Seed selection device and method for wheat breeding

Abstract

The invention relates to the field of hydraulic seed selection, in particular to a seed selection device and method for wheat breeding. The preliminary separation unit comprises a water separation assembly arranged on the supporting frame; the conveying unit comprises a supporting shaft arranged on the supporting frame, a transmission rolling shaft arranged on the supporting shaft, a conveying belt arranged on the transmission rolling shaft, a scraping strip arranged on the conveying belt and leakage-proof belts arranged on the two sides of the conveying belt; and the secondary separation unit comprises an air heater arranged on the supporting frame, a fixing plate arranged on the supporting frame, a secondary seed selection assembly arranged on the supporting frame, a material receiving barrel arranged on the secondary seed selection assembly and a servo motor arranged on the secondary seed selection assembly.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic seed selection, and in particular relates to a seed selection device and method for wheat breeding. Background Art

[0002] Wheat is one of the important sources of food. High-quality wheat seeds can greatly improve wheat yield and quality. Through scientific seed selection methods, the cultivation and promotion of new varieties can be accelerated and the breeding cycle can be shortened.

[0003] Water selection is a traditional seed selection method. It mainly uses the buoyancy of water and a stirring device to make the bad seeds float up for seed selection. Through the difference in seed density, well-developed seeds have a higher density and will sink to the bottom of the water, while bad seeds such as empty grains and insect-infested grains have a lower density and will float on the water.

[0004] However, it is difficult to control the contact strength between the device and the wheat seeds. Moderate stirring can effectively separate bad seeds, but excessive or prolonged stirring can easily squeeze and damage the wheat seeds, reducing the quality of the seeds and making them difficult to preserve. Summary of the invention

[0005] In view of the problem that the contact force between the stirring device and the wheat seeds is difficult to control in the above-mentioned or prior art, moderate stirring can effectively separate bad seeds, but excessive or prolonged stirring can easily squeeze and damage the wheat seeds, reducing the seed quality and making it difficult to preserve, the present invention is proposed.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: In the first aspect, the present invention provides a seed selection device for wheat breeding, comprising a support frame; a preliminary separation unit, the preliminary separation unit comprising a water selection component arranged on the support frame; a conveying unit, the conveying unit comprising a support shaft arranged on the support frame, a transmission roller arranged on the support shaft, a conveyor belt arranged on the transmission roller, a scraper arranged on the conveyor belt, and leak-proof belts arranged on both sides of the conveyor belt; a secondary separation unit, the secondary separation unit comprising a hot air blower arranged on the support frame, a fixing plate arranged on the support frame, a secondary seed selection component arranged on the support frame, a material receiving barrel arranged on the secondary seed selection component, and a servo motor arranged on the secondary seed selection component; and a collecting unit, the collecting unit comprising a baffle arranged on one side of the support frame, a handle arranged on the baffle, a material receiving plate arranged on the handle, a side plate arranged on the material receiving plate, and a moving wheel arranged on the material receiving plate.

[0007] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, the water selection assembly comprises a water selection chamber arranged on the support frame, a first drainage pipe arranged on the water selection chamber, a second drainage pipe arranged on the water selection chamber, and a sealing baffle arranged on the water selection chamber;

[0008] The sealing partition divides the water selection chamber into a water selection chamber and a drop chamber;

[0009] The water selection component is provided with a sliding block, and the anti-leakage belt is provided with a sliding groove matching the sliding block.

[0010] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, the secondary seed selection component is located directly below the hot air blower.

[0011] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, the secondary seed selection component includes a seed selection drum arranged on the support frame, a support block arranged on the seed selection drum, and sealing plates arranged at both ends of the seed selection drum.

[0012] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, the seed selection drum includes a first drum wall arranged on the supporting frame, a second drum wall arranged on the first drum wall, a flip plate arranged on the first drum wall, a limiting sliding block arranged on the first drum wall, and a limiting sliding groove arranged on the second drum wall to cooperate with the limiting sliding block.

[0013] As a preferred solution of the seed selection device for wheat breeding of the present invention, the length of the flap is smaller than the length of the first barrel wall.

[0014] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, an annular support block is arranged on the sealing plate, an arc-shaped support groove matching the annular support block is arranged on the support block, the support block is fixedly arranged on the support frame, and multiple groups of support blocks are arranged on the sealing plate.

