CN115634830A

CN115634830A - Multi-stage screening device for grain detection and using method thereof

Info

Publication number: CN115634830A
Application number: CN202211285161.0A
Authority: CN
Inventors: 张琪
Original assignee: Tai'an Food And Drug Inspection And Testing Institute Tai'an Fiber Inspection Institute
Current assignee: Tai'an Food And Drug Inspection And Testing Institute Tai'an Fiber Inspection Institute
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-01-24

Abstract

The invention discloses a multistage screening device for grain detection and a using method thereof, belonging to the technical field of grain screening, and comprising a screening assembly and a driving assembly, wherein the screening assembly comprises a plurality of screening mechanisms which are sequentially arranged along the vertical direction, each screening mechanism comprises a screening net, and the diameters of meshes of the screening nets are gradually reduced along the vertical downward direction; the driving assembly comprises a first driving mechanism and a second driving mechanism. According to the grain screening machine, the driving assembly is divided into the first driving mechanism and the second driving mechanism, so that one speed reducing motor can be used for driving a plurality of screening mechanisms to carry out multistage screening on grains, and can also be used for controlling inclined discharging of the screening mechanisms, the kinetic energy generated by the speed reducing motor is fully and thoroughly utilized, and simultaneously, grains in each screening mechanism can be screened for a long time without discharging, so that the grains can be completely and thoroughly screened.

Description

Multi-stage screening device for grain detection and using method thereof

Technical Field

The invention belongs to the technical field of grain screening, and particularly relates to a multi-stage screening device for grain detection and a using method thereof.

Background

Cereals are widely covered, and comprise rice, wheat, millet, soybean and other coarse cereals. The cereals include rice, wheat, millet, soybean, etc., and are mainly plant seeds and fruits. Is a traditional staple food for many asian people.

From the human metabolism point of view, it is very suitable to use grains as the main source of heat energy. The starch and sugar which provide heat energy in the grains have simple structure, can be quickly oxidized and decomposed by human bodies, and can obtain a large amount of heat energy in a period of time. The final products of oxidative decomposition, carbon dioxide and water, can be discharged directly from the reactor relatively easily.

The detection of grains involves many detection directions, such as detecting the moisture in the rice, which is a chemical component of the rice. The moisture content of the rice greatly affects the processing of the polished rice. When the water content of the paddy is high, the fluidity of the paddy is poor, so that the cleaning and the rough separation of the paddy are difficult, the shelling efficiency is reduced, the processing strength of the paddy is influenced, the broken rice rate is high, the power consumption is high easily caused in the processing, and the production cost is increased; when the moisture content of the rice is too low, although the rice is beneficial to husking, the skin layer and the endosperm are tightly combined because of the too low moisture content, the grinding is difficult, and the processing is also not beneficial.

Before cereal detects, usually utilize multistage screening ware to screen cereal, get rid of the material that impurity etc. influence detection accuracy wherein, present multistage screening ware adopts the structure of roll formula usually, promptly, utilizes the screening passageway that keeps the slope, drops into the cereal of waiting to screen in the peak position of this passageway, utilizes the roll of cereal to reach the purpose of multistage screening, and the drawback that this mode exists is: because cereal can only flow through the screening passageway once, the screening of once only is difficult with cereal complete screening clean, can't obtain the cereal that accords with actual screening demand, and want to make cereal flow through the screening passageway once more, just need drop into from the peak position department of screening passageway again after collecting this cereal after screening, extravagant manpower and materials.

Disclosure of Invention

The invention aims to: in order to solve the problems in the background art, a multi-stage screening device for grain detection and a using method thereof are provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multi-stage screening device for grain detection and a using method thereof comprise a screening component and a driving component, wherein the screening component comprises a plurality of screening mechanisms which are sequentially arranged along the vertical direction, each screening mechanism comprises a screening net, and the diameters of the meshes of the screening nets are gradually reduced along the vertical downward direction;

the driving assembly comprises a first driving mechanism and a second driving mechanism, wherein the first driving mechanism is used for driving the screening mechanism to perform transverse reciprocating motion, and the second driving mechanism is used for driving the screening net to incline.

As a further description of the above technical solution: through being divided into first actuating mechanism and second actuating mechanism two parts with drive assembly to utilize a gear motor both can drive a plurality of screening mechanisms and carry out multistage screening to cereal, also can control the slope of screening mechanism and unload, realized the abundant thorough utilization of the kinetic energy that produces gear motor, simultaneously because the cereal in every screening mechanism can all carry out long-time screening and can not unload, consequently can carry out complete thorough screening to cereal.

