Seed grading device for alfalfa crossbreeding

Abstract

The invention relates to the technical field of alfalfa breeding, in particular to a seed grading device for alfalfa crossbreeding, which comprises a screen assembly, the screen assembly comprises a screen seat and a first screen, one end of the first screen is a screen feeding part, the other end of the first screen is a screen discharging part, and the part, close to the screen discharging part, of the first screen is rotatably connected to the screen seat; an elastic assembly and a barrier strip are arranged on the screen seat, the elastic assembly is used for providing elastic force to support the part, close to the feeding part of the screen, of the first screen so that an included angle alpha can be formed between the first screen and the screen seat, a through hole is formed in the first screen, and the barrier strip can penetrate through the through hole; the part, located on the first screen, of the blocking strip is used for blocking flowing of the raw materials on the first screen. According to the seed grading device for alfalfa crossbreeding, the purpose of breeding and impurity removal of a large number of alfalfa seeds mixed with impurities at the same time can be achieved, and the impurity removal effect of crossbreeding of the alfalfa seeds is improved.

Description

Technical Field

[0001] The invention relates to the technical field of alfalfa breeding, and in particular to a seed grading device for alfalfa hybrid breeding. Background Art

[0002] Alfalfa is a perennial herb that can be used as forage. It has high palatability and quality. Feeding dairy cows with alfalfa can increase milk production by more than 50%. At the same time, in addition to being used as forage, the flowers that alfalfa blooms during its growth process are also an important source of honey. Large-scale planting can also promote honey collection and develop the beekeeping industry.

[0003] Alfalfa is propagated by seeds. In the process of harvesting alfalfa seeds, the alfalfa grass must be harvested first, and then the harvested alfalfa grass must be dried to ensure that the alfalfa seeds can be stored for a long or short period of time and will not mold. After drying, a thresher is usually used to separate the alfalfa seeds from the pods, and then the impurities in the alfalfa seeds are removed by screening.

[0004] Before hybrid breeding of alfalfa, it is usually necessary to remove impurities. In this process, a breeding grading device is usually used for the impurity removal operation. The breeding grading device is usually provided with a feed part and an inclined screen. When removing impurities, after the alfalfa seeds mixed with impurities are put into the feed part, the alfalfa seeds mixed with impurities flow toward the screen, so that the alfalfa seeds can pass through the screen, and the impurities are located on the screen, so that the impurities flow out from the end of the screen, and the alfalfa seeds after the impurities are removed are located below the screen.

[0005] Although the current breeding grading device can effectively remove impurities in alfalfa seeds when removing impurities from alfalfa seeds, the inventors found that the current breeding grading device still has some shortcomings during actual use, specifically: After the alfalfa seeds are separated from the pods by using a thresher, a mixture of alfalfa seeds, pods and alfalfa leaves is obtained. When the breeding grading device is used for impurity removal, the flow rate of the alfalfa seeds mixed with impurities in the feed section to the screen can be increased by increasing the opening size of the feed section, which is more conducive to the flow of the alfalfa seeds mixed with impurities in the feed section to the screen, so as to achieve the purpose of simultaneously removing impurities from a large number of alfalfa seeds mixed with impurities, thereby shortening the time for removing impurities and grading the alfalfa seeds. However, when the opening size of the alfalfa seeds mixed with impurities in the feed section is increased, the flow rate of the alfalfa seeds mixed with impurities in the feed section to the screen is increased. After the flow of seeds toward the screen, a large number of alfalfa seeds mixed with impurities will flow toward the screen at the same time. When there are more impurities in the alfalfa seeds, the probability of the impurities blocking the mesh of the screen increases, which will increase the difficulty of the alfalfa seeds passing through the mesh of the screen. In this way, as the alfalfa seeds mixed with impurities continue to flow from the high point of the screen to the low point of the screen along the inclined screen, some alfalfa seeds pass through the mesh of the screen, and some alfalfa seeds flow out from the low point of the screen together with impurities such as bean pods or alfalfa leaves, thereby making the impurity removal of the alfalfa seeds insufficient.