[0015] As a preferred embodiment of the seed selection device for wheat breeding of the present invention, one end of the material receiving barrel penetrates through and is rotatably connected to a group of the sealing plates, a fixing rod is provided on the material receiving barrel, and a connecting bolt is provided on the fixing rod to be fixedly connected to the support block, the other end of the material receiving barrel is longer than the width of the conveyor belt, and the cross-sectional area of ​​the material receiving barrel gradually decreases from the upper end to the lower end.

[0016] As a preferred solution of the seed selection device for wheat breeding of the present invention, the upper surface of the receiving plate is inclined, the side of the receiving plate close to the baffle is lower, and the upper surface of the receiving plate is provided with an arc surface, and the cross-sectional area of ​​the receiving plate gradually decreases from both sides to the middle.

[0017] In a second aspect, the present invention provides a seed selection method based on the above-mentioned seed selection device for wheat breeding, comprising the following steps, S1: adding sufficient water into the water selection bin, adding wheat seeds into the water selection bin at a uniform speed, so that some poor seeds in the wheat seeds float up, and pushing the collecting unit to the bottom of the secondary seed selection component so that the receiving plate completely receives the bottom of the seed selection drum; S2: first taking away the poor seeds floating on the water surface through the first drainage pipe, and then draining the remaining water through the second drainage pipe; S3: pulling out the sealing partition to allow the remaining wheat seeds to fall into the falling bin; S4: starting the preliminary separation unit and the secondary separation unit to perform secondary seed selection on the wheat seeds; S5: after the device is started, impurities and poor seeds are collected on the receiving plate, at this time the collecting unit is removed, and the collected impurities and poor seeds are removed, and then the collecting unit is pushed back to its original position; S6: opening the secondary seed selection component to allow good wheat seeds to fall onto the receiving plate to achieve wheat seed selection.

[0018] The beneficial effects of the seed selection device and method for wheat breeding of the present invention are as follows: the present invention preliminarily removes some bad seeds and impurities in the wheat seeds through the preliminary separation unit, and increases the toughness of the wheat seed epidermis through water, and then cooperates with a hot air blower to further remove excess water on the wheat seeds, which is convenient for the next step of seed selection, and finally further screens the wheat seeds entering the first cylinder wall through the cooperation of the first cylinder wall, the second cylinder wall, and the flip plate, and the bottom wheat seeds are turned up by the flip plate in cooperation with the rotation of the first cylinder wall, so that the upper wheat seeds are fully in contact with the first cylinder wall. In this way, while removing bad seeds, it is also possible to avoid damage to the wheat seeds, thereby ensuring the quality of the wheat seeds and making the selected wheat seeds more conducive to storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side view structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic cross-sectional structure diagram of the water selection chamber of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the conveying unit of the present invention;

[0023] Figure 5For the present invention Figure 2 A magnified view of the structure at center;

[0024] Figure 6 It is a structural schematic diagram of the secondary separation unit of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the secondary seed selection assembly of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the support block of the present invention;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the sealing plate of the present invention;

[0028] Fig.10 For the present invention Fig. 9 A magnified view of the structure at B in the middle;

[0029] Fig.11 It is a schematic diagram of the structure of the collecting unit of the present invention.

[0030] In the figure: 100, support frame; 200, primary separation unit; 201, water selection assembly; 201a, water selection chamber; 201a-1, water selection bin; 201a-2, drop bin; a, sliding block; 201b, first drain pipe; 201c, second drain pipe; 201d, sealing partition; 202, support foot; 203, fixing bolt; 300, conveying unit; 301, support shaft; 302, transmission roller; 303, conveying belt; 304, scraper; b, sliding groove; 305, leakproof belt; 400, secondary separation unit; 401, hot air blower; 402, fixing plate; 40 3. Secondary seed selection assembly; 403a. Seed selection drum; 403a-1. First drum wall; 403a-2. Second drum wall; 403a-3. Flip plate; 403a-4. Limit slider; 403a-5. Limit slide groove; 403b. Support block; 403b-1. Arc support groove; 403c. Closing plate; 403c-1. Ring support block; 404. Material receiving drum; 404a. Fixing rod; 404b. Connecting bolt; 405. Servo motor; 500. Collecting unit; 501. Baffle; 502. Handle; 503. Material receiving plate; 504. Side plate; 505. Moving wheel. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Example 1, reference Figure 1-Figure 11 , which is the first embodiment of the present invention, provides a seed selection device for wheat breeding, which includes a support frame 100 for supporting the device;

