Flow controllable seed lifting apparatus

Abstract

This invention discloses a flow-controllable seed lifting device applied in the field of seed lifting equipment. By adding a floating bottom plate assembly to the bottom of the device, the seed level at the bottom changes with the position of the hopper. Compared with the fixed seed level of the prior art, this solution significantly reduces the resistance of seeds to multiple hoppers during the conveyor belt transport process without changing the amount of seeds scooped up by the hopper. At the same time, it effectively reduces the load pressure on bearings, transmission rollers, etc., thereby effectively ensuring the lifting efficiency of the equipment and reducing the damage rate of the equipment. In addition, the variable design of the eccentric rotating rod makes the maximum floating range of the material level plate variable, which can adapt to the transfer and lifting of seeds with different resistance, thereby effectively improving the applicability of this device.

Description

Technical Field

[0001] This invention relates to the field of seed lifting equipment, and in particular to a flow-controllable seed lifting device. Background Technology

[0002] Bucket elevators are one of the most widely used vertical conveying equipment in the field of agricultural material conveying. They are mainly composed of a drive unit, traction components (belt or chain), buckets, and a casing. The buckets are fixed to the outside of the traction components. When the traction components pass the bottom of the casing, the buckets scoop up the material accumulated at the bottom. The buckets filled with material rise to the top with the traction components, and the material is discharged from the outlet, thus realizing the vertical lifting of the material.

[0003] Existing bucket elevators suffer from a long-standing technical problem: as the equipment continues to operate, the material level at the bottom of the casing gradually rises, significantly increasing the running resistance of the buckets when scooping material from the bottom. Chinese patent CN221252667U discloses an anti-accumulation mechanism for bucket elevators. This mechanism has a motor installed on one side of the feed box, which drives an eccentric wheel to rotate, thereby controlling the intermittent entry of material into the elevator, preventing leakage and accumulation that could affect the elevator's conveying efficiency. This solution indirectly alleviates the bottom accumulation problem by controlling the feed rate, but it does not fundamentally change the contact method between the buckets and the accumulated material. Furthermore, Chinese patent CN223149425U discloses a floating base for a self-cleaning elevator. This floating base includes a base plate, a triangular box, and a connecting rod. The connecting rod is fixedly connected to a tensioning component on the elevator. When the tensioning component moves, it can change the position of the floating base, offering advantages such as good sealing, low breakage rate, and minimal material accumulation. However, the displacement of the floating base is limited by the range of motion of the tensioning component, and there is a lack of coordinated control between its position change and the timing of the hopper scooping, making it impossible to achieve precise control of the hopper intervening precisely in a specific scooping stage and disengaging in a timely manner in a non-scooping stage.

[0004] In summary, there is still a lack of existing technology for lifting equipment that can significantly reduce the overall operating resistance of the hopper during the cyclic transfer process without changing the amount of material scooped at one time, while also reducing the load pressure on key components such as bearings and drive rollers. Summary of the Invention

[0005] The core of this invention lies in adding a floating bottom plate assembly to the bottom of the equipment, so that the seed level at the bottom changes with the position of the hopper, thereby significantly reducing the seed resistance on the hopper and effectively reducing the load pressure on bearings, transmission rollers, etc., thus effectively ensuring the lifting efficiency of the equipment for seeds and reducing the damage rate of the equipment.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A flow-controllable seed lifting device includes a device shell, a top shell fixedly connected to the top of the device shell, a feed hopper fixedly installed at the bottom outer end of one side of the device shell, and a discharge port fixedly connected to the bottom top end of the other side of the top shell. The feed hopper and the discharge port are connected to each other, and a discharge valve is provided at the connection between the feed hopper and the device shell. Rotating rollers are connected to the bottom of the device shell and the inside of the top shell through bearings. A transfer belt is tensioned at the outer end of the two rotating rollers. Multiple evenly distributed hoppers are fixedly connected to the outer end of the transfer belt. The hoppers with their openings facing upwards are located on the same side as the feed hopper. An electric motor is also installed at the top outer end of the device shell. A pulley assembly is connected between the output end of the electric motor and the upper rotating roller.

