CN115176603A

CN115176603A - Cleaning screen surface material uniform flow guide mechanism

Info

Publication number: CN115176603A
Application number: CN202211017576.XA
Authority: CN
Inventors: 江涛; 沐森林; 关卓怀; 王刚; 李海同; 张敏; 吴崇友; 陈旭; 金梅
Original assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Current assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2022-10-14
Anticipated expiration: 2042-08-23
Also published as: CN115176603B

Abstract

The invention discloses a cleaning screen surface even-dispersion flow guide mechanism, wherein a cleaning screen is provided with a vibrating screen body, and the flow guide mechanism is positioned above the vibrating screen body; the flow guide mechanism comprises a plurality of flow guide wheels which are arranged in a left-right direction in an array manner; the guide wheel comprises a wheel core and guide rods which are fixed on the periphery of the wheel core in a circumferential array; the inducer actively rotates about a first central axis while the first central axis rotates about a second central axis that intersects the first central axis and is not perpendicular to the first central axis. According to the cleaning screen surface uniform flow guide mechanism, the flow guide wheel with the first central shaft capable of rotating in an inclined mode is arranged, so that the flow guide rod of the flow guide wheel performs spatial compound motion to assist materials to move backwards, high-humidity materials are prevented from being deposited on the screen surface, collision among the materials is increased, wrapping of grains, horned fruit shells and other sundries is reduced, the looseness and uniformity of the materials are improved, the screening pressure is reduced, and the grain screening probability is improved. Because the guide rod performs the spatial compound motion, the guide rod can intervene materials in a wider range, and the layout density of the guide wheel can be reduced.

Description

Cleaning screen surface material uniform flow guide mechanism

Technical Field

The invention relates to the technical field of cleaning of agricultural materials, in particular to a uniformly-dispersed flow guide mechanism for a cleaning screen surface.

Background

After agricultural products are harvested and threshed, materials need to be cleaned, a typical cleaning device is disclosed in the prior patent CN205071728U, in the operation process, the cleaned materials fall on a screen surface, the screen surface vibrates regularly, so that the materials move backwards along the screen surface from the front, in the movement process, grains in the materials are screened out, pass through the screen, fall below the screen surface and are carried away by a conveying mechanism, and impurities such as straws and the like finally fall out from the rear side of the screen surface due to the fact that the impurities cannot pass through the screen, so that the cleaning of the materials is achieved.

Above-mentioned cleaning plant is applicable to and cleans dry material, but because weather influence, many times will carry out the results to high wet crops, thresh and in time clean the high wet material that obtains after threshing, to the higher high wet material of moisture content, because it has stronger adhesive force and material itself heavier, therefore the material motion difficulty on the sifter, simultaneously along with the increase of feeding volume, the material volume risees, seed grain and debris are difficult to separate, cause to wrap up in and hold by oneself, cleaning loss has been increased, cleaning effect reduces by a wide margin.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a cleaning screen surface material uniform flow guide mechanism which can uniformly disperse high-humidity materials on the screen surface of a cleaning screen when the cleaning screen works.

The technical scheme is as follows: in order to achieve the purpose, the cleaning screen surface material flow guide mechanism is characterized in that a cleaning screen is provided with a vibrating screen body, the flow guide mechanism is positioned above the vibrating screen body, and a screened material moves from front to back on the vibrating screen body; the flow guide mechanism comprises a plurality of flow guide wheels which are arranged in a left-right direction in an array manner;

the guide wheel comprises a wheel core and guide rods which are fixed on the periphery of the wheel core in a circumferential array;

the guide wheel actively rotates around a first central shaft, and simultaneously the first central shaft rotates around a second central shaft which is intersected with the first central shaft and is not perpendicular to the first central shaft.

Further, the flow guide mechanism further comprises a rotary drum and a driving joint arranged in the rotary drum;

the guide wheel is rotatably arranged on the driving joint, a central shaft of the guide wheel, which rotates relative to the driving joint, is the first central shaft, the driving joint rotates around the second central shaft, and the second central shaft extends along the left-right direction;

the wheel core is arranged in the rotary drum; the rotary drum is provided with strip-shaped holes corresponding to the guide rods, and the strip-shaped holes extend along the axial direction of the rotary drum; each guide rod penetrates through the corresponding strip-shaped hole and extends out of the rotary drum;

the rotary drum and the driving joint respectively rotate actively, and the rotating speed and/or the rotating direction of the rotary drum and the driving joint are different.

Furthermore, the driving joint is provided with a chute which is obliquely arranged, and a roller is installed in the guide wheel; the roller is disposed in the chute and moves along the chute.

