JPH08152265A - Grain circulation controller for grain dryer - Google Patents

Abstract

PURPOSE: To effectively take out grain sample from the bucket of an elevator after a drying operation is finished by stopping a circulating motor for driving the elevator, etc., so that the grain is scraped by the bucket when grain moisture reaches a finished moisture value. CONSTITUTION: Hot air generated from a burner and an exhaust fan 7 is supplied to grain flowing down by the rotation of a feed valve 10 to be dried, and the dried grain is circulated to a grain tank 2 via lower and upper feed spirals 15, 17 and a grain lifter 11 to be finished to a predetermined moisture value. In such a dryer, an intermittent signal is output to a valve motor interlocked with the valve 10. A controller for outputting a continuous operation signal to a circulating motor for driving the lifter 10 and the spirals 15, 17 is provided, and so controls as to output a stop signal to the motor from the driving of the motor to the lapse of a predetermined time after the stop is output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain circulation control device in a grain dryer.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
There is a configuration in which the grain is gradually flowed down by the rotation of the feeding valve, and the rotation of the feeding valve is performed by intermittent rotation to finely adjust the feeding amount. Further, the grain drying is stopped by receiving a stop signal from the control unit when the moisture content of the grain is finished to a predetermined level.

The finished grain is taken out as a sample, and the moisture value and the like are judged by other inspection means. Specifically, the grain remaining in the bucket of the elevator is taken out by hand through an outlet provided on an appropriate side wall of the elevator.
However, when the feeding valve is intermittently rotated, the grain transfer from the lower transfer spiral to the elevator is intermittent, and the elevator bucket does not pump up depending on the timing. When the stop signal is output, the grain sample cannot be taken out from the outlet.

[0004]

The present invention solves the above-mentioned drawbacks.

[0005]

When the grain moisture reaches the finishing moisture value, the controller outputs a stop signal. At this time, if the delivery valve is in rotation interlocking or within a predetermined time after the stop, the circulation motor driving the elevator and the like is immediately output a signal to stop and also stops. Grain is scooped in the bucket, and the grain sample can be properly taken out from the outlet of the elevator.

Further, if the delivery valve is interrupted at the time when it is judged that the above-mentioned finished moisture value has been reached, the stop signal output is waited until the driving of the delivery valve is started next time, and the predetermined post-circulation is performed. The motor stops. Therefore, grain is newly supplied to the lower side of the elevator, and the bucket can scoop this.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a machine frame of a grain dryer, and a storage tank 2, a drying chamber 3, and a grain collecting chamber 4 are vertically installed from the upper part in the frame, and the drying chamber 3 includes a burner cylinder having a burner 5. The grain flow-down passages 9, 9 are formed between the hot air chamber 6 leading to the air passage and the exhaust air chamber 8 leading to the fan body having the suction fan 7, and the feeding valves 10, 10 provided at the lower portions of the respective flow passages 9, 9. With the rotation of, the grains flowing down by a predetermined amount are exposed to hot air and dried.

Outside the machine frame 1, a grain raising machine 11 for raising and returning the grains collected on one side of the grain collecting chamber 4 to the storage tank 2 is provided upright. The grain raising machine 11 has a pair of upper and lower drive pulleys 12 inside.
And a driven pulley, and a belt 14 with a bucket 13 is wound around it, and the dry grain transferred to one side can be transferred to a scooping upper part by a lower transfer spiral 15 provided laterally below the grain collection chamber 4. I am trying. Grains scooped by the grain raising machine 11 and thrown at the upper portion are guided to the starting end side of a transfer gutter 18 provided with an upper transfer spiral 17 through a spout opening 16. The grain horizontally transferred by the transfer spiral 17 is guided to the rotary diffusion plate 19 arranged in the upper center of the storage tank 2,
It is configured to be diffused and dropped into the storage tank 2.

The grain elevator 11, upper and lower transfer spirals 1
The grain circulation system consisting of 5, 17 is rotationally interlocked by an elevator motor 20 fixed to the upper side wall of the frame of the grain raiser 11. A shaft 21 of the upper transfer spiral 16 and a shaft 22 of the drive pulley 12 which winds the bucket belt 14 of the grain elevator 11 are directly rotated with two drive belts (not shown) on the drive shaft of the motor 20. Work together.

The delivery valves 10 and 10 have a structure in which a valve motor 23 is interlocked with the rotation. A supply port 25 is provided on the side wall 24 at a position of an appropriate height of the grain raising machine 11 so as to correspond to the left and right space between the forward stroke A and the backward stroke B of the bucket belt 14, and the supply port 25 is provided.
A moisture meter 26 is detachably provided in the section. Moisture meter 26
Is a known configuration in which one of the sample grains is crushed between a pair of electrode rolls and its resistance value is electrically processed to be converted into a grain moisture value.

