CN111014036B

CN111014036B - Rapeseed screening equipment for agricultural production and processing

Info

Publication number: CN111014036B
Application number: CN201911155014.XA
Authority: CN
Inventors: 王梓
Original assignee: Hunan Xiangshan Biotechnology Co ltd
Current assignee: HUNAN XIANGSHAN BIOTECHNOLOGY Co.,Ltd.
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2021-05-18
Anticipated expiration: 2039-11-22
Also published as: CN111014036A

Abstract

The invention discloses rapeseed screening equipment for agricultural production and processing, which belongs to the technical field of agricultural production and processing, and comprises a separating box, a screening box fixed on the right side of the separating box and a separating mechanism, wherein the separating box is internally provided with a separating net, a guide plate and a blanking plate, the screening box is internally provided with a first fan, an air inlet duct, a collecting cavity and a rotating cavity, and a rotating assembly is arranged in the rotating cavity. More dust is stained, and the screening effect is good and the working efficiency is high through twice screening.

Description

Rapeseed screening equipment for agricultural production and processing

Technical Field

The invention relates to the technical field of agricultural production and processing, in particular to rapeseed screening equipment for agricultural production and processing.

Background

Rapeseed, also known as canola, is a seed of brassicaceae crop rape, which has longer siliques, more pods and full seeds. The oil content of rapeseed is 37.5% -46.3%. The oil content of the rape is slightly different according to the types of the rapes. Is one of the main oil crops and honey crops in China, and the grains of the Chinese oil crops and the honey crops are one of the main varieties of oil and fat preparation raw materials.

The rape cultivation is in China, and is divided into winter rape and spring rape. The planting area of the planting area accounts for more than 40% of the total area of the Chinese oil crops, the yield accounts for more than 30% of the total yield of the Chinese oil crops, and the planting area is the first place in the world.

The rape fruits are siliques. The horn fruit is composed of a fruit peck, a fruit body and a fruit handle. After the horn fruit is mature, the fruit petal can automatically crack due to dehydration and shrinkage, and the rapeseed is spherical or oval and consists of three parts, namely seed coat, embryo and endosperm vestige. The chemical components of the seeds generally contain 3.9 to 5.2 percent of nitrogen, 24.6 to 32.4 percent of protein, 5.7 to 9.6 percent of cellulose, 4.1 to 5.3 percent of ash and 37.5 to 46.3 percent of grease.

Rapeseed oil is edible oil, has the effects of moistening dryness, killing insects, eliminating swelling and toxin and dispersing erysipelas, and is transparent or semitransparent liquid obtained by squeezing the rapeseed. The rapeseed oil is golden yellow or brownish yellow in color, has certain pungent smell, and is called green smell by folk. The gas is caused by a certain amount of sinapine, but the rapeseeds of the superior species do not contain the gas, such as high oleic rapeseed oil, double low rapeseed oil, etc.

Before oil is pressed from rapeseed, if impurities such as soil, stems and leaves carried in the rapeseed are not cleaned, the quality of grease and cake dregs can be influenced, and a part of grease can be adsorbed, so that the oil yield is reduced. If sundries such as sand stone, metal, hemp ropes and the like are clamped in the rapeseeds, parts can be abraded, production accidents are induced, and the process effect is influenced; therefore, in order to ensure smooth production, it is necessary to remove impurities as much as possible.

The traditional method for separating rapeseeds is that rape straws are paved on a flat field, and the straws are flapped manually by a special rape seed threshing tool, namely flail, so that rape seed pods are fried, the rapeseeds are separated from the rape straws, the separation efficiency is low, dust and the like are easily mixed into the rapeseeds, and the workload of subsequent screening is increased; the existing agricultural rapeseed screening device is a general winnowing machine generally, and mainly comprises a feeding hopper, a fan, a vibrating screen and the like, the feeding hopper feeds materials, the fan removes impurities in the blanking process, and then the materials fall on the vibrating screen to be screened again through the vibrating screen.

Based on the above, the invention designs the rapeseed screening device for agricultural production and processing, so as to solve the problems.

