JPH0528997Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to an improvement of a second reducing device in a threshing machine.

(Prior art) Materials that leak through the receiving net in the handling room and are not collected at the first outlet, and materials discharged from the dust outlet in the handling room that are not discharged outside the machine by the suction blower. Conventionally, grains are collected at the second port, where they are once transferred to one side of the machine by a screw conveyor, and then sent to the handling room or onto the grain transfer structure by a thrower or screw conveyor for wind sorting. I was giving back without doing anything.

(Problems to be solved by the invention) In the case of the above-mentioned conventional technology, when the second material is reduced, the second material is returned to the handling room or onto the sieve by an independent second reducing device independent of the second sorting section. However, depending on the material and operating conditions, clogging may occur depending on the material and operating conditions.Also, the screw conveyor used as a second reduction device to transfer grain to one side of the machine, and the grain conveyor inside the handling room or onto the grain transfer structure. Not only is the cost high because a return thrower and screw conveyor are required, but the processing structure after threshing is complicated.

(Means for solving the problem) In order to solve the above-mentioned problem, in the present invention, a receiving net is stretched under the handling chamber in which the handling cylinder is mounted on the axis, and a receiving net is provided below the handling chamber for grain transfer. A sorting net is installed above the first port on the transfer end side of the grain transfer structure, and a dust exhaust port is opened on the discharge port side of the handling chamber, and a dust exhaust port is opened at the rear of the handling chamber. A suction blower device is configured on the supply port side, and a second sorting and recovery air path is formed from a side area of the suction port of the suction blower device toward the sorting net body below, and An impeller device is configured such that the impeller device is forcibly rotated to the lower side of the second sorting and recovery air passage behind the second sorting and recovery air passage and has a protruding width that is approximately the same width as the width of the second sorting and recovery air passage. It is designed to bounce out the second-class materials toward the second-class collection air path above the sorting net and return them.

(Function) The grain culm that enters the handling chamber through the supply port is given a threshing action by the rotating handling drum, and the grains leak through the receiving net.

When the threshed grains that have leaked through the receiving net fall onto the grain transfer structure, they are air-selected in the sorting air passage, and straw waste and the like are sucked into the suction port.

The first thing, such as grains, that has fallen onto the grain transfer structure is then transferred toward the first mouth. The first grains sent out from the transfer end of the grain transfer structure fall onto the sorting net and are sorted there, and the grains that have leaked through the sorting net are collected into the first mouth. The straw waste, etc. that does not leak through the sorting net is sucked up by the suction blower device through the second sorting and recovery air passage toward its suction port.

On the other hand, the materials that do not leak through the receiving screen in the handling room are discharged from the dust outlet to the upper part of the second sorting and collection air passage as second materials. Among the discharged second materials, straw waste and the like are sucked into a suction port by a suction blower device and discharged outside the machine. The second material that is not discharged thereupon falls through the second sorting and recovery air path against the suction action of the suction blower device. The fallen second object slides down along the falling plate of the second sorting and recovery air path and enters the casing of the impeller device. The second grains that have entered the casing are thrown out onto the grain transfer structure by the impeller and returned.

Reduction using this impeller device is not only a simple reduction effect, but also a combination of centrifugal separation and wind selection, which utilizes the difference in splashing power due to the difference in specific gravity between grains and straw waste. Since the centrifugal force is small, the particles are not splashed far and cannot cross the second sorting and recovery air path, but are sucked up through the second sorting and recovery air path by the suction action of the suction blower device in this vicinity, and are passed through the suction port as the third sorting material. It is ejected from the aircraft.
On the other hand, grains with heavy specific gravity are thrown away due to the large centrifugal force, resist the wind selection action of the second sorting and recovery air path, cross the air path, and near the transfer end of the grain transfer structure. It is jumped up to the point. The grains returned onto the grain transfer structure are treated together with the first grains that have leaked through the receiving net of the handling room.

However, the reduction state by this impeller device is such that the protruding width of the impeller device is approximately the same width as the width of the second sorting and recovery air passage, so the reduced product is not concentrated locally but is spread over the entire width direction. Since the thickness of the layer of dispersed reductant becomes thinner, the wind separation between grains and straw waste is further improved.

