Corn ear flexible collision type threshing device driven by vortex airflow

Abstract

The invention relates to a corn ear flexible collision type threshing device driven by vortex airflow, which comprises a feeding device, a vortex airflow threshing device and a high-pressure vortex fan, and is characterized in that corn ears are fed from the top end of a feeding circular pipe and slide into a vertical threshing cylinder through a slope base and a bottom end opening; high-pressure large-flow airflow generated by the high-pressure vortex fan is blown into the vertical threshing cylinder to form vortex airflow, and the vortex airflow drives corn ears to move in the vertical threshing cylinder and collide with flexible protrusions arranged on the inner wall of the vertical threshing cylinder and the outer wall of the feeding round pipe to achieve the threshing effect. The whole device is simple in structure, high in threshing efficiency, less in grain damage and capable of effectively achieving threshing of high-water-content corn.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of corn threshing, in particular to a vortex air flow driven flexible impact type corn ear threshing device. BACKGROUND

[0002] As a high-yield grain crop in China, the integrity of harvested corn kernels is directly related to food security and the value of the industrial chain. In the feed industry, corn accounts for a high proportion, and the requirement for breakage rate is strict, while the ethanol and other industrial processes require the integrity of the starch structure. If the breakage rate of harvested corn kernels is high, it is easy to cause mildew due to water penetration during storage, and even cause the entire batch of corn to spoil, losing economic value.

[0003] The current threshing of high-moisture corn is still a global problem. Pure mechanical threshing devices are prone to cause flexible kernels to crack due to extrusion. Traditional mechanical threshing has a high breakage rate of 8-15% for corn kernels with a moisture content of more than 22%, mainly due to the stress cracks caused by rigid impact. Although flexible impact threshing can reduce the risk of kernel breakage, the technology is not yet mature, and the threshing effect and efficiency are poor. High-moisture corn threshing needs to consider both threshing efficiency and low damage, which has become the research focus of high-moisture corn threshing at home and abroad. SUMMARY

[0004] In view of the defects of the prior art, the present application provides a vortex air flow driven flexible impact type corn ear threshing device, which is simple, compact and reasonable in structure. The corn is threshed by the combined action of vortex air flow and flexible mechanical impact. For high-moisture corn, it can effectively reduce the damage and consider the threshing efficiency.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is: a corn ear flexible collision type threshing device driven by vortex airflow, comprising a feeding device, a vortex airflow threshing device, a high-pressure vortex fan and a rack, the vortex airflow threshing device and the high-pressure vortex fan are respectively installed on the rack, the feeding device comprises a feeding circular pipe, an inclined base and flexible protrusions, the inclined base is arranged at the bottom of the feeding circular pipe, the side wall of the feeding circular pipe is provided with a bottom end opening, the bottom end opening is located at the low side of the inclined base, the outer wall of the feeding circular pipe is provided with flexible protrusions arranged in a streamline shape, the vortex airflow threshing device comprises a vertical threshing cylinder, a threshing cylinder arc base and flexible protrusions, the threshing cylinder arc base is installed at the bottom of the vertical threshing cylinder, the center of the threshing cylinder arc base is provided with a mounting hole, the feeding circular pipe is inserted into the mounting hole and arranged coaxially with the vertical threshing cylinder, the inner wall of the vertical threshing cylinder is provided with flexible protrusions arranged in a streamline shape, the lower end of the vertical threshing cylinder is provided with an air inlet, the upper end is provided with a discharge port and a discharge port top cover, the air outlet of the high-pressure vortex fan is connected with the air inlet of the vertical threshing cylinder through a pipeline, the corn ear is fed into the vertical threshing cylinder through the top end of the feeding circular pipe, the inclined base and the bottom end opening, the high-pressure vortex fan generates high-pressure and high-flow airflow which blows into the vertical threshing cylinder to form vortex airflow, the vortex airflow drives the corn ear to move in the vertical threshing cylinder and collides with the flexible protrusions arranged on the inner wall of the vertical threshing cylinder and the outer wall of the feeding circular pipe to achieve the effect of threshing.

[0006] Further, the bottom of the inclined base is flush with the bottom of the vertical threshing cylinder, and the vertex of the inclined surface of the inclined base is on the center line of the unopened part of the feeding circular pipe.

[0007] Further, the flexible protrusions arranged on the outer wall of the feeding circular pipe are arranged along a spiral line, and the direction of the spiral line is consistent with the direction of the vortex airflow.