[0033] The preliminary separation unit 200 includes a water selection component 201 disposed on the support frame 100, which is used to perform preliminary seed selection on the wheat seeds. A water pipe is disposed on the upper part of the water selection component 201 to inject water into the water selection component 201, a support foot 202 is disposed on the water selection component 201 to support the water selection component 201 on the support frame 100, and a fixing bolt 203 is disposed on the support foot 202 to fix the position of the support foot 202;

[0034] The conveying unit 300 includes a support shaft 301 rotatably arranged on the support frame 100, the support shaft 301 is driven to rotate by a motor, a transmission roller 302 arranged on the support shaft 301, and a conveyor belt 303 arranged on the transmission roller 302, the transmission roller 302 is used to support and transmit the conveyor belt 303, and the conveyor belt 303 is driven to transmit by the rotation of the support shaft 301, the conveyor belt 303 is used to transport the wheat seeds dropped from the water selection component 201, the conveyor belt 303 is evenly distributed with electric heating wires for heating the wheat seeds on the conveyor belt 303 for dehydrating, a scraping strip 304 arranged on the conveyor belt 303 for scraping the wheat seeds dropped from the water selection component 201 to evenly spread the wheat seeds, and leak-proof belts 305 arranged on both sides of the conveyor belt 303 for closing the gap between the two sides of the conveyor belt 303 and the bottom of the water selection component 201 to prevent the wheat seeds from spilling;

[0035] The secondary separation unit 400 includes a hot air blower 401 disposed on the support frame 100, which is used to generate hot air, further dehydrate the wheat seeds dropped from the conveyor belt 303, and further remove the light impurities remaining in the wheat seeds, a fixed plate 402 disposed on the support frame 100, which is used to support the hot air blower 401, a secondary seed selection component 403 disposed on the support frame 100, which is used to further remove smaller bad seeds from the wheat seeds, a receiving barrel 404 disposed on the secondary seed selection component 403, and a servo motor 405 disposed on the secondary seed selection component 403, which is used to drive the secondary seed selection component 403 to move, and the servo motor 405 is fixedly disposed on the support frame 100;

[0036] And, the collecting unit 500 includes a baffle 501 arranged on one side of the supporting frame 100, for receiving impurities blown out by the hot air blower 401, a handle 502 arranged on the baffle 501, a receiving plate 503 arranged on the handle 502, for collecting bad seeds and good seeds after selection, a side plate 504 arranged on the receiving plate 503, for cooperating with the receiving plate 503 to play a gathering role and prevent the collected seeds from being spilled, and a moving wheel 505 arranged on the receiving plate 503, for cooperating with the handle 502 to drive the entire collecting unit 500 to move.

[0037] The water selection assembly 201 includes a water selection chamber 201a disposed on the support frame 100, a first drainage pipe 201b for supporting and disposed on the water selection chamber 201a, used to carry away floating objects on the water surface through water flow, a second drainage pipe 201c disposed on the water selection chamber 201a, used to discharge the remaining water, and a sealing baffle 201d disposed on the water selection chamber 201a, used to separate the internal space of the water selection chamber 201a, and a sealing ring is disposed on the outer side of the sealing baffle 201d, used to improve the sealing between the inner wall of the water selection chamber 201a and the sealing baffle 201d;

[0038] The sealing partition 201d divides the interior of the water selection chamber 201a into a water selection chamber 201a-1 and a drop chamber 201a-2. The water selection chamber 201a-1 is used to hold water to perform hydraulic seed selection on the added wheat seeds, so that some bad seeds and impurities float to the water surface and are separated from the wheat seeds.

[0039] A sliding block a is provided on the water selection component 201, and a sliding groove b cooperating with the sliding block a is provided on the leakage prevention belt 305. The cooperation between the sliding block a and the sliding groove b improves the stability of the connection between the leakage prevention belt 305 and the bottom of the water selection chamber 201a when the conveyor belt 303 is transmitted, thereby preventing wheat seeds from spilling.

[0040] Among them, the upper surface of the receiving plate 503 is inclined, the side of the receiving plate 503 close to the baffle 501 is lower, and the upper surface of the receiving plate 503 is provided with an arc surface. The cross-sectional area of ​​the receiving plate 503 gradually decreases from both sides to the middle. In this way, in conjunction with the side plate 504, the selected seeds and bad seeds can be better gathered.

