A screening device for maize breeding

Abstract

This utility model relates to the field of corn screening technology, specifically to a corn breeding screening device, including a screening box with a screening mechanism located at the bottom inside. It also includes a cleaning mechanism for removing impurities from the corn kernels, located at the top inside the screening box. A dust extraction fan is installed inside the front fixed cover, and a filter screen is located behind the dust extraction fan. A power-accumulating structure is located below the feeding platform to store force for pulling the platform downwards. Beneficial effects: The cleaning mechanism first gathers a large number of corn kernels together, then the power-accumulating structure throws the kernels into the air, and the dust extraction fan and filter screen then adsorb the corn silk and impurities mixed in between the kernels, preventing these impurities from falling onto the screening mechanism and clogging the sieve holes. This ensures the normal screening operation of the screening mechanism and improves the efficiency of corn kernel screening.

Description

Technical Field

[0001] This utility model relates to the field of corn screening technology, and in particular to a screening device for corn breeding. Background Technology

[0002] Maize breeding is the process of selectively propagating and planting maize to improve its quality, yield, and resistance. One of the key steps in maize breeding is selecting ideal maize seeds. In the breeding of sweet maize, kernel screening is usually required to select and cultivate high-quality maize varieties. This process requires efficient and precise equipment to ensure that seeds that meet the breeding objectives are selected.

[0003] By comparing a corn kernel screening device for fresh corn breeding with patent publication number CN222805570U, it is found that in this solution, through the cooperation of the motor, the swing block and the screen, the efficient screening can effectively separate corn kernels that meet the quality standards, reduce the generation of defective and waste products, and remove foreign objects and impurities. However, before screening, a large number of corn kernels may have corn silk and impurities remaining between them. This device fails to clean the corn silk and impurities. When screening corn kernels, these impurities may clog the screen holes, thereby reducing the screening efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a screening device for maize breeding in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A screening device for maize breeding includes a screening box, a screening mechanism disposed at the bottom inside the screening box, and a cleaning mechanism for cleaning impurities in maize breeding, which is located at the top inside the screening box.

[0007] The cleaning mechanism includes a rotating shaft mounted inside the upper part of the screening box, a feeding platform fixed on the rotating shaft, the feeding platform being inclined downwards, a torsion spring connecting the rotating end of the rotating shaft to the screening box, a protective plate installed at the edge of the feeding platform, a rear fixed cover on the rear side of the screening box with a blower installed inside the rear fixed cover, a front fixed cover on the front side of the screening box with a dust suction fan installed inside the front fixed cover, a filter screen on the rear side of the dust suction fan, the filter screen being slidably connected to the front fixed cover, a handle on the top of the filter screen, a feeding hopper on the top of the screening box, and a force-accumulating structure below the feeding platform for pulling the feeding platform downwards.

[0008] Preferred: The power storage structure includes a connecting plate fixed at the bottom of the feeding platform near the rotating shaft, a rotating shaft below the connecting plate, the rotating shaft being rotatably connected to the screening box, a rotating motor installed at the rotating end of the rotating shaft, the output end of the rotating motor being fixed to the rotating end of the rotating shaft via a coupling, a lever fixed on the rotating shaft, the lever and the connecting plate being arc-shaped at their respective ends, a pad fixed on the inner wall of the screening box near the top of the feeding platform, a top plate fixed at the top of the feeding platform near the pad, and a control structure for controlling the falling of corn seedlings at the bottom of the feeding platform.

[0009] Preferred: The control structure includes a baffle plate that is slidably installed at the bottom of the feeding platform. The baffle plate is L-shaped. A compression spring is connected between the bottom of the baffle plate and the feeding platform. Top columns are fixed at both the front and rear ends of the baffle plate. The top columns are vertically set. A fixed platform is fixed at the upper part of the screening box near the top columns.

[0010] Preferably, the screening mechanism includes a screening screen that is slidably disposed inside the lower part of the screening box, two baffles that are symmetrically arranged in the front-back direction are provided at the upper part of the screening screen, a limit spring is connected between the screening screen and the inner wall of the screening box, a material holding box is slidably installed at the bottom of the screening box, a handle is provided at the front end of the material holding box, and a vibration structure is provided above the screening screen to drive the screening screen to vibrate up and down.

