JPH09318263A - Method for controlling shutter for changing-over grain circulation and grain discharging in grain dryving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a positive closing operation of a shutter for changing-over grain circulation and grain discharging to be performed in cooperation with a stopped state of the discharging operation. SOLUTION: A delay element showing several seconds is assembled in a circuit for a motor M for driving a shutter 3 for changing-over grain circulating operation and grain discharging operation in cooperation with a case when an operation of grain transporting device is turned off under an operation of a switch so as to stop grain discharging operation, and an operation of the shutter 3 is controlled in such a way that the closing operation of the shutter 3 is carried out with a delay of several seconds after stopping of operation of the grain transporting device for discharging the grain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a grain dryer that dries a grain harvested by a harvester such as a combine harvester in a field to a predetermined moisture value. The present invention relates to an improvement of a shutter operation control means for switching a grain circulation path to a dry discharge step in which a grain circulation path communicates with a discharge gutter when a drying step is performed while circulating and flowing by a conveying device.

[0002]

2. Description of the Related Art In a grain dryer A of the above-mentioned form, as shown in FIG. 1, the machine body 1 is usually assembled in a vertically high box shape and should be dried on the upper half side thereof. A storage section for storing the grains is formed, a drying section for bathing the drying air (hot air) on the grains is formed on the lower half side, and an elevator 2 is erected on the front surface of the machine body 1, The bottom of the fried tower 20 is connected and communicated with the terminal end in the transport direction of the lower conveyor 10 which is installed horizontally on the bottom of the fuselage 1, and the discharge cylinder 21 at the top of the fried tower 20 is connected to the fuselage as shown in FIG. 1 communicates with the starting end of the upper conveyor 11 in the conveying direction, and as shown in FIG. 2, an opening 12 is formed in the floor of the conveying gutter 111 on the lower surface of the screw 110 of the upper conveyor 11. The shutter 3 for opening and closing the opening 12 is provided on the lower surface side of the , The output shaft m of the motor M for driving the shutter is transmitted to the operating shaft 30 thereof, and the grain take-out port 22 is provided at the bottom of the discharge cylinder part 21 located below the shutter 3, The extraction gutter 4 is configured to be connected and communicated.

When the grain is dried,
By operating the motor M, the shutter 3 is rotated to the closed position, the opening 13 provided on the side surface of the machine body 1 to be opened and closed is opened, and the grain to be dried is dried from there. Is poured toward the lower conveyor 10 at the bottom of the machine body 1, and the lower conveyor 10 and the grain-lifting tower 20 of the elevator 2.
By the operation with the bucket conveyor 23 inside, the aircraft is lifted up toward the top of the machine body 1, and the operation with the upper conveyor 11 causes the storage section inside the machine body 1 to be stretched.

As a result, when the predetermined amount of tension has been completed, the drum shutter installed at the lower part of the drying section is operated while the lower conveyor 10, the elevator 2, the upper conveyor 11 and the like are operated. Then, the grains stretched in the storage portion are circulated and flowed so as to pass through the drying portion and return to the storage portion, and at the same time, the burner device 5 and the blower 6 are operated to supply hot air to the drying portion to dry When the grains are dried by blowing hot air on them, and the drying process up to a predetermined moisture value is completed, the burner device 5 is stopped to stop the supply of hot air to the drying unit and the shutter 3 is opened. The grain to be lifted by the elevator 2 is taken out of the machine from the take-out gutter 4,
It is used to rotate the shutter 3 to the closed position when the removal of the grain is completed, to re-engage the grain in the machine body 1 and to dry it.

The opening and closing operation of the shutter 3 is performed by operating a switch S ... For selecting work such as stretching, blowing, circulating, drying and discharging provided in a control box 7 on the front surface of the machine body 1. Thus, by turning on the discharge switch S for selecting the discharging operation among those switches, the shutter driving is performed at the same time when the grain conveying device such as the elevator 2 and the lower conveyor 10 is operated. When the motor M is operated to rotate the shutter 3 to the open position, the switch S is turned off, the grain transport device is turned off, and the discharging operation is stopped.
Simultaneously with the stoppage of the operation of the transport device such as the elevator 2 and the lower conveyor 10, the shutter driving motor M is operated to rotate the opening 12 to a position where it is closed, and then the switch S for drying or the like is selected. Then, it is made to correspond when the grain is made to flow longitudinally.