[0006] Therefore, based on the above-mentioned shortcomings, there is an urgent need to design a seed grading device for alfalfa hybrid breeding, so as to achieve the purpose of simultaneously breeding and removing impurities from a large number of alfalfa seeds mixed with impurities, and to improve the impurity removal effect of alfalfa seeds. Summary of the invention

[0007] The purpose of the present invention is to provide a seed grading device for alfalfa hybrid breeding in view of the above-mentioned shortcomings of the currently used breeding grading device when removing impurities from alfalfa seeds, so as to achieve the purpose of simultaneously removing impurities from a large number of alfalfa seeds mixed with impurities during the breeding process and to improve the impurity removal effect of alfalfa seeds.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A seed grading device for alfalfa hybrid breeding comprises a screen assembly, wherein the screen assembly comprises a screen seat and a first screen, wherein the first screen is used for seed breeding and impurity removal, wherein one end of the first screen is a screen feed portion, and the other end is a screen discharge portion, and a portion of the first screen close to the screen discharge portion is rotatably connected to the screen seat; The sieve seat is provided with an elastic component and a baffle, the elastic component is used to provide elastic force to support the portion of the first sieve close to the sieve feed portion, so that an angle α is formed between the first sieve and the sieve seat, the first sieve is provided with a through hole, the through hole is used for the baffle to penetrate, and the portion of the baffle located on the first sieve is used to hinder the flow of raw materials on the first sieve; After the raw material is fed into the screen feed part, the load-bearing capacity of the first screen increases, which increases the load of the elastic component, reduces the angle α, and increases the length of the baffle extending from the through hole to the first screen.

[0009] As a preferred technical solution of the present 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 seat, and the other end is used to support the first screen, and the telescopic sleeve includes a plurality of sub-sleeves, and the plurality of sub-sleeves are sleeved so that the telescopic sleeve can be telescoped; The sub-sleeve on the telescopic sleeve used to be connected to the screen seat is the first sub-sleeve, and the sub-sleeve on the telescopic sleeve used to support the first screen is the second sub-sleeve. The base is arranged in the first sub-sleeve, and the first spring is arranged in 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 direction of the first sub-sleeve is adjustable.

[0010] As a preferred technical solution of the present application, the elastic component also includes a locking piece. A movable groove is provided on the side wall of the first sub-sleeve. The locking piece passes through the movable groove and is threadedly connected to the base. The locking piece is rotated relative to the base to make the locking piece and the outer wall of the first sub-sleeve resist or release the resisting effect, so that the base is fixed relative to the first sub-sleeve or movable relative to the first sub-sleeve.

[0011] As a preferred technical solution of the present application, a baffle group is provided on the sieve seat, the baffle group includes two baffles, a single 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 in an arc shape; The upper section of the baffle is the upper section of the baffle, and the lower section of the baffle is the lower section of the baffle. The lower section of the baffle is elastic so that the lower section of the baffle can bend after being subjected to force. The middle section of the baffle bar includes a first arc section and a second arc section. When the first screen does not carry raw materials, the middle section of the baffle bar is located on the first screen. When the angle α gradually decreases, the middle section of the baffle bar gradually moves toward the bottom of the first screen, so that the first arc section and the second arc section pass through the through hole in sequence. In the process of the first arc section 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. In the process of the second arc section 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.

[0012] As a preferred technical solution of the present application, a plurality of baffle bar groups are arranged on the sieve seat, and the plurality of baffle bar groups are distributed along the length direction and / or width direction of the sieve seat.

[0013] As a preferred technical solution of the present application, when the first screen does not carry raw materials and the telescopic sleeve supports the first screen, the upper end of the blocking bar is located in the through hole.

[0014] As a preferred technical solution of the present application, the sieve seat includes a second sieve, and the diameter of the sieve holes of the second sieve is smaller than the diameter of the sieve holes of the first sieve.

[0015] As a preferred technical solution of the present application, the sieve seat also includes a base, the second sieve is arranged on the base, the base is provided with a slot, the first sieve is provided with a block, the block is stuck in the slot so that the first sieve can be rotatably connected to the sieve seat; and the block can be separated from the slot.

[0016] As a preferred technical solution of the present application, a baffle is provided on the first screen and / or the second screen, and the baffle is used to prevent the material on the corresponding first screen or second screen from spilling out.

