is usually equipped with a feeding section and an inclined screen. During the impurity removal process, the alfalfa seeds mixed with impurities are put into the feeding section. The alfalfa seeds mixed with impurities flow towards the screen, so that the alfalfa seeds can pass through the screen. The impurities are located on the screen and flow out from the end of the screen. The alfalfa seeds that have been removed are located below the screen.

[0005] Although current breeding grading devices are effective at removing impurities from alfalfa seeds, the inventors have discovered shortcomings in practical use, specifically:

[0006] After separating alfalfa seeds from pods using a thresher, the resulting mixture contains alfalfa seeds, pods, and alfalfa leaves. When using a breeding grading device for impurity removal, increasing the opening size of the feed section increases the flow rate of the impure alfalfa seeds towards the screen, facilitating the simultaneous removal of large quantities of impure alfalfa seeds and shortening the grading time. However, increasing the flow rate of impure alfalfa seeds in the feed section... As the flow of seeds toward the sieve increases, a large number of alfalfa seeds mixed with impurities also flow toward the sieve simultaneously. With a significant amount of impurities in the alfalfa seeds, the likelihood of these impurities clogging the sieve mesh increases, making it more difficult for the alfalfa seeds to pass through the mesh. Thus, as the alfalfa seeds mixed with impurities flow along the inclined sieve from the higher to the lower part of the sieve, some alfalfa seeds pass through the mesh, while others flow out from the lower part of the sieve along with impurities such as pods or alfalfa leaves, resulting in insufficient removal of impurities from the alfalfa seeds.

[0007] Therefore, based on the above shortcomings, there is an urgent need to design a seed grading device for alfalfa hybrid breeding, so as to achieve the purpose of removing impurities from a large number of alfalfa seeds mixed with impurities at the same time, and to improve the impurity removal effect when removing impurities from alfalfa seeds. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of currently used breeding grading devices in removing impurities from alfalfa seeds, and to provide a seed grading device for alfalfa hybrid breeding, so as to simultaneously remove impurities from a large number of alfalfa seeds mixed with impurities during the breeding process, and to improve the impurity removal effect when removing impurities from alfalfa seeds.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0010] A seed grading device for alfalfa hybrid breeding includes a screen assembly, the screen assembly including a screen base and a first screen, the first screen being used to remove impurities from the seeds for breeding, one end of the first screen being a screen feed section and the other end being a screen discharge section, the portion of the first screen near the screen discharge section being rotatably connected to the screen base.

[0011] The screen base is provided with an elastic component and a baffle. The elastic component is used to provide elastic force to support the part of the first screen near the screen feed section, so that an included angle α is formed between the first screen and the screen base. The first screen is provided with a through hole for the baffle to pass through. The part of the baffle on the first screen is used to obstruct the flow of raw material on the first screen.

[0012] After raw materials are fed into the screen feeding section, the load capacity of the first screen increases, which increases the load on the elastic component, reduces the included angle α, and increases the length of the baffle extending from the through hole onto the first screen.

[0013] As the preferred technical solution of this application, the elastic component includes a telescopic sleeve, a first spring and a base. One end of the telescopic sleeve is connected to the screen base, and the other end is used to support the first screen. The telescopic sleeve includes a plurality of sub-sleeves, which are nested together to enable the telescopic sleeve to extend and retract.

[0014] The first sub-sleeve is a sub-sleeve on the telescopic sleeve that is used to connect with the screen base, and the second sub-sleeve is a sub-sleeve on the telescopic sleeve that is used to support the first screen. The base is disposed inside the first sub-sleeve, and the first spring is disposed inside the telescopic sleeve. One end of the first spring is connected to the base, and the other end is connected to the second sub-sleeve. The position of the base relative to the first sub-sleeve along the length of the first sub-sleeve is adjustable.

[0015] As a preferred technical solution of this application, the elastic component further includes a locking member. A movable groove is provided on the side wall of the first sub-sleeve. The locking member passes through the movable groove and is threadedly connected to the base. By rotating the locking member relative to the base, the locking member abuts against or releases the abutment action with the outer wall of the first sub-sleeve, so that the base is fixed relative to the first sub-sleeve or movable relative to the first sub-sleeve.