[0008] Further, the flexible protrusions arranged on the inner wall of the vertical threshing cylinder are arranged in two ways, the first way is to be arranged spirally from the air inlet to the discharge port, and the spiral direction is consistent with the direction of the vortex airflow, and the second way is to uniformly arrange a plurality of flexible protrusions on the inner wall circumferential surface of the middle section of the vertical threshing cylinder, for increasing the mechanical impact degree of the corn ear.

[0009] Further, in the second arrangement way, the flexible protrusions are uniformly arranged on the circumferential direction of the inner wall of the vertical threshing cylinder at intervals of 45°.

[0010] Further, the air inlet of the vertical threshing cylinder is arranged on the tangent line of the vertical threshing cylinder to ensure that the airflow enters tangentially.

[0011] Further, the height of the air outlet of the high-pressure vortex fan is consistent with the height of the air inlet of the vertical threshing cylinder.

[0012] Further, the upper surface of the arc base of the threshing cylinder is a slope or an arc surface with one side higher and the other side lower, and the highest point of the slope or the arc surface is flush with the center of the air inlet.

[0013] Further, the vortex airflow threshing device is installed on the rack through the threshing cylinder support plate, the air pipe flange and the threshing cylinder fixing plate, the threshing cylinder support plate is fixed on the rack, the bottom of the vertical threshing cylinder is placed on the threshing cylinder support plate and connected with the threshing cylinder support plate through the air pipe flange, the threshing cylinder fixing plate is sleeved outside the middle section of the vertical threshing cylinder, and the threshing cylinder fixing plate is installed in the middle part of the rack through bolts, thereby supporting and fixing the vertical threshing cylinder.

[0014] Further, the flexible protrusions on the feeding circular pipe and the vertical threshing cylinder are rubber protrusions.

[0015] Beneficial effects: the present application designs a vortex airflow driven corn ear flexible collision type threshing device, the vortex airflow threshing device is provided with a vertical threshing cylinder and is connected with a high-pressure vortex fan at the bottom to realize tangential air inlet, high-pressure vortex airflow is generated in the vertical threshing cylinder, at the same time, the feeding circular pipe is coaxially arranged and fixed inside the vertical threshing cylinder, so as to divide an annular threshing space in the threshing cylinder, which is matched with the vortex airflow, and flexible protrusions in a streamline arrangement are arranged on the outer wall of the feeding circular pipe and the inner wall of the vertical threshing cylinder, thereby, after the corn ear is fed, the corn ear spirally rises in the threshing cylinder under the action of the high-pressure vortex airflow, and can collide and rub with the flexible protrusions and the wall surface on both sides of the annular threshing space, so as to increase the impact and improve the threshing efficiency, and the corn is threshed through the combined action of the vortex airflow and the flexible collision.

[0016] The present application generates vortex airflow in the threshing cylinder through the high-pressure vortex fan, drives the corn to spirally rise in the annular space in the threshing cylinder through the vortex airflow, and designs flexible protrusions in a streamline arrangement on the outer wall of the feeding circular pipe and the inner wall of the threshing cylinder according to the movement law of the corn ear, so as to increase the corn collision threshing effect and overcome the problem of low threshing efficiency of the traditional flexible threshing mode, and the vortex airflow and the flexible protrusions both form a flexible effect on the corn kernels, so as to reduce the kernel breakage problem caused by the traditional mechanical threshing, the threshing equipment of the present application can guarantee good threshing effect only through the vortex airflow and the flexible collision through the ingenious structure design, is simple in structure and convenient to use, can guarantee high threshing efficiency, can reduce kernel breakage of the corn in the threshing process, and can effectively solve the threshing problem of the corn with high water content. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the structure of the vortex airflow threshing module; Figure 3Another angle structural diagram of the vortex airflow threshing module; Figure 4 Structural diagram of the feeding device; Figure 5 Structural diagram of the discharge port top cover; Figure 6 The installation position diagram of the feeding pipe in the vertical threshing cylinder.

