JPH0353556B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows the grain loaded in a grain tank installed in the machine body to flow down in a plurality of grain flow passages connected to the bottom of the grain tank. The grains that have passed through the grain flow lower passage are carried out by a screw conveyor and returned to the upper part of the grain tank by an elevator and circulated.
The present invention relates to an improvement in a grain drying device in which grains are dried by blowing drying air (hot air) in the flow path.

In the grain drying device of the above-mentioned form, when the grains to be dried are put into the grain tank, it is necessary to keep the grains in a state where the grains do not circulate. A shutter is installed in the section to prevent the grain from flowing out, and the shutter is closed and the grain is loaded into the grain tank.When the loading is finished, the shutter is opened and the grain tank is loaded. The grains inside the container flow through a grain flow path and flow down to a screw conveyor for carrying out provided below the flow path.

By the way, if the shutter provided at the lower end of the grain flow path can be omitted, the structure of the grain drying device can be simplified and the manufacturing cost can be reduced. From this, as stated in Japanese Utility Model Application No. 48-53776, a screw conveyor is provided at the confluence of a pair of inclined grain channels facing each other in an inverted V-shape, and the shutter is omitted. Measures have been proposed to do so.

However, in this method, when the screw conveyor is operated to circulate the grains by discharging the grains, the rotating screw conveyor is Since more grains are scraped out from the inclined grain channel that comes into contact first, there is a difference in the amount of grain flowing out from each grain lower channel, and the grain There is a problem that circulation becomes uneven and uneven drying occurs.

In other words, when grains loaded in a grain vat are divided into a plurality of grain flow passages that serve as drying sections through which drying air blows, and are allowed to flow down, the amount of grain flowing down each grain flow passage (flow rate) is If the grains are not aligned evenly, uneven drying will occur when the grains that have flown down the flow path are collected and returned to the grain tank for circulation to continue the drying process. This problem arises in the above-mentioned method.

For this reason, in the conventional means,
As stated in Publication No. 51726, a shutter such as a rotary valve or a drum shutter is provided at the lower end of each divided grain flow path, thereby regulating the flow rate of each grain flow path and making it uniform. Either the grains fed out through the shutters are combined and carried out of the machine by a screw conveyor, or
As stated in Publication No. 20929, the lower ends of a plurality of grain flow channels are merged into the upper end side of a single cylindrical flow channel via a baffle plate, and the lower end open opening of the cylindrical flow channel is opened. By placing a diaphragm vibrating with a vibrator at a short distance below and stopping the vibration of the diaphragm, the grains deposited on the top surface of the diaphragm create a cylindrical flow path. It functions as a shutter that dams the opening at the lower end and prevents the grain from flowing out, and by vibrating the diaphragm with a vibrator, the grains are deposited on the top surface of the diaphragm, and the grains are deposited at the lower end of the cylindrical flow channel. The grains blocking the opening flow and fall from around the diaphragm, causing the shutter to open, causing the grains to continue to flow out of the cylindrical flow path. , and are carried out by a screw conveyor with a diaphragm.

For this reason, in the present invention, the grains loaded in the grain tank are divided into a plurality of grain flow paths whose upper ends communicate with the grain tank, and the grains that have flowed through are allowed to flow down again. In a grain drying device that sprays hot air (drying air) in the grain flow path to dry the grain while circulating it back to the top of the grain tank, the amount of outflow from each of the grain flow paths is made uniform. While controlling the alignment of grains, omitting the shutter provided at the lower end of the grain flow path, it is possible to control the outflow of grains and carry them out of the machine using a screw conveyor for carrying out grains. The purpose is to provide new means.

Therefore, the present invention has been completed based on the knowledge obtained through various studies and experiments in order to achieve this object. In other words, when grains filled in a grain vat are divided into a plurality of grain flow paths and flowed down, the grain flow paths are provided diagonally, their lower ends are merged into one, and the merged portion is A screw conveyor is installed to transport the grains out of the machine.
If this screw conveyor also serves as a shutter that restricts the outflow of grains from a plurality of grain flow paths, the screw conveyor's unloading operation is performed by rotating the screws in one direction. Of the multiple grain flow paths that come into radial contact with the circumferential surface of the screw of the Yukon conveyor, the grain flow from the grain flow path that comes into contact with the circumferential surface of the screw of the screw conveyor first. The amount of grains flowing out increases, and the amount of grains flowing out from the grain flow path on the side that will later come into contact with the circumferential surface of the screw decreases, so that the amount of grains flowing out from each grain flow path is equalized. become uncontrollable. However, in this method, one grain flow passage extending downward is connected to the confluence of a plurality of grain flow passages, and the lower end of the one grain flow passage is connected to the right and left direction. A discharge port opening toward the side is opened in a split shape along the front-rear direction, and a screw conveyor for carrying out grains with the axial direction along the front-rear direction is attached to the discharge port. By installing the grains horizontally so as to dam up the grains flowing down the grain flow channels and flowing out from the outlet, it is possible to adjust the flow rate of each of the multiple grain flow channels while omitting the shutter. This is because the result is that the grains can be circulated in unison.

