JPS61240151A - Apparatus for measuring moisture of grain - Google Patents

Abstract

PURPOSE:To prevent the under-drying or over-drying of grain, by performing control so that the first max. voltage value within a time required until the moisture value of grain reaches a set reference value or less from the set reference value or more is set as a detected grain moisture value. CONSTITUTION:A pair of supply rolls 1, 1 take in and transfer fine grains one at a time and a pair of detection rolls 2, 2 receiving taken-in grain to grind the same therebetween under pressure and detecting the moisture of grain on the basis of the voltage value at the time of grinding are provided under the rolls 1, 1. Then, it is monitored and controlled whether the voltage value of grain during grinding between the rolls under pressure reaches the set reference value or more or less stored in a control apparatus 35 and the first max. voltage value within an one grain measuring time, during when the moisture value of grain reaches the set reference value or more from the set reference value or less and is returned to the set reference value or less, is detected as the moisture value of grain. When this detection process is repeated and grain reaches prescribed moisture, automatic control is performed by an operation apparatus 8 to automatically stop a dryer 3.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain moisture measuring device.

Conventional technology Conventionally, when measuring the moisture content of grains during drying with a moisture measuring device, an appropriate number of grains are crushed under pressure, and the maximum value of the voltage during this crushing is determined as the grain moisture value. Problem that the invention aims to solve: While the grains housed in the dryer are fed out from the drying chamber to the lower part and circulated downward, the hot air generated from the burner is ventilated into the drying chamber and is caused to flow down inside the drying chamber. While the grains inside are being dried by exposing them to this hot air, a suitable amount of the drying grains is transferred and fed by a supply roll, and the supplied grains are simultaneously crushed and crushed by a detection roll. In a moisture measuring device that performs moisture detection, if the amount of grains fed to the detection roll changes, 1. For example, if the amount of grains supplied is large and the amount of grains to be crushed under pressure is large, the moisture will be detected to be high, or On the other hand, if the supply amount is low and the amount of grain to be crushed under pressure is small, the moisture content may be detected low, which means that accurate grain moisture cannot be detected, and when drying is completed, the grains may be undried. Otherwise, it may become over-dried, resulting in increased occurrence of shell side and crushed grains.

Means for Solving the Problems This invention provides a pair of supply rolls (1), (1) for feeding and transferring grains one by one, and the supply rolls (1),
(1) A pair of detection rolls (2), (2) are installed at the bottom to receive the grains that have been brought in, crush them under pressure, and detect the moisture content of the grains based on the voltage value during this crushing. The time from when the grain moisture value detected by the detection rolls (2) and (2) goes from above the set standard value to below the set standard value is detected and controlled as the time when one grain is measured, and within this measurement time. The grain moisture measuring device is configured to include a control device that controls the first highest voltage value to be the detected grain moisture value.

Functions and Effects of the Invention For example, when a moisture measuring device is used in a dryer for drying grains, the grains housed in the dryer are circulated through a pair of rotating devices during drying. A part of the grains flowing down and circulating in the dryer flows into the spiral grooves of the supply rolls (1), (1), and the grains that have flowed in are fed one by one and transferred, Detection roll (2), (
2) The grains are supplied to the top and are crushed under pressure on the outer circumferential surface of the detection rolls (2), (2), and the voltage value detected by the detection rolls (2), (2) during this crushing causes the grain to be crushed. When moisture is detected, the control device controls the time required for the detected grain moisture value to go from above the set standard value to below the set standard value to be the time when one grain is measured. The grains are dried under detection control by the control device so that the first highest voltage value within the time period becomes the detected grain moisture value.

Conventionally, when measuring grain moisture during drying with a moisture measuring device, an appropriate number of grains were crushed under pressure and the highest value of voltage during this crushing was taken as the detected grain moisture value. According to the present invention, grains are fed in one by one by the supply rolls (1), (1), and these grains are transferred to the detection rolls (2),
Since the moisture is detected through crushing in step (2), it is possible to accurately detect grain moisture, and at the same time, the time it takes for this detected grain moisture value to go from above the set standard value to below the set standard value. is the time when this one grain was measured, and the first highest voltage value within this measurement time is the detected grain moisture value, so for example -
When the next grain is supplied during grain measurement, the voltage of the next crushed grain is added and the voltage becomes higher before the voltage during the first grain measurement drops, but the voltage becomes higher than the first maximum voltage value. Since the detected grain moisture value is the detected grain moisture value, even if two grains are measured consecutively, the highest voltage value within the measurement time is not the detected grain moisture value, so when the grain is finished drying, the grain is not yet dried. The grains will not become grainy or crumbly due to excessive drying.

