JPH02293581A - Grain discharge device of grain drier - Google Patents

Abstract

PURPOSE:To shorten the time necessary to finish discharge in the condition that grains are not pushed back to the inside of a grain drier from a discharge device and the grains are smoothly discharged by stopping and controlling an exhauster which sucks the air and exhaust it when the operation of discharging the drying-finished grains reaches near its completion. CONSTITUTION:When the operation discharging drying-finished grains dried by a grain drier 4 outside the drier is carried out and a starting switch is operated, the drying-finished grains in the drier 4 are sent out from a storage room 16 to a drying room 11 where the grains fall down into the lower part by the rotation of sending-out valves 12 and flow down and are supplied into a grain-collecting conduit 10. When the discharge of the drying-finished grains progresses and these are no grains at the upper part of the room 10 to form cavity condition, the amount of exhausted air by an exhauster 2 which sucks and exhausts the air coming from a hot air room 13 through the room 11 and an exhaust room 14 is increased and the current value of a motor of the exhauster, which rotates and drives the exhauster 2, rises up. When the current value rises up over a specified value, the motor of the exhauster is automatically stopped and controlled and the exhauster 2 is also stopped and controlled and the discharge operation of the drying-finished grains is carried out in the condition that the air is not sucked and exhausted.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain discharge device for a grain dryer.

Conventional technology Conventionally, during the discharge operation of discharging dried grains from the discharge device to the outside of the machine, the exhaust fan that sucks the wandering air out of the machine is operated by the exhaust fan motor, and from the start of this wandering work, It was a grain discharge device that was rotationally controlled throughout the entire period until the end of the process. Problem to be Solved by the Invention During a discharge operation in which dried grains are discharged from inside the grain dryer to the outside of the machine via a discharge device, near the end of this draining operation, the grains discharged from the discharge device At the same time as the quantity decreases, since the exhaust fan is rotated, outside air is sucked in from this exhaust device, so that the dried grains being discharged pass through this exhaust device and are dried. In order to solve the problems in which the dried grains could not be completely discharged because they were pushed back into the machine, and it sometimes took a long time to complete the discharge after reaching the end of the discharge operation. Means This invention provides an exhaust fan (2) that rotates and drives an exhaust fan (2) that sucks and exhausts the exhaust air to the outside of the machine during the wandering work in which dried grains are discharged from the discharge device (1) to the outside of the machine. A grain discharge device for a grain dryer is configured to automatically stop and control the exhaust fan (2) based on the current value of the motor (3). During the discharge operation from inside the dryer to the outside of the dryer via the discharge device 11), when this discharge operation reaches the end, the amount of wandering air sucked and exhausted by the exhaust fan (2) increases, and as a result, this The current value of the exhaust fan motor (3) that rotationally drives the exhaust fan (2) increases, and when this increased current value reaches a predetermined value or more, the exhaust fan motor (3)
is automatically stopped, and this exhaust fan (2) is controlled to stop, thereby stopping the outside air sucked in from the exhaust device (1). Therefore, the dried grains are removed from the exhaust device (11) It is smoothly ejected without being pushed back into the aircraft.

Effects of the Invention According to the present invention, when near the end of the discharge operation for discharging dried grains to the outside of the machine, an exhaust machine is provided which sucks and blows outside air.
By controlling the rotation of {2} to stop, the discharge device {1
}, outside air is no longer sucked in from the drying device (1), and the dried grains are no longer pushed back into the grain dryer from this discharge device (1), which facilitates discharge and also allows the dried grains to be discharged near the end of discharge. It has become possible to complete the process in a shorter time. Embodiment In the illustrated example, (4) is a grain dryer, and the machine wall (5) of this dryer (4) has a rectangular shape that is long in the front and rear direction, and consists of front and rear wall plates and left and right wall plates. This front wall board is provided with a burner case <<8>> containing an operating device (6) for starting and stopping the dryer (4) and a burner (7).
The rear wall plate is provided with an exhaust fan (2), an exhaust fan motor (3) for rotationally driving the exhaust fan (2), and a variable speed motor (9).

