Screening machine for breeding corn seeds

Abstract

The invention belongs to the technical field of sieve plate screening, and particularly relates to a corn seed breeding screening machine which comprises a rack, a control part, a screening mechanism, a guide mechanism, a disturbance mechanism and a drainage mechanism. The rack comprises a vertical plate, a sliding rail and a feeding hopper, the sliding rail is fixedly installed on the side wall of the vertical plate, and the feeding hopper is arranged above the vertical plate; the screening mechanism comprises a screening frame and a screening plate arranged in the screening frame. The control part is used for controlling the screening frame to reciprocate along the outer wall of the sliding rail; the guide mechanism comprises a connecting table, a fixing table and a contact roller, the contact roller is connected with the vertical plate through the fixing table, and the connecting table is fixedly installed on the side wall of the screening frame; the disturbance mechanism comprises a bearing plate and a jacking cylinder, the bearing plate is arranged above the screening frame in a sliding mode, and the jacking cylinder is arranged at the bottom of the bearing plate in a liftable mode; through cooperation of the structure, the screening plate can be prevented from being blocked, vibration of the screening plate is changed into superposition of natural vibration and interference vibration, and the screening efficiency is kept.

Description

Technical Field

[0001] The present invention belongs to the technical field of sieve plate screening, and specifically relates to a screening machine for corn seed breeding. Background Art

[0002] In modern agricultural production, the screening of corn seeds is a key link to ensure the quality of seeds and the subsequent planting effect. At present, most of the common corn seed screening equipment on the market adopts a working mode in which the sieve plate reciprocates horizontally. This screening method mainly utilizes the horizontal movement of the sieve plate to make the corn seeds roll and move continuously on the sieve surface, so as to realize the separation of seeds of different sizes and shapes.

[0003] However, this screening mechanism has significant drawbacks and seriously affects the screening efficiency. On the one hand, the working mode of the horizontal reciprocating movement of the sieve plate leads to a relatively single movement path of the seeds on the sieve surface, limiting the contact frequency and contact angle between the seeds and the sieve holes. A large number of seeds need to pass through the sieve surface multiple times to complete the screening, increasing the screening time and energy consumption.

[0004] On the other hand, during the horizontal reciprocating movement of the sieve plate, the frequent changes in its acceleration and speed affect the stability of the equipment operation, and problems such as jamming and sieve hole blockage are likely to occur, further reducing the screening efficiency.

[0005] In addition, the sieve plates used in existing screening equipment are mostly made of elastic materials. During the operation of the equipment, the vibration of the sieve plate itself will have an impact on the corn seeds. Frequent vibration impacts are extremely likely to cause damage to the seed epidermis and germ. Seed damage will not only reduce the germination rate and survival rate of the seeds, but also affect the subsequent planting yield.

[0006] Therefore, the present invention provides a screening machine for corn seed breeding. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems mentioned in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows: A screening machine for corn seed breeding according to the present invention includes a frame, a control unit, a screening mechanism, a guiding mechanism, a disturbing mechanism, and a drainage mechanism;

[0009] The frame includes a vertical plate, a slide rail, and a feed hopper. The slide rail is fixedly installed on the side wall of the vertical plate, and the feed hopper is arranged above the vertical plate;

[0010] The screening mechanism includes a screening frame and a screening plate arranged inside the screening frame;

[0011] The control unit is used to control the reciprocating sliding of the screening frame along the outer wall of the slide rail;

[0012] The guiding mechanism includes a connecting platform, a fixed platform and a contact roller. The contact roller is connected to the vertical plate through the fixed platform, and the connecting platform is fixedly installed on the side wall of the screening frame;

[0013] The disturbing mechanism includes a bearing plate and a pressing cylinder. The bearing plate is slidably arranged above the screening frame, and the pressing cylinder is arranged at the bottom of the bearing plate in a liftable manner;

[0014] The drainage mechanism includes a control cylinder and a water tank fixedly installed on the side wall of the vertical plate. The liquid in the water tank enters the inner cavity of the pressing cylinder through the control of the inner cavity pressure of the control cylinder.

