JP3047087B2 - Grain drying facility - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint grain drying facility such as a country elevator which comprises a receiving section, a storage / drying section, a preparation / shipping section, etc., in which received grains are dried, packed and shipped.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open Publication No.
As shown, a storage tank equipped with a room temperature constant humidity dryer is provided,
There is a technique for drying and storing the received grain .

[0003]

SUMMARY OF THE INVENTION The prior art includes a plurality of
Storage tanks will be installed.
Since each machine is installed, installation space is reduced and equipment
There is a problem that cost reduction and the like cannot be easily performed.
Therefore, as shown in Japanese Utility Model Laid-Open Publication No. 3-91737, a plurality of
One blower is connected to a storage tank via a ventilation duct
There is a technology to make it . However, all storage tanks are empty
Or all air dampers are closed by the end of grain drying
By doing so, the air duct is sealed and
Wind pressure is high, for example, grain is thrown into empty storage tanks
Grain that has been dried or has finished drying
The air damper when removing air from the storage tank
The air damper locks due to the wind pressure in the air duct.
The electric motor for air damper opening / closing control is
Overload operation, the overcurrent detector operates, and grain drying
There is a problem that the work or grain removal work is stopped .

[0004]

Means for Solving the Problems] However, the present invention includes a plurality
Cold Teishime through the air duct grain drying storage tank
Dry air is supplied from the dryer at room temperature and constant humidity.
Weigh the grain and moisture and send it to each storage tank.
Grain that opens and closes an air damper that connects the wind duct
When the grain weight exceeds a specified value in a drying facility
Open the air damper of the storage tank and let the grain moisture
Close the storage tank air damper when it falls
At the same time, the air dampers of all storage tanks are closed
Sometimes the air damper in the storage tank where the last grain was
It is configured to automatically open and hold, so that grains can be thrown.
Drying work with the air damper of the stored storage tank opened
Is started and the air damper of the storage tank where the grain is dried is
Closed to finish the drying operation.
Easily reduce equipment costs by sharing a constant humidity dryer
And at least the last storage of grain
The tank air dampers are held open and all air dampers are
Prevents the wind pressure in the air duct from increasing due to the closing movement of
The air damper may be
Locking problems can be easily eliminated, and grain drying and
It is possible to easily improve the dispensing workability .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram of a constant-temperature and constant-humidity drying control circuit, and FIG. 2 is an explanatory diagram of a grain storage unit, and includes a receiving hopper (1) for receiving raw rice as a grain carried by an individual and a loading port, and the receiving hopper (1). Rough sorting machine (4) for removing contaminants from the incoming paddy brought in from 1) via the receiving conveyor (2) and the elevator (3)
A two-batch grain weighing machine (5), which is a measuring means for measuring weight and moisture for each individual and each cargo port after rough selection, constitutes a receiving section (6). A grain drying storage tank for carrying and storing and drying the raw rice from the weighing machine (5) through the bin loading elevator (7), the switching valve (8), and the bin loading conveyors (9) and (10). Multiple storage bins (1
1) ..., a bin discharge conveyor (13) which is a grain transport device for receiving and transporting paddy from each of these bins (11) via each shutter (12) ..., and a feed from the feed end of the conveyor (13). A storage / drying unit (15) is provided by a weighing / lifting machine (14) that feeds the paddy into the weighing machine (5), measures the weight and moisture, and sends it to a set bin (11) or a preparation / shipping unit in the next process, etc. The rice receiving center (6), the storage / drying section (15), and the preparation / shipping section in the next step constitute a rice center or a country elevator.

As shown in FIGS. 3 and 4, each storage bin (1
1) are provided so as to store 50 to 70 tons of raw paddy, and are connected at the bottom of each storage bin (11) to a dehumidifier (16) and a blower (17), which are constant temperature and constant humidity dryers. An electric damper is provided through a rack gear mechanism (20) and an opening / closing shaft (20a) in each of the storage bins (11)... In each of the air outlets (19) of the duct (18) facing the bottom. An air damper (2) which is slid open and closed left and right by an open / close motor (21).
2) to provide a blower (17) from the dehumidifier (16)
Is supplied to the bottom of the bin (11) through the air outlet (19) through the air outlet (19), and the rice pad in the bin (11) is stored while being dried. ing.

The dehumidifier (16) comprises a cooling / dehumidifying evaporator (23), a condenser for normal temperature restoration (24),
And a cooling scroll compressor (25) with adjustable step output and a dehumidification control flap (2).
6) An outside air intake duct (27) for taking in the atmosphere (humid air) from above through ... and a constant humidity damper (28)
Through (29), the room temperature dehumidified air from the condenser (24) and the air from the intake duct (27) are mixed to form room temperature constant humidity air, and the room temperature constant humidity air is supplied to the blower (1).
7) and is blown to each bin (11)...

