Agricultural product sorting device based on sinking and floating separation

Abstract

The invention relates to the technical field of floating and sinking separation, and discloses an agricultural product sorting device based on floating and sinking separation, which comprises a floating and sinking assembly, the floating and sinking assembly comprises a separation liquid barrel, the bottom end of the front surface of the separation liquid barrel is fixedly communicated with a superior product outlet pipeline, and the bottom end of the inner side of the separation liquid barrel is rotatably sleeved with a superior product screening assembly; a mounting circular plate is fixedly connected to the top of the separation liquid barrel, a feeding plate is fixedly connected to the top of the mounting circular plate, a vertical track plate is fixedly connected to one end of the feeding plate, a directional conveying assembly is fixedly connected to one end of the vertical track plate, and three inferior product track pieces are fixedly connected to the inner wall of the top of the separation liquid barrel. And one ends of the three inferior product rail pieces are fixedly connected with connecting plates, one ends of the three connecting plates fixedly communicate with the connecting plates, screening of high-quality eggs and inferior eggs is achieved, and the problems that a traditional screening method is complex in process and low in efficiency are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sink-float separation, and more particularly to an agricultural product sorting device based on sink-float separation. Background Art

[0002] Sink-float separation is a separation technology based on the density difference of substances. Its principle is to use the density difference of different components in a mixture to separate them through liquid or air flow media, so that the components with high density sink and the components with low density float. Eggs are the most common agricultural products and the most common raw materials in food production and processing. A large number of eggs are often required in food production. In large quantities of eggs, low-quality eggs are mixed with high-quality eggs, which are difficult to distinguish. In actual food processing, eggs are usually screened by methods such as appearance inspection and light transmission. Such methods require constant adjustment of the position of the eggs for detection. The process is complicated, inefficient and has poor accuracy. In addition, the shells of eggs are often covered with dirt such as chicken manure. In order not to damage the eggs, they need to be cleaned manually, which requires a huge labor cost. To this end, we propose an agricultural product sorting device based on sink-float separation to solve the above problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an agricultural product sorting device based on sinking and floating separation to solve the problems existing in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an agricultural product sorting device based on sink-float separation, comprising a sink-float assembly, wherein the sink-float assembly includes a separation liquid barrel, the bottom end of the front side of the separation liquid barrel is fixedly connected to a high-quality product outlet pipe, and the bottom end of the inner side of the separation liquid barrel is rotatably sleeved with a high-quality product screening assembly; The top of the separation liquid barrel is fixedly connected to a mounting circular plate, the top of the mounting circular plate is fixedly connected to a feed plate, one end of the feed plate is fixedly connected to a vertical track plate, one end of the vertical track plate is fixedly connected to a directional conveying assembly, three inferior track pieces are fixedly connected to the inner wall of the top of the separation liquid barrel, one end of each of the three inferior track pieces is fixedly connected to a connecting plate, and one end of the three connecting plates is fixedly connected to the annular guide rail 2; The vortex in the separation liquid barrel is combined with the inferior track plate to push the superior screening component to rotate and connect to the superior outlet pipe to sort eggs. The vertical track plate allows the eggs to fall vertically into the directional conveying component for all-round cleaning.

[0005] Furthermore, the top of the floating and sinking component is fixedly connected to a posture fixing component, and the side surface of the top of the floating and sinking component is fixedly connected to a defective product screening component.

[0006] Furthermore, the bottom of the separation liquid barrel is fixedly connected to a workbench, both ends of the top of the workbench are fixedly connected to vertical plates, the tops of the two vertical plates are fixedly connected to horizontal plates, the tops of the horizontal plates are fixedly connected to a motor, the bottom of the motor is rotatably connected to a rotating rod, and the rotating rod passes through the horizontal plate, and the bottom end of the rotating rod is fixedly connected to a stirring drum.

[0007] Furthermore, a disc is fixedly connected to the bottom of the stirring drum, and the high-quality screening component includes an annular guide rail 1, a groove is provided on the side of the annular guide rail 1, and four sailboards are fixedly connected to the inner side of the annular guide rail 1, and the annular guide rail 1 is rotatably sleeved on the bottom end of the inner side of the separation liquid barrel.