[0015] Preferably, rollers are slidably installed inside the slide rail, a guiding frame is fixedly installed on the outer wall of the screening frame, a connecting plate is slidably installed inside the guiding frame through an elastic member, and the axial end of the roller is rotatably connected to the connecting plate through a pin shaft;

[0016] A discharge opening is arranged on one side of the screening frame, a closing plate is movably arranged at the discharge opening, a control box is fixedly installed on the outer wall of the screening frame, a driving member is fixedly installed on the outer wall of the control box, a transmission member is arranged inside the control box, and the driving member controls the rotation of the closing plate through the transmission member.

[0017] Preferably, the control part includes a control motor, an eccentric disc, a connecting rod and an ear plate;

[0018] The axial end of the eccentric disc is fixedly connected to the output shaft of the control motor;

[0019] One end of the connecting rod is rotatably connected to the outer wall of the eccentric disc, the other end of the connecting rod is rotatably connected to the ear plate, and the outer wall of the ear plate is fixedly connected to the outer wall of the screening frame.

[0020] Preferably, a bearing platform is fixedly installed on the upper end surface of the screening frame, a transmission screw rod is rotatably installed on the side wall of the bearing platform, a threaded sleeve is installed on the outer wall of the transmission screw rod through internal and external thread cooperation, the side wall of the bearing plate is fixedly connected to the side wall of the threaded sleeve, and a driving motor is fixedly installed on the outer wall of the bearing platform. The driving motor controls the rotation of the transmission screw rod through a gear commutator.

[0021] Preferably, a rigid pipe is fixedly installed at the bottom of the bearing plate, a connecting cylinder is elastically installed at the bottom of the bearing plate, the bottom of the rigid pipe extends into the inside of the connecting cylinder and is fixedly installed with a sliding plug. The outer wall of the sliding plug is slidably attached to the inner wall of the connecting cylinder, and the inner cavity of the rigid pipe is communicated with the inner cavity of the connecting cylinder;

[0022] The side wall of the pressing cylinder is fixedly connected to the side wall of the connecting cylinder and the inner cavities are communicated with each other. A protective cylinder is sleeved on the outer wall of the pressing cylinder.

[0023] Preferably, the control cylinder is fixedly installed on the upper end surface of the bearing plate. The control cylinder has a liquid inlet and a liquid outlet with one-way conduction and opposite conduction directions. The liquid inlet is used to connect with the water tank, and the liquid outlet is used to connect with the hard pipe. A return nozzle for connecting with the water tank is arranged on the outer wall of the pressing cylinder;

[0024] A control plug is slidably installed in the inner cavity of the control cylinder, and the outer wall of the control plug is hermetically attached to the inner wall of the control cylinder.

[0025] Preferably, a guiding plate is fixedly installed on the side wall of the bearing platform, and a guiding groove is formed on the upper end surface of the guiding plate;

[0026] A transmission rod is slidably installed on the inner wall of the control cylinder, and one end of the transmission rod is elastically connected to the control plug;

[0027] One end of the transmission rod away from the control plug is rotatably installed with a sliding shaft, and the bottom of the sliding shaft extends to the inner wall of the guiding groove, and the outer wall is slidably attached to the inner wall of the guiding groove.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. By setting the guiding mechanism in the present invention, during the reciprocating sliding of the screening frame, through the cooperation of the contact roller and the notch at the bottom of the connecting table, when the screening frame and the screening plate reciprocate horizontally, they simultaneously have an up-and-down sliding motion state, dispersing the piled-up seed population, allowing more seeds to have the opportunity to contact the sieve holes, improving the efficiency of seed screening. Also, a pressing cylinder is provided. During screening, the pressing cylinder is controlled to reciprocally fit with the vibrating screening plate, thereby scraping the surface of the screening plate, peeling off the seeds caught in the mesh holes of the screening plate, preventing the screening plate from being blocked, maintaining the screening efficiency. At the same time, when the pressing cylinder fits with the screening plate, an external periodic interference force is applied to the screening plate, making the vibration of the screening plate become the superposition of natural vibration and interference vibration, and the takeoff height, landing position, and movement direction of the seed particles become more random, further improving the screening efficiency;

