A screening machine for corn seed breeding

Abstract

The present invention belongs to the technical field of sieve plate screening, and specifically is a screening machine for corn seed breeding, comprising a frame, a control unit, a screening mechanism, a guide mechanism, a disturbance mechanism and a drainage mechanism; the frame comprises a vertical plate, a slide rail and a feed hopper, the slide rail is fixedly mounted on the side wall of the vertical plate, and the feed 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 unit is used to control the screening frame to slide back and forth along the outer wall of the slide rail; the guide mechanism comprises 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 mounted on the side wall of the screening frame; the disturbance mechanism comprises a bearing plate and a top pressure cylinder, the bearing plate is slidably arranged above the screening frame, and the top pressure cylinder is liftably arranged at the bottom of the bearing plate; the above-mentioned structural combination can prevent the screening plate from being blocked, and the vibration of the screening plate is changed to the superposition of inherent vibration and interference vibration, thereby maintaining the screening efficiency.

Description

Technical Field

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

[0002] In modern agricultural production, corn seed screening is a key link in ensuring seed quality and subsequent planting effects. At present, most common corn seed screening equipment on the market adopts a working mode in which the sieve plate moves back and forth in the horizontal direction. This screening method mainly utilizes the horizontal movement of the sieve plate to make the corn seeds continuously roll and move on the sieve surface, thereby realizing the separation of seeds of different sizes and shapes.

[0003] However, this screening mechanism has significant drawbacks that seriously affect screening efficiency. On the one hand, the horizontal reciprocating motion of the screen plate results in a relatively simple movement path of the seeds on the screen surface, which limits the contact frequency and contact angle between the seeds and the screen holes. A large number of seeds need to pass through the screen surface multiple times to complete screening, which increases screening time and energy consumption.

[0004] On the other hand, the frequent changes in acceleration and speed of the screen plate during its horizontal reciprocating motion affect the stability of the equipment operation, making it prone to problems such as jamming and sieve hole blockage, 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 and impact can easily cause damage to the seed skin and embryo. Seed damage will not only reduce the germination rate and survival rate of the seeds, but also affect the subsequent planting yield.

[0006] To this end, 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, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: the screening machine for corn seed breeding of the present invention comprises a frame, a control part, a screening mechanism, a guide mechanism, a disturbance 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 in the screening frame;

[0011] The control unit is used to control the screening rack to slide back and forth along the outer wall of the slide rail;

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

[0013] The disturbance mechanism includes a bearing plate and a top pressure cylinder. The bearing plate is slidably arranged above the screening frame, and the top pressure cylinder is liftably arranged at the bottom of the bearing plate.

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

[0015] Preferably, a roller is slidably mounted inside the slide rail, a guide frame is fixedly mounted on the outer wall of the screening rack, a connecting plate is slidably mounted inside the guide frame via an elastic member, and the axial end of the roller is rotatably connected to the connecting plate via a pin shaft;

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

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

[0018] The axial end of the eccentric disk 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 rack, a transmission screw is rotatably installed on the side wall of the bearing platform, a threaded sleeve is installed on the outer wall of the transmission screw through internal and external threads, 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, and the driving motor controls the rotation of the transmission screw through a gear commutator.

[0021] Preferably, a hard tube is fixedly mounted on the bottom of the supporting plate, a connecting tube is elastically mounted on the bottom of the supporting plate, the bottom of the hard tube extends into the interior of the connecting tube and is fixedly mounted with a sliding plug, the outer wall of the sliding plug is slidably fitted with the inner wall of the connecting tube, and the inner cavity of the hard tube is connected to the inner cavity of the connecting tube;

[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. The outer wall of the pressing cylinder is sleeved with a protective cylinder.

[0023] Preferably, the control cylinder is fixedly mounted on the upper end surface of the bearing plate, and has a unidirectional liquid inlet and a liquid outlet with opposite conduction directions. The liquid inlet is used to connect to the water tank, and the liquid outlet is used to connect to the hard pipe. The outer wall of the top pressure cylinder is provided with a reflux nozzle for connecting to the water tank.

[0024] A control plug is slidably mounted in the inner cavity of the control cylinder, and the outer wall of the control plug is sealed and fitted with the inner wall of the control cylinder.

[0025] Preferably, a guide plate is fixedly mounted on the side wall of the bearing platform, and a guide groove is provided on the upper end surface of the guide plate;

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

[0027] A sliding shaft is rotatably mounted on one end of the transmission rod away from the control plug, the bottom of the sliding shaft extends to the inner wall of the guide groove, and the outer wall is slidably fitted with the inner wall of the guide groove.