Screening mechanism is still including fixing the screening frame at screening net top surface the one end of screening frame is provided with the part of unloading, the part of unloading is including seting up discharge gate on screening frame terminal surface, setting up at screening frame one end and be used for opening and closing the shielding plate and the play hopper of discharge gate, and the one end of this shielding plate is passed through the hinge and is articulated with the screening frame, and the other end passes through hasp and screening frame lock joint, it is used for receiving through discharge gate exhaust material to go out the hopper.

As a further description of the above technical solution: the screening net is matched with the screening frame to form a square box-shaped structure with the bottom being an opening at the top of the screening net, when the grain screening machine is used, grains are poured onto the screening net connected with the screening frame from the top of the screening frame of the first screening mechanism, so that the grains on the screening net can be limited by the screening frame in the shaking process of the screening mechanism, and the grains are prevented from falling outside the screening frame; after second actuating mechanism drive screening mechanism slope, can manually open the hinge, open the shielding plate again, then can utilize the cooperation of discharge gate and play hopper to discharge the cereal after the screening.

The screening subassembly is still including the supporting mechanism who is used for supporting screening mechanism, the supporting mechanism includes two first guide bars, fixes on the screening frame and slides and cup joints first uide bushing, two compression spring on first guide bar, articulates at the second baffle of two first guide bar one ends and sets up the first baffle at two first guide bar other ends, the upper surface of first baffle and the upper surface looks parallel and level of second baffle, and the lower surface of first baffle and the lower surface looks parallel and level of second baffle, compression spring connects between first uide bushing and second baffle, set up the notch that supplies out the hopper and pass on the second baffle.

As a further description of the above technical solution: after the first guide rod is hinged with the second baffle, the first guide rod can rotate on a vertical plane by taking the hinged point of the first guide rod and the second baffle as the circle center, so that the end, close to the first baffle, of the screening mechanism can move upwards by matching with the second driving mechanism, and the inclination of the screening mechanism is also realized; the upper surface of first baffle and the upper surface looks parallel and level of second baffle, and the lower surface of first baffle and the lower surface looks parallel and level of second baffle, arrange a plurality of screening mechanisms from the bottom up after together like this, a plurality of screening mechanisms all can keep the state that parallels, and compression spring can promote the screening frame, makes the swiveling wheel that will describe below and drive blade's side remain rolling contact all the time.

The utility model discloses a vertical slide's of bar, including first baffle, second baffle, first guide bar, the bar is seted up corresponding first guide bar on the first baffle and is erected the hole the inside sliding connection that the hole was erect to the bar has the first slider that can vertically slide, rotate through the dwang on the first slider and install the second uide bushing, the second uide bushing slides and cup joints on first guide bar.

As a further description of the above technical solution: can erect the vertical gliding second uide bushing in hole along the bar through the setting to slide this second uide bushing and cup joint on first guide bar, thereby at the in-process of screening mechanism slope, can remain throughout that first baffle is straight-up down, on the contrary, liftable gliding second uide bushing provides the basis for the slope of screening mechanism.

The screening subassembly passes through the support subassembly and supports, the support subassembly includes the end extension board that the level set up and fixes four second guide bars that just vertically set up in four corner positions of end extension board, every fixed cover has been cup jointed on the second guide bar, all be fixed with two third uide bushings on first baffle and the second baffle, the third uide bushing slides and cup joints on the second guide bar.

As a further description of the above technical solution: the cooperation of third uide bushing and second guide bar had both provided the basis for the slope of screening mechanism, also made things convenient for the quick installation of staff and dismantled screening mechanism.

The first driving mechanism comprises a speed reducing motor arranged on the bottom support plate, a rotating shaft arranged along the vertical direction and fixedly connected with an output shaft of the speed reducing motor, driving parts which are arranged on the rotating shaft and are equal to the screening mechanisms in number, and driven driving parts which are arranged at the other end of the screening frame and are matched with the driving parts; driven drive portion installs the swiveling wheel of keeping away from screening frame one end at the riser including fixing the riser and the rotation of screening frame other end.

The initiative drive portion includes driving vane, sets up the round hole that supplies the rotation axis to run through on driving vane and be used for installing driving vane to the epaxial bolt of rotation, seted up on driving vane's the side and accomodate the blind hole, radially seted up the through-hole that communicates with the round hole along the round hole on this internal surface of accomodating the blind hole, set up a plurality of screw holes that the equidistance was arranged on the rotation axis, the bolt passes through-hole threaded connection in the inside of screw hole, the bolt head of bolt is accomodate in the inside of accomodating the blind hole, the side rolling contact of swiveling wheel and driving vane.

