A multi-stage screening device for grain detection and its usage method

Abstract

This invention discloses a multi-stage screening device for grain detection and its usage method, belonging to the field of grain screening technology. It includes a screening component and a driving component. The screening component comprises multiple screening mechanisms arranged sequentially along a vertical direction, each including a screening mesh. The mesh diameter of the multiple screening meshes gradually decreases along the vertically downward direction. The driving component includes a first driving mechanism and a second driving mechanism. In this invention, by dividing the driving component into a first driving mechanism and a second driving mechanism, a single geared motor can drive multiple screening mechanisms to perform multi-stage screening of grains and control the tilting and unloading of the screening mechanisms. This achieves full and thorough utilization of the kinetic energy generated by the geared motor. Furthermore, since the grains in each screening mechanism can be screened for an extended period without unloading, complete and thorough screening of the grains is achieved.

Description

Technical Field

[0001] This invention belongs to the field of grain screening technology, and in particular relates to a multi-stage screening device for grain detection and its usage method. Background Technology

[0002] Grains encompass a broad range, including rice, wheat, millet, soybeans, and other miscellaneous grains. Grains, including rice, wheat, millet, and soybeans, are primarily plant seeds and fruits. They are a traditional staple food for many Asian peoples.

[0003] From the perspective of human metabolism, using grains as the main source of energy is very suitable. The starch and sugar in grains that provide energy have simple structures and can be quickly oxidized and broken down by the body, providing a large amount of energy over a period of time. The final products of oxidation and decomposition, carbon dioxide and water, can be easily and directly excreted from the body.

[0004] Grain testing encompasses many aspects, such as detecting moisture content in rice, a chemical component of rice. The moisture content of rice significantly impacts rice processing. High moisture content reduces rice flowability, making cleaning and bran separation difficult, reducing dehulling efficiency, decreasing processing strength, increasing broken rice rate, and leading to higher energy consumption and production costs. Conversely, while low moisture content facilitates dehulling, the tight bond between the bran and endosperm makes grinding difficult, also hindering processing.

[0005] Before grain testing, a multi-stage screener is usually used to remove impurities and other substances that affect the accuracy of the test. Current multi-stage screeners typically use a rolling structure, that is, using a tilted screening channel, the grain to be screened is put into the highest point of the channel, and the rolling of the grain achieves the purpose of multi-stage screening. The drawback of this method is that since the grain can only flow through the screening channel once, it is difficult to completely clean the grain in one screening, and it is impossible to obtain grain that meets the actual screening requirements. In order to get the grain to flow through the screening channel again, the screened grain must be collected and put back into the highest point of the screening channel, which wastes manpower and resources. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-stage screening device for grain detection and its usage method in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A multi-stage filter for grain detection and its method of use, comprising a screening component and a driving component, wherein the screening component includes a plurality of screening mechanisms arranged sequentially in a vertical direction, each of the screening mechanisms including a screening mesh, and the mesh diameter of the plurality of screening meshes gradually decreases in a vertically downward direction;

[0009] The driving assembly includes a first driving mechanism and a second driving mechanism, wherein the first driving mechanism is used to drive the screening mechanism to perform lateral reciprocating motion, and the second driving mechanism is used to drive the screening mesh to tilt.

[0010] As a further description of the above technical solution: by dividing the drive assembly into two parts, a first drive mechanism and a second drive mechanism, a single geared motor can drive multiple screening mechanisms to perform multi-stage screening of grains, and can also control the tilting and unloading of the screening mechanisms, thus realizing the full and thorough utilization of the kinetic energy generated by the geared motor. At the same time, since the grains in each screening mechanism can be screened for a long time without unloading, the grains can be completely and thoroughly screened.

[0011] The screening mechanism also includes a screening frame fixed to the top surface of the screening mesh. A discharge component is provided at one end of the screening frame. The discharge component includes a discharge port on one end face of the screening frame, a baffle plate provided at one end of the screening frame for opening and closing the discharge port, and a discharge hopper. One end of the baffle plate is hinged to the screening frame by a hinge, and the other end is fastened to the screening frame by a latch. The discharge hopper is used to receive the material discharged through the discharge port.