[0008] Furthermore, the rotation angle of the annular guide rail 1 on the inner side of the separation liquid barrel is 0-45°, and the annular guide rail 1 can only rotate toward the nozzle of the high-quality outlet pipe, and when the annular guide rail 1 rotates 45°, the slot corresponds to the nozzle of the high-quality outlet pipe.

[0009] Furthermore, the posture fixing component includes a feed plate, the back side of which is fixedly connected to the front side of a vertical plate, and the feed plate is inclined at an angle of 15°-25° to the horizontal plane.

[0010] Furthermore, the side of the directional conveying component is fixedly sleeved with a mounting circular plate, and the mounting circular plate is provided with a rectangular groove. The port at one end of the feed plate and the bottom of the vertical track plate are fixedly connected above the rectangular groove. Three short rods are fixedly connected to the bottom of the mounting circular plate, and the bottom ends of the three short rods are fixedly connected to the top of the separation liquid barrel.

[0011] Furthermore, the directional conveying assembly includes a central shaft, the central shaft is connected to the rotating rod through a transmission assembly, and the side surfaces of the top end and the bottom end of the central shaft are both rotatably sleeved with mounting plates.

[0012] Furthermore, both sides of the two mounting plates are fixedly connected with a restraining plate, one side of the restraining plate is provided with an arc-shaped groove, the side surface of the central axis is fixedly sleeved with a brush, and the restraining plate is between the two mounting plates.

[0013] Furthermore, the inferior product screening component includes an annular guide rail 2, and three square openings are provided on the inner side of the annular guide rail 2. The three square openings are fixedly connected with a connecting plate. One end of the inferior product rail is bent downward, and the bending angle is 15°-35°.

[0014] Technical effects and advantages of the present invention: The eggs are placed on the feed plate, and the eggs roll from the feed plate to the vertical track plate. Under the action of the vertical track plate, the eggs are upright and fall into the two constraint plates. The motor drives the rotating rod to rotate, and under the action of the transmission component, the central axis also starts to rotate. When the eggs fall between the two constraint plates, the central axis carries the brush to sweep the eggs horizontally. While the eggs fall vertically, they rotate under the action of the horizontal friction force of the brush, so that the brush cleans the egg shell in all directions, avoiding manual cleaning of the eggs and saving a lot of labor costs.

[0015] Liquid of a specific density is injected into the separation liquid barrel, and the eggs fall into the water from the restraint plate. The motor drives the rotating rod to rotate, and then drives the stirring drum to rotate. Under the action of the stirring drum, the water in the separation liquid barrel forms a vortex and is stratified in the dynamic liquid flow: high-density, high-quality eggs sink to the high-quality screening component, and low-density, low-quality eggs float up and are guided to the circular guide rail 2 by the low-quality track piece to realize continuous wet sorting. Under the action of the vortex centrifugal force, the eggs make a circular motion along the inner wall of the separation liquid barrel. Since the poor-quality eggs float on the water surface, they are separated by the rollers. When the inner wall of the separation liquid barrel moves, it is guided by the inferior track piece to the annular guide rail 2 and leaves the water surface. After the poor quality eggs leave the water surface, the total mass of the water in the separation liquid barrel decreases, and the vortex generated by the stirring drum is more intense, so that the vortex water flow pushes the sailboard to move, thereby causing the annular guide rail 1 to rotate until the slot corresponds to the high-quality outlet pipe. The water flow in the separation liquid barrel is discharged from the high-quality outlet pipe, and then the high-quality eggs are discharged with the water flow, realizing the separation of high-quality eggs from low-quality eggs, and solving the problems of complicated process and low efficiency of traditional screening methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the floating and sinking component of the present invention; Figure 3 It is a schematic diagram of the side cross-section structure of the floating and sinking component of the present invention; Figure 4 This is a schematic diagram of the structure of the superior product screening component of the present invention; Figure 5 This is a structural diagram of the posture fixing component of the present invention; Figure 6 This is a schematic structural diagram of a directional conveying assembly according to the present invention; Figure 7 This is a schematic structural diagram of the inferior product screening component of the present invention.