As a further description of the above technical solution: the irregular shape of the driving blade is utilized, and the rotating wheel is utilized to realize the rolling connection of the screening frame and the driving blade, so that the screening frame can do transverse reciprocating motion, grains in the screening frame can be uniformly paved on a screening net, and the actual screening effect is improved.

The second driving mechanism comprises a gear sleeved on the rotating shaft, an inner gear ring meshed with the gear and a convex block fixed on the inner gear ring, the convex block is of an arc-shaped structure, the circle center of the convex block is positioned on the axis of the inner gear ring, and the top surface of the convex block is connected with the top surface of the inner gear ring through inclined surfaces arranged at two ends of the convex block; the bottom of the inner gear ring is provided with a bottom plate, an annular guide rail is fixed on the upper surface of the bottom plate, a plurality of second sliding blocks are connected to the annular guide rail in a sliding mode and fixedly connected with the inner gear ring, and a plurality of supporting legs are fixed to the bottom of the bottom plate.

As a further description of the above technical solution: the gear rotates along with the rotating shaft, and the inner gear ring is far larger than the gear, so that the rotating speed of the rotating shaft is reduced, the inner gear ring rotates for one circle after the rotating shaft rotates for many circles, namely, the screening mechanism can complete one-time inclination after the rotating shaft rotates for many circles.

The utility model discloses a screening mechanism, including the bottom extension board, the bottom extension board is located the screening mechanism and is provided with the collection subassembly, should collect the subassembly include with the underframe of bottom extension board rigid coupling and with two receivers of this underframe sliding connection, two the box mouth of receiver is all up, and two receivers are arranged along vertical direction in proper order, two quad slit have been seted up to one side of receiver, the one end of receiver is passed quad slit and rigid coupling has the limiting plate.

A use method of a multi-stage screening device for grain detection comprises the following steps:

the method comprises the following steps: selecting a certain amount of grains to be screened and putting the grains into a screening mechanism which is positioned at the topmost part on a screening component;

step two: the speed reduction motor is started to drive the rotating shaft to rotate, on one hand, the rotating shaft can drive the driving blade to rotate, at the moment, the elastic force of the compression spring acts on the screening frame, so that the rotating wheel is tightly pressed at the edge position of the driving blade, and the driving blade is in an irregular shape, therefore, the rotating wheel can be always contacted with the edge position of the driving blade in the rotating process of the driving blade, and the screening frame in the process can transversely reciprocate; on the other hand, the rotating shaft drives the gear to rotate, the gear can enable the inner gear ring to rotate, therefore, the protruding blocks start to rotate, when the protruding blocks rotate until the inclined surfaces of the protruding blocks are in contact with the bottom end of the first baffle at the bottommost part, the protruding blocks can enable the first baffles to gradually move upwards, the screening frames and the screening nets start to incline at the moment, and the screening nets recover to be in a horizontal state until the protruding blocks are completely moved away from the bottom of the first baffles, so that multi-stage screening of grains is realized;

step three: after a certain time, open the shielding plate again after the hasp, can utilize the discharge gate to discharge the cereal of staying after the screening with going out the hopper on every screen net.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the grain screening machine, the driving assembly is divided into the first driving mechanism and the second driving mechanism, so that one speed reducing motor can be used for driving a plurality of screening mechanisms to carry out multistage screening on grains, and can also be used for controlling inclined discharging of the screening mechanisms, the kinetic energy generated by the speed reducing motor is fully and thoroughly utilized, and simultaneously, grains in each screening mechanism can be screened for a long time without discharging, so that the grains can be completely and thoroughly screened.

2. According to the invention, the second guide sleeve capable of vertically sliding along the strip-shaped vertical hole is arranged and is sleeved on the first guide rod in a sliding manner, so that the first baffle can be always kept straight up and down in the process of inclining the screening mechanism, and conversely, the second guide sleeve capable of lifting and sliding provides a foundation for inclining the screening mechanism.

