CN111842158B

CN111842158B - Automatic screening machine for grain and cereal

Info

Publication number: CN111842158B
Application number: CN202010800338.0A
Authority: CN
Inventors: 徐亚洁
Original assignee: Tongwei Lebaiwei Food Co ltd
Current assignee: TONGWEI LEBAIWEI FOOD CO.,LTD.
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2022-01-21
Anticipated expiration: 2040-08-11
Also published as: CN111842158A

Abstract

The invention relates to the technical field of grain processing equipment, in particular to an automatic screening machine for grain, which comprises: the device comprises a machine body, wherein a discharge hopper with an upward wide opening is arranged on one side of the bottom end in the machine body, an impurity box for collecting impurities is arranged on one side of the discharge hopper, and a negative pressure opening communicated with the working end of negative pressure equipment is arranged on one side of the machine body, which is positioned at the top end of the discharge hopper; the inclined screw conveyor is arranged on one side of the machine body, and a top discharge end is communicated with the top end in the machine body through a material scattering device; the grain screening machine comprises a first screening plate and a second screening plate, wherein the screening plates are horizontally arranged at the top end of the inner part of the machine body through a vibration mounting frame in a V-shaped opening manner, the meshes of the first screening plate are larger than those of the second screening plate, and the meshes of the first screening plate and the second screening plate are larger than the grain diameter; the impurity turner is horizontally arranged at the bottommost ends of the first sieve plate and the second sieve plate; the wide opening of the reciprocating blanking hopper is vertically arranged in the machine body towards the bottom end of the second sieve plate; the pipeline of blowing sets up inside the organism, and this equipment can effectively screen and winnowing grain.

Description

Automatic screening machine for grain and cereal

Technical Field

The invention relates to the technical field of grain processing equipment, in particular to an automatic screening machine for grains.

Background

China is the main producing country of grains such as rice, wheat and the like, and the harvested grains often generate heat due to moisture. Fermentation, mildew, germination and the like can be processed or transported only after being aired or dried, and on the other hand, along with the vigorous popularization and use of large-scale harvesters, the harvested grains are mixed with a large amount of dust, straws and wheat bran, and the harvested grains need to be sieved to be aired or dried.

Chinese patent CN201710232261.X discloses grain screening agricultural machinery equipment and a working method thereof, wherein the grain screening agricultural machinery equipment comprises a grain containing chamber, a screening hopper, a screening bin, an air suction channel, an upper air blowing device and a blanking channel; the grain containing chamber and the screening hopper are arranged in an integrated manner in the upper and lower directions, a screening plate is arranged on a connecting interface of the grain containing chamber and the screening hopper, an elastic reset device is arranged on the outer wall of the screening hopper, a grain outlet is arranged at the bottom of the screening hopper, an upper blowing device is arranged right below the grain outlet of the screening hopper, and a blanking channel is formed by the conical outer wall of the upper blowing device and the inner wall of the lower section of the screening bin; a plurality of air suction channels which are symmetrically arranged are communicated and arranged on the upper section wall surface of the screening bin; the bottom of the grain containing chamber is symmetrically provided with a plurality of vertical vibrating devices.

When the equipment is used for screening grains, light impurities are not easy to remove through winnowing in the vertical direction, and large impurities can fall onto the conveying device along with the grains.

Disclosure of Invention

In order to solve the technical problem, the automatic screening machine for the grains is provided, and the technical scheme solves the problem that dust, straws and wheat bran in newly harvested grains need to be removed.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

an automatic screening machine for grain, comprising: the device comprises a machine body, wherein a discharge hopper with an upward wide opening is arranged on one side of the bottom end in the machine body, an impurity box for collecting impurities is arranged on one side of the discharge hopper, and a negative pressure opening communicated with the working end of negative pressure equipment is arranged on one side of the machine body, which is positioned at the top end of the discharge hopper; the inclined screw conveyor is arranged on one side of the machine body, a top discharge end of the inclined screw conveyor is communicated with the top end of the interior of the machine body through the material scattering device, and grains at the discharge end of the inclined screw conveyor are scattered uniformly in the machine body through the working end of the material scattering device in a working state; the first sieve plate and the second sieve plate are horizontally arranged at the top end of the inside of the machine body in a V-shaped opening mode through the vibration mounting frame, the first sieve plate is located at the top end of the second sieve plate, the mesh of the first sieve plate is larger than that of the second sieve plate, the mesh of the first sieve plate and that of the second sieve plate are both larger than the grain diameter, and in a working state, the working end of the vibration mounting frame drives the first sieve plate and the second sieve plate to vibrate up and down; the impurity turner is horizontally arranged at the bottommost ends of the first sieve plate and the second sieve plate, and in a working state, the working end of the impurity turner is rotated to enable the impurities at the bottom ends of the top surfaces of the first sieve plate and the second sieve plate to be discharged outwards from the inside of the machine body; the wide opening of the reciprocating blanking hopper is vertically arranged in the machine body towards the bottom end of the second sieve plate, and the reciprocating blanking hopper slides in a reciprocating manner along the horizontal direction to enable grains in the reciprocating blanking hopper to fall in a curtain shape in a working state; and the output end of the blowing pipeline is perpendicular to the discharge end of the reciprocating blanking hopper and horizontally faces the negative pressure port and is arranged inside the machine body.

