JPH0226281Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for sorting threshed grain in a stationary threshing machine mounted on a combine harvester. A rotary sorting body with a porous shaped circumferential surface that does not allow straw waste to pass through but allows grains to pass through is arranged approximately horizontally, and one side of the cylindrical circumferential surface of this sorting body faces the suction side of the cross-flow fan. By guiding the threshing from the handling chamber to the upper side of the cylinder periphery where the body rotates, straw waste and grains are separated to the outer periphery of the cylinder. Dust is sorted out by suction air that crosses the air and flows toward a cross-flow fan, thereby providing a sorting device that is more compact and vibration-free than conventional swing-type sorting devices. By forming the cross section into a wavy shape, the adsorption area for grains, etc. is increased compared to that of a cylindrical cross-sectional surface, improving the sorting ability and also removing grains and small, light straw debris placed on the sorting body. By moving the sorting body along the corrugated uneven circumferential surface as it rotates, the positional relationship between the grain removal and the holes on the cylinder circumferential surface is shifted, which improves the passage of suction air and improves the degree of sorting. This is what we are trying to do.

The present invention will be explained below with reference to the drawings of the embodiments. In the drawings, reference numeral 1 indicates a machine frame of a threshing machine. A handling chamber 2 defined inside the machine frame 1 is equipped with a handling barrel 3, and a lower part of this handling barrel 3 is provided with a handling chamber 2. A crimp net 6 is installed on the upper side of the machine frame 1 except for the dust inlet 5 on the side opposite to the grain culm entrance 4 to the handling room 2. A feed chain 7 is provided for conveying from the inlet 4 along the handling cylinder 3.

Reference numeral 8 indicates a cross-flow fan disposed on the lower side of the handling chamber 2 substantially parallel to the axis of the handling barrel 3, and the cross-flow fan 8 has blades 9 whose lengths in the axial direction are equal to the handling chamber 2. The air inside the machine frame in the lower part of the handling room 2 is sucked from a dust discharge passage 10 which is approximately the same as the axial length of the body 3 and is opened downward on the outer surface of the machine frame 1. It is configured to be ejected outside the aircraft.

Reference numeral 11 denotes a rotating concentric 2 disposed at the bottom of the handling chamber 2.
It is a heavy cylindrical sorting body, and its outer cylinder 12 is formed into a cylindrical cross section, and the cylindrical peripheral surface is formed into a porous shape such as a coarse mesh or perforated plate through which threshed grains pass and large straw waste does not pass through. On the other hand, the inner cylinder 13 is formed so that its cylinder peripheral cross section is wave-shaped, and dust passes through the cylinder peripheral surface.
Form in a porous form such as a fine mesh mesh or perforated plate that grains cannot pass through.

For example, in the illustrated embodiment, the perforated plate is used as the sorter 1.
The inner cylinder 13 is formed by alternately bending longitudinal concave curved grooves and convex curved protrusions along the axis of the inner cylinder 13.

When the two cylinders 12 and 13 are arranged concentrically on a horizontal rotation shaft 14 arranged parallel to the rotation axis of the cross-flow fan 8 on the suction side and rotated in opposite directions, the pulley 15 is fixedly rotated. Inner cylinder 1 on shaft 14
3 is fixed, while the outer cylinder 12 is rotatably supported on the rotating shaft 14, and a pulley 16 is fixed to one end of the outer cylinder 12, so that the upper circumferential surface of the outer cylinder 12 is connected to the suction of the cross-flow fan 8. The inner cylinder 13 is rotated in the opposite direction. For example, in the arrangement of the cross-flow fan 8 and the sorting body 11 shown in FIG. 2, the cross-flow fan 8 is rotated clockwise, and the outer cylinder 12 of the sorting body 11 is rotated clockwise.

A cross-flow fan 8 is provided between the sorting body 11 and the handling chamber 2 to remove the grains from the crimp net 6 and the dust feeding port 5 on the outer peripheral surface of the upper half of the circumference of the outer cylinder 12 of the sorting body 11. A guiding means 17 such as a hopper is provided to guide the flow to a position far from the suction side of the cross flow fan 8 in the sorting body 11 from the side of the machine frame 1 so that one of the flow plates 18 of the guiding means 17 is guided to a position far from the suction side of the cross flow fan 8 in the sorting body 11. A processing conveyor 19 such as a screw conveyor extending along the axis of the sorting bodies 11 is disposed above the flow plate 18, and a leakage net 20 is provided below the processing conveyor 19. is stretched over the crimp net 6 so that the leaked degrain from the crimp net 6 can be supplied above the sorting body outer cylinder 12 in a substantially uniform distribution along the axial direction of the sorting body 11 via the processing conveyor 19. .

Below the flow plate 18, an air intake port 21 is opened in the side surface of the machine frame 1, and from this air intake port 21, the flow of grain that slopes downward toward the side surface of the sorting body 11 that is far from the suction side of the cross flow fan 8 is carried out. A plate 22 is provided to prevent grains passing through the sorting body 11 from the guiding means 17 from scattering outside the machine through the air intake port 21.

Further, the lower surface of the ventilation passage from the cross-flow fan 8 to the sorting body 11 is formed into a lower flow grain plate 23 that slopes in a V-shaped cross section, and the lower end of the lower flow grain plate 23 is provided along the axis of the sorting body 11. Extending screw conveyor 2
A grain receiving gutter 25 having a grain receiving gutter 2 is provided, and this grain receiving gutter 2
A grain lifting cylinder 26 is connected to one end of the machine 5, and the grains can be taken out from the machine.

