Centrifugal screening integrated seed screening machine

Abstract

The utility model discloses a centrifugal screening integrated seed screening machine which is characterized in that a centrifugal mechanism is adopted to form a spiral conveying structure, and a spiral shaft is utilized to form centrifugal force to separate impurities from a screen barrel, and then the impurities are discharged through an impurity discharge port; the screening mechanism is adopted to form an up-down step-by-step screening structure, and the materials are swept by the blade part, are screened step by step through the screening plate and then flow out of the screening discharge port; therefore, automatic and accurate screening and classification are achieved, and the screening efficiency is effectively improved. The centrifugal screening integrated seed screening machine aims at achieving efficient removal of impurities in seeds and accurate screening of seeds of different qualities, and the design flexibility of the centrifugal screening integrated seed screening machine allows the aperture size of the screening plate to be adjusted, so that the centrifugal screening integrated seed screening machine is widely suitable for the treatment requirements of various types of seeds.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of seed screening machinery technical field, especially a machine that can automatically separate impurities and screen seeds. BACKGROUND

[0002] Artificial screening efficiency is lower and needs to consume huge artificial cost, so a high-efficiency screening machine is needed, which removes impurities and selects fine seeds through accurate screening and classification, to ensure that the quality of final product meets standards and requirements, to avoid the cost and labor intensity of artificial screening, reduce manpower investment, and improve production screening efficiency. UTILITY MODEL CONTENT

[0003] The utility model aims at the above problems, provides a centrifugal screening integrated seed screening machine, to realize the efficient removal of impurities in seeds and the accurate screening of seeds of different qualities, and the design flexibility allows the aperture size of the screening plate to be adjusted, thereby being widely applicable to the processing needs of various types of seeds, with low noise, small footprint, easy to transport, and more suitable for traditional small farmers and agricultural cooperatives to automate and intelligentize seed screening.

[0004] To achieve the above object, the utility model employs the technical scheme of:

[0005] The centrifugal screening integrated seed screening machine includes a centrifugal mechanism and a screening mechanism. The centrifugal mechanism includes a screen drum, a housing, a spiral shaft and a centrifugal motor. The spiral shaft is rotatably arranged in the housing. The front end of the spiral shaft is drivingly connected with the centrifugal motor. The middle part of the housing is provided with the screen drum to separate the seed cavity and the impurity cavity. The front end of the housing is provided with a centrifugal feed inlet. The end of the housing is provided with a seed discharge outlet communicating with the seed cavity. The middle part of the housing is provided with an impurity discharge outlet communicating with the impurity cavity. The screening mechanism includes a screening box, a vane shaft, a screening plate and a screening motor. The top of the screening box is provided with a screening feed inlet. The screening box is arranged below the housing, and the screening feed inlet is below the seed discharge outlet. At least one screening plate is arranged in the screening box from top to bottom to separate at least two screening chambers. The bottom side of each screening chamber is provided with a screening discharge outlet. The vane shaft is rotatably arranged in the screening box and extends upward and downward. The vane shaft is provided with a vane part corresponding to the bottom of each screening chamber. The bottom end of the vane shaft is drivingly connected with the screening motor.

[0006] The screen drum has a cylindrical structure with both ends open. The end of the screen drum is connected to the inner wall of the housing. The front end of the housing is radially contracted to form a contraction wall. The front end of the screen drum is connected to the contraction wall. The spiral shaft cooperates with the front end of the housing and the inner wall of the screen drum to form a spiral conveying structure.

[0007] The screen cylinder is between the shell and the spiral shaft, and the outer periphery of the screen and the inner wall of the shell form an impurity chamber, and the spiral shaft and the inner periphery of the screen and the inner wall of the shell form a seed chamber.

[0008] The driving shaft of the centrifugal motor is connected with a driving gear, the front end of the spiral shaft is connected with a driven gear, the driving gear is connected with the driven gear in meshing connection, and the gear transmission connection structure is selected, and other belt transmission connections are also provided.