Preferably, the first sieve plate upper surface is provided with the spout of being convenient for impurity slip its bottom along its incline direction equidistant, and second sieve plate upper surface is provided with the spout of spout isokinetic.

Preferably, the vibration mount comprises: the upper support and the lower support are horizontally arranged on opposite sides inside the machine body side by side, and two ends of the supports are fixedly connected through fixing columns; a lifting plate vertically matched with the fixing column in a sliding manner is arranged on one side of the fixed side plate, and the first sieve plate and the second sieve plate are horizontally arranged between the fixed side plates on the two sides in a V shape; the spring is coaxially sleeved on the fixed column, two ends of the first spring are respectively abutted to the bottom end of the upper support and the top end of the lifting plate, and two ends of the second spring are respectively abutted to the top end of the lower support and the bottom end of the lifting plate; and the working end of the vibration motor vertically penetrates through the side surface of the machine body upwards through the vibration motor and is fixedly connected with the lifting plate.

Preferably, the impurity inverter includes: the fixed plates are horizontally arranged on two sides outside the machine body, are positioned on the outer sides of the bottom ends of the first sieve plate and the second sieve plate and are horizontal to the first sieve plate and the second sieve plate, and are provided with sliding grooves at intervals along the horizontal direction; dwang, both ends are passed through the damping and are rotated the horizontal rotation of seat and set up on the fixed plate, be provided with along the axis equidistant with sliding tray sliding fit's the pole that turns over on the dwang, turn over the pole with sieve bottom toothing clearance fit.

Preferably, the reciprocating blanking hopper comprises: the wide opening of the hopper vertically faces the second sieve plate, and two sides of the hopper are horizontally arranged in the machine body in a sliding manner through guide rails; the length of the first connecting rod is greater than that of the second connecting rod, and two ends of the first connecting rod are respectively rotatably connected with the other side of the hopper and one end of the second connecting rod; and an output shaft of the first servo motor is coaxially and fixedly connected with the other end of the second connecting rod, and the first servo motor is started to enable the hopper to slide on the guide rail in a working state.

Preferably, the blowing pipe includes: the output ends of the air blowing nozzles are horizontally arranged in the machine body at equal intervals towards the negative pressure port; the output end of the main air pipe is communicated with the input end of the blowing nozzle, and the input end of the main air pipe is communicated with the output end of the air pump through a communicating pipe.

Preferably, the bulk cargo ware includes: the output shaft of the second servo motor penetrates through the discharge hole of the inclined screw conveyor and the hopper at the top end of the machine body; the fixed roller is coaxially and fixedly connected with the output shaft of the second servo motor, and stirring rods used for rotating and dispersing grains are uniformly distributed at the bottom end of the fixed roller along the axis.

Preferably, the machine body is also internally provided with a receiving hopper with a wide opening facing upwards, and the receiving hopper is positioned between the second sieve plate and the reciprocating blanking hopper.

Preferably, the bottom end of the machine body is also provided with a horizontal spiral feeder, and the discharge hopper is communicated with a feed inlet of the horizontal spiral feeder.

Preferably, the narrow opening of the hopper is provided with the diversion columns which are perpendicular to the inner side of the narrow opening of the hopper at equal intervals along the sliding direction of the narrow opening of the hopper.

