Seed screening device

Abstract

The utility model discloses a seed screening device which comprises a first supporting frame, a first-stage screening box and a lifting driving mechanism used for driving the first-stage screening box to ascend and descend are installed on the first supporting frame, the first-stage screening box comprises annular screening plates, the radiuses of the annular screening plates are different, the annular screening plates are concentrically arranged, and the annular screening plates are arranged on the first supporting frame. And first sieve holes are uniformly distributed in the annular sieve plate. By arranging the first-stage screening box and other structures, the annular screening plate on the outermost side can be driven to move up and down in a large range on the basis of work of the driving assembly, when the annular screening plate ascends, a bowl-shaped structure is formed in the middle of the first-stage screening box, and when the annular screening plate descends, a boss-shaped structure is formed in the middle of the first-stage screening box; the annular sieve plates are matched with the annular elastic connecting parts, namely, periodic switching of the two forms is achieved, and in the process, seeds can move in the first-stage screening box in a large range, so that the screening efficiency is improved, and the hole blocking phenomenon is prevented as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of seed screening, in particular to a seed screening device. Background Art

[0002] In seed processing, screening is usually required to remove impurities or distinguish seeds of different sizes. Traditional seed screening devices use structures such as sieve plates with vibration functions. Although they can meet certain usage requirements, their vibration amplitude is usually small, the screening efficiency is low, and they are prone to blockage, so there is still room for improvement.

[0003] After searching, the Chinese patent application number 202020017039.5 discloses a vibrating screening device for agricultural seeds, including a box, a discharge port is provided at the lower end of the box, a plurality of screening plates are provided in the box, and the plurality of screening plates are arranged at an angle. A plurality of sieve holes are provided on the screening plate, and the apertures of the sieve holes on different screening plates decrease from top to bottom. A plurality of discharge ports are provided on the side wall of the box, and the discharge ports correspond to the screening plates one by one, and the discharge ports are located at the lowest end of the screening plates. A vibration mechanism for driving the screening plates to move up and down is provided at the lower end of the screening plates; the vibration mechanism includes a driving assembly provided on the box and used to drive the screening plates to move upward, and an elastic assembly provided between the screening plates and the box and used to drive the screening plates to move downward. The screening device in the above-mentioned document has the following shortcomings: although it can meet certain screening requirements, the seed movement is not intense enough through only a single vibration, which may lead to low screening efficiency, and needs to be improved. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a seed screening device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A seed screening device comprises a first support frame, a first-level screening box and a lifting drive mechanism for driving the first-level screening box to lift and lower are mounted on the first support frame, and the first-level screening box comprises:

[0007] annular sieve plates, wherein the radii of the plurality of annular sieve plates are different, the plurality of annular sieve plates are concentrically arranged, and the annular sieve plates are provided with uniformly distributed first sieve holes;

[0008] An upper center rod, the upper center rod is fixedly arranged at the center of the annular screen plate;

[0009] An annular elastic connection part, wherein a plurality of annular elastic connection parts are respectively arranged at the annular gap between two adjacent annular sieve plates, the two annular sieve plates are sealed and connected by the annular elastic connection part, the center of the annular elastic connection part coincides with the center of the annular sieve plate, and the innermost annular sieve plate is connected to the outer wall of the upper center rod through the innermost annular elastic connection part;

[0010] An annular baffle, the annular baffle being fixed to the outer circumferential wall of the outermost annular sieve plate;

[0011] A side bracket, the side bracket is fixed to the outside of the annular baffle, a guide rod is fixed to the top of the first support frame, the side bracket is slidably connected to the outer wall of the guide rod, and the side bracket is connected to the top of the first support frame through a spring;

[0012] The lifting drive mechanism comprises:

[0013] A fan frame, the fan frame is fixed on the first supporting frame;

[0014] An annular rotating frame, the annular rotating frame is rotatably mounted on the fan frame;

[0015] An annular gear rack, the annular gear rack is fixed to the top of the annular rotating frame, an annular inclined plate is fixed to the top of the annular gear rack, a ball head rod is installed on the outer side of the annular baffle through a bracket, and the bottom end of the ball head rod is slidably connected to the top surface of the annular inclined plate;

[0016] The driving assembly is arranged on one side of the annular gear rack and is used to drive the annular gear rack to rotate.

[0017] As a further solution of the utility model: the drive assembly includes:

[0018] A second support frame, the second support frame is fixed on the first support frame;

[0019] A driving motor, the driving motor is fixed on the second supporting frame;

[0020] The driving gear is connected to the output end of the driving motor in a transmission manner and is meshed with the annular gear rack.