[0011] Preferably, the vibration structure includes two drive shafts arranged above the screening screen, which are symmetrically arranged in the front-to-back direction. The drive shafts are rotatably connected to the screening box, and a convex plate is fixed on the drive shaft. A fixed frame is provided below the rear end of the screening box, and the drive shaft is rotatably connected to the fixed frame. A rotating motor is installed at the rotating end of the drive shaft, and the output end of the rotating motor is fixed to the rotating end of the drive shaft through a coupling.

[0012] Preferably, pulleys are installed at the rotating ends of the two drive shafts, and a drive belt connects the two pulleys.

[0013] Preferably, the top plate is made of rubber.

[0014] Compared with existing technologies, the beneficial effects are as follows:

[0015] The cleaning mechanism first gathers a large number of corn kernels together, and then uses a power storage structure to throw the corn kernels into the air. Then, the dust fan and filter screen adsorb the corn silk and impurities mixed between the corn kernels, preventing these impurities from falling onto the screening mechanism and clogging the screen holes. This ensures the normal screening operation of the screening mechanism and improves the efficiency of corn kernel screening. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a spatial perspective view of a screening device for maize breeding as described in this utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the screening box of a screening device for corn breeding according to this utility model;

[0019] Figure 3 This is a schematic diagram of the cleaning mechanism of a screening device for corn breeding according to the present invention;

[0020] Figure 4 This is a schematic diagram of the screening mechanism of a screening device for corn breeding according to the present invention;

[0021] Figure 5 This is a cross-sectional view of the internal structure of the front and rear fixing covers of a screening device for corn breeding described in this utility model.

[0022] The annotations in the attached figures are explained as follows:

[0023] 100. Screening box; 201. Rotating shaft; 202. Feeding platform; 203. Top plate; 204. Protective plate; 205. Torsion spring; 206. Connecting plate; 207. Rotating shaft; 208. Pulley; 209. Rotary motor; 210. Baffle plate; 211. Top column; 212. Fixed platform; 213. Pad plate; 214. Rear fixed cover; 215. Blowing fan; 216. Front fixed cover; 217. Dust extraction fan; 218. Filter screen; 301. Screening screen; 302. Baffle plate; 303. Drive shaft; 304. Convex plate; 305. Rotary motor; 306. Fixed frame; 307. Material holding box. Detailed Implementation

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known control device such as a computer. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

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

[0026] like Figures 1-5 As shown, a screening device for corn breeding includes a screening box 100, a screening mechanism for screening corn breeding, the screening mechanism being located inside the screening box 100 at the bottom, and a cleaning mechanism for cleaning impurities in corn breeding, the cleaning mechanism being located inside the screening box 100 at the top.

[0027] In this embodiment: the cleaning mechanism includes a rotating shaft 201 rotatably disposed above the inside of the screening box 100, a feeding platform 202 fixed on the rotating shaft 201, the feeding platform 202 being inclined downward, a torsion spring 205 connecting the rotating end of the rotating shaft 201 and the screening box 100, a protective plate 204 installed at the edge of the feeding platform 202, a rear fixing cover 214 provided at the rear of the screening box 100, a blower 215 installed inside the rear fixing cover 214, a front fixing cover 216 provided at the front of the screening box 100, a dust suction fan 217 installed inside the front fixing cover 216, a filter screen 218 provided at the rear of the dust suction fan 217, the filter screen 218 being slidably connected to the front fixing cover 216, a handle provided at the top of the filter screen 218, a feeding bin provided at the top of the screening box 100, and a force-accumulating structure for pulling the feeding platform 202 downward below the feeding platform 202.

[0028] The power storage structure includes a connecting plate 206 fixed at the bottom of the feeding platform 202 near the rotating shaft 201, a rotating shaft 207 below the connecting plate 206, the rotating shaft 207 being rotatably connected to the screening box 100, a rotary motor 209 installed at the rotating end of the rotating shaft 207, the output end of the rotary motor 209 being fixed to the rotating end of the rotating shaft 207 via a coupling, a lever 208 fixed on the rotating shaft 207, the lever 208 and the connecting plate 206 being arc-shaped at their respective ends, a pad 213 fixed on the inner wall of the screening box 100 near the upper end of the feeding platform 202, a top plate 203 fixed at the top of the feeding platform 202 near the pad 213, the top plate 203 being made of rubber, and a control structure for controlling the falling of corn seeds at the bottom of the feeding platform 202.