[0009] The screen holes of at least one screen plate are gradually reduced in size from top to bottom, forming a gradual screening structure.

[0010] The driving shaft of the screening motor is connected with a main crank, the bottom end of the blade shaft is connected with a secondary crank, the main crank is connected with the secondary crank through a connecting rod, and the connecting rod transmission connection structure is selected, and other gear transmission connections are also provided.

[0011] As described above, the centrifugal mechanism is used to form a spiral conveying structure, the spiral shaft is used to form a centrifugal force to separate the impurities from the screen cylinder, and then the impurities are discharged through the impurity discharge port; the screening mechanism is used to form an up-down step-by-step screening structure, the impurities are swept by the blade part and are step-by-step screened by the screen plate, and then flow out from the screening discharge port; thereby, automatic and accurate screening and classification are realized, and the screening efficiency is effectively improved.

[0012] Based on the foregoing scheme, in an improved scheme, the ends of the screen cylinder and the shell are inclined downward by 5°-30°, forming a certain inclination angle, to assist the seeds to flow downstream.

[0013] Based on the foregoing scheme, in an improved scheme, the impurity discharge port is directly below the screen, and it extends outward beyond the screening mechanism, avoiding accidental leakage of impurities falling on the screening mechanism.

[0014] Based on the foregoing scheme, in an improved scheme, the screening discharge ports of each screening chamber are staggered with the impurity discharge port, and the adjacent two screening discharge ports are staggered by 30°-90°, so as to facilitate the arrangement of the collecting devices and avoid mutual influence. Preferably, all the screening discharge ports are staggered and arranged by rotating back and forth from top to bottom; for example, the first one is at 0°, the second one is at 45°, the third one is at 0°, and the fourth one is at 45°; for example, the first one is at 0°, the second one is at -45°, the third one is at 0°, and the fourth one is at -45°; in this way, there are only two convex points in the horizontal projection, and relative to the other three convex points, the convex space can be controlled, which is more convenient for arrangement.

[0015] Based on the foregoing scheme, in an improved scheme, the bottom of the screening box is provided with a bottom plate to separate the equipment chamber below the bottom plate, the bottom end of the blade shaft is rotatably connected to the bottom surface of the bottom plate through a bearing and a shaft sleeve, the screening motor is arranged in the equipment chamber, and the driving shaft of the screening motor is arranged in the vertical direction. In this way, a special equipment chamber structure is provided, which plays a protective role.

[0016] Based on the foregoing scheme, in an improved scheme, the middle outer wall of the shell is installed on the top outer wall of the screening box through a U-shaped frame, and the end outer wall of the shell is installed on the top outer wall of the screening box through a triangular frame, thereby playing a fixing role and improving the connection stability.

[0017] Due to the adoption of the above technical scheme, the centrifugal screening integrated seed screening machine has the following beneficial effects:

[0018] 1. The centrifugal screening integrated seed screening machine adopts a spiral feed inlet model. The special design of the spiral feed inlet can continuously drive the seeds into the centrifugal machine, ensure the amount of the seeds within a certain range, prevent the machine from being blocked due to too many seeds, and prevent the efficiency from being affected due to too few seeds, and protect the seeds.

[0019] 2. The centrifugal speed is adjustable. The seeds entering the centrifugal machine are driven to rotate by the fixed blades, and the impurities are separated from the seeds in the rotation and filtered out through the small holes of the cylindrical screen. The centrifugal speed is adjustable, which can ensure the stable performance of the machine and can be flexibly used for various types of seeds.

[0020] 3. The gravity plays a main role, and the power is saved. The screening machine has a vertical structure, mainly uses the gravity to screen the seeds, and the blades of the screening machine play an auxiliary role to drive the seeds to rotate at a low speed.

[0021] 4. The screening machine can realize one machine with multiple uses by replacing the screening plates, and screen different types of seeds.