Compared with the prior art, the invention has the beneficial effects that:

1. the large impurities in the grains are screened out through the first sieve plate, the second sieve plate and the vibration mounting frame, and specifically, the inclined screw conveyor, the second servo motor, the vibration motor, the first servo motor and the air pump communicated with the communicating pipe are started in advance, so that the screening machine is in a working state; grain is put into a feeding port at the bottom end of the inclined screw conveyor and is conveyed to the top end of the machine body, the whole machine body is high, the material is inconvenient to pour from the top end, the grain is poured into the feeding port at the bottom end of the inclined screw conveyor, so that the inclined screw conveyor automatically conveys the grain to the top end of the machine body, and the screening and discharging speed of the grain can be controlled by controlling the feeding speed of the inclined screw conveyor; the fixed roller drives the stirring rod to rotate at the top end of the machine body, grains at the discharge end of the inclined screw conveyor fall under the action of gravity, and the working end of the bulk cargo device spreads the grains uniformly on the top surface of the first sieve plate in the falling process of the grains, so that the grains are not easy to accumulate into clusters and directly fall on the first sieve plate, and screening is facilitated; the first sieve plate and the second sieve plate are horizontally arranged in a V-shaped opening, the sieve mesh of the first sieve plate is larger than that of the second sieve plate, and the sieve meshes of the first sieve plate and the second sieve plate are both larger than the grain diameter, so that grains can pass through the first sieve plate and the second sieve plate, large impurities such as straws are stopped on the top surface of the first sieve plate, and the straws slide to the bottom end under the action of the inclined surface of the first sieve plate; larger impurities pass through the first sieve plate and fall on the top surface of the second sieve plate, the larger impurities slide to the bottom end under the action of the inclined surface of the second sieve plate, and the vibration action of the vibration motor is transmitted to the first sieve plate and the second sieve plate through the connecting plate, so that grains pass through the drying plate at an accelerated speed; when impurities at the bottom end of the top surface of the sieve plate are accumulated to a certain degree, the adjacent side rotating rod is rotated, and then the impurities can be discharged from the interior of the machine body outwards through the turning rod;

2. the invention removes small impurities in grains through the reciprocating blanking hopper and the air blowing pipeline, particularly, the grains which are primarily screened still have dust and wheat bran with light weight, when the grains fall into the hopper which moves in a reciprocating manner, the grains fall in a curtain shape under the reciprocating action of the hopper, the air curtain which is sprayed out by the air blowing nozzle blows the light dust and the wheat bran in the grains to the negative pressure port, the residual impurities and the grains fall into the impurity box in different parabolas, and the grains which are completely screened are discharged outwards through the discharging hopper, thereby completing the screening operation.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a perspective cross-sectional view at section A-A of FIG. 2;

fig. 4 is a perspective view of a first screen deck and a second screen deck of the present invention;

FIG. 5 is a partial enlarged view of FIG. 4 at B;

FIG. 6 is an enlarged view of a portion of FIG. 4 at C;

FIG. 7 is an enlarged view of a portion of FIG. 4 at D;

FIG. 8 is a perspective view of a reciprocating drop hopper of the present invention;

FIG. 9 is a perspective view of the blow line of the present invention;

fig. 10 is a perspective view of the dispenser of the present invention.

Description of reference numerals:

1-body; 1 a-a discharge hopper; 1 b-an impurity box; 1 c-a negative pressure port; 1 d-a receiving hopper; 1 e-a horizontal screw feeder;

2-inclined screw conveyor;

3-a material scattering device; 3 a-a second servo motor; 3 b-a fixed roller; 3b 1-stirring bar;

4-a first screen deck; 4 a-a chute;

5-a second sieve plate;

6-vibrating the mounting rack; 6 a-upper support; 6 b-lower support; 6 c-fixed column; 6 d-fixing the side plate; 6d 1-lifter plate; 6 e-a first spring; 6 f-a second spring; 6 g-vibration motor; 6 h-connecting plate;

7-an impurity turner; 7 a-a fixed plate; 7a 1-sliding groove; 7 b-rotating rods; 7b 1-toggle bar; 7 c-a damping rotating seat;

8-reciprocating blanking hopper; 8 a-a hopper; 8a 1-split column; 8 b-a guide rail; 8 c-a first link; 8 d-a second link; 8 e-a first servo motor;

9-blowing pipeline; 9 a-a blowing nozzle; 9 b-a main air pipe; 9 c-communicating tube.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

Referring to fig. 3, an automatic screening machine for grain includes:

the device comprises a machine body 1, wherein a discharge hopper 1a with an upward wide opening is arranged on one side of the bottom end in the machine body 1, an impurity box 1b for collecting impurities is arranged on one side of the discharge hopper 1a, and a negative pressure opening 1c communicated with the working end of negative pressure equipment is arranged on one side of the machine body 1, which is positioned at the top end of the discharge hopper 1 a;

the inclined screw conveyor 2 is arranged on one side of the machine body 1, a top discharge end of the inclined screw conveyor 2 is communicated with the top end of the interior of the machine body 1 through the material scattering device 3, and grains at the discharge end of the inclined screw conveyor 2 are uniformly scattered in the machine body 1 through the working end of the material scattering device 3 in a working state;

