JPS61259153A - System for measuring moisture component of grain - Google Patents

Abstract

PURPOSE:To make it possible to perform the drying control of grain by preliminarily estimating the moisture transfer of grain after drying, by altering and correcting a set moisture value by an immature grain mixing ratio and the standing time of dried grain. CONSTITUTION:Grains during the flowing in the machine wall of a drying machine are delivered to the spiral groove of a supply roll 1 one at a time and pressed and ground between the outer peripheral surface parts of detection rolls 2 while the voltage value corresponding to the moisture value of grain is detected. This detected voltage value is compared with a set voltage value and, when said voltage is the set voltage value or more, the grain is discriminat ed as immature one and an immature grain mixing ratio is detected on the basis of the number of detection times of immature grain. If the detected im mature grain mixing ratio is higher than a set value and the set time set by a standing time setting knob is longer than a stored set time, the drying opera tion of the drying machine is controlled unit a grain moisture value becomes lower than the set moisture value set by an objective moisture setting knob to dry grain.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for measuring the moisture content of grains, and can be used in grain dryers and the like.

Conventional technology Conventionally, the target moisture setting method has been used to detect moisture, even when the grain is drying with many immature grains mixed in, or when dried grain is left for a long time. When the moisture measuring device detected the same moisture value as the set moisture value set by operating the machine, grain drying work was stopped.

Problem to be Solved by the Invention A part of the grains being dried are transferred one by one by a pair of supply rolls, and then supplied onto a pair of detection rolls, and the supplied grains are transferred to the outer peripheral surface of the detection rolls. For example, if a large amount of immature grains is mixed in with the grains being detected, immature grains will be classified as fine grains. When drying is finished, the moisture content of immature grains is higher than that of fine grains, and for this reason, dried grains are left for a long time. The moisture content of immature grains with high moisture content may transfer to fine grains with low moisture content, increasing the moisture content of fine grains. When the work was carried out and the grains were to be delivered, the moisture content of the fine grains was higher than the specified value and the grains were in an undried state, so the grains could not be delivered.

Means for Solving the Problems This invention provides a pair of supply rolls (1), (1) for feeding and feeding grains one by one, crushes the supplied grains under pressure, and also detects moisture content. In addition, a pair of detection rolls (2) and (2) are provided to detect whether fine grains or immature grains are detected and to detect the mixing ratio of immature grains, and a target for setting a finishing target moisture value. A moisture setting pick (3) and a standing time setting pick (4) for setting the time for leaving dried grains until the hulling operation after completion of drying are provided, and the detection rolls (2) and (2) detect this. control to change and correct the finishing target moisture value set in the target moisture setting process (3) according to the immature grain mixing ratio and the standing time of the dried grains set in the standing time setting process (4); The structure is based on a grain moisture measurement method that includes a device.

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 the dryer while being dried by a pair of rotatably driven devices. The grains are fed and transferred one by one by the supply rolls (1), (1), and then supplied onto the detection rolls (2), (2). ), the moisture content of the crushed grains is detected, and the target moisture setting is set.
When this moisture measuring device detects a grain moisture value that is the same as the set moisture value set in step 3), the operating device automatically controls the dryer to automatically stop the dryer, but the detection rolls (2) and (2) Based on the detected grain moisture value, the control device detects whether fine grains or immature grains are detected, and this control device detects the ratio of immature grains in the grains being dried, and detects the immature grains. For example, the detected immature grain mixing ratio can be controlled according to the mixing ratio and the setting time set in the standing time setting knob (4) that sets the leaving time for dried grains after drying is completed and before the hulling operation. If the immature particle mixing ratio is higher than the setting stored in the device, and if the setting time is too long,
The grains are dried by controlling the drying operation of the dryer until the moisture value becomes lower than the set moisture value set in the target moisture setting process (3).

According to the present invention, the mixing ratio of immature grains mixed into the grains during drying is detected, and the target moisture content is set in the target moisture setting selection (3) based on this immature grain mixing ratio and the standing time of the dried grains. By controlling and changing the set moisture value, the moisture transfer of the grain after drying can be predicted in advance, even when the proportion of immature grains is high and the time of leaving dried grains for a long time. By controlling the drying of the grains, even if moisture transfer occurs while the grains are left to stand after drying, the fine grains will not become undried.

Example In the example in Figure 1, (5) is a dryer, and this drying m
A storage chamber (7) is provided in the upper part of the machine wall (6) of (5), and a drying chamber (8) is provided in the lower part, and in the lower part of this drying chamber (8) there is a feeding valve (9) that feeds out the grains and flows down. , and the machine wall (6
) A burner (10), an operating device (11), and a moisture measuring device (12) are installed on the front wall, and an exhaust fan (1) is installed on the rear wall.
3). At the front of the machine wall (6) there is a grain hoist 42 (1
4).

