Cleaning screen surface material distribution improving device for harvester and threshing and cleaning system

Abstract

The invention discloses a sorting screen surface material distribution improving device for a harvester. The sorting screen surface material distribution improving device is provided with two opposite airflow outlets formed in the left side and the right side of a sorting screen surface. The airflow outlet is in a long strip shape extending front and back, the position of the airflow outlet is higher than the cleaning screen face, and the blowing direction of the airflow outlet is the left-right direction. And the airflow outlet is positioned on the front half side of the cleaning screen surface. The airflow outlets blowing air oppositely are formed in the left side and the right side of the cleaning screen face, opposite airflow blown out of the two airflow outlets can blow materials on the left side and the right side of the screen face to the middle of the screen face, materials gathered in the middle of the screen face can be spread to the left side and the right side through the vibration effect of the cleaning screen, and the process is repeated. By means of the structure, circulating motion of materials in the left-right direction can be promoted, namely the materials are turned over in another dimension, the distribution state of the materials on the screen face can be improved, separation of grains in the materials can be accelerated, and the screening efficiency and the processing capacity are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of threshed material cleaning for harvesters, and particularly to a device for improving the material distribution on a cleaning sieve surface of a harvester and a threshing and cleaning system. Background Art

[0002] The Yangtze River Basin is an important grain and oil production area in China. As the main planting mode in this area, the rice (wheat)-oil rotation mode has small plots, poor road passability, and large models sink severely in the fields during the waterlogged and dry rotation mode, with poor passability. Therefore, the grain harvesting equipment in the Yangtze River Basin of China will still mainly rely on tracked medium and small-sized equipment. With the gradual expansion of the scale of agricultural production operation, higher requirements are inevitably put forward for the operation efficiency and quality of harvesting operation equipment. Under the condition of limited structure of small models, it is difficult to apply the method of improving the operation performance and quality by increasing the structure of the threshing system in actual production. Therefore, maximizing the performance of single threshing and cleaning and realizing high-efficiency and high-quality operation are the key research contents of the threshing system in the future.

[0003] In the prior art, a typical harvester cleaning device is shown in Patent CN 205584833 U. This cleaning sieve can make the grains or rapeseed kernels of grains or rapeseed fall through the sieve from the straw by vibrating the sieve surface and arranging an air flow device below the sieve surface, and blow out the light impurities from the sieve surface. In the actual use process of this cleaning device, the threshed materials in the threshing device are restricted by forces such as centrifugal force and blocked by the left and right sides of the threshing device. The threshed materials are unevenly distributed left and right on the sieve surface, mainly manifested as more materials on the left and right sides than in the middle part of the sieve surface. In this way, a situation where there is more material on both sides and less material in the middle will be formed. The part with more accumulation results in a low through-sieve rate of the kernels and low cleaning efficiency and weak cleaning ability, and the position with less material fails to fully utilize the material separation ability of the cleaning sieve. Summary of the Invention

[0004] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides a device for improving the material distribution on a cleaning sieve surface of a harvester and a threshing and cleaning system, which can improve the cleaning efficiency and processing capacity and optimize the material distribution on the sieve surface.

[0005] Technical Solution: To achieve the above object, the device for improving the material distribution on a cleaning sieve surface of the harvester of the present invention has two opposed air flow outlets disposed on the left and right sides of the cleaning sieve surface, and the materials on the cleaning sieve surface move from front to back when the cleaning device is operating; the air flow outlets are in a long strip shape extending in the front-rear direction, their positions are higher than the cleaning sieve surface, and their blowing directions are in the left-right direction; the air flow outlets are located on the front half side of the cleaning sieve surface.

[0006] Further, the air flow outlet is formed on the horn component and is located at the wide end of the horn component, that is, the wide end is strip-shaped; the wide end of the horn component is formed with densely arranged air outlet holes; the narrow end of the horn component is connected to the fan.

[0007] Further, the air flow velocity blown out by the air outlet holes is 6 - 10 m / s.

[0008] Further, the horn component and the fan are connected through a pipeline, and the pipeline is a rigid pipeline or a flexible pipeline, preferably a flexible pipeline, so that the horn component and the fan can be conveniently installed separately.

[0009] Further, the wide end of the horn component is arranged closely against the side of the cleaning sieve surface, without blocking the material from falling from the threshing device to the sieve surface and moving on the sieve surface, and has little interference with the falling of the material.