the grain screening machine comprises a first screening plate 4 and a second screening plate 5, wherein the first screening plate 4 and the second screening plate 5 are horizontally arranged at the top end in the machine body 1 in a V-shaped opening mode through a vibration mounting frame 6, the first screening plate 4 is positioned at the top end of the second screening plate 5, the meshes of the first screening plate 4 are larger than those of the second screening plate 5, the meshes of the first screening plate 4 and the meshes of the second screening plate 5 are larger than grain diameters, and in a working state, the working end of the vibration mounting frame 6 drives the first screening plate 4 and the second screening plate 5 to vibrate up and down;

the impurity turner 7 is horizontally arranged at the bottommost ends of the first sieve plate 4 and the second sieve plate 5, and in a working state, the working end of the impurity turner 7 is rotated to enable the impurities at the bottom ends of the top surfaces of the first sieve plate 4 and the second sieve plate 5 to be discharged outwards from the inside of the machine body 1;

the reciprocating blanking hopper 8 is provided with a wide opening vertically facing the bottom end of the second sieve plate 5 and is arranged in the machine body 1, and in a working state, the reciprocating blanking hopper 8 slides in a reciprocating manner along the horizontal direction to enable grains in the reciprocating blanking hopper to fall in a curtain shape;

and the output end of the blowing pipeline 9 is vertical to the discharge end of the reciprocating blanking hopper 8 and is horizontally arranged in the machine body 1 towards the negative pressure port 1 c.

The inclined screw conveyor 2, the bulk cargo device 3, the vibration mounting frame 6, the reciprocating blanking hopper 8 and the blowing pipeline 9 are started in advance; the whole machine body 1 is high, so that the material is inconvenient to pour from the top end, the inclined spiral conveyor 2 is arranged on one side of the machine body 1, the inclined spiral conveyor 2 automatically transports grains to the top end of the machine body 1 by pouring the grains into a feeding port at the bottom end of the inclined spiral conveyor 2, and the screening and discharging speed of the grains can be controlled by controlling the feeding speed of the inclined spiral conveyor 2; at the top end of the machine body 1, the grain at the discharge end of the inclined screw conveyor 2 falls under the action of gravity, and the working end of the bulk spreader 3 uniformly spreads the grain on the top surface of the first sieve plate 4 in the falling process of the grain, so that the grain is not easy to accumulate into clusters and directly falls on the first sieve plate 4, and screening is facilitated; the first sieve plate 4 and the second sieve plate 5 are horizontally arranged in a V-shaped opening, the meshes of the first sieve plate 4 are larger than those of the second sieve plate 5, and the meshes of the first sieve plate 4 and the second sieve plate 5 are larger than the grain diameter, so that grains can pass through the first sieve plate 4 and the second sieve plate 5, large impurities such as straws are stopped on the top surface of the first sieve plate 4, and the straws slide down to the bottom end under the inclined surface action of the first sieve plate 4; the larger impurities pass through the first sieve plate 4 and fall on the top surface of the second sieve plate 5, and the larger impurities slide down to the bottom end under the action of the inclined surface of the second sieve plate 5; the vibration effect of the working end of the vibration mounting frame 6 accelerates grains to pass through the first sieve plate 4 and the second sieve plate 5, and prevents the grains from being accumulated on the top surface of the sieve plates; when impurities at the bottom end of the top surface of the sieve plate are accumulated to a certain degree, the working end of the impurity turner 7 at the adjacent side is rotated, so that the impurities can be discharged from the interior of the machine body 1 to the outside, and grains can be prevented from leaking outside; the grain that passes through preliminary screening still has dust and the wheat bran that the quality is lighter, and when its whereabouts to reciprocating motion's reciprocal blanking fill 8 in, grain is curtain whereabouts through reciprocal effect of reciprocal blanking fill 8, blows to negative pressure mouth 1c through 9 blowout air curtains of blowing pipe way with lighter dust and wheat bran in the grain, and during remaining impurity was different parabolas with grain and falls to impurity case 1b, and the grain that screens completely outwards discharges via play hopper 1a to accomplish the screening operation.

As shown in fig. 6, the upper surface of the first screen deck 4 is provided with sliding grooves 4a at equal intervals along the inclined direction thereof for facilitating the sliding of the impurities at the bottom ends thereof, and the upper surface of the second screen deck 5 is provided with sliding grooves having the same function as the sliding grooves 4 a.

When the grains fall onto the first sieve plate 4 and the second sieve plate 5, the sliding grooves 4a and the sliding grooves on the second sieve plate 5 help the impurities with larger volume to slide down to the sunburn lower end, so that the impurities are collected and discharged conveniently.

