JPS593361B2 - Grain elevator discharge chamber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge chamber of a packet elevator type grain elevator, and is particularly suitable for use in a grain circulating dryer.

A conventional discharge chamber of this type has a structure in which an arcuate guide plate is provided in the discharge chamber at a location facing the grains discharged from the packet, and which smoothly gradually recedes as it goes downward.

The main purpose of this guide plate was to smoothly direct the grains discharged from the packet toward the discharge port provided at the bottom of the discharge chamber.

Because this product does not apply a large impact to the grains released from the packet, it is difficult to separate the stalks, awns, etc. attached to each grain, and the stalks and awns become entangled with each other and accumulate. A bridging phenomenon may occur at the outlet of the tank or ventilation drying tank, resulting in poor outflow.

This invention focuses on the large kinetic energy of the grains released from the packets in the discharge chamber of the elevator, and uses this kinetic energy to apply a large impact to the released grains, and this impact causes each grain to adhere to the grains. The purpose of this invention is to effectively separate and remove the branches and awns.

In addition, the second invention applies a large impact to the grains that are intermittently released from each packet while continuously blocking them.
The purpose is to reduce noise while increasing the separation and removal of stems and awns.

The present invention will be described below with reference to illustrated embodiments.

1 and 2 are a side view and a front view of a grain circulation type dryer embodying the present invention, and this grain circulation type dryer has a storage tank 11, a ventilation drying tank 12, and a grain collecting section 13 viewed from above. Its main parts include a main body 1 stacked downward and a packet elevator type elevator 2 erected in front of the main body 1.

A screw conveyor type equalizing and dropping device 111 is installed at the top of the storage tank 11, a hot air generator 121 equipped with a furnace is installed at the front of the ventilation drying tank 12, and an air exhaust system equipped with a suction fan is installed at the rear of the drying tank 12. Each of the devices 122 is equipped with a feeding valve (not shown) in the upper part of the grain collection section 1.3 that allows the grains in the ventilation drying tank 12 to flow down intermittently, and a feeding valve (not shown) in the lower part of which allows the grains fed out to flow down intermittently. A screw conveyor 131 is installed at the bottom of the elevator 2.

Further, a discharge part 21 is provided at the upper part of the elevator 2, and the discharge part 2
The discharge port 213 formed in the lower part of
It is connected to the starting end of 11.

Note that 22 is a hopper provided at the bottom of the elevator 2 for loading grain.

The discharge section 21 is as shown in FIG. 3.

That is, when the packet 23 rotates at the top of the elevator 2, there is a discharge chamber 2 that bulges out laterally at a portion from which grain is discharged.
11, and at a portion of the discharge chamber 211 facing the ejected grains, there are four flat plates facing in a direction substantially orthogonal to the ejection direction of the grains, and a flat plate mating with these to form a retreating step part. The stepped collision plates 212 that are integrally connected are arranged so as to be sequentially retreated toward the bottom.

Here, as a result of monitoring the discharge state of the grains in the packet 23 located at the top, it was found that most of the grains were discharged within the range of the turning angle a of the packet 23 in the figure.

Furthermore, the grains continuously released from one packet within the range of the above-mentioned turning angle a form an involute curve C that expands in the counter-turning direction with respect to the turning circle of the packet 23.
It turned out that the light was drawn and emitted.

In view of this point, in this example, each of the four plane plates of the collision plate 212 divides the above-mentioned turning angle a into four equal parts, and is perpendicular to the lines d1 to d4 in the grain release direction from the time of each quarter division. Face the direction.

Furthermore, the above-mentioned retreat Q amount of the collision plate 212 (approximately corresponds to the length of the flat plate).

), when the final release grain A from the previous packet 231 reaches the lowest collision plate 212■, the latter packet 2
The setting is such that the initially released grain A from 32 reaches the uppermost collision plate 2122.

The amount of retraction of the collision plate 212 is preferably set to 3cIrL when the pitch of the packets 23 is 12cIfL, but it increases as the pitch increases, and conversely decreases as the pitch decreases. .

In the lower part of the discharge chamber 211, an outlet with a small cross-sectional area, that is, a discharge outlet 213 that opens at the starting end of the equalizing drop device 111 and an outlet 214 that communicates with the discharge pipe 25 are provided in parallel. The discharge chamber 211 is alternately connected to the discharge chamber 211 by a shutter 215 mounted inside the discharge chamber 211 .

One end of the dust exhaust pipe 3 is communicated with the right side of the discharge chamber 211 in FIG.
It is connected to the sorting device 4 placed on the top surface of the .

As shown in FIG. 4, this sorting device 4 consists of a sorting box 41 shaped like a scalene triangular box and a suction fan 42 placed on the slope of this sorting box 41.

The starting end side of the sorting box 41 forms a large-volume space 43, and the other end of the dust exhaust pipe 3 faces the starting end side of this hole space 43, and the lower part of the space 43 is equipped with an equalizing and dropping device 111. communicate with the top of the

Furthermore, a partition plate 44 combined in a triangular shape is installed at the terminal end of the sorting box 41, and a throttle channel 45 communicating with the upper part of the space 43 is formed at the terminal end. The suction port of the suction fan 42 is opened at the terminal end.