[0017] As a preferred technical solution of the present application, the seed grading device for alfalfa hybrid breeding also includes a vibration assembly, the vibration assembly includes a first bottom plate, a second bottom plate and a drive motor, the first bottom plate is provided with a slide groove, the second bottom plate is clamped in the slide groove, so that the second bottom plate can move relative to the first bottom plate along the length direction of the slide groove, the drive motor is provided on the first bottom plate, and the drive motor is used to drive the second bottom plate to reciprocate along the length direction of the slide groove; The screen assembly is arranged on the second bottom plate, and when the driving assembly drives the second bottom plate to reciprocate along the length direction of the slide slot, the screen assembly vibrates in the horizontal direction.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. In the scheme of the present application, the portion of the first screen close to the screen discharge portion is rotatably connected to the screen seat, and the elastic component supports the portion of the first screen close to the screen feed portion. After the raw material is fed into the screen feed portion, the raw material is a mixture of alfalfa seeds, bean pods and alfalfa leaves. After the first screen carries the raw material, the load of the elastic component is increased, the angle α is reduced, and the slope formed by the first screen is reduced. Moreover, the more raw materials are fed into the screen feed portion at a time, the smaller the angle α is, and the gentler the slope formed by the first screen is, so as to reduce The speed at which the raw material flows from the high point of the first screen to the low point of the first screen on the first screen can make the alfalfa seeds more thoroughly cleaned and is more conducive to the separation of the alfalfa seeds from the pods and alfalfa leaves. At the same time, without increasing the raw material, in the process of the alfalfa seeds being continuously cleaned by breeding, the load on the first screen is reduced, which can reduce the load of the elastic component, increase the angle α, and thus gradually steepen the slope formed by the first screen, so that the breeding and cleaning speed of the raw material can be appropriately increased as the breeding and cleaning process continues, thereby improving the breeding and cleaning efficiency; At the same time, by setting the baffle, the part of the baffle located on the first screen can hinder the flow of raw materials on the first screen. When more raw materials are fed into the screen feed part, the smaller the angle α is, the longer the part of the baffle located on the first screen is, so that the baffle has a more obvious hindering effect on the flow of raw materials on the first screen. In this way, the flow speed of the raw materials on the first screen can be further slowed down, which is more conducive to the first screen to carry out breeding and impurity removal of the raw materials, so that the breeding and impurity removal is more sufficient; Moreover, as the first screen continuously breeds and removes impurities from the raw material, the angle α gradually decreases, so that the portion of the baffle located on the first screen gradually becomes shorter. After the vibration is applied during the breeding and impurity removal process, the alfalfa seeds in the raw material are easy to move to the lower layer of the raw material, so that the bean pods and alfalfa leaves are easy to be located on the upper layer of the raw material, and the alfalfa seeds are located on the lower layer of the raw material. Because the portion of the baffle located on the first screen becomes shorter, the blocking effect of the baffle on the upper layer of the raw material can be reduced, so that the upper layer of the raw material flows toward the screen outlet, and the breeding and impurity removal effect of screening out the bean pods and alfalfa leaves from the alfalfa seeds is further improved. At the same time, in the process of feeding the raw materials into the screen feeding part, a large amount of raw materials can be fed at one time, so as to achieve the purpose of breeding and removing impurities for a large amount of alfalfa seeds mixed with impurities at the same time, and there is no need to continuously feed the raw materials to the screen feeding part through the feeding device, so as to avoid the situation that the feed pipe is blocked during the continuous feeding of the raw materials, and the staff does not need to control the feeding flow rate, and the screen assembly can automatically adjust the inclination of the first screen according to the weight of the raw materials fed at a single time, so as to adjust the flow speed of the raw materials on the first screen, so as to further reduce the work intensity of the staff, and is more conducive to breeding and removing impurities for alfalfa seeds; 2. Further, a baffle group is arranged on the screen seat, and the middle section of the baffle is arranged in an arc shape, so that when the first screen is not loaded with raw materials, the middle section of the baffle is located on the first screen, and after the raw materials are fed into the screen feed part, the load of the elastic component increases, so that the angle α decreases, and the first arc segment can pass through the through hole to move downwardly of the first screen, or the first arc segment and the second arc segment can pass through the through hole in sequence to move downwardly of the first screen. During the movement of the middle section of the baffle, the distance between the upper sections of the two baffles in the baffle group decreases, or the distance between the upper sections of the two baffles decreases first. After the first screen is opened, the angle α is gradually increased, and the first arc segment moves relative to the through hole, thereby changing the distance between the two upper sections of the baffle bars in the baffle bar group. On the one hand, the upper section of the baffle bar with changed position can stir the raw materials on the first screen, which is more conducive to the alfalfa seeds mixed in the bean pods or alfalfa leaves flowing to the lower layer of the raw materials, and is more conducive to the breeding and impurity removal of alfalfa seeds; on the other hand, the upper section of the baffle bar with changed position can stir the raw materials on the first screen, which is more conducive to the alfalfa seeds mixed in the bean pods or alfalfa leaves flowing to the lower layer of the raw materials, and is more conducive to the breeding and impurity removal of alfalfa seeds; On the one hand, after a plurality of baffle groups are provided, in the process of gradually increasing the included angle α, the first arc segment passes through the through hole and moves toward the top of the first screen, or the second arc segment and the first arc segment pass through the through hole in sequence and move toward the top of the first screen, and in the process of the first arc segment passing through the through hole and moving toward the top of the first screen, the distance between the two upper sections of the baffle bars in the baffle group increases, or, in the process of the second arc segment and the first arc segment pass through the through hole in sequence and move toward the top of the first screen, the distance between the two upper sections of the baffle bars in the baffle group first decreases and then increases, and in the process of the two upper sections of the baffle bars in the baffle group When the distance between the upper sections of the baffle bars increases, there is a situation where the distance between the upper sections of two baffle bars in the adjacent baffle bar groups decreases. In this way, when the distance between the two upper sections of the baffle bars decreases, there is a situation where the two upper sections of the baffle bars with the reduced distance clamp the bean pods or alfalfa leaves. With the vibration during the breeding and weeding process, it is more conducive for the upper sections of the baffle bars to drive the clamped bean pods or alfalfa leaves to vibrate, thereby facilitating the vibration of alfalfa seeds mixed in the bean pods or alfalfa leaves, further facilitating the separation of alfalfa seeds from the bean pods or alfalfa leaves, and further improving the breeding and weeding effect of alfalfa seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of one embodiment of a seed grading device for alfalfa hybrid breeding in the present application; Figure 2 This is a schematic structural diagram of a screen assembly installed on a frame in one embodiment of a seed grading device for alfalfa hybrid breeding in the present application; Figure 3 This is a schematic diagram of the structure of the elastic component in one embodiment of a seed grading device for alfalfa hybrid breeding in the present application; Figure 4This is a schematic diagram of the structure of the first screen in one embodiment of a seed grading device for alfalfa hybrid breeding of the present application; Figure 5 This is a schematic structural diagram of the connection between the first screen and the screen seat in one embodiment of a seed grading device for alfalfa hybrid breeding of the present application; Figure 6 This is a schematic diagram of the structure of the baffle bar when the middle section of the baffle bar is in an arc shape in one embodiment of the seed grading device for alfalfa hybrid breeding of the present application; Figure 7 This is a structural schematic diagram of another perspective of one embodiment of a seed grading device for alfalfa hybrid breeding of the present application; Markings in the figure: 1-screen assembly, 2-screen seat, 3-first screen, 4-screen feed part, 5-screen discharge part, 6-elastic component, 7-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 member, 16-movable groove, 17-bar group, 18-bar middle section, 19-bar upper section, 20-bar lower section, 21-first arc segment, 22-second arc segment, 23-second screen, 24-base, 25-slot, 26-block, 27-enclosing plate, 28-vibration assembly, 29-first bottom plate, 30-second bottom plate, 31-driving motor, 32-slide, 33-second spring, 34-cam. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0021] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] Example 1: This example provides a seed grading device for alfalfa hybrid breeding, see Figure 1-Figure 4 As shown, it comprises a screen assembly 1, the screen assembly 1 comprises a screen seat 2 and a first screen 3, the first screen 3 is used for seed breeding and impurity removal, one end of the first screen 3 is a screen feed part 4, and the other end is a screen discharge part 5, and the part of the first screen 3 close to the screen discharge part 5 is rotatably connected to the screen seat 2; The sieve seat 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 portion of the first sieve 3 close to the sieve feed portion 4, so that an angle α is formed between the first sieve 3 and the sieve seat 2, the first sieve 3 is provided with a through hole 8, the through hole 8 is used for the baffle 7 to penetrate, and the portion of the baffle 7 located on the first sieve 3 is used to hinder the flow of raw materials on the first sieve 3; After the raw material is fed into the screen feed part 4, the load-bearing capacity of the first screen 3 increases, which increases the load of the elastic component 6, reduces the angle α, and increases the length of the baffle 7 extending from the through hole 8 to the first screen 3.