[0012] As a further description of the above technical solution: the screening mesh and the screening frame can form a square box-shaped structure with the bottom of the screening mesh open at the top. In use, the grain is poured from the top of the screening frame of the first screening mechanism onto the screening mesh connected to the screening frame. In this way, during the shaking of the screening mechanism, the grain on the screening mesh will be confined by the screening frame, thereby preventing the grain from falling outside the screening frame. After the second drive mechanism drives the screening mechanism to tilt, the hinge can be opened manually, and then the baffle can be opened. Then, the screening grain can be discharged by the cooperation of the discharge port and the discharge hopper.

[0013] The screening assembly further includes a support mechanism for supporting the screening mechanism. The support mechanism includes two first guide rods, a first guide sleeve fixed on the screening frame and slidably sleeved on the first guide rods, two compression springs, a second baffle hinged to one end of the two first guide rods, and a first baffle disposed at the other end of the two first guide rods. The upper surface of the first baffle is flush with the upper surface of the second baffle, and the lower surface of the first baffle is flush with the lower surface of the second baffle. The compression springs are connected between the first guide sleeves and the second baffles. The second baffle has a slot for the discharge hopper to pass through.

[0014] As a further description of the above technical solution: After the first guide rod and the second baffle are hinged, the first guide rod can rotate in a vertical plane with the hinge point of the first guide rod and the second baffle as the center, so as to cooperate with the second drive mechanism to move the end of the screening mechanism near the first baffle upward, that is, to achieve the tilting of the screening mechanism; the upper surface of the first baffle is flush with the upper surface of the second baffle, and the lower surface of the first baffle is flush with the lower surface of the second baffle. In this way, after multiple screening mechanisms are arranged together from bottom to top, multiple screening mechanisms can maintain a parallel state. The compression spring can push the screening frame so that the rotating wheel described below and the side of the drive blade always maintain rolling contact.

[0015] The first baffle has a strip-shaped vertical hole at the position corresponding to the first guide rod. A first slider that can slide vertically is slidably connected inside the strip-shaped vertical hole. A second guide sleeve is rotatably installed on the first slider through a rotating rod. The second guide sleeve is slidably sleeved on the first guide rod.

[0016] As a further description of the above technical solution: by setting a second guide sleeve that can slide vertically along the strip-shaped vertical hole, and sliding the second guide sleeve onto the first guide rod, the first baffle can always be kept straight up and down during the tilting process of the screening mechanism. Conversely, the liftable and sliding second guide sleeve provides a basis for the tilting of the screening mechanism.

[0017] The screening component is supported by a bracket assembly, which includes a horizontally arranged base plate and four vertically arranged second guide rods fixed at the four corners of the base plate. Each second guide rod is fixedly fitted with a fixing sleeve. Two third guide sleeves are fixedly fixed on the first baffle and the second baffle, and the third guide sleeves are slidably fitted onto the second guide rods.

[0018] As a further description of the above technical solution: the cooperation between the third guide sleeve and the second guide rod not only provides a basis for the tilting of the screening mechanism, but also facilitates the quick installation and disassembly of the screening mechanism by the staff.

[0019] The first driving mechanism includes a reduction motor mounted on the bottom support plate, a rotating shaft arranged vertically and fixed to the output shaft of the reduction motor, an active driving part arranged on the rotating shaft and equal in number to the screening mechanism, and a driven driving part arranged at the other end of the screening frame and cooperating with the active driving part; the driven driving part includes a vertical plate fixed to the other end of the screening frame and a rotating wheel rotatably mounted on the end of the vertical plate away from the screening frame.

[0020] The active drive unit includes a drive blade, a circular hole in the drive blade for the rotating shaft to pass through, and a bolt for mounting the drive blade to the rotating shaft. A receiving blind hole is provided on the side of the drive blade. A through hole communicating with the circular hole is provided along the radial direction of the circular hole on the inner surface of the receiving blind hole. A plurality of threaded holes are provided on the rotating shaft at equal intervals. The bolt passes through the through hole and is threaded into the inside of the threaded hole. The bolt head is housed inside the receiving blind hole. The rotating wheel makes rolling contact with the side of the drive blade.

[0021] As a further description of the above technical solution: by utilizing the irregular shape of the drive blades and using a rotating wheel to achieve the rolling connection between the screening frame and the drive blades, the screening frame can perform lateral reciprocating motion, which helps to evenly spread the grains in the screening frame on the screening mesh and improve the actual screening effect.

