Agricultural seed screening device

Abstract

The utility model discloses an agricultural seed screening device, which relates to the technical field of agricultural planting and comprises a shell, a discharge port and a waste port are arranged on the side surface of the shell, a feeding mechanism for intermittently feeding seeds is arranged on the shell, and a seed screening mechanism for removing impurities and screening the seeds is arranged on the lower side of the feeding mechanism. The power mechanism is connected to the feeding mechanism and the seed screening mechanism; the feeding mechanism comprises a stock bin fixed to the upper end of the shell. The seed screening device has the beneficial effects that the feeding mechanism and the seed screening mechanism are simultaneously driven by the double-shaft motor to carry out feeding, different types of impurities can be screened out through air blowing screening and vibration screening, the impurity removal rate and the working efficiency are improved, and the controllable feeding mechanism can achieve the effects of uniform feeding and stable screening; according to the adjustable double-layer sieve plate structure, the sizes of sieve holes of the sieve plate are adjusted under the condition that the sieve plate is not detached and replaced, seeds with different particle sizes can be screened, and meanwhile blocked sieve holes can be cleaned by adjusting the sizes of the sieve holes.

Description

Technical Field

[0001] This utility model relates to the field of agricultural planting technology, and in particular to a seed screening device for agricultural use. Background Technology

[0002] Seeds are the starting point of all agricultural production, and seed selection is the starting point of agricultural production, which has a great impact on the germination rate, healthy growth and yield of crops.

[0003] Currently, my country's crop harvesting methods are extensive, with a very low utilization rate of high-precision machinery. In some areas, manual labor is still used, resulting in inconsistent seed quality. The harvested seeds often contain excessive impurities such as weeds, straw, and clods of soil, or are shriveled, immature, or damaged. If these impurities are not separated and removed in a timely manner, it will significantly impact subsequent production, processing, sales, and planting, hindering production and economic benefits.

[0004] A search revealed Chinese Patent Publication No. CN215031024U, which discloses an agricultural seed screening device. The device includes a main body and a shaking component for screening seeds. The shaking component comprises a cylinder at the bottom of the main body, a telescopic rod on one side of the cylinder, an impact pad at one end of the telescopic rod, an inner box located inside the main body and above the impact pad, and a sliding groove in the upper middle part of the inner body. This invention, through the arrangement of the main body, telescopic rod, inner box, and a third spring, allows the cylinder to drive the impact pad at one end of the telescopic rod to impact the bottom of the inner box. While this patent effectively removes inferior seeds and small impurities, it cannot remove longer stems, weeds, branches, or leaves. Furthermore, due to the limited mesh size, it cannot accommodate seeds of different sizes. Additionally, the patent lacks a controllable feeding mechanism, which cannot guarantee uniform feeding, thus affecting screening efficiency and effectiveness. Utility Model Content

[0005] The purpose of this invention is to provide an agricultural seed screening device to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] An agricultural seed screening device includes a shell, a discharge port and a waste port on the side of the shell, a feeding mechanism for intermittent seed feeding on the shell, a seed screening mechanism for removing impurities from the seeds on the lower side of the feeding mechanism, and a power mechanism connected to the feeding mechanism and the seed screening mechanism.

[0008] The feeding mechanism includes a hopper fixed to the upper end of the housing, a hopper baffle rotatably connected to the housing via a pin at the bottom of the hopper, a camshaft rotatably connected to the housing below the hopper baffle, a driven pulley fixedly connected to one end of the camshaft through the housing, and a downwardly inclined feeding plate fixedly connected to the housing below the camshaft.

[0009] The seed screening mechanism includes an inverted V-shaped air screen plate located on the lower side of the feed plate. An air chamber is located on one side of the air screen plate located on the lower side of the feed plate. A lower screen plate is located below the air chamber. An upper screen plate is adjusted and installed on the lower screen plate. The lowest side of the lower screen plate is rotatably connected to the housing, and the other side of the lower screen plate is connected to the power mechanism.

[0010] Preferably, the air outlet of the blower chamber is elongated and parallel to the adjacent inclined surface of the air screen plate, and a fan is connected to the rear end of the blower chamber.

[0011] Preferably, the power mechanism includes an electric motor fixed to the bottom of the inner side of the housing. The electric motor is a dual-shaft motor. A rotating disk is mounted on one output shaft of the electric motor. A connecting rod is rotatably connected to the rotating disk via a pin. A drive pulley is fixed on the other output shaft of the electric motor. Belts are fitted onto the drive pulley and the driven pulley.