[0030] 2. When the pressing cylinder fits with the screening plate in the present invention, clear water is injected into the pressing cylinder. On the one hand, it can absorb the heat generated by friction, playing a role in protecting the pressing cylinder and the screening plate. At the same time, the pressing cylinder with clear water stored inside absorbs the energy of the self-vibration of the screening plate through the inertial mass and fluid damping of the water, effectively suppressing the high-frequency self-vibration and random jitter of the sieve mesh, making the screening process more stable and efficient, while reducing mechanical loss and noise. At the same time, it can also reduce the impact load between the screening plate and the seeds, reducing the screening loss of the dried seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0033] Figure 2 It is a schematic installation diagram of the screening box in the present invention;

[0034] Figure 3 It is a schematic installation diagram of the closing plate in the present invention;

[0035] Figure 4 It is a schematic structural diagram of the connecting platform in the present invention;

[0036] Figure 5 It is a schematic internal structure diagram of the control box in the present invention;

[0037] Figure 6 It is a schematic installation diagram of the control cylinder in the present invention;

[0038] Figure 7 It is a schematic internal structure diagram of the control cylinder in the present invention;

[0039] Figure 8 It is a schematic installation diagram of the sliding plug in the present invention.

[0040] In the figure: 1. Feed hopper; 2. Screening plate; 3. Slide rail; 4. Closing plate; 5. Sliding plug; 6. Vertical plate; 7. Screening frame; 8. Water tank; 9. Eccentric disc; 10. Control motor; 11. Connecting rod; 12. Ear plate; 13. Guide frame; 14. Roller; 15. Fixed platform; 16. Connecting platform; 17. Protective cylinder; 18. Control cylinder; 19. Connecting plate; 20. Driving motor; 21. Carrying platform; 22. Pressing cylinder; 23. Guide plate; 24. Transmission screw; 25. Carrying plate; 26. Control box; 27. Contact roller; 28. Driving part; 29. Guide groove; 30. Threaded sleeve; 31. Hard pipe; 32. Transmission rod; 33. Connecting cylinder; 34. Control plug. Detailed implementation manners

[0041] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0042] Example 1: As Figures 1 to 8 shown, a screening machine for corn seed breeding in the present invention includes a frame, a control part, a screening mechanism, a guiding mechanism, a disturbing mechanism and a drainage mechanism.

[0043] The frame includes a vertical plate 6, a slide rail 3 and a feed hopper 1. The slide rail 3 is fixedly installed on the side wall of the vertical plate 6. The feed hopper 1 is arranged above the vertical plate 6. The vertical plate 6 is used to connect with the factory floor, and there are two vertical plates 6 arranged in parallel. The feed hopper 1 is used for the corn seeds after preliminary treatment (the preliminary treatment is to remove large-volume impurities inside such as soil blocks, corn cob fragments, etc.) to enter.

[0044] The screening mechanism includes a screening frame 7 and a screening plate 2 disposed within the screening frame 7. In this embodiment, the screening frame 7 is an aluminum alloy frame, and the screening plate 2 is a wire mesh screen (the mesh size is selected according to the actual corn variety). The screening plate 2 is detachably connected to the screening frame 7 by screws.

[0045] The control unit is used to control the reciprocating sliding of the screening frame 7 along the outer wall of the slide rail 3. Among them, the screening plate 2 is located directly below the feed hopper 1. Corn seeds passing through the feed hopper 1 fall above the screening plate 2. Through the reciprocating sliding of the screening frame 7, the screening of corn seeds is realized (when screening seeds, retain large-volume and plump individuals). A waste discharge plate is provided on the side wall of the vertical plate 6. Shrivelled and broken seeds pass through the screening plate 2 and fall on the waste discharge plate and are discharged. The plump seeds remain above the screening plate 2, realizing the screening of corn seeds.