[0026] In the present application, a portion of the first screen 3 close to the screen discharge portion 5 is rotatably connected to the screen seat 2, and the elastic component 6 supports the portion of the first screen 3 close to the screen feed portion 4. After the raw material is put into the screen feed portion 4, the raw material is a mixture of alfalfa seeds, bean pods and alfalfa leaves. After the first screen 3 is loaded with the raw material, the load of the elastic component 6 is increased, the angle α is reduced, and the slope formed by the first screen 3 is reduced. Moreover, the more raw materials are put into the screen feed portion 4 at a time, the smaller the angle α is, and the gentler the slope formed by the first screen 3 is, so that the raw material on the first screen 3 from the first screen 3 can be reduced. The speed of the flow from the high point of the first screen 3 to the low point of the first screen 3 can make the screening and impurity removal of alfalfa seeds more complete, and is more conducive to the separation of alfalfa seeds from pods and alfalfa leaves. At the same time, without increasing the raw materials, in the process of continuous breeding and impurity removal of alfalfa seeds, the load on the first screen 3 is reduced, which can reduce the load of the elastic component 6, increase the angle α, and gradually steepen the slope formed by the first screen 3. In this way, the breeding and impurity removal speed of the raw materials can be appropriately increased as the breeding and impurity removal process continues, thereby improving the breeding and impurity removal efficiency, and then reducing the amount of impurities in the seeds, which is more conducive to alfalfa hybrid breeding; At the same time, by setting the baffle 7, the part of the baffle 7 located on the first screen 3 can hinder the flow of raw materials on the first screen 3. When more raw materials are put into the screen feed part 4, the smaller the angle α is, the longer the part of the baffle 7 located on the first screen 3 is, so that the baffle 7 has a more obvious hindering effect on the flow of raw materials on the first screen 3. In this way, the flow speed of the raw materials on the first screen 3 can be further slowed down, which is more conducive to the first screen 3 to carry out breeding and impurity removal of the raw materials, so that the breeding and impurity removal is more sufficient; Moreover, as the first screen 3 continuously breeds and removes impurities from the raw material, the angle α gradually decreases, so that the portion of the baffle 7 located on the first screen 3 gradually becomes shorter. After the vibration is applied during the breeding and impurity removal process, the alfalfa seeds in the raw material are easy to move to the lower layer of the raw material, which makes it easy 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 of the raw material. 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 the raw material can be reduced, so that the upper layer of the raw material can flow toward the screen outlet 5 more easily, and the breeding and impurity removal effect of screening out the pods and alfalfa leaves from the alfalfa seeds is further improved. At the same time, in the process of feeding the raw materials into the screen feed part 4, a large amount of raw materials can be fed at one time, so as to achieve the purpose of breeding and removing impurities for a large amount of alfalfa seeds mixed with impurities at the same time. There is no need to continuously feed the screen feed part 4 through the feeding device, so as to avoid the blockage of the feed pipe during the continuous feeding of the raw materials, and the staff does not need to control the feeding flow rate. The screen assembly 1 can adjust the inclination of the first screen 3 according to the weight of the raw materials fed in a single time, so as to adjust the flow rate of the raw materials on the first screen 3, so as to further reduce the work intensity of the staff and be more conducive to breeding and removing impurities for alfalfa seeds.