3. According to the invention, the rolling connection between the screening frame and the driving blades is realized by utilizing the irregular shape of the driving blades and utilizing the rotating wheel, so that the screening frame can transversely reciprocate, grains in the screening frame can be uniformly spread on the screening net, and the actual screening effect is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a multi-stage screening device for grain inspection and the method of using the same according to the present invention;

FIG. 2 is a schematic structural diagram of a multi-stage screening device for grain inspection and a screening mechanism using the same according to the present invention;

FIG. 3 is a partial structural view of a multi-stage screening device for grain inspection and a screening mechanism using the same according to the present invention;

FIG. 4 is a schematic structural diagram of a multi-stage screening device for grain inspection and a screening frame using the same according to the present invention;

FIG. 5 is a schematic structural diagram of a multi-stage screening device for grain inspection and a shielding plate used in the method;

FIG. 6 is a schematic cross-sectional view of a multi-stage screening device for grain inspection and a method of using the same according to the present invention;

FIG. 7 is a schematic structural diagram of an active driving part of a multi-stage sifter for grain inspection and a method for using the same according to the present invention;

FIG. 8 is a schematic cross-sectional view of a multi-stage sifter for grain inspection and a method for using the same to drive a blade according to the present invention;

FIG. 9 is a schematic structural diagram of a multi-stage screening device for grain inspection and a bar-shaped vertical hole used in the method;

FIG. 10 is a schematic cross-sectional view of a multi-stage sifter for grain inspection and a method of using the same according to the present invention;

FIG. 11 is a schematic view of a portion of FIG. 1 illustrating a multi-stage screening apparatus for grain inspection and a method of using the same according to the present invention;

FIG. 12 is a schematic view of a multi-stage sifter for grain inspection and a bracket assembly using the same according to the present invention;

FIG. 13 is a schematic view of a multi-stage screening apparatus for grain inspection and a collection assembly using the same according to the present invention;

FIG. 14 is a schematic cross-sectional view of a multi-stage sifter for grain inspection and a method for using the same, showing the structure of a bottom frame;

FIG. 15 is a partial schematic view of a multi-stage screening apparatus for grain inspection and a driving assembly thereof according to the present invention.

Illustration of the drawings: 100. a screening component; 110. a screening mechanism; 111. screening frames; 1111. a discharge port; 112. screening a net; 113. a discharge hopper; 114. a shielding plate; 1141. a hinge; 1142. locking; 120. a support mechanism; 121. a first guide bar; 122. a first guide sleeve; 123. a compression spring; 124. a first baffle; 1241. a bar-shaped vertical hole; 1242. a first slider; 1243. a second guide sleeve; 1244. rotating the rod; 125. a second baffle; 1251. a notch; 126. a third guide sleeve; 200. a bracket assembly; 210. a bottom support plate; 220. a second guide bar; 230. fixing a sleeve; 300. a drive assembly; 310. a first drive mechanism; 311. a reduction motor; 312. a rotating shaft; 313. an active drive section; 3131. a driving blade; 3132. a circular hole; 3133. a receiving blind hole; 3134. a through hole; 3135. a bolt; 3136. a threaded hole; 314. a driven driving part; 3141. a vertical plate; 3142. a rotating wheel; 320. a second drive mechanism; 321. an inner gear ring; 322. a gear; 323. a raised block; 324. a base plate; 325. an annular guide rail; 326. a second slider; 327. a support leg; 400. a collection assembly; 410. a bottom frame; 411. a square hole; 420. a storage box; 421. and a limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-15, the present invention provides a technical solution: as shown in fig. 1, the multi-stage screening device for grain inspection includes a screening assembly 100, a bracket assembly 200 and a driving assembly 300, specifically, the screening assembly 100 is used for realizing multi-stage screening of grains, the bracket assembly 200 is used for supporting the screening assembly 100, and the driving assembly 300 is used for providing driving force for the screening assembly 100 to screen grains, and the screening assembly 100, the bracket assembly 200 and the driving assembly 300 are described in detail below.

As shown in fig. 1, 2 and 11, the screening assembly 100 includes a plurality of screening mechanisms 110 arranged in sequence in a vertical direction, each screening mechanism 110 includes a screening net 112, and the diameters of the meshes of the plurality of screening nets 112 are gradually reduced in a vertically downward direction, so that the grains can be screened step by using different diameters of the meshes of the screening nets 112; the driving assembly 300 comprises a first driving mechanism 310 and a second driving mechanism 320, wherein the first driving mechanism 310 is used for driving the screening mechanism 110 to perform transverse reciprocating motion, and the second driving mechanism 320 is used for driving the screening net 112 to incline; the driving assembly 300 is divided into the first driving mechanism 310 and the second driving mechanism 320, so that one speed reducing motor 311 can drive a plurality of screening mechanisms 110 to carry out multi-stage screening on grains, and can also control the inclined discharging of the screening mechanisms 110, the full and thorough utilization of the kinetic energy generated by the speed reducing motor 311 is realized, and simultaneously, grains in each screening mechanism 110 can be screened for a long time without discharging, so that the grains can be screened completely and thoroughly.