Disclosure of Invention

The invention aims to provide rapeseed screening equipment for agricultural production and processing, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a rapeseed screening device for agricultural production and processing comprises a separation box and a screening box fixed on the right side of the separation box, and is characterized in that the separation box is fixed on the upper portion of the separation box, an inclined guide plate is fixed below the separation box, an inclined blanking plate is fixed at the bottom of the separation box, the left end of the guide plate is lower than the right end of the guide plate, a vertical baffle is fixed at the left end of the guide plate, the left end of the blanking plate is higher than the right end of the blanking plate, the right end of the blanking plate penetrates through the side walls of the separation box and the screening box and extends out, discharge ports are arranged on the right side walls of the separation box and the screening box and correspond to the blanking plate, a first fan and a first air pipe are arranged at the bottom of the screening box, an air inlet channel is arranged on the right side of the middle portion of the screening box, a collection cavity is arranged on the left side of the middle portion of the screening, the collecting cavity is internally provided with a collecting tank, the lower material plate is provided with a winnowing screen corresponding to the first air pipe and the air inlet duct, a top plate is arranged above the separation box, one side of the bottom surface of the top plate is fixedly connected with the top surface of the screening box, and the top plate is provided with a separation mechanism.

Preferably, the runner assembly includes the axis of rotation, the axis of rotation is connected with the lateral wall rotation in rotation chamber, and evenly is provided with a plurality of rotation filter screens along the circumferencial direction in the axis of rotation, the one end of axis of rotation is stretched out and is rotated the chamber and be connected with the second motor.

Preferably, the separating mechanism comprises a first pressure lever and two second pressure levers, the two second pressure levers are symmetrically arranged on two sides of the first pressure lever, the top ends of the first pressure lever and the second pressure lever penetrate through the top plate and are respectively fixed with a first pressure table and a second pressure table, the bottom surfaces of the first pressure table and the second pressure table are respectively correspondingly connected with the top surface of the top plate through a buffer spring, the outer side of the first pressure lever is sleeved with a rotating cylinder, the inner wall and the outer wall of the rotating cylinder are respectively provided with an inner groove and an outer groove, the upper part of the rotating cylinder is fixed with a gear ring, the gear ring is meshed with a driving gear, the driving gear is connected with a first motor, a first connecting block is fixed on the first pressure lever and is correspondingly connected with the inner groove, the two second pressure levers are connected with the same annular plate, the inner side wall of the annular plate is provided with two second connecting blocks, and the two second connecting blocks are symmetrically, and the second connecting block is correspondingly connected with the outer groove.

Preferably, the heights of the inner groove and the outer groove are uniformly changed along the circumferential direction of the rotating cylinder, the inner groove is provided with a highest point and a lowest point, the outer groove is provided with two symmetrical highest points and two symmetrical lowest points, and the track line of the outer groove is symmetrical on two sides.

Preferably, the upper parts of the first pressure lever and the second pressure lever are provided with limiting strips, the top plate is correspondingly provided with limiting grooves, and the limiting strips and the corresponding limiting grooves slide along the vertical direction.

Preferably, the middle side wall top of collection chamber and air inlet duct is fixed with the dust collecting plate of slope, and the left end of dust collecting plate is located the top of collecting vat, it is equipped with out the dirt mouth to correspond on the lateral wall in collection chamber, the collecting vat is connected with the bottom surface sliding in collection chamber, and one end is located out dirt mouth department and fixed handle.

Preferably, the bottom right side of collecting the chamber is equipped with auxiliary fan, is equipped with the auxiliary air pipe on the auxiliary fan, the one end of auxiliary air pipe is arranged in the air inlet duct, and inclines to the upper right, also be equipped with auxiliary fan and auxiliary air pipe on the right side wall of air inlet duct to with left auxiliary fan and auxiliary air pipe symmetry.