[0046] The guiding mechanism includes a connecting table 16, a fixed table 15, and a contact roller 27. The contact roller 27 is connected to the vertical plate 6 through the fixed table 15. The outer wall of the fixed table 15 is fixedly connected to the outer wall of the vertical plate 6. The contact roller 27 is rotatably mounted on the upper end of the fixed table 15 through a bracket. The connecting table 16 is fixedly installed on the side wall of the screening frame 7. An arc-shaped notch is provided at the bottom of the connecting table 16, and the outer wall of the contact roller 27 is in real-time contact with the bottom of the connecting table 16.

[0047] During the reciprocating sliding of the screening frame 7, through the cooperation of the contact roller 27 and the notch at the bottom of the connecting table 16, when controlling the screening frame 7 and the screening plate 2 to reciprocate horizontally, they simultaneously have a vertical sliding motion state. The vibration or bump generated by the vertical sliding can make the seeds continuously jump in the vertical direction, dispersing the piled-up seed population, allowing more seeds to have the opportunity to contact the sieve holes. The vertical movement can accelerate the speed of small-particle seeds passing through the sieve holes. Compared with the existing screening equipment with only a single method of movement, the efficiency of screening seeds can be effectively improved.

[0048] The disturbing mechanism includes a bearing plate 25 and a pressing cylinder 22. The bearing plate 25 is slidably disposed above the screening frame 7. The pressing cylinder 22 is vertically movably disposed at the bottom of the bearing plate 25. The bearing plate 25 slides horizontally above the screening frame 7, and the pressing cylinder 22 can slide up and down at the bottom of the bearing plate 25.

[0049] During the screening process, control the pressing cylinder 22 to reciprocally contact the vibrating screening plate 2 (since the screening plate 2 itself has elasticity and will inevitably vibrate due to the influence of external mechanical movement during the screening process). In cooperation with the movement of the screening plate 2 itself (horizontal and vertical movements), the surface of the screening plate 2 is scraped, and the seeds caught in the mesh holes of the screening plate 2 are peeled off, preventing the screening plate 2 from being blocked and maintaining the screening efficiency.

[0050] When the screening plate 2 is under normal vibration (such as only moving up and down), its vibration frequency is fixed, and the seed particles are prone to form regular movements (such as jumping along a fixed trajectory), resulting in some particles repeatedly jumping over the sieve holes and being unable to pass through the sieve. When the pressing cylinder 22 is in contact with the screening plate 2, an external periodic interference force is applied to the screening plate 2, making the vibration of the screening plate 2 a superposition of natural vibration and interference vibration. The vibration trajectory of the screening plate 2 changes from a single sine wave to a composite waveform (such as a sawtooth wave, a pulse wave), and the take-off height, landing position, and movement direction of the seed particles become more random, further improving the screening efficiency.

[0051] The drainage mechanism includes a control cylinder 18 and a water tank 8 fixedly installed on the side wall of the vertical plate 6. The liquid in the water tank 8 enters the inner cavity of the pressing cylinder 22 through the control of the pressure in the inner cavity of the control cylinder 18. The water tank 8 stores clean water (damping liquid can be selected, and clean water is selected in this embodiment to save costs). By changing the pressure in the inner cavity of the control cylinder 18, water is supplied to the inner cavity of the pressing cylinder 22. At the same time, due to the setting of the water tank 8, when the vertical plate 6 vibrates, the water body has a movement trend opposite to that of the vertical plate 6 due to inertia, forming an inertia force coupling effect. The water body generates internal turbulence and viscous friction during vibration, converting mechanical energy into heat energy, consuming the vibration of the overall machinery (the vibration that generates noise, such as the vibration of the vertical plate 6 and the useless vibration of the internal structure), so as to buffer, shock-absorb, and reduce noise as much as possible.