[0018] The figure mark: 1, frame, 2, feeding pipe, 3, discharge port top cover, 4, vertical threshing cylinder, 5, threshing cylinder fixing plate, 6, threshing cylinder support plate, 7, air pipe flange, 8, high pressure vortex fan, 9, fan support plate, 10, fan support, 11, rubber protrusion, 12, threshing cylinder arc base, 13, inclined base, 14, mounting hole, 15, air inlet, 16, discharge port. DETAILED DESCRIPTION

[0019] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] As Figures 1-6 shown, a vortex airflow driven corn ear flexible impact threshing device mainly consists of a frame 1, a vortex airflow threshing device, a feeding device and a high pressure vortex fan 8. The vortex airflow threshing device includes a vertical threshing cylinder 4, a threshing cylinder arc base 12 and a rubber protrusion 11. The feeding device includes a feeding pipe 2, an inclined base 13 and a rubber protrusion 11. The air outlet of the high pressure vortex fan 8 is connected with the air inlet 15 of the vertical threshing cylinder 4. The airflow blown in by the high pressure vortex fan 8 forms a vortex airflow in the threshing cylinder. The vortex airflow drives the corn ear to move in the threshing cylinder, collides with the rubber protrusions 11 on the vertical threshing cylinder 4 and the feeding pipe 2 to achieve the threshing effect, and can realize low-loss threshing of corn with high water content.

[0021] The frame 1 is the main support structure of the threshing device. In this embodiment, the frame 1 has two parts: a first frame and a second frame. Both frames are built by aluminum profiles. The two frames are placed 60 mm apart and serve as the bearing mechanism of the vortex airflow threshing device and the high pressure vortex fan 8 respectively.

[0022] The feeding device comprises a feeding pipe 2, an inclined base 13 and rubber protrusions 11, the center of the arc base 12 of the cylinder is provided with a mounting hole 14, the feeding pipe 2 is inserted into the mounting hole 14 and arranged coaxially with the vertical cylinder 4, the inclined base 13 is arranged at the bottom of the feeding pipe 2, the bottom surface of the inclined base 13 is flush with the bottom of the vertical cylinder 4, the side wall of the bottom end of the feeding pipe 2 is provided with a bottom end opening, the bottom end opening is located at the low side of the inclined base 13, the highest point of the inclined surface of the inclined base 13 is on the middle line of the unopened part of the feeding pipe 2, the corn is directly fed from the top end of the feeding pipe 2, and the corn slides out from the bottom end opening after reaching the inclined base 13 and enters the vertical cylinder 4.

[0023] As shown in Figure 4 , the outer wall of the feeding pipe 2 is provided with the rubber protrusions 11 arranged in a streamline manner, specifically, the rubber protrusions 11 are arranged along a spiral line on the outer wall of the feeding pipe 2, and the direction of the spiral line is consistent with the movement direction of the corn ears driven by the vortex airflow; the feeding device is mainly used for feeding the corn ears into the vertical cylinder 4, and the rubber protrusions 11 can increase the mechanical impact times of the corn ears and accelerate the threshing of the corn ears.

[0024] The vortex airflow threshing device is the main working area of the corn threshing, which comprises the vertical cylinder 4, the arc base 12 of the cylinder and the rubber protrusions 11; the arc base 12 of the cylinder is installed at the bottom of the vertical cylinder 4, and the rubber protrusions 11 are arranged in a streamline manner on the inner wall of the vertical cylinder 4; the lower end of the vertical cylinder 4 is provided with an air inlet 15, and the upper end is provided with a discharge port 16 and a discharge port top cover 3.

[0025] As shown in Figures 2-3 , the air inlet 15 of the vertical cylinder 4 is arranged on the tangent line of the vertical cylinder 4 to ensure that the airflow enters the vertical cylinder 4 tangentially, the arc base 12 of the cylinder is installed at the bottom of the vertical cylinder 4, the upper surface of the arc base 12 of the cylinder is an inclined surface or an arc surface with one side high and the other side low, and the highest point of the inclined surface or the arc surface is flush with the midpoint of the air inlet 15, so that the airflow entering from the air inlet 15 can better blow up the corn ears and achieve better threshing effect; when multiple corn ears are at the bottom of the cylinder, the arc base 12 of the cylinder with one side high and the other side low makes each corn ear have a certain height difference and not on the same plane, so there is no situation that multiple corns are stuck together during the threshing process; since the airflow enters the vertical cylinder 4 tangentially, the central area of the vertical cylinder 4 is subjected to smaller pressure of the airflow, so the mounting hole 14 at the center of the arc base 12 of the cylinder can support and fix the feeding pipe 2.

[0026] The inner wall of the vertical cylinder 4 is provided with streamlined rubber protrusions 11, which do not change the flow field in the vertical cylinder 4. The rubber protrusions 11 in the vertical cylinder 4 have two arrangement modes. The first mode is to be arranged in a spiral from the air inlet 15 to the discharge port 16, which can guide the corn ears and also has a mechanical impact. The second mode is to be evenly arranged at intervals of 45° in the circumferential direction of the middle section of the inner wall of the vertical cylinder 4, which can increase the mechanical impact of the corn ears. In the second mode, the interval of 45° is the preferred parameter of the better threshing effect in the embodiment, but it is not a limitation to the present application, and other numbers and intervals can be selected according to the actual situation.

