JPS6218013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic moisture detection device that can accurately and automatically detect the moisture content of rice grains that are constantly being moved in a rice aisle only by the upward vibration operation of an opening/closing shutter.

When automatically measuring the moisture content of paddy during transportation, if the paddy to be measured is not maintained at a constant density at the time of detection, even if the moisture content of the detected paddy is constant, the paddy itself The moisture detection value changes automatically due to changes in the estimated density, making it impossible to obtain accurate moisture content.

Therefore, in order to make the estimated density of the paddy almost uniform, the paddy being moved is stored in a suitable container, and the paddy is subjected to vibration to make the density uniform, thereby obtaining a more accurate moisture detection value. Techniques have been developed to achieve this goal.

However, in cases where the moisture detection work is carried out by storing a predetermined amount of paddy in a separate container during transportation, the paddy for detection can be quickly and easily stored or discharged. Therefore, the detection work cannot be carried out quickly and easily, and the detection time is long, and an accurate moisture detection value cannot be obtained.

In view of the above, the present invention provides a movable hopper with a drop opening at the bottom located above a hollow moisture detection body disposed in a paddy passage, and a detection electrode provided inside the movable hopper. A moisture detection chamber with its lower end open is fixed, and a suction coil is installed directly below the drop port to close the drop port while pushing up a movable hopper to compress the paddy that has fallen into the moisture detection chamber. An opening/closing shutter equipped with a detection electrode is installed so that it can move up and down, and the paddy in the moisture detection chamber is vibrated by a vibration coil to equalize the paddy density. The purpose of this invention is to provide an automatic moisture detection device that classifies the accumulation density to a constant state through a rising and vibration operation, and easily accomplishes quick and accurate moisture detection. The configuration of the inventive device will be described with reference to a preferred embodiment shown in the accompanying drawings.

In the drawing, reference numeral 1 denotes a paddy passageway through which the paddy to be detected can freely flow, and in the paddy passageway 1, a hollow moisture detecting body 2 with both ends open is installed vertically along the paddy distribution direction. It is fixed with a suitable support fitting 3. A movable hopper 4 having a drop port 5 at the bottom thereof is housed in an upper position within the moisture detector 2 so as to be able to move up and down. The attached moisture detection chamber 6 with its lower end open is supported by a support rod 8 and fixed at a fixed position.
The positional relationship between the movable hopper 4 and the moisture detection chamber 6 is such that when the movable hopper 4 is in the lowered state as shown in FIG. The movable hopper 4 can be dropped more easily, and in the detection state shown in FIG.
and the moisture detection chamber 6 engage to prevent the paddy in the movable hopper 4 from entering the moisture detection chamber 6. It is formed so that it can flow through the flow path 9 formed between.

Immediately below the aforementioned drop port 5, a container 10 containing a vibrating coil 11 in the upper stage and an adsorption coil 12 in the lower stage is placed inside the moisture detector 2 via a support rod 13 so that a flow interval 20 of an appropriate width is maintained. In addition, an umbrella-shaped opening/closing shutter 14 is fitted to the upper part of the container 10 so as to be able to move up and down, and a rod 15 attached to the opening/closing shutter 14 has a vibration core 16 and a suction core 17. are provided for each.

Note that a detection electrode 18 is attached to the surface of the opening/closing shutter 14 at a position facing the detection electrode 7, and by conducting a current between both detection electrodes 7 and 18, the moisture value of the paddy is automatically displayed on the meter 19. .

Next, the operation of the present invention will be explained.

Now, when the vibration coil 11 and the adsorption coil 12 are not in operation as in the state shown in FIG. While the paddy is distributed in the distribution interval 20 along the shutter 14, some of the paddy is distributed in the distribution path 9. When it is desired to quickly and accurately detect the moisture content of the circulating paddy in such a distribution state of paddy, the vibration coil 11 and the adsorption coil 12 are energized to be in operation, and the opening/closing shutter 14 is activated by the adsorption coil 12. By adsorbing the adsorption iron core 17, it is quickly raised, and the movable hopper 4 is moved up while closing the drop port 5.
At the same time, the opening/closing shutter 14 is vibrated due to the relationship between the vibration coil 11 and the vibration core 16. As a result, the paddy that had been freely circulating in the movable hopper 4 until now stopped flowing, and at the same time, the paddy that had entered the moisture detection chamber 6 was gradually compressed as the drop port 5 was closed. Since a vibration effect is applied under these conditions, the paddy stored in the moisture detection chamber 6 is maintained at a constant stacking density. Therefore, if a current is passed between the pair of detection electrodes 7 and 18, the moisture content of the paddy will be quickly measured by the meter 19.
The moisture content of paddy can be detected accurately and quickly.

During the above-mentioned paddy detection operation, the paddy overflowing from the movable hopper 4 is smoothly distributed through the flow path 9. When the moisture content detection work of paddy is completed, if the power to the vibration coil 11, the adsorption coil 12, and the pair of detection electrodes 7, 18 is cut off, the opening/closing shutter 14
The movable hopper 4 also lowers automatically with the lowering operation of the paddy, and the drop port 5 is opened to quickly discharge the paddy in the moisture detection chamber 6.The paddy in the paddy passage 1 is also distributed in the same manner as at the time of startup. can be done.

In short, in the present invention, a movable hopper 4 having a drop opening 5 at the bottom is disposed above a hollow moisture detecting body 2 disposed in a paddy passage 1, and a detection electrode is provided inside the movable hopper 4. 7, and a moisture detection chamber 6 with an open bottom end is fixedly installed, and a movable hopper 4 is pushed up while closing the droplet 5 by suction operation of an adsorption coil 12 directly below the droplet 5 to form a moisture detection chamber. An opening/closing shutter 14 with a detection electrode is arranged so as to be able to move up and down.The opening/closing shutter 14 is equipped with a detection electrode that compresses the rice grains that have fallen into the moisture detection chamber 6 and at the same time vibrates the rice grains in the moisture detection chamber 6 using a vibration coil 11 to equalize the stacking density. Therefore, the paddy flowing through the paddy passage 1 can be quickly and easily stored in the moisture detection chamber 6 at a constant pile density at any time, and the moisture content of the paddy can be accurately and automatically detected. Of course, even at the end of detection, the paddy inside the moisture detection chamber 6 can be quickly discharged just by the downward movement of the opening/closing shutter 14, and the moisture detection work of the paddy can be accomplished at any time even when the moisture detection state is in progress. It has the effect of making it possible to

[Brief explanation of the drawing]

The drawings show an embodiment of the device of the present invention, in which Fig. 1 is a partially cutaway longitudinal front view during non-moisture detection work, and Fig. 2 is a partially cutaway longitudinal front view during moisture detection work. It is. 1...Paddy passageway, 2...Moisture detection body, 4...Movable hopper, 5...Drop opening, 6...Moisture detection chamber, 7
...detection electrode, 11 ... vibration coil, 12 ... adsorption coil, 14 ... opening/closing shutter, 18 ... detection electrode.

Claims (1)

[Claims] 1. A movable hopper with a drop opening at the bottom is disposed above a hollow moisture detection body disposed in the paddy passage, and a detection electrode is provided inside the movable hopper, but the lower end is open for moisture detection. The chamber is fixedly installed, and the movable hopper is pushed up while closing the drop port by suction operation of a suction coil directly below the drop port to compress the paddy that has fallen into the moisture detection chamber. An automatic moisture detection device characterized by an opening/closing shutter equipped with a detection electrode that can be moved up and down to equalize the density of paddy accumulation by imparting vibration to the rice.