[0052] After the pressing cylinder 22 is in contact with the screening plate 2, due to the sliding friction between the screening plate 2 and the pressing cylinder 22, heat is generated at the contact position. Clean water is injected into the inner part of the pressing cylinder 22 to absorb the heat generated by the friction, achieving the effect of protecting the pressing cylinder 22 and the screening plate 2.

[0053] In addition, the pressing cylinder 22 with clean water stored inside absorbs the energy of the self-vibration of the screening plate 2 through the inertial mass and fluid damping of the water, effectively suppressing the high-frequency self-vibration and random jitter of the sieve mesh, making the screening process more stable and efficient, while reducing mechanical loss and noise. At the same time, it can also reduce the impact load between the screening plate 2 and the seeds, reducing the screening loss of the dried seeds (the seeds collide with the vibrating screening plate 2 and are broken, which is the screening loss).

[0054] A roller 14 is slidably installed inside the slide rail 3, and the outer wall of the roller 14 is in rolling contact with the inner wall of the slide rail 3. A guide frame 13 is fixedly installed on the outer wall of the screening frame 7. A connecting plate 19 is slidably installed inside the guide frame 13 through an elastic member. The axial end of the roller 14 is rotatably connected to the connecting plate 19 through a pin shaft, thereby providing horizontal sliding support for the screening frame 7. At the same time, the elastic connection between the guide frame 13 and the connecting plate 19 also provides guidance for the vertical sliding of the screening frame 7.

[0055] As a preferred embodiment of the present invention, a discharge opening is provided on one side of the screening rack 7, and a discharge hopper is provided at the discharge opening of the screening rack 7. The screening plate 2 is inclined. After the screening is completed, the pressing cylinder 22 is controlled to be separated from the screening plate 2. At this time, the discharge opening is opened, and during the reciprocating movement of the screening rack 7, the qualified seeds are discharged through the discharge hopper.

[0056] A closing plate 4 is movably arranged at the discharge opening, and the closing plate 4 is used to close the discharge opening. During the screening process, the discharge opening needs to be closed.

[0057] A control box 26 is fixedly installed on the outer wall of the screening rack 7, and a driving member 28 is fixedly installed on the outer wall of the control box 26. The driving member 28 is a common servo motor.

[0058] A transmission member is arranged inside the control box 26. The driving member 28 controls the rotation of the closing plate 4 through the transmission member. The transmission member is a mutually meshing worm and worm gear, both of which are rotatably arranged inside the control box 26. One end of the worm is fixedly connected to the output shaft of the driving member 28, and the axial end of the worm gear is connected to the closing plate 4. When the driving member 28 controls the rotation of the worm, the closing plate 4 is driven to rotate through the worm gear, so as to control the closing and opening of the discharge opening.

[0059] The control part includes a control motor 10, an eccentric disc 9, a connecting rod 11 and an ear plate 12. The axial end of the eccentric disc 9 is fixedly connected to the output shaft of the control motor 10. Among them, the control motor 10 is connected to the factory building foundation, and the rotation of the eccentric disc 9 is controlled by the control motor 10.

[0060] One end of the connecting rod 11 is rotatably connected to the outer wall of the eccentric disc 9, the other end of the connecting rod 11 is rotatably connected to the ear plate 12, and the outer wall of the ear plate 12 is fixedly connected to the outer wall of the screening rack 7. When the control motor 10 controls the rotation of the eccentric disc 9, the screening rack 7 is driven to reciprocate through the connecting rod 11 as the power for screening.

[0061] As a preferred embodiment of the present invention, a bearing platform 21 is fixedly installed on the upper end surface of the screening rack 7, and a transmission screw rod 24 is rotatably installed on the side wall of the bearing platform 21. The transmission screw rod 24 is connected to the bearing platform 21 through a bearing.