[0022] The second drive mechanism includes a gear sleeved on a rotating shaft, an internal gear ring meshing with the gear, and a protrusion fixed on the internal gear ring. The protrusion has an arc-shaped structure, and its center is located on the axis of the internal gear ring. The top surface of the protrusion is connected to the top surface of the internal gear ring through inclined surfaces at both ends. A base plate is provided at the bottom of the internal gear ring, and an annular guide rail is fixed on the upper surface of the base plate. Several second sliders are slidably connected on the annular guide rail. The second sliders are fixedly connected to the internal gear ring, and several support legs are fixed at the bottom of the base plate.

[0023] As a further description of the above technical solution: the gear rotates together with the rotating shaft, and the internal gear ring is much larger than the gear, thus achieving the deceleration of the rotating shaft speed. The internal gear ring will only rotate once after the rotating shaft has rotated many times. That is, the screening mechanism will only complete one tilt after the rotating shaft has rotated many times.

[0024] A collection assembly is provided on the bottom support plate directly below the screening mechanism. The collection assembly includes a bottom frame fixed to the bottom support plate and two storage boxes slidably connected to the bottom frame. The openings of the two storage boxes face upwards, and the two storage boxes are arranged in sequence along the vertical direction. Two square holes are opened on one side of each storage box, and one end of each storage box passes through the square holes and is fixed to a limiting plate.

[0025] A method for using a multi-stage screening device for grain detection includes the following steps:

[0026] Step 1: Select a certain amount of grains to be screened and put them into the top screening mechanism of the screening component;

[0027] Step Two: Start the geared motor to drive the rotating shaft. On one hand, the rotation of the rotating shaft will drive the drive blades to rotate. At this time, the elastic force of the compression spring acts on the screening frame, causing the rotating wheel to press against the edge of the drive blade. Since the drive blade is irregularly shaped, the rotating wheel will always be in contact with the edge of the drive blade during the rotation process, thus causing the screening frame to perform lateral reciprocating motion. On the other hand, the rotating shaft will drive the gear to rotate, which will cause the internal gear ring to rotate. Therefore, the protrusion will start to rotate. When the protrusion rotates to the point where its inclined surface contacts the bottom of the first baffle, the protrusion will cause multiple first baffles to gradually move upward. At this time, multiple screening frames and screening screens will start to tilt until the protrusion is completely removed from the bottom of the first baffle, and the screening screen returns to a horizontal state, realizing multi-stage screening of grains.

[0028] Step 3: After a certain period of time, open the latch and then open the baffle plate. The grains remaining on each screening screen can then be discharged using the discharge port and discharge hopper.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] 1. In this invention, by dividing the drive assembly into two parts, a first drive mechanism and a second drive mechanism, a single geared motor can drive multiple screening mechanisms to perform multi-stage screening of grains and control the tilting and unloading of the screening mechanisms, thus achieving full and thorough utilization of the kinetic energy generated by the geared motor. At the same time, since the grains in each screening mechanism can be screened for a long time without unloading, the grains can be completely and thoroughly screened.

[0031] 2. In this invention, by setting a second guide sleeve that can slide vertically along the strip-shaped vertical hole and sliding the second guide sleeve on the first guide rod, the first baffle can always be kept straight up and down during the tilting process of the screening mechanism. Conversely, the liftable and sliding second guide sleeve provides a basis for the tilting of the screening mechanism.

[0032] 3. In this invention, the irregular shape of the driving blades is used, and the rotating wheel is used to realize the rolling connection between the screening frame and the driving blades, so that the screening frame can perform lateral reciprocating motion, which is beneficial to make the grains in the screening frame evenly spread on the screening mesh and improve the actual screening effect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0034] Figure 2This is a schematic diagram of the screening mechanism of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0035] Figure 3 This is a partial structural schematic diagram of the screening mechanism of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0036] Figure 4 This is a schematic diagram of the screening frame of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0037] Figure 5 This is a schematic diagram of the shielding plate in a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0038] Figure 6 This is a cross-sectional structural diagram of the shielding plate of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0039] Figure 7 This is a schematic diagram of the active drive unit of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0040] Figure 8 This is a cross-sectional schematic diagram of the driving blade of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0041] Figure 9 This is a schematic diagram of the structure of a multi-stage screening device for grain detection and its usage method proposed in this invention, showing the structure of the strip-shaped vertical holes.