[0027] As a preferred embodiment, on the basis of the above-mentioned manner, further, the elastic component 6 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 seat 2, and the other end is used to support the first screen 3, and the telescopic sleeve 9 includes a plurality of sub-sleeves 12, and the plurality of sub-sleeves 12 are arranged in a sleeve so that the telescopic sleeve 9 can be telescoped; The sub-sleeve 12 on the telescopic sleeve 9 used to be connected to the screen seat 2 is the first sub-sleeve 13, and the sub-sleeve 12 on the telescopic sleeve 9 used to support the first screen 3 is the second sub-sleeve 14. The base 11 is arranged in the first sub-sleeve 13, and the first spring 10 is arranged in 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 along the length direction of the first sub-sleeve 13 is adjustable.

[0028] Furthermore, by setting a plurality of sub-sleeves 12 and a base 11 of 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 in the elastic component 6 in the initial state or the length of the telescopic sleeve 9 can be adjusted. The elastic component 6 in the initial state in the present application refers to the elastic component 6 when the elastic component 6 supports the first screen 3 and the first screen 3 is not loaded, so as to facilitate the adjustment of the relationship between the weight of the raw material input into the screen feed part 4 and the degree of change of the angle α, thereby further improving the convenience of adjusting the flow velocity of the raw material on the first screen 3, and improving the flexibility of the device of the present application in breeding and removing impurities from alfalfa seeds.

[0029] As a preferred embodiment, on the basis of the above-mentioned manner, further, the elastic component 6 also includes a locking piece 15, and a movable groove 16 is provided on the side wall of the first sub-sleeve 13. The locking piece 15 passes through the movable groove 16 and is threadedly connected with the base 11. By rotating the locking piece 15 relative to the base 11, the locking piece 15 and the outer wall of the first sub-sleeve 13 are abutted against or released from the abutment, so that the base 11 is fixed relative to the first sub-sleeve 13 or movable relative to the first sub-sleeve 13.

[0030] Furthermore, by providing a locking piece 15, the locking piece 15 is threadedly connected to the base 11 after passing through the movable groove 16, so that the locking piece 15 can be rotated relative to the base 11 to make the locking piece 15 and the outer wall of the first sub-sleeve 13 abut or release the abutment. When the locking piece 15 and the outer wall of the first sub-sleeve 13 abut, the base 11 is fixed relative to the first sub-sleeve 13. When the abutment between the locking piece 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. In this way, the convenience of adjusting the position of the base 11 is improved.