[0041] In summary, firstly, enough water is added to the water selection component 201, and then the wheat seeds to be selected are put into the water selection component 201. At this time, some impurities and bad seeds in the wheat seeds float to the water surface through the buoyancy of the water. At this time, the floating objects on the water surface are discharged together with the water through the water selection component 201, and the wheat seeds preliminarily processed by the water selection component 201 fall on the conveyor belt 303. At this time, the conveyor belt 303 is started for transmission, and the wheat seeds are transported in cooperation with the scraper 304. During the process, the conveyor belt 303 evaporates the water on the wheat seeds through the electric heating wire. At this time, the hot air blower 401 and the servo motor 405 are started, and the hot air blower 401 generates hot air to further dehydrate the wheat seeds falling from the conveyor belt 303, and blows down The fallen wheat seeds are removed, and the light impurities and bad seeds remaining therein are removed. At this time, the impurities and bad seeds are gathered on the receiving plate 503 through the baffle 501. At this time, the fallen seeds enter the secondary seed selection component 403 through the receiving tube 404. At this time, the secondary seed selection component 403 will further select the wheat seeds entering the secondary seed selection component 403, and the remaining small particles of bad seeds fall onto the receiving plate 503 through the secondary seed selection component 403. At this time, the entire collecting unit 500 is transferred by the moving wheel 505, and the bad seeds and impurities gathered thereon are cleaned up. At this time, the collecting unit 500 is restored to its original position, and the secondary seed selection component 403 is opened, so that the selected good seeds therein fall onto the receiving plate 503.

[0042] Example 2, reference Figure 1-Figure 10 , which is the second embodiment of the present invention, and is different from the previous embodiment in that the wheat seeds are subjected to secondary seed selection. Compared with the first embodiment, the secondary seed selection component 403 is further located directly below the hot air blower 401, and the hot air blower 401 is located at the bottom of one end of the conveyor belt 303 in the rotation direction, so that when the wheat seeds fall downward through the conveyor belt 303, they will be processed by the hot air of the hot air blower 401, and then fall into the receiving barrel 404, and enter the secondary seed selection component 403 through the receiving barrel 404.

[0043] Among them, the secondary seed selection component 403 includes a seed selection roller 403a arranged on the support frame 100, which is used to further select wheat, a support block 403b arranged on the seed selection roller 403a, and a sealing plate 403c arranged at both ends of the seed selection roller 403a, and the support block 403b is used to cooperate with the sealing plate 403c to support the seed selection roller 403a.

[0044] The seed selection drum 403a includes a first drum wall 403a-1 arranged on the support frame 100, a second drum wall 403a-2 arranged on the first drum wall 403a-1, the first drum wall 403a-1 and the second drum wall 403a-2 together form a complete drum shape, the first drum wall 403a-1 and the second drum wall 403a-2 are provided with separation holes, the size of the separation holes is smaller than the size of normal high-quality seeds, and a flip plate 403a-3 arranged on the first drum wall 403a-1 is used to cooperate with the first drum wall 403a -1 rotates to bring the bottom seeds to the top and then sprinkle them down, so that each layer of seeds can come into contact with the separation holes, and the bad seeds can be removed. The limiting slider 403a-4 is arranged on the first cylinder wall 403a-1, and the limiting groove 403a-5 is arranged on the second cylinder wall 403a-2 to cooperate with the limiting slider 403a-4. The limiting slider 403a-4 and the limiting groove 403a-5 cooperate to enable the second cylinder wall 403a-2 to be quickly connected to the first cylinder wall 403a-1, thereby controlling the outflow of internal seeds.

[0045] The length of the flip plate 403a-3 is smaller than the length of the first cylinder wall 403a-1, so that the seeds can be prevented from remaining on the flip plate 403a-3 and residues can be avoided.

[0046] Among them, an annular support block 403c-1 is arranged on the sealing plate 403c, and an arc-shaped support groove 403b-1 cooperating with the annular support block 403c-1 is arranged on the support block 403b, and the support block 403b is fixedly arranged on the support frame 100. A plurality of support blocks 403b are arranged on the sealing plate 403c, and the arc-shaped support groove 403b-1 cooperates with the annular support block 403c-1 to realize supporting the seed selection roller 403a while not affecting the rotation of the seed selection roller 403a.