[0016] As the preferred technical solution of this application, the screen seat is provided with a baffle group, the baffle group includes two baffles, each baffle is adapted to a single through hole, the middle section of the baffle is the baffle middle section, and the baffle middle section is arc-shaped;

[0017] The upper section of the stop bar is called the upper section of the stop bar, and the lower section of the stop bar is called the lower section of the stop bar. The lower section of the stop bar is elastic so that it can bend under force.

[0018] The middle section of the baffle bar includes a first arc segment and a second arc segment. When the first screen is not carrying raw material, the middle section of the baffle bar is located on the first screen. As the included angle α gradually decreases, the middle section of the baffle bar gradually moves downward towards the first screen, so that the first arc segment and the second arc segment pass through the through hole in sequence. During the process of the first arc segment passing through the through hole, the distance between the upper sections of the baffle bars on the two baffle bars in the baffle bar group gradually decreases. During the process of the second arc segment passing through the through hole, the distance between the upper sections of the baffle bars on the two baffle bars in the baffle bar group gradually increases.

[0019] As the preferred technical solution of this application, the screen base is provided with a plurality of baffle groups, and the plurality of baffle groups are distributed along the length direction and / or width direction of the screen base.

[0020] As the preferred technical solution of this application, when the first screen is not carrying raw materials and the telescopic sleeve supports the first screen, the upper end of the baffle is located in the through hole.

[0021] As the preferred technical solution of this application, the sieve base includes a second sieve, wherein the sieve hole diameter of the second sieve is smaller than that of the first sieve.

[0022] As a preferred technical solution of this application, the screen base further includes a base, the second screen is disposed on the base, the base is provided with a slot, the first screen is provided with a block, the block is engaged in the slot so that the first screen is rotatably connected to the screen base; and the block can be separated from the slot.

[0023] As a preferred technical solution of this application, the first screen and / or the second screen are provided with a surrounding plate, which is used to prevent the material on the corresponding first screen or second screen from spilling out.

[0024] As a preferred technical solution of this application, the seed grading device for alfalfa hybrid breeding further includes a vibration component. The vibration component includes a first base plate, a second base plate, and a drive motor. A sliding groove is provided on the first base plate, and the second base plate is locked in the sliding groove, so that the second base plate can move relative to the first base plate along the length direction of the sliding groove. The drive motor is provided on the first base plate and is used to drive the second base plate to reciprocate along the length direction of the sliding groove.

[0025] The screen assembly is mounted on the second base plate. When the vibration assembly drives the second base plate to reciprocate along the length of the chute, the screen assembly vibrates in the horizontal direction.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In the scheme of this application, by rotatably connecting the portion of the first screen near the screen discharge section to the screen base, and by using an elastic component to support the portion of the first screen near the screen feed section, after raw materials (a mixture of alfalfa seeds, pods, and leaves) are fed into the screen feed section, the load on the elastic component increases as the first screen bears the raw materials, reducing the included angle α and lowering the slope formed by the first screen. Furthermore, the more raw materials fed into the screen feed section at a time, the smaller the included angle α, and the gentler the slope formed by the first screen, thereby reducing... The speed at which the raw material flows from the high point to the low point of the first screen allows for more thorough removal of impurities from alfalfa seeds, facilitating the separation of alfalfa seeds from pods and leaves. Simultaneously, without increasing the amount of raw material, the load on the first screen decreases as the alfalfa seeds undergo continuous breeding and impurity removal, reducing the load on the elastic components and increasing the included angle α. This gradually steepens the slope formed by the first screen, thereby appropriately increasing the breeding and impurity removal speed of the raw material as the breeding and impurity removal process continues, thus improving the breeding and impurity removal efficiency.

[0028] Meanwhile, by setting baffles, the portion of the baffles located on the first screen can obstruct the flow of raw materials on the first screen. The more raw materials are fed into the screen feed section, the smaller the included angle α becomes, which makes the portion of the baffles located on the first screen longer. This makes the obstruction effect of the baffles on the flow of raw materials on the first screen more obvious. In this way, the flow speed of raw materials on the first screen can be further slowed down, which is more conducive to the first screen to remove impurities from the raw materials for breeding, making the breeding impurity removal more thorough.

[0029] Furthermore, as the first screen continuously removes impurities from the raw material, the included angle α gradually decreases, causing the portion of the baffle on the first screen to gradually shorten. After applying vibration during the impurity removal process, the alfalfa seeds in the raw material are more likely to move to the lower layer of the raw material, making it easier for the pods and alfalfa leaves to be located on the upper layer of the raw material and the alfalfa seeds to be located on the lower layer. Because the portion of the baffle on the first screen becomes shorter, the obstruction effect of the baffle on the upper layer of raw material is reduced, which makes it easier for the upper layer of raw material to flow towards the screen discharge section, further improving the impurity removal effect of removing pods and alfalfa leaves from alfalfa seeds.