[0031] Example 2: Based on the technical solution of Example 1, further, see Figure 1 , Figure 3 and Figure 5 As shown, a baffle group 17 is provided on the sieve seat 2, and the baffle group 17 includes two baffles 7, a single baffle 7 is adapted to a single through hole 8, and the middle section of the baffle 7 is a baffle middle section 18, and the baffle middle section 18 is in an arc shape; The upper section of the baffle bar 7 is the baffle bar upper section 19, and the lower section of the baffle bar 7 is the baffle bar lower section 20. The baffle bar lower section 20 is elastic so that the baffle bar lower section 20 can bend after being subjected to force. The baffle middle section 18 includes a first arc section 21 and a second arc section 22. When the first screen 3 does not carry raw materials, the baffle middle section 18 is located on the first screen 3. When the angle α gradually decreases, the baffle middle section 18 gradually moves toward the bottom of the first screen 3, so that the first arc section 21 and the second arc section 22 pass through the through hole 8 in sequence. In the process of the first arc section 21 passing through the through hole 8, the distance between the baffle upper sections 19 on the two baffles 7 in the baffle group 17 gradually decreases. In the process of the second arc section 22 passing through the through hole 8, the distance between the baffle upper sections 19 on the two baffles 7 in the baffle group 17 gradually increases.

[0032] As a preferred implementation, on the basis of the above-mentioned implementation, further, a plurality of baffle bar groups 17 are provided on the sieve seat 2 , and the plurality of baffle bar groups 17 are distributed along the length direction and / or width direction of the sieve seat 2 .

[0033] Furthermore, a baffle group 17 is provided on the screen seat 2, and the baffle middle section 18 is provided in an arc shape, so that when the first screen 3 is not loaded with raw materials, the baffle middle section 18 is located on the first screen 3, and after the raw materials are fed into the screen feed part 4, the load of the elastic component 6 increases, so that the angle α decreases, and the first arc segment 21 can pass through the through hole 8 to move downwardly of the first screen 3, or the first arc segment 21 and the second arc segment 22 can pass through the through hole 8 in sequence to move downwardly of the first screen 3. During the movement of the baffle middle section 18, the distance between the two baffle upper sections 19 in the baffle group 17 decreases, or the two baffle upper sections 19 are moved downwardly. The distance between the two upper baffle sections 19 first decreases and then increases, and the lower baffle section 20 is adaptively bent. In the subsequent breeding and impurity removal process, the alfalfa seeds are gradually removed by breeding and impurities. Under the premise of not adding materials, the carrying capacity of the first screen 3 is reduced, so that the angle α is gradually increased, so that the first arc section 21 moves relative to the through hole 8, and then the distance between the two upper baffle sections 19 in the baffle group 17 changes. On the one hand, the upper baffle section 19 with a changed position can stir the raw materials on the first screen 3, which is more conducive to the alfalfa seeds mixed in the bean pods or alfalfa leaves to flow to the lower layer of the raw materials, which is more conducive to the breeding and impurity removal of alfalfa seeds; on the other hand, On the other hand, after a plurality of baffle groups 17 are provided, in the process of gradually increasing the included angle α, the first arc segment 21 passes through the through hole 8 to move above the first screen 3, or the second arc segment 22 and the first arc segment 21 pass through the through hole 8 to move above the first screen 3 in sequence, and in the process of the first arc segment 21 passing through the through hole 8 to move above the first screen 3, the distance between the two baffle upper segments 19 in the baffle group 17 increases, or, in the process of the second arc segment 22 and the first arc segment 21 pass through the through hole 8 to move above the first screen 3 in sequence, the distance between the two baffle upper segments 19 in the baffle group 17 first decreases and then increases, When the distance between two baffle upper sections 19 in a baffle group 17 increases, there is a situation where the distance between two baffle upper sections 19 in an adjacent baffle group 17 decreases. In this way, when the distance between the two baffle upper sections 19 decreases, there is a situation where the two baffle upper sections 19 with a reduced distance clamp the bean pods or alfalfa leaves. With the vibration during the breeding and weeding process, it is more conducive for the baffle upper sections 19 to drive the clamped bean pods or alfalfa leaves to vibrate, thereby facilitating the vibration of alfalfa seeds mixed in the bean pods or alfalfa leaves, further facilitating the separation of alfalfa seeds from the bean pods or alfalfa leaves, and further improving the breeding and weeding effect of alfalfa seeds.