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

[0029] 1. The present invention provides a guide mechanism. During the reciprocating sliding of the screening frame, the contact roller cooperates with the notch at the bottom of the connecting platform to control the screening frame and the screening plate to slide back and forth in the horizontal direction, so that they have a synchronous up and down sliding motion state, disperse the accumulated seed groups, and give more seeds the opportunity to contact the sieve holes, thereby improving the efficiency of seed screening. A top pressure cylinder is also provided. During screening, the top pressure cylinder is controlled to reciprocate and fit the vibrating screening plate, thereby scraping the surface of the screening plate and peeling off the seeds trapped in the mesh of the screening plate, preventing the screening plate from being blocked and maintaining the screening efficiency. At the same time, when the top pressure cylinder fits the screening plate, an external periodic interference force is applied to the screening plate, so that the vibration of the screening plate becomes a superposition of the inherent vibration and the interference vibration. The jumping height, landing position and movement direction of the seed particles become more random, further improving the screening efficiency.

[0030] 2. The present invention injects clean water into the top pressure cylinder when the top pressure cylinder and the screening plate are in contact. On the one hand, it can absorb the heat generated by friction and protect the top pressure cylinder and the screening plate. At the same time, the top pressure cylinder with clean water stored inside absorbs the energy of the screening plate's own vibration through the inertial mass of water and fluid damping, effectively suppressing the high-frequency self-vibration and irregular jitter of the screen, making the screening process more stable and efficient, while reducing mechanical loss and noise, and at the same time reducing the impact load between the screening plate and the seeds, reducing the seed screening loss after drying. 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 present invention as a whole;

[0033] Figure 2 This is a schematic diagram of the installation of the screening frame of the present invention;

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

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

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

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

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

[0039] Figure 8 It is a schematic diagram of the installation 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 disk; 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. drive motor; 21. bearing platform; 22. top pressure cylinder; 23. guide plate; 24. transmission screw; 25. bearing plate; 26. control box; 27. contact roller; 28. driving member; 29. guide groove; 30. threaded sleeve; 31. hard pipe; 32. transmission rod; 33. connecting cylinder; 34. control plug. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0042] Example 1: Figures 1 to 8 As shown, the present invention provides a screening machine for corn seed breeding, which includes a frame, a control unit, a screening mechanism, a guide mechanism, a disturbance 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 be connected to the factory floor, and two vertical plates are arranged parallel to each other. The feed hopper 1 is used for entering corn seeds after preliminary processing (preliminary processing is to remove large internal impurities such as soil blocks, corn cob fragments, etc.).

[0044] The screening mechanism includes a screening frame 7 and a screening plate 2 arranged in the screening frame 7. In this embodiment, the screening frame 7 is an aluminum alloy frame, and the screening plate 2 is a wire screen (the mesh size of which 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 screening rack 7 to slide back and forth along the outer wall of the slide rail 3, wherein the screening plate 2 is located directly below the feed hopper 1, and the corn seeds passing through the feed hopper 1 fall above the screening plate 2. The screening rack 7 slides back and forth to realize the screening of the corn seeds (when screening seeds, large and plump individuals are retained). A waste discharge plate is set on the side wall of the vertical plate 6. The dried and broken seeds pass through the screening plate 2 and fall onto the waste discharge plate and are discharged. The plump seeds remain above the screening plate 2, thereby realizing the screening of corn seeds.

[0046] 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. The outer wall of the fixed platform 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 platform 15 through a bracket. The connecting platform 16 is fixedly mounted on the side wall of the screening rack 7. An arc-shaped notch is opened at the bottom of the connecting platform 16, and the outer wall of the contact roller 27 is in real-time contact with the bottom of the connecting platform 16.

[0047] During the reciprocating sliding of the screening rack 7, the contact roller 27 cooperates with the notch at the bottom of the connecting platform 16 to control the screening rack 7 and the screening plate 2 to slide back and forth in the horizontal direction, and synchronously have an up and down sliding motion state. The vibration or bumps generated by the up and down sliding can make the seeds jump continuously in the vertical direction, disperse the accumulated seed groups, and give more seeds 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 that only has a single method of movement, it can effectively improve the efficiency of seed screening.