[0030] Meanwhile, during the feeding of raw materials into the screen feed section, a large amount of raw materials can be fed at once, which can achieve the purpose of breeding and removing impurities from a large number of alfalfa seeds mixed with impurities at the same time. There is no need to continuously feed materials into the screen feed section through the feeding device, which can avoid the blockage of the feed pipe during continuous feeding of raw materials. Moreover, the staff does not need to control the feeding flow rate. Its screen assembly can automatically adjust the inclination of the first screen according to the weight of the raw materials fed at one time, thereby regulating the flow speed of the raw materials on the first screen, which can further reduce the workload of the staff and make it more conducive to breeding and removing impurities from alfalfa seeds.

[0031] 2. Furthermore, a set of baffles is installed on the screen base, and the middle section of the baffles is set in an arc shape. When there is no raw material on the first screen, the middle section of the baffle is located on the first screen. After raw material is fed into the screen feed section, the load on the elastic component increases, causing the included angle α to decrease. This allows the first arc segment to move through the through hole to the lower part of the first screen, or the first arc segment and the second arc segment to move through the through hole to the lower part of the first screen in sequence. During this movement of the middle section of the baffle, the distance between the upper sections of the two baffles in the baffle set decreases, or the distance between the upper sections of the two baffles decreases first. As the size increases, the lower section of the baffles adapts and bends. During subsequent breeding and impurity removal, alfalfa seeds are gradually impurized. Without additional feed, the load-bearing capacity of the first screen decreases, causing the included angle α to gradually increase. This leads to the movement of the first arc segment relative to the through-hole, which in turn changes the distance between the upper sections of the two baffles in the baffle group. On one hand, the upper section of the baffle, whose position has changed, can agitate the raw material on the first screen, making it easier for alfalfa seeds mixed in pods or alfalfa leaves to flow to the lower layer of raw material, thus facilitating the breeding and impurity removal of alfalfa seeds; on the other hand... On the one hand, after several baffle groups are set up, as the included angle α gradually increases, the first arc segment moves upward through the through hole to the top of the first screen, or the second arc segment and the first arc segment move upward through the through hole sequentially to the top of the first screen. During the movement of the first arc segment upward through the through hole, the distance between the upper sections of the two baffles in the baffle group increases. Alternatively, during the movement of the second arc segment and the first arc segment upward through the through hole sequentially to the top of the first screen, the distance between the upper sections of the two baffles in the baffle group first decreases and then increases. When the distance between the upper sections of the baffle increases, there is a situation where the distance between the upper sections of two adjacent baffle groups decreases. In this case, when the distance between the upper sections of two baffles decreases, there is a situation where the upper sections of the two baffles with the reduced distance clamp the pods or alfalfa leaves. With the vibration during the breeding and impurity removal process, it is more conducive for the upper sections of the baffles to drive the clamped pods or alfalfa leaves to vibrate, thereby making it easier to shake out the alfalfa seeds mixed in the pods or alfalfa leaves, further facilitating the separation of alfalfa seeds from the pods or alfalfa leaves, and further improving the breeding and impurity removal effect of alfalfa seeds. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one embodiment of a seed grading device for alfalfa hybrid breeding according to this application;

[0033] Figure 2 This is a schematic diagram of the structure of the sieve assembly mounted on the frame in one embodiment of the seed grading device for alfalfa hybrid breeding according to this application;

[0034] Figure 3 This is a schematic diagram of the elastic component in one embodiment of a seed grading device for alfalfa hybrid breeding according to this application.

[0035] Figure 4 This is a schematic diagram of the structure of the first screen in one embodiment of a seed grading device for alfalfa hybrid breeding according to this application;

[0036] Figure 5 This is a schematic diagram of the connection between the first screen and the screen base in one embodiment of a seed grading device for alfalfa hybrid breeding according to this application.

[0037] Figure 6 This is a schematic diagram of the structure at the baffle when the middle section of the baffle is arc-shaped in one embodiment of the seed grading device for alfalfa hybrid breeding according to this application.

[0038] Figure 7 This is a schematic diagram of the structure of one embodiment of the seed grading device for alfalfa hybrid breeding according to this application, from another perspective.