In the center of the lower part of the machine wall (5), there is a grain collection gutter (I1) which is equipped with a transfer spiral in the front and back direction, and on the upper side there is a drying chamber (1υ) formed between the ventilation nets. are arranged in parallel and communicated with each other, and in the lower part of this drying chamber (11) there is installed a delivery valve 0も that allows grains to be delivered and flowed down by rotation.
A hot air chamber (+31) is formed between the inner sides of each of these drying chambers (+11), and this hot air chamber (1:il and the burner (7) are connected to each other. Wind room 0
41, and each exhaust chamber 04 and the exhaust fan (2) are configured to communicate with each other, and the variable speed motor (9) rotationally drives each of the delivery valves 0δ via a deceleration mechanism (+9). A storage chamber 11G) is formed on the upper side of each drying chamber (11) and communicated with each other, and a transfer gutter equipped with a ceiling plate (self) and a transfer spiral is provided on the upper side of this storage chamber (10). This transfer gutter the
A supply port for supplying the transferred grains into the storage chamber (1a) is provided in the center, and a diffusion plate (24) is provided below the supply port to uniformly diffuse and return the grains into the storage chamber (IQ). A discharge device (1) is provided at the bottom of the starting end side of this transfer gutter 01, and this discharge device (1) includes a discharge funnel Qe, an on-off valve (5) that can be opened and closed internally in this discharge funnel 12e, and The structure consists of a discharge pipe 121, and when the on-off valve (5) is operated to open the grain, the grains are discharged from the machine through this discharge funnel Qe and this discharge pipe (
(to).

The grain hoisting machine (I'S) is installed in front of the front wall plate, and inside the packet conveyor belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter (1111) Dispensing tube l2
1) for communication. A supply gutter (2δ) is provided between the lower end and the terminal end of the grain collecting gutter (1[I) for communication, and a motor (to) is provided at the upper part of this grain hoist (Fj).
With this motor (self), the packet conveyor f2G belt,
The transfer gutter (the transfer spiral in +111, the spreader plate 1241
and the grain collection gutter (111) is configured to rotate the transfer spiral via the packet conveyor +21 belt,
Further, a moisture sensor 4 is installed approximately at the center in the vertical direction to receive the grains that fall while being conveyed to the upper part by the packet conveyor 4, crush the grains under pressure, and at the same time detect the moisture content of the crushed grains. Each part of this moisture sensor 4 is powered by an internal motor (
It is configured to be rotationally driven by 291.

The operating device (6) is box-shaped, and the surface plate of the box has a start switch (1[l, A stop switch RO υ, each temperature setting switch that sets the temperature of the hot air generated from the burner (7) according to the operating position,
Moisture setting target 03 for setting the finishing target moisture according to the operating position, a display window 09 for displaying the moisture of the grain detected by the moisture sensor (2S1), the hot air temperature detected by the hot air temperature sensor (b), the remaining drying time, etc. It has a configuration with a timer〇〇 and a monitor display, etc., and inside it is equipped with an operation control device (main), a combustion control device (down), a current detection device (down), etc., and each setting (support), (B), 03 is a rotary switch type and has a configuration in which a predetermined value is set depending on the operating position. A- converts the value from A to D.
D converter 6 (S), input circuit capacity υ into which the conversion value converted by this A-D converter (G) is input, each switch 0■,
C3 [I, Ol. 0υ and the input circuit to which the moisture setting operation 03 is input, each of these input circuits), l4
The CPU H3. performs arithmetic and logical operations and comparison operations on various input values input from the The configuration includes two output circuits θ which receive and output various commands from the CPU←1.

The combustion control device (to) includes the hot air temperature sensor (to)
An A-D converter for A-D converting the detected value detected by the A-D converter, an input circuit into which the converted value converted by this A-D converter is input, and each of the temperature settings (b) and (b). The CPUG 4 performs arithmetic and logical operations, comparison operations, etc. on input circuits into which operations are input, and various input values input from these input circuits.
3. This CPU! This configuration includes an output circuit that receives and outputs various commands issued from 43.

The operation control and drying control by the operation control device mean that when the start switch CIO (which starts the discharge operation) is operated to start the discharge operation, the current value of the exhaust fan motor (3) changes to ) detected by the CPUH
The detected current value is compared with the current value of the exhaust fan motor (3) set and stored in this CPU (438, for example, 3.8A, and the detected and input current value of the exhaust fan motor (3) is If the current value of the motor (3) is greater than or equal to the current value of the setting memory of 3.8A.
) is controlled to stop, and the exhaust fan (2) rotationally driven by this exhaust fan motor (3) is controlled to stop, and the increase in the current value of the exhaust fan motor (3) is caused by the 1
It is configured to rise when the number of grains in the drying chamber (+υ) decreases and a cavity is generated in the upper part of the drying chamber (+υ).Also, when the drying operation is started by operating the start switch, The moisture sensor (251 is the moisture setting sensor c3)
When the dryer (4) is detected to have the same grain moisture content as the finishing target moisture content set by operating the dryer (4), the operation control device automatically controls the dryer (4) to automatically stop the dryer (4).