[0008] The bottom of the equipment casing is also equipped with a floating bottom plate assembly. The floating bottom plate assembly includes a material level adjustment plate fixedly connected to the inner wall of the bottom of the equipment casing and multiple eccentrically set rotating rods installed between the front and rear inner walls of the bottom of the equipment casing via electric rotating shafts. The multiple eccentric rotating rods are in contact with the bottom of the material level adjustment plate.

[0009] A material level sensor is installed on the inner wall near the bottom of the equipment casing, and a controller is installed on the outer end of the equipment casing. The material level sensor and the electric rotating shaft are both connected to the controller signal. An angle sensor is installed on each hopper. The angle sensor's angle data is reset to zero every time the hopper rotates 360°. When the hopper opening is facing directly downwards, the angle sensor measures 0°.

[0010] Furthermore, the material level adjustment plate includes an adaptive frame connected to the inner wall of the equipment housing and a floating plate fixedly embedded in the middle of the adaptive frame. The adaptive frame is made of elastic sealing material, and the floating plate is made of rigid material.

[0011] Furthermore, the upper and lower surfaces of the adaptive frame are covered with shims, and the two shims and the adaptive frame are fixedly connected to the inner wall of the device housing by multiple bolts.

[0012] Furthermore, the eccentric rotating rod includes two rotating shafts, an eccentric setting shaft fixedly connected between the two rotating shafts, and a protruding half-shaft rotatably connected to the outside of the eccentric shaft. A sliding rail is carved on the outer wall of the eccentric shaft, and a limit strip is also fixedly connected to the outer wall of the eccentric shaft. The protruding half-shaft is slidably connected to the sliding rail.

[0013] Furthermore, there are multiple sliding rails, only one limiting strip, and the sliding rails are notched annular rings, with the limiting strip corresponding to the notch of the sliding rail.

[0014] Furthermore, two limiting strips are provided, located at the two ends of the eccentric shaft respectively, with the ends of the limiting strips flush with the end face of the eccentric shaft. The sliding rail is located between the two limiting strips, and the limiting strips form a complete ring.

[0015] Furthermore, the raised half-shaft includes a fixed convex shaft slidably connected to the sliding rail and two movable convex shafts located on both sides of the fixed convex shaft. Guide rods are also fixedly connected to both ends of the fixed convex shaft, and the ends of the guide rods extend into the movable convex shafts and are slidably connected to the movable convex shafts.

[0016] Furthermore, when the fixed cam shaft contacts both guide rods simultaneously, the axial span of the three is less than the distance between the two limit bars. When a positive current is applied, the fixed cam shaft generates a magnetic attraction force on the moving cam shaft, and vice versa.

[0017] A flow-controllable seed booster device, the method of using which includes the following steps:

[0018] S1. First, the seeds are put into the feeding hopper. The controller controls the discharge valve to open, so that some seeds fall to the bottom of the equipment shell. The level sensor monitors the position of the seed accumulation surface at the bottom of the equipment shell. When the target position is reached, the discharge valve is closed.

[0019] S2. Control the motor to start, drive the conveyor belt through the pulley assembly to rotate the hopper at its outer end, and record the angle change of the hopper in real time through the angle sensor. When the angle data of the hopper gradually increases, it means that the hopper is gradually approaching the bottom. When its angle increases to the first threshold, control the floating bottom plate assembly to rise, so that the seed material level rises, and the hopper can fully enter the seed pile to scoop up the seeds.

[0020] S3. When the angle data of the hopper is greater than 90°, it means that the bottom has been crossed. When the angle continues to increase to the second threshold, the controller controls the floating bottom plate assembly to descend, so that the seed material level drops and the hopper is separated from the seed pile.

[0021] S4. As the conveyor belt continues to rotate, the angle of the hopper gradually changes to 180° and continues to increase after rising to the top, reaching 270°. Under the action of centrifugal force, the seeds in the hopper are thrown out and then discharged along the discharge port, thus lifting the seeds.