The hot air generated from the burner (10) is discharged from the rear part of the exhaust air a (
13), the drying chamber (8) is ventilated, and the grains flowing down the drying chamber (8) are exposed to this hot air and dried, and then the grains are moved to the upper part by the grain raising machine (14). The grains are dried by repeating the circulation in which they are transported to the storage chamber (7) and supplied into the storage chamber (7).

The moisture measuring device (12) has front and rear plates (15), (!5),
Upper and lower boards (1B), (18) and left and right horizontal boards (17), (1
7) into a box shape, and the supply roll (1
), (1) are configured to protrude, and the protruding supply rolls (1), (1) are attached to the front wall plate so as to protrude, and the detection roll (1) is installed in the box body. 2), (2)
The grains flowing down inside the machine wall (6) are transferred by the supply rolls (1), (1), and are fed onto the detection rolls (2), (2). It is configured to do this.

Support metals (18) and (19) are provided inside the box body, and supply roll shafts (20) and (21) are pivotally supported by the support metals (18) and (18) in the upper part of the box body. The supply roll (1) having a helical groove formed on the outer peripheral surface is fixed to one end of the supply roll shaft (20), and a gear (20) is fixed to the other end.
22), the supply roll (1) is fixed to one end of the supply roll shaft (21), and a gear (23) is fixed to the other end.
The spiral grooves of the supply rolls (1), (1) are brought into alignment with each other at the inner circumferential contact portions of the re-supply rolls (1), (1), and the machine wall ( 6) The grains flowing down are transferred one by one into the matched spiral grooves of the supply rolls (1), (1), and the detection rolls (2), (2) below the ends are transferred. ).

A detection roll shaft (
24) and (25) are pivotally supported by the support metals (18) and (19), the detection roll (2) is fixed to one end of the supply roll shaft (24), and the two are fixed to the other end. Stage gear (2B)
The detection roll (2) is fixed to one end of the detection roll shaft (25), and the gear (27) is fixed to the other end. The supplied grains are crushed under pressure between the detection rolls (2) and (2) on the outer peripheral surface, the voltage value at the time of this crushing is detected, and this voltage value is replaced with grain moisture for detection. The structure is such that the grain moisture value is as follows.

A cleaning roll shaft (
28) is pivotally supported by the support metals (18) and (19), a cleaning roll (29) is fixed to one end of the cleaning roll shaft (2), and a gear (30) is attached to the other end. A brush is provided on the outer peripheral surface of the cleaning roll (28), and the tip of this brush is attached to the detection roll (2), (2).
The detection roll (2
), (2) The structure is such that the crushed grains having detected moisture adhering to the outer circumferential surface are removed.

(31) is a motor, this motor (31) is fixed to the support metal (19), a gear (32) is fixed to the shaft end of this motor (31), and this gear (32) and the gear (22), (23), (27), (3o) and the two-stage gear (2B) are configured to mesh with each other, and an inclined plate (33) is provided at the bottom of the cleaning roll (29), and the detection The crushed grains, which are crushed under pressure between the rolls (2) and (2) and whose moisture has been detected, are passed through this inclined plate (33) and into the machine wall (6) from the reduction port (34) of the front wall plate. The structure is such that it is reduced to water and circulated at the same time as the drying grains.

The motor (31) rotates upon transmission of a measurement signal from the operating device (11), and the gear (22) meshes with the gear (32) of the motor (31).

(23), (27), (30) and the two-stage gear (2
6) is rotationally driven, and the supply rolls (1), (1), the detection rolls (2), (2), and the cleaning roll (28)
) etc. are rotationally driven.

The operating device (11) is box-shaped, and the surface includes a start switch (35), a stop switch (311), a target moisture setting knob (3), a standing time setting knob (4), and a hot air temperature setting knob. (37), etc., and has a control device, (
38), and the control device (38) has the respective switches (35), (36) and the respective setting switches (3),
Input circuit (39) into which operations (4) and (37) are input
, the detection roll (2) of the moisture measuring device (12)
, (2) and the detected value detected by the hot air temperature detection sensor (45) are converted into digital signals. an input circuit (39) into which converted values are input, a CPU (41) which performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits (39) and (39); The configuration includes an output circuit (42) that outputs various commands issued by the control device (3).
8) the motor (31) of the moisture measuring device (12);
, each part of the dryer (5) is rotationally driven. It is configured to start, stop, control, etc. various motors (43) and a fuel pump (44) that supplies fuel into the burner (IO).