Note that 46 in FIG. 4 is a selected airflow inlet that communicates with outside air, and 24 in FIG. 2 is a selected airflow inlet that introduces outside air into the discharge chamber 211.

Further, 31 is an opening in the discharge chamber 211 of the dust exhaust pipe 3.

Since the present invention is constructed as described above, when the grain circulation type dryer is in operation, the grains in the storage tank 11 are sequentially transferred to the ventilation drying tank by driving the feeding valve (not shown) in the grain collecting section 13. The grains flow down into the grain collecting part 12, are exposed to hot air in this part, remove a predetermined amount of moisture, and then flow into the grain collection part 13,
Then, it is transported to the lower part of the elevator 2 by the screw conveyor 131.

After the grains conveyed to the lower part of the elevator 2 are lifted up by the packet 23, when the packet 23 rotates at the top, it is discharged into the discharge chamber 211 while drawing an involute curve C over the range of the rotation angle a. will be done.

The released grains collide in the orthogonal direction from the uppermost collision plate 212■ to the lowermost collision plate 212■ sequentially from the initial discharged grain A to the final discharged grain A. The grains released will also be hit hard.

Furthermore, when the final discharge grain A from the preceding bucket 231 reaches the lowest collision plate 212, the initial number of grains released from the subsequent packet 232.

Since the grains will reach the uppermost collision plate 212■, even if the grains are intermittently released from each packet 23,
These do not collide intensively with the collision plate 212.

Next, the grains that collided with the collision plate 212 fall into the lower part of the discharge chamber mainly due to their own weight, and are discharged to the outside through the discharge port 214 and the discharge pipe 25 when the shutter 215 is moving to the left in FIG. 3. It turns out.

In addition, the branches, stems, awns, etc. attached to the grains are separated from the grains by the collision when they collide with the collision plate, and are temporarily suspended in the discharge chamber 211 due to the difference in specific gravity between the grains and the grains. becomes.

On the other hand, inside the discharge chamber 211, an air current is generated in the direction of the opening 31 by a suction fan 42, and the above-mentioned floating dust such as branches and awns is guided by the air current and is sorted out through the opening 31. It will be sent to device 4 and removed.

As described above, in this invention, the packet is rotated at the top of the elevator to form a bulge in the direction of discharging grain, and has an outlet with a small cross-sectional area at the bottom, and the inside of the bulge forming part Collision plates that are substantially perpendicular to the direction of grain ejection from the packet are provided in a stepped manner and are sequentially retreated toward the bottom, and the bulge forming portion is connected to a suction fan. A large impact is applied to the grains discharged from the grain to effectively separate the branches and awns attached to the grains, and these separated materials are efficiently guided to the sorting device by the airflow generated in the discharge chamber and removed. It has the effect that it can do.

In the second invention, in addition to the above-mentioned configuration, the amount of retraction of the collision plate is adjusted such that the initial release grain from the subsequent packet reaches the collision plate by the time when the final release grain from the previous packet reaches the lowest stage of the collision plate. Since the setting is made so that the grains reach the top stage of the packets 23, even if the grains are intermittently released from each packet 23, they do not intermittently concentrate and collide with the collision plate 212, and are dispersed little by little. This results in continuous collisions.

Therefore, while having the functions and effects of the first invention, it is possible to reduce noise in the discharge chamber as much as possible.

[Brief explanation of the drawing]

Fig. 1 is a side view of a grain circulation dryer embodying the present invention; Fig. 2 is a partial front view thereof; Fig. 3 is a sectional view taken along line I-I in Fig. 1; and Fig. 4 is a portion of Fig. 1. FIG. 1: Main body, 11: Storage tank, 111: Equal distribution dropping device, 12
: Drying tank, 13: Grain collecting section, 131 Niscrew conveyor, 2: Elevator, 21: Discharge section, 211: Discharge chamber, 212
: Collision plate, 212■: Uppermost collision plate, 212■: Lowermost collision plate, 213: Discharge port, 214: Discharge port, 215
:Shutter, 22:Hopper, 23:Packet, 231:
Front packet, 232: Back packet, 3: Dust exhaust pipe, 4: Sorting device, 41: Sorting box, 42: Suction fan.

Claims (1)

[Scope of Claims] 1. A packet is formed in a bulge at the top of the elevator in the direction in which the packet rotates and releases grain, and has an outlet with a small cross-sectional area at the bottom, and the packet is formed inside the bulge. The collision plate, which is approximately perpendicular to the direction in which the grain is released, is sequentially retreated in a step-like manner as it goes downward. A discharge chamber of a grain elevator, wherein the bulge forming part is connected to a suction fan. 2 At the top of the elevator, the packet rotates to form a bulge in the direction in which the grain is discharged, and at the bottom there is an outlet with a small cross-sectional area, and inside the bulge forming part there is a bulge formed in the direction in which the grain is discharged from the packet. Collision plates that are substantially orthogonal to the plane are provided in a step-like manner and are sequentially retreated toward the bottom, and the amount of retreat of the collision plates is as follows:
The final release grain from the previous packet reaches the bottom stage of the collision plate, and the initial release grain from the latter packet reaches the top stage of the collision plate, and the bulge forming part is The discharge chamber of a grain elevator connected to a suction fan.