As shown in fig. 5, the vibration mount 6 includes: the upper bracket 6a and the lower bracket 6b are horizontally arranged on opposite sides in the machine body 1 side by side, and two ends of the brackets are fixedly connected through a fixing column 6 c;

a lifting plate 6d1 vertically matched with the fixed column 6c in a sliding manner is arranged on one side of the fixed side plate 6d, and the first sieve plate 4 and the second sieve plate 5 are horizontally arranged between the fixed side plates 6d on the two sides in a V shape;

the first spring 6e and the second spring 6f are coaxially sleeved on the fixed column 6c, two ends of the first spring 6e are respectively abutted to the bottom end of the upper bracket 6a and the top end of the lifting plate 6d1, and two ends of the second spring 6f are respectively abutted to the top end of the lower bracket 6b and the bottom end of the lifting plate 6d 1;

the working end of the vibrating motor 6g vertically upwards penetrates through the side face of the machine body 1 through the vibrating motor 6g horizontally and is fixedly connected with the lifting plate 6d 1.

When grain falls down to first sieve 4 and second sieve 5 on, vibrating motor 6g work end drives 6h and lifter plate 6d1 and vibrates on fixed column 6c, makes grain accelerate through first sieve 4 and second sieve 5 through the fixed curb plate 6d of vibration, and impurity falls in first sieve 4 and second sieve 5 upper surface, and first spring 6e both ends butt respectively at upper bracket 6a bottom and lifter plate 6d1 top, second spring 6f both ends butt respectively at lower bracket 6b top and lifter plate 6d1 bottom, thereby make the spring can stably drive fixed curb plate 6d vibration from top to bottom to make the vibration more stable.

As shown in fig. 6 and 7, the foreign matter inverter 7 includes: the fixed plates 7a are horizontally arranged on two outer sides of the machine body 1, the fixed plates 7a are positioned on the outer sides of the bottom ends of the first sieve plate 4 and the second sieve plate 5 and are horizontal to the bottom ends of the first sieve plate and the second sieve plate, and sliding grooves 7a1 are arranged on the fixed plates 7a at intervals along the horizontal direction;

dwang 7b, both ends are passed through the damping and are rotated seat 7c horizontal rotation and set up on fixed plate 7a, be provided with along the axis equidistant turning rod 7b1 with sliding tray 7a1 sliding fit on the dwang 7b, turning rod 7b1 with sieve bottom toothing clearance fit.

When the impurity of great volume slips to its low side at first sieve 4 and second sieve 5 upper surface, falls simultaneously on turning over pole 7b1, rotating dwang 7b towards the organism 1 outside for turning over pole 7b1 and passing sliding tray 7a1 will impurity is taken out on the sieve low-end, thereby be convenient for in time clean, and dwang 7b rotates the setting on fixed plate 7a through damping rotation seat 7c, makes under not having sufficient exogenic action, the rotation can not take place for coaxial line turns over pole 7b1 separation sliding tray 7a1 and prevents that the inside grain of organism 1 from leaking outward.

As shown in fig. 8, the reciprocating drop hopper 8 includes: the wide opening of the hopper 8a vertically faces the second sieve plate 5, and two sides of the hopper are horizontally arranged in the machine body 1 in a sliding manner through guide rails 8 b;

the length of the first connecting rod 8c is larger than that of the second connecting rod 8d, and two ends of the first connecting rod 8c are respectively rotatably connected with the other side of the hopper 8a and one end of the second connecting rod 8 d;

and an output shaft of the first servo motor 8e is coaxially and fixedly connected with the other end of the second connecting rod 8d, and the first servo motor 8e is started to enable the hopper 8a to slide on the guide rail 8b in a working state.

When the impurity of great volume in the grain gets rid of and descends again, grain falls to in the hopper 8a, and first servo motor 8e output shaft drives second connecting rod 8d and rotates, and first connecting rod 8c length is greater than second connecting rod 8d to make first connecting rod 8c one end drive hopper 8a reciprocating motion on guide rail 8b, thereby make grain be the curtain whereabouts, thereby the selection by winnowing of being convenient for.

As shown in fig. 9, the blowing pipe 9 includes: the output ends of the air blowing nozzles 9a are horizontally arranged in the machine body 1 at equal intervals towards the negative pressure port 1 c;

and the output end of the main air pipe 9b is communicated with the input end of the blowing nozzle 9a, and the input end of the main air pipe 9b is communicated with the output end of the air pump through a communicating pipe 9 c.

The air pump is started, the output end of the air pump injects air into the main air pipe 9b through the communicating pipe 9c, so that the air is released through the blowing nozzle 9a to remove light impurities in the grains, and the impurities are absorbed by the negative pressure port 1 c.