[0047] Among them, one end of the material receiving barrel 404 passes through and is rotatably connected to a group of sealing plates 403c, a fixing rod 404a is provided on the material receiving barrel 404, and a connecting bolt 404b is provided on the fixing rod 404a to be fixedly connected with the support block 403b. The fixing rod 404a and the connecting bolt 404b cooperate to fix the position of the material receiving barrel 404, and the other end of the material receiving barrel 404 is longer than the width of the conveyor belt 303. The cross-sectional area of ​​the material receiving barrel 404 gradually decreases from the upper end to the lower end, so that the seeds fallen on the conveyor belt 303 can be gathered to avoid spilling.

[0048] The rest of the structure is the same as that of Example 1.

[0049] In summary, when the conveyor belt 303 cooperates with the scraper 304 to drive the wheat seeds forward, the wheat seeds that have been transported to the end fall down. At this time, the falling wheat seeds pass through the hot air flow generated by the hot air blower 401, which further removes the water on the wheat seeds and separates some impurities. The remaining seeds fall into the receiving barrel 404 through the hot air flow and enter the seed selection drum 403a. At this time, the first barrel wall 403a-1 and the second barrel wall 403a-2 rotate to cooperate with the flip plate 403a-3 to select the wheat seeds therein. After the seed selection is completed, the collecting unit 500 is removed, and the impurities and bad seeds collected thereon are cleaned up, and then the collecting unit 500 is restored to its original position. At this time, the second cylinder wall 403a-2 is opened, so that the selected wheat seeds flow out from the gap between the first cylinder wall 403a-1 and the second cylinder wall 403a-2 and fall onto the receiving plate 503. This not only retains the convenient seed selection of wheat by water selection, but also avoids the damage to the wheat seeds by repeated stirring, and protects the excellent wheat seeds from damage.

[0050] Example 3, reference Figure 1-Figure 11 , which is the second embodiment of the present invention, refer to Figure 1-Figure 11 , which is the fourth embodiment of the present invention, and provides a seed selection method for wheat breeding, which is based on any of the above-mentioned seed selection devices for wheat breeding, and includes the following steps, S1: adding sufficient water to the water selection bin 201a-1, adding wheat seeds to the water selection bin 201a-1 at a uniform speed, so that some bad seeds in the wheat seeds float up, and pushing the collecting unit 500 to the bottom of the secondary seed selection component 403, so that the receiving plate 503 completely receives the bottom of the seed selection drum 403a;

[0051] S2: First, the bad seeds floating on the water surface are taken away through the first drainage pipe 201b, and then the remaining water is discharged through the second drainage pipe 201c;

[0052] S3: Pull out the sealing partition 201d to allow the remaining wheat seeds to fall into the drop bin 201a-2;

[0053] S4: starting the primary separation unit 200 and the secondary separation unit 400 to perform secondary seed selection on the wheat seeds;

[0054] S5: After the device is started, impurities and bad seeds are collected on the receiving plate 503. At this time, the collecting unit 500 is removed, and the collected impurities and bad seeds are removed, and then the collecting unit 500 is pushed back to its original position;

[0055] S6: Open the secondary seed selection component 403 to allow the high-quality wheat seeds to fall onto the receiving plate 503, thereby achieving the selection of wheat seeds.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seed selection device for wheat breeding, characterized in that: comprising, a support frame (100); A preliminary separation unit (200), the preliminary separation unit (200) comprising a water separation component (201) arranged on the supporting frame (100); A conveying unit (300), the conveying unit (300) comprising a support shaft (301) arranged on the support frame (100), a transmission roller (302) arranged on the support shaft (301), a conveying belt (303) arranged on the transmission roller (302), a scraper (304) arranged on the conveying belt (303), and anti-leakage belts (305) arranged on both sides of the conveying belt (303); A secondary separation unit (400), the secondary separation unit (400) comprising a hot air blower (401) arranged on the support frame (100), a fixing plate (402) arranged on the support frame (100), a secondary seed selection component (403) arranged on the support frame (100), a material receiving barrel (404) arranged on the secondary seed selection component (403), and a servo motor (405) arranged on the secondary seed selection component (403); And, a collecting unit (500), the collecting unit (500) comprising a baffle (501) arranged on one side of the supporting frame (100), a handle (502) arranged on the baffle (501), a receiving plate (503) arranged on the handle (502), a side plate (504) arranged on the receiving plate (503), and a moving wheel (505) arranged on the receiving plate (503).