[0010] Further, the front-back position, height, and pitch angle of the horn component can be adjusted. In this way, the position of the horn component can be adjusted as needed to improve the distribution effect of the material on the sieve surface.

[0011] A threshing and cleaning system for a harvester, which includes a threshing device and a cleaning sieve arranged vertically; the threshing device includes a threshing cylinder and a concave sieve, and the extending direction of the rotating shaft of the threshing cylinder is the front-back direction; it also includes the above-mentioned device for improving the distribution of the material on the cleaning sieve surface; the air flow outlet is close to the feeding end of the concave sieve.

[0012] Beneficial effects: The device for improving the distribution of the material on the cleaning sieve surface and the threshing and cleaning system of the present invention have the following beneficial effects:

[0013] (1) By arranging air flow outlets blowing in opposite directions on the left and right sides of the cleaning sieve surface, the opposite air flows blown out by the two air flow outlets can blow the materials on the left and right sides of the sieve surface towards the middle of the sieve surface, and the vibration of the cleaning sieve can make the materials gathered in the middle of the sieve surface spread out towards the left and right sides. In this way, through repeated cycles, the cyclic movement of the materials in the left-right direction can be promoted, that is, another dimension of turning effect is generated on the materials, which can promote the separation of the grains therein, and the screening efficiency and processing capacity are greatly improved.

[0014] (2) Since the air flow outlets are arranged in the first half of the cleaning sieve surface, only the distribution state of the materials in the first half of the sieve surface is changed. The materials in the second half of the sieve surface can be fully spread out to a uniform distribution state, making use of the grains that have not fallen through the sieve, and making the materials discharged from the rear side of the sieve surface more regular and convenient for subsequent processing.

[0015] (3) The air flow generated by the fan is diffused through the horn component and then distributed to the strip-shaped air flow outlets, and blown out through each air hole, which can form hundreds of air flows with relatively high flow rates, while ensuring the intensity and distribution breadth of the air flow.

[0016] (4) The separate installation of the horn component and the fan and their connection through pipes is conducive to improving the compactness of the machine tool, making the structure compact and occupying less space, and is suitable for the transformation of the harvester. Description of the Drawings

[0017] Figure 1 It is a top view combined structure diagram of the device for improving the material distribution on the cleaning sieve surface of the harvester and the cleaning sieve;

[0018] Figure 2 It is a three-dimensional combined structure diagram of the device for improving the material distribution on the cleaning sieve surface of the harvester and the cleaning sieve;

[0019] Figure 3 It is a side view combined structure diagram of the device for improving the material distribution on the cleaning sieve surface of the harvester and the cleaning sieve;

[0020] Figure 4 It is a structure diagram of the horn layout;

[0021] Figure 5 It is a side view structure diagram of the threshing and cleaning device;

[0022] Figure 6 It is a front view structure diagram of the threshing and cleaning device.

[0023] In the figure: 1 - horn component; 11 - air hole; 2 - fan; 3 - pipe; a - air flow outlet; 4 - threshing device; 41 - threshing cylinder; 42 - concave sieve; 5 - cleaning sieve. Detailed Embodiments

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] As Figures 1 to 3 shown in the device for improving the material distribution on the cleaning sieve surface of the harvester, it has two opposed air flow outlets a placed on the left and right sides of the cleaning sieve surface, and the material on the cleaning sieve surface moves from front to back when the cleaning device is running; the air flow outlet a is in a strip shape extending from front to back, its position is higher than the cleaning sieve surface, and its blowing direction is in the left - right direction; the air flow outlet a is located in the front half of the cleaning sieve surface.

[0026] In the present invention, by providing air flow outlets a that blow air towards each other on the left and right sides of the cleaning sieve surface, the counter-directional air flows blown out from the two air flow outlets a can blow the materials on the left and right sides of the sieve surface towards the middle of the sieve surface. Moreover, the vibration of the cleaning sieve in the left and right directions can make the materials gathered in the middle of the sieve surface spread out towards the left and right sides. In this way, through repeated cycles, it can promote the circular movement of the materials in the left and right directions, that is, it generates a turning effect on the materials in another dimension, which can promote the falling of the grains therein, and greatly improve the screening efficiency and processing capacity.

[0027] Since the air flow outlet a is arranged in the first half of the cleaning sieve surface, it only changes the distribution state of the materials in the first half of the sieve surface. The materials in the second half of the sieve surface can be fully spread out to a uniform distribution state, enabling the grains that have not yet fallen to pass through the sieve, and making the materials discharged from the rear side of the sieve surface more regular and convenient for subsequent processing.