[0034] As a preferred embodiment, based on the above manner, further, when the first screen 3 does not carry raw materials and the telescopic sleeve 9 supports the first screen 3 , the upper end of the blocking bar 7 is located in the through hole 8 .

[0035] Furthermore, when the first screen 3 does not carry any raw material and the telescopic sleeve 9 supports the first screen 3 , the upper end of the blocking bar 7 is located in the through hole 8 , thereby improving the stability of the matching between the blocking bar 7 and the through hole 8 .

[0036] Embodiment 3: Based on the technical solution of Embodiment 1 or Embodiment 2, further, see Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the sieve seat 2 includes a second sieve 23 , and the sieve hole diameter of the second sieve 23 is smaller than the sieve hole diameter of the first sieve 3 .

[0037] Furthermore, by setting a second sieve 23, the mesh diameter of the second sieve 23 is smaller than the mesh diameter of the first sieve 3, so that the alfalfa seeds bred and cleaned from the first sieve 3 can be bred and cleaned again, so as to further improve the breeding and cleaning effect of the alfalfa seeds; At the same time, a second screen 23 unit is arranged on the second screen 23, and the second screen 23 unit is detachably arranged on the second screen 23. The second screen 23 unit has a plurality of different models, that is, different models correspond to different sieve hole diameters on the second screen 23 unit. When selecting second screen 23 units of different models, seeds of different diameters can be bred and impurities removed, thereby improving the flexibility of seed breeding and impurity removal. It is not only suitable for breeding and impurity removal of alfalfa seeds, but also for breeding and impurity removal of other seeds. The second screen 23 unit can be fixed on the second screen 23 by means of snap-fit ​​or threaded connection. The specific fixing method is the existing technology, so it will not be repeated here.

[0038] As a preferred embodiment, on the basis of the above method, further, the sieve seat 2 also includes a base 24, the second sieve 23 is arranged on the base 24, the base 24 is provided with a slot 25, the first sieve 3 is provided with a block 26, the block 26 is stuck in the slot 25, so that the first sieve 3 is rotatably connected to the sieve seat 2; and the block 26 can be separated from the slot 25.

[0039] Furthermore, by arranging a block 26 on the first sieve 3, the block 26 is stuck in the slot 25, and the first sieve 3 is rotatably connected to the sieve seat 2, so that the first sieve 3 can be rotated relative to the sieve seat 2, thereby facilitating the change of the inclination of the first sieve 3. At the same time, the block 26 can be separated from the slot 25, so that the first sieve 3 is separated from the base 24, thereby facilitating the replacement of the first sieve 3, and then replacing the sieve hole diameter on the first sieve 3, so that the device of the present application can also be used for breeding and removing impurities for other seeds.

[0040] As a preferred embodiment, on the basis of the above-mentioned manner, further, a baffle 27 is provided on the first screen 3 and / or the second screen 23, and the baffle 27 is used to prevent the material on the corresponding first screen 3 or second screen 23 from spilling out.

[0041] As a preferred embodiment, on the basis of the above-mentioned manner, further, the seed grading device for alfalfa hybrid breeding also includes a vibration component 28, the vibration component 28 includes a first bottom plate 29, a second bottom plate 30 and a drive motor 31, the first bottom plate 29 is provided with a slide groove 32, the second bottom plate 30 is stuck in the slide groove 32, so that the second bottom plate 30 can move relative to the first bottom plate 29 along the length direction of the slide groove 32, the drive motor 31 is arranged on the first bottom plate 29, and the drive motor 31 is used to drive the second bottom plate 30 to reciprocate along the length direction of the slide groove 32; The screen assembly 1 is disposed on the second bottom plate 30 , and when the driving assembly drives the second bottom plate 30 to reciprocate along the length direction of the slide slot 32 , the screen assembly 1 vibrates in the horizontal direction.

[0042] Furthermore, by providing a vibration assembly 28, the second bottom plate 30 is driven to reciprocate along the length direction of the slide slot 32, thereby driving the screen assembly 1 to vibrate in the horizontal direction, which is further beneficial to the breeding and impurity removal of alfalfa seeds on the first screen 3; At the same time, a second spring 33 is arranged 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, and a cam 34 is arranged on the output shaft of the driving motor 31, and the outer surface of the cam 34 is used to contact the second base plate 30, and the driving 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 make the elastic force of the second spring 33 change. The second spring 33 provides elastic force to reset the second base plate 30. In this way, when the cam 34 is driven by the driving motor 31 to rotate, the second base plate 30 is reciprocated relative to the first base plate 29 along the direction of the slide groove 32.