As shown in fig. 10, the bulk feeder 3 includes: an output shaft of the second servo motor 3a penetrates through a discharge hole of the inclined screw conveyor 2 and a hopper at the top end of the machine body 1;

and the fixed roller 3b is coaxially and fixedly connected with an output shaft of the second servo motor 3a, and stirring rods 3b1 used for rotating and dispersing grains are uniformly distributed at the bottom end of the fixed roller 3b along the axis.

The second servo motor 3a is started to drive the output shaft of the second servo motor to drive the fixed roller 3b to rotate coaxially, so that the rotating fixed roller 3b can uniformly disperse grains falling from the discharge end of the inclined screw conveyor 2 into the machine body 1, and screening is facilitated.

As shown in fig. 3, a receiving hopper 1d with a wide opening facing upwards is further arranged inside the machine body 1, and the receiving hopper 1d is positioned between the second sieve plate 5 and the reciprocating blanking hopper 8.

The grain that receives the hopper 1d and collects after the screening of second sieve 5 puts into it again and by its supplementary selection by winnowing to reciprocating blanking fill 8 to prevent that grain can't concentrate and fall in reciprocating blanking fill 8.

As shown in fig. 3, a horizontal screw feeder 1e is further provided at the bottom end of the machine body 1, and the discharge hopper 1a is communicated with the feed inlet of the horizontal screw feeder 1 e.

The horizontal screw feeder 1e is convenient for the worker to collect the grain at the discharge hopper 1 a.

As shown in fig. 8, in the narrow opening of the hopper 8a, flow distribution columns 8a1 perpendicular to the inner side thereof are provided at equal intervals in the sliding direction thereof.

The splitter 8a1 allows the grain to be evenly sprinkled in the hopper 8a for air separation when the hopper 8a reciprocates.

The device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:

the method comprises the following steps: the inclined screw conveyor 2, the second servo motor 3a, the vibrating motor 6g, the first servo motor 8e and an air pump communicated with the communicating pipe 9c are started in advance, so that the screening machine is in a working state;

step two: grain is put into a feeding port at the bottom end of the inclined screw conveyor 2 and is conveyed to the top end of the machine body 1 by the inclined screw conveyor 2, the whole machine body 1 is high, the material is inconvenient to pour from the top end, the inclined screw conveyor 2 automatically conveys the grain to the top end of the machine body 1 by pouring the grain into the feeding port at the bottom end of the inclined screw conveyor 2, and the screening and discharging speed of the grain can be controlled by controlling the feeding speed of the inclined screw conveyor 2;

step three: the fixed roller 3b drives the stirring rod 3b1 to rotate at the top end of the machine body 1, grains at the discharge end of the inclined screw conveyor 2 fall under the action of gravity, and the working end of the bulk spreader 3 spreads the grains uniformly on the top surface of the first sieve plate 4 in the falling process of the grains, so that the grains are not easy to accumulate into clusters and directly fall on the first sieve plate 4, and screening is facilitated;

step four: the first sieve plate 4 and the second sieve plate 5 are horizontally arranged in a V-shaped opening, the meshes of the first sieve plate 4 are larger than those of the second sieve plate 5, and the meshes of the first sieve plate 4 and the second sieve plate 5 are larger than the grain diameter, so that grains can pass through the first sieve plate 4 and the second sieve plate 5, large impurities such as straws are stopped on the top surface of the first sieve plate 4, and the straws slide down to the bottom end under the inclined surface action of the first sieve plate 4; larger impurities pass through the first sieve plate 4 and fall on the top surface of the second sieve plate 5, the larger impurities slide to the bottom end under the action of the inclined surface of the second sieve plate 5, and the vibration action of the vibration motor 6g is transmitted to the first sieve plate 4 and the second sieve plate 5 through the connecting plate 6h, so that grains can pass through the drying plate at an accelerated speed;

step five: when impurities at the bottom end of the top surface of the sieve plate are accumulated to a certain degree, the rotating rod 7b at the adjacent side is rotated, and then the impurities can be discharged outwards from the inside of the machine body 1 through the turning rod 7b 1;

step six: the grain that passes through preliminary screening still has dust and the wheat bran that the quality is lighter, and when it falls to reciprocating motion's hopper 8a in, grain is curtain whereabouts through hopper 8a reciprocating action, blows to negative pressure mouth 1c through blowing nozzle 9a blowout air curtain with lighter dust and wheat bran in the grain, and during remaining impurity was different parabolas with grain and falls to impurity box 1b, and the grain that screens completely outwards discharges through going out hopper 1a to accomplish the screening operation.

