阅读说明：本技术 一种农业用大豆种子筛选设备 (Soybean seed screening installation for agricultural use ) 是由 李曦 吴爱华 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种农业用大豆种子筛选设备,包括容置组件、固定围挡、收集斗、驱动组件、顶板、投入组件和排出组件,在所述固定围挡底端连接有收集斗,收集斗底端固定连接有第二排出管,在所述固定围挡顶端内部固定有水平的顶板,在所述顶板下方的固定围挡、收集斗内部设置有容置组件,在所述顶板上安装有用于驱动容置组件往复旋转的驱动组件。本发明的有益效果是：能够利用离心力在筛选斗内部持续往复甩动大豆,较为高效的对大豆进行筛选,直至筛选完成,相对封闭的容置组件的设计,能够在大豆筛选过程中降低扬尘,避免操作人员被灰尘感染的情况,排出组件能够在筛选结束后较为方便的排出滞留于容置组件内部的大豆。(The invention discloses agricultural soybean seed screening equipment which comprises an accommodating component, a fixed enclosure, a collecting hopper, a driving component, a top plate, an input component and a discharge component, wherein the bottom end of the fixed enclosure is connected with the collecting hopper, the bottom end of the collecting hopper is fixedly connected with a second discharge pipe, the horizontal top plate is fixed inside the top end of the fixed enclosure, the accommodating component is arranged inside the fixed enclosure and the collecting hopper below the top plate, and the driving component for driving the accommodating component to rotate in a reciprocating mode is mounted on the top plate. The invention has the beneficial effects that: can utilize centrifugal force to fight inside reciprocal whipping soybean continuously at the screening, comparatively efficient screens the soybean, and the design of relative confined holding subassembly can reduce the raise dust at soybean screening in-process, avoids operating personnel to be infected by the condition of dust, and the discharge subassembly can be detained in the inside soybean of holding subassembly in the comparatively convenient discharge after the screening is ended.)

1. The utility model provides a soybean seed screening installation is used to agricultural, encloses fender (1), collection fill (2), drive assembly, roof (4), drops into subassembly and discharge assembly, its characterized in that including holding subassembly, fixed: the fixed enclosure (1) is of an annular structure with an opening at the upper end and an opening at the lower end, the bottom end of the fixed enclosure (1) is connected with a collecting hopper (2), the bottom end of the collecting hopper (2) is fixedly connected with a second discharge pipe (13), and a plurality of groups of vertical supporting legs (10) are fixedly connected below the collecting hopper (2), a horizontal top plate (4) is fixed in the top end of the fixed enclosure (1), an accommodating component is arranged in the fixed enclosure (1) and the collecting hopper (2) below the top plate (4), a driving component for driving the containing component to rotate in a reciprocating manner is arranged on the top plate (4), the containing component comprises an upper cover (6), a rotary enclosure (9) and a screening hopper (3), the rotary enclosing baffle (9) is of an annular structure with an opening at the upper end and an opening at the lower end, the rotary enclosing baffle (9) is fixed at the opening at the top end of the screening hopper (3), an upper cover (6) is fixed on the inner edge surface of the top end of the rotary enclosure (9);

an input assembly communicated with the interior of the containing assembly is fixed on the top plate (4), and the input assembly comprises a first feeding pipe (8) which is vertically arranged;

the screening fill (3) bottom department still installs the discharge subassembly, the discharge subassembly is including fixed first discharge tube (12) that pass collection fill (2) diapire vertical setting and flexible conveying pipe (31) that pass screening fill (3) bottom and let in to screening fill (3) inside.

2. The agricultural soybean seed screening apparatus according to claim 1, wherein: the rotary enclosure is characterized in that a second connecting ring (26) surrounding the rotary enclosure for a circle is fixed on the outer annular surface of the rotary enclosure (9), a group of first connecting rings (25) attached to the second connecting ring (26) are arranged on the upper side and the lower side of the second connecting ring (26), the two groups of first connecting rings (25) are fixed on the inner side wall of the fixed enclosure (1), annular grooves are formed in the connecting surfaces of the first connecting rings (25) and the second connecting rings (26), and balls are arranged in the annular grooves.