[0042] Figure 10 This is a cross-sectional view of the first slider of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0043] Figure 11 This invention provides a multi-stage screening device for grain detection and its usage method. Figure 1 A partial structural diagram;

[0044] Figure 12 This is a schematic diagram of the support assembly of a multi-stage screening device for grain detection and its usage method proposed in this invention;

[0045] Figure 13 This is a schematic diagram of the structure of the collection component of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0046] Figure 14 This is a cross-sectional view of the bottom frame of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0047] Figure 15 This is a partial structural diagram of the driving component of a multi-stage screening device for grain detection and its usage method proposed in this invention.

[0048] Legend: 100, Screening component; 110, Screening mechanism; 111, Screening frame; 1111, Discharge port; 112, Screening mesh; 113, Discharge hopper; 114, Baffle plate; 1141, Hinge; 1142, Lock; 120, Support mechanism; 121, First guide rod; 122, First guide sleeve; 123, Compression spring; 124, First baffle; 1241, Strip-shaped vertical hole; 1242, First slider; 1243, Second guide sleeve; 1244, Rotating rod; 125, Second baffle; 1251, Groove; 126, Third guide sleeve; 200, Support assembly; 210, Bottom support plate; 220, Second guide rod; 230, Fixing sleeve; 30 0. Drive assembly; 310. First drive mechanism; 311. Gear motor; 312. Rotating shaft; 313. Active drive unit; 3131. Drive blade; 3132. Circular hole; 3133. Storage blind hole; 3134. Through hole; 3135. Bolt; 3136. Threaded hole; 314. Driven unit; 3141. Vertical plate; 3142. Rotating wheel; 320. Second drive mechanism; 321. Internal gear ring; 322. Gear; 323. Protrusion; 324. Base plate; 325. Circular guide rail; 326. Second slider; 327. Support leg; 400. Collection assembly; 410. Base frame; 411. Square hole; 420. Storage box; 421. Limiting plate. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please see Figures 1-15 This invention provides a technical solution: a multi-stage screening device for grain detection and its usage method, such as... Figure 1 As shown, the multi-stage grain screening device described above includes a screening component 100, a support component 200, and a drive component 300. Specifically, the screening component 100 is used to perform multi-stage screening of grains, the support component 200 is used to support the screening component 100, and the drive component 300 provides driving force for the screening component 100 to screen grains. The screening component 100, the support component 200, and the drive component 300 are described in detail below.

[0051] like Figure 1 , Figure 2 and Figure 11 As shown, the screening assembly 100 includes multiple screening mechanisms 110 arranged sequentially in a vertical direction. Each screening mechanism 110 includes a screening mesh 112. In the vertically downward direction, the mesh diameter of the multiple screening meshes 112 gradually decreases. In this way, the different mesh diameters of the screening meshes 112 can be used to achieve step-by-step screening of grains. The drive assembly 300 includes a first drive mechanism 310 and a second drive mechanism 320. The first drive mechanism 310 is used to drive the screening mechanism 110 to perform lateral reciprocating motion, and the second drive mechanism 320 is used to drive the screening mesh 112 to tilt. By dividing the drive assembly 300 into two parts, the first drive mechanism 310 and the second drive mechanism 320, a single geared motor 311 can drive multiple screening mechanisms 110 to perform multi-stage screening of grains and control the tilting and unloading of the screening mechanisms 110. This achieves full and thorough utilization of the kinetic energy generated by the geared motor 311. At the same time, since the grains in each screening mechanism 110 can be screened for a long time without unloading, the grains can be completely and thoroughly screened.