[0029] The control structure includes a baffle plate 210 that is slidably installed at the bottom of the feeding platform 202. The baffle plate 210 is L-shaped. A compression spring is connected between the bottom of the baffle plate 210 and the feeding platform 202. Top columns 211 are fixed at both the front and rear ends of the baffle plate 210. The top columns 211 are vertically set. A fixed platform 212 is fixed at the upper part of the screening box 100 near the top column 211.

[0030] In this embodiment: the screening mechanism includes a screening screen 301 slidably disposed inside the lower part of the screening box 100. Two baffles 302 are provided on the upper end of the screening screen 301 symmetrically arranged in the front-back direction. A limit spring is connected between the screening screen 301 and the inner wall of the screening box 100. A material holding box 307 is slidably installed at the bottom of the screening box 100. A handle is provided at the front end of the material holding box 307. A vibration structure is provided above the screening screen 301 to drive the screening screen 301 to vibrate up and down.

[0031] The vibration structure includes two drive shafts 303 positioned above the screening screen 301. The two drive shafts 303 are symmetrically arranged in the front-to-back direction and are rotatably connected to the screening box 100. A protruding plate 304 is fixed on the drive shaft 303. A fixed frame 306 is provided below the rear end of the screening box 100, and the drive shaft 303 is rotatably connected to the fixed frame 306. A rotating motor 305 is installed at the rotating end of the drive shaft 303, and the output end of the rotating motor 305 is fixed to the rotating end of the drive shaft 303 through a coupling. Pulleys are installed at the rotating ends of the two drive shafts 303, and a drive belt is connected between the two pulleys. The cleaning mechanism first gathers a large number of corn kernels together, and then the energy storage structure throws the corn kernels into the air. The dust collector 217 and the filter screen 218 then adsorb the corn silk and impurities mixed between the corn kernels, preventing these impurities from falling onto the screening mechanism and clogging the screen holes. This ensures the normal screening operation of the screening mechanism and improves the efficiency of corn kernel screening.

[0032] Working principle: First, a large amount of corn kernels are poured into the feed hopper at the top of the screening box 100. The corn kernels fall onto the surface of the feeding platform 202 along the feed hopper. The corn kernels roll down the feeding platform 202 and fall onto the baffle plate 210, gathering a large amount of corn kernels together. Then, the rotary motor 209 is started to drive the rotary shaft 207 to rotate, which in turn drives the paddle plate 208 to rotate. The paddle plate 208 rotates clockwise and pushes the connecting plate 206 at the bottom of the feeding platform 202 upward, causing the connecting plate 206 to drive the feeding platform 202 to rotate counterclockwise, storing force on the torsion spring 205 at the rotating end of the feeding platform 202.

[0033] When the lever 208 disengages from the connecting plate 206, the feeding platform 202, under the release force of the torsion spring 205, rapidly rotates clockwise, causing the feeding end of the feeding platform 202 to rotate rapidly upward, throwing the gathered corn kernels upward. As the feeding platform 202 rises, it causes the baffle plate 210 to move upward. The top posts 211 at both ends of the baffle plate 210 press against the fixed platform 212, causing the fixed platform 212 to press the top posts 211 downward. The top posts 211 then move the baffle plate 210 downward, thus... Open the feeding end of the feeding platform 202 to allow the corn kernels to fall onto the surface of the screening screen 301 below. When the corn kernels are thrown up, start the blower 215 and the vacuum fan 217. Since the corn silk and impurities are relatively light, the two work together to blow the corn silk and impurities mixed in between the corn kernels onto the surface of the filter screen 218, so that the filter screen 218 filters them. This prevents these impurities from falling onto the screening screen 301 and clogging the screen holes, thereby ensuring the normal screening operation of the screening mechanism and improving the efficiency of corn kernel screening.

[0034] Simultaneously, when the feeding platform 202 resets clockwise, it causes the top plate 203 to move down rapidly and collide with the pad plate 213, causing the feeding platform 202 to vibrate. This helps to detach the corn kernels adhering to the surface of the feeding platform 202, reducing adhesion. Then, the rotating motor 305 is started, and the transmission belt drives the two transmission shafts 303 to rotate simultaneously, which in turn drives the two convex plates 304 to rotate. When the convex plates 304 rotate, they squeeze the screening screen 301 up and down, causing the screening screen 301 to vibrate up and down. This helps the screening screen 301 to screen the corn kernels on the surface more quickly, while reducing the corn kernels from clogging the screen holes and improving the screening efficiency. The qualified corn kernels fall into the collection box 307 below for collection, completing the corn kernel screening operation.