[0017] The figures are marked as follows: 1. Floating and sinking assembly; 101. Separation liquid barrel; 102. High-quality product outlet pipe; 103. Motor; 104. Rotating rod; 105. Stirring drum; 106. High-quality product screening assembly; 1061. Annular guide rail 1; 1062. Sailboard; 2. Posture fixing assembly; 201. Feed plate; 202. Vertical track plate; 203. Directional conveying assembly; 2031. Center axis; 2032. Brush; 2033. Constraint plate; 204. Mounting circular plate; 3. Low-quality product screening assembly; 301. Annular guide rail 2; 302. Connecting plate; 303. Low-quality product track piece. DETAILED DESCRIPTION

[0018] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The agricultural product sorting device based on sinking and floating separation involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1 The present invention provides an agricultural product sorting device based on sinking and floating separation, including a sinking and floating component 1, the top of which is fixedly connected to a posture fixing component 2, and the side of the top of which is fixedly connected to a defective product screening component 3.

[0020] What needs to be specifically explained in this embodiment is that the floating and sinking component 1 and the posture fixing component 2 avoid manual cleaning of eggs, saving a lot of labor costs. The floating and sinking component 1 and the inferior product screening component 3 solve the problems of complicated process and low efficiency of traditional screening methods. The specific structure and working principle of the above components will be described in detail later.

[0021] Reference Figure 2 The floating and sinking component 1 includes a separation liquid barrel 101, the bottom end of the front side of the separation liquid barrel 101 is fixedly connected to a high-quality product outlet pipe 102, the bottom of the separation liquid barrel 101 is fixedly connected to a workbench, both ends of the top of the workbench are fixedly connected to vertical plates, the tops of the two vertical plates are fixedly connected to horizontal plates, the tops of the horizontal plates are fixedly connected to a motor 103, the bottom of the motor 103 is rotatably connected to a rotating rod 104, and the rotating rod 104 passes through the horizontal plate, and the bottom end of the rotating rod 104 is fixedly connected to a stirring drum 105.

[0022] What needs to be specifically explained in this embodiment is that the separation liquid barrel 101 is filled with salt water with a density of 1.05-1.10g / cm³, which is adapted to the density difference of eggs. A drainage trough is provided at the bottom of the high-quality outlet pipe 102. When the water in the separation liquid barrel 101 is discharged from the high-quality outlet pipe 102, the drainage trough discharges part of the water, thereby reducing the water pressure circulating in the high-quality outlet pipe 102, thereby avoiding excessive water pressure and damage to the eggs.

[0023] Reference Figure 3 The bottom of the stirring drum 105 is fixedly connected with a disc, and the bottom end of the inner side of the separation liquid barrel 101 is rotatably sleeved with a high-quality screening component 106.

[0024] Reference Figure 4 The high-quality screening component 106 includes an annular guide rail 1061, a notch is provided on the side of the annular guide rail 1061, four sailboards 1062 are fixedly connected to the inner side of the annular guide rail 1061, and the annular guide rail 1061 is rotatably sleeved on the bottom end of the inner side of the separation liquid barrel 101. The rotation angle of the annular guide rail 1061 on the inner side of the separation liquid barrel 101 is 0-45°, and the annular guide rail 1061 can only rotate toward the mouth of the high-quality outlet pipe 102.

[0025] What needs to be specifically explained in this embodiment is that when the annular guide rail 1061 rotates 45°, the slot corresponds to the mouth of the high-quality product outlet pipe 102, and the four sails are evenly distributed at 90° and tilted at an angle of 15°, forming an axial-radial composite flow field, which promotes the movement of light impurities to the barrel wall.