[0052] like Figures 2 to 6 As shown, the screening mechanism 110 also includes a screening frame 111 fixed to the top surface of the screening mesh 112. The screening mesh 112 and the screening frame 111 can form a square box-shaped structure with the bottom of the screening mesh 112 open at the top. In use, grains are poured from the top of the screening frame 111 of the first screening mechanism 110 onto the screening mesh 112 connected to the screening frame 111. In this way, when the screening mechanism 110 shakes, the grains on the screening mesh 112 will be confined by the screening frame 111, thereby preventing the grains from falling outside the screening frame 111. A discharge component is provided at one end of the screening frame 111. The discharge component includes a material opening in the screening frame 111. The discharge port 1111 on one end face of the screening mechanism 110, the baffle 114 set at one end of the screening frame 111 for opening and closing the discharge port 1111, and the discharge hopper 113, after the second drive mechanism 320 drives the screening mechanism 110 to tilt, the hinge 1141 can be opened manually, and then the baffle 114 can be opened. Then the screening grains can be discharged by the cooperation of the discharge port 1111 and the discharge hopper 113. One end of the baffle 114 is hinged to the screening frame 111 by the hinge 1141, and the other end is fastened to the screening frame 111 by the latch 1142. The discharge hopper 113 is used to receive the material discharged through the discharge port 1111.

[0053] like Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10As shown, the screening assembly 100 also includes a support mechanism 120 for supporting the screening mechanism 110. The support mechanism 120 includes two first guide rods 121, a first guide sleeve 122 fixed to the screening frame 111 and slidably sleeved on the first guide rods 121, two compression springs 123, a second baffle 125 hinged to one end of the two first guide rods 121, and a first baffle 124 disposed at the other end of the two first guide rods 121. After the first guide rods 121 and the second baffle 125 are hinged, the first guide rods 121 can rotate in the vertical plane about the hinge point of the first guide rods 121 and the second baffle 125 as the center, so that they can cooperate with the second drive mechanism 320 to make the screening mechanism 110 lean against the second drive mechanism 320. The end near the first baffle 124 moves upward, thus tilting the screening mechanism 110. The upper surface of the first baffle 124 is flush with the upper surface of the second baffle 125, and the lower surface of the first baffle 124 is flush with the lower surface of the second baffle 125. In this way, after arranging multiple screening mechanisms 110 together from bottom to top, the multiple screening mechanisms 110 can maintain a parallel state. The compression spring 123 is connected between the first guide sleeve 122 and the second baffle 125. The compression spring 123 can push the screening frame 111 so that the rotating wheel 3142, which will be described below, and the side of the drive blade 3131 always maintain rolling contact. The second baffle 125 has a slot 1251 for the discharge hopper 113 to pass through.

[0054] like Figure 2 , Figure 9 and Figure 10 As shown, a strip-shaped vertical hole 1241 is provided on the first baffle 124 at the position corresponding to the first guide rod 121. A first slider 1242 that can slide vertically is slidably connected inside the strip-shaped vertical hole 1241, as shown. Figure 9 and Figure 10 As shown, two first sliders 1242 are provided, which are slidably installed on the two vertical inner walls of the strip-shaped vertical hole 1241 respectively. A second guide sleeve 1243 is rotatably installed on the first slider 1242 via a rotating rod 1244. The second guide sleeve 1243 is located between the two first sliders 1242 and is slidably sleeved on the first guide rod 121. By providing a second guide sleeve 1243 that can slide vertically along the strip-shaped vertical hole 1241 and slidably sleeved on the first guide rod 121, the first baffle 124 can always be kept straight up and down during the tilting process of the screening mechanism 110. Conversely, the liftable and sliding second guide sleeve 1243 provides a basis for the tilting of the screening mechanism 110.

[0055] like Figure 1 , Figure 2 , Figure 11 and Figure 12As shown, the screening component 100 is supported by the bracket assembly 200. The bracket assembly 200 includes a horizontally arranged bottom support plate 210 and four vertically arranged second guide rods 220 fixed at the four corners of the bottom support plate 210. The cooperation of the third guide sleeve 126 and the second guide rods 220 provides a basis for the tilting of the screening mechanism 110 and facilitates the quick installation and disassembly of the screening mechanism 110 by the staff. Each second guide rod 220 is fixedly fitted with a fixing sleeve 230. The fixing sleeve 230 is used to support the third guide sleeve 126, so that the screening mechanism 110 at the bottom can be suspended at a certain height. Two third guide sleeves 126 are fixed on the first baffle 124 and the second baffle 125. The third guide sleeves 126 are slidably fitted onto the second guide rods 220.