Preferably, the right side of baffle is equipped with the cam chamber, rotates in the cam chamber and is connected with the camshaft, the one end of camshaft is connected with the third motor, be equipped with the spring groove on the left side wall that breaks away from the case, be equipped with vibrating spring in the spring groove, vibrating spring's right-hand member is connected with first sieve, the right-hand member of first sieve passes the baffle and stretches into the cam chamber, and stretches into the end and be fixed with the fixed plate, and the fixed plate corresponds with the camshaft and is connected.

Preferably, a first screen is arranged in the middle of the first screen plate, inclined material guide surfaces are symmetrically arranged on the top surface corresponding to the first screen, and the distance between the top ends of the material guide plates is larger than the distance between the baffle and the left side wall of the separation box.

Preferably, the below of first sieve is equipped with the second sieve, and the below of second sieve is equipped with the collecting box, and the centre of second sieve is equipped with the second screen cloth, and the right side bottom surface is equipped with the second shifting chute, be equipped with first shifting chute on the left side wall that breaks away from the case, the left end of second sieve is located first shifting chute, the left end top surface of flitch down is fixed with the backup pad, and the top surface of backup pad is located the second shifting chute on the second sieve, the both sides of second sieve are equipped with second vibrating spring and second camshaft respectively, and the one end of second camshaft is connected with the fourth motor.

Compared with the prior art, the invention has the beneficial effects that: the straws to be separated from rapeseeds are placed on the separation net, and are flapped by the separation mechanism, so that the rapeseeds are separated, fall on the guide plate through first screening of the separation net, then move along the blanking plate, and are winnowed, so that light crushed slag and the like enter the air inlet duct to be collected, and the rapeseeds move obliquely upwards and then fall on the blanking plate towards the lower right, so that the separation, separation mesh screening and winnowing are continuously completed, the separation is convenient, the rapeseeds can be prevented from contacting the bottom surface and being stained with more dust, and the screening effect is good and the working efficiency is high through twice screening; after the crushed slag in the rapeseeds enters the air inlet duct, the crushed slag continues to move upwards under the action of the auxiliary fans and the auxiliary air pipes on the two sides, so that the crushed slag can smoothly enter the collection cavity; the first sieve plate moves left and right to screen rapeseeds, and the larger rapeseed pod crushed slag is screened out to facilitate subsequent winnowing; the rapeseeds are screened by the second sieve plate, so that small-particle impurities mixed in the rapeseeds are screened out, the size of the impurities mixed in the rapeseeds is further controlled, and the like, thereby reducing the impurities participating in winnowing and improving the winnowing efficiency and precision.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the detachment mechanism of the present invention;

FIG. 3 is a schematic view showing the inner side wall of the rotary cylinder according to the present invention being unfolded;

FIG. 4 is a schematic view of the outer sidewall of the rotary cylinder of the present invention expanded;

FIG. 5 is a schematic structural diagram according to a second embodiment of the present invention;

FIG. 6 is a schematic view of a collection chamber according to the present invention;

FIG. 7 is a schematic structural diagram of a third embodiment of the present invention;

fig. 8 is a schematic structural view of a first screen deck in the fourth embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fifth embodiment of the present invention;

fig. 10 is a schematic view of the structure of a second screen deck of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-disengaging box, 101-disengaging net, 102-guide plate, 103-baffle, 104-spring groove, 105-cam cavity, 106-first moving groove, 2-screening box, 201-air inlet duct, 202-rotating cavity, 203-ventilating filter screen, 204-rotating filter screen, 205-collecting cavity, 206-collecting groove, 207-dust collecting plate, 208-auxiliary fan, 209-auxiliary air duct, 3-top plate, 4-disengaging mechanism, 401-first pressing plate, 402-first pressing rod, 403-first pressing table, 404-second pressing plate, 405-second pressing rod, 406-second pressing table, 407-annular plate, 408-rotating cylinder, 409-driving gear, 410-first motor, 411-inner groove, 412-outer groove, 5-blanking plate, 501-winnowing screen, 502-support plate, 6-first fan, 601-first air pipe, 7-first sieve plate, 701-vibrating spring, 702-cam shaft, 703-first sieve plate, 704-fixing plate, 8-second sieve plate, 801-first sieve plate, 802-second moving groove and 9-collecting box.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Example one