3. The agricultural soybean seed screening apparatus according to claim 1, wherein: the feeding assembly further comprises a feeding hopper (5), the feeding hopper (5) is located above the top plate (4), the feeding hopper (5) is fixed to the top end of the first feeding pipe (8), the first feeding pipe (8) fixedly penetrates through the top plate (4), the bottom end of the first feeding pipe (8) penetrates through the upper cover (6) to extend into the accommodating assembly, and the upper cover (6) is rotatably sleeved outside the first feeding pipe (8).

4. The agricultural soybean seed screening apparatus according to claim 1, wherein: the driving component comprises a first gear ring (7), a second gear (22), a first gear (23), a first rotating shaft (14), a rack bar (21), a second gear ring (20) and a half gear (19), the first gear ring (7) is fixed at the center of the top surface of the upper cover (6), a second gear (22) is meshed with the first gear ring (7), the second gear (22) is fixedly connected to the bottom end of a first rotating shaft (14) which is vertically arranged, the top end of the first rotating shaft (14) is rotatably connected to the top plate (4) through a bearing, and the top end of the first rotating shaft (14) extends to the upper part of the top plate (4) and is fixedly connected with a first gear (23), a horizontal toothed bar (21) is arranged in mesh with the first gear (23), the toothed bar (21) is fixed on one end of the second toothed ring (20), a half gear (19) is meshed in the second gear ring (20), and the half gear (19) is fixed on a crankshaft of a first motor (15) fixed on the bottom surface of the top plate (4).

5. The agricultural soybean seed screening apparatus according to claim 4, wherein: two groups of holding rods (17) are arranged in parallel with the toothed rod (21), the two groups of holding rods (17) are positioned on two sides of the second toothed ring (20), a sleeve (16) which is slidably sleeved on the holding rods (17) is fixed on the outer side of the second toothed ring (20), a first connecting plate (18) is fixedly connected to the end part of each holding rod (17), and the first connecting plate (18) is fixed on the top end face of the top plate (4).

6. The agricultural soybean seed screening apparatus according to claim 1, wherein: a moving assembly for moving the delivery pipe (31) relative to the first discharge pipe (12) is further installed on one side of the first discharge pipe (12), a limiting clamping block (32) is fixed on the outer wall of the bottom end of the delivery pipe (31) inserted into the first discharge pipe (12), a sliding groove (33) matched with the limiting clamping block (32) is arranged in the first discharge pipe (12), a vertical fixed pipe (11) is arranged between the delivery pipe (31) and the first delivery pipe (8), a plurality of groups of vertical insertion rods (29) are fixed at the top end of the delivery pipe (31), slots (30) for inserting the plurality of groups of insertion rods (29) are arranged at the bottom end of the fixed pipe (11), a conical cover (28) is further fixed at the top end of the fixed pipe (11), and the conical cover (28) is fixedly connected with the bottom end of the first feeding pipe (8) through a vertical connecting rod (27).

7. The agricultural soybean seed screening apparatus according to claim 6, wherein: the movable assembly comprises a second connecting plate (34), a threaded pipe sleeve (35), a threaded rod (36), a fourth gear (41), a third gear (40), a second rotating shaft (39) and a second motor (37), the threaded rod (36) is arranged inside the delivery pipe (31) and the first discharge pipe (12) along the axial lead direction of the delivery pipe (31) and the first discharge pipe (12), the bottom section of the threaded rod (36) is rotatably connected to a connecting seat fixed inside the first discharge pipe (12) through a bearing, the threaded pipe sleeve (35) is sleeved on the threaded rod (36) in a threaded manner, the second connecting plate (34) fixedly connected with the threaded pipe sleeve (35) is fixed inside the delivery pipe (31), the fourth gear (41) is fixed on the bottom end of the threaded rod (36), the third gear (40) is meshed with the fourth gear (41), and the third gear (40) is fixed on one end of the horizontal second rotating shaft (39), the middle section of second pivot (39) passes through the bearing and rotates and connect first discharge tube (12) lateral wall, and second pivot (39) are located the bent axle of the outside one end fixedly connected with second motor (37) of first discharge tube (12), and second motor (37) are fixed on collecting hopper (2) bottom fixed mounting panel (38), still are fixed with protection casing (42) on threaded rod (36) bottom segment above fourth gear (41).

Technical Field

The invention relates to a screening device, in particular to agricultural soybean seed screening equipment, and belongs to the technical field of agricultural machinery.

