JPH0623706B2 - Moisture measurement method in a dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for measuring water content in a drying device.

(Prior Art) Conventionally, it is known that a moisture meter is attached to a drying device and the moisture of the grain is measured by the moisture meter.

(Problems to be solved by the invention) However, regarding the one using the electrode roll for the moisture meter,
Until now, there was no clear measuring method and there was an error.

(Means for Solving the Problem) Therefore, according to the present invention, the grain size of a prescribed number of grains is fed between the electrode rolls by the grain feeding roll attached to the drying device one by one, and the moisture content is measured. The measurement is interrupted after supplying the number of grains, and the measurement is interrupted by supplying the number of grains again, and the water content value is obtained by averaging the results of the repeated measurement as described above, This is a method for measuring water content in a drying device in which the interruption time is short when the supply time of the predetermined number of grains is long and the interruption time is long when the supply time of the predetermined number of grains is short.

(Embodiment) An embodiment of the apparatus used in the method of the present invention will be described with reference to the drawings. 1 is a moisture meter main body case attached to a dryer or the like, and a horizontal axis 2 is provided in the moisture meter main body case 1. A grain-feeding roll 3 for feeding one grain is provided. The grain feeding roll 3 is formed to have a constant length, and the front half portion 4 has a structure in which a spiral feeding groove 6 is engraved on the surface of the cylindrical portion 5, and a flat cylindrical portion 5 is provided between the spiral feeding grooves 6 and 6. Has been formed.

The latter half portion 7 with respect to the first half portion 4 forms a grain feeding spiral blade 8, and a portion other than the grain feeding spiral blade 8 is formed into a small diameter cylinder 9. The grain feeding spiral blade 8 does not feed grains on the blade surface, but forms the spiral feeding groove 6 on the outer peripheral edge thereof and feeds grains in the spiral feeding groove 6.

A plate 10 is abutted on the side of the grain transfer roll 3 so as to be openable and closable.
The upper part of the plate 10 is axially attached to the horizontal shaft 11 and elastically feeds the grain feeding roll 3
Abut.

Reference numeral 12 is a spring provided at a desired position. The plate 10 is formed such that a portion contacting the front half 4 of the grain transfer roll 3 is elongated downward, but a portion contacting the rear half 7 of the grain transfer roll 3 is notched to form a notch 13, Therefore, the grain feeding spiral wing 8
The grains sent by the spiral feed groove 6 at the outer edge of the drop of the grains drop downward one by one when they reach the notch 13.

A pair of left and right electrode rollers 14 and 15 are provided below the grain transfer roll 3 and the plate 10. A grain guide guide 16 is provided so that the grain fallen between the grain feeding roll 3 and the plate 10 is guided by the electrode rollers 14 and 15.

Then, a window hole 17 is provided in the vicinity of the plate 10 of the moisture meter main body case 1, and a shell 18 is rotatably attached to the window hole 17 by a shaft 19. When the shell 18 stands upright, it closes the window 17 and prevents the grains from scattering from the moisture meter main body case 1 to the outside.

The shell 18 is U-shaped when viewed from above, and the side walls 20 and 21 are provided on both sides.
To provide. Ciel 18 has a sample cup that fits this
22 is detachably fitted.

The sample cup 22 is a spoon for scooping about 30 to 50 particles, and has a push plate 23 that engages with the upper edge of the shell 18. That is, open the shell 18 to the outside, fit the sample cup 22 into the shell 18, and insert the sample cup 22 and the shell.
When 18 is closed together, the sample falls and is guided by the grain guide guide 16 and the water content is measured by the electrode rollers 14, 15.

An engaging portion 24 is provided at the tip of the side wall 20 of the shell 18. Engagement part
When the shell 18 is opened, 24 has a role of rotating the plate 10 in the direction a, and an engaging plate 25 that abuts the engaging portion 24 is projected at a desired position of the plate 10.

FIG. 8 is a block diagram when the above device is automated. 27 is a resistance voltage converter, 28 is an analog-digital converter, 29 is a CPU, 30 is an output interface, 31 is a digital display unit, 32 is an input interface. Is.

FIG. 9 is a block diagram in which the moisture meter main body case 1 is attached, 33 is a dryer main body, 34 is an automatic controller for the dryer main body 33, and 35 is a moisture meter controller.

(Operation) Next, the operation will be described.

First, to describe the normal use, the plate 10 is in contact with the grain transfer roll 3 by the elasticity of the spring 12. Therefore, when a part of the grain 26 of the drying device 27 is guided and supplied between the plate 10 and the first half portion 4, the grain transfer roll 3 rotates in the direction (d), and thus the grain 26 Moves in the direction of B one by one,
It moves from the position of the spiral feeding groove 6 of the first half portion 4 to the position of the spiral feeding groove 6 of the grain feeding spiral blade 8 of the latter half portion 7. Board 10 in this position
Since the cutout 13 is formed in the cutout, it falls from the cutout 13 and is crushed by the electrode rollers 14 and 15 to measure the water content of one grain.