[0022] Furthermore, the first threshold is less than the second threshold. If the central angle corresponding to the area crossed by the bottom hopper along the transmission roller when the floating bottom plate assembly is in the rising and floating state is b, then the first threshold is 90°-b / 2 and the second threshold is 90°+b / 2.

[0023] Compared with the prior art, the advantages of this invention are:

[0024] (1) This solution adds a floating bottom plate assembly to the bottom of the equipment so that the seed level at the bottom changes with the position of the hopper. Compared with the fixed seed level of the prior art, without changing the amount of seeds scooped up by the hopper, the resistance of seeds to multiple hoppers during the conveyor belt transfer process is greatly reduced, and the load pressure on bearings, transmission rollers and other components is effectively reduced, thereby effectively ensuring the efficiency of the equipment in lifting seeds and reducing the damage rate of the equipment.

[0025] (2) The variable design of the eccentric rotating rod makes the maximum floating range of the material level changing plate variable, so as to adapt to the transfer and lifting of seeds with different resistance, thereby effectively improving the applicability of this equipment. Attached Figure Description

[0026] Figure 1 This is a perspective view of the bottom of the device housing of the present invention with a portion of the housing removed;

[0027] Figure 2 This is a perspective view of the present invention;

[0028] Figure 3 This is a partial perspective view of the bottom of the present invention;

[0029] Figure 4 This is a bottom perspective view of the floating base plate assembly of the present invention;

[0030] Figure 5 This is a bottom perspective view of the floating base plate assembly of the present invention when the middle part floats and rises.

[0031] Figure 6 A perspective view of the eccentrically mounted rotating rod of the present invention;

[0032] Figure 7 This is a top perspective view of the floating base plate assembly of the present invention when the middle part floats and rises.

[0033] Figure 8 This is a schematic diagram showing the change of the eccentric rotating rod during the process of the floating base plate assembly being lifted in the middle.

[0034] Figure 9 This is a comparative diagram of the present invention and the prior art;

[0035] Figure 10 This is a schematic diagram of the process by which the seed material level is controlled to float up and down by the bottom plate floating component when the hopper passes the bottom of the present invention.

[0036] Figure 11 A perspective view of the eccentrically set rotating rod of the present invention when adapting to low-resistance seeds;

[0037] Figure 12 A perspective view of the eccentrically set rotating rod of the present invention when adapting to high-resistance seeds;

[0038] Figure 13 This is a front view of the eccentrically set rotating rod of the present invention adapted to a low-resistance seed.

[0039] Explanation of the labels in the diagram:

[0040] 11 Feed hopper, 12 Discharge port, 21 Equipment shell, 22 Top shell, 23 Transfer belt, 3 Motor, 4 Hopper, 5 Material level adjustment plate, 51 Floating plate, 52 Adaptive frame, 61 Eccentric shaft, 62 Raised half shaft, 63 Rotating shaft, 601 Sliding rail, 602 Limiting strip, 621 Moving convex shaft, 622 Fixed convex shaft, 623 Guide rod. Detailed Implementation

[0041] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0042] First implementation method:

[0043] like Figures 1-3 A flow-controllable seed lifting device includes a housing 21, a top shell 22 fixedly connected to the top of the housing 21, a feed hopper 11 fixedly installed at the bottom outer end of one side of the housing 21, and a discharge port 12 fixedly connected to the bottom top of the other side of the top shell 22. The feed hopper 11 and the discharge port 12 are connected, and a discharge valve is provided at the connection between the feed hopper 11 and the housing 21. Rotating rollers are connected to the bottom of the housing 21 and the inside of the top shell 22 through bearings. A transfer belt 23 is tensioned at the outer end of the two rotating rollers. Multiple evenly distributed hoppers 4 are fixedly connected to the outer end of the transfer belt 23. The hoppers 4 with their openings facing upwards are located on the same side as the feed hopper 11. A motor 3 is also installed at the top outer end of the housing 21. A pulley assembly is connected between the output end of the motor 3 and the upper rotating rollers. In use, seeds enter the bottom of the housing 21 through the feed hopper 11, are scooped up by the multiple rotating hoppers 4 in sequence, and transferred to the top, and then discharged through the discharge port 12, thus lifting the seeds.