[0006]

DISCLOSURE OF THE INVENTION The grain dryer A of the above-described form has a discharge tube of the elevator 2 in order to switch between the state in which the grain in the machine body 1 is circulated and the state in which it is discharged to the outside. A switch for controlling the opening / closing operation of the shutter 3 provided so as to open / close the opening 12 opened on the floor surface of the transport gutter 111 of the upper conveyor 11 connected to the section 21 starts the discharging operation for discharging the grain outside the machine. The discharge operation is turned on / off so that the shutter drive motor M is driven to open by the operation of S and the discharge operation is stopped to be operated to be closed by the operation of the switch S so that the shutter drive motor M is driven to be closed. It is designed to be linked to.

The control of the opening / closing operation of the shutter 3 is such that when the discharging work for taking out the grain to the outside of the machine is stopped, the shutter 3 is closed in conjunction with the operation and the grain is circulated. When this is done, it becomes possible to properly prevent the grain from flowing out of the take-out trough 4 to the outside of the machine. When the grain is circulated so as to be stuck in the machine body 1, the shutter 3 is closed incompletely when the operation of the grain conveying device is stopped. There is a problem that a part of it may flow out of the take-out gutter 4 to the outside of the machine, and it may be necessary to stop the work and inspect it.

The present invention has been made in order to solve the problem that has occurred in the conventional means, and when the discharging work is stopped, the switching between the grain circulation and the grain discharging is performed in conjunction with it. It is an object of the present invention to provide a new means for ensuring that the closing operation of the shutter 3 for use is performed properly.

[0009]

The means of the present invention for achieving this object, however, were made based on the findings obtained through various studies for solving the above-mentioned problems. .

That is, the incomplete closing operation of the switching shutter 3 which occurs when the discharging operation is stopped, the operation of the grain conveying device such as the elevator 2 of the lower conveyor 10 is operated by operating the switch S. When stopped, the bucket conveyor 23 of the elevator 2 rotates by inertia (inertia),
The grain G ... adhering to the inner surface of the bucket 230 of the bucket conveyor 23 is discharged onto the upper surface of the screw 110 of the upper conveyor 11, and the grain G ... with the screw 110 and the transport gutter 111 on the lower surface thereof. It stagnates during the period, which causes a bite between the rim of the opening 12 opened on the floor surface of the transport gutter 111 and the upper surface of the shutter 3 to prevent the shutter 3 from completely closing, and the opening 12 is opened. It has become clear that it is because there is a gap.

As a countermeasure against this, the grains G ... Released from the bucket 230 of the bucket conveyor 23 by inertia flow on the inner surface of the transport gutter 111 after the operation of the grain transport device is stopped. The shutter 3 is closed when the grain G ... Is lost in the transport gutter 111 or when there is no flow in the transport gutter 111, and the shutter 3 is completely closed. Has come to be obtained.

Therefore, in the present invention, as a means for achieving the above object, the operation of the switch S is turned off by the operation of the switch S to stop the operation of discharging the grain. At the same time, a delay element of several seconds is incorporated in the circuit of the motor M for driving the shutter 3 that switches grain circulation and grain discharge in conjunction with it, and delays several seconds after the grain discharge work is stopped. The present invention proposes a shutter control method for switching between grain circulation and grain discharge in a grain dryer, which is characterized in that the shutter 3 is controlled so that the shutter 3 is closed. is there.