[0048] The disturbance mechanism includes a supporting plate 25 and a top pressure cylinder 22. The supporting plate 25 is slidably arranged above the screening rack 7, and the top pressure cylinder 22 is liftably arranged at the bottom of the supporting plate 25. The supporting plate 25 slides horizontally above the screening rack 7, and the top pressure cylinder 22 can be lifted and slid at the bottom of the supporting plate 25.

[0049] During the screening process, the top pressure cylinder 22 is controlled to reciprocate and fit with the vibrating screening plate 2 (because the material of the screening plate 2 itself is elastic, it will inevitably vibrate itself under the influence of external mechanical movement during the screening process), and cooperate with the movement of the screening plate 2 itself (horizontal and vertical movements), so as to scrape the surface of the screening plate 2, peel off the seeds mixed in the mesh of the screening plate 2, prevent the screening plate 2 from being blocked, and maintain the screening efficiency.

[0050] When the screening plate 2 vibrates normally (such as moving only up and down), its vibration frequency is fixed, and the seed particles tend to form regular movements (such as jumping along a fixed trajectory), causing some particles to repeatedly jump over the sieve holes and fail to pass through the sieve. When the top pressure cylinder 22 is in contact with the screening plate 2, an external periodic interference force is applied to the screening plate 2, causing the vibration of the screening plate 2 to become a superposition of inherent 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 jumping 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 pressure in the inner cavity of the control cylinder 18 is controlled to control the liquid in the water tank 8 to enter the inner cavity of the top pressure cylinder 22. The water tank 8 stores clean water (damping liquid can be selected. Clean water is selected in this embodiment to save costs). The pressure change in the inner cavity of the control cylinder 18 supplies water to the top pressure cylinder 22. At the same time, due to the arrangement of the water tank 8, when the vertical plate 6 vibrates, the water body has a movement trend in the opposite direction of the vertical plate 6 due to inertia, forming an inertial 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 entire machine (vibration that generates noise, such as the vibration of the vertical plate 6 and the useless vibration of the internal structure), thereby maximizing buffering, shock absorption and noise reduction.

[0052] After the top pressure cylinder 22 is fitted with the screening plate 2, sliding friction occurs between the screening plate 2 and the top pressure cylinder 22, causing heat to be generated at the contact position. Clean water is injected into the top pressure cylinder 22 to absorb the heat generated by friction, thereby protecting the top pressure cylinder 22 and the screening plate 2.

[0053] In addition, the top pressure cylinder 22 with clean water stored inside absorbs the energy of the vibration of the screening plate 2 itself through the inertial mass of water and fluid damping, effectively suppressing the high-frequency self-vibration and irregular shaking of the screen, making the screening process more stable and efficient, while reducing mechanical loss and noise, and at the same time reducing the impact load between the screening plate 2 and the seeds, reducing the seed screening loss after drying (the seeds collide with the vibrating screening plate 2, resulting in breakage, i.e. screening loss).

[0054] A roller 14 is slidably installed inside the slide rail 3, and the outer wall of the roller 14 rolls in contact with the inner wall of the slide rail 3. A guide frame 13 is fixedly installed on the outer wall of the screening rack 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, thereby providing horizontal sliding support for the screening rack 7. At the same time, the elastic connection between the guide frame 13 and the connecting plate 19 provides guidance for the vertical sliding of the screening rack 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 tilted. After the screening is completed, the top pressure cylinder 22 is controlled to remain separated from the screening plate 2. At this time, the discharge opening is opened, and during the reciprocating motion of the screening rack 7, qualified seeds are discharged through the discharge hopper.

[0056] A closing plate 4 is movably provided 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 mounted on the outer wall of the screening rack 7 , and a driving member 28 is fixedly mounted on the outer wall of the control box 26 . The driving member 28 is a common servo motor.

[0058] A transmission part is provided inside the control box 26, and the driving part 28 controls the rotation of the closing plate 4 through the transmission part. The transmission part is a worm gear that meshes with each other, and both are rotatably arranged inside the control box 26. One end of the worm is fixedly connected to the output shaft of the driving part 28, and the axial end of the worm wheel is connected to the closing plate 4. When the driving part 28 controls the rotation of the worm, the closing plate 4 is driven to rotate by the worm gear, which is used to control the closing and conduction of the discharge opening.