The foregoing has described the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a grain cereal automatic screening machine which characterized in that, including:

the device comprises a machine body (1), wherein a discharge hopper (1 a) with an upward wide opening is arranged on one side of the inner bottom end of the machine body (1), an impurity box (1 b) for collecting impurities is arranged on one side of the discharge hopper (1 a), and a negative pressure opening (1 c) communicated with the working end of negative pressure equipment is arranged on one side of the machine body (1) positioned at the top end of the discharge hopper (1 a);

the inclined screw conveyor (2) is arranged on one side of the machine body (1), a top discharge end of the inclined screw conveyor is communicated with the top end of the interior of the machine body (1) through the material scattering device (3), and grains at the discharge end of the inclined screw conveyor (2) are uniformly scattered and fall into the interior of the machine body (1) through the working end of the material scattering device (3) in a working state;

the grain screening machine comprises a first screening plate (4) and a second screening plate (5), wherein the first screening plate (4) and the second screening plate (5) are arranged at the top end inside a machine body (1) in a V-shaped opening horizontal mode through a vibration mounting frame (6), the first screening plate (4) is located at the top end of the second screening plate (5), the meshes of the first screening plate (4) are larger than those of the second screening plate (5), the meshes of the first screening plate (4) and the meshes of the second screening plate (5) are both larger than grain diameters, and in a working state, the working end of the vibration mounting frame (6) drives the first screening plate (4) and the second screening plate (5) to vibrate up and down;

the impurity turner (7) is horizontally arranged at the bottommost ends of the first sieve plate (4) and the second sieve plate (5), and in a working state, the working end of the impurity turner (7) is rotated to enable impurities at the bottom ends of the top surfaces of the first sieve plate (4) and the second sieve plate (5) to be discharged outwards from the inside of the machine body (1);

the wide opening of the reciprocating blanking hopper (8) is vertically arranged in the machine body (1) towards the bottom end of the second sieve plate (5), and the reciprocating blanking hopper (8) slides in a reciprocating manner along the horizontal direction to enable grains in the reciprocating blanking hopper to fall in a curtain shape in a working state;

the output end of the blowing pipeline (9) is vertical to the discharge end of the reciprocating blanking hopper (8) and is arranged in the machine body (1) towards the negative pressure port (1 c) horizontally,

the vibration mounting frame (6) comprises: the device comprises an upper support (6 a) and a lower support (6 b), wherein the upper support (6 a) and the lower support (6 b) are horizontally arranged on opposite sides in the machine body (1) side by side, and two ends of the upper support (6 a) and two ends of the lower support (6 b) are fixedly connected through a fixing column (6 c);

the lifting plate (6 d 1) which is vertically matched with the fixed column (6 c) in a sliding manner is arranged on one side of the fixed side plate (6 d), and the first sieve plate (4) and the second sieve plate (5) are horizontally arranged between the fixed side plates (6 d) on the two sides in a V shape;

the first spring (6 e) and the second spring (6 f) are coaxially sleeved on the fixing column (6 c), two ends of the first spring (6 e) are respectively abutted to the bottom end of the upper bracket (6 a) and the top end of the lifting plate (6 d 1), two ends of the second spring (6 f) are respectively abutted to the top end of the lower bracket (6 b) and the bottom end of the lifting plate (6 d 1);

the working end of the vibrating motor (6 g) drives the connecting plate (6 h) to vibrate, the connecting plate (6 h) is fixedly connected with the lifting plate (6 d 1), and the vibrating motor (6 g) horizontally penetrates through the machine body (1);

impurity turner (7) including: the fixed plates (7 a) are horizontally arranged on two outer sides of the machine body (1), the fixed plates (7 a) are positioned on the outer sides of the bottom ends of the first sieve plate (4) and the second sieve plate (5) and are horizontal to the first sieve plate and the second sieve plate, and sliding grooves (7 a 1) are arranged on the fixed plates (7 a) at intervals along the horizontal direction;

the two ends of the rotating rod (7 b) are horizontally rotated and arranged on the fixed plate (7 a) through the damping rotating seat (7 c), the rotating rod (7 b) is provided with a turning rod (7 b 1) which is in sliding fit with the sliding groove (7 a 1) at equal intervals along the axis, the turning rod (7 b 1) is in tooth joint clearance fit with the bottom ends of the first sieve plate (4) and the second sieve plate (5),

the reciprocating blanking hopper (8) comprises: the wide opening of the hopper (8 a) vertically faces the second sieve plate (5), and two sides of the hopper are horizontally arranged in the machine body (1) in a sliding mode through guide rails (8 b);