[0035] 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.

Claims

1. A screening device for maize breeding, comprising a screening box (100), wherein a screening mechanism is provided at the bottom inside the screening box (100), characterized in that: It also includes a cleaning mechanism for removing impurities in maize breeding, the cleaning mechanism being located above the inside of the screening box (100); The cleaning mechanism includes a rotating shaft (201) rotatably mounted above the inside of the screening box (100). A feeding platform (202) is fixed on the rotating shaft (201). The feeding platform (202) is inclined downwards. A torsion spring (205) connects the rotating end of the rotating shaft (201) to the screening box (100). A protective plate (204) is installed at the edge of the feeding platform (202). A rear fixing cover (214) is provided on the rear side of the screening box (100). A cleaning mechanism includes a rear fixing cover (214) installed inside the rear fixing cover (214). A fan (215) is provided on the front side of the screening box (100), a front fixed cover (216) is provided on the front side, a vacuum fan (217) is installed inside the front fixed cover (216), a filter screen (218) is provided on the rear side of the vacuum fan (217), the filter screen (218) is slidably connected to the front fixed cover (216), a handle is provided at the top of the filter screen (218), a feeding bin is provided at the top of the screening box (100), and a power storage structure is provided below the unloading platform (202) for storing force to pull the unloading platform (202) downward.

2. The screening device for maize breeding according to claim 1, characterized in that: The energy storage structure includes a connecting plate (206) fixed at the bottom end of the feeding platform (202) near the rotating shaft (201). A rotating shaft (207) is provided below the connecting plate (206). The rotating shaft (207) is rotatably connected to the screening box (100). A rotary motor (209) is installed at the rotating end of the rotating shaft (207). The output end of the rotary motor (209) is fixed to the rotating end of the rotating shaft (207) through a coupling. A lever (208) is fixed on the rotating shaft (207). The lever (208) and the connecting plate (206) are both arc-shaped at one end. A pad (213) is fixed on the inner wall of the screening box (100) near the upper end of the feeding platform (202). A top plate (203) is fixed at the top of the feeding platform (202) near the pad (213). A control structure for controlling the falling of corn breeding seeds is provided at the bottom of the feeding platform (202).

3. The screening device for maize breeding according to claim 2, characterized in that: The control structure includes a baffle plate (210) slidably installed at the bottom of the feeding platform (202). The baffle plate (210) is L-shaped. A compression spring is connected between the bottom of the baffle plate (210) and the feeding platform (202). Top columns (211) are fixed at both the front and rear ends of the baffle plate (210). The top columns (211) are vertically arranged. A fixed platform (212) is fixed at the upper part of the screening box (100) near the top column (211).

4. The screening device for maize breeding according to claim 3, characterized in that: The screening mechanism includes a screening screen (301) slidably disposed inside the screening box (100) at the bottom. Two baffles (302) are symmetrically arranged in the front-back direction at the upper end of the screening screen (301). A limit spring is connected between the screening screen (301) and the inner wall of the screening box (100). A material holding box (307) is slidably installed at the bottom of the screening box (100). A handle is provided at the front end of the material holding box (307). A vibration structure is provided above the screening screen (301) to drive the screening screen (301) to vibrate up and down.

5. A screening device for maize breeding according to claim 4, characterized in that: The vibration structure includes two drive shafts (303) disposed above the screen (301). The two drive shafts (303) are symmetrically arranged in the front-back direction. The drive shafts (303) are rotatably connected to the screening box (100). A protruding plate (304) is fixed on the drive shaft (303). A fixed frame (306) is provided below the rear end of the screening box (100). The drive shaft (303) is rotatably connected to the fixed frame (306). A rotating motor (305) is installed at the rotating end of the drive shaft (303). The output end of the rotating motor (305) is fixed to the rotating end of the drive shaft (303) through a coupling.

6. The screening device for maize breeding according to claim 5, characterized in that: The two drive shafts (303) are equipped with pulleys at their rotating ends, and a drive belt is connected between the two pulleys.

7. A screening device for maize breeding according to claim 6, characterized in that: The top plate (203) is made of rubber.

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