[0021] As a further solution of the utility model: a secondary screening box is fixed inside the first support frame, the secondary screening box is a bowl-shaped structure, a fan evenly distributed is provided at the bottom of the secondary screening box, and the secondary screening box is located below the primary screening box;

[0022] A lower center rod is fixed in the middle of the secondary screening box, a connecting tube is fixed on the top of the lower center rod, and an upper center rod is fixed to the inner wall of the top end of the connecting tube.

[0023] As a further solution of the utility model: a connecting frame is fixed on the inner side of the annular rotating frame, a toggle frame is fixed on the bottom end of the connecting frame, and the toggle frame is an arc-shaped structure adapted to the inner wall of the secondary screening box.

[0024] As a further solution of the utility model: a receiving container is arranged below the secondary screening box.

[0025] As a further solution of the utility model: a base frame is fixed inside the first supporting frame, the base frame is in a U-shaped structure, and the shape of the receiving container is adapted to the base frame.

[0026] As a further solution of the utility model: a fan frame is fixed on the top of the second support frame, a fan is installed on the fan frame, and the fan is located between the primary screening box and the secondary screening box.

[0027] The beneficial effects of the utility model are:

[0028] 1. The utility model can work based on the driving component by setting up a first-level screening box and other structures, and can drive the outermost annular screen plate to move up and down in a large range. When the annular screen plate rises, a bowl-shaped structure is formed in the middle of the first-level screening box. When the annular screen plate descends, a boss-shaped structure is formed in the middle of the first-level screening box. Each annular screen plate and the annular elastic connecting part cooperate to realize the periodic switching of the two forms. During the process, the seeds will move in a large range inside the first-level screening box, thereby accelerating the screening efficiency and preventing the occurrence of hole blockage as much as possible.

[0029] 2. The utility model is capable of further screening the seeds screened by the primary screening box by providing a secondary screening box and other structures, thereby improving practicality.

[0030] 3. The utility model provides a toggle frame and other structures, which can synchronously drive the toggle frame at one end of the connecting frame to rotate based on the rotation of the annular gear frame, thereby toggling the seeds in the secondary screening box and improving the screening efficiency.

[0031] 4. The utility model can easily receive the fallen seeds by providing a receiving container, and provides a base frame to facilitate the positioning of the receiving container, thereby improving the firmness of the overall structure and the practicality.

[0032] 5. The utility model is capable of air-selecting the fallen seeds and blowing away the fallen impurities by arranging structures such as a fan, thereby improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural schematic diagram of a seed screening device proposed by the utility model;

[0034] Figure 2This is a structural schematic diagram of a seed screening device proposed by the utility model from another angle;

[0035] Figure 3 This is a structural schematic diagram of a first-level screening box of a seed screening device proposed by the utility model;

[0036] Figure 4 This is a structural schematic diagram of a lifting drive mechanism of a seed screening device proposed by the utility model;

[0037] Figure 5 This is a schematic structural diagram of a cross-section of an annular gear rack and an annular rotating rack of a seed screening device proposed by the utility model;

[0038] Figure 6 The utility model provides a schematic structural diagram of a ring-shaped inclined plate, a ring-shaped rotating frame and a toggle frame of a seed screening device.

[0039] In the figure: 1-first support frame, 2-spring, 3-annular baffle, 4-guide rod, 5-annular inclined plate, 6-receiving container, 7-base frame, 8-secondary screening box, 9-annular gear frame, 10-second support frame, 11-driving motor, 12-ball head rod, 13-first sieve hole, 14-annular elastic connecting part, 15-upper center rod, 16-annular sieve plate, 17-connecting cylinder, 18-connecting frame, 19-sliding frame, 20-lower center rod, 21-fan frame, 22-fan, 23-driving gear, 24-annular rotating frame. DETAILED DESCRIPTION

[0040] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] Example 1

[0043] A seed screening device, such as Figure 1-6 As shown, it includes a first support frame 1, on which a primary screening box and a lifting drive mechanism for driving the primary screening box to lift are installed, and the primary screening box includes:

[0044] an annular sieve plate 16, wherein the radii of the plurality of annular sieve plates 16 are different, and the plurality of annular sieve plates 16 are concentrically arranged, and the annular sieve plates 16 are provided with uniformly distributed first sieve holes 13;

[0045] An upper center rod 15, which is fixed and disposed at the center of the annular screen plate 16;