[0039] The diagram shows: 1-Screen assembly, 2-Screen base, 3-First screen, 4-Screen feed section, 5-Screen discharge section, 6-Elastic component, 7-Baffle bar, 8-Through hole, 9-Telescopic sleeve, 10-First spring, 11-Base, 12-Sub-sleeve, 13-First sub-sleeve, 14-Second sub-sleeve, 15-Locking component, 16-Moving groove, 17-Baffle bar assembly, 18-Middle section of baffle bar, 19-Upper section of baffle bar, 20-Lower section of baffle bar, 21-First arc segment, 22-Second arc segment, 23-Second screen, 24-Base, 25-Slot, 26-Slot block, 27-Enclosure plate, 28-Vibration component, 29-First base plate, 30-Second base plate, 31-Drive motor, 32-Slide groove, 33-Second spring, 34-Cam. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Example 1: This example provides a seed grading device for alfalfa hybrid breeding. See [link to example]. Figures 1-4 As shown, the device includes a screen assembly 1, which includes a screen base 2 and a first screen 3. The first screen 3 is used to remove impurities from seeds for breeding. One end of the first screen 3 is a screen feed section 4, and the other end is a screen discharge section 5. The portion of the first screen 3 near the screen discharge section 5 is rotatably connected to the screen base 2.

[0046] The screen base 2 is provided with an elastic component 6 and a baffle 7. The elastic component 6 is used to provide elastic force to support the part of the first screen 3 near the screen feed part 4, so that the first screen 3 and the screen base 2 form an included angle α. The first screen 3 is provided with a through hole 8, which is used for the baffle 7 to pass through. The part of the baffle 7 located on the first screen 3 is used to obstruct the flow of raw materials on the first screen 3.

[0047] After raw materials are fed into the screen feed section 4, the load capacity of the first screen 3 increases, which increases the load on the elastic component 6, reduces the included angle α, and increases the length of the baffle 7 extending from the through hole 8 onto the first screen 3.

[0048] In this application, by rotatably connecting the portion of the first screen 3 near the screen discharge section 5 to the screen base 2, and by using the elastic component 6 to support the portion of the first screen 3 near the screen feed section 4, after raw materials (a mixture of alfalfa seeds, pods, and leaves) are fed into the screen feed section 4, the load on the elastic component 6 increases as the first screen 3 bears the raw materials, reducing the included angle α and lowering the slope formed by the first screen 3. Furthermore, the more raw materials are fed into the screen feed section 4 at a time, the smaller the included angle α becomes, and the gentler the slope formed by the first screen 3. This reduces the risk of raw materials falling off the first screen 3. The speed at which the alfalfa seeds flow from the high point of the first screen 3 to the low point of the second screen 3 allows for more thorough screening and impurity removal, facilitating the separation of alfalfa seeds from pods and leaves. Simultaneously, without increasing the amount of raw materials, the load on the first screen 3 decreases as the alfalfa seeds undergo continuous breeding impurity removal, reducing the load on the elastic component 6 and increasing the included angle α. This gradually steepens the slope formed by the first screen 3, thereby appropriately increasing the breeding impurity removal speed of the raw materials as the breeding impurity removal process continues, thus improving the breeding impurity removal efficiency, reducing the number of impurities in the seeds, and further facilitating alfalfa hybridization breeding.

[0049] Meanwhile, by setting the baffle 7, the portion of the baffle 7 located on the first screen 3 can obstruct the flow of raw materials on the first screen 3. The more raw materials are fed into the screen feed section 4, the smaller the included angle α becomes, which makes the portion of the baffle 7 located on the first screen 3 longer. This makes the obstruction effect of the baffle 7 on the flow of raw materials on the first screen 3 more obvious. In this way, the flow speed of raw materials on the first screen 3 can be further slowed down, which is more conducive to the first screen 3 to remove impurities from the raw materials for breeding, making the breeding impurity removal more thorough.

[0050] Furthermore, as the first screen 3 continuously removes impurities from the raw materials, the included angle α gradually decreases, causing the portion of the baffle 7 located on the first screen 3 to gradually shorten. After applying vibration during the breeding and impurity removal process, the alfalfa seeds in the raw materials are more likely to move to the lower layer of the raw materials, making it easier for the pods and alfalfa leaves to be located on the upper layer of the raw materials and the alfalfa seeds to be located on the lower layer. Because the portion of the baffle 7 located on the first screen 3 becomes shorter, the blocking effect of the baffle 7 on the upper layer of raw materials can be reduced, which makes it easier for the upper layer of raw materials to flow towards the screen discharge section 5, further improving the breeding and impurity removal effect of removing pods and alfalfa leaves from alfalfa seeds.