Referring to the drawings, the present invention provides a technical solution: a rapeseed screening device for agricultural production and processing comprises a separation box 1 and a screening box 2 fixed on the right side of the separation box 1, and is characterized in that the separation box 1 is fixed on the upper portion of the separation box 1 with a separation net 101, an inclined guide plate 102 is fixed below the separation net 101, an inclined blanking plate 5 is fixed at the bottom of the separation box, the left end of the guide plate 102 is lower than the right end, a vertical baffle plate 103 is fixed at the left end, the left end of the blanking plate 5 is higher than the right end, the right end penetrates through the side walls of the separation box 1 and the screening box 2 and extends out, discharge ports are arranged on the right side walls of the separation box 1 and the screening box 2 corresponding to the blanking plate 5, a first fan 6 and a first air pipe 601 are arranged at the bottom of the screening box 2, an air inlet channel 201 is arranged on the right side of the middle portion, a collection cavity 205 is arranged on the left side of the middle portion, a rotation cavity 202 is arranged at the top of, be equipped with ventilation filter screen 203 in the air outlet, be equipped with the runner assembly in rotating the chamber 202, be equipped with collecting vat 206 in the collection chamber 205, the position that corresponds first tuber pipe 601 and intake duct 201 on the flitch 5 down is equipped with selection by winnowing screen 501, the top that breaks away from case 1 is equipped with roof 3, and the bottom surface one side of roof 3 and the top surface fixed connection of screening case 2, be equipped with on the roof 3 and break away from mechanism 4.

The runner assembly includes the axis of rotation, the axis of rotation rotates with the lateral wall that rotates chamber 202 to be connected, and evenly is provided with a plurality of rotation filter screens 204 along the circumferencial direction in the axis of rotation, the one end of axis of rotation stretches out and rotates chamber 202 and is connected with the second motor.

The release mechanism 4 comprises a first compression bar 402 and two second compression bars 405, the two second compression bars 405 are symmetrically arranged at two sides of the first compression bar 402, the top ends of the first compression bar 402 and the second compression bar 405 penetrate through the top plate 3 and are respectively fixed with a first pressing platform 403 and a second pressing platform 406, the bottom surfaces of the first pressing platform 403 and the second pressing platform 406 are respectively and correspondingly connected with the top surface of the top plate 3 through a buffer spring, the outer side of the first compression bar 402 is sleeved with a rotating cylinder 408, the inner wall and the outer wall of the rotating cylinder 408 are respectively provided with an inner groove 411 and an outer groove 412, the upper part of the rotating cylinder 408 is fixed with a gear ring, the gear ring is meshed with a driving gear 409, the driving gear 409 is connected with a first motor 410, the first compression bar 402 is fixed with a first connecting block, the first connecting block is correspondingly connected with the inner groove 411, the two second compression bars 405 are connected with a same annular plate 407, and the inner side wall of the annular plate 407 is, and two second connecting blocks are symmetrically arranged and correspondingly connected with the outer groove 412.

The heights of the inner groove 411 and the outer groove 412 are uniformly changed along the circumferential direction of the rotary cylinder 408, the inner groove 411 has a highest point and a lowest point, the outer groove 412 has two symmetrical highest points and two symmetrical lowest points, and the trajectory line of the outer groove 412 is bilaterally symmetrical.

The upper parts of the first pressure lever 402 and the second pressure lever 405 are provided with limiting strips, the top plate 3 is correspondingly provided with limiting grooves, and the limiting strips and the corresponding limiting grooves slide along the vertical direction.

Collect chamber 205 and air inlet duct 201's middle lateral wall top is fixed with the dust collecting plate 207 of slope, and the left end of dust collecting plate 207 is located the top of collecting vat 206, it is equipped with out the dirt mouth to correspond on the lateral wall of collecting chamber 205, collecting vat 206 and the bottom surface sliding connection who collects chamber 205, and one end is located out dirt mouth department and fixed handle.