[0012] Preferably, the connecting rod is rotatably connected to the highest point of the lower screen plate via a shaft, and a waste plate is fixed at the lower end of the lower screen plate at an angle to the lower screen plate, with the opening of the waste plate at the angle to the lower screen plate facing the discharge port.

[0013] Preferably, a long groove is provided on the side wall of the lower screen plate, and a stud passing through the long groove is fixed on the upper screen plate, with a locking nut installed on the stud.

[0014] The beneficial effects are as follows: by driving the feeding mechanism and the seed screening mechanism simultaneously through the power mechanism, different types of impurities can be screened out through air blowing and vibration screening, thereby improving the impurity removal rate and working efficiency. The controllable feeding mechanism can achieve uniform feeding and stable screening effect. The adjustable double-layer sieve plate structure allows the size of the sieve plate holes to be adjusted without disassembling or replacing the sieve plate, which can screen seeds of different particle sizes. At the same time, the sieve hole size can be adjusted to clean the blocked sieve holes.

[0015] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1This is a schematic diagram of the overall structure of the agricultural seed screening device described in this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of the agricultural seed screening device described in this utility model;

[0019] Figure 3 This is a schematic diagram of the power mechanism of the agricultural seed screening device described in this utility model;

[0020] Figure 4 This is a partial schematic diagram of the seed screening mechanism of an agricultural seed screening device according to the present invention;

[0021] Figure 5 This is a partially enlarged view of the seed screening mechanism of an agricultural seed screening device described in this utility model.

[0022] The reference numerals in the attached drawings are explained as follows: 1. Housing; 101. Discharge port; 102. Waste port; 201. Hopper; 202. Hopper baffle; 203. Camshaft; 204. Feed plate; 301. Blower chamber; 302. Air screen plate; 303. Lower screen plate; 304. Upper screen plate; 305. Waste plate; 401. Motor; 402. Rotating disc; 403. Connecting rod; 404. Drive pulley; 405. Driven pulley. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-5 As shown, an agricultural seed screening device includes a housing 1, with a discharge port 101 and a waste port 102 on the side of the housing 1. The housing 1 is provided with a feeding mechanism for intermittent seed feeding, and a seed screening mechanism for removing impurities from the seeds is provided below the feeding mechanism. A power mechanism is connected to the feeding mechanism and the seed screening mechanism.

[0027] In this embodiment: the feeding mechanism includes a hopper 201 fixed to the upper end of the housing 1. The bottom of the hopper 201 is provided with a hopper baffle 202 rotatably connected to the housing 1 via a pin. Below the hopper baffle 202 is a camshaft 203 rotatably connected to the housing 1. One end of the camshaft 203 passes through the housing 1 and is fixedly connected to a driven pulley 405. The driven pulley 405 drives the camshaft 203 to rotate and lift and lower the hopper baffle 202 to control intermittent feeding. Below the camshaft 203 is a feed plate 204 fixedly connected to the housing 1 and tilted downwards. Seeds slide down along the feed plate 204 to the seed screening mechanism for screening.

[0028] In this embodiment: the seed screening mechanism includes an inverted V-shaped air screen plate 302 disposed on the lower side of the feed plate 204. A blower chamber 301 is disposed on one side of the air screen plate 302 below the feed plate 204. A lower screen plate 303 is disposed below the blower chamber 301, and an upper screen plate 304 is adjusted and installed on the lower screen plate 303. The lowest side of the lower screen plate 303 is rotatably connected to the housing 1, and the other side of the lower screen plate 303 is connected to the power mechanism. The air outlet of the blower chamber 301 is elongated and parallel to the adjacent inclined surface of the air screen plate 302. A fan is connected to the rear end of the blower chamber 301 to provide... The air source performs preliminary screening of the seeds entering the air sieve channel. A waste plate 305 is fixed at the lower end of the lower sieve plate 303 at an angle to the lower sieve plate 303. The opening of the waste plate 305 at the angle to the lower sieve plate 303 faces the discharge port 101. The waste material screened by the vibrating sieve falls onto the waste plate 305 and slides down to be collected. A long groove is provided on the side wall of the lower sieve plate 303. A stud is fixed on the upper sieve plate 304 that passes through the long groove. A locking nut is installed on the stud. After loosening the locking nut, the position of the upper sieve plate 304 can be adjusted so that it is staggered with the sieve holes provided on the lower sieve plate 303 to adjust the size of the sieve holes.