[0051] Meanwhile, during the feeding of raw materials into the screen feed section 4, a large amount of raw materials can be fed at once, which can achieve the purpose of breeding and removing impurities from a large number of alfalfa seeds mixed with impurities at the same time. There is no need to continuously feed materials into the screen feed section 4 through the feeding device, which can avoid the blockage of the feed pipe during continuous feeding of raw materials. Moreover, the staff does not need to control the feeding flow rate. The screen assembly 1 can automatically adjust the inclination of the first screen 3 according to the weight of the raw materials fed at one time, thereby regulating the flow speed of the raw materials on the first screen 3, which can further reduce the workload of the staff and make it more conducive to breeding and removing impurities from alfalfa seeds.

[0052] In a preferred embodiment, based on the above method, the elastic component 6 further includes a telescopic sleeve 9, a first spring 10 and a base 11. One end of the telescopic sleeve 9 is connected to the screen base 2, and the other end is used to support the first screen 3. The telescopic sleeve 9 includes a plurality of sub-sleeves 12, which are nested together to enable the telescopic sleeve 9 to extend and retract.

[0053] The first sub-sleeve 13 is the sub-sleeve 12 on the telescopic sleeve 9 that is used to connect with the screen base 2, and the second sub-sleeve 14 is the sub-sleeve 12 on the telescopic sleeve 9 that is used to support the first screen 3. The base 11 is disposed inside the first sub-sleeve 13, and the first spring 10 is disposed inside the telescopic sleeve 9. One end of the first spring 10 is connected to the base 11, and the other end is connected to the second sub-sleeve 14. The position of the base 11 relative to the first sub-sleeve 13 is adjustable along the length direction of the first sub-sleeve 13.

[0054] Furthermore, by setting several sub-sleeves 12 and a base 11 for the first spring 10, and making the position of the base 11 relative to the first sub-sleeve 13 along the length direction of the first sub-sleeve 13 adjustable, the deformation of the first spring 10 or the length of the telescopic sleeve 9 in the elastic component 6 in the initial state can be adjusted. In this application, the elastic component 6 in the initial state refers to the elastic component 6 supporting the first screen 3 and the first screen 3 not bearing any load. This facilitates the adjustment of the relationship between the weight of the raw material fed into the screen feed section 4 and the degree of change of the included angle α, thereby further improving the convenience of adjusting the flow speed of the raw material on the first screen 3 and improving the flexibility of the device in this application when breeding and removing impurities from alfalfa seeds.

[0055] In a preferred embodiment, based on the above method, the elastic component 6 further includes a locking member 15. A movable groove 16 is provided on the side wall of the first sub-sleeve 13. The locking member 15 passes through the movable groove 16 and is threadedly connected to the base 11. By rotating the locking member 15 relative to the base 11, the locking member 15 abuts against or releases the abutment action with the outer wall of the first sub-sleeve 13, so that the base 11 is fixed relative to the first sub-sleeve 13 or movable relative to the first sub-sleeve 13.

[0056] Furthermore, by providing a locking member 15, which passes through the movable groove 16 and is threadedly connected to the base 11, the locking member 15 can rotate relative to the base 11 to abut or release the abutment between the locking member 15 and the outer wall of the first sub-sleeve 13. When the locking member 15 abuts the outer wall of the first sub-sleeve 13, the base 11 is fixed relative to the first sub-sleeve 13. When the abutment between the locking member 15 and the outer wall of the first sub-sleeve 13 is released, the base 11 is movable relative to the first sub-sleeve 13. This improves the convenience of adjusting the position of the base 11.

[0057] Example 2: Based on the technical solution of Example 1, further details are provided below. Figure 1 , Figure 3 and Figure 5 As shown, the screen base 2 is provided with a baffle group 17, which includes two baffles 7. Each baffle 7 is adapted to a single through hole 8. The middle section of the baffle 7 is the baffle middle section 18, which is arc-shaped.

[0058] The upper section of the stop bar 7 is the upper section 19, and the lower section of the stop bar 7 is the lower section 20. The lower section 20 is elastic so that it can bend under force.