[0026] Reference Figure 5 The posture fixing component 2 includes a feed plate 201, the back of which is fixedly connected to the front of a vertical plate, and the feed plate 201 is inclined at an angle of 15°-25° to the horizontal plane. One end of the feed plate 201 is fixedly connected to a vertical track plate 202, and one end of the vertical track plate 202 is fixedly connected to a directional conveying component 203. The side of the directional conveying component 203 is fixedly sleeved with a mounting circular plate 204, and the mounting circular plate 204 is provided with a rectangular groove. The port at one end of the feed plate 201 and the bottom of the vertical track plate 202 are fixedly connected above the rectangular groove, and three short rods are fixedly connected to the bottom of the mounting circular plate 204, and the bottom ends of the three short rods are fixedly connected to the top of the separation liquid barrel 101.

[0027] In this embodiment, it is important to note that the feed plate 201 is inclined at an angle of 15°-25°, preferably 25°, to the horizontal plane for optimal egg rolling efficiency. The ends of the vertical track plate 202 are angled upward and perpendicular to the horizontal plane. When the egg passes through the vertical track plate 202, it enters the water with its air chamber facing upward, preventing bubbles from adhering and affecting separation. The distance between the outlet of the vertical track plate 202 and the liquid surface is controlled at 50-80 mm, and the egg entry angle is 80°-85° (relative to the horizontal plane). This angle aligns the egg's axis with the direction of the water flow, reducing bubble adhesion (measured residual bubble area is less than 2%).

[0028] Reference Figure 6 The directional conveying assembly 203 includes a central shaft 2031, which is connected to the rotating rod 104 through a transmission assembly. The side surfaces of the top and bottom ends of the central shaft 2031 are rotatably sleeved with mounting plates, and both sides of the two mounting plates are fixedly connected with a constraint plate 2033. One side of the constraint plate 2033 is provided with an arc-shaped groove, and a brush 2032 is fixedly sleeved on the side surface of the central shaft 2031. The constraint plate 2033 is between the two mounting plates. Brush 2032 uses nylon 612 filaments with a diameter of 0.15mm and a tensile strength of ≥800MPa. They are arranged in a spiral pattern (pitch 8mm) at a density of 1200 filaments / cm², ensuring full coverage of the egg surface (the curvature radius is adapted to eggs 40-45mm in diameter). The contact pressure between the brush and the egg is dynamically adjusted (range 5-15N) by a preload spring mechanism. A pressure sensor provides real-time feedback, ensuring a controllable cleaning force of 0.3-0.5MPa, effectively removing dirt without damaging the eggshell membrane. The eggs are placed on the feed plate 201 and rolled onto the vertical track plate 202. Under the action of the vertical track plate 202, the eggs stand upright and fall into the two restraining plates 2033. The motor 103 drives the rotating rod 104 to rotate. Under the action of the transmission assembly, the central shaft 2031 also starts to rotate. When the eggs fall between the two central shafts 2031, the central shaft 2031 carries the brush 2032 to sweep the eggs horizontally. As the eggs fall vertically, they rotate under the action of the horizontal friction force of the brush 2032, so that the brush 2032 cleans the egg shells in all directions, avoiding manual cleaning of the eggs and saving a lot of labor costs. It should be specifically explained in this embodiment that the transmission component is a chain, which is a prior art and thus will not be described in detail.

[0029] Reference Figure 7The inferior product screening component 3 includes an annular guide rail 2 301, and three square openings are provided on the inner side of the annular guide rail 2 301. The three square openings are fixedly connected to a connecting plate 302, and one end of the three connecting plates 302 is fixedly connected to an inferior product track piece 303. The side surfaces of the three inferior product track pieces 303 are fixedly sleeved on the inner wall of the top of the separation liquid barrel 101, and one end of the inferior product track piece 303 is bent downward, and the bending angle is 15°-35°.