[0022] 5. The seed screening machine is simple to operate, low in manufacturing cost, and meets the needs of consumers. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the utility model.

[0024] Figure 2 is a centrifugal mechanism structural schematic view of Figure 1 .

[0025] Figure 3 is a screening mechanism screening box and blade shaft structural schematic view of Figure 2 .

[0026] Figure 4 is a screening mechanism screening motor, crank, connecting rod and shaft sleeve structural schematic view of Figure 2 .

[0027] In the drawings, 1, centrifugal feed inlet, 2, driving gear, 3, driven gear, 4, screen cylinder, 5, shell, 6, impurity discharge port, 7, seed discharge port, 8, spiral shaft, 9, support, 10, screening feed inlet, 11, blade shaft, 111, blade part, 12, screening plate, 13, screening box, 14, screening discharge port, 15, bottom plate, 16, shaft sleeve, 17, bearing, 18, vice crank, 19, connecting rod, 20, main crank, 21, screening motor. DETAILED DESCRIPTION

[0028] EMBODIMENT

[0029] As described above, the centrifugal screening integrated seed screening machine of the present application has a basic scheme and improved schemes, such as the addition of a screen cylinder and a shell inclined arrangement feature based on the basic scheme, the addition of a screening discharge port staggered arrangement structure based on the basic scheme, the addition of a bottom plate divided into an equipment cavity to install a screening motor feature based on the basic scheme, etc. The following will take the best application example of all feature combinations as an example to further supplement the description.

[0030] Referring to Figures 1-4 The centrifugal screening integrated seed screening machine of the present embodiment can filter out impurities in seeds and screen different specifications of seeds. It includes a centrifuge and a screening machine, which mainly includes a feed inlet 1, a cylindrical screen (screen cylinder) 4, a spiral shaft 8, a blade shaft 11, a screening plate 12, a screening box 13, a bottom plate 15, a shaft sleeve 16, a bearing 17, a vice crank 18, a connecting rod (rocker) 19, a main crank 20, and a motor (screening motor) 21.

[0031] The driving gear 2 rotates through the driven gear 3 to drive the spiral shaft 8 to rotate, filtering out the impurities with light mass and small volume in the seeds entering from the feed inlet (centrifugal feed inlet) 1, and the impurities leave from the impurity discharge port 6. The seeds with larger volume fall into the screening machine from the centrifuge discharge port 7.

[0032] Specifically, the configured motor (centrifugal motor) drives the gear (driving gear and driven gear) to rotate to drive the centrifuge rotating shaft (screw shaft) to rotate, thereby driving the seed to rotate in the round hole screen to achieve the purpose of centrifugation. The motor provides power for the centrifuge, and the gear is engaged with the gear in the device (centrifuge) to drive the rotation of the shaft. The rotating shaft is divided into two parts, the spiral feeding part (corresponding to the front end of the shell) and the fixed blade part (corresponding to the middle and rear end of the shell), and the seeds containing impurities (such as sand) pass through the spiral feeding part after entering the inlet, and the spiral structure drives the seeds to rotate to feed the seeds into the centrifuge. After entering the centrifuge, the fixed blade drives the seeds and impurities to rotate at high speed for centrifugation. The seeds and impurities rotate at high speed due to the driving of the blade, and the impurities with small mass and volume are filtered out from the small holes of the cylindrical screen, and leave the device from the waste outlet (impurity outlet); the seeds with large mass and volume leave the device from the centrifuge outlet and fall into the screening machine.

[0033] The motor 21 provides power for the screening machine, thereby rotating the main crank, rocker and vice crank, and driving the rocker 19 and vice crank 18 to rotate through the main crank 20, thereby driving the blade shaft 11 to rotate. The blades on the shaft push each layer of seeds to rotate, thereby pushing the crops with the same diameter to the discharge outlet 14, and pushing the seeds with different diameters to fall into the next screening chamber of the different screening boxes 13 through the screening plate 12, and finally the smallest seeds fall onto the bottom plate 15.