[0059] The middle section 18 of the baffle bar includes a first arc segment 21 and a second arc segment 22. When the first screen 3 is not carrying raw materials, the middle section 18 of the baffle bar is located on the first screen 3. As the included angle α gradually decreases, the middle section 18 of the baffle bar gradually moves downward towards the first screen 3, so that the first arc segment 21 and the second arc segment 22 pass through the through hole 8 in sequence. During the process of the first arc segment 21 passing through the through hole 8, the distance between the upper sections 19 of the baffle bars on the two baffle bars 7 in the baffle bar group 17 gradually decreases. During the process of the second arc segment 22 passing through the through hole 8, the distance between the upper sections 19 of the baffle bars on the two baffle bars 7 in the baffle bar group 17 gradually increases.

[0060] As a preferred embodiment, based on the above method, the screen base 2 is further provided with a plurality of baffle groups 17, and the plurality of baffle groups 17 are distributed along the length direction and / or width direction of the screen base 2.

[0061] Furthermore, a baffle assembly 17 is provided on the screen base 2, and the middle section 18 of the baffle is set in an arc shape, so that when there is no raw material on the first screen 3, the middle section 18 of the baffle is located on the first screen 3. After the raw material is fed into the screen feed section 4, the load of the elastic component 6 increases, which reduces the included angle α, allowing the first arc segment 21 to move through the through hole 8 to the lower part of the first screen 3, or allowing the first arc segment 21 and the second arc segment 22 to move through the through hole 8 to the lower part of the first screen 3 in sequence. During the movement of the middle section 18 of the baffle, the distance between the upper sections 19 of the two baffles in the baffle assembly 17 decreases or the distance between the upper sections of the two baffles decreases. The distance between the upper sections 19 and 19 first decreases and then increases, causing the lower section 20 of the baffle to bend adaptively. During subsequent breeding and impurity removal, the alfalfa seeds are gradually removed. Without additional feed, the load-bearing capacity of the first screen 3 decreases, causing the included angle α to gradually increase. This causes the first arc segment 21 to move relative to the through hole 8, thus changing the distance between the upper sections 19 of the two baffles in the baffle group 17. On one hand, the changed position of the upper section 19 of the baffle can agitate the raw materials on the first screen 3, making it easier for alfalfa seeds mixed in pods or alfalfa leaves to flow to the lower layer of raw materials, thus facilitating the breeding and impurity removal of alfalfa seeds; on the other hand… In terms of the arrangement of the baffle groups 17, as the included angle α gradually increases, the first arc segment 21 moves upward through the through hole 8 towards the top of the first screen 3, or the second arc segment 22 and the first arc segment 21 move upward through the through hole 8 in sequence. During the movement of the first arc segment 21 upward through the through hole 8, the distance between the upper sections 19 of the two baffles in the baffle group 17 increases. Alternatively, during the movement of the second arc segment 22 and the first arc segment 21 upward through the through hole 8 in sequence, the distance between the upper sections 19 of the two baffles in the baffle group 17 first decreases and then increases. When the distance between the upper sections 19 of two baffles in the baffle group 17 increases, there is a situation where the distance between the upper sections 19 of two adjacent baffle groups 17 decreases. Thus, when the distance between the upper sections 19 of two baffles decreases, there is a situation where the upper sections 19 of two baffles with a smaller distance clamp the pods or alfalfa leaves. With the vibration during the breeding impurity removal process, it is more conducive for the upper sections 19 of the baffles to drive the clamped pods or alfalfa leaves to vibrate, thereby making it easier to shake out the alfalfa seeds mixed in the pods or alfalfa leaves, further facilitating the separation of alfalfa seeds from the pods or alfalfa leaves, and further improving the breeding impurity removal effect of alfalfa seeds.

[0062] As a preferred embodiment, based on the above method, when the first screen 3 is not carrying raw materials and the telescopic sleeve 9 supports the first screen 3, the upper end of the baffle 7 is located inside the through hole 8.

[0063] Furthermore, when the first screen 3 is not carrying raw materials and the telescopic sleeve 9 supports the first screen 3, the upper end of the baffle 7 is located inside the through hole 8, which can improve the stability of the baffle 7 and the through hole 8.

[0064] Example 3: Based on the technical solutions of Example 1 or Example 2, further details can be found in the following examples. Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the sieve base 2 includes a second sieve 23, the diameter of the sieve hole of the second sieve 23 being smaller than the diameter of the sieve hole of the first sieve 3.