[0030] It should be specifically explained that in this embodiment, one end of the inferior rail piece 303 is bent downward by 25°; In the separation liquid barrel 101, there is a liquid with a specific density (such as salt water). The eggs fall into the water from the restraining plate 2033. The motor 103 drives the rotating rod 104 to rotate, and then drives the stirring drum 105 to rotate. Under the action of the stirring drum 105, the water in the separation liquid barrel 101 forms a vortex, and the eggs are stratified in the dynamic liquid flow: high-density and high-quality eggs sink to the high-quality screening component 106, and low-density and low-quality eggs float up and are guided to the annular guide rail 2 301 by the low-quality track piece 303 to realize continuous wet sorting. Under the action of the vortex centrifugal force, the eggs make a circular motion along the inner wall of the separation liquid barrel 101. Since the poor-quality eggs float on the When the eggs are separated from the water surface, they are guided by the inferior track piece 303 to the annular guide rail 2 301 as they move along the inner wall of the separation liquid barrel 101 and leave the water surface. After the poor quality eggs leave the water surface, the total mass of the water in the separation liquid barrel 101 decreases, and the vortex generated by the stirring drum 105 is stronger, so that the vortex water flow pushes the sailboard 1062 to move, thereby causing the annular guide rail 1061 to rotate until the slot corresponds to the high-quality outlet pipe 102, and the water flow in the separation liquid barrel 101 is discharged from the high-quality outlet pipe, and then the high-quality eggs are discharged with the water flow, thereby realizing the separation of high-quality eggs and low-quality eggs, solving the problems of complicated process and low efficiency of traditional screening methods.

[0031] The working principle of the present invention is as follows: eggs are placed on the feed plate 201, and the eggs roll from the feed plate 201 to the vertical track plate 202. Under the action of the vertical track plate 202, the eggs stand upright and fall into the two restraining plates 2033. The motor 103 drives the rotating rod 104 to rotate. Under the action of the transmission assembly, the central shaft 2031 also starts to rotate. When the eggs fall between the two central shafts 2031, the central shaft 2031 carries the brush 2032 to sweep the eggs horizontally. While the eggs fall vertically, they rotate under the action of the lateral friction force of the brush 2032, so that the brush 2032 cleans the egg shells in all directions, avoiding manual cleaning of the eggs and saving a lot of labor costs. In the liquid of specific density in the separation liquid barrel 101, the eggs fall into the water from the restraining plate 2033, and the motor 103 drives the rotating rod 104 to rotate, thereby driving the stirring drum 105 to rotate. Under the action of the stirring drum 105, the water in the separation liquid barrel 101 forms a vortex, and the eggs are stratified in the dynamic liquid flow: high-density and high-quality eggs sink to the high-quality screening component 106, and low-density and low-quality eggs float up and are guided to the annular guide rail 2 301 by the low-quality track piece 303, realizing continuous wet sorting. Under the action of the vortex centrifugal force, the eggs make a circular motion along the inner wall of the separation liquid barrel 101. Due to the poor quality eggs floating on the water surface, the eggs are separated by the vortex centrifugal force. When moving along the inner wall of the separation liquid barrel 101, the eggs are guided by the inferior track piece 303 to the annular guide rail 2 301 and leave the water surface. After the poor quality eggs leave the water surface, the total mass of the water in the separation liquid barrel 101 decreases, and the vortex generated by the stirring drum 105 is stronger, so that the vortex water flow pushes the sailboard 1062 to move, thereby causing the annular guide rail 1061 to rotate until the slot corresponds to the high-quality outlet pipe 102. The water flow in the separation liquid barrel 101 is discharged from the high-quality outlet pipe, and then the high-quality eggs are discharged along with the water flow, realizing the separation of high-quality eggs from low-quality eggs, solving the problems of complicated process and low efficiency of traditional screening methods.

[0032] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An agricultural product sorting device based on sink-float separation, comprising a sink-float component (1), characterized in that: The floating and sinking assembly (1) comprises a separation liquid barrel (101), the bottom end of the front side of the separation liquid barrel (101) is fixedly connected to a high-quality product outlet pipe (102), and the bottom end of the inner side of the separation liquid barrel (101) is rotatably sleeved with a high-quality product screening assembly (106); The top of the separation liquid barrel (101) is fixedly connected to a mounting circular plate (204), the top of the mounting circular plate (204) is fixedly connected to a feed plate (201), one end of the feed plate (201) is fixedly connected to a vertical track plate (202), one end of the vertical track plate (202) is fixedly connected to a directional conveying assembly (203), three inferior track pieces (303) are fixedly connected to the inner wall of the top of the separation liquid barrel (101), one end of each of the three inferior track pieces (303) is fixedly connected to a connecting plate (302), and one end of the three connecting plates (302) is fixedly connected to the annular guide rail 2 (301); The vortex in the separation liquid barrel (101) is combined with the inferior track plate (303) to push the superior screening component (106) to rotate and connect to the superior outlet pipe (102) to sort the eggs. The vertical track plate (202) allows the eggs to fall vertically into the directional conveying component (203) for all-round cleaning.