The working principle of the embodiment is as follows: putting straws to be separated from rapeseeds on a separation net 101, starting a first motor 410, enabling a driving gear 409 and a gear ring to drive a rotary cylinder 408 to rotate, enabling a first pressure rod 402, an annular plate 407 and a second pressure rod 405 to move through an inner groove 411 and an outer groove 412 of the rotary cylinder 408, enabling the second pressure rod 405 to move downwards under the action of the annular plate 407 when the first pressure rod 402 moves upwards, enabling a first pressure plate 401 and a second pressure plate 404 to move upwards and downwards to flap the straws, enabling the rapeseeds to be separated from the straws, falling onto a material guide plate 102 through first screening of a separation screen, mixing with rapeseed pod crushed slag and the like in the rapeseeds, then enabling the rapeseeds to move along the material guide plate 102, falling onto a material falling plate 5 and passing through an air separation screen 501, enabling a first fan 6 to move upwards obliquely through a first air pipe 601, enabling the rapeseeds to move upwards, light crushed slag and the like to enter an air inlet channel 201 and move into a collecting tank 206 of a collecting chamber 205 through a rotary screen 204, the rapeseed continuously breaks away from, breaks away from the screening and winnowing of the net 101, is convenient to break away from, can avoid the contact of the rapeseed and the bottom surface and is polluted by more dust, and the screening effect is good and the working efficiency is high through twice screening.

Example two

On the basis of the first embodiment, the right side of the bottom of the collection cavity 205 is provided with an auxiliary fan 208, the auxiliary fan 208 is provided with an auxiliary air duct 209, one end of the auxiliary air duct 209 is positioned in the air inlet duct 201 and inclines to the upper right, and the right side wall of the air inlet duct 201 is also provided with the auxiliary fan 208 and the auxiliary air duct 209 and is symmetrical to the auxiliary fan 208 and the auxiliary air duct 209 on the left side.

The working principle of this embodiment is basically the same as that of the first embodiment, except that after the crushed slag in the rapeseeds enters the air inlet duct 201, the crushed slag continues to move upwards through the action of the auxiliary fans 208 and the auxiliary air pipes 209 at the two sides, so that the crushed slag can smoothly enter the collection chamber 205.

EXAMPLE III

On the basis of embodiment two, the right side of baffle 103 is equipped with cam chamber 105, and swivelling joint has camshaft 702 in the cam chamber 105, the one end of camshaft 702 is connected with the third motor, be equipped with spring groove 104 on the left side wall that breaks away from case 1, be equipped with vibrating spring 701 in the spring groove 104, vibrating spring 701's right-hand member is connected with first sieve 7, the right-hand member of first sieve 7 passes baffle 103 and stretches into cam chamber 105, and stretches into the end and be fixed with fixed plate 704, and fixed plate 704 corresponds with camshaft 702 and is connected.

After the rapeseeds are separated from the straws, the rapeseeds fall onto the material guide plate 102 through the separation net 101, and fall onto the first sieve plate 7 after moving to the left end along the material guide plate 102, and the third motor drives the cam shaft 702 to rotate, so that the first sieve plate 7 moves left and right, the rapeseeds are screened, and the larger rapeseed pod crushed slag is screened out, thereby facilitating the subsequent air separation.

Example four

On the basis of the third embodiment, the first screen 703 is disposed in the middle of the first screen deck 7, the inclined material guiding surfaces are symmetrically disposed on the top surface corresponding to the first screen 703, and the distance between the top ends of the material guiding plates 102 is greater than the distance between the baffle plate 103 and the left sidewall of the separation box 1.

When the rapeseeds fall on the first sieve plate 7, the rapeseeds are concentrated on the first sieve 703 through the inclined material guiding surface to be screened, so that the rapeseeds are prevented from falling to other places and causing waste.