[0029] In this embodiment: the power mechanism includes an electric motor 401 fixed to the bottom of the inner side of the housing 1. The electric motor 401 is a dual-shaft motor. A rotating disk 402 is installed on one output shaft of the electric motor 401. A connecting rod 403 is rotatably connected to the rotating disk 402 through a pin. A drive pulley 404 is fixed on the other output shaft of the electric motor 401. A belt is fitted on the drive pulley 404 and the driven pulley 405 to transmit power to the camshaft 203. The connecting rod 403 is rotatably connected to the highest point of the lower screen plate 303 through a shaft, driving the lower screen plate 303 to swing up and down to complete the vibrating sieving.

[0030] Working principle: During use, the seeds to be screened are poured into the top hopper 201 of the screening device. The motor 401 and the blower in the air chamber 301 are started. The output shafts at both ends of the motor 401 drive the camshaft 203 and the rotating disk 402 respectively. The rotation of the camshaft 203 controls the hopper baffle 202, causing the seeds to evenly enter the downward-sloping feed plate 204. The seeds roll downwards along the slope of the feed plate 204 and fall onto the air screen plate 302. During this falling process, they undergo preliminary air screening through the air screen channel, blowing weeds and straw from the seeds onto the waste side of the air screen plate 302 and collecting and discharging them through the waste port 102. After sieving, the seeds fall onto the side of the air screen plate 302 near the blower chamber 301 and bounce onto the upper screen plate 304. The upper screen plate 304 swings up and down under the drive of the motor 401 to vibrate and screen. As the seeds roll down the upper screen plate 304, shriveled seeds, damaged seeds and soil clods are removed. Large and plump seeds roll down the inclined surface of the upper screen plate 304 to the discharge port 101 for collection. The impurities removed fall onto the waste plate 305 for collection. When the screen holes are blocked or when it is necessary to screen seeds of different sizes, the upper screen plate 304 can be slid up and down to adjust the size of the screen holes by loosening the locking nut on the stud of the upper screen plate 304.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An agricultural seed screening device comprising a housing (1), characterised in that: The shell (1) side is provided with discharge port (101), waste port (102), the shell (1) is provided with the intermittent seed feeding mechanism of making seed, the seed screening mechanism of the seed feeding mechanism downside is provided with impurity removal, and the power mechanism is connected on the seed feeding mechanism and the seed screening mechanism; The feeding mechanism includes a bin (201) fixed to the upper end of the shell (1), the bin (201) bottom is provided with a bin baffle (202) rotatably connected to the shell (1) through a pin shaft, the bin baffle (202) below is provided with a camshaft (203) rotatably connected to the shell (1), one end of the camshaft (203) penetrates the shell (1) and is fixedly connected with a driven pulley (405), the camshaft (203) below is provided with a downward inclined feeding plate (204) fixedly connected to the shell (1); The seed screening mechanism includes a V-shaped air screen plate (302) arranged on the lower side of the feeding plate (204), the air screen plate (302) is located on one side of the lower side of the feeding plate (204) and is provided with a blast bin (301), the blast bin (301) below is provided with a lower screen plate (303), the lower screen plate (303) is provided with an upper screen plate (304) installed on the lower screen plate (303), the lowermost side of the lower screen plate (303) is rotatably connected to the shell (1), and the other side of the lower screen plate (303) is connected to the power mechanism.

2. The seed screening device for agricultural use according to claim 1, characterized by: The air outlet of the blast bin (301) is in a strip shape, and the air outlet is arranged in parallel with the adjacent inclined surface of the air screen plate (302), and the rear end of the blast bin (301) is communicated with a fan.

3. The agricultural seed screening device of claim 1, wherein: The power mechanism includes a motor (401) fixed to the inner bottom of the shell (1), the motor (401) is a double-shaft motor, a rotating disc (402) is installed on one side output shaft of the motor (401), a connecting rod (403) is rotatably connected to the rotating disc (402) through a pin shaft, a driving pulley (404) is fixed to the other side output shaft of the motor (401), and a belt is sleeved on the driving pulley (404) and the driven pulley (405).

4. The agricultural seed screening device of claim 3, wherein: The connecting rod (403) is rotatably connected to the highest end of the lower screen plate (303) through a shaft, the lower end of the lower screen plate (303) is fixed with a waste plate (305) at an angle with the lower screen plate (303), and the waste plate (305) and the lower screen plate (303) are at an angle opening towards the discharge port (101).

5. The agricultural seed screening device of claim 1, wherein: The side wall of the lower screen plate (303) is provided with a long slot, a stud is fixed on the upper screen plate (304) and penetrates the long slot, and a locking nut is installed on the stud.

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