Then, when trying to measure the grain outside the machine, pull the sample cup 22 in the direction of C and the shell 18 will rotate, and the sample cup 22 will be exposed outside the moisture meter main body case 1. Can be removed from 18. In this state,
The engaging portion 24 of the side wall 20 of the shell 18 hits the engaging plate 25 of the plate 10 to rotate the engaging plate 25, so that the plate 10 moves in the direction a and the space between the plate 10 and the grain transfer roll 3 is increased. Make a gap in.

Therefore, the grain is not fed by the spiral feeding groove 6 and the water content in the machine is not measured.

Next, scoop about 30 to 50 grains 26 outside the machine in the sample cup 22, fit them into the shell 18, and push them so that the window holes 17 are covered to measure the sample.

At the same time, the contact between the engaging plate 25 and the engaging portion 24 is released, so that the plate
Although 10 contacts the grain feeding roll 3 as before and the grain 26 is moved in the direction B by the spiral feeding groove 6, the movement in the direction B requires a certain period of time, which does not hinder the measurement of the sample.

Then, the grain 26 is fed by the grain feeding roll 3 by feeding 32 grains one by one to measure the water content. That is, to explain with reference to the flowchart of FIG. 10, when the switch is turned on, the measurement time of 32 grains, for example t time, is started, and when one grain is detected, the moisture content is measured. This time is usually set to about 5 seconds, and 32 particles are measured in total, so it is set to 160 seconds by calculation of 5 × 32 = 160, but when the actual measurement time is less than 160 seconds There are two types: when there is a large amount, when it is small, the next measurement time is lengthened, when it is long, the next measurement time is shortened, and the total time is always approximately equal.

(Effect) Conventionally, it is known that a moisture meter is attached to a drying device and the moisture of the grain is measured by the moisture meter.

However, regarding the one using the electrode roll for the moisture meter,
Until now, there was no clear measuring method and there was an error.

However, the present invention, in measuring the water content by supplying a predetermined number of grains one by one between the electrode rolls by the grain feeding roll attached to the drying device, after supplying the predetermined number of grains. The measurement is interrupted, the measurement is interrupted by supplying a predetermined number of grains again, and the result of repeated measurement is averaged to obtain a moisture value, and the supply time of the predetermined number of grains is When it is long, the interruption time is short, and when the supply time of the predetermined number of grains is short, the interruption time is extended. However, if the measurement time becomes too long, it may be over-dried and it may make an irreversible failure.However, in the case of this plan, the unstable flow of each grain 26 is constantly monitored and the next measurement start time Because I decide The constant time can be shortened, thereby preventing the failure to overdrying which can not be irreversible.

[Brief description of drawings]

FIG. 1 is a perspective view of a measuring unit for external particles, FIG. 2 is a side view of the same,
3 is a front view of the whole, FIG. 4 is a cutaway perspective view of the same portion, FIG. 5 is a perspective view of a plate, FIG. 6 is an exploded view of essential parts, FIG. 7 is a perspective view of a sample cup and shell, 8 and 9 are block diagrams, and FIG. 10 is a flowchart. Explanation of reference numerals 1 ... Moisture meter main body case, 2 ... Horizontal axis, 3 ... Grain roll, 4 ... First half part, 5 ... Cylindrical part, 6 ... Spiral feeding groove, 7
...... Latter half, 8 ...... Grain feeding spiral blade, 9 ...... Small diameter cylinder, 10 ...
… Plate, 11 …… horizontal axis, 12 …… Spring, 13 …… Notch, 14,15
...... Electrode roller, 16 …… Grain guide, 17 …… Window hole, 18 …… Ciel, 19 …… Spindle, 20 …… Side wall, 21 …… Side wall, 22 …… Sample cup, 23 …… Pressing Plate, 24 ... Engagement part, 25 ... Engagement plate, 26 ... Grain, 27 ... Resistance voltage converter, 28 ... Analog-digital converter, 29 ... CPU, 30 ...
… Output interface, 31… Digital display, 32…
… Input interface, 33 …… Dryer body, 34 ……
Automatic controller, 35 ... Moisture meter controller.

Claims (1)

[Claims] 1. When the moisture is measured by supplying a predetermined number of grains one by one between electrode rolls by means of a grain-sending roll attached to a drying device, after supplying the predetermined number of grains. The measurement is interrupted, the measurement is interrupted by supplying a predetermined number of grains again, and the result of repeated measurement is averaged to obtain a moisture value, and the supply time of the predetermined number of grains is A method for measuring water content in a drying apparatus, wherein when the time is long, the interruption time is short, and when the time for supplying the predetermined number of grains is short, the interruption time is long.