JPS6029877B2 - grain dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grain dryer, and a conventional grain dryer detects the dry state of grains discharged from the dryer and determines whether drying is completed or not. If the moisture content below was detected, the entire dryer would be stopped or a warning would be issued.

In addition, as another follower device, depending on the efficiency of the dryer and the condition of the grain to be dried (quality, initial drying state, etc.), the number of passes through the dryer is predicted in advance and the finished grain is prepared.
The drying process was completed by setting the time, and then the material was sent to the finishing tank. For this reason, the former case has the disadvantage that continuous drying cannot be carried out and the working efficiency is extremely poor, while the latter has the disadvantage that accurate drying cannot be achieved.

Therefore, the present invention has taken the following technical measures for the purpose of solving the above-mentioned drawbacks.

That is, in a circulation type drying equipment in which the grains discharged from the dryer 2 are sent to a plurality of conditioning tanks 3a, 3b, 3c, and 3d, and then returned to the dryer 2 from the conditioning tanks, In addition to the tempering tank, a finishing tank 5 is provided, and a moisture content detection device 16 for detecting the moisture content of the grains is provided in the middle of the transfer route for sending the grains from the dryer to the tempering tank. When the detection device 16 detects a moisture content lower than a predetermined moisture content, the grain supply to the tempering tank is stopped and the grain is automatically controlled to be supplied to the finishing tank 5. . This invention will be described in detail based on an embodiment shown in the drawings.

1 is a filling tank, which stores grain that has not yet dried.

Reference numeral 2 denotes a dryer, which is of a flow-down type that blows hot air to dry the grains while the grains are flowing down from the upper supply port A part to the lower discharge roller part.

Note that the present invention is not limited to this embodiment. 3a, 3b, 3c
, 3d are thermal refining tanks, which are arranged in a line below the horizontally installed conveyor belt 4 in the upper part. 4b. 4c, 4d, and 4e are provided so that each discharge port corresponds to a lower refining tank and a finishing tank, respectively.

The shutters of the discharge ports 4a, 4b, 4c, 4d, and 4e are provided in the form of electromagnetic valves.

Further, the lower discharge ports of the refining tanks 3a, 3b, 3c, and 3d and the finishing tank 5 provided at the final end thereof are provided in two directions, respectively, and the two discharges OA and B are electromagnetic. The valve 301 is thus provided so as to be switchable to either side.

Numerals 6, 7, 8, and 9 are all grain raising machines, and among these, the grain raising machine 6 transports the grains from the pitching tank 1 onto the conveyor 1.
The sheller 7 receives grains via a conveyor 11 provided at the lower part of the dryer 2, and receives the grains through a conveyor 11 provided at the bottom of the dryer 2, and then supplies the grains to the supply tray of the dryer 2. The grain raising machine 8 is a conveyor 12 that receives and transfers the grains discharged to the discharge port A side at the lower part of the tempering tanks 3a, 3b, 3c, 3d, and 3e.
The dryer receives grains from the dryer 2 and supplies the grains again to the supply port A of the dryer 2, and furthermore, the raised grains 9 are
Conveyor 13 that receives and transfers grains discharged to the B side
It receives grain from the tank and sends it to the finishing tank 14.

Reference numeral 16 denotes a moisture content detection device, which is installed in the middle of the chute that transfers the grains from the grain raising machine 7 to the tension transfer conveyor 4, and measures the electrical resistance by passing an electric current through the grains being transported. The water content is measured by this method.

It goes without saying that this moisture content detection device may be of a high frequency type or the like in addition to the electric resistance type. The moisture content detection device 16 is connected to the outlet 4a of the above-mentioned conveyor 4.
, 4b, 4c, 4d shutters and refining tank 3a
, 3b, 3c, 3d and finishing tank 5 discharge ports A, B
The switching electromagnetic valve is in motion, and the moisture content detection device 1
When the grains 6 are dried to the finished state and a moisture content of less than a predetermined value is detected, the discharge ports 4a, 4b, 4c, 4d
The shutters of the finishing tank 5 are closed, the shutter of the discharge port 4e is opened, and the switching solenoid valves of the discharge ports A and B of the finishing tank 5 are configured to move so that the grains are discharged to the discharge port B side. .