[0062] A threaded sleeve 30 is installed on the outer wall of the transmission screw rod 24 through internal and external thread cooperation. The side wall of the bearing plate 25 is fixedly connected to the side wall of the threaded sleeve 30. Rotating the transmission screw rod 24 drives the threaded sleeve 30 to slide along the axis of the transmission screw rod 24, thereby driving the bearing plate 25 to slide and adjusting the horizontal position of the pressing cylinder 22 so as to facilitate the contact of the pressing cylinder 22 with different positions of the screening plate 2.

[0063] A driving motor 20 is fixedly installed on the outer wall of the bearing platform 21. The driving motor 20 controls the rotation of the transmission screw 24 through a gear commutator. The driving motor 20 controls the rotation of the transmission screw 24 through a gear commutator, serving as the power for the horizontal movement of the pressing cylinder 22.

[0064] A rigid tube 31 is fixedly installed at the bottom of the bearing plate 25. In this embodiment, the rigid tube 31 is a copper tube. A connecting cylinder 33 is elastically installed at the bottom of the bearing plate 25. The upper end face of the connecting cylinder 33 is fixedly connected to a spring, and the other end of the spring is fixedly connected to the bottom surface of the bearing plate 25.

[0065] The bottom of the rigid tube 31 extends into the interior of the connecting cylinder 33 and is fixedly installed with a sliding plug 5. The outer wall of the sliding plug 5 is in sliding fit with the inner wall of the connecting cylinder 33. A sealing rubber is provided on the outer wall of the sliding plug 5 to maintain a sealed connection when the connecting cylinder 33 and the rigid tube 31 slide relative to each other.

[0066] The inner cavity of the rigid tube 31 is communicated with the inner cavity of the connecting cylinder 33. When clear water is injected into the rigid tube 31, the water pressure inside the connecting cylinder 33 increases. At this time, the connecting cylinder 33 slides downward. When the water injection stops, the connecting cylinder 33 is controlled to reset by the elastic force received by the connecting cylinder 33, and part of the clear water is discharged.

[0067] The side wall of the pressing cylinder 22 is fixedly connected to the side wall of the connecting cylinder 33. By alternately injecting water into the rigid tube 31 and stopping the water injection, and cooperating with the elastic force received by the connecting cylinder 33, the reciprocating lifting and sliding of the connecting cylinder 33 and the pressing cylinder 22 are controlled, so as to realize the contact and separation from the screening plate 2.

[0068] The inner cavities of the connecting cylinder 33 and the pressing cylinder 22 are communicated with each other. A protective cylinder 17 is sleeved on the outer wall of the pressing cylinder 22. When water is injected into the rigid tube 31, part of the clear water enters the pressing cylinder 22, and then the clear water in the pressing cylinder 22 is discharged, so as to control the water flow and facilitate taking away the heat generated by friction. In this embodiment, the protective cylinder 17 is made of silicone rubber, which plays a protective role when the pressing cylinder 22 and the screening plate 2 collide, and at the same time has a heat conduction effect.

[0069] A control cylinder 18 is fixedly installed on the upper end face of the bearing plate 25. The control cylinder 18 has a liquid inlet and a liquid outlet with one-way conduction, and the conduction directions are opposite. One-way valves are provided in both the liquid inlet and the liquid outlet.

[0070] The liquid inlet is used to connect with the water tank 8, the liquid outlet is used to connect with the rigid pipe 31, and a return nozzle for connecting with the water tank 8 is arranged on the outer wall of the top pressure cylinder 22. When the air pressure in the inner cavity of the control cylinder 18 changes reciprocally, the control cylinder 18 extracts clear water in the water tank 8 through the liquid inlet, and then discharges it to the rigid pipe 31 through the liquid outlet. The clear water inside the top pressure cylinder 22 flows back to the inner cavity of the water tank 8 through the return nozzle, realizing the circulating flow of the water sources inside the top pressure cylinder 22 and the water tank 8, and improving the efficiency of heat dissipation protection. It should be noted that the drainage volume of the liquid outlet is not less than that of the return nozzle, so as to ensure that the top pressure cylinder 22 can slide downward when the liquid outlet drains water.