[0059] The control part includes a control motor 10, an eccentric disk 9, a connecting rod 11 and an ear plate 12. The axial end of the eccentric disk 9 is fixedly connected to the output shaft of the control motor 10. The control motor 10 is connected to the foundation of the factory building, and the rotation of the eccentric disk 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 disk 9, and the other end of the connecting rod 11 is rotatably connected to the ear plate 12. The outer wall of the ear plate 12 is fixedly connected to the outer wall of the screening frame 7. When the control motor 10 controls the eccentric disk 9 to rotate, the screening frame 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 supporting platform 21 is fixedly mounted on the upper end surface of the screening rack 7 , a transmission screw 24 is rotatably mounted on the side wall of the supporting platform 21 , and the transmission screw 24 is connected to the supporting platform 21 via a bearing.

[0062] The outer wall of the transmission screw 24 is equipped with a threaded sleeve 30 through internal and external threads. The side wall of the supporting plate 25 is fixedly connected to the side wall of the threaded sleeve 30. Rotating the transmission screw 24 drives the threaded sleeve 30 to slide along the axis of the transmission screw 24, thereby driving the supporting plate 25 to slide and adjust the horizontal position of the top pressure cylinder 22 so that the top pressure cylinder 22 can contact different positions of the screening plate 2.

[0063] A drive motor 20 is fixedly mounted on the outer wall of the support platform 21 , and the drive 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 hard tube 31 is fixedly installed on the bottom of the supporting plate 25. In this embodiment, the hard tube 31 is a copper tube. A connecting tube 33 is elastically installed on the bottom of the supporting plate 25. The upper end surface of the connecting tube 33 is fixedly connected to a spring, and the other end of the spring is fixedly connected to the bottom surface of the supporting plate 25.

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

[0066] The inner cavity of the hard tube 31 is connected to the inner cavity of the connecting tube 33. Clean water is injected into the hard tube 31, causing the water pressure inside the connecting tube 33 to increase. At this time, the connecting tube 33 slides downward. When the water injection stops, the elastic force acting on the connecting tube 33 controls the connecting tube 33 to reset and discharge some clean water.

[0067] The side wall of the top pressure cylinder 22 is fixedly connected to the side wall of the connecting cylinder 33. By reciprocatingly injecting water into and stopping water injection into the hard tube 31, and cooperating with the elastic force exerted on the connecting cylinder 33, the connecting cylinder 33 and the top pressure cylinder 22 are controlled to rise and fall and slide reciprocally, thereby achieving contact and separation with the screening plate 2.

[0068] The inner cavities of the connecting tube 33 and the top pressure tube 22 are connected to each other. The outer wall of the top pressure tube 22 is provided with a protective tube 17. When water is injected into the hard tube 31, part of the clean water enters the top pressure tube 22, and then the clean water in the top pressure tube 22 is discharged, thereby controlling the flow of water to take away the heat generated by friction. In this embodiment, the protective tube 17 is made of silicone rubber, which plays a protective effect when the top pressure tube 22 collides with the screening plate 2, and also has a heat conduction effect.

[0069] The control cylinder 18 is fixedly mounted on the upper end surface of the carrier plate 25 . The control cylinder 18 has a one-way liquid inlet and a liquid outlet, and the conducting directions are opposite. A one-way valve is provided in each of the liquid inlet and the liquid outlet.

[0070] The liquid inlet is used to connect with the water tank 8, the liquid discharge port is used to connect with the hard tube 31, and the outer wall of the top pressure cylinder 22 is provided with a reflux nozzle for connecting with the water tank 8. When the air pressure in the inner cavity of the control cylinder 18 changes back and forth, the control cylinder 18 draws clean water from the water tank 8 through the liquid inlet, and then discharges it to the hard tube 31 through the liquid discharge port. The clean water inside the top pressure cylinder 22 flows back to the inner cavity of the water tank 8 through the reflux nozzle, realizing the circulation flow of the water source inside the top pressure cylinder 22 and the water tank 8, thereby improving the efficiency of heat dissipation protection. It should be noted that the discharge volume of the liquid discharge port is not lower than the discharge volume of the reflux nozzle, thereby ensuring that the top pressure cylinder 22 can slide downward when the liquid discharge port is draining.

[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 sealed and fitted with the inner wall of the control cylinder 18. There are two control plugs 34. When the two control plugs 34 are close to each other, the clean water inside the control cylinder 18 is discharged. When the two control plugs 34 are away from each other, the control cylinder 18 draws the clean water inside the water tank 8.