[0027] The vortex airflow threshing device is supported and fixed by the first rack, as shown in Figure 2 The vortex airflow threshing device is installed on the rack 1 through the cylinder support plate 6, the flange 7 and the cylinder fixing plate 5. The cylinder support plate 6 is fixed on the rack 1 by bolt connection. The bottom of the vertical cylinder 4 is placed on the cylinder support plate 6. The flange 7 is sleeved on the bottom of the vertical cylinder 4. The base of the flange 7 is connected with the cylinder support plate 6 by bolt connection. The cylinder fixing plate 5 is sleeved on the outer middle section of the vertical cylinder 4. The cylinder fixing plate 5 is installed on the middle section of the rack 1 by bolt connection, which supports and fixes the vertical cylinder 4.

[0028] As shown in Figure 1 The high-pressure vortex fan 8 is located on one side of the vortex airflow threshing device and is supported by the second rack, as shown in Figure 1 The fan support plate 9 is placed on the fan support 10. The high-pressure vortex fan 8 is placed on the fan support plate 9. The height of the air outlet of the high-pressure vortex fan 8 is consistent with the height of the air inlet 15 of the vertical cylinder 4. The air pipe at the air inlet 15 of the vertical cylinder 4 is inserted into the air outlet of the high-pressure vortex fan 8. The high-pressure airflow generated by the high-pressure vortex fan 8 enters the vertical cylinder 4. The high-pressure vortex fan 8 mainly provides the threshing power for the corn ears in the vortex airflow threshing device.

[0029] As shown in Figure 1 and 5 The upper end side of the vertical cylinder 4 is provided with a discharge port 16. The discharge port top cover 3 is installed on the top of the vertical cylinder 4 and the discharge port 16. A circular hole is formed in the middle of the discharge port top cover 3. The feeding pipe 2 is inserted into the vertical cylinder 4 from the circular hole and is fixed in the mounting hole 14 of the cylinder arc bottom 12. The height of the feeding pipe 2 is higher than that of the discharge port top cover 3.

[0030] It should be noted that in the embodiment, the flexible protrusions on the feeding pipe 2 and the vertical cylinder 4 are all rubber protrusions 11. In actual use, one skilled in the art can select other flexible protrusions made of suitable materials according to needs.

[0031] Working process: the high-pressure vortex fan 8 is started, high-pressure and high-flow air is blown into the vertical cylinder 4, and a vortex air flow is formed in the vertical cylinder 4. The workers send the corn ears into the feeding pipe 2 one by one. Under the joint action of the gravity of the corn ears and the air flow blown into the vertical cylinder 4, the corn ears fall relatively stably to the bottom of the feeding pipe 2, and then slide along the slope of the slope base 13 into the inside of the vertical cylinder 4 after contacting the slope base 13. Under the action of the vortex air flow, the corn ears make spiral ascending motion along the inner wall of the vertical cylinder 4. In the process of motion, the corn ears collide with the rubber protrusions 11 on the inner wall of the vertical cylinder 4. Due to the mechanical impact of the rubber protrusions 11 on the corn ears, the kernels on the corn ears begin to fall off. After the corn ears collide with the rubber protrusions 11 on the inner wall of the vertical cylinder 4, the circular motion of the corn ears along the inner wall is broken, and the corn ears move to the central area of the vertical cylinder 4. In the process of motion, the corn ears collide with the rubber protrusions 11 on the outer wall of the feeding pipe 2, and then the corn ears move to the inner wall of the vertical cylinder 4 again. In this process, the kernels on the corn ears continuously fall off. When the corn ears rise to the middle section of the vertical cylinder 4, a plurality of rubber protrusions 11 are arranged on the circumference of the middle section, so that the collision probability is increased, and the effect of threshing the corn ears is enhanced. Then the corn ears continue to make spiral ascending motion. In the whole process of motion of the corn ears, the corn ears also rotate under the action of the vortex air flow. When rotating, the corn ears collide with the rubber protrusions 11 and the inner wall of the vertical cylinder 4, and the kernels on the corn ears also fall off. The fallen corn kernels rise spirally to the top end of the vertical cylinder 4 under the action of the air flow, and then are blown out of the discharge port 16. The top cover 3 of the discharge port plays a guiding role for the corn kernels to prevent the corn kernels from splashing.