[0071] A control plug 34 is slidably installed in the inner cavity of the control cylinder 18, and the outer wall of the control plug 34 is hermetically attached to the inner wall of the control cylinder 18. Among them, there are two control plugs 34. When the two control plugs 34 approach each other, the clear water inside the control cylinder 18 is discharged. When the two control plugs 34 move away from each other, the control cylinder 18 extracts the clear water inside the water tank 8.

[0072] A guide plate 23 is fixedly installed on the side wall of the bearing platform 21, and a guide groove 29 is formed on the upper end surface of the guide plate 23. The guide groove 29 is in a "W" shape.

[0073] A transmission rod 32 is slidably installed on the inner wall of the control cylinder 18. One end of the transmission rod 32 is elastically connected to the control plug 34. The transmission rod 32 slides through elasticity to drive the control plug 34 to slide. Among them, the transmission rod 32 and the control plug 34 are elastically connected to prevent the screening plate 2 from hindering the movement of the top pressure cylinder 22 and interfering with the sliding of the control plug 34 when the top pressure cylinder 22 presses against the inclined surface of the screening plate 2.

[0074] A sliding shaft is rotatably installed at one end of the transmission rod 32 away from the control plug 34. The bottom of the sliding shaft extends to the inner wall of the guide groove 29, and the outer wall is slidably attached to the inner wall of the guide groove 29. When the bearing plate 25 slides along the axis of the transmission screw rod 24, the transmission rod 32 moves synchronously. Thus, through the cooperation of the sliding shaft and the guide groove 29, the transmission rod 32 and the control plug 34 slide reciprocally, and further realize the circulating flow of the clear water inside the top pressure cylinder 22 and the water tank 8.

[0075] In this embodiment, the reason for using the transmission rod 32 to slide to drive the control plug 34 to slide and control the flow of clear water instead of using the existing technically mature water pump is that through the cooperation of the transmission rod 32 and the guide groove 29, the sliding speed of the bearing plate 25 and the pressing frequency of the top pressure cylinder 22 can be in a linear relationship. While using a water pump requires designing a speed control program, so that it needs to be repeatedly verified before being put into use. This solution can save costs to a certain extent.

[0076] The above front, back, left, right, up, and down are all based on those in the attached drawings of the specification Figure 1Based on [a certain reference], with the perspective of observing a person as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0078] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening machine for breeding corn seeds, characterized in that: It includes a frame, a control unit, a screening mechanism, a guiding mechanism, a disturbing mechanism and a drainage mechanism; The frame includes a vertical plate (6), a slide rail (3) and a feed hopper (1). The slide rail (3) is fixedly installed on the side wall of the vertical plate (6), and the feed hopper (1) is arranged above the vertical plate (6); The screening mechanism includes a screening frame (7) and a screening plate (2) arranged inside the screening frame (7); The control unit is used to control the reciprocating sliding of the screening frame (7) along the outer wall of the slide rail (3); The guiding mechanism includes a connecting platform (16), a fixed platform (15) and a contact roller (27). The contact roller (27) is connected to the vertical plate (6) through the fixed platform (15), and the connecting platform (16) is fixedly installed on the side wall of the screening frame (7); The disturbing mechanism includes a bearing plate (25) and a pressing cylinder (22). The bearing plate (25) is slidably arranged above the screening frame (7), and the pressing cylinder (22) is arranged at the bottom of the bearing plate (25) in a liftable manner; The drainage mechanism includes a control cylinder (18) and a water tank (8) fixedly installed on the side wall of the vertical plate (6). The liquid in the water tank (8) enters the inner cavity of the pressing cylinder (22) through the control of the inner cavity pressure of the control cylinder (18).