[0044] like Figure 3 and Figure 4 The bottom of the equipment housing 21 is also equipped with a floating bottom plate assembly. This assembly includes a material level adjustment plate 5 fixedly connected to the inner wall of the bottom of the equipment housing 21, and multiple eccentrically mounted rotating rods installed between the front and rear inner walls of the bottom of the equipment housing 21 via electric rotating shafts. All the eccentric rotating rods are in contact with the bottom of the material level adjustment plate 5. By controlling the rotation of the eccentric rotating rods, the vertical position of the material level adjustment plate 5 can be controlled, achieving floating. This allows for the regulation of the vertical movement of the seed level when the hopper 4 approaches the bottom of the equipment housing 21, thereby ensuring that the hopper 4 contacts the seed pile and scoops up the seeds within the smallest possible area and for the shortest possible time. Figure 9Compared with the fixed seed level of the existing technology, without changing the amount of seeds scooped up by the hopper 4, the resistance of the seeds to the multiple hoppers 4 during the transfer process of the conveyor belt 23 is greatly reduced. At the same time, the load pressure on the bearings, transmission rollers and other components is effectively reduced, thereby effectively ensuring the efficiency of the equipment in lifting seeds and reducing the damage rate of the equipment.

[0045] A material level sensor is installed on the inner wall of the equipment casing 21 near the bottom. The material level sensor can monitor the material level changes at the bottom of the equipment casing 21 in real time, so that the controller can control the opening of the discharge valve in time. This ensures that the hopper 4 can continuously and stably scoop up enough seeds, while reducing the occurrence of excessive resistance during transfer due to excessive seed accumulation at the bottom. A controller is also installed at the outer end of the equipment casing 21. The material level sensor and the electric rotating shaft are all connected to the controller signal. An angle sensor is installed on each hopper 4. The angle sensor resets to zero every time the hopper 4 rotates 360°. When the opening of the hopper 4 is facing directly downward, the angle sensor measures 0°. The angle sensor can monitor the position of the hopper 4. Since the contact area between the two rotating rollers and the conveyor belt 23 is only 180°, the hopper 4 will only have a significant data change at the rotating rollers. This allows for position monitoring and timely control of the floating bottom plate assembly to float in time, achieving the effect of the hopper 4 contacting the seeds in a small area and for a short time, but stably scooping up enough seeds.

[0046] like Figure 4 The material level adjustment plate 5 includes an adaptive frame 52 connected to the inner wall of the equipment housing 21 and a floating plate 51 fixedly embedded in the middle of the adaptive frame 52. The adaptive frame 52 is made of elastic sealing material, and the floating plate 51 is made of rigid material. The upper and lower surfaces of the edge of the adaptive frame 52 are covered with linings. The two linings and the adaptive frame 52 are fixedly connected to the inner wall of the equipment housing 21 by multiple bolts. The linings can strengthen the connection between the material level adjustment plate 5 and the equipment housing 21. At the same time, when the material level adjustment plate 5 floats up and down, the adaptive frame 52 is not easily damaged by pulling up and down.

[0047] like Figure 6 The eccentric rotating rod includes two rotating shafts 63, an eccentric setting shaft 61 fixedly connected between the two rotating shafts 63, and a protruding half-shaft 62 rotatably connected to the outside of the eccentric shaft 61. A sliding rail 601 is carved into the outer wall of the eccentric shaft 61, and a limiting strip 602 is also fixedly connected to the outer wall of the eccentric shaft 61. The protruding half-shaft 62 is slidably connected to the sliding rail 601. There are multiple sliding rails 601, but only one limiting strip 602. The sliding rail 601 is a notched annular shape, and the limiting strip 602 corresponds to the notch of the sliding rail 601. Figure 8 When the controller controls the eccentric rotating rod to rotate, the rotation axis is located on the rotating shaft 63, as shown. Figure 5 and Figure 7 During rotation, due to the eccentric setting of the rotating shaft 63 and the eccentric shaft 61, the upward range of the eccentric shaft 61 relative to the rotating shaft 63 gradually increases, causing the floating plate 51 to be gradually lifted. When the limiting bar 602 rotates to contact the protruding half shaft 62 at the bottom, it will drive the protruding half shaft 62 to rotate eccentrically together, thereby allowing the floating plate 51 to be lifted to a greater extent, resulting in better control of the floating level of the seed at the bottom of the equipment casing 21.