2. The seed selection device for wheat breeding according to claim 1, characterized in that: The water selection component (201) comprises a water selection chamber (201a) arranged on the support frame (100), a first drainage pipe (201b) arranged on the water selection chamber (201a), a second drainage pipe (201c) arranged on the water selection chamber (201a), and a sealing baffle (201d) arranged on the water selection chamber (201a); The sealing partition (201d) divides the interior of the water selection chamber (201a) into a water selection chamber (201a-1) and a drop chamber (201a-2); The water selection component (201) is provided with a sliding block (a), and the anti-leakage belt (305) is provided with a sliding groove (b) matching the sliding block (a).

3. The seed selection device for wheat breeding according to claim 2, characterized in that: The secondary seed selection component (403) is located directly below the hot air blower (401).

4. The seed selection device for wheat breeding according to claim 3, characterized in that: The secondary seed selection component (403) includes a seed selection roller (403a) arranged on the support frame (100), a support block (403b) arranged on the seed selection roller (403a), and sealing plates (403c) arranged at both ends of the seed selection roller (403a).

5. The seed selection device for wheat breeding according to claim 4, characterized in that: The seed selection roller (403a) includes a first cylinder wall (403a-1) arranged on the support frame (100), a second cylinder wall (403a-2) arranged on the first cylinder wall (403a-1), a flip plate (403a-3) arranged on the first cylinder wall (403a-1), a limiting slider (403a-4) arranged on the first cylinder wall (403a-1), and a limiting slide groove (403a-5) arranged on the second cylinder wall (403a-2) and cooperating with the limiting slider (403a-4).

6. The seed selection device for wheat breeding according to claim 5, characterized in that: The length of the flap (403a-3) is smaller than the length of the first cylinder wall (403a-1).

7. The seed selection device for wheat breeding according to claim 6, characterized in that: The sealing plate (403c) is provided with an annular support block (403c-1), the support block (403b) is provided with an arc-shaped support groove (403b-1) matching the annular support block (403c-1), the support block (403b) is fixedly arranged on the support frame (100), and a plurality of groups of the support blocks (403b) are arranged on the sealing plate (403c).

8. The seed selection device for wheat breeding according to claim 7, characterized in that: One end of the material receiving barrel (404) passes through and is rotatably connected to a group of the sealing plates (403c), a fixing rod (404a) is provided on the material receiving barrel (404), and a connecting bolt (404b) is provided on the fixing rod (404a) and fixedly connected to the supporting block (403b), the other end of the material receiving barrel (404) is longer than the width of the conveyor belt (303), and the cross-sectional area of ​​the material receiving barrel (404) gradually decreases from the upper end to the lower end.

9. The seed selection device for wheat breeding according to claim 8, characterized in that: The upper surface of the receiving plate (503) is arranged at an angle, the side of the receiving plate (503) close to the baffle (501) is at a lower position, and the upper surface of the receiving plate (503) is provided with an arc surface, and the cross-sectional area of ​​the receiving plate (503) gradually decreases from both sides to the middle.

10. A seed selection method for wheat breeding according to any one of claims 4 to 9, characterized in that: The steps include: S1: adding sufficient water to the water selection bin (201a-1), adding wheat seeds to the water selection bin (201a-1) at a uniform speed, so that some bad seeds in the wheat seeds float up, pushing the collecting unit (500) below the secondary seed selection component (403), so that the receiving plate (503) completely receives the bottom of the seed selection drum (403a); S2: firstly remove the bad seeds floating on the water surface through the first drainage pipe (201b), and then drain the remaining water through the second drainage pipe (201c); S3: Pull out the sealing partition (201d) to allow the remaining wheat seeds to fall into the lower bin (201a-2); S4: starting the primary separation unit (200) and the secondary separation unit (400) to perform secondary seed selection on the wheat seeds; S5: After the device is started, impurities and bad seeds are collected on the receiving plate (503), at which time the collecting unit (500) is removed, the collected impurities and bad seeds are removed, and then the collecting unit (500) is pushed back to its original position; S6: Open the secondary seed selection component (403) to allow high-quality wheat seeds to fall onto the receiving plate (503), thereby achieving the selection of wheat seeds.

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