As shown in FIG. 5, a grain transport sensor (30) for detecting the presence or absence of paddy transported on the conveyor (13) is provided near the feed end of the bin discharge conveyor (13). The sensor (30) has a sensor body (32) having a portion (31) and a permanent magnet (34) attached to a swingable sensor lever (33). ) Swings toward the conveyance direction side by a certain angle, the magnet (34) is detected by the detection unit (3).
1) The sensor (30) is turned on by pulling it apart from the sensor (30), and the sensor (30) is turned off when the magnet (34) and the detection unit (31) do not pass through the paddy. ing.

A grain receiving chute (35) is interposed between the feed end of the bin discharge conveyor (13) and a receiving port (14a) of the weighing elevator (14). A sound sensor (3) for detecting a drop impact sound of the paddy at the paddy drop position from the conveyor (13).
6), the sensor (36) is turned on when an impact sound of a certain level or more is detected, and the other sensors are turned off, so that a combination of the transport sensor (30) and the sound sensor (36) is used. It is configured to reliably detect the transport state of the discharge conveyor (13).

A weighing machine (5), sensors (30) and (36), and a damper (2) are provided to a drying circuit (37), which is a blower control means constituted by a microcomputer.
2) Damper open / close switch (38) (3)
9) and the elevator (7) (1)
4) and a rotation control circuit (40) for operating the conveyors (9) (10) (13) and the respective shutters (12) to exchange the paddy of each bin (11). The compressor (25) of the dehumidifier (16) and the blower motor (17) of the blower (17)
Drying power supply circuit (41) for turning on / off the driving of a)
A damper opening / closing motor (21) for opening and closing the damper (22); and an alarm display device (42) including a CRT or the like.
Are connected to the drying circuit (37), and the opening and closing of the damper (22) and the bin discharge conveyor (1) are performed based on the detection of the weighing machine (5) and the sensors (30) and (36).
The drive control of 3) is configured to be performed.

As is apparent from the above, a plurality of grain drying
Ventilation duct (1) to the storage bin (11)
8) a dehumidifier (16), which is a constant-temperature constant-humidity dryer, and
A normal temperature and constant humidity air is supplied from the blower (17),
Measure the weight and moisture of the grain in each storage bin (11), and
The air duct (18) communicates with the storage bin (11).
In a grain drying facility that opens and closes the damper (22)
When the grain weight exceeds a predetermined value, the storage bin (1
1) Open the air damper (22) to set the grain moisture
The air damper (2) of the storage bin (11)
2) and close all storage bins (11).
Finally, when the damper (22) is closed, the grain is thrown.
The air damper (22) of the storage tank (11)
And keep it open. And the storage bin into which the grain was put
(11) The air damper (22) is opened and drying work
Started and dry air in storage bin (11) with dry grain
The drying operation is completed when the pad (22) is closed and a plurality of storages are performed.
Dehumidifier (16) and blower (17) are shared in bottle (11).
To reduce equipment costs, etc.
Lastly, the air damper in the storage bin (11) into which the grain was put
(22) is held open and all air dampers (22)
The closing action increases the wind pressure in the air duct (18).
By increasing the wind pressure in the air duct (18)
Eliminates the problem that the air damper (22) is locked,
Improve the drying and unloading workability.

This embodiment is configured as described above, and the operation of the embodiment will be described below with reference to the flowcharts of FIGS.

As shown in FIG. 6, the harvested paddy brought into the receiving area of the receiving section (6) is measured for data such as varieties and weights for each individual and for each cargo port, and after these data are read in the operation room. Then, the kind data is transmitted to the central control unit, and the input bin (11) for each kind is automatically selected, and
After the weight and moisture of the paddy put into the bin (11) are measured by the weighing machine (5), the paddy is put into a predetermined bin (11).

Further, as shown in FIG. 7, during the rotation operation after a certain drying time has passed after the paddy in the bin (11) has been charged, the charging conveyor (9) (10).
The elevators (7) (14) and the discharge conveyor (13) are driven in this order, and then the shutter (12) of the bin (11) is opened to discharge the paddy and to the selected bin (11). Rotation work, which is a transfer work of paddy, is started. Then, as shown in FIG. 9, when a certain period of time has elapsed since the start, and when the transport and the sound sensor (30) (36) are in the on-pad detection state, it is determined that a large amount of paddy is being transported. This rotation operation is continued, and the conveyance sensor (30) is turned off and the sound sensor (3) is turned off.
When 6) is on, it is determined that a small amount of paddy is being conveyed, and a warning is displayed on the display device (39) indicating "rotation small amount" to continue the rotation operation, and the conveyance sensor (30)
Is turned on and the sound sensor (36) is turned off, it is determined that a jam has occurred on the transport path between the sensors (30) and (36), and a warning "rotation jamming" has been displayed, and the discharge conveyor Rotation work such as driving stop of (13) is interrupted, and each sensor (30) (3)
When any of 6) does not detect the off-paddy detection, it is determined that the discharge operation has been completed and the discharge conveyor (13)
Driving is stopped in the order of the elevators (14) and (7) and the loading conveyors (8) and (9), and the rotation operation is completed.