[0028] Specifically, the air flow outlet a is formed on the horn component 1 and is located at the wide end of the horn component 1, that is, the wide end is strip-shaped; as Figure 4 shown, the wide end of the horn component 1 is formed with densely arranged air holes 11; the narrow end of the horn component 1 is connected to the fan 2. The air flow velocity blown out from the air holes 11 is 6 - 10 m / s.

[0029] The horn component 1 and the fan 2 are connected through a pipeline 3. The pipeline 3 is a rigid pipeline or a flexible pipeline, preferably a flexible pipeline, so that the horn component 1 and the fan 2 can be conveniently installed separately. The way of separately installing the horn component 1 and the fan 2 and connecting them through the pipeline 3 is beneficial to improving the compactness of the machine tool, making the structure compact and occupying less space, and is suitable for the transformation of the harvester.

[0030] The air flow generated by the fan 2 is diffused through the horn component 1 and then distributed to the strip-shaped layout of the air flow outlet a, and blown out through the respective air holes 11, which can form hundreds of air flows with a relatively high flow velocity, while ensuring the intensity of the air flow and the breadth of the distribution.

[0031] The wide end of the horn component 1 is arranged closely against the side of the cleaning sieve surface, without blocking the materials from falling from the threshing device to the sieve surface and moving on the sieve surface, and has little interference with the falling of the materials. In addition, the front and rear positions, height, and pitch angle of the horn component 1 can be adjusted. When adjusting the pitch angle, the horn component 1 rotates around the rotating shaft extending in the front and rear directions. In this way, the position of the horn component 1 can be adjusted as needed to improve the distribution effect of the materials on the sieve surface.

[0032] As Figure 5 And Figure 6As shown in the figure, the present invention also provides a threshing and cleaning system for a harvester, which includes a threshing device 4 and a cleaning screen 5 arranged vertically; the threshing device 4 includes a threshing cylinder 41 and a concave screen 42, and the extending direction of the rotating shaft of the threshing cylinder 41 is in the front-back direction; it also includes the above-mentioned device for improving the material distribution on the cleaning screen surface; the air outlet a is close to the feeding end (i.e., the front end) of the concave screen 42, and the feeding end is located at the front end of the cleaning screen 5. Since the amount of discharged materials at the feeding end is much more than that at the position close to the discharging end, arranging the horn component 1 at a position close to the feeding end can better achieve the purpose of converging the materials towards the middle, improving the material layout, laterally turning the materials to improve the cleaning efficiency.

[0033] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Device for improving the material distribution on the cleaning sieve surface of a harvester, characterized in that: It has two opposed air outlets (a) placed on the left and right sides of the cleaning sieve surface; the air outlets (a) are in the shape of long strips extending front and back, their positions are higher than the cleaning sieve surface, and their blowing directions are in the left-right direction; the air outlets (a) are located on the front half side of the cleaning sieve surface.

2. The cleaning sieve surface material distribution improvement device for a harvester according to claim 1, characterized in that The air outlets (a) are formed on the horn component (1) and are located at the wide end of the horn component (1); the wide end of the horn component (1) is formed with densely arranged air holes (11); the narrow end of the horn component (1) is connected to the fan (2).

3. The cleaning sieve surface material distribution improvement device for a harvester according to claim 2, wherein, The air flow velocity blown out by the air holes (11) is 6 - 10 m / s.

4. The cleaning sieve surface material distribution improvement device for a harvester according to claim 2, wherein, The horn component (1) and the fan (2) are connected through a pipeline (3), and the pipeline (3) is a rigid pipeline or a flexible pipeline, preferably a flexible pipeline.

5. The improvement device for the material distribution of the cleaning sieve surface of the harvester according to claim 2, characterized in that, The wide end of the horn component (1) is arranged closely against the side edge of the cleaning sieve surface.

6. The cleaning sieve surface material distribution improvement device for a harvester according to claim 2, wherein, The front-back position, height, and pitch angle of the horn component (1) can be adjusted.

7. A threshing and cleaning system for a harvester, which comprises a threshing device (4) and a cleaning sieve (5) arranged vertically; the threshing device (4) comprises a threshing cylinder (41) and a concave sieve (42), and the extending direction of the rotating shaft of the threshing cylinder (41) is the front-rear direction; characterized in that, It further includes the device for improving the material distribution on the cleaning sieve surface according to any one of claims 1 - 6; the air outlet (a) is close to the feeding end of the concave sieve (42).

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