[0048] The sliding rail 601, the limiting bar 602, and the raised half-shaft 62 are optional. In specific implementation, it can be selected whether to set them according to actual needs.

[0049] It is worth noting that the length of the eccentric shaft 61 is less than the width of the floating plate 51, so that when it rotates eccentrically, it is not easily disturbed by the adaptive frame 52.

[0050] A flow-controllable seed booster device, the method of using which includes the following steps:

[0051] S1, such as Figure 2 First, the seeds are put into the feeding hopper 11. The controller controls the discharge valve to open, so that some seeds fall to the bottom of the equipment shell 21. The position of the seed accumulation surface at the bottom of the equipment shell 21 is monitored by the material level sensor. When the target position is reached, the discharge valve is closed.

[0052] S2. The control motor 3 is turned on, driving the transfer belt 23 via the pulley assembly to rotate the hopper 4 at its outer end. The angle sensor records the angle change of the hopper 4 in real time. Figure 4 When the angle data of hopper 4 gradually increases, it means that hopper 4 is gradually approaching the bottom. When its angle increases to the first threshold, the floating bottom plate assembly is controlled to rise, so that the seed material level rises and hopper 4 can fully enter the seed pile to scoop up the seeds.

[0053] S3. When the angle data of hopper 4 is greater than 90°, it means that it has crossed the bottom. When its angle continues to increase to the second threshold, the controller controls the floating bottom plate assembly to descend, so that the seed material level drops and hopper 4 is separated from the seed pile.

[0054] S4. As the conveyor belt 23 continues to rotate, the angle of the hopper 4 gradually changes to 180° and continues to increase after rising to the top, reaching 270°. Under the action of centrifugal force, the seeds in the hopper 4 are thrown out and then discharged along the discharge port 12, thus lifting the seeds.

[0055] Wherein, the first threshold is less than the second threshold. If the floating bottom plate assembly is in the rising and floating state, and the central angle corresponding to the area crossed by the bottom hopper 4 along the transmission roller is b, then the first threshold is 90°-b / 2, and the second threshold is 90°+b / 2.

[0056] like Figure 9 In the figure, 'a' represents the central angle corresponding to the area traversed by the transmission roller along the bottom hopper 4 in the prior art. Here, 'b' is significantly smaller than 'a'. That is, in this solution, by setting up a floating bottom plate assembly, during the process of circulating and transferring seeds, the hopper 4 can contact the seed pile in the smallest possible area and for the shortest possible time without changing the amount of seeds scooped up by the hopper 4. This greatly reduces the resistance experienced by multiple hoppers 4, and effectively reduces the load pressure on bearings, transmission rollers, etc., thereby effectively ensuring the efficiency of the equipment in lifting seeds and reducing the damage rate of the equipment.

[0057] In addition, the modification of the hoist in this solution is mainly concentrated at the bottom, without modifying other components. Therefore, for some equipment that has already been manufactured, no large-scale modification is required, and this floating bottom plate assembly can be easily installed, making it more widely applicable.

[0058] Second implementation method:

[0059] This embodiment differs from the first embodiment in that it changes the specific configuration of the eccentric rotating rod, while the rest remains the same as the first embodiment.

[0060] Because different seeds exert different levels of resistance on the hopper 4 when they accumulate at the bottom, the required floating range of the material level adjustment plate 5 is different. For example, low-resistance seeds such as rapeseed and millet have excellent fluidity and very little resistance, so the lifting range of the floating bottom plate can be appropriately reduced. On the other hand, high-resistance seeds such as rice and barley cause greater obstruction to the hopper when they accumulate at the bottom, so a larger floating range of the material level adjustment plate 5 is required.