The side wall of the elevator 11 facing the bucket 13 is provided with a grain sample outlet 27 and is covered with a removable transparent lid 28. The burner 5 is in the form of a vaporization type burner, and has a combustion cylinder 30 on the front side of the blower cylinder 29.
And a burner motor 31 is provided on the blower tube 29,
The vaporization cylinder 32 and a fan 34 for introducing combustion air from the air inlet 33 are rotationally interlocked. A combustion plate having gas ejection holes is fitted in the combustion cylinder 30. The combustion cylinder 30 partially forms a bulging portion in a front view, and an igniter 35 as an ignition means including a pair of electrode portions is provided on the bulging portion. The igniter 35 is configured to be able to ignite the atomized fuel of kerosene supplied from the nozzle.

The burner 5 is a guide wind tunnel 4 having a rectangular cross section.
It is fixed to the two inlets by a leg portion 43 and a connecting portion 44 that also serves as a handle, and is configured to be mounted together with these guide wind tunnels 42 on a burner cylinder 45 communicating with the hot air chamber 6.
The vaporization burner 5 having the above-described configuration is configured such that kerosene as fuel is supplied by driving an electromagnetic pump 46 provided on the lower surface of the lower pedestal portion of the guide wind tunnel 42, and is ignited and burned by electric discharge of the igniter 35. In addition, the burner 5 is configured to be capable of selecting an intermittent combustion mode and a continuous combustion mode, and by comparing the hot air temperature detected by the hot air temperature sensor 47 with a set temperature, continuous combustion is adopted when a predetermined heating amount or more is required. When the heating amount is controlled to be small, the on-time t of the electromagnetic pump 46 is changed and controlled so that the hot air temperature is within the predetermined range of the set temperature.

FIG. 4 is a control block diagram. The controller 49 of the controller 48 provided in the burner cylinder 45 has
Mode switches 51, 52, 53, 54 for feeding, drying, discharging, and stopping arranged on the operation panel 50, setting switches 55, 56, 57 for setting the grain type, finishing moisture, and amount of feeding, for setting the drying time. In addition to the input signals from the increase / decrease switches 58 and 59, various detection signals from the moisture meter 26, the frame rod, the hot air temperature sensor 47, the outside air temperature sensor 60, the air volume sensor 61, and the like are input. On the other hand, as output signals, there are a drive signal for driving the circulation system drive motor for the elevator motor 20, the valve motor 23, etc., a drive signal for the burner 5, and the like. Note that the burner drive signal includes an ON / OFF signal of the electromagnetic pump 46, a magnitude supply signal, a rotation speed command signal of the burner motor 31, an igniter 35 energization signal, and the like.

The valve motor 23 is intermittently driven, and the intermittent command signal has a fixed cycle (30 seconds), an on time T, and a circulation drying operation mode (same as the ventilation operation mode).
And the discharge operation mode, or the power supply frequency is 50 Hz or 60 Hz. The on-time T is generally set by the control unit 49 so that the discharge operation mode is long and the 50 Hz power supply is long.

The control unit 49 also has the following functions.
That is, when it is determined by the detection signal processing from the moisture meter 26 that the finished moisture has been reached, the controller 49 outputs a stop signal. Receiving this stop signal, the circulation motor 20, the valve motor 23 for the delivery valve, or the burner 5 stops its operation. The details of how to stop the circulation motor 20 and the valve motor 23 are as follows. That is, when the stop signal indicates that the valve motor 23, which operates intermittently, is operating or within a certain time t ₁ after the stop (α in FIG. 6), the circulation motor 20 is immediately stopped (FIG. 6).
(I)). When the stop signal is output while the valve motor 23 is stopped (β in the figure), the circulation motor 20 is not stopped immediately, and the operation of the valve motor 23 is waited for next time, and a predetermined time t ₂ is set after the start-up. Stop processing (Fig. 6)
(B)). Here, the predetermined time t ₁ is the supply valve 10, ₁
It is set to a value commensurate with the time required from 0 to the bucket 13 via the lower transfer spiral to reach the outlet 27, and the predetermined time t ₂ is (T−t ₂ ) time from the lower transfer spiral 15 to the lower part of the elevator 11. The amount of grain supplied to the above is set to a value that does not cause clogging of the lower portion of the elevator 11.

The operation of the above example will be described. A predetermined amount of grain is loaded into the storage tank 2 from the loading hopper using the grain elevator 11. Next, the grain type, finishing moisture, etc. are set and the drying operation is started. Grains in the storage tank 2 are exposed to hot air while flowing down the drying chamber 3 and reach the grain collecting chamber 4. The grain that has received the hot air is transferred to one side by the lower transfer spiral, is fried by the grain raising machine 11, is taken over by the upper transfer spiral 16, reaches the inside of the storage tank 2 again, and is subjected to tempering for a while. The intermittent command signal of the valve motor 23 is output at an on-time T that is predetermined by the type of operation mode and the power supply frequency of 50/60 Hz.