Further, the guide rod is provided with two rod sections, the included angle between the two rod sections is an obtuse angle, and the rod section connected with the wheel core extends along the radial direction of the wheel core.

Further, the rotary drum and the driving joint are driven to operate by a first driving wheel and a second driving wheel respectively.

Has the beneficial effects that: according to the cleaning screen surface uniform flow guide mechanism, the flow guide wheel with the first central shaft capable of swinging back and forth is arranged, so that the flow guide rod of the flow guide wheel performs spatial compound motion to assist materials to move backwards, high-humidity materials are prevented from being deposited on the screen surface, collision among the materials is increased, wrapping of grains, horned fruit shells and other sundries is reduced, the looseness and uniformity of the materials are improved, the screening pressure is reduced, and the grain screening probability is improved. Because the guide rod performs the spatial compound motion, the guide rod can intervene materials in a wider range, and the layout density of the guide wheel can be reduced.

Drawings

FIG. 1 is a block diagram of a sorting screen;

FIG. 2 is a view showing the configuration of the guide mechanism;

FIG. 3 is a cross-sectional view of the flow directing mechanism;

FIG. 4 is a schematic diagram of the relationship between the flow guide mechanism and the coordinate system O-XYZ;

FIG. 5 is a block diagram of a drive joint;

fig. 6 is a structural view of the inducer.

In the figure: 1-vibrating the screen body; 2-a flow guide mechanism; 21-a guide wheel; 21 a-a wheel core; 21 b-a guide rod; 22-a rotating drum; 22 a-strip shaped holes; 23-a drive joint; 23 a-a chute; 24-a roller; 25-a first drive wheel; 26-a second drive wheel; a-a first central axis; b-a second central axis.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The cleaning screen as shown in fig. 1 is provided with a vibrating screen body 1, a flow guide mechanism 2 is positioned above the vibrating screen body 1, and screened materials move from front to back on the vibrating screen body 1; as shown in fig. 2 to 3, the guide mechanism 2 includes a plurality of guide wheels 21 mounted in an array in the left-right direction; the guide wheel 21 comprises a wheel core 21a and guide rods 21b which are fixed on the periphery of the wheel core 21a in a circumferential array manner; the guide wheel 21 actively rotates around the first central shaft a, the first central shaft a rotates around the second central shaft b which is intersected with the first central shaft a and not perpendicular to the first central shaft a, so that the guide rod 21b performs spatial compound motion, the guide rod 21b can intervene and guide the motion of materials on the vibrating screen body 1 to assist the backward motion of the materials, prevent high-humidity materials from being deposited on a screen surface, increase the collision among the materials, reduce the wrapping of seeds, horny shells and other sundries, improve the looseness and uniformity of the materials, reduce the screening pressure and improve the screening probability of the seeds.

Specifically, as shown in fig. 2-3, the diversion mechanism 2 further includes a rotating cylinder 22 and a driving joint 23 installed in the rotating cylinder 22; the guide wheel 21 is rotatably mounted on the driving joint 23, a central axis of the guide wheel relative to the driving joint 23 is the first central axis a, and the driving joint 23 rotates around the second central axis b; the second central axis b extends in the left-right direction; the wheel core 21a is disposed in the drum 22; the rotating drum 22 is provided with a strip-shaped hole 22a corresponding to each guide rod 21b, and the strip-shaped hole 22a extends along the axial direction of the rotating drum 22; each guide rod 21b passes through the corresponding strip-shaped hole 22a and extends out of the rotary drum 22; the drum 22 and the driving joint 23 are actively rotated, and driven by a first driving wheel 25 and a second driving wheel 26. And the rotational speed and/or rotational direction of both the drum 22 and the drive joint 23 are different.

For convenience of description, as shown in fig. 4, a coordinate system O-XYZ is established for the guide mechanism 2, in which the X axis coincides with the second central axis b, that is, is parallel to the left-right direction; the Z axis extends in the vertical direction; the Y axis is parallel to the front-rear direction, and the origin O is the intersection of the first central axis a and the second central axis b. The driving joint 23 and the drum 22 both rotate around the X axis, and since the first central axis a is inclined with respect to the second central axis b, when the driving joint 23 actively rotates, the first central axis a can rotate around the X axis (i.e. the second central axis b), and a surface swept by the first central axis a is a conical surface (as shown in fig. 4) with the origin O as a vertex; because the revolving drum 22 rotates actively and the diversion rod 21b passes through the strip-shaped hole 22a to make most of the entity outside the revolving drum 22, when the revolving drum 22 rotates, the diversion rod 21b acts on the diversion wheel 21 through the hole wall of the strip-shaped hole 22a to push the diversion wheel 21 to rotate relative to the driving joint 23, so that the diversion rod 21b can do spatial compound motion.