Embodiment In the illustrated example, a storage chamber (5) is provided in the upper part of the model (4) of the dryer (3), a drying chamber (6) is provided in the lower part, and the front wall plate of the model (4) The section is equipped with a burner (7), an operating device (8) and a moisture measuring device (9), and this model (4)
A grain raising machine (!0) is installed in the front part, and a blower is installed in the rear wall plate part of the model (4).

The moisture measuring device (9) has front and rear plates (11), (11), upper and lower plates (12), (12), and left and right side plates (13), (!3).
) into a box shape, and the supply roll (1) is formed from this box body.
, (1) is a part of the structure that stands out.

The protruding supply rolls (1) and (1) are installed in a protruding state inside the front wall plate, and the detection roll (2) is installed inside the box.
), (2), etc., the grains flowing down in the model (4) are fed and transferred by the supply rolls (1), (1), and the detection rolls (2), (2) ).

Support metals (14) and (15) are provided inside the box, and supply roll shafts (1B) and (17) are provided on the upper part of the box.
) is pivotally supported by the support metals (14) and (15), and the supply roll (1) having a helical groove formed on the outer peripheral surface is fixed to one end of the supply roll shaft (IB), and the other A gear (18) is fixed to one end, the supply roll (1) is fixed to one end of the supply roll shaft (17), and a gear (18) is fixed to the other end.
19), and a portion of the supply rolls (1), (1) protrudes into the model (4) from the opening (20) of the front wall plate of the model (4), The supply roll (1
), (1) are connected to both supply rolls (1).
) and (1) so that they match each other at the inner circumferential contact portions, and the grains flowing down in the model (4) are transferred to this supply roll (1).
), (1), the structure shaft (21), (2
2) is pivotally supported by the support metals (14) and (15), and the detection roll shaft (2υ is fixed to one end of the detection roll (2), and the other end is equipped with a two-stage gear (23)). The detection roll (2) is fixed to one end of the detection roll shaft (22), and the gear (24) is fixed to the other end. The supplied grains are crushed under pressure by the outer circumferential surfaces of the detection rolls (2), (2), and the voltage value at the time of this crushing is detected to detect grain moisture.

A cleaning roll shaft (
The cleaning roll shaft (25) is pivotally supported by the support metals (14) and (15), and the cleaning roll shaft (25) has a cleaning roll (25) at one end.
A gear (27) is fixed to the other end, and a brush is provided on the outer peripheral surface of the cleaning roll (2B), and this brush comes into contact with the outer peripheral surface of the detection roll (2), (2). This is a configuration in which the detected grains adhering to the detection rolls (2), (2) are removed.

(28) is a motor, and this motor (28) is fixed to the support metal (15), and a gear (29) is fixed to the shaft end of this motor (28). gear (23) and the gears (18), (19),
(20 and (27) are configured to mesh with each other, and an inclined plate (30) is provided at the bottom of the cleaning roll (2B), and the moisture is removed by crushing under pressure between the detection rolls (2) and (2). The detected crushed grains are returned to the model (4) through the return port (42) of the front wall plate through the inclined plate (30) and circulated at the same time as the drying grains. .

The motor (
28) rotates, and the gear (29) of this motor (28) rotates.
) and the two-stage gear (23) meshing with the gear (
18), (19), (24), and (27) are rotationally driven, and the supply rolls (1), (1), the detection rolls (2), (2), the cleaning roll (28), etc. are rotated. This is a driving configuration.