In view of this, in the present invention, as a means for achieving the above-mentioned object, a plurality of obliquely installed units are provided in the box-shaped body a, with the upper ends communicating with the grain tank when viewed from the front. The lower end of the upper grain flow passage is merged into the confluence part, and at the confluence part,
The upper end side of one lower grain flow path extending downward is connected, and a discharge port that opens to one side in the left-right direction is opened at the lower end of the lower grain flow path in the shape of a split along the front-rear direction. , a screw conveyor for carrying out grains having an axial direction along the front-rear direction is installed at the discharge port so as to dam the flow of grains flowing down the lower grain flow path and flowing out from the discharge port. This invention proposes a grain drying device characterized by being installed horizontally.

Next, embodiments will be described in detail with reference to the drawings.

FIG. 1 is a vertically sectional front view showing the overall outline of a grain drying device A in which the present invention can be carried out. The grain tanks to be installed, t and t, are upper grain flow passages installed diagonally with their upper ends inserted into the grain tank b, and d is the upper grain flow passage in the vertical direction from the confluence site of the two upper grain flow passages t, t. Lower grain flow path provided, c
indicates a screw conveyor installed horizontally at the lower end of the lower grain flow channel d.

The fuselage a is formed into a box shape with four circumferential walls 1, a bottom plate 2, and a top plate 3 (FIG. 2).

The grain tank b has four machine walls 1 around the aircraft body a,
It is shared by the front and rear and left and right machine walls of the grain tank b, and is installed in the upper part of the inner cavity of the machine body a.

The upper grain flow paths t, t are as shown in FIG.
When viewed from the front, a cylindrical shape having a substantially rhombic cross section is formed by an air permeable bulkhead 15 such as a net or a perforated plate at the center of the left and right sides of the internal cavity of the body a, which is the bottom of the grain tank b. An air guide path h is provided so as to span between the front and rear machine walls 1, 1 of the aircraft body a, and on the left and right sides of the air guide path h are made of breathable bulkheads such as mesh or perforated boards. Place the floor plates 4, 4 on the left and right walls 1,
By arranging the shelves so as to be inclined downward from the bottom of the grain tank b on the inner surface of the grain tank b toward the left and right centers of the machine body a, the left and right inclined floor plates 4, 4, and The lower halves 15a, 15a of the bulkheads 15 of the air guide path h facing each other are installed in an inclined state such that they are inclined downwardly from both left and right sides of the fuselage a toward the left and right center of the fuselage a, respectively, and They are arranged to merge below the air guide path h.

In addition, the lower grain flow path d hangs downward from the confluence site of the lower ends of the left and right upper grain flow paths t, t, at the left and right center portion of the machine body a below the air guide path h. It is equipped to do so. As shown in FIG. 1, this lower grain flow path d has a grain discharge port w opened to one side in the left-right direction, and has a split-shaped shape along the front-rear direction. It was opened in

In the illustrated embodiment, this lower grain flow path d is formed in the upper halves of the left and right partition walls 8, 9 which are air permeable partition walls, but may be formed with a blind plate.