[0046] An annular elastic connection part 14, wherein a plurality of annular elastic connection parts 14 are respectively arranged at the annular gap between two adjacent annular sieve plates 16, the two annular sieve plates 16 are sealed and connected by the annular elastic connection part 14, the center of the annular elastic connection part 14 coincides with the center of the annular sieve plate 16, and the innermost annular sieve plate 16 is connected to the outer wall of the upper center rod 15 through the innermost annular elastic connection part 14;

[0047] An annular baffle 3, the annular baffle 3 is fixed to the outer circumferential outer wall of the outermost annular sieve plate 16;

[0048] Side bracket, the side bracket is fixed to the outside of the annular baffle 3, a guide rod 4 is fixed to the top of the first support frame 1, the side bracket is slidably connected to the outer wall of the guide rod 4, and the side bracket is connected to the top of the first support frame 1 through a spring 2;

[0049] The lifting drive mechanism comprises:

[0050] A fan frame 21, the fan frame 21 is fixed on the first support frame 1;

[0051] An annular rotating frame 24, the annular rotating frame 24 is rotatably mounted on the fan frame 21;

[0052] The annular gear rack 9 is fixed to the top of the annular rotating frame 24, and an annular inclined plate 5 is fixed to the top of the annular gear rack 9. A ball head rod 12 is installed on the outer side of the annular baffle plate 3 through a bracket, and the bottom end of the ball head rod 12 is slidably connected to the top surface of the annular inclined plate 5;

[0053] A driving assembly, which is arranged on one side of the annular gear rack 9 and is used to drive the annular gear rack 9 to rotate;

[0054] By setting up structures such as the first-level screening box, it is possible to work based on the driving component to drive the annular gear frame 9 to rotate, and then drive the annular inclined plate 5 to rotate. Since the annular inclined plate 5 is inclined, when the annular inclined plate 5 rotates, the ball head rod 12 slides on the top surface of the annular inclined plate 5 and performs periodic up and down movements, while driving the outermost annular sieve plate 16 to move up and down in a large range. When the outer annular sieve plate 16 moves up and down, it can pull the inner annular sieve plate 16 to move through the annular elastic connecting part 14. Since the upper center rod 15 is fixedly set, the ups and downs of each annular sieve plate 16 are also different. When the annular sieve plate 16 rises, a bowl-shaped structure is formed in the middle of the first-level screening box. When the annular sieve plate 16 descends, a boss-shaped structure is formed in the middle of the first-level screening box. Each annular sieve plate 16 cooperates with the annular elastic connecting part 14 to achieve periodic switching of the two forms. During the process, the seeds will move in a large range inside the first-level screening box, thereby accelerating the screening efficiency and preventing the occurrence of hole blockage as much as possible.

[0055] In order to facilitate the driving of the annular gear rack 9 to rotate; Figure 4 As shown, the driving component includes:

[0056] A second support frame 10, the second support frame 10 is fixed on the first support frame 1;

[0057] A driving motor 11, wherein the driving motor 11 is fixed on the second supporting frame 10;

[0058] The driving gear 23 is transmission-connected to the output end of the driving motor 11 , and the driving gear 23 is meshed with the annular gear rack 9 .

[0059] In order to facilitate further screening; Figure 1 , Figure 4 As shown, a secondary screening box 8 is fixed inside the first support frame 1. The secondary screening box 8 is a bowl-shaped structure. Evenly distributed fans 22 are provided at the bottom of the secondary screening box 8. The secondary screening box 8 is located below the primary screening box.

[0060] A lower center rod 20 is fixed in the middle of the secondary screening box 8, a connecting tube 17 is fixed on the top of the lower center rod 20, and an upper center rod 15 is fixed to the inner wall of the top end of the connecting tube 17;

[0061] By providing a structure such as a secondary screening box 8, the seeds screened by the primary screening box can be further screened, thereby improving practicality.

[0062] In order to improve the secondary screening efficiency; Figure 5 As shown, a connecting frame 18 is fixed to the inner side of the annular rotating frame 24, and a toggle frame 19 is fixed to the bottom end of the connecting frame 18. The toggle frame 19 is an arc-shaped structure adapted to the inner wall of the secondary screening box 8;

[0063] By providing structures such as the toggle frame 19, the toggle frame 19 at one end of the connecting frame 18 can be synchronously driven to rotate based on the rotation of the annular gear frame 9, thereby toggling the seeds in the secondary screening box 8 and improving the screening efficiency.

[0064] In order to facilitate the inoculation of seeds; Figure 1 As shown, a receiving container 6 is provided below the secondary screening box 8;

[0065] A bottom frame 7 is fixed inside the first support frame 1. The bottom frame 7 is a U-shaped structure, and the shape of the receiving container 6 is adapted to the bottom frame 7.