[0061] Based on the above issues, such as Figures 11-12 Two limiting strips 602 are provided, located at both ends of the eccentric shaft 61, with the ends of the limiting strips 602 flush with the end faces of the eccentric shaft 61. The sliding rail 601 is located between the two limiting strips 602, and the limiting strips 602 form a complete ring. The protruding half-shaft 62 includes a fixed protruding shaft 622 slidably connected to the sliding rail 601 and two movable protruding shafts 621 located on both sides of the fixed protruding shaft 622. Guide rods 623 are also fixedly connected to both ends of the fixed protruding shaft 622. The ends of the guide rods 623 extend into the movable protruding shafts 621 and are slidably connected to the movable protruding shafts 621. When the fixed protruding shaft 622 contacts the two guide rods 623 at the same time, the axial span of the three is less than the distance between the two limiting strips 602. When a positive current is applied, the fixed protruding shaft 622 generates a magnetic attraction force on the movable protruding shaft 621, and vice versa.

[0062] When transferring low-resistance seeds, the controller can control the fixed convex shaft 622 to pass a positive current, causing it to attract the moving convex shaft 621. At this time, the distance of the raised half-shaft 62 is the shortest, and it can cross the space between the two limit bars 602. Due to gravity, the raised half-shaft 62 is always at the bottom and will not change position with the rotation of the rotating shaft 63. At this time, only the eccentric shaft 61 affects the floating of the material level changing plate 5, causing the height of the material level changing plate 5 to fluctuate slightly. When transferring high-resistance seeds, a reverse current can be passed, causing the two moving convex shafts 621 to be pushed away from the fixed convex shaft 622. At this time, when the eccentric shaft 61 rotates and the limit bar 602 approaches the raised half-shaft 62, it will carry the raised half-shaft 62 to rotate together. Due to the presence of the raised half-shaft 62, the entire radial span of the eccentric rotating rod is increased, thereby increasing the vertical range of the material level changing plate 5. Compared with the first embodiment, this embodiment is more adaptable and suitable for different seed transfer and lifting, effectively improving the applicability of this equipment.

[0063] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A flow-controllable seed lifting device, comprising a device housing (21), characterized in that: The top shell (22) is fixedly connected to the top of the equipment housing (21). A feeding bin (11) is fixedly installed at the bottom outer end of one side of the equipment housing (21). A discharge port (12) is fixedly connected to the bottom of the top of the other side of the top shell (22). The feeding bin (11) and the discharge port (12) are connected. A discharge valve is provided at the connection between the feeding bin (11) and the equipment housing (21). Rotating rollers are connected to the bottom of the equipment housing (21) and the inside of the top shell (22) through bearings. A transfer belt (23) is tensioned at the outer end of the two rotating rollers. A plurality of evenly distributed hoppers (4) are fixedly connected to the outer end of the transfer belt (23). The hoppers (4) with their openings facing upwards are located on the same side as the feeding bin (11). A motor (3) is also installed at the top outer end of the equipment housing (21). A pulley assembly is connected between the output end of the motor (3) and the rotating roller above. The bottom of the equipment housing (21) is also equipped with a floating bottom plate assembly. The floating bottom plate assembly includes a material level changing plate (5) fixedly connected to the inner wall of the bottom of the equipment housing (21) and a plurality of eccentrically set rotating rods installed between the front and rear inner walls of the bottom of the equipment housing (21) via electric rotating shafts. The plurality of eccentric rotating rods are in contact with the bottom of the material level changing plate (5). A material level sensor is installed on the inner wall of the equipment housing (21) near the bottom. A controller is also installed on the outer end of the equipment housing (21). The material level sensor and the electric rotating shaft are both connected to the controller. An angle sensor is installed on each hopper (4). The angle data of the angle sensor is cleared to zero every time the hopper (4) rotates 360°. When the opening of the hopper (4) is facing directly downward, the data measured by the angle sensor is 0°.

2. The flow-controllable seed lifting device according to claim 1, characterized in that: The material level adjustment plate (5) includes an adaptive frame (52) connected to the inner wall of the equipment housing (21) and a floating plate (51) fixedly embedded in the middle of the adaptive frame (52). The adaptive frame (52) is made of elastic sealing material, and the floating plate (51) is made of rigid material.