[0065] Furthermore, by setting a second screen 23, the diameter of the screen openings of the second screen 23 is smaller than that of the first screen 3, so as to further remove impurities from the alfalfa seeds that have been bred and purified on the first screen 3, thereby further improving the bred impurity removal effect of alfalfa seeds.

[0066] Meanwhile, the second screen 23 is provided with a second screen 23 unit, which is detachably mounted on the second screen 23. The second screen 23 unit has various models, with different models corresponding to different screen aperture diameters. By selecting different models of the second screen 23 unit, it is possible to remove impurities from seeds of different diameters during breeding, thereby improving the flexibility of seed breeding impurity removal. It is not only applicable to the breeding impurity removal of alfalfa seeds, but also to the breeding impurity removal of other seeds. The second screen 23 unit can be fixed to the second screen 23 by means of snap-fit ​​or threaded connection. The specific fixing method is existing technology and will not be described in detail here.

[0067] In a preferred embodiment, based on the above method, the sieve base 2 further includes a base 24, the second sieve 23 is disposed on the base 24, the base 24 is provided with a slot 25, the first sieve 3 is provided with a locking block 26, the locking block 26 is locked in the slot 25 so that the first sieve 3 is rotatably connected to the sieve base 2; and the locking block 26 can be separated from the slot 25.

[0068] Furthermore, by setting a locking block 26 on the first screen 3, the locking block 26 is locked in the locking groove 25, and the first screen 3 is rotatably connected to the screen base 2. This facilitates the rotation of the first screen 3 relative to the screen base 2, thereby making it easier to change the inclination of the first screen 3. At the same time, the locking block 26 can be separated from the locking groove 25, so that the first screen 3 can be separated from the base 24, thereby facilitating the replacement of the first screen 3 and changing the diameter of the screen holes on the first screen 3. This allows the device of this application to also perform breeding and impurity removal on other seeds.

[0069] As a preferred embodiment, based on the above method, the first screen 3 and / or the second screen 23 are further provided with a surrounding plate 27, which is used to prevent the material on the corresponding first screen 3 or second screen 23 from spilling out.

[0070] As a preferred embodiment, based on the above method, the seed grading device for alfalfa hybrid breeding further includes a vibration component 28. The vibration component 28 includes a first base plate 29, a second base plate 30, and a drive motor 31. The first base plate 29 is provided with a sliding groove 32, and the second base plate 30 is engaged in the sliding groove 32, so that the second base plate 30 can move relative to the first base plate 29 along the length direction of the sliding groove 32. The drive motor 31 is disposed on the first base plate 29, and the drive motor 31 is used to drive the second base plate 30 to reciprocate along the length direction of the sliding groove 32.

[0071] The screen assembly 1 is disposed on the second base plate 30. When the vibration assembly 28 drives the second base plate 30 to reciprocate along the length direction of the slide groove 32, the screen assembly 1 vibrates in the horizontal direction.

[0072] Furthermore, by setting up a vibration component 28, the second base plate 30 is driven to reciprocate along the length of the chute 32, thereby driving the screen assembly 1 to vibrate in the horizontal direction, which further facilitates the breeding and impurity removal of alfalfa seeds on the first screen 3.

[0073] Meanwhile, a second spring 33 is provided between the first base plate 29 and the second base plate 30. One end of the second spring 33 is connected to the first base plate 29 and the other end is connected to the second base plate 30. A cam 34 is provided on the output shaft of the drive motor 31. The outer surface of the cam 34 is used to contact the second base plate 30. The drive motor 31 drives the cam 34 to rotate. When the cam 34 rotates, it can drive the second base plate 30 to move relative to the first base plate 29, and cause the elastic force of the second spring 33 to change. The second spring 33 provides elastic force to reset the second base plate 30. Thus, when the cam 34 is driven by the drive motor 31 to rotate, the second base plate 30 reciprocates relative to the first base plate 29 along the direction of the slide groove 32.