the hopper is characterized by comprising a first connecting rod (8 c) and a second connecting rod (8 d), wherein the length of the first connecting rod (8 c) is larger than that of the second connecting rod (8 d), and two ends of the first connecting rod (8 c) are respectively in rotating connection with the other side of the hopper (8 a) and one end of the second connecting rod (8 d);

a first servo motor (8 e), the output shaft of which is coaxially and fixedly connected with the other end of the second connecting rod (8 d), and under the working state, the first servo motor (8 e) is started to enable the hopper (8 a) to slide on the guide rail (8 b),

the blowing pipeline (9) comprises: the output ends of the air blowing nozzles (9 a) are horizontally arranged in the machine body (1) at equal intervals towards the negative pressure port (1 c);

the output end of the main air pipe (9 b) is communicated with the input end of the blowing nozzle (9 a), the input end of the main air pipe (9 b) is communicated with the output end of the air pump through a communicating pipe (9 c),

the material scattering device (3) comprises: the output shaft of the second servo motor (3 a) penetrates through the discharge hole of the inclined screw conveyor (2) and the hopper at the top end of the machine body (1);

the fixed roller (3 b) is coaxially and fixedly connected with an output shaft of the second servo motor (3 a), stirring rods (3 b 1) for rotating and dispersing grains are uniformly distributed at the bottom end of the fixed roller (3 b) along the axis,

the method comprises the following steps: the inclined screw conveyor, the second servo motor, the vibration motor, the first servo motor and the air pump communicated with the communicating pipe are started in advance, so that the screening machine is in a working state;

step two: grain is put into a feeding port at the bottom end of the inclined screw conveyor and is conveyed to the top end of the machine body, the whole machine body is high, the material is inconvenient to pour from the top end, the grain is poured into the feeding port at the bottom end of the inclined screw conveyor, so that the inclined screw conveyor automatically conveys the grain to the top end of the machine body, and the screening and discharging speed of the grain can be controlled by controlling the feeding speed of the inclined screw conveyor;

step three: the fixed roller drives the stirring rod to rotate at the top end of the machine body, grains at the discharge end of the inclined screw conveyor fall under the action of gravity, and the working end of the bulk cargo device spreads the grains uniformly on the top surface of the first sieve plate in the falling process of the grains, so that the grains are not easy to accumulate into clusters and directly fall on the first sieve plate, and screening is facilitated;

step four: the first sieve plate and the second sieve plate are horizontally arranged in a V-shaped opening, so that grains can pass through the first sieve plate and the second sieve plate, large impurities such as straws are stopped on the top surface of the first sieve plate, and the straws slide down to the bottom end under the action of the inclined surface of the first sieve plate; larger impurities pass through the first sieve plate and fall on the top surface of the second sieve plate, the larger impurities slide to the bottom end under the action of the inclined surface of the second sieve plate, and the vibration action of the vibration motor is transmitted to the first sieve plate and the second sieve plate through the connecting plate, so that grains pass through the sieve plates at an accelerated speed;

step five: when impurities at the bottom end of the top surface of the sieve plate are accumulated to a certain degree, the adjacent side rotating rod is rotated, and then the impurities can be discharged from the interior of the machine body outwards through the turning rod;

step six: the grain that passes through preliminary screening still has dust and the wheat bran that the quality is lighter, and when its whereabouts was to reciprocating motion's hopper in, grain was curtain whereabouts through hopper reciprocating action, blows to the negative pressure mouth through blowing mouth blowout air curtain with lighter dust and wheat bran in the grain, and remaining impurity is different parabolas with grain and falls to the impurity case in, and screens complete grain outwards discharges via going out the hopper to accomplish the screening operation.

2. The automatic screening machine for grain according to claim 1, characterized in that the upper surface of the first sieve plate (4) is provided with chutes (4 a) at equal intervals along the inclined direction thereof for facilitating the sliding of the impurities at the bottom end thereof, and the upper surface of the second sieve plate (5) is provided with chutes (4 a) with the same function.

3. The automatic grain screening machine according to claim 2, characterized in that a receiving hopper (1 d) with a wide opening facing upwards is arranged inside the machine body (1), and the receiving hopper (1 d) is positioned between the second sieve plate (5) and the reciprocating blanking hopper (8).

4. The automatic grain screening machine according to claim 3, characterized in that a horizontal spiral feeder (1 e) is further arranged at the bottom end of the machine body (1), and the discharge hopper (1 a) is communicated with a feed inlet of the horizontal spiral feeder (1 e).

5. An automatic screening machine for grain according to claim 4, characterised in that the narrow mouth of the hopper (8 a) is provided with distributing columns (8 a 1) perpendicular to its inner side at equal intervals along its sliding direction.