Background

Soybeans are cultivated in China, and are widely cultivated all over the world. Soybean is one of the important grain crops in China, has been cultivated for five thousand years, is called Shushu in ancient times, and is a crop with seeds containing rich plant protein, wherein northeast China is the main production area.

The screening device for soybean breeding still has certain defect when using, and current screening device is when distinguishing soybean size through the shake, very easily produces the dust at the in-process of screening, leads to the screening environment poor, when using the cylinder to carry out soybean size differentiation, and soybean falling speed is fast in the tilting cylinder, and the screening is thorough inadequately, and it is difficult for discharging to detain the soybean in the horizontal formula cylinder.

Disclosure of Invention

The invention aims to solve the problems, and provides agricultural soybean seed screening equipment, which can utilize centrifugal force to continuously and reciprocally whip soybeans in a screening hopper, screen the soybeans more efficiently until screening is completed, can reduce dust during soybean screening by designing a relatively closed accommodating component, avoids the condition that an operator is infected by dust, and can conveniently discharge the soybeans remained in the accommodating component by a discharge component after screening is completed.

The invention achieves the aim through the following technical scheme, and the agricultural soybean seed screening equipment comprises a containing assembly, a fixed enclosure, a collecting hopper, a driving assembly, a top plate, a feeding assembly and a discharging assembly, wherein the fixed enclosure is of an annular structure with an opening at the upper end and a lower end, the bottom end of the fixed enclosure is connected with the collecting hopper, the bottom end of the collecting hopper is fixedly connected with a second discharging pipe, a plurality of groups of vertical supporting legs are fixedly connected below the collecting hopper, a horizontal top plate is fixedly arranged inside the top end of the fixed enclosure, the containing assembly is arranged inside the fixed enclosure and the collecting hopper below the top plate, the driving assembly for driving the containing assembly to rotate in a reciprocating manner is arranged on the top plate, the containing assembly comprises an upper cover, a rotating enclosure and a screening hopper, the rotating enclosure is of an annular structure with an opening at the upper end and a lower end, and the rotating enclosure is fixedly arranged at the opening at the top end of the screening hopper, an upper cover is fixed on the inner edge surface of the top end of the rotary enclosure;

an input assembly communicated with the interior of the containing assembly is fixed on the top plate, and the input assembly comprises a first feeding pipe which is vertically arranged;

screening fill bottom end department still installs the discharge subassembly, the discharge subassembly passes the vertical first discharge tube that sets up of collection fill diapire and stretches out and draws back and pass the screening fill bottom and let in to the inside delivery pipe of screening fill including fixed.

Preferably, in order to improve the stability of the rotation of the accommodating assembly, a second connecting ring surrounding the rotation enclosure for a circle is fixed on the outer annular surface of the rotation enclosure, a group of first connecting rings attached to the second connecting ring are arranged on the upper side and the lower side of each second connecting ring, two groups of first connecting rings are fixed on the inner side wall of the fixed enclosure, annular grooves are formed in the joint surfaces of the first connecting rings and the second connecting rings, and balls are arranged in the annular grooves.

Preferably, in order to conveniently screen the soybeans put into the relatively closed accommodating component, the putting component further comprises a putting hopper, the putting hopper is located above the top plate and fixed at the top end of the first feeding pipe, the first feeding pipe fixedly penetrates through the top plate, the bottom end of the first feeding pipe penetrates through the upper cover and extends into the accommodating component, and the upper cover is rotatably sleeved outside the first feeding pipe.

Preferably, in order to can reciprocal rotatory holding subassembly, utilize centrifugal force to get rid of the soybean outward and screen the soybean, drive assembly includes first ring gear, second gear, first pivot, ratch, second ring gear and semi-gear, first ring gear is fixed at upper cover top surface center, with first ring gear meshing is provided with the second gear, and second gear fixed connection is on the first pivot bottom of vertical setting, and first pivot top is rotated through the bearing and is connected on the roof, and first pivot top extends the first gear of roof top fixedly connected with, with first gear meshing is provided with the horizontally ratch, and the ratch is fixed on second ring gear one end, is provided with the semi-gear at the inside meshing of second ring gear, and the semi-gear is fixed on the spindle of the first motor of roof bottom surface fixed.