[0034] The shaft sleeve is in the form of a tapered cylinder, and the inner wall is provided with a groove. A radially protruding clamping protrusion is arranged at the bottom end of the blade shaft, and the clamping protrusion is matched with the groove and inserted into the groove, thereby further stabilizing the connection.

[0035] The shell of the centrifuge and the screening box of the screening mechanism are connected through the connecting support (U-shaped bracket and triangular bracket) 9.

[0036] As described above, the seeds with impurities filtered out by the centrifuge fall into the screening mechanism. The seeds in the first layer of the screening box are pushed by the blades and rotate in the first layer of the screening chamber. The blades stir the seeds to pass through the holes on the screening plate. The seeds with a diameter larger than the hole diameter remain in the current screening chamber, and the seeds with a diameter smaller than the hole diameter fall into the next layer of the screening chamber for the next round of screening. This process is repeated until all the seeds are screened.

[0037] The driving gear of the centrifugal motor is engaged with the gear at the front end of the spiral shaft of the centrifugal machine, to drive the spiral shaft to rotate at high speed. The seeds to be screened are introduced into the centrifugal machine through the feeding port, and then smoothly fed into the core area of the centrifugal machine through the spiral conveying part of the spiral shaft. Inside the centrifugal machine, the fixed blade assembly works at high speed, and uses centrifugal force to effectively separate the seeds and impurities. The impurities are captured by the micropores on the cylindrical screen and smoothly discharged outside the device through the impurity outlet. The separated seeds pass through the seed discharge port of the centrifugal machine, and then are sent into the screening machine through the screening feeding port for further processing.

[0038] The bottom of the screening machine is provided with a special motor, which is the power source of the precision screening module, drives the double crank mechanism to work cooperatively, and then drives the blade shaft to rotate. The paddle (blade part) installed on the blade shaft will move the seeds in the screening chamber to rotate, so that the seeds can pass through the pre-set aperture on the screening plate one by one. In this process, the seeds with a size larger than the aperture will be directly discharged from the discharge port, and the seeds with a size smaller than the aperture will fall into the next screening chamber for more precise screening and grading. This process will continue until all the seeds are screened and graded.

[0039] The spiral shaft of the centrifugal machine, the spiral feeding port part, the special design of the spiral not only continuously drives the seeds into the centrifugal machine, ensures the amount of seeds within a certain range, improves the work efficiency, and the spiral design can protect the seeds.

[0040] The spiral shaft of the centrifugal machine, the fixed blade part, the seeds entering the centrifugal machine are driven to rotate by the fixed blade, and the impurities are separated from the seeds in rotation and filtered out through the small holes of the cylindrical screen. Therefore, by adjusting the different gears of the motor of the device, the centrifugal speed can be adjusted, which can ensure the stable performance of the machine and can be flexibly used for various types of seeds to cope with seed screening in different scenes.

[0041] The screening machine is a vertical structure, mainly using gravity to screen seeds, and the blades of the screening machine play an auxiliary role to drive the seeds to rotate at low speed. The device mainly uses gravity, compared with the traditional vibrating screening machine which mainly relies on friction and vibration, so the service life of such machine is shorter. Therefore, the device greatly improves the service life of the device under the premise of saving energy.

[0042] The screen plates in the screening machine are uniformly distributed on the screen plates with the same size of the aperture of the screen plates in the same layer; the apertures of the screen plates in different layers are gradually reduced from top to bottom. The device screens out the seeds with large diameter first, and then screens out the seeds with gradually reduced diameter, so as to realize the screening of the same seeds with different specifications. Therefore, the screening machine can realize one machine with multiple uses by replacing the screen plates, and screen different types of seeds.

[0043] It should be noted that the above embodiments can be combined with one or more than two according to actual needs, and a set of combined technical features is used for multiple examples. Here, the description will not be expanded one by one.