[0013]

The means of the present invention constructed as described above is provided with the switch S.
Operation stops the operation of the grain conveying device and stops the grain discharging operation, the shutter 3 for switching between grain circulation and grain discharging is closed and rotated in conjunction with the operation. However, the closing operation is an operation of a delay timer incorporated in the circuit of the motor M for driving the shutter 3, and an operation of turning off the operation operation of the grain conveying device such as the elevator 2. Since it is performed several seconds later, after the operation of the grain conveying device is turned off, the grains G attached to the inner surface of the bucket 230 of the bucket conveyor 23 due to the inertia are transferred to the conveying gutter 111 of the upper conveyor 11. Even if the grain G is released inside, the shutter 3 is closed and rotated after the grain G ... The closing rotation of the Gone to be performed in all,
Since the grain is circulated with the shutter 3 completely closed, when the grain is circulated and fluidized in the next drying operation, a part of the grain may flow out of the machine body 1. Will be properly prevented.

Further, since the shutter 3 is closed and rotated without leaving the grain in the transport gutter 111 and the grain is not caught, the discharge switch S is operated to operate the shutter 3. When the opening operation is interlocked, the operation of the shutter 3 is made smooth.

[0015]

Next, an embodiment will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 4 is a vertical sectional side view of a main part of a grain dryer A for carrying out the present invention. In FIG. 4, 1 is a machine body, 11 is an upper conveyor mounted on the top of the machine body, and 2 is a machine body. 1 shows an elevator which is erected on the front surface (right surface in the figure) of FIG.

As shown in FIG. 5, the grain drier A is assembled in a vertically high box shape, and a storage portion for storing grains to be dried is formed in the upper half side of the machine body 1 and the lower half is formed. On the side, a drying section for bathing dry air (hot air) generated by the burner device 5 on the grain is formed, and below the drying section, the grain in the storage section is passed down through the drying section. A rotary shutter is provided, a lower conveyor 10 is provided at the bottom of the machine body 1, and an elevator 2 that communicates with the terminal end of the machine body in the transport direction is erected on the front surface of the machine body 1,
The discharge cylinder portion 21 at the upper end of the fuselage 1 is of a normal form constituted by connecting and communicating the start end portion of the upper conveyor 11 mounted on the top of the fuselage 1, and the front side of the fuselage 1 is A control box 7 is provided.

On the front surface of the control box 7, there is provided a screen display a for displaying characters, numbers and pictures on a display screen composed of a liquid crystal panel, and touch switches arranged in a matrix on the display screen. The operation of each of the operating parts of the lower conveyor 10, the upper conveyor 11, the elevator 2 and the like is controlled by the above operation.

The display screen appearing on the screen display a is designed to be sequentially switched to different screens.
In the screen shown in Fig. 5, stake-in, ventilation, circulation,
Each of the switches S ... for drying and discharging is displayed, and by selecting and touching these switches, the respective operating parts are activated so as to adapt to the selected work.

The elevator 2 standing on the front of the machine body 1 stores the bucket conveyor 23 inside the fried tower 20 and discharges the grains to be pumped to the discharge cylinder 21 at the top of the fried tower 20. The starting end side of the upper conveyor 11 is projected into the discharging cylinder portion 21, and the grains discharged from the bucket 230 of the bucket conveyor 23 are taken over and conveyed to the storage portion in the machine body 1. Is done.

Further, the discharge cylinder portion 21 is provided with a take-out port 22 which opens to the outside at the bottom located below the starting end of the upper conveyor 11, and the take-out gutter 4 is provided in the take-out port 22. Connected.

Further, on the floor surface of the starting end portion of the transfer gutter 111 of the upper conveyor 11 which projects into the discharge cylinder portion 21, there is provided an opening 12 which is opened toward the outlet 22. An operating shaft 30 is provided between the above-mentioned outlet 22.
There is provided a shutter 3 which pivots to the center to open and close the opening 12, and the shutter 3 conducts an output shaft to an operating shaft 30 of the shutter 3 and pivots by the operation of a motor M to open and close the aperture 12. By doing so, the grains discharged from the bucket conveyor 23 into the discharge cylinder portion 21 are
The state of grain circulation that is inherited at the start end of No. 1 and fed into the machine body 1 and flows out from the opening 12 on the floor surface of the transfer gutter 111 at the start end of the upper conveyor 11 to the outlet 22 and is taken out of the machine. It is designed to switch to the state of the discharged grain.