As shown in fig. 2 to 6, the screening mechanism 110 further includes a screening frame 111 fixed on the top surface of the screening net 112, the screening net 112 and the screening frame 111 may form a square box structure with an open top at the bottom, when in use, grains are poured from the top of the screening frame 111 of the first screening mechanism 110 onto the screening net 112 connected to the screening frame 111, so that the grains on the screening net 112 are limited by the screening frame 111 during shaking of the screening mechanism 110, thereby preventing the grains from falling outside the screening frame 111, a discharging member is provided at one end of the screening frame 111, the discharging member includes a discharge port 1111 formed on one end surface of the screening frame 111, a shielding plate 114 provided at one end of the screening frame 111 and used for opening and closing the discharge port 1111, and a discharge hopper 113, after the second driving mechanism 320 drives the screening mechanism 110 to tilt, the shielding plate 1141 may be manually opened, the shielding plate 114 may be opened, and then the screened grains may be discharged by cooperation of the discharge port 1111 and the discharge hopper 113, one end of the shielding plate 114 may be hinged to the screening frame 111 through a hinge, and the other end of the screening frame 1142 may be hinged to receive the grains discharged through the discharge port 1142.

As shown in fig. 2, 3, 8, 9 and 10, the sieving assembly 100 further includes a supporting mechanism 120 for supporting the sieving mechanism 110, the supporting mechanism 120 includes two first guide rods 121, a first guide sleeve 122 fixed on the sieving 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, wherein after the first guide rods 121 and the second baffle 125 are hinged, the first guide rods 121 can rotate on a vertical plane with a hinge point of the first guide rods 121 and the second baffle 125 as a center, so that the end of the sieving mechanism 110 close to the first baffle 124 can be moved upward by cooperating with the second driving mechanism 320, i.e., the sieving mechanism 110 is tilted, an upper surface of the first baffle 124 is flush with an upper surface of the second baffle 125, and a lower surface of the first baffle 124 is flush with a lower surface of the second baffle 125, such that after the plurality of sieving mechanisms 110 are arranged together on the sieving frame 111, the plurality of sieving mechanisms 125 are connected together, the compression springs 125 can keep the sieving mechanism 110 in a state, the second baffle 123 can be pushed by the compression springs 123, and the second baffle 123 and the hopper 111 can be kept in a state that the hopper 110 is kept in which is arranged below and the hopper 110 is kept in parallel with the lower surface of the sieving mechanism 125, and the hopper 110.

As shown in fig. 2, 9 and 10, a strip-shaped vertical hole 1241 is formed in a position of the first baffle 124 corresponding to the first guide rod 121, a first slider 1242 capable of sliding vertically is slidably connected inside the strip-shaped vertical hole 1241, as shown in fig. 9 and 10, two first sliders 1242 are provided and slidably mounted on two vertical inner wall surfaces of the strip-shaped vertical hole 1241 respectively, a second guide sleeve 1243 is rotatably mounted on the first slider 1242 through a rotation rod 1244, the second guide sleeve 1243 is disposed between the two first sliders 1242, and the second guide sleeve 1243 is slidably sleeved on the first guide rod 121; can be along the vertical gliding second uide bushing 1243 of bar vertical bore 1241 through the setting to slide this second uide bushing 1243 and cup joint on first guide bar 121, thereby at the in-process of screening mechanism 110 slope, can keep first baffle 124 throughout to be straight down, and on the contrary, liftable gliding second uide bushing 1243 provides the basis for the slope of screening mechanism 110.

As shown in fig. 1, 2, 11 and 12, the screening assembly 100 is supported by a bracket assembly 200, the bracket assembly 200 includes a bottom support plate 210 horizontally disposed and four second guide rods 220 vertically disposed and fixed at four corners of the bottom support plate 210, the third guide sleeves 126 and the second guide rods 220 cooperate to provide a foundation for tilting the screening mechanism 110 and facilitate quick installation and removal of the screening mechanism 110 by a worker, each second guide rod 220 is fixedly sleeved with a fixing sleeve 230, the fixing sleeve 230 is arranged to support the third guide sleeves 126, so that the screening mechanism 110 at the bottommost position can be suspended at a certain height, the first baffle 124 and the second baffle 125 are both fixed with two third guide sleeves 126, and the third guide sleeves 126 are slidably sleeved on the second guide rods 220.