[0044] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, but not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0045] The above description is a detailed description and example of the preferred embodiment of the present application, but these descriptions are not intended to limit the scope of the present application. Any equivalent changes or modifications made under the technical guidance of the present application should be within the scope of the patent protection of the present application.

Claims

1. A centrifugal and screening integrated seed sizer, characterized in that: The application relates to a centrifugal and screening mechanism, which comprises a screen cylinder, a shell, a spiral shaft and a centrifugal motor, the spiral shaft is rotatably arranged in the shell, the front end of the spiral shaft is transmissionally connected with the centrifugal motor, the middle part of the shell is arranged with the screen cylinder to separate into a seed cavity and an impurity cavity, the front end of the shell is provided with a centrifugal feeding port, the end of the shell is provided with a seed discharging port communicated with the seed cavity, the middle part of the shell is provided with an impurity discharging port communicated with the impurity cavity; the screening mechanism comprises a screening box, a vane shaft, a screening plate and a screening motor, the top of the screening box is provided with a screening feeding port, the screening box is arranged below the shell, and the screening feeding port is below the seed discharging port, at least one screening plate is arranged in the screening box from top to bottom to separate into at least two screening rooms, the bottom side of each screening room is provided with a screening discharging port, the vane shaft is rotatably arranged in the screening box, the vane shaft is arranged in extension along the up and down directions, the vane shaft is provided with a vane part corresponding to the bottom position of each screening room, and the bottom end of the vane shaft is transmissionally connected with the screening motor.

2. The centrifugal-sieving-in-one machine of claim 1, wherein: The screen cylinder is in a cylindrical structure with both ends being open, the end of the screen cylinder is connected to the inner wall of the shell in a radial outward protruding mode, the front end of the shell is contracted in a radial mode to form a contraction wall, and the front end of the screen cylinder is connected to the surface of the contraction wall; the spiral shaft is matched with the front end of the shell and the inner wall of the screen cylinder to form a spiral conveying structure; the end of the screen cylinder and the shell is inclined downward by 5-30 degrees.

3. The centrifugal-sieving-in-one machine of claim 1, wherein: The screen cylinder is between the shell and the spiral shaft, the outer periphery of the screen and the inner wall of the shell form the impurity cavity, and the spiral shaft, the inner periphery of the screen and the inner wall of the shell form the seed cavity.

4. The centrifugal-sieving-in-one machine of claim 1, wherein: The impurity discharging port is directly below the screen, and the impurity discharging port extends outward and protrudes out of the screening mechanism.

5. The centrifugal-sieving-in-one machine of claim 1, wherein: The transmission shaft of the centrifugal motor is connected with a driving gear, the front end of the spiral shaft is connected with a driven gear, and the driving gear is meshingly connected with the driven gear.

6. The centrifugal-sieving-in-one machine of claim 1, wherein: The hole diameter of the screening hole of the at least one screening plate gradually decreases from top to bottom.

7. The centrifugal-sieving-in-one machine of claim 1, wherein: The screening discharging ports of each screening room are staggered with the impurity discharging port, and the adjacent two screening discharging ports are staggered by 30-90 degrees.

8. The centrifugal-sieving-in-one machine of claim 1, wherein: The transmission shaft of the screening motor is connected with a main crank, the bottom end of the vane shaft is connected with a secondary crank, and the main crank is connected with the secondary crank through a connecting rod.

9. The centrifugal-sieving-in-one machine of claim 8, wherein: The bottom of the screening box is arranged with a bottom plate to separate into an equipment cavity below the bottom plate, the bottom end of the vane shaft is rotatably connected to the bottom surface of the bottom plate through a bearing and a shaft sleeve, the screening motor is arranged in the equipment cavity, and the transmission shaft of the screening motor is arranged in vertical extension.

10. The centrifugal-sieving-in-one machine of claim 1, wherein: The middle part of the shell is installed on the top outer wall of the screening box through a U-shaped frame, and the end of the shell is installed on the top outer wall of the screening box through a triangular frame.

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