[0032] In the vertical cylinder 4, the farther the distance from the air inlet 15, the greater the dissipation degree of the air flow, and the smaller the buoyancy received by the corn. Therefore, when the corn ears move to a certain height, the gravity of the unthreshed corn ears is greater than the upward buoyancy received by the corn ears, and the unthreshed corn ears move to the bottom of the vertical cylinder 4 again, so as to perform the threshing process described above again. Until the corn ears are completely threshed, the cob is relatively light in quality, and the cob rises spirally to the top end of the vertical cylinder 4 under the action of the air flow and is blown out of the vertical cylinder 4, thereby completing the whole threshing process.

[0033] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, shall still fall within the scope of the technical solution of the present application.

Claims

1. A vortex air flow driven flexible impact type threshing device for corn cobs, characterized in that, The utility model provides a kind of corn threshing machine, including feeding device, vortex airflow threshing device, high pressure vortex fan and rack, and vortex airflow threshing device and high pressure vortex fan are respectively installed on rack, feeding device includes feeding round pipe, inclined base and flexible protrusion, inclined base is arranged at the bottom of feeding round pipe, and bottom end opening is equipped on the lateral wall of feeding round pipe, and bottom end opening is located at the low side of inclined base, and flexible protrusion is arranged in streamline on the outer wall of feeding round pipe, vortex airflow threshing device includes vertical cylinder, cylinder arc base and flexible protrusion, cylinder arc base is installed at the bottom in vertical cylinder, and the center of cylinder arc base is equipped with mounting hole, and feeding round pipe is inserted into mounting hole and arranged coaxially with vertical cylinder, and flexible protrusion is arranged in streamline on the inner wall of vertical cylinder, and the lower end of vertical cylinder is equipped with air inlet, and the upper end is equipped with discharge port and discharge port top cover, and the air outlet of high pressure vortex fan is connected with the air inlet of vertical cylinder, and corn ear is fed from the top end of feeding round pipe and slides into vertical cylinder through inclined base and bottom end opening, and high pressure airflow generated by high pressure vortex fan blows into vertical cylinder and forms vortex airflow, and vortex airflow drives corn ear to move in vertical cylinder and collides with flexible protrusion arranged on the inner wall of vertical cylinder and the outer wall of feeding round pipe to achieve the effect of threshing.

2. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The bottom of the inclined base is flush with the bottom of the vertical cylinder, and the vertex of the inclined surface of the inclined base is on the midline of the unopened portion of the feeding round pipe.

3. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The flexible protrusions on the outer wall of the feeding round pipe are arranged in a helical line, and the direction of the helical line is consistent with the direction of the vortex airflow.

4. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The flexible protrusions on the inner wall of the vertical cylinder are arranged in two ways. The first way is to be arranged spirally from the air inlet to the discharge port, and the spiral direction is consistent with the direction of the vortex airflow. The second way is to uniformly arrange a plurality of flexible protrusions on the circumferential surface of the inner wall at the middle section of the vertical cylinder, so as to increase the mechanical impact degree of the corn ear.

5. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 4 wherein, In the second arrangement way, the flexible protrusions are uniformly arranged at intervals of 45° in the circumferential direction of the inner wall of the vertical cylinder.

6. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The air inlet of the vertical cylinder is arranged on the tangent line of the vertical cylinder to ensure that the airflow enters tangentially.

7. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The height of the air outlet of the high pressure vortex fan is consistent with the height of the air inlet of the vertical cylinder.

8. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein, The upper surface of the cylinder arc base is an inclined surface or an arc surface with one side higher and the other side lower, and the highest point of the inclined surface or the arc surface is flush with the center of the air inlet.

9. A flexible impact type threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein, The vortex airflow threshing device is installed on the rack through a cylinder support plate, a wind pipe flange and a cylinder fixing plate. The cylinder support plate is fixed on the rack. The bottom of the vertical cylinder is placed on the cylinder support plate and connected with the cylinder support plate through the wind pipe flange. The cylinder fixing plate is sleeved outside the middle section of the vertical cylinder, and the cylinder fixing plate is installed in the middle part of the rack through bolts, thereby supporting and fixing the vertical cylinder.

10. A flexible impact threshing device for maize cobs driven by vortex air flow as claimed in claim 1, wherein The flexible protrusions on the feeding round pipe and the vertical cylinder are rubber protrusions.

Images