JPS6242351Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an automatic moisture detection device that can accurately and efficiently detect the moisture content of grain flowing down inside a case at any time.

When measuring the moisture content of grain while it is being moved, if the grain is not maintained at a constant density, even if the moisture content of the grain is constant, it may be due to changes in the piled density of the grain itself. It is well known that moisture measurements change automatically.

Therefore, in order to make the accumulated density of the grains approximately uniform, the moving grains are stored in a suitable container and a vibration effect is applied to the grains to make the density uniform, thereby making it possible to obtain even more accurate moisture measurement values. I'm trying to get it.

By the way, a lot of dust such as straw is mixed into the grain, so even if the detection container is vibrated during detection to make the accumulated density of the stored grain uniform, the amount of dust mixed in will be reduced. However, it is not possible to accurately equalize the grain density due to the grain density, and as a result, it is not possible to measure accurate moisture values, but the vibration mechanism of the detection container is complicated and expensive, which is a drawback that is strongly desired to be improved. was.

In view of the above, the present invention has been developed by suspending a detection container, which contains a portion of the grain flowing down inside the case from the sample input port toward the sample discharge port and performs moisture detection work, through a pair of left and right elastic supports. At the same time, the other end of one of the elastic supports is directly connected to a rotation shaft of a forward/reverse rotation mechanism, and the detection container is formed so as to be able to be reversed upward or downward by the forward/reverse rotation of the rotation shaft. Grains can be stored or discharged easily, and when detecting the moisture content of grains, the grains can be stored in the detection container from the sample input port through the rotating operation of a blower impeller and vibration generator that are directly connected to a single electric motor shaft. The dust particles in the grains are blown away by the generated sorting air, allowing only the grains to be contained. At the same time, the detection container is slightly vibrated to further equalize the grain accumulation density, making it possible to reduce the cost at any time. The present invention is intended to provide an automatic moisture detection device that can automatically perform accurate moisture detection using a detection device, and the configuration of the device of the present invention is shown in the attached drawing below. An example will be explained.

In the drawings, reference numeral 1 denotes a rectangular cylindrical case through which the grain to be detected can freely flow down, and the upper part of the case 1 includes a sample input port 2 through which the lower end of a supply tube 4 connected to the grain circulation path is inserted. A sample discharge port 3 at the bottom that returns the grain that has flowed down inside the case 1 to the circulation path
Open it. Inside the case 1, that is, directly below the sample input port 2, a cup-shaped detection container 5 having an inlet port 7 is positioned.
is suspended by a pair of left and right elastic supports 8, 8, which extend across both left and right sides of the holding member 6, which is integrally provided therewith, and the left and right inner surfaces of the case 1.

A sorting air passage 9 with a discharge port 10 facing directly below the sample input port 2 is attached to one side of the case 1, and an electric motor 1 is attached to one side of this sorting air passage 9.
One end of one motor shaft 12 is passed through the screening air passage 9 and one of the elastic supports 8, and is mounted on the bearing portion of the holding member 6. An unbalanced weight 1 is attached to the peripheral end of the motor shaft 12 near the bearing side.
A vibration generator 13 attached with a vibration generator 4 is connected directly to the motor shaft 12 in the sorting air passage 9, and a blower impeller 15 is directly connected to the motor shaft 12 in the sorting air passage 9. Spray it directly below the input port 2.

The other end of the elastic support 8 attached to one side of the holding member 6 holding the detection container 5 is directly connected to the rotation shaft 20 of the forward/reverse rotation mechanism 16, and is rotated upward and forward by the forward/reverse rotation of the rotation shaft 20. Moreover, this forward/reverse rotation mechanism 16 has a forward/reverse rotation electric motor 17, a speed reducer 18, and a rotating circle, as shown in FIGS. 1 and 3. It consists of a plate 19 and a rotating shaft 20, and on the circumferential surface of the rotating disk 19 are position signal switches 21 and 22 that output signals to respectively display the upward or downward position of the detection container 5. It is arranged. The switches 21 and 22 are designed to generate a signal when they engage with a recess 23 formed on the circumferential surface of the rotating disk 19. Therefore, when the switch 21 engages with the recess 23, the detection container 5 The switch 22 is turned upward to allow reception of the grain flowing down and moisture detection work is possible, and the switch 22
3, the detection container 5 faces downward and cannot receive grain, indicating a state in which moisture detection cannot be performed.

A moisture detector 24 for automatically detecting moisture in the grain to be detected is installed inside the cup-shaped detection container 5 described above. A capacitive type is shown in the embodiment of the present invention. That is, an annular central electrode 25 and a peripheral electrode 26 are embedded approximately at the center of the detection container 5 and on the inner circumferential surface opposite thereto.
5, and a lead wire 2 connected to the surrounding electrode 26
7 is connected to the input end of a suitable capacitance meter 28 to automatically detect the moisture content of the grain to be detected.