2. The agricultural product sorting device based on sink-float separation according to claim 1, characterized in that: The top of the floating and sinking component (1) is fixedly connected to a posture fixing component (2), and the side surface of the top of the floating and sinking component (1) is fixedly connected to a defective product screening component (3).

3. The agricultural product sorting device based on sink-float separation according to claim 2, characterized in that: The bottom of the separation liquid barrel (101) is fixedly connected to a workbench, both ends of the top of the workbench are fixedly connected to vertical plates, the tops of the two vertical plates are fixedly connected to horizontal plates, the tops of the horizontal plates are fixedly connected to a motor (103), the bottom of the motor (103) is rotatably connected to a rotating rod (104), and the rotating rod (104) passes through the horizontal plates, and the bottom end of the rotating rod (104) is fixedly connected to a stirring drum (105).

4. The agricultural product sorting device based on sink-float separation according to claim 3, characterized in that: The bottom of the stirring drum (105) is fixedly connected to a disc, and the high-quality screening component (106) includes an annular guide rail (1061). The side of the annular guide rail (1061) is provided with a slot, and the inner side of the annular guide rail (1061) is fixedly connected to four sailboards (1062). The annular guide rail (1061) is rotatably sleeved on the bottom end of the inner side of the separation liquid barrel (101).

5. The agricultural product sorting device based on sink-float separation according to claim 4, characterized in that: The rotation angle of the annular guide rail 1 (1061) inside the separation liquid barrel (101) is 0-45 degrees, and the annular guide rail 1 (1061) can only rotate toward the nozzle of the high-quality product outlet pipe (102), and when the annular guide rail 1 (1061) rotates 45 degrees, the notch corresponds to the nozzle of the high-quality product outlet pipe (102).

6. The agricultural product sorting device based on sink-float separation according to claim 5, characterized in that: The posture fixing component (2) comprises a feed plate (201), the back surface of the feed plate (201) being fixedly connected to the front surface of a vertical plate, and the feed plate (201) is inclined at an angle of 15°-25° with the horizontal plane.

7. The agricultural product sorting device based on sink-float separation according to claim 6, characterized in that: The side of the directional conveying component (203) is fixedly sleeved with a mounting circular plate (204), and the mounting circular plate (204) is provided with a rectangular groove. The port at one end of the feed plate (201) and the bottom of the vertical track plate (202) are fixedly connected above the rectangular groove. The bottom of the mounting circular plate (204) is fixedly connected with three short rods, and the bottom ends of the three short rods are fixedly connected to the top of the separation liquid barrel (101).

8. The agricultural product sorting device based on sink-float separation according to claim 7, characterized in that: The directional conveying assembly (203) comprises a central shaft (2031), the central shaft (2031) is connected to the rotating rod (104) via a transmission assembly, and the side surfaces of the top end and the bottom end of the central shaft (2031) are both rotatably sleeved with mounting plates.

9. The agricultural product sorting device based on sink-float separation according to claim 8, characterized in that: A constraint plate (2033) is fixedly connected to both sides of the two mounting plates, one side of the constraint plate (2033) is provided with an arc-shaped groove, a brush (2032) is fixedly sleeved on the side of the central shaft (2031), and the constraint plate (2033) is between the two mounting plates.

10. The agricultural product sorting device based on sink-float separation according to claim 9, characterized in that: The inferior product screening assembly (3) comprises an annular guide rail 2 (301), wherein the inner side of the annular guide rail 2 (301) is provided with three square openings, and the three square openings are all fixedly connected to a connecting plate (302), and one end of the inferior product rail piece (303) is bent downward, and the bending angle is 15°-35°.

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