[0056] like Figure 2 , Figure 7 , Figure 8 , Figure 11 and Figure 15 As shown, the first drive mechanism 310 includes a geared motor 311 mounted on the base plate 210, a rotating shaft 312 arranged vertically and fixedly connected to the output shaft of the geared motor 311, an active drive unit 313 arranged on the rotating shaft 312 and equal in number to the screening mechanism 110, and a driven drive unit 314 arranged at the other end of the screening frame 111 and cooperating with the active drive unit 313. The geared motor 311 is used to convert electrical energy into mechanical energy to drive the rotating shaft 312 to rotate; the driven drive unit 314... 14 includes a vertical plate 3141 fixed to the other end of the screening frame 111 and a rotating wheel 3142 rotatably mounted on the end of the vertical plate 3141 away from the screening frame 111. The rotating wheel 3142 rolls in contact with the side of the drive blade 3131, which will be described below. The axial length of the rotating wheel 3142 is greater than the axial length of the drive blade 3131 along the rotating wheel 3142. In this way, as the screening frame 111 gradually tilts, the rotating wheel 3142 can always maintain rolling contact with the drive blade 3131.

[0057] The active drive unit 313 includes a drive blade 3131, a circular hole 3132 formed in the drive blade 3131 for the rotating shaft 312 to pass through, and a bolt 3135 for mounting the drive blade 3131 to the rotating shaft 312. A receiving blind hole 3133 is formed on the side of the drive blade 3131. A through hole 3134 communicating with the circular hole 3132 is formed along the radial direction of the circular hole 3132 on the inner surface of the receiving blind hole 3133. A plurality of threaded holes 3136 are equidistantly arranged on the rotating shaft 312. The bolt 3135 passes through the through hole 3134 and is threaded into the inner surface of the threaded hole 3136. The bolt head of bolt 3135 is housed inside the blind hole 3133 to prevent the bolt head of bolt 3135 from protruding from the edge of the drive blade 3131 and to avoid the bolt head of bolt 3135 from adversely affecting the rolling of the rotating wheel 3142. In the above solution, the irregular shape of the drive blade 3131 is used, and the rotating wheel 3142 is used to realize the rolling connection between the screening frame 111 and the drive blade 3131, so that the screening frame 111 can perform lateral reciprocating motion, which is beneficial to make the grain in the screening frame 111 evenly spread on the screening screen 112 and improve the actual screening effect.

[0058] like Figure 15 As shown, the second drive mechanism 320 includes a gear 322 sleeved on the rotating shaft 312, an internal gear ring 321 meshing with the gear 322, and a protrusion 323 fixed on the internal gear ring 321. The gear 322 rotates together with the rotating shaft 312, and the internal gear ring 321 is much larger than the gear 322, thus achieving a reduction in the rotational speed of the rotating shaft 312. The internal gear ring 321 will only rotate once after the rotating shaft 312 has rotated many times. That is, the screening mechanism 110 will only tilt once after the rotating shaft 312 has rotated many times. The protrusion 323 has an arc-shaped structure, and the center of the protrusion 323 is located on the axis of the internal gear ring 321. The top surface of the protrusion 323 is provided with two ends. The inclined surface is connected to the top surface of the internal gear ring 321. This inclined surface is used to connect the top surface of the protrusion 323 and the top surface of the internal gear ring 321, so that the first baffle 124 can slide smoothly to the top of the protrusion 323. The bottom of the internal gear ring 321 is provided with a base plate 324. The upper surface of the base plate 324 is fixed with an annular guide rail 325. Several second sliders 326 are slidably connected to the annular guide rail 325. The second sliders 326 are fixedly connected to the internal gear ring 321. Several support legs 327 are fixed to the bottom of the base plate 324. The support legs 327 cooperate with the base plate 324 to support the internal gear ring 321. Then, combined with the action of the annular guide rail 325 and the second sliders 326, the internal gear ring 321 can rotate stably.

[0059] like Figure 11 , Figure 13 and Figure 14As shown, a collection component 400 is provided on the bottom support plate 210 directly below the screening mechanism 110. The collection component 400 includes a bottom frame 410 fixedly connected to the bottom support plate 210 and two storage boxes 420 slidably connected to the bottom frame 410. The openings of the two storage boxes 420 face upwards, and the two storage boxes 420 are arranged vertically in sequence. In actual use, the storage box 420 at the top of the collection component 400 will receive the falling material first. When it is necessary to clean the storage box 420, it can be directly pulled out from the inside of the bottom frame 410. Since there is still a storage box 420, the material will not leak into the bottom frame 410. Two square holes 411 are opened on one side of the storage box 420. One end of the storage box 420 passes through the square holes 411 and is fixedly connected to a limiting plate 421.