As shown in fig. 2, 7, 8, 11 and 15, the first driving mechanism 310 includes a speed reducing motor 311 mounted on the bottom support plate 210, a rotating shaft 312 disposed along the vertical direction and fixed to an output shaft of the speed reducing motor 311, driving portions 313 disposed on the rotating shaft 312 and equal in number to the screening mechanisms 110, and driven driving portions 314 disposed at the other end of the screening frame 111 and engaged with the driving portions 313, wherein the speed reducing motor 311 is used for converting electric energy into mechanical energy so as to drive the rotating shaft 312 to rotate; the driven driving part 314 includes a vertical plate 3141 fixed to the other end of the screen frame 111, and a rotation wheel 3142 rotatably installed at one end of the vertical plate 3141 remote from the screen frame 111, the rotation wheel 3142 being in rolling contact with a side surface of a driving blade 3131 to be described later, an axial length of the rotation wheel 3142 being greater than an axial length of the driving blade 3131 along the rotation wheel 3142, so that the rotation wheel 3142 can always maintain the rolling contact with the driving blade 3131 during the gradual tilting of the screen frame 111.

The active driving part 313 includes a driving blade 3131, a circular hole 3132 formed in the driving blade 3131 for the rotation shaft 312 to pass through, and a bolt 3135 for mounting the driving blade 3131 on the rotation shaft 312, a blind receiving hole 3133 is formed in a side surface of the driving blade 3131, a through hole 3134 communicating with the circular hole 3132 is formed in an inner surface of the blind receiving hole 3133 along a radial direction of the circular hole 3132, a plurality of threaded holes 3136 are formed in the rotation shaft 312, the bolt 3135 is threaded inside the threaded hole 3136 through the through hole 3134, a bolt head of the bolt 3135 is received inside the blind receiving hole 3133, the bolt head of the bolt 3135 is prevented from protruding from an edge position of the driving blade 3131, and adverse effect of the bolt head of the bolt 3135 on rolling of the rotation wheel 3142 is prevented; in the above scheme, the rolling connection between the screening frame 111 and the driving blade 3131 is realized by using the irregular shape of the driving blade 3131 and the rotating wheel 3142, so that the screening frame 111 can perform a transverse reciprocating motion, which is beneficial to uniformly spreading grains in the screening frame 111 on the screening net 112, and improving the actual screening effect.

As shown in fig. 15, the second driving mechanism 320 includes a gear 322 sleeved on the rotating shaft 312, an inner gear 321 engaged with the gear 322, and a protruding block 323 fixed on the inner gear 321, the gear 322 rotates along with the rotating shaft 312, and the inner gear 321 is much larger than the gear 322, so as to reduce the rotating speed of the rotating shaft 312, after the rotating shaft 312 rotates many times, the inner gear 321 rotates one turn, that is, after the rotating shaft 312 rotates many times, the screening mechanism 110 completes one tilting, the protruding block 323 has an arc structure, the center of the protruding block 323 is located on the axis of the inner gear 321, the top surface of the protruding block 323 is connected with the top surface of the inner gear 321 through inclined surfaces arranged at two ends thereof, the inclined surfaces are used for connecting the top surface of the protruding block 323 and the top surface of the inner gear 321, so that the first baffle plate 124 can smoothly slide to the top of the protruding block 323; the bottom of the inner gear ring 321 is provided with a bottom plate 324, a ring-shaped guide rail 325 is fixed on the upper surface of the bottom plate 324, a plurality of second sliding blocks 326 are connected on the ring-shaped guide rail 325 in a sliding manner, the second sliding blocks 326 are fixedly connected with the inner gear ring 321, a plurality of supporting legs 327 are fixed on the bottom of the bottom plate 324, the supporting legs 327 are matched with the bottom plate 324 to support the inner gear ring 321, and then the inner gear ring 321 can rotate stably under the action of the ring-shaped guide rail 325 and the second sliding blocks 326.

As shown in fig. 11, 13 and 14, a collecting assembly 400 is disposed at a position on the bottom support plate 210 directly below the screening mechanism 110, the collecting assembly 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, openings of the two storage boxes 420 are upward, and the two storage boxes 420 are sequentially arranged in a vertical direction, in practical use, the storage box 420 at the top of the collecting assembly 400 receives a falling material first, when the storage box 420 needs to be cleaned, the storage box is directly pulled out from the inside of the bottom frame 410, at this time, because there is one storage box 420, the situation that the material leaks into the bottom frame 410 does not occur, two square holes 411 are disposed 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 the limiting plate 421.