[0074] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A seed grading device for alfalfa hybrid breeding, characterized in that: The system includes a screen assembly, which includes a screen base and a first screen. The first screen is used to remove impurities from seeds for breeding. One end of the first screen is a screen feed section, and the other end is a screen discharge section. The portion of the first screen near the screen discharge section is rotatably connected to the screen base. The screen base is provided with an elastic component and a baffle. The elastic component is used to provide elastic force to support the part of the first screen near the screen feed section, so that an included angle α is formed between the first screen and the screen base. The first screen is provided with a through hole for the baffle to pass through. The part of the baffle on the first screen is used to obstruct the flow of raw material on the first screen. After raw materials are fed into the screen feeding section, the load capacity of the first screen increases, which increases the load on the elastic component, reduces the included angle α, and increases the length of the baffle extending from the through hole onto the first screen. The screen base is provided with a baffle group, which includes two baffles. Each baffle is adapted to a single through hole. The middle section of the baffle is arc-shaped. The upper section of the stop bar is called the upper section of the stop bar, and the lower section of the stop bar is called the lower section of the stop bar. The lower section of the stop bar is elastic so that it can bend under force. The middle section of the baffle bar includes a first arc segment and a second arc segment. When the first screen is not carrying raw material, the middle section of the baffle bar is located on the first screen. As the included angle α gradually decreases, the middle section of the baffle bar gradually moves downward towards the first screen, so that the first arc segment and the second arc segment pass through the through hole in sequence. During the process of the first arc segment passing through the through hole, the distance between the upper sections of the baffle bars on the two baffle bars in the baffle bar group gradually decreases. During the process of the second arc segment passing through the through hole, the distance between the upper sections of the baffle bars on the two baffle bars in the baffle bar group gradually increases.

2. The seed grading device for alfalfa hybrid breeding as described in claim 1, characterized in that: The elastic component includes a telescopic sleeve, a first spring, and a base. One end of the telescopic sleeve is connected to the screen base, and the other end is used to support the first screen. The telescopic sleeve includes several sub-sleeves, which are nested together to allow the telescopic sleeve to extend and retract. The first sub-sleeve is a sub-sleeve on the telescopic sleeve that is used to connect with the screen base, and the second sub-sleeve is a sub-sleeve on the telescopic sleeve that is used to support the first screen. The base is disposed inside the first sub-sleeve, and the first spring is disposed inside the telescopic sleeve. One end of the first spring is connected to the base, and the other end is connected to the second sub-sleeve. The position of the base relative to the first sub-sleeve along the length of the first sub-sleeve is adjustable.

3. The seed grading device for alfalfa hybrid breeding as described in claim 2, characterized in that: The elastic component also includes a locking member. A movable groove is provided on the side wall of the first sub-sleeve. The locking member passes through the movable groove and is threadedly connected to the base. By rotating the locking member relative to the base, the locking member abuts against or releases the abutment action with the outer wall of the first sub-sleeve, so that the base is fixed relative to the first sub-sleeve or movable relative to the first sub-sleeve.

4. The seed grading device for alfalfa hybrid breeding as described in claim 3, characterized in that: The screen base is provided with a plurality of baffle groups, which are distributed along the length and / or width direction of the screen base.

5. The seed grading device for alfalfa hybrid breeding as described in claim 4, characterized in that: When the first screen is not carrying any raw material and the telescopic sleeve supports the first screen, the upper end of the baffle is located inside the through hole.

6. The seed grading device for alfalfa hybrid breeding as described in claim 5, characterized in that: The sieve base includes a second sieve, the diameter of the sieve openings of the second sieve being smaller than the diameter of the sieve openings of the first sieve.

7. The seed grading device for alfalfa hybrid breeding as described in claim 6, characterized in that: The screen base also includes a base, the second screen is disposed on the base, the base is provided with a slot, the first screen is provided with a block, the block is engaged in the slot so that the first screen is rotatably connected to the screen base; and the block can be separated from the slot.

8. The seed grading device for alfalfa hybrid breeding as described in claim 7, characterized in that: The first screen and / or the second screen are provided with a partition plate, which is used to prevent the material on the corresponding first screen or second screen from spilling out.

9. A seed grading device for alfalfa hybrid breeding as described in any one of claims 1-8, characterized in that: The seed grading device for alfalfa hybrid breeding also includes a vibration component, which includes a first base plate, a second base plate and a drive motor. The first base plate is provided with a sliding groove, and the second base plate is locked in the sliding groove so that the second base plate can move relative to the first base plate along the length direction of the sliding groove. The drive motor is provided on the first base plate and is used to drive the second base plate to reciprocate along the length direction of the sliding groove. The screen assembly is mounted on the second base plate. When the vibration assembly drives the second base plate to reciprocate along the length of the chute, the screen assembly vibrates in the horizontal direction.

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