And a screw conveyor c for carrying out grains.
As shown in Fig. 2, when the axis direction is along the longitudinal direction of the machine body a, the grains flow out from the lower ends of the left and right upper grain flow paths t, t and form a single lower grain flow path d. The lower grain flow path d
It is horizontally installed at a position facing the outlet w so as to dam the flow of grains that flow down and flow out from the outlet w at the lower end.
At the upper edge of the discharge port w, there is a diagonal partition wall y that blocks the upper part of the screw conveyor c.
is installed so as to be continuous with the partition wall 9 of the lower grain flow path d. In addition, at the bottom of the lower grain flow path d, due to the driving rotation of the screw conveyor c,
A bottom plate 5 is installed to carry out the grains in cooperation with the conveyor c. The screw conveyor is driven and rotated via an appropriate transmission mechanism to transfer the grains flowing down into the lower grain flow path d to the machine body a.
It is used so that it is carried out from the rear end side (right end side in Figure 2) toward the front end side of the machine a, and the front end side, which is the terminal side in the transport direction, is the front side of the machine a (the left side in Figure 2). side) is projected forward of the aircraft wall 1. Further, as shown in FIG. 2, the screw conveyor c has a spiral grain feeding blade 7 wrapped around the circumferential surface of the rotary shaft 6, which is approximately connected between the starting end and the terminal end in the conveying direction of the screw conveyor c. The grain feeding blades 7 are formed to have the same diameter and are wound at unequal pitches so that the pitch thereof gradually increases at a substantially constant slope from the starting end side to the terminal end side in the conveying direction. The screw conveyor C is formed in a screw conveyor c, so that the grain feeding capacity at each part of the screw conveyor c from the start end to the end end gradually increases from the start end to the end end,
When the grains in the lower grain flow path d flow into the pitch of the grain feeding blades 7 of the screw conveyor c, the entire area from the starting end to the terminal end of the screw conveyor c is On the other hand, the flow is maintained at a substantially uniform flow rate.

e is a loading port for loading grain into grain tank b;
It is opened at the top of the machine wall 1 on the front side (left side in Figure 1) of the machine body, and the loading port e has a grain lifting tower of the elevator f (bucket elevator) installed on the front side of the machine body a. A discharge cylinder part 12 provided at the upper end of the elevator 11 is connected and communicated with the grain tank 11, and the grains released from the bucket 13 of the elevator f are thrown into the grain tank b through the loading port e. be done.

Reference numeral ``g'' denotes a grain jumping table positioned in the middle of the flight trajectory of the grains released from the bucket 13 and shelved on the ceiling of the inner cavity of the grain tank b by appropriate supporting means 14; It acts to extend the flying distance of the grains so that they make a reflex jump as shown by arrow A in the figure and fall to the rear of the inner cavity of grain vat B, as shown by arrow B in the same figure. .

i is a duct that guides the hot air supplied to the air guide path h mentioned above, and is installed in the front of the machine wall 1 on the front side of the aircraft body a, as shown in FIG. It communicates with the air guide path h through the hole 16.
The duct i also serves as a mounting frame for a hot air generation device j (furnace) that is supplied to the air guide path h, and serves as an assembly seat 17 for mounting the hot air generation device j.
The assembly seats 17 for attaching the hot air generating device j are provided in pairs on the left and right sides of the machine wall 18 on the front side of the duct i, located on both the left and right sides of the elevator f mentioned above. The hot air generating device j is installed by properly selecting one of the left and right mounting seats 17, 17 and assembling it with a set bolt 20, and blocking the hot air intake port 19 in the other mounting seat 17. blind board k
are assembled with set bolts 20, and this blind plate k
By replacing the hot air generating device j with the hot air generating device j, the mounting position of the hot air generating device j can be switched from side to side.

l is an air exhaust path that guides the exhaust air of the drying air sent into the grain tank b from the above-mentioned air guide path h to the outside of the machine; It is formed with an internal cavity of the fuselage a below each of the floor plates 4, 4, which are made of breathable bulkheads that serve as the bottom plate of the fuselage a, and the airflow through the communication port 21 provided in the machine wall 1 on the rear side of the fuselage a. It communicates with the duct m provided on the rear surface of a, and further,
It communicates with a suction port of an exhaust fan n provided connected to the duct m.

Moreover, this exhaust passage l is connected to the lower part of the grain lifting tower 11 of the above-mentioned elevator f provided on the front side of the aircraft body a, and to the lower part of the wind guide pipe o and the grain lifting tower 11 as shown in FIG. They are communicated via the assembled dust removal case p, so that when the exhaust fan n is activated, the dust in the grain lifting tower 11 is suctioned and removed by the exhaust fan n through the air exhaust path l. There is. and,
The dust removal case p is formed in a hopper shape so as to return the grains that are thrown out from the communication port provided on the side surface of the lower part of the grain lifting tower 11 into the grain lifting tower 11 again.

q is a grain supply hopper for supplying grains into the elevator f, and 25 is a connection gutter for assembling the hopper q.

The embodiment device constructed in this manner operates as follows.