On the other hand, as shown in FIG. 8, when the weight of paddy to be charged and stored in each bin (11) is equal to or more than a predetermined weight (for example, 3 tons) by the weighing machine (5), the input bin (11) The damper (22) is automatically controlled to “open”, and the weighing machine (5) confirms that the moisture value of the paddy in the input bin (11) becomes equal to or less than a set value (for example, 18%). When detecting, the damper (22) of the input bin (11) is automatically controlled to be "closed".
At this time, when the dampers (22) of all the bins (11) are in the fully closed state, the bin (1
Only the damper (22) of (1) is automatically operated to be "open" so that at least one damper (22) is kept in the "open" state, and the low pressure state is maintained without increasing the wind pressure in the duct (18). Is to keep it. That is, each damper (2
When an attempt is made to open any of the dampers (22) from the fully closed state of 2), there is a disadvantage that the electric motor (21) for opening and closing the damper is conventionally overloaded and the overcurrent detector is activated. This is prevented in advance.

In the above-described embodiment, the configuration is shown in which the weight and moisture measurement performed during rotation is shared by the load receiving weighing machine (5). However, a dedicated weighing machine is provided separately from the weighing machine (5). It may be a configuration for performing.

In the above embodiment, all the dampers (2
Although the configuration in which the damper (22) of the bin (11) which was put in last is opened when (2) is closed has been described, the display device (39) displays a message of "air damper fully closed" and then performs drying. The driving of the dehumidifier (16) and the blower (17), which are the devices, may be stopped.

[0018]

As apparent from the above embodiment the present invention is the air duct into a plurality of grain drying storage tank (11)
From the room temperature constant humidity dryer (16) (17) via (18)
While supplying the constant temperature and constant humidity air, each storage tank (1
Measure the weight and moisture of the grain of 1), and store in each storage tank (1
An air damper (2) for communicating an air duct (18) with 1)
2) Grain weight in a grain drying facility that opens and closes
When the air pressure exceeds a predetermined value, the air tank of the storage tank (11) is
Opening the damper (22), the grain moisture is below the setting
Sometimes the air damper (22) of the storage tank (11) is closed
And air dampers of all storage tanks (11)
When (22) is closed, the last storage of grain
Automatically open the air damper (22) of the storage tank (11)
Storage that is configured to hold and is filled with grain
The air damper (22) of the tank (11) is opened and dried
Work has commenced and the storage tanks (11)
When the air damper (22) is closed and the drying operation is completed,
Room temperature constant humidity dryers (16) (1)
7) To easily reduce equipment costs etc. by sharing
And at least the last storage of grain
The air damper (22) of the storage tank (11) is held open.
And all the air dampers (22) are closed.
G (18) can be prevented from increasing
(18) to increase the air pressure in the air damper (22).
The problem of locking the grain can be easily eliminated,
Drying and unloading workability can be easily improved.
It can be .

[Brief description of the drawings]

FIG. 1 is a diagram of a drying circuit in a storage bin.

FIG. 2 is a flow sheet of a drying unit.

FIG. 3 is an explanatory diagram of a room-temperature constant-humidity drying unit.

FIG. 4 is an explanatory view of the appearance of a room-temperature constant-humidity drying unit.

FIG. 5 is an explanatory diagram of a sensor unit.

FIG. 6 is a flowchart of a receiving operation.

FIG. 7 is a flowchart of rotation control.

FIG. 8 is a flowchart of damper control.

FIG. 9 is a detection detection table diagram of a sensor.

[Explanation of symbols]

(11) Storage bin (storage tank) (16) Dehumidifier (room temperature / humidity dryer) (17) Blower (room temperature / humidity dryer) (18) Ventilation duct (22) Air damper

Claims (1)

(57) [Claims] 1. A plurality of grain drying storage tanks (11).
Room temperature constant humidity dryer (16) through air duct (18)
(17) Supply normal temperature and constant humidity air and store each
Measure the weight and moisture of the grains in the tank (11) and store
Air for communicating the ventilation duct (18) with the tank (11)
In a grain drying facility that opens and closes the damper (22)
The storage tank (1
1) Open the air damper (22) to set the grain moisture
Air damper of storage tank (11) when
(22) is closed and all storage tanks (1
Finally, when the air damper (22) of 1) is closed.
The air damper (2) of the storage tank (11) into which the grains are put
2. A grain drying facility characterized in that 2) is automatically opened and held .