3. The flow-controllable seed lifting device according to claim 2, characterized in that: The upper and lower surfaces of the adaptive frame (52) are covered with linings, and the two linings and the adaptive frame (52) are fixedly connected to the inner wall of the device housing (21) by multiple bolts.

4. The flow-controllable seed lifting device according to claim 1, characterized in that: The eccentric rotating rod includes two rotating shafts (63), an eccentric setting shaft (61) fixedly connected between the two rotating shafts (63), and a protruding half shaft (62) rotatably connected to the outside of the eccentric shaft (61). The outer wall of the eccentric shaft (61) is provided with a sliding rail (601), and a limit strip (602) is also fixedly connected to the outer wall of the eccentric shaft (61). The protruding half shaft (62) is slidably connected to the sliding rail (601).

5. The flow-controllable seed lifting device according to claim 4, characterized in that: There are multiple sliding rails (601), only one limiting strip (602) is provided, and the sliding rail (601) is a notched ring, with the limiting strip (602) corresponding to the notch of the sliding rail (601).

6. The flow-controllable seed lifting device according to claim 4, characterized in that: Two limiting strips (602) are provided, and the two limiting strips (602) are located at the two ends of the eccentric shaft (61) respectively. The ends of the limiting strips (602) are flush with the end face of the eccentric shaft (61). The sliding rail (601) is located between the two limiting strips (602), and the limiting strips (602) are in a complete ring shape.

7. The flow-controllable seed lifting device according to claim 6, characterized in that: The raised half shaft (62) includes a fixed convex shaft (622) slidably connected to the sliding rail (601) and two movable convex shafts (621) located on both sides of the fixed convex shaft (622). The fixed convex shaft (622) is also fixedly connected to both ends of a guide rod (623). The end of the guide rod (623) extends into the movable convex shaft (621) and is slidably connected to the movable convex shaft (621).

8. A flow-controllable seed lifting device according to claim 7, characterized in that: When the fixed convex shaft (622) contacts the two guide rods (623) at the same time, the axial span of the three is less than the distance between the two limit bars (602). After the positive current is applied, the fixed convex shaft (622) generates a magnetic attraction force on the moving convex shaft (621), and vice versa.

9. The flow-controllable seed lifting device according to claim 1, characterized in that: Its usage includes the following steps: S1. First, put the seeds into the feeding hopper (11). The controller controls the unloading valve to open, so that some seeds fall to the bottom of the equipment shell (21). The level sensor monitors the position of the seed accumulation surface at the bottom of the equipment shell (21). When the target position is reached, the unloading valve is closed. S2. Control the motor (3) to turn on, and drive the transfer belt (23) through the pulley assembly to carry the hopper (4) at its outer end to rotate. The angle sensor records the angle change of the hopper (4) in real time. When the angle data of the hopper (4) gradually increases, it means that the hopper (4) is gradually approaching the bottom. When its angle increases to the first threshold, control the floating bottom plate assembly to rise, so that the seed material level rises, and the hopper (4) can fully enter the seed pile to scoop up the seeds. S3. When the angle data of the hopper (4) is greater than 90°, it means that it has crossed the bottom. When its angle continues to increase to the second threshold, the controller controls the floating bottom plate assembly to descend, so that the seed material level drops and the hopper (4) is separated from the seed pile. S4. As the conveyor belt (23) continues to rotate, the angle of the hopper (4) gradually becomes 180° and continues to increase after rising to the top, reaching 270°. Under the action of centrifugal force, the seeds in the hopper (4) are thrown out and then discharged along the discharge port (12), thus lifting the seeds.

10. A flow-controllable seed lifting device according to claim 9, characterized in that: The first threshold is less than the second threshold. When the floating bottom plate assembly is in the rising and floating state, the central angle corresponding to the area crossed by the bottom hopper (4) along the transmission roller is b. Then the first threshold is 90°-b / 2 and the second threshold is 90°+b / 2.

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