[0072] A guide plate 23 is fixedly mounted on the side wall of the supporting platform 21 . 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, and one end of the transmission rod 32 is elastically connected to the control plug 34. The sliding transmission rod 32 drives the control plug 34 to slide through the elasticity. The transmission rod 32 and the control plug 34 are elastically connected to prevent the screening plate 2 from obstructing the movement of the pressing cylinder 22 and interfering with the sliding of the control plug 34 when the pressing cylinder 22 presses 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 slides in fit with the inner wall of the guide groove 29. When the supporting plate 25 slides along the axis of the transmission screw 24, the transmission rod 32 moves synchronously, thereby controlling the reciprocating sliding of the transmission rod 32 and the control plug 34 through the cooperation of the sliding shaft and the guide groove 29, thereby realizing the circulation of clean water in the top pressure cylinder 22 and the water tank 8.

[0075] In this embodiment, the reason why the transmission rod 32 is used to slide and drive the control plug 34 to slide to control the flow of clean water instead of using the existing technologically 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 top pressure frequency of the top pressure cylinder 22 can be made linearly related. The use of a water pump requires the design of a speed control program, so that it needs to be repeatedly checked before being put into use. This solution can save costs to a certain extent.

[0076] The above-mentioned front, back, left, right, up and down are all based on the Figure 1As a benchmark, according to the person's observation perspective, 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 terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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, and therefore should not be understood as limiting the scope of protection of the present invention.

[0078] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening machine for corn seed breeding, characterized by: It includes a frame, a control part, a screening mechanism, a guiding mechanism, a disturbing mechanism and a drainage mechanism; The frame comprises a vertical plate (6), a slide rail (3) and a feed hopper (1), wherein the slide rail (3) is fixedly mounted on the side wall of the vertical plate (6), and the feed hopper (1) is arranged above the vertical plate (6); The screening mechanism comprises a screening frame (7) and a screening plate (2) arranged in the screening frame (7); The control unit is used to control the screening rack (7) to slide back and forth along the outer wall of the slide rail (3); The guide mechanism includes a connecting platform (16), a fixing platform (15) and a contact roller (27), wherein the contact roller (27) is connected to the vertical plate (6) via the fixing platform (15), and the connecting platform (16) is fixedly mounted on the side wall of the screening frame (7); The disturbance mechanism comprises a bearing plate (25) and a top pressure cylinder (22), wherein the bearing plate (25) is slidably arranged above the screening frame (7), and the top pressure cylinder (22) is liftably arranged at the bottom of the bearing plate (25); The drainage mechanism comprises a control cylinder (18) and a water tank (8) fixedly mounted on the side wall of the vertical plate (6), and controls the liquid in the water tank (8) to enter the inner cavity of the top pressure cylinder (22) through the inner cavity pressure of the control cylinder (18).

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

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

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

5. The corn seed breeding screening machine according to claim 4, characterized in that: A hard tube (31) is fixedly mounted on the bottom of the carrier plate (25), a connecting tube (33) is elastically mounted on the bottom of the carrier plate (25), the bottom of the hard tube (31) extends into the interior of the connecting tube (33) and a sliding plug (5) is fixedly mounted thereon, the outer wall of the sliding plug (5) is slidably fitted with the inner wall of the connecting tube (33), and the inner cavity of the hard tube (31) is communicated with the inner cavity of the connecting tube (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. The outer wall of the pressing cylinder (22) is provided with a protective cylinder (17).

6. The corn seed breeding screening machine according to claim 5, characterized in that: The control cylinder (18) is fixedly mounted on the upper end surface of the carrier plate (25). The control cylinder (18) has a unidirectional liquid inlet and a liquid outlet, and the conducting directions are opposite. The liquid inlet is used to connect to the water tank (8), and the liquid outlet is used to connect to the hard pipe (31). The outer wall of the top pressure cylinder (22) is provided with a reflux nozzle for connecting to the water tank (8); A control plug (34) is slidably mounted in the inner cavity of the control cylinder (18), and the outer wall of the control plug (34) is in sealing contact with the inner wall of the control cylinder (18).

7. A corn seed breeding screening machine according to claim 6, characterized in that: A guide plate (23) is fixedly mounted 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); A transmission rod (32) is slidably mounted on the inner wall of the control cylinder (18), and one end of the transmission rod (32) is elastically connected to the control plug (34); A sliding shaft is rotatably mounted on 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 in sliding contact with the inner wall of the guide groove (29).

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