The CPU (41) compares the set voltage value set by the target moisture setting pick (3) with the detected voltage value detected by the detection rolls (2), (2), and selects grains that are the same as the set voltage value. When the detection rolls (2), (2) detect the voltage value of moisture, the drying m (5) is automatically stopped, and the detection voltage value detected by the detection rolls (2), (2) is configured to automatically stop the drying m (5). is replaced with a grain moisture value, and the replaced grain moisture value is displayed on the display window of the operating device (11). The detection voltage value detected by the detection rolls (2) and (2) and the CPU (
41) and the set voltage value stored in the CPU (41).
1), a detected voltage value that is equal to or higher than the set voltage value is detected as a voltage value at which immature grains are detected, and the CPU (41) detects the immature grain contamination ratio based on the number of detections. Compare the immature grain mixing ratio with the set immature grain mixing ratio stored in this CPU (41), and when the detected immature grain mixing ratio is higher than the set immature grain mixing ratio,
In addition, if the time set in the above-mentioned leaving time setting step (4) is longer than the set time stored in the CPU (41), the set moisture value set in the target moisture setting step (3) is longer. , this CPU (41) until the moisture value of the grain becomes low.
The dryer (5) is controlled in this manner.

When starting the drying work, the hot air temperature setting hole (37)
This CPU is heated to the hot air temperature you set by operating
(41) controls the fuel pump (44) to control the amount of fuel supplied into the burner (10), and the hot air temperature detection sensor detects the hot air temperature generated from the burner (10). (45) detects the hot air temperature, and the fuel pump (44)
).

By operating the start switch (35) of the operating device (11), hot air generated from the burner (10) provided on the front wall plate is sucked and exhausted by the exhaust fan (13) provided on the rear wall plate. By ventilating the drying room (8), the dryer (5)
The grains stored in the machine wall (6) are exposed to this hot air and dried while flowing down in the drying chamber (8), and then
4) The grains are returned to the storage chamber (7) and dried by repeating the circulation, but the grains flowing down the #1 wall (6) receive an electrical measurement signal from the operating device (11). In response to the transmission, the motor (31) of the moisture measuring device (12) rotates, and the gear (22) meshing with the gear (32) of this motor (31) rotates.
).

(23), (27), (30) and two-stage gear (2B)
is rotationally driven, the supply rolls (1), (1) are rotationally driven, and the grains flowing down inside the machine wall (6) are
The grains are fed one by one into the spiral grooves of the supply rolls (1), (1) inserted into the interior, and transported along the grooves to the detection rolls (2), (2) which are driven to rotate. The voltage value of the crushed grains is detected, the voltage value of the crushed grains is detected, and this voltage value is replaced with the grain moisture value to perform the operation. This replaced grain moisture value is displayed on the display window of the device (11), this detection process is repeated, and the target moisture setting value of the operating device (11) is
When the moisture measuring device (12) detects the same grain moisture value as the set moisture value set in step 3), the control device (38) of the operating device (11) automatically controls the dryer (5). Automatically stop.

When detecting this grain moisture, the detection rolls (2), (2)
The detected voltage value detected by the control device (38) is compared with the set voltage value stored in the control device (38), and if the detected voltage value is equal to or higher than the set voltage value, immature grains are detected. The control device (38) detects the immature grain mixing ratio, and compares the detected immature grain ratio with the set immature grain ratio stored in the controller (3 days), so that the detected immature grain ratio becomes the set immature grain ratio. If the set time set in the left time setting knob (4) of the operating device (11) is longer than the stored set time, the target moisture value will be higher than the set moisture value set in the target moisture setting knob (3). The drying operation of the dryer (5) is controlled to dry the grains until the grain moisture value becomes low.

The crushed grains that have been detected are discharged from the inclined plate (33) through the reduction port (34) into the 411 wall (6), and are circulated and reduced at the same time as the drying grains. The detection roll (
2), (2) The crushed grains adhering to the outer circumferential surface are removed and cleaned by the brush of the cleaning roll (28) that is rotationally driven.

The finishing target moisture value is changed and corrected in advance according to the mixing ratio of immature grains detected by the detection rolls (2) and (2) and the length of time the dried grains are allowed to stand, so that fine grains become undried. Never.

[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) is a supply roll, (2) is a detection roll,
(3) shows the target moisture setting setting, and (4) shows the standing time setting setting.

Claims (1)

[Claims] A pair of supply rolls (
1) and (1) are provided, the supplied grains are compressed and crushed, moisture is detected, and the ratio of immature grains is detected by detecting whether fine grains or immature grains are detected. Detection rolls (2) and (2) are provided, as well as a target moisture setting picker (3) that sets the finishing target moisture value and a leaving time that sets the leaving time of the dried grains until the hulling operation after completion of drying. A setting grip (4) is provided, and the detection roll (2), (2
) detected by the immature grain contamination ratio and the corresponding standing time setting (4)
A grain moisture measuring method comprising a control device that changes and corrects the finishing target moisture value set in the target moisture setting step (4) according to the drying grain standing time set in step (4).