Preferably, in order to limit the movement of the second ring gear and improve the movement stability thereof, two sets of holding rods are arranged in parallel with the ring gear, the two sets of holding rods are positioned at two sides of the second ring gear, a sleeve slidably sleeved on the holding rods is fixed at the outer side of the second ring gear, and a first connecting plate is fixedly connected to the end of the holding rods and fixed on the top end surface of the top plate.

Preferably, in order to be convenient for discharging the soybeans retained in the screening hopper, a moving assembly used for moving the delivery pipe relative to the first delivery pipe is further installed on one side of the first delivery pipe, a limiting fixture block is fixed on the outer wall of the bottom end of the delivery pipe inserted into the first delivery pipe, a sliding groove matched with the limiting fixture block is formed in the first delivery pipe, a vertical fixed pipe is further arranged between the delivery pipe and the first delivery pipe, multiple groups of vertical insertion rods are fixed at the top end of the delivery pipe, slots for inserting the multiple groups of insertion rods are formed in the bottom end of the fixed pipe, a conical cover is further fixed at the top end of the fixed pipe, and the conical cover is fixedly connected with the bottom end of the first delivery pipe through the vertical connecting rods.

Preferably, the moving assembly comprises a second connecting plate, a threaded pipe sleeve, a threaded rod, a fourth gear, a third gear, a second rotating shaft and a second motor, the threaded rod is arranged in the delivery pipe and the first delivery pipe along the axial lead direction of the delivery pipe and the first delivery pipe, the bottom section of the threaded rod is rotatably connected to a connecting seat fixed in the first delivery pipe through a bearing, the threaded pipe sleeve is sleeved on the threaded rod in a threaded manner, the second connecting plate fixedly connected with the threaded pipe sleeve is fixed in the delivery pipe, the fourth gear is fixed at the bottom end of the threaded rod, the third gear is meshed with the fourth gear and is fixed at one end of a horizontal second rotating shaft, the middle section of the second rotating shaft is rotatably connected with the side wall of the first delivery pipe through a bearing, the end of the second rotating shaft positioned outside the first delivery pipe is fixedly connected with a crankshaft of the second motor, the second motor is fixed on a mounting plate fixed at the bottom of the collecting hopper, and a protective cover is also fixed on the bottom section of the threaded rod above the fourth gear.

The invention has the beneficial effects that: according to the soybean screening machine, through the design of the driving assembly, the accommodating assembly can be rotated in a reciprocating manner under the driving of the first motor, soybeans are continuously thrown in a reciprocating manner in the screening hopper by utilizing centrifugal force, and soybean seeds can be screened more efficiently until the screening is finished; through the design of the relatively closed accommodating component, dust can be reduced in the soybean screening process, and the condition that operators are infected by dust is avoided; through the design of discharge subassembly, can comparatively convenient discharge be detained in the inside soybean of holding subassembly after the screening.

Drawings

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

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

FIG. 3 is a schematic view of a driving assembly according to the present invention;

FIG. 4 is a schematic view of the structure of part A of FIG. 1 according to the present invention;

FIG. 5 is a schematic view of the structure of part B in FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the structure of the portion C in FIG. 1 according to the present invention;

FIG. 7 is a schematic view of the structure of portion D of FIG. 1 according to the present invention;

FIG. 8 is a schematic view of the first feed tube and stationary tube configuration of the present invention;

fig. 9 is a schematic view of a first discharge pipe and feed pipe configuration of the present invention.

In the figure: the device comprises a fixed enclosure 1, a collecting hopper 2, a screening hopper 3, a top plate 4, a throwing hopper 5, an upper cover 6, a first toothed ring 7, a first feeding pipe 8, a rotating enclosure 9, a support leg 10, a fixed pipe 11, a first discharging pipe 12, a second discharging pipe 13, a first rotating shaft 14, a first motor 15, a sleeve 16, a retaining rod 17, a first connecting plate 18, a half gear 19, a second toothed ring 20, a toothed rod 21, a second gear 22, a first gear 23, a first connecting ring 25, a second connecting ring 26, a connecting rod 27, a conical cover 28, a connecting rod 29, a slot 30, a feeding pipe 31, a limiting fixture 32, a sliding groove 33, a second connecting plate 34, a threaded pipe sleeve 35, a threaded rod 36, a second motor 37, a mounting plate 38, a second rotating shaft 39, a third gear 40, a fourth gear 41 and a protective cover 42.