When the operation of the screw conveyor c is stopped and the grains are loaded from the grain supply hopper q and loaded into the grain tank b while the elevator f is operated, the grains are transferred to the grain tank b. The grains flow into the left and right upper grain flow channels t, t, which are diagonally installed and whose upper ends communicate with b,
However, there is no shutter to regulate the flow rate at the lower end of the left and right upper grain flow channels t, t, and they communicate with each other at the confluence site, so the grains flow into this confluence site. After merging here, the grains flow downward from the merging part to the lower grain flow path b, and flow out from the outlet w opened to the side opened at the lower end of the lower grain flow path d. Then, the flow is stopped by the screw conveyor c installed horizontally to block the discharge port w.
It gradually accumulates in grain vat b.

Then, when a predetermined amount of filling is reached, if the hot air generating device j and the blower n are operated while the screw conveyor c and the elevator f are operated, the screw conveyor c carries out the work and the elevator f
An amount of grain commensurate with the amount of grain fed into the tank is distributed from the grain tank b to the two obliquely installed upper grain flow passages t, t, and flows therethrough. Then, while flowing through the respective upper grain flow channels t, t, the grains are exposed to hot air and dried.

At this time, the amount of grains flowing from the grain tank b into the respective upper grain flow paths t, t is determined by the amount of grains flowing from the screw conveyor c to the confluence part and flowing down the lower grain flow path d. Since the grains are carried out, the amount of grain flows out from each upper grain flow path t to the confluence site, so the amount is approximately the same.

As explained above, the grain drying device according to the present invention has a plurality of upper grain flow passages t which are diagonally installed in a box-shaped machine body a with the upper end communicating with the grain tank b when viewed from the front. The lower end of ... is merged into a merging part, the upper end side of one lower grain flow path d extending downward is connected to the merging part, and the lower end of the lower grain flow path d is connected in the left-right direction. A discharge port w that opens toward one side is opened in the shape of a split along the front and back direction,
A screw conveyor c whose axial direction is along the front-rear direction is installed horizontally at the discharge port w so as to fluidize the inside of the lower grain flow path d and dam the flow of grains flowing out from the discharge port w. Therefore, the grains flowing out from the plurality of diagonally installed upper grain flow passages t..., merging, and flowing into the lower grain flow passage d are transferred to the screw conveyor c for carrying out the grains. The grains are scraped out and carried out from the lower end of the lower grain flow path d, and the control to uniformly equalize the flow rates of the plurality of upper grain flow paths t... A plurality of upper grain flow channels t
Since the flow of grains from ... is turned on and off by turning on and off the operation of the screw conveyor c, the shutter installed at the lower end of the grain flow path can be omitted and the grains can be transported out. While controlling the outflow of grains and carrying them out of the machine using a screw conveyor, it is now possible to uniformly equalize the amount of grains outflowing from each of the multiple grain flow paths. , the mechanism can be simplified without causing uneven drying.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a grain dryer in which the present invention can be implemented, FIG. 2 is a longitudinal sectional side view of the same, FIG. 3 is a transverse plan view of the same, and FIG. 4 is a front view of the same. Explanation of drawing symbols, A... Grain drying device, a...
Aircraft, b...grain tank, c...screw conveyor,
d...lower grain flow path, e...inlet, f...elevator, g...jamb table, h...air guide path, i...
Duct, j...hot air generator, k...blind plate, l...
...Exhaust duct, m...Duct, n...Exhaust fan, o...
Wind guide pipe, p...dust removal case, q...grain supply hopper, t...upper grain flow path, w...discharge port, 1
...Machine wall, 11...Grain lifting tower, 12...Ejection cylinder section,
13...bucket, 14...support means, 15...
Partition wall, 16... Communication hole, 17... Assembly seat, 18...
...Machine wall, 19...Intake port, 2...Bottom plate, 20...
Set bolt, 21... Communication port, 25... Connection gutter, 3... Top plate, 4... Floor plate, 6... Rotating shaft, 7
... Grain sending wing.

Claims (1)

[Claims] 1. In a box-shaped body a, when viewed from the front, a plurality of upper grain flow passages t are diagonally installed with their upper ends communicating with the grain tank b, and the lower ends thereof are merged into a merging part, The upper end side of one lower grain flow path d extending downward is connected to the confluence part, and the lower end of the lower grain flow path d is provided with a discharge port w that opens toward one side in the left-right direction. , a screw conveyor c for carrying out grains, which is opened in a split shape along the front-rear direction, and whose axial direction is along the front-rear direction, is connected to the discharge port w by flowing down the lower grain flow path d. The partition wall 9 of the lower grain flow passage d is installed horizontally so as to dam the flow of grains flowing out from w, and also blocks the upper part of the screw conveyor c.
A grain drying device characterized in that the grain drying device is installed in series.