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

If you want to automatically detect the moisture content of the grain to be detected, which is currently flowing down inside the case 1 from the sample input port 2 toward the sample discharge port 3 and is mixed with a lot of dust,
First, if the detection container 5 is rotated in the forward direction using the forward/reverse rotation mechanism 16 so that the inlet port 7 faces upward, the position is immediately detected by the switch 21, and the forward/reverse rotation mechanism 16 is stopped to ensure that the detection container 5 is correctly rotated. It is in an upward state. When the electric motor 11 is rotated at the same time as the forward/reverse rotation mechanism 16 is started, the vibration generator 13 directly connected to the electric motor shaft 12 and the blower impeller 15 rotate together, causing the entire detection container 5 to vibrate slightly at an appropriate frequency. At the same time, the sorting air is sent from the discharge port 10 to the sample input port 2.
Squirt directly below. Therefore, the grains to be detected that are about to fall into the detection container 5 from the sample input port 2 are sorted by the ejected sorting air, blowing away many dust particles mixed in the grains, and sorting them.
Only the grains are reliably dropped into the detection container 5 from the drop-in port 7, and the grains to be detected are accommodated in a piled state of a constant density by the action of microvibration. Therefore, the moisture content of the grain can be detected quickly by the central electrode 25 and the peripheral electrode 26 because the grain to be detected does not contain any dust or other substances, and is stored in a state of accumulation with a constant density. and done accurately. When the detection container 5 is subjected to micro-vibration work, the micro-vibration movement is absorbed by the left and right elastic supports 8, 8 to prevent other members from being subjected to micro-vibration. When the moisture detection work of the grain to be detected is completed in this way, by reversing the forward/reverse rotation mechanism 16, the upward-facing detection container 5 will be directed downward.
Since the rotation is reversed by 180 degrees and stopped by the switch 22, the stored grains to be detected are quickly discharged into the case 1.

Note that during this discharge work, the operation of the electric motor 11 may be stopped.

In short, the present invention provides the sample input port 2 above,
In addition, a holding member 6 is integrally provided around the periphery of the case 1 with a sample outlet 3 provided at the bottom, and a cup-shaped detection container 5 equipped with a moisture detector 24 inside is attached to both left and right sides of the holding member 6 and the case. It is suspended via a pair of left and right elastic supports 8, 8 installed across the left and right inner surfaces of , rotating shaft 20
The detection container 5 is reversed upward or downward by the forward/reverse rotation operation, and the detection container 5 generates vibrations in the motor shaft 12 equipped with the blower impeller 15 that blows out the sorting air to the lower part of the sample input port 2. Since the body 13 is directly connected, even if a large amount of dust is mixed in the grain to be detected, the dust is quickly blown away by the sorting air, and only the grain is reliably contained in the detection container 5. The elastic supports 8, 8 are used to prevent micro-vibration movements in order to accurately hold the grain in a state of accumulation of density, thereby allowing the moisture detector 24 to detect the moisture value of the grain to be detected more accurately.
In addition, the generation of the sorting air and the generation of slight vibrations are performed by the rotation of a single motor shaft 12. The device has a simpler configuration and can be provided at a lower cost, and has practical effects such as being able to easily detect moisture in grains at any time by reversing the detection container 5.

[Brief explanation of the drawing]

The drawings show an embodiment of the device according to the present invention, in which FIG. 1 is a partially cutaway longitudinal sectional front view, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. is a sectional view taken along the line B-B in FIG. 1; DESCRIPTION OF SYMBOLS 1... Case, 2... Sample input port, 3... Sample discharge port, 5... Detection container, 6... Holding member, 8,
8...Elastic support, 12...Electric motor shaft, 13...
Vibration generator, 15...Blower impeller, 16... Forward/reverse rotation mechanism, 20... Rotating shaft, 24... Moisture detector.

Claims (1)

[Scope of utility model registration request] A holding member is integrally installed around the case, which has a sample input port at the top and a sample discharge port at the bottom.
A cup-shaped detection container equipped with a moisture detector inside is suspended via a pair of left and right elastic supports installed across the left and right sides of the holding member and the left and right inner surfaces of the case. The other end of the tool is directly connected to the rotation shaft of the forward/reverse rotation mechanism, and the detection container is reversed upward or downward by the forward/reverse rotation operation of the rotation shaft, and a sorting air is ejected to the lower part of the sample input port. An automatic moisture detection device characterized in that a vibration generator for vibrating the detection container is directly connected to a motor shaft equipped with a blower impeller.