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. 1-9, an agricultural soybean seed screening apparatus includes a receiving assembly, a fixed enclosure 1, a collecting hopper 2, a driving assembly, a top plate 4, a feeding assembly and a discharging assembly, wherein the fixed enclosure 1 is an annular structure with an open upper end and a lower end, the bottom end of the fixed enclosure 1 is connected with the collecting hopper 2, the bottom end of the collecting hopper 2 is fixedly connected with a second discharge pipe 13, a plurality of sets of vertical support legs 10 are fixedly connected below the collecting hopper 2, a horizontal top plate 4 is fixedly arranged inside the top end of the fixed enclosure 1, the receiving assembly is arranged inside the fixed enclosure 1 and the collecting hopper 2 below the top plate 4, the driving assembly for driving the receiving assembly to rotate back and forth is mounted on the top plate 4, the receiving assembly includes an upper cover 6, a rotating enclosure 9 and a screening hopper 3, the rotating enclosure 9 is an annular structure with an open upper end and a lower end, the rotary enclosure 9 is fixed at an opening at the top end of the screening hopper 3, and an upper cover 6 is fixed on the inner edge surface at the top end of the rotary enclosure 9;

an input assembly communicated with the interior of the containing assembly is fixed on the top plate 4 and comprises a first feeding pipe 8 which is vertically arranged;

the bottom of the screening hopper 3 is also provided with a discharge assembly, and the discharge assembly comprises a first discharge pipe 12 which fixedly penetrates through the bottom wall of the collecting hopper 2 and is vertically arranged and a delivery pipe 31 which extends and retracts to penetrate through the bottom of the screening hopper 3 and is introduced into the screening hopper 3.

As a technical optimization scheme of the present invention, a second connecting ring 26 surrounding the rotating enclosure 9 for one circle is fixed on the outer annular surface of the rotating enclosure 9, a group of first connecting rings 25 attached to the second connecting ring 26 are respectively arranged on the upper and lower sides of the second connecting ring 26, two groups of the first connecting rings 25 are fixed on the inner side wall of the fixed enclosure 1, annular grooves are respectively arranged on the connecting surfaces of the first connecting rings 25 and the second connecting rings 26, and balls are arranged in the annular grooves.

As a technical optimization scheme of the invention, the input assembly further comprises an input hopper 5, the input hopper 5 is positioned above the top plate 4, the input hopper 5 is fixed at the top end of a first feeding pipe 8, the first feeding pipe 8 fixedly penetrates through the top plate 4, the bottom end of the first feeding pipe 8 penetrates through an upper cover 6 and extends into the accommodating assembly, and the upper cover 6 is rotatably sleeved outside the first feeding pipe 8.

As a technical optimization scheme of the present invention, the driving assembly includes a first gear ring 7, a second gear 22, a first gear 23, a first rotating shaft 14, a rack bar 21, a second gear ring 20 and a half gear 19, the first gear ring 7 is fixed at the center of the top surface of the upper cover 6, the second gear 22 is arranged in a meshing manner with the first gear ring 7, the second gear 22 is fixedly connected to the bottom end of the first rotating shaft 14 which is vertically arranged, the top end of the first rotating shaft 14 is rotatably connected to the top plate 4 through a bearing, the top end of the first rotating shaft 14 extends to the upper side of the top plate 4 and is fixedly connected with the first gear 23, the horizontal rack bar 21 is arranged in a meshing manner with the first gear 23, the rack bar 21 is fixed at one end of the second gear ring 20, the half gear 19 is arranged in the second gear ring 20 in a meshing manner, and the half gear 19 is fixed on a crankshaft of the first motor 15 which is fixed at the bottom surface of the top plate 4.

In a preferred embodiment of the present invention, two sets of holding rods 17 are disposed in parallel with the rack bar 21, the two sets of holding rods 17 are disposed on both sides of the second ring gear 20, the sleeve 16 slidably fitted on the holding rods 17 is fixed to the outside of the second ring gear 20, the end of the holding rods 17 is fixedly connected to the first connecting plate 18, and the first connecting plate 18 is fixed to the top end surface of the top plate 4.