By repeating such a process, the drying is completed when the preset moisture content value is reached. Upon completion of the above-mentioned drying, the control unit 49 outputs a stop signal. At this time, if the feeding valves 10, 10 are in rotation interlocking or within a predetermined time t ₁ after the stop, the elevator or the like immediately. A signal is also output to stop the circulation motor 20 that is driving the motor, and the circulation motor 20 stops. Grain is scooped in the bucket 13, and the grain sample can be appropriately taken out from the outlet 28 of the elevator 11.

If the delivery valves 10, 10 are suspended at the time when it is determined that the final water content has been reached, the next drive of the delivery valves 10, 10 is started and the predetermined time t is reached. _The circulation motor 20 is stopped after waiting for the stop signal to be output until the elapse of ₂ . Therefore, the grain is newly supplied to the lower side of the elevator 11, and the bucket 13 can scoop this.

In the above embodiment, the stop of the circulation motor 20 is not related to the OFF operation of the electromagnetic valve 46 of the burner 5, but the valve motor 23 is set to the electromagnetic valve 4 of the burner 5.
6 During so-called post-purge that is executed after stop output,
A configuration may be adopted in which the circulation motor 20 is continuously driven and the circulation motor 20 is stopped when the post-purge is stopped (see FIG. 7).
(A)) After the post-purging, the valve motor 23 is continuously operated for a while, and the circulation motor 20 is stopped in accordance with the stop (FIG. (B)). It is possible to change the physical configuration.

FIG. 8 shows a safety guard on the roof 70 of the grain dryer, which has a side plate 2a for the storage tank 2 prepared in advance as an enclosure. Since the side plate 2a of the tank 2 is used and no special specifications are required,
It is possible to reduce the mold cost in manufacturing. 71 is a ladder.
FIG. 9 shows a configuration in which the operation panel 50 has a liquid crystal display form, and the name of the sales office in charge of the service company and the address / telephone number can be called together with the above notification. You can call the sales offices in each district in Japan in advance and know the necessary telephone numbers etc. from the sales offices. When any abnormality is detected, the above-mentioned office name can be selected together with the abnormality display, which is convenient because it is displayed together with the abnormal phenomenon when emergency contact is required.

[Brief description of drawings]

FIG. 1 is a front view of an entire dryer.

FIG. 2 is a sectional view of a dryer main body.

FIG. 3 is an enlarged view of a burner installation configuration.

FIG. 4 is a control block diagram.

FIG. 5 is a front view of the operation panel surface.

FIG. 6 is a time chart.

FIG. 7 is a time chart.

FIG. 8 is a perspective view of a dryer.

FIG. 9 is an operation panel display unit at the time of abnormality.

[Explanation of symbols]

1 ... Machine frame, 2 ... Storage tank, 3 ... Drying room, 4 ... Grain collecting room,
5 ... Burner, 6 ... Hot air chamber, 7 ... Suction fan, 8 ... Exhaust chamber, 9, 9 ... Grain flow passage, 10, 10 ... Delivery valve,
11 ... Sublimation machine, 13 ... Bucket, 14 ... Bucket belt, 15 ... Lower transfer spiral, 16 ... Throwing opening, 17 ...
Upper transfer spiral, 18 ... Transfer gutter, 19 ... Rotating diffuser, 20
... Elevator motor, 24 ... Side wall, 25 ... Supply port, 26 ... Moisture meter, 27 ... Outlet, 28 ... Transparent lid, 29 ... Blower,
30 ... Combustion cylinder, 31 ... Burner motor, 32 ... Vaporization cylinder, 3
3 ... Air inlet, 34 ... Fan, 35 ... Igniter, 4
2 ... Guide wind tunnel, 43 ... Leg part, 44 ... Connection part, 45 ... Burner trunk, 46 ... Electromagnetic pump, 47 ... Hot air temperature sensor, 48
... controller, 49 ... control unit, 50 ... operation panel, 51 ...
Tension switch, 52 ... Drying switch, 53 ... Ejection switch, 54 ... Stop switch, 55 ... Grain type setting switch, 56 ... Finish moisture setting switch, 57 ... Tension amount setting switch, 58, 59 ... Increase / decrease switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Ueji, No. 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Technical Department, Iseki Agricultural Machinery Co., Ltd. (72) Inventor Masafumi Yumate, 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. (72) Inventor Masayuki Chikamoto, 1 Yakura, Tobe-machi, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A burner 5 and an exhaust fan 7 are provided for the grain flowing down the downflow passages 9, 9 by the rotation of the feeding valves 10, 10.
In the dryer that finishes to a predetermined moisture value while repeating drying while supplying hot air generated by the action of, feeding the dried grain, and then lowering it through the lower transfer spiral, the elevator, and the upper transfer spiral to the upper grain tank, The feeding valve 1
A control unit 49 that outputs an intermittent operation signal to the valve motor 24 that interlocks 0 and 10 and outputs a continuous operation signal to the circulation motor 20 that drives the elevator and the upper and lower transfer spirals is provided. A grain circulation control device in a grain dryer configured to output a stop signal to the circulation motor 20 from the time when the valve motor 23 is being driven to a predetermined time after the stop output so as to stop while the grain is being picked up. .