In this configuration, grains such as grains and culms that are threshed by the handling cylinder 3 from grain culms being conveyed in the feed chain 7 are transferred from the guiding means 17 to the upper half outer peripheral surface of the outer cylinder 12 of the sorting body 11. Large pieces of straw are guided upward, and are carried to the suction side of the cross-flow fan 8 while being adsorbed to the outer surface of the upper half of the circumference by the suction air passing through the holes in the circumferential surface of the outer cylinder 12, where they are The suction air blowing from the inner diameter side of the sorting body passes through the cross-flow fan 8 and is discharged to the outside of the machine.

grains falling through the holes of the outer cylinder 12;
Among small straw waste and dust, fine dust is removed from inner cylinder 1.
It falls on the inner diameter side through the hole 3, is carried by the suction wind that crosses this inner cylinder 13, is carried to the outside of the sorting body 11 through both the inner and outer cylinders 12 and 13, and is discharged outside the machine in the same way as the large straw waste. Ru. Grains and small pieces of straw fall along the outer periphery of the inner cylinder 13 as it rotates, but in the upper half of the inner cylinder 13, grains and small pieces of straw that are placed on the convex stripes on the periphery of the corrugated cross-sectional cylinder are dropped. As the grains slide in the direction of the concave groove and move against the holes on the cylindrical circumferential surface, the holes are not blocked and the dust is easily drawn into the inner diameter side along with the suction wind, improving sorting accuracy. can. In addition, since the grains, etc. are received in the groove, they do not fall at a faster speed than the circumferential speed of the inner cylinder, unlike in the case where the inner cylinder 13 is a moon on the cylindrical circumferential surface, and the grains, etc. stay in the inner cylinder. Since the time is longer, the sorting ability and accuracy are both improved. Furthermore, when sliding into the concavely curved groove, small straw waste with a light specific gravity is easily attracted to the circumferential surface by the suction wind that passes through the hole in the cylinder circumferential surface and crosses to the inner diameter side, so that it is stuck to the bottom of the concave groove. The grains that are easy to stay and have a large specific gravity are placed on top of the small straw debris, so when they reach the lower half of the cylinder circumference, the grains fall quickly, and the small straw debris remains adsorbed to the cylinder circumference and crosses. It is carried to a position facing the suction side of the flow fan 8, where it is carried by the suction wind blowing through from the inner diameter side of the inner cylinder 13, and is discharged to the outside of the machine via the cross flow fan 8 in the same way as the dust. .

In addition, in the present invention, even if the outer cylinder 12 of the sorting body 11 in the above embodiment is omitted and the sorting body has only the porous inner cylinder 13 through which straw waste and grains do not pass, the grains can be sorted in the same way. .

In summary, in the present invention, a rotating cylindrical sorting body and a cross-flow fan are installed in the lower part of a handling chamber containing a handling cylinder, and the cylindrical side circumferential surface of the sorting body faces the suction side of the cross-flow fan, and the rotation of both They are arranged so that their axes are substantially horizontal and substantially parallel to each other, and the cylindrical peripheral surface of the sorting body is formed into a porous shape such as a mesh or perforated plate that does not allow straw waste to pass through, and the handling chamber and the sorting body are In between, a guiding means for guiding the threshing from the handling chamber is provided on the circumferential surface of the sorting body cylinder, and since the sorting body is simply rotated, the drive structure is extremely simple, and it is different from the conventional swing type. Vibration is extremely low compared to sorting equipment.

Between the handling chamber and the sorting body, the threshed grains from the handling chamber are guided onto the cylindrical surface of the sorting body, so that fine dust and large grains are removed by the wind sucked through the holes in the cylindrical surface of the sorting body. The grains can be separated into separate paths on the inner diameter side and the outer diameter side of the cylinder of the sorting body, and the sortability with grains is extremely good.

Furthermore, since the cylindrical circumferential surface of the sorting body is formed to have a wave shape in a cross section perpendicular to the axis of the sorting body, the adsorption area for grain removal increases, and the grain removal guided from the guiding means has a wave-shaped concave shape. It is caught in the groove part,
The sorting ability is improved by increasing the retention time, that is, the time during which the sorting body moves downward as the sorting body rotates, instead of falling down immediately as in the case of the cylindrical circumferential surface.
Both sorting accuracy can be improved. This sorting body also has the advantage that it can be manufactured very easily by bending a perforated plate and rolling it into a cylindrical shape.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a threshing machine, and FIG. 2 is a sectional view taken along the - line in FIG. 1. 1... Machine frame, 2... Handling room, 3... Handling trunk, 7...
Feed chain, 8...Cross flow fan, 11...
Cylindrical sorting body, 6...Crimp net, 17...Guiding means, 24...Screw conveyor, 25...Grain receiving gutter, 23...Lower flow grain plate, 12...Outer tube, 13
...Inner cylinder.

Claims (1)

[Scope of utility model registration request] A rotary cylindrical sorting body and a cross-flow fan are installed in the lower part of a handling chamber containing a built-in handling cylinder, with the circumferential surface of one side of the cylinder of the sorting body facing the suction side of the cross-flow fan, and the rotation axes of both of them being approximately horizontal. The cylindrical peripheral surface of the sorting body is formed into a porous shape such as a mesh or perforated plate through which grains do not pass, and the cylindrical peripheral surface of the sorting body has a wave-shaped cross section. A sorting device for a threshing machine, wherein a guide means is provided between the handling chamber and the sorting body on the peripheral surface of the cylinder of the sorting body to guide the threshing from the handling chamber.