2. The screening machine for breeding corn seeds according to claim 1, wherein: A roller (14) is slidably installed inside the slide rail (3). A guiding frame (13) is fixedly installed on the outer wall of the screening frame (7). A connecting plate (19) is slidably installed inside the guiding frame (13) through an elastic member. The axial end of the roller (14) is rotatably connected to the connecting plate (19) through a pin shaft; A discharge opening is arranged on one side of the screening frame (7). A closing plate (4) is movably arranged at the discharge opening. A control box (26) is fixedly installed on the outer wall of the screening frame (7). A driving member (28) is fixedly installed on the outer wall of the control box (26). A transmission member is arranged inside the control box (26). The driving member (28) controls the rotation of the closing plate (4) through the transmission member.

3. The screening machine for breeding corn seeds according to claim 1, characterized in that: The control unit includes a control motor (10), an eccentric disc (9), a connecting rod (11) and an ear plate (12); The axial end of the eccentric disc (9) is fixedly connected to the output shaft of the control motor (10); One end of the connecting rod (11) is rotatably connected to the outer wall of the eccentric disc (9), the other end of the connecting rod (11) is rotatably connected to the ear plate (12), and the outer wall of the ear plate (12) is fixedly connected to the outer wall of the screening frame (7).

4. A screening machine for corn seed breeding according to claim 1, characterized in that: A bearing platform (21) is fixedly installed on the upper end surface of the screening frame (7). A transmission screw (24) is rotatably installed on the side wall of the bearing platform (21). A threaded sleeve (30) is installed on the outer wall of the transmission screw (24) through internal and external thread cooperation. The side wall of the bearing plate (25) is fixedly connected to the side wall of the threaded sleeve (30). A driving motor (20) is fixedly installed on the outer wall of the bearing platform (21). The driving motor (20) controls the rotation of the transmission screw (24) through a gear commutator.

5. The screening machine for corn seed breeding according to claim 4, characterized in that: A rigid tube (31) is fixedly installed at the bottom of the bearing plate (25). A connecting cylinder (33) is elastically installed at the bottom of the bearing plate (25). The bottom of the rigid tube (31) extends into the interior of the connecting cylinder (33) and is fixedly installed with a sliding plug (5). The outer wall of the sliding plug (5) is in sliding fit with the inner wall of the connecting cylinder (33). The inner cavity of the rigid tube (31) is communicated with the inner cavity of the connecting cylinder (33). The side wall of the pressing cylinder (22) is fixedly connected to the side wall of the connecting cylinder (33), and the inner cavities are communicated with each other. A protective cylinder (17) is sleeved on the outer wall of the pressing cylinder (22).

6. The screening machine for corn seed breeding according to claim 5, characterized in that: The control cylinder (18) is fixedly installed on the upper end surface of the bearing plate (25). The control cylinder (18) has a liquid inlet and a liquid outlet with one-way conduction and opposite conduction directions. The liquid inlet is used to connect with the water tank (8), and the liquid outlet is used to connect with the rigid tube (31). A return nozzle for connecting with the water tank (8) is arranged on the outer wall of the pressing cylinder (22). A control plug (34) is slidably installed in the inner cavity of the control cylinder (18). The outer wall of the control plug (34) is in sealing fit with the inner wall of the control cylinder (18).

7. The screening machine for breeding corn seeds according to claim 6, characterized in that: A guide plate (23) is fixedly installed on the side wall of the bearing table (21). A guide groove (29) is formed on the upper end surface of the guide plate (23). A transmission rod (32) is slidably installed on the inner wall of the control cylinder (18). One end of the transmission rod (32) is elastically connected to the control plug (34). A sliding shaft is rotatably installed at the end of the transmission rod (32) away from the control plug (34). The bottom of the sliding shaft extends into the inner wall of the guide groove (29), and the outer wall is in sliding fit with the inner wall of the guide groove (29).

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