[0066] By providing the receiving container 6, it is possible to facilitate the receiving of fallen seeds, and by providing the base frame 7, it is convenient to position the receiving container 6, and the firmness of the overall structure is improved, thereby improving the practicality.

[0067] Example 2

[0068] In order to facilitate the removal of impurities, refer to Figure 2 , Figure 4 , a seed screening device, this embodiment makes the following improvements compared with embodiment 1, a fan frame 21 is fixed on the top of the second support frame 10, a fan 22 is installed on the fan frame 21, and the fan 22 is located between the primary screening box and the secondary screening box 8;

[0069] By providing structures such as the fan 22, the fallen seeds can be air-selected and the fallen impurities can be blown away, thereby improving reliability.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seed screening device, characterized in that: The invention comprises a first support frame (1), on which a primary screening box and a lifting drive mechanism for driving the primary screening box to lift are mounted, wherein the primary screening box comprises: an annular sieve plate (16), wherein the radii of the plurality of annular sieve plates (16) are different, the plurality of annular sieve plates (16) are concentrically arranged, and the annular sieve plates (16) are provided with uniformly distributed first sieve holes (13); An upper center rod (15), the upper center rod (15) is fixedly arranged at the center of the annular screen plate (16); an annular elastic connection part (14), wherein a plurality of annular elastic connection parts (14) are respectively arranged at an annular gap between two adjacent annular sieve plates (16), the two annular sieve plates (16) are sealed and connected via the annular elastic connection part (14), the center of the annular elastic connection part (14) coincides with the center of the annular sieve plate (16), and the innermost annular sieve plate (16) is connected to the outer wall of the upper center rod (15) via the innermost annular elastic connection part (14); An annular baffle (3), the annular baffle (3) being fixed to the circumferential outer wall of the outermost annular sieve plate (16); A side bracket, the side bracket is fixed to the outside of the annular baffle (3), a guide rod (4) is fixed to the top of the first support frame (1), the side bracket is slidably connected to the outer wall of the guide rod (4), and the side bracket is connected to the top of the first support frame (1) via a spring (2); The lifting drive mechanism comprises: A fan frame (21), the fan frame (21) is fixed on the first support frame (1); An annular rotating frame (24), the annular rotating frame (24) is rotatably mounted on the fan frame (21); An annular gear rack (9), the annular gear rack (9) is fixed to the top of the annular rotating frame (24), an annular inclined plate (5) is fixed to the top of the annular gear rack (9), a ball head rod (12) is installed on the outer side of the annular baffle (3) through a bracket, and the bottom end of the ball head rod (12) is slidably connected to the top surface of the annular inclined plate (5); A driving assembly is arranged on one side of the annular gear rack (9) and is used to drive the annular gear rack (9) to rotate.

2. A seed screening device according to claim 1, characterized in that: The drive assembly comprises: A second support frame (10), the second support frame (10) is fixed on the first support frame (1); A driving motor (11), wherein the driving motor (11) is fixed on the second supporting frame (10); A driving gear (23) is drivingly connected to the output end of the driving motor (11), and the driving gear (23) is meshed with the annular gear rack (9).

3. A seed screening device according to claim 2, characterized in that: A secondary screening box (8) is fixed inside the first support frame (1), the secondary screening box (8) is a bowl-shaped structure, and evenly distributed fans (22) are provided at the bottom of the secondary screening box (8), and the secondary screening box (8) is located below the primary screening box; A lower center rod (20) is fixed in the middle of the secondary screening box (8), a connecting tube (17) is fixed on the top of the lower center rod (20), and an upper center rod (15) is fixed to the inner wall of the top end of the connecting tube (17).

4. A seed screening device according to claim 3, characterized in that: A connecting frame (18) is fixed inside the annular rotating frame (24), a shifting frame (19) is fixed at the bottom end of the connecting frame (18), and the shifting frame (19) is an arc-shaped structure adapted to the inner wall of the secondary screening box (8).

5. A seed screening device according to claim 3, characterized in that: A receiving container (6) is arranged below the secondary screening box (8).

6. A seed screening device according to claim 5, characterized in that: A base frame (7) is fixed inside the first support frame (1); the base frame (7) is a U-shaped structure, and the shape of the receiving container (6) is adapted to the base frame (7).

7. A seed screening device according to claim 3, characterized in that: A fan frame (21) is fixed on the top of the second support frame (10), and a fan (22) is installed on the fan frame (21). The fan (22) is located between the primary screening box and the secondary screening box (8).

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