the method comprises the following steps: selecting a quantity of grain to be screened and depositing it into the topmost screening mechanism 110 of the screening assembly 100;

step two: the deceleration motor 311 is started to drive the rotation shaft 312 to rotate, on one hand, the rotation shaft 312 drives the driving blade 3131 to rotate, at this time, the elastic force of the compression spring 123 acts on the screening frame 111, so that the rotation wheel 3142 is pressed against the edge position of the driving blade 3131, and the driving blade 3131 is irregular in shape, therefore, the rotation wheel 3142 is always in contact with the edge position of the driving blade 3131 during the rotation process of the driving blade 3131, and the screening frame 111 performs a transverse reciprocating motion during the process; on the other hand, the rotating shaft 312 drives the gear 322 to rotate, the gear 322 drives the inner gear ring 321 to rotate, so that the convex blocks 323 start to rotate, when the convex blocks 323 rotate until the inclined surfaces of the convex blocks 323 contact with the bottom of the first baffle 124 at the bottommost, the convex blocks 323 enable the plurality of first baffles 124 to gradually move upwards, and at the moment, the plurality of screening frames 111 and the screening nets 112 start to incline until the convex blocks 323 are completely removed from the bottom of the first baffles 124, and the screening nets 112 return to the horizontal state, thereby realizing multi-stage screening of grains;

step three: after a certain time, the lock 1142 is opened and then the shielding plate 114 is opened, so that the grains left on each screening net 112 after screening can be discharged by the discharge port 1111 and the discharge hopper 113.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A multi-stage screening device for grain detection comprises a screening assembly (100) and a driving assembly (300), and is characterized in that the screening assembly (100) comprises a plurality of screening mechanisms (110) which are sequentially arranged along the vertical direction, each screening mechanism (110) comprises a screening net (112), and the diameters of meshes of the screening nets (112) are gradually reduced along the vertical downward direction;

the driving assembly (300) comprises a first driving mechanism (310) and a second driving mechanism (320), wherein the first driving mechanism (310) is used for driving the screening mechanism (110) to do transverse reciprocating motion, and the second driving mechanism (320) is used for driving the screening net (112) to incline.

2. The multi-stage screening device for detecting grains according to claim 1, wherein the screening mechanism (110) further comprises a screening frame (111) fixed on the top surface of the screening net (112), one end of the screening frame (111) is provided with a discharging component, the discharging component comprises a discharging port (1111) arranged on one end surface of the screening frame (111), a shielding plate (114) arranged at one end of the screening frame (111) and used for opening and closing the discharging port (1111), and a discharging hopper (113), one end of the shielding plate (114) is hinged with the screening frame (111) through a hinge (1141), the other end of the shielding plate is fastened with the screening frame (111) through a latch (1142), and the discharging hopper (113) is used for receiving materials discharged through the discharging port (1111).

3. The multistage screening apparatus for detecting grains according to claim 2, wherein the screening assembly (100) further comprises a supporting mechanism (120) for supporting the screening mechanism (110), the supporting mechanism (120) comprises 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 plate (125) hinged at one end of the two first guide rods (121), and a first baffle plate (124) arranged at the other end of the two first guide rods (121), an upper surface of the first baffle plate (124) is flush with an upper surface of the second baffle plate (125), a lower surface of the first baffle plate (124) is flush with a lower surface of the second baffle plate (125), the compression springs (123) are connected between the first guide sleeve (122) and the second baffle plate (125), and a notch (1251) for the discharge hopper (113) to pass through is formed on the second baffle plate (125).

4. The multi-stage screening device for grain detection according to claim 3, wherein a strip-shaped vertical hole (1241) is formed in the first baffle (124) at a position corresponding to the first guide rod (121), a first sliding block (1242) capable of vertically sliding is connected to the inside of the strip-shaped vertical hole (1241) in a sliding manner, a second guide sleeve (1243) is rotatably mounted on the first sliding block (1242) through a rotating rod (1244), and the second guide sleeve (1243) is slidably sleeved on the first guide rod (121).

5. The multistage screening device for grain inspection according to claim 4, wherein the screening assembly (100) is supported by a bracket assembly (200), the bracket assembly (200) comprises a horizontally arranged bottom support plate (210) and four second guide rods (220) which are fixed at four corner positions of the bottom support plate (210) and vertically arranged, each second guide rod (220) is fixedly sleeved with a fixed sleeve (230), two third guide sleeves (126) are fixed on the first baffle plate (124) and the second baffle plate (125), and the third guide sleeves (126) are slidably sleeved on the second guide rods (220).