In addition, in the example, the tanks 3a, 3b, 3c, 3d for sea bream
The structure is such that the 3d side, which is the last one, can be used as a finishing tank. In addition, the symbol SW in the figure is a level switch that detects the filling state of grains, 17 is a control mechanism section, and 18 is a central processing unit (CPU).
), 19 indicates an analog-to-digital converter.

Further, the large arrow d drawn in FIG. 1 indicates the flow of the persimmon grains, the dotted line arrow -1 indicates the control command, and the solid line arrow → indicates the lines of the detection signal from the moisture content detection device and the level switch, respectively.
Furthermore, FIG. 2 shows a flow chart of the drying operation, and the explanation thereof will be omitted since it is obvious from the explanation written in the drawing. Next, to explain the operation of the above example, undried grains (paddy) brought in by farmers are put into a holding tank, and then transferred to a conveyor 10.
The grains are sent to the dryer 2 via the grain raising machine 6, dried by the dryer 2, and discharged onto the conveyor 11, and further transferred from the conveyor 1 to the grain raising machine 7 for tensioning. The fish are sent to a conveyor 4, and from this transfer conveyor 4, they are sent to the lower sea bream tanks 3a, 3b, 3c, 3d and the finishing tank 5 in this order. At this time, the moisture content detection device 16
detects the undried state, so the discharge ports 4a, 4b, 4c, 4d and 4e of the tension transfer conveyor 4 are kept open. In addition, refining tanks 3a and 3b
, 3c, 3d and the finishing tank 5 outlet are open on the A side □
and the B side is closed. These commands are sent from the moisture content detection device 16 to the analog/digital converter 19.
, the CPU 18 and further controlled via the control mechanism section 17.
In this way, the grains tempered in each tempering tank and discharged are supplied onto the conveyor 12 from the discharge port A side, and sent to the dryer 2 again via the grain raising machine 8 for circulation. undergo drying. The grains are gradually dried as they pass through the dryer 2 several times, and finally, when the moisture content detection device detects a moisture content below a certain value indicating completion of drying, at this point, the grains are pasted. Discharge ports 4a and 4b of transfer conveyor 4
, 4c and 4d are automatically closed with a shutter, the shutters are switched so that the grains are supplied only to the finishing tank 5, and the discharge port of the finishing tank 5 is switched from the A side to the B side.

(At this time, it is better to use a timer to switch after a certain period of time.) Then, the grains in the finishing tank 5 are discharged from the discharge port B onto the conveyor 13 and passed through the grain raising machine 9 to the finishing completion tank 14. send grain to

In addition, during high-speed discharge when shell grains cannot be taken out only from the finishing tank 5, the CP river should remember this in advance and use the rear tempering tank 3d or 3c.
can be used in the finishing tank 5. Since this invention has the above-mentioned configuration, when the drying completion signal is received when the moisture content of the grains during circulation drying is below a certain level, the supply of the grains to the tempering tank is stopped and the grains are automatically transferred to the finishing tank side. Since the grains can be supplied and taken out in a precise manner, the efficiency is extremely high, and moreover, the grains can be taken out in an accurate dry state.

Note that it is extremely easy to adjust the water content and take out the water, and furthermore, when configured as in the embodiment, the refining tank can be used as a finishing tank and the configuration can be simplified.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 showing a system diagram and FIG. 2 showing a flowchart. In the figure, 2 is a dryer, 3a, 3b, 3c, and 3d are refining tanks, 5 is a finishing tank, and 16 is a moisture content detection device. Figure 2 Figure 1

Claims (1)

[Claims] 1 In a circulating drying facility in which the grains discharged from the dryer are sent to a plurality of tempering tanks arranged and returned from the tempering tank to the dryer, in addition to the tempering tank, there is also a finishing A tank is provided, and a moisture content detection device for detecting the moisture content of the grains is provided in the middle of the transfer route for sending the grains from the dryer to the tempering tank, and this moisture content detection device detects moisture content below a predetermined moisture content. A grain dryer characterized in that, when the grain dryer is detected, the grain dryer is automatically controlled so as to stop supplying grains to the tempering tank and supply the grains to the finishing tank.