[0060] A method for using a multi-stage screening device for grain detection includes the following steps:

[0061] Step 1: Select a certain amount of grains to be screened and put them into the top screening mechanism 110 of the screening component 100;

[0062] Step Two: Start the geared motor 311, which drives the rotating shaft 312 to rotate. The rotation of the rotating shaft 312 causes the drive blade 3131 to rotate. At this time, the spring force of the compression spring 123 acts on the screening frame 111, causing the rotating wheel 3142 to press against the edge of the drive blade 3131. Since the drive blade 3131 is irregularly shaped, the rotating wheel 3142 will remain in contact with the edge of the drive blade 3131 during rotation, thus causing the screening frame 111 to reciprocate laterally. On the one hand, the rotating shaft 312 drives the gear 322 to rotate, and the gear 322 causes the internal gear ring 321 to rotate. Therefore, the protrusion 323 starts to rotate. When the protrusion 323 rotates to the point where its inclined surface contacts the bottom of the first baffle 124, the protrusion 323 will cause the multiple first baffles 124 to gradually move upward. At this time, the multiple screening frames 111 and the screening screen 112 begin to tilt until the protrusion 323 is completely removed from the bottom of the first baffle 124, and the screening screen 112 returns to a horizontal state, thus realizing multi-stage screening of grains.

[0063] Step 3: After a certain period of time, open the latch 1142 and then open the baffle 114. The grains left on each screening screen 112 after screening can be discharged using the discharge port 1111 and the discharge hopper 113.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage screening device for grain detection, comprising a screening component (100) and a driving component (300), characterized in that, The screening component (100) includes a plurality of screening mechanisms (110) arranged sequentially in the vertical direction. Each screening mechanism (110) includes a screening mesh (112). In the vertically downward direction, the mesh diameter of the plurality of screening meshes (112) gradually decreases. The drive assembly (300) includes a first drive mechanism (310) and a second drive mechanism (320), wherein the first drive mechanism (310) is used to drive the screening mechanism (110) to perform lateral reciprocating motion, and the second drive mechanism (320) is used to drive the screening mesh (112) to tilt. The screening mechanism (110) also includes a screening frame (111) fixed on the top surface of the screening mesh (112). A discharge component is provided at one end of the screening frame (111). The discharge component includes a discharge port (1111) opened on one end face of the screening frame (111), a baffle plate (114) provided at one end of the screening frame (111) for opening and closing the discharge port (1111), and a discharge hopper (113). One end of the baffle plate (114) is hinged to the screening frame (111) by a hinge (1141), and the other end is fastened to the screening frame (111) by a latch (1142). The discharge hopper (113) is used to receive the material discharged through the discharge port (1111). The screening assembly (100) further includes a support mechanism (120) for supporting the screening mechanism (110). The support mechanism (120) includes two first guide rods (121), a first guide sleeve (122) fixed on the screening frame (111) and slidably sleeved on the first guide rods (121), two compression springs (123), a second baffle (125) hinged to one end of the two first guide rods (121), and a first baffle (124) disposed at the other end of the two first guide rods (121). The upper surface of the first baffle (124) is flush with the upper surface of the second baffle (125), and the lower surface of the first baffle (124) is flush with the lower surface of the second baffle (125). The compression spring (123) is connected between the first guide sleeve (122) and the second baffle (125). The second baffle (125) has a slot (1251) for the discharge hopper (113) to pass through. The first baffle (124) has a strip-shaped vertical hole (1241) at the position corresponding to the first guide rod (121). A first slider (1242) that can slide vertically is slidably connected inside the strip-shaped vertical hole (1241). A second guide sleeve (1243) is rotatably installed on the first slider (1242) through a rotating rod (1244). The second guide sleeve (1243) is slidably sleeved on the first guide rod (121). The screening component (100) is supported by a bracket assembly (200). The bracket assembly (200) includes a horizontally arranged bottom support plate (210) and four vertically arranged second guide rods (220) fixed at the four corners of the bottom support plate (210). Each second guide rod (220) is fixedly fitted with a fixing sleeve (230). The first baffle (124) and the second baffle (125) are each fixed with two third guide sleeves (126). The third guide sleeves (126) are slidably fitted onto the second guide rods (220). The first drive mechanism (310) includes a geared motor (311) mounted on the bottom support plate (210), a rotating shaft (312) arranged in the vertical direction and fixed to the output shaft of the geared motor (311), an active drive unit (313) arranged on the rotating shaft (312) and equal in number to the screening mechanism (110), and a driven drive unit (314) arranged at the other end of the screening frame (111) and cooperating with the active drive unit (313); the driven drive unit (314) includes a vertical plate (3141) fixed at the other end of the screening frame (111) and a rotating wheel (3142) rotatably mounted on the end of the vertical plate (3141) away from the screening frame (111). The active drive unit (313) includes a drive blade (3131), a circular hole (3132) formed in the drive blade (3131) for the rotating shaft (312) to pass through, and a bolt (3135) for mounting the drive blade (3131) onto the rotating shaft (312). A receiving blind hole (3133) is formed on the side of the drive blade (3131), and along the diameter of the circular hole (3132) on the inner surface of the receiving blind hole (3133). A through hole (3134) communicating with a circular hole (3132) is provided. A plurality of threaded holes (3136) are provided on the rotating shaft (312) at equal intervals. The bolt (3135) passes through the through hole (3134) and is threaded into the inside of the threaded hole (3136). The bolt head of the bolt (3135) is housed inside the blind hole (3133). The rotating wheel (3142) makes rolling contact with the side of the drive blade (3131). The second drive mechanism (320) includes a gear (322) sleeved on a rotating shaft (312), an internal gear ring (321) meshing with the gear (322), and a protrusion (323) fixed on the internal gear ring (321). The protrusion (323) has an arc-shaped structure, and the center of the protrusion (323) is located on the axis of the internal gear ring (321). The top surface of the protrusion (323) is connected to the top surface of the internal gear ring (321) through the inclined surfaces provided at both ends. A base plate (324) is provided at the bottom of the internal gear ring (321). An annular guide rail (325) is fixed on the upper surface of the base plate (324). Several second sliders (326) are slidably connected on the annular guide rail (325). The second sliders (326) are fixedly connected to the internal gear ring (321). Several support legs (327) are fixed at the bottom of the base plate (324).