Then, the operation of the motor M for rotating the operation shaft 30 of the shutter 3 is displayed on the screen of the screen display a on the front surface of the control box 7 provided on the front surface of the machine body 1 described above. Of the switches S ..., the discharge switch S is operated to operate the respective operation parts so as to perform the discharge work for taking out the grain in the machine body 1 to the outside of the machine, and the opening / closing operation of the shutter 3 I am trying to do.

That is, when the discharge switch S is turned on and the discharge operation is performed, the motor M operates in the direction of rotating the shutter 3 to the opening side to open the shutter 3 and thereafter the state is maintained. When the discharge switch S is turned off at the end of the discharging work to stop the operation of each operating portion, the motor M operates in the direction of rotating the shutter 3 to the closing side and closes the shutter 3. After that, it is kept at that position.

Further, when the discharging work is completed, the operation of the motor M for rotating the shutter 3 to the closed position has a delay timer incorporated in its drive circuit, and when the discharging is turned off, each operating portion is turned on. After the operation of
The shutter 3 is controlled to rotate to the closing side after a few seconds have elapsed.

[0026]

In the means of the present invention configured as described above, when the operation of the grain conveying device is stopped by the operation of the switch S and the grain discharging operation is stopped, the operation is interlocked with the operation. The shutter 3 for switching between grain circulation and grain discharge is closed and rotated, but the closing operation is performed by the operation of the delay timer incorporated in the circuit of the motor M for driving the shutter 3. Since the operation is turned off by a few seconds from the operation of turning off the operation of the grain conveyor such as the elevator 2, after the operation of the grain conveyor is turned off, the bucket 230 of the bucket conveyor 23 is moved by inertia.
Even if the grains G attached to the inner surface of the transport gutter are discharged into the transport gutter 111 of the upper conveyor 11, the grain G ... flows out from the opening 12 on the floor surface of the transport gutter 111, and then the shutter 3 is released. The closing rotation of the shutter 3 is not performed incompletely due to the biting of the grain G, and the grain is circulated in the completely closed state. Therefore, in the next drying operation, when the grains are circulated, a part of the grains can be properly prevented from flowing out of the machine.

Further, since the shutter 3 is closed and rotated without leaving the grains in the transport gutter 111 and the grains are not caught, the discharge switch S is operated to operate the shutter 3. When the opening operation is interlocked, the operation of the shutter 3 is made smooth.

[Brief description of drawings]

FIG. 1 is a perspective view of a grain dryer.

FIG. 2 is a vertical sectional front view of a main part of the same grain dryer.

FIG. 3 is an explanatory diagram of an operation of a shutter for switching the grain dryer of the same as above.

FIG. 4 is a vertical sectional side view of a main part of a grain dryer used for carrying out the present invention.

FIG. 5 is a partially cutaway perspective view of the same grain dryer.

[Explanation of symbols]

A ... Grain dryer, a ... Screen display, G ... Grain, S ... Switch, M ... Motor, m ... Output shaft, 1 ... Machine, 10 ... Lower conveyor, 11 ... Upper conveyor, 110 ... Screw, 111 ... conveyor gutter, 12 ... opening, 13 ... tightening opening, 2 ...
Elevator, 20 ... Grain tower, 21 ... Discharge cylinder part, 22 ... Takeout port, 23 ... Bucket conveyor, 230 ... Bucket, 24
... Take-out gutter, 3 ... Shutter, 30 ... Actuating shaft, 4 ... Take-out gutter, 5 ... Burner device, 6 ... Blower, 7 ... Control box.

Claims (1)

[Claims] 1. When the operation of the switch S is turned off to stop the operation of the grain conveying device to stop the grain discharging operation, the grain circulation and the grain discharging are switched in conjunction with the operation. By incorporating a delay element of several seconds into the circuit of the motor M for driving the shutter 3, the shutter 3 is closed with a delay of several seconds after the operation of the grain transport device for grain discharge work is stopped. A method for controlling a shutter for switching between grain circulation and grain discharge in a grain dryer, characterized in that the operation of the shutter 3 is controlled.