[0043] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A seed grading device for alfalfa hybrid breeding, characterized in that: The invention comprises a screen assembly, wherein the screen assembly comprises a screen seat and a first screen, wherein the first screen is used for seed breeding and impurity removal, wherein one end of the first screen is a screen feed portion, and the other end is a screen discharge portion, and a portion of the first screen close to the screen discharge portion is rotatably connected to the screen seat; The sieve seat is provided with an elastic component and a baffle, the elastic component is used to provide elastic force to support the portion of the first sieve close to the sieve feed portion, so that an angle α is formed between the first sieve and the sieve seat, the first sieve is provided with a through hole, the through hole is used for the baffle to penetrate, and the portion of the baffle located on the first sieve is used to hinder the flow of raw materials on the first sieve; After the raw material is fed into the screen feed part, the load-bearing capacity of the first screen increases, which increases the load of the elastic component, reduces the angle α, and increases the length of the baffle extending from the through hole to the first screen.

2. The seed grading device for alfalfa hybrid breeding according to 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 seat, and the other end is used to support the first screen, the telescopic sleeve includes a plurality of sub-sleeves, and the plurality of sub-sleeves are sleeved to enable the telescopic sleeve to be telescopic; The sub-sleeve on the telescopic sleeve used to be connected to the screen seat is the first sub-sleeve, and the sub-sleeve on the telescopic sleeve used to support the first screen is the second sub-sleeve. The base is arranged in the first sub-sleeve, and the first spring is arranged in 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 direction of the first sub-sleeve is adjustable.

3. The seed grading device for alfalfa hybrid breeding according to claim 2, characterized in that: The elastic component also includes a locking piece. A movable groove is provided on the side wall of the first sub-sleeve. The locking piece passes through the movable groove and is threadedly connected to the base. The locking piece is rotated relative to the base to make the locking piece and the outer wall of the first sub-sleeve abut or release the abutment, 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 according to claim 3, characterized in that: The screen seat is provided with a baffle group, the baffle group includes two baffles, a single 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 in an arc shape; The upper section of the baffle is the upper section of the baffle, and the lower section of the baffle is the lower section of the baffle. The lower section of the baffle is elastic so that the lower section of the baffle can bend after being subjected to force. The middle section of the baffle bar includes a first arc section and a second arc section. When the first screen does not carry raw materials, the middle section of the baffle bar is located on the first screen. When the angle α gradually decreases, the middle section of the baffle bar gradually moves toward the bottom of the first screen, so that the first arc section and the second arc section pass through the through hole in sequence. In the process of the first arc section 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. In the process of the second arc section 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.

5. The seed grading device for alfalfa hybrid breeding according to claim 4, characterized in that: The sieve seat is provided with a plurality of baffle bar groups, and the plurality of baffle bar groups are distributed along the length direction and / or width direction of the sieve seat.

6. The seed grading device for alfalfa hybrid breeding according to claim 5, characterized in that: When the first screen does not carry any raw material and the telescopic sleeve supports the first screen, the upper end of the blocking bar is located in the through hole.

7. The seed grading device for alfalfa hybrid breeding according to claim 6, characterized in that: The sieve seat includes a second sieve, and the diameter of the sieve holes of the second sieve is smaller than the diameter of the sieve holes of the first sieve.

8. The seed grading device for alfalfa hybrid breeding according to claim 7, characterized in that: The sieve seat also includes a base, the second sieve is arranged on the base, the base is provided with a slot, the first sieve is provided with a block, the block is stuck in the slot, so that the first sieve is rotatably connected to the sieve seat; and the block can be separated from the slot.

9. The seed grading device for alfalfa hybrid breeding according to claim 8, characterized in that: The first screen and / or the second screen is provided with a baffle, and the baffle is used to prevent the material on the corresponding first screen or second screen from spilling out.

10. The alfalfa hybrid seed selection and grading device according to any one of claims 1 to 9, characterized in that: The alfalfa hybrid breeding seed grading device also includes a vibration assembly, the vibration assembly includes a first bottom plate, a second bottom plate and a drive motor, the first bottom plate is provided with a slide groove, the second bottom plate is clamped in the slide groove, so that the second bottom plate can move relative to the first bottom plate along the length direction of the slide groove, the drive motor is provided on the first bottom plate, and the drive motor is used to drive the second bottom plate to reciprocate along the length direction of the slide groove; The screen assembly is arranged on the second bottom plate, and when the driving assembly drives the second bottom plate to reciprocate along the length direction of the slide slot, the screen assembly vibrates in the horizontal direction.

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