2. The multi-stage screening device for grain detection according to claim 1, characterized in that, A collection component (400) is provided on the bottom support plate (210) at a position directly below the screening mechanism (110). The collection component (400) includes a bottom frame (410) fixed to the bottom support plate (210) and two storage boxes (420) slidably connected to the bottom frame (410). The openings of the two storage boxes (420) face upwards, and the two storage boxes (420) are arranged in sequence along the vertical direction. Two square holes (411) are opened on one side of the storage box (420), and one end of the storage box (420) passes through the square hole (411) and is fixedly connected to a limiting plate (421).

3. The method of using a multi-stage screening device for grain detection according to any one of claims 1-2, characterized in that, Includes the following steps: Step 1: Select a certain amount of grains to be screened and put them into the top screening mechanism (110) of the screening component (100); Step 2: Start the geared motor (311) to drive the rotating shaft (312) to rotate. On the one hand, the rotation of the rotating shaft (312) will drive the drive blade (3131) to rotate. At this time, the elastic force of the compression spring (123) acts on the screening frame (111), causing the rotating wheel (3142) to press against the edge of the drive blade (3131). Since the drive blade (3131) is irregularly shaped, the rotating wheel (3142) will always be in contact with the edge of the drive blade (3131) during the rotation process. Thus, the screening frame (111) will reciprocate laterally during this process. On the one hand, the rotating shaft (312) drives the gear (322) to rotate, and the gear (322) causes the internal gear ring (321) to rotate. Therefore, the protrusion (323) starts to rotate. When the protrusion (323) rotates to the point where its inclined surface contacts the bottom of the first baffle (124), the protrusion (323) causes multiple first baffles (124) to gradually move upward. At this time, multiple screening frames (111) and screening screen (112) begin to tilt until the protrusion (323) is completely removed from the bottom of the first baffle (124), and the screening screen (112) returns to a horizontal state, thus realizing multi-level screening of grains. Step 3: After a certain period of time, open the latch (1142) and then open the baffle (114) to discharge the grains left on each screening screen (112) after screening using the discharge port (1111) and discharge hopper (113).

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