The waste straw threshed in the handling room is discharged outside the machine through the discharge port (fourth port).

(Example) A is a threshing machine in which the present invention can be implemented, 1 is a handling chamber of the threshing machine A, a handling cylinder 2 is mounted on a shaft in the handling chamber 1, and a receiver is installed on the lower side of the handling chamber 1. Set up net 3.

A grain transfer structure 4 is suspended below the handling chamber 1. The grain transfer structure 4 is configured to swing a step-like transfer plate to transfer leakage from the receiving net 3 on the plate to the rear transfer end side. A first opening 5 is formed at the lower rear of the grain transfer end of the grain transfer structure 4. A sorting net 6 is installed horizontally above the first opening 5 and directly below the transfer end of the transfer structure 4.

A dust exhaust port 8 is opened on the discharge port 7 side of the handling chamber 1. On the other hand, a suction blower device 10 is configured on the side of the supply port 9 at the rear of the handling chamber 1. The suction blower device 1
The suction port 10a of No. 0 is formed on the discharge port 7 side.

Reference numeral 11 denotes a second sorting and recovery air passage, and the second sorting and recovery air passage 11 is formed from a side area of the suction port 10a toward the sorting net 6 below. 11a is a downstream plate forming the second sorting and recovery air passage 11. The second sorting and recovery air passage 11 communicates with a sorting air passage 12 formed between the receiving net 3 and the grain transporting and sorting structure 4.

An impeller device 13 is provided behind the first opening 5 and below the second sorting and recovery air passage 11.
The impeller 13a of the impeller device 13 is forcibly rotated and its protruding width is approximately the same as the width of the second sorting and recovery air path. The casing 13b that houses the impeller 13a does not form an air intake port,
However, it is connected in a hermetically sealed manner with the downstream plate 11a. The outlet 13c of this impeller device 13 opens facing the second sorting and recovery air passage 11 above the sorting net 6.

In addition, 14 is a first material collection conveyor, and 15 is a grain culm pinching transfer chain device.

(Effect of the invention) In the present invention, when the second material is reduced, it is splashed out by an impeller device, and the centrifugal separation effect and the direction of the splashing are used as the second sorting and recovery air path. Since it combines a separation action, it is effective in separating grains and straw waste, and the layer of reduced material (grain and straw waste) thrown out by this impeller device is formed to be thin. separation can be further improved.

On the other hand, since the impeller device itself as the second reducing device plays a part in the separation function and does not require any other conveying and reducing device, the clogging phenomenon caused by these conveying devices is completely eliminated, and the cost is also reduced. . In addition, it has great practical effects, such as simplifying the processing structure after threshing.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention.
The figure is a plan sectional view, and FIG. 2 is a side sectional view. The main characters in the drawing are the explanations of the symbols, A...thresher, 1...
Handling room, 2... Handling barrel, 3... Receiving net, 4... Grain transfer structure, 5... First mouth, 6... Sorting net body, 7... Discharge port, 8... Dust exhaust port, 9... Supply port, 10... Suction blower device, 10a... Suction port, 11... Second sorting and recovery air path, 13... Impeller device.

Claims (1)

[Scope of utility model registration request] A receiving net is installed below the handling chamber in which the handling barrel is mounted, and a grain transfer structure is installed below the handling chamber, and the grain transfer structure is placed above the top of the mouth at the transfer end side of the grain transfer structure. A sorting net is disposed at the side, and a dust exhaust port is opened on the discharge port side of the handling chamber, and a suction blower device is configured on the supply port side at the rear of the handling chamber, and a suction blower device is configured on the side of the suction port of the suction blower device. A second sorting and recovery air path is formed from the top of the screen toward the sorting net body below, and behind the first opening, the second sorting and recovery air path is forcedly rotated and An impeller device is configured to have a width that is approximately the same as the width of the number sorting and recovery air passage, and the impeller device bounces the second item toward the second sorting and recovery air passage above the sorting net. A second reducing device in a threshing machine characterized by being configured to extract and return grains.