6. The multi-stage screening device for grain detection according to claim 5, wherein the first driving mechanism (310) comprises a speed reduction motor (311) mounted on the bottom support plate (210), a rotating shaft (312) arranged along the vertical direction and fixedly connected with an output shaft of the speed reduction motor (311), driving parts (313) arranged on the rotating shaft (312) and equal in number to the screening mechanisms (110), and driven driving parts (314) arranged at the other end of the screening frame (111) and matched with the driving parts (313); the driven driving part (314) comprises a vertical plate (3141) fixed at the other end of the screening frame (111) and a rotating wheel (3142) rotatably installed at one end of the vertical plate (3141) far away from the screening frame (111).

7. The multistage sifter for grain inspection according to claim 6, wherein the active driving part (313) comprises a driving blade (3131), a circular hole (3132) formed in the driving blade (3131) for the rotation shaft (312) to pass through, and a bolt (3135) for mounting the driving blade (3131) to the rotation shaft (312), wherein a blind receiving hole (3133) is formed in a side surface of the driving blade (3131), a through hole (3134) communicating with the circular hole (3132) is formed in an inner surface of the blind receiving hole (3133) along a radial direction of the circular hole (3132), a plurality of threaded holes (3136) are formed in the rotation shaft (312) and are equidistantly arranged, the bolt (3135) is threaded inside the threaded hole (3136) through the through hole (3134), a bolt head of the bolt (3135) is received inside the blind receiving hole (3133), and the rotation wheel (3142) is in rolling contact with the side surface of the driving blade (3131).

8. The multistage sifter for grain inspection according to claim 7, wherein the second driving mechanism (320) comprises a gear (322) sleeved on the rotating shaft (312), an inner gear ring (321) engaged with the gear (322), and a convex block (323) fixed on the inner gear ring (321), the convex block (323) is in an arc structure, the center of the convex block (323) is located on the axis of the inner gear ring (321), and the top surface of the convex block (323) is connected with the top surface of the inner gear ring (321) through inclined surfaces arranged at both ends of the convex block; a bottom plate (324) is arranged at the bottom of the inner gear ring (321), an annular guide rail (325) is fixed on the upper surface of the bottom plate (324), a plurality of second sliding blocks (326) are connected on the annular guide rail (325) in a sliding manner, the second sliding blocks (326) are fixedly connected with the inner gear ring (321), and a plurality of supporting legs (327) are fixed at the bottom of the bottom plate (324).

9. The multistage screening device for detecting grains according to claim 8, wherein a collection assembly (400) is arranged on the bottom support plate (210) at a position right below the screening mechanism (110), the collection assembly (400) comprises a bottom frame (410) fixedly connected with the bottom support plate (210) and two storage boxes (420) slidably connected with the bottom frame (410), the openings of the two storage boxes (420) face upwards, the two storage boxes (420) are sequentially arranged in the vertical direction, two square holes (411) are formed in one side of each storage box (420), and one end of each storage box (420) penetrates through the square holes (411) and is fixedly connected with a limiting plate (421).

10. The use method of the multi-stage screening device for grain inspection according to any one of claims 1 to 9, comprising the steps of:

the method comprises the following steps: selecting a quantity of grain to be screened and feeding it into a topmost screening mechanism (110) of the screening assembly (100);

step two: starting a speed reduction motor (311) to drive a rotating shaft (312) to rotate, wherein on one hand, the rotation of the rotating shaft (312) can drive a driving blade (3131) to rotate, and at the moment, the elastic force of a compression spring (123) acts on the screening frame (111) to enable a rotating wheel (3142) to be pressed on the edge position of the driving blade (3131), and the driving blade (3131) is in an irregular shape, so that the rotating wheel (3142) can be always in contact with the edge position of the driving blade (3131) in the rotating process of the driving blade (3131), and the screening frame (111) can perform transverse reciprocating motion in the process; on the other hand, the rotating shaft (312) can drive the gear (322) to rotate, the gear (322) can drive the inner gear ring (321) to rotate, so that the convex blocks (323) start to rotate, when the inclined surfaces of the convex blocks (323) are contacted with the bottom of the first baffle plate (124) at the bottommost part, the convex blocks (323) can enable the plurality of first baffle plates (124) to start to gradually move upwards, the plurality of screening frames (111) and the screening nets (112) start to incline at the moment until the convex blocks (323) are completely removed from the bottom of the first baffle plate (124), and the screening nets (112) return to the horizontal state, so that multi-stage screening of grains is realized;

step three: after a certain time, the lock catch (1142) is opened, and then the baffle plate (114) is opened, so that the grains left on each screening net (112) after screening can be discharged by using the discharge hole (1111) and the discharge hopper (113).