In the combustion control by the combustion control device (to), the hot air temperature detected by the hot air temperature sensor (to) is compared with the hot air temperature set by operating each of the temperature setting settings, and there is a difference. The fuel pump is controlled by this combustion control device (to) so that the temperature is the same as the set hot air temperature, and the amount of fuel supplied to the burner (7) is controlled.

In addition, during the discharge work, the pressure in the hot air chamber (11J) and the pressure in the storage chamber flGl are measured by each pressure sensor (t).
, the detected pressure difference is calculated by the operation control device, and this calculated pressure difference is compared with the pressure difference set and stored in the CPUt43, and when a pressure difference equal to or less than the set memory pressure difference is detected, This operation control device punishes the exhaust fan motor (3
) may be controlled to stop, and the exhaust fan <<2>> rotatably driven by the exhaust fan motor (3) may be stopped. The timer 〇Q is set a predetermined time before the discharge end time, and when the time set by the timer 〇G has elapsed, the exhaust fan motor (3) is controlled to stop, and the exhaust fan motor (3) is rotated. The exhaust fan (2) may be stopped and controlled. Also, the discharge tube a! The grain flow rate sensor (d) is configured to detect the discharged grain flow rate approaching the discharge from the CPUIA 3, and when this detected grain flow rate is lower than the grain flow rate set and stored in the CPUIA 3, the operation control device The exhaust fan motor (3) may be controlled to stop, and the exhaust fan (2) rotationally driven by the exhaust fan motor (3) may be stopped.

The operation of the above-mentioned embodiment will be explained below. 6 When performing the discharge operation of discharging dried grains from the grain dryer <<4>> to the outside of the machine, the operation device (6) is activated to start the discharge operation. By operating the switch 011, parts of the dryer (4) other than the burner (7) are started, and the dried grains in the dryer (4) are transferred from the storage chamber (IQ to the drying chamber [
+11 is fed out to the lower part by the rotation of the feed valve and flows down to be supplied to the collection gutter (Omonai), and from this collection gutter (1) to the supply gutter +25 to the lower part of the grain raising machine (I Binnai). It is transported to the upper part by the packet conveyor 4, and is supplied into the transfer gutter (I8) via the discharging tube (1), and then the opening/closing valve (5) in the discharge funnel (to) of the discharge device {1}. ) is opened, the dried grains are discharged from the discharge funnel I2e to the outside of the machine via the discharge tube.

During this discharge operation, the discharge of dried grains progresses, and for example, when there are no grains in the upper part of the drying chamber (!l) and the cavity becomes empty, outside air is drawn from the hot air chamber +131 to this drying chamber (!l).
), the amount of exhaust air sucked and exhausted by the exhaust fan (2) through the exhaust chamber Q41 increases, and as a result, the current value of the exhaust fan motor (3) that rotationally drives this exhaust fan (2) increases, When this current value rises above a predetermined value, the operating device (6) automatically stops the exhaust fan motor (3), stops the exhaust fan (2), and sucks and exhausts outside air. The operation of discharging dried grains is carried out in a state where there is no drying process.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is an overall side view of a grain dryer that can be partially cut away, and Fig. 4 is a grain dryer. A-A in Figure 3
A sectional view, FIG. 5 is a rear view of a portion of the grain dryer, FIG. 6 is a partially cutaway front view of a portion of the grain dryer, FIGS. 7 and 8.
The figures show other embodiments; Fig. 7 is a flowchart, and Fig. 8 is an overall side view of the grain dryer that can be partially cut away. In the figure, code (1) is the exhaust device, (2) is the exhaust fan, and <<3
>> indicates the exhaust fan motor.

Claims (1)

[Claims] During discharge work to discharge dried grains from the discharge device (1) to the outside of the machine, an exhaust fan (2) is used to suck and exhaust the exhaust air to the outside of the machine.
A grain discharge device for a grain dryer, characterized in that an exhaust fan (2) is automatically stopped and controlled based on the current value of an exhaust fan motor (3) that rotationally drives the exhaust fan (2).