EXAMPLE five

On the basis of the fourth embodiment, a second sieve plate 8 is arranged below the first sieve plate 7, a collecting box 9 is arranged below the second sieve plate 8, a second screen 801 is arranged in the middle of the second sieve plate 8, a second moving groove 802 is arranged on the bottom surface of the right side of the second sieve plate 8, a first moving groove 106 is arranged on the left side wall of the separation box 1, the left end of the second sieve plate 8 is located in the first moving groove 106, a supporting plate 502 is fixed on the top surface of the left end of the blanking plate 5, the top surface of the supporting plate 502 is located in the second moving groove 802 on the second sieve plate 8, a second vibrating spring and a second cam shaft are respectively arranged on two sides of the second sieve plate 8, and one end of the second cam shaft is connected with a fourth motor.

After the rapeseeds are screened by the first screen plate 7, the rapeseeds fall on the second screen plate 8, the second screen plate 8 is moved left and right through the fourth motor, the cam shaft 702 and the like, the rapeseeds are screened, small particle impurities mixed in the rapeseeds are screened out and fall into the collecting box 9, the size and the like of the impurities mixed in the rapeseeds are further controlled, and therefore the impurities participating in winnowing are reduced, and the winnowing efficiency and accuracy are improved.

EXAMPLE six

On the basis of the fifth embodiment, the wind power generation system further comprises a controller, wherein the controller is electrically connected with the first motor 410, the second motor, the third motor, the fourth motor, the first fan 6 and the auxiliary fan 208, the motors and the fans are enabled to work in a timing mode according to the working principle through the controller, and the rotating speed of the motors and the wind power of the fans are controlled through the controller.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The rapeseed screening device for agricultural production and processing comprises a separation box (1) and a screening box (2) fixed on the right side of the separation box (1), and is characterized in that the separation box (1) is fixed on the upper portion of the separation box (1) with a separation net (101), an inclined guide plate (102) is fixed below the separation net (101), an inclined blanking plate (5) is fixed at the bottom of the separation box, the left end of the guide plate (102) is lower than the right end, a vertical baffle (103) is fixed at the left end, the left end of the blanking plate (5) is higher than the right end, the right end penetrates through the side walls of the separation box (1) and the screening box (2) and extends out, discharge ports are arranged on the right side walls of the separation box (1) and the screening box (2) corresponding to the blanking plate (5), a first fan (6) and a first air pipe (601) are arranged at the bottom of the screening box (2), and an air inlet duct (201) is arranged on the right side of, a collection cavity (205) is arranged on the left side of the middle of the separation box, a rotating cavity (202) is arranged at the top of the separation box, an air outlet is formed in the top surface of the rotating cavity (202) and corresponds to the air inlet duct (201), a ventilation filter screen (203) is arranged in the air outlet, a rotating assembly is arranged in the rotating cavity (202), a collecting tank (206) is arranged in the collection cavity (205), a winnowing screen (501) is arranged on the blanking plate (5) and corresponds to the first air pipe (601) and the air inlet duct (201), a top plate (3) is arranged above the separation box (1), one side of the bottom surface of the top plate (3) is fixedly connected with the top surface of the screening box (2), and a separation mechanism (;

the separation mechanism (4) comprises a first pressure lever (402) and two second pressure levers (405), the two second pressure levers (405) are symmetrically arranged on two sides of the first pressure lever (402), the top ends of the first pressure lever (402) and the second pressure lever (405) penetrate through the top plate (3) and are respectively fixed with a first pressure table (403) and a second pressure table (406), the bottom surfaces of the first pressure table (403) and the second pressure table (406) are respectively and correspondingly connected with the top surface of the top plate (3) through buffer springs, the outer side of the first pressure lever (402) is sleeved with a rotating cylinder (408), the inner wall and the outer wall of the rotating cylinder (408) are respectively provided with an inner groove (411) and an outer groove (412), the upper part of the rotating cylinder (408) is fixed with a gear ring, the gear ring is meshed with a driving gear (409), the driving gear (409) is connected with a first motor (410), and a first connecting block is fixed on the first pressure lever (402), the first connecting blocks are correspondingly connected with the inner groove (411), the two second pressure rods (405) are connected with the same annular plate (407), the inner side wall of the annular plate (407) is provided with two second connecting blocks, the two second connecting blocks are symmetrically arranged, and the second connecting blocks are correspondingly connected with the outer groove (412);