Because the guide rod 21b performs the spatial compound motion, the range of materials which can be acted by the guide rod is wider, and the layout density of the guide wheel 21 in the left and right directions can be reduced. Because the rotating speed and/or the rotating direction of the rotating cylinder 22 and the driving joint 23 are different, the frequency of the space compound motion of the guide rod 21b can be greatly improved.

As shown in fig. 5, the driving joint 23 has a chute 23a disposed obliquely, and as shown in fig. 6, a roller 24 is installed in the inducer 21; the roller 24 is disposed in the slide groove 23a and moves along the slide groove 23 a. With the above structure, the inducer 21 can move smoothly relative to the driving joint 23.

The guide rod 21b has two rod sections, and an included angle between the two rod sections is an obtuse angle, wherein the rod section connecting the wheel core 21a extends along the radial direction of the wheel core 21 a. When the inducer 21 rotates, the orientation of the turning part between two pole sections on the guide pole 21b is along the direction of motion of guide pole 21b, and in addition, guide pole 21b has elasticity, so, when the material piles up highly or runs into hard foreign matter on the screen surface, guide pole 21b can be along turning part bending deformation, so guide pole 21b has self-adaptation deformability, also can avoid guide pole 21b to run into hard matter and collide with the damage.

According to the cleaning screen surface uniform flow guide mechanism, the flow guide wheel with the first central shaft capable of swinging back and forth is arranged, so that the flow guide rod of the flow guide wheel performs spatial compound motion to assist materials to move backwards, high-humidity materials are prevented from being deposited on the screen surface, collision among the materials is increased, wrapping of grains, horned fruit shells and other sundries is reduced, the looseness and uniformity of the materials are improved, the screening pressure is reduced, and the grain screening probability is improved. Because the guide rod performs the spatial compound motion, the guide rod can intervene materials in a wider range, and the layout density of the guide wheel can be reduced.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A cleaning screen surface uniform flow guide mechanism is characterized in that a cleaning screen is provided with a vibrating screen body (1), a flow guide mechanism (2) is located above the vibrating screen body (1), and a screened material moves from front to back on the vibrating screen body (1); the air guide mechanism (2) is characterized by comprising a plurality of air guide wheels (21) which are arranged in a left-right direction in an array manner;

the guide wheel (21) comprises a wheel core (21 a) and guide rods (21 b) which are fixed on the periphery of the wheel core (21 a) in a circumferential array;

the inducer (21) is actively rotated about a first central axis (a) while the first central axis (a) is rotated about a second central axis (b) intersecting it and not perpendicular to each other.

2. A cleaning screen surface homogenizing and guiding mechanism according to claim 1, characterized in that the guiding mechanism (2) further comprises a drum (22) and a driving joint (23) installed in the drum (22);

the guide wheel (21) is rotatably mounted on the driving joint (23), the central axis of the guide wheel rotating relative to the driving joint (23) is the first central axis (a), the driving joint (23) rotates around the second central axis (b), and the second central axis (b) extends along the left-right direction;

the wheel core (21 a) is disposed within the drum (22); the rotary drum (22) is provided with a strip-shaped hole (22 a) corresponding to each guide rod (21 b), and the strip-shaped holes (22 a) extend along the axial direction of the rotary drum (22); each guide rod (21 b) passes through the corresponding strip-shaped hole (22 a) and extends out of the rotary drum (22);

the rotary drum (22) and the driving joint (23) respectively rotate actively, and the rotating speeds and/or the rotating directions of the rotary drum and the driving joint are different.

3. A cleaning screen surface evenly-dispersing guide mechanism according to claim 2, characterized in that the driving joint (23) is provided with a chute (23 a) which is obliquely arranged, and a roller (24) is arranged in the guide wheel (21); the roller (24) is disposed in the slide groove (23 a) and moves along the slide groove (23 a).

4. A cleaning screen surface evening and guiding mechanism according to claim 3, characterized in that said guiding bar (21 b) has two bar sections, the included angle between the two bar sections being an obtuse angle, wherein the bar section connecting said wheel core (21 a) extends in the radial direction of said wheel core (21 a).

5. A cleaning screen surface homogenizing and guiding mechanism according to claim 2, characterized in that the drum (22) and the driving joint (23) are driven to run by a first driving wheel (25) and a second driving wheel (26), respectively.