The operating device (8) is box-shaped and has a start switch (31), a stop switch (32), a target moisture setting knob (33), a hot air temperature setting knob (30, etc.) on one surface, and inside. has a control device (35), and the control device (35) is an input circuit into which the operations of the switches (31), (32) and the setting knobs (33), (34) are input. (3B), an A-to-D converter (37) in which the detected voltage value detected by the moisture measuring device (9) is A-to-D converted; the converted value converted by this A-D converter (37) is input; input circuit (3B), these input circuits (3B), (36
) and a CPU (3B) that performs arithmetic and logical operations and comparison operations on various input values input from the CPU (38), and an output circuit (38) that outputs various commands issued by the CPU (38). At (35), the motor (28) of the moisture measuring device N (9), the various motors (40) of the dryer (3), the fuel pump (41) that supplies fuel into the burner (7), etc. This is a configuration for starting, stopping, controlling, etc.

The CPU (3B) compares the set value set in the target moisture setting unit (33) with the detected grain moisture value detected by the moisture measuring device H (9), and determines the grain moisture value that is the same as the set value. When this moisture measuring device M (9) detects, the dryer (3) is automatically stopped, and the voltage value of the detected grain moisture detected by this moisture measuring device (9) is controlled by this CPU ( 38) Monitor and control whether the voltage value stored in the memory exceeds a predetermined standard or falls below a predetermined standard, and the voltage value of the detected grain moisture changes from below the set standard value to above the set standard value.

Also, it is detected that one grain was measured within this time period when the value returned to below the set reference value, and the first highest voltage value within this one grain measurement time is detected as the detected grain moisture value at this measurement. When starting the drying work, this CP is set so that the hot air temperature is set by the hot air temperature setting sprayer (34).
U (3B) controls the fuel pump (41) and also controls the fuel supplied into the burner (7).

By operating the operating device (8), the hot air generated from the burner (7) installed on the front wall plate is sucked and exhausted by the exhaust fan installed on the rear wall plate, thereby opening the drying chamber (6). The grains, which are ventilated and stored in the model (4) of the dryer (3), are exposed to this hot air and dried while flowing down the drying chamber (6), and then stored from the grain raising machine (10). The grains flowing through the machine (4) are dried by repeating the circulation back into the chamber (5), but the grains flowing down the machine (4) are
The motor (28) of the moisture measuring device (9) rotates, and a two-stage gear (29) meshes with the gear (29) of this motor (28).
23) and gears (18), (18), (24), (2
7) is rotationally driven, the supply rolls (1), (1) are rotationally driven, and the grains flowing down in this model (4) are
4), the grains flow into the spiral grooves of the inserted supply rolls (1), (1) 8, and the grains that flow into the spiral grooves and are accommodated are transferred. The powder is then supplied onto rotationally driven detection rolls (2), (2), and is crushed under pressure between the outer peripheral surfaces of the detection rolls (2), (2).
It monitors and controls whether the voltage value of the grains during crushing under pressure is equal to or higher than the set reference value stored in the control device (35) or lower than the set reference value, and the voltage value is changed from below the set reference value to above the set reference value. It is detected that one grain was measured within this time, and the value returns to below the set reference value.The first highest voltage value within this one grain measurement time is detected as the moisture value of the detected grain, and this detection When the process is repeated and the grain reaches the specified moisture content, the operating device (8) automatically controls the dryer (3) to automatically stop.

The crushed grains that have been detected are guided downward by the inclined plate (30) and discharged into the model (4) from the reduction port (42) of the front wall plate, where they are circulated at the same time as the drying grains. will be returned. The crushed grains adhering to the outer circumferential surfaces of the detection rolls (2), (2) are removed and cleaned by the brush of the cleaning roll (2B) which is rotationally driven.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a side sectional view, Fig. 3 is a rear view, and Fig. 4 is a partially cutaway front view of the dryer. FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, code (1) indicates a supply roll, and code (2) indicates a detection roll.

Claims (1)

[Claims] A pair of supply rolls (1) that feed and transfer grains one by one
, (1), and at the bottom of the supply rolls (1) and (1), there is a pair of supply rolls (1) and (1) that receive the loaded grains and crush them under pressure, and detect the moisture content of the grains based on the voltage value during this crushing. Detection rolls (2), (2) are provided, and the detection rolls (2), (2) are provided.
) detects and controls the time it takes for the grain moisture value to fall from above the set standard value to below the set standard value as the time when one grain is measured, and at the same time, the first highest voltage value within this measurement time. A grain moisture measuring device comprising a control device for controlling the detected grain moisture value.