the heights of the inner groove (411) and the outer groove (412) are uniformly changed along the circumferential direction of the rotating cylinder (408), the inner groove (411) is provided with a highest point and a lowest point, the outer groove (412) is provided with two symmetrical highest points and two symmetrical lowest points, and the track line of the outer groove (412) is symmetrical on two sides;

the upper portions of the first pressing rod (402) and the second pressing rod (405) are provided with limiting strips, limiting grooves are correspondingly formed in the top plate (3), and the limiting strips and the corresponding limiting grooves slide along the vertical direction.

2. The rapeseed screening apparatus for agricultural production and processing according to claim 1, wherein: the runner assembly includes the axis of rotation, the axis of rotation rotates with the lateral wall that rotates chamber (202) to be connected, and evenly is provided with a plurality of rotation filter screens (204) along the circumferencial direction in the axis of rotation, the one end of axis of rotation is stretched out and is rotated chamber (202) and be connected with the second motor.

3. The rapeseed screening apparatus for agricultural production and processing according to claim 1, wherein: collect chamber (205) and the middle lateral wall top of air inlet duct (201) and be fixed with the dust collecting plate (207) of slope, and the left end of dust collecting plate (207) is located the top of collecting vat (206), it is equipped with out the dirt mouth to correspond on the lateral wall of collecting chamber (205), collecting vat (206) and the bottom surface sliding connection who collects chamber (205), and one end is located out dirt mouth department and fixed handle.

4. The rapeseed screening apparatus for agricultural production and processing according to claim 3, wherein: the bottom right side of collecting chamber (205) is equipped with auxiliary fan (208), is equipped with auxiliary air pipe (209) on auxiliary fan (208), the one end of auxiliary air pipe (209) is arranged in air inlet duct (201), and the top slope right, also be equipped with auxiliary fan (208) and auxiliary air pipe (209) on the right side wall of air inlet duct (201) to be symmetrical with left auxiliary fan (208) and auxiliary air pipe (209).

5. The rapeseed screening apparatus for agricultural production and processing according to claim 1, wherein: the right side of baffle (103) is equipped with cam chamber (105), and it is connected with camshaft (702) to rotate in cam chamber (105), the one end of camshaft (702) is connected with the third motor, be equipped with spring groove (104) on the left side wall that breaks away from case (1), be equipped with vibrating spring (701) in spring groove (104), the right-hand member of vibrating spring (701) is connected with first sieve (7), the right-hand member of first sieve (7) passes baffle (103) and stretches into cam chamber (105), and stretches into the end and be fixed with fixed plate (704), and fixed plate (704) correspond with camshaft (702) and are connected.

6. The rapeseed screening apparatus for agricultural production and processing according to claim 5, wherein: the middle of the first sieve plate (7) is provided with a first screen (703), the top surface of the first sieve plate is symmetrically provided with inclined material guide surfaces corresponding to the first screen (703), and the distance between the top ends of the material guide plates (102) is larger than the distance between the baffle (103) and the left side wall of the separation box (1).

7. The rapeseed screening apparatus for agricultural production and processing according to claim 5, wherein: the below of first sieve (7) is equipped with second sieve (8), and the below of second sieve (8) is equipped with collecting box (9), and the centre of second sieve (8) is equipped with second screen cloth (801), and the right side bottom surface is equipped with second shifting chute (802), be equipped with first shifting chute (106) on the left side wall that breaks away from case (1), the left end of second sieve (8) is arranged in first shifting chute (106), the left end top surface of flitch (5) down is fixed with backup pad (502), and the top surface of backup pad (502) is arranged in second shifting chute (802) on second sieve (8), the both sides of second sieve (8) are equipped with second vibrating spring and second camshaft respectively, and the one end of second camshaft is connected with the fourth motor.