As a technical optimization scheme of the present invention, a moving assembly for moving a delivery pipe 31 relative to a first delivery pipe 12 is further installed on one side of the first delivery pipe 12, a limiting fixture block 32 is fixed on an outer wall of a bottom end of the delivery pipe 31 inserted into the first delivery pipe 12, a sliding chute 33 adapted to the limiting fixture block 32 is opened inside the first delivery pipe 12, a vertical fixing pipe 11 is further installed between the delivery pipe 31 and the first delivery pipe 8, a plurality of groups of vertical insertion rods 29 are fixed at a top end of the delivery pipe 31, a slot 30 for inserting the plurality of groups of insertion rods 29 is opened at a bottom end of the fixing pipe 11, a conical cover 28 is further fixed at a top end of the fixing pipe 11, and the conical cover 28 is fixedly connected with the bottom end of the first delivery pipe 8 through a vertical connecting rod 27.

As a technical optimization scheme of the invention, the moving assembly comprises a second connecting plate 34, a threaded sleeve 35, a threaded rod 36, a fourth gear 41, a third gear 40, a second rotating shaft 39 and a second motor 37, the threaded rod 36 is arranged inside the delivery pipe 31 and the first discharge pipe 12 along the axial lead direction of the delivery pipe 31 and the first discharge pipe 12, the bottom section of the threaded rod 36 is rotatably connected to a connecting seat fixed inside the first discharge pipe 12 through a bearing, the threaded sleeve 35 is screwed on the threaded rod 36, the second connecting plate 34 fixedly connected with the threaded sleeve 35 is fixed inside the delivery pipe 31, the fourth gear 41 is fixed on the bottom end of the threaded rod 36, the third gear 40 is meshed with the fourth gear 41 and is arranged, the third gear 40 is fixed on one end of the horizontal second rotating shaft 39, the middle section of the second rotating shaft 39 is rotatably connected with the side wall of the first discharge pipe 12 through a bearing, the second shaft 39 is located outside the first discharge pipe 12, and has one end fixedly connected with the crankshaft of the second motor 37, the second motor 37 is fixed on the fixed mounting plate 38 at the bottom of the collecting bucket 2, and the bottom section of the threaded rod 36 above the fourth gear 41 is also fixed with a protective cover 42.

When the soybean screening machine is used, soybeans to be screened are put into the input hopper 5, the soybeans fall into the containing component through the first feeding pipe 8, namely the soybeans are positioned on the screening hopper 3, then the first motor 15 is started to drive the half gear 19 to rotate, so that the second gear ring 20 reciprocates and linearly moves outside the half gear 19, the gear rod 21 fixed at the end part of the second gear ring 20 drives the first gear 23 meshed with the gear rod 21 to reciprocate and rotate, the second gear 22 fixedly connected with the first gear 23 through the first rotating shaft 14 reciprocates along with the gear rod, the first gear ring 7 meshed with the second gear 22 is fixed on the top surface of the upper cover 6 in the containing component, namely the reciprocating rotation of the containing component is realized, the soybeans on the screening hopper 3 are thrown upwards by centrifugal force, the screening of the soybeans is realized, the soybeans with smaller grain size fall into the collecting hopper 2 through the screening hopper 3 and are discharged through the second discharge pipe 13, when no soybeans are discharged from the second discharge pipe 13, the first motor 15 is stopped to start the second motor 37, the second motor 37 drives the second rotating shaft 39 to rotate, the third gear 40 fixed at one end of the second rotating shaft 39 rotates, the fourth gear 41 meshed with the third gear 40 rotates along with the third gear 40, the fourth gear 41 is fixed at one end of the threaded rod 36 and immediately drives the threaded rod 36 to rotate, the threaded pipe sleeve 35 moves on the threaded rod 36, the threaded pipe sleeve 35 moves up and down on the threaded rod 36, the delivery pipe 31 indirectly drives the delivery pipe 31 to move down, an opening above the delivery pipe 31 is exposed, soybeans in the screening hopper 3 can be discharged through the delivery pipe 31 and the first delivery pipe 12, and when screening needs to be carried out again, the delivery pipe 31 is moved up to enable the top end of the delivery pipe 31 to be in butt joint with the fixed pipe 11.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.