JPS6148657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a grain moisture measuring device.

BACKGROUND ART Conventionally, as a grain moisture measuring device, one is known that measures the moisture content of grains by supplying grains between electrostatic electrodes and measuring the capacitance. The shape of the sensor part to which the electrostatic electrode is attached is either flat or cylindrical, but regardless of the shape, the density of the grain in the sensor part is kept constant when measuring moisture content. It was difficult.

Problems to be Solved by the Invention An object of the present invention is to address the above-mentioned problems by actively increasing and stabilizing the grain density of the grain layer generated near the sensor unit that measures capacitance. An object of the present invention is to provide a grain moisture measuring device that prevents variations in measurement values and wave errors.

Means for Solving the Problems In the grain moisture measuring device of the present invention, a sensor section equipped with an electrostatic electrode is provided in a moisture measuring chamber, and a grain feeding conveyor is installed in the upper part of the measuring chamber, and a grain feeding conveyor is installed in the lower part of the measuring chamber. A grain discharge conveyor is installed horizontally in each of the grain supply conveyors, and the grain supply conveyor and the grain discharge conveyor are connected such that the transportation capacity of the grain supply conveyor is larger than the transportation capacity of the grain discharge conveyor. The structure is characterized in that it is configured as a resistance device.

Function: A grain supply conveyor horizontally suspended above the moisture measurement chamber transports the grains into the moisture measurement chamber, and the sensor unit measures the moisture value of the grains as capacitance, and the moisture value of the grains is measured as capacitance. A grain discharge conveyor provided at the bottom of the grain discharge conveyor discharges the grains in the moisture measuring chamber, and a resistance device in which the conveyance force of the grain supply conveyor is larger than the conveyance force of the grain discharge conveyor discharges the grains from the moisture measuring chamber. The grain density of the grain layer generated in the sensor section in the measurement chamber is actively increased, and the grain density near the sensor section is kept constant.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIG. A ventilation chamber 3 equipped with a generator 2 is provided,
Downstream type tempering chambers (not shown) are arranged on both sides of the blast chamber 3, and exhaust chambers (not shown) are provided outside the blast chamber 3. Hot air at a predetermined temperature from the air blowing chamber 3 is passed through the grain layer to dry the grain. A grain tank 4 is mounted on the upper part of the ventilation chamber 3 of the tempering section body 1, and an elevator 5 is provided on one side of the tempering section body 1. Grain circulation is provided near the upper and lower ends of the elevator 5. A stroke A is formed and connected to the refining unit body 1, and is connected to the grain tank 4.
A moisture measuring device 6 is attached to the side wall of the grain drying device, thereby configuring a circulating grain drying device.

As shown in FIG. 2, the moisture measuring device 6 has a box-shaped moisture measuring chamber 7 in which grains can be stored, and is attached and fixed to one side wall of the grain tank 4. A grain supplying screw conveyor 8 is suspended horizontally, and one end of the grain supplying screw conveyor 8 is fitted into a window 9 opened in the wall of the grain tank 4. A grain feeding port 10 is provided at the top of the protruding cylinder of the grain supply screw conveyor 8, and a plurality of discharge holes are provided at the bottom of the cylinder of the grain supply screw conveyor 8, which corresponds to the moisture measuring chamber 7. Openings 11a, 11b, and 11c are provided. A sensor section 12 formed in a flat plate shape is attached to the moisture measuring chamber 7. Flat sensor part 12
As shown in FIG. 3, an electrostatic electrode is embedded in the flat plate surface.

A grain discharging screw conveyor 14 is horizontally suspended in the lower grain discharging path 13 at the bottom of the moisture measuring chamber 7, and a grain discharging port 15 is provided at a part of the bottom portion of the screw conveyor 14. A second resistance device 16b is provided, which serves as another variable resistance device such as an on-off valve that finely adjusts the grain density in the moisture measuring chamber 7 by changing the outflow amount of the grain.

The other end of the shaft of the grain supply screw conveyor 8 is connected to an electric motor 20, and a pulley 17 serving as a drive wheel is integrally provided near the other end of the shaft, and the grain discharge screw conveyor 14 A pulley 18 having a larger diameter than the pulley 17 is integrally provided at the other end of the shaft, and a belt 19 is stretched between the pulley 17 and the pulley 18.

Pulley 17 of the screw conveyor 8 for grain supply and pulley 18 of the screw conveyor 14 for grain discharge
is formed to have a large or small diameter so that the first resistance device 1
6a, the first resistance device 16a is constructed by setting the transporting force of the grain supplying screw conveyor 8 to be larger than the transporting force of the grain discharging screw conveyor 14, and the electric motor 20 is used to supply the grains. The grain discharging screw conveyor 8 and the grain discharging screw conveyor 14 are configured to rotate in conjunction with each other at different rotational speeds.

At the bottom of the grain threshing port 15, there is a return channel 2 in the form of a gutter.
1 is provided, the lower end of the return flow path 21 is connected to the flow path 22 of the grain circulation process A of the grain tank 4,
The grain discharged from the moisture measurement chamber 7 is transferred to the grain tank 4.
It is designed to be returned to

Next, the operation of this embodiment will be explained.
The grains put into the grain tank 4 flow down to the downstream type tempering chamber provided in the lower tempering unit body 1 to generate a grain layer, and then pass laterally from the ventilation chamber 3 to the exhaust chamber. The grains are subjected to a drying action by hot air at a predetermined temperature from the heat generator 2, and then returned to the upper grain tank 4 through the grain circulation process A, where they are tempered. The drying and tempering process is repeated several times to temper the grains in the grain tank 4 so that they have a uniform predetermined moisture content.

When the electric motor 20 connected to the grain supplying screw conveyor 8 of the moisture measuring device 6 installed in the grain tank 4 is driven at a proper time during the tempering process, the grain supplying screw conveyor 8 rotates and its temperature increases. The grains in the grain tank 4 are continuously conveyed through the grain feeding port 10, and discharge openings 11a, 11b, 1 at the bottom of the barrel of the grain feeding screw conveyor 8 are used.
The grains flow down from 1c and are supplied to the sensor section 12 in the moisture measuring chamber 7.

After the grain moisture value in the moisture measurement chamber 7 is measured as capacitance by the sensor unit 12,
The grains are discharged from the discharging port 15 by the grain discharging screw conveyor 14, which rotates in response to the rotation of the pulley 17 of the grain supplying screw conveyor 8 via the belt 19 and pulley 18.

At this time, the first resistance device 16 is formed in which the diameters of the pulley 17 of the grain supply screw conveyor 8 and the pulley 18 of the grain discharge screw conveyor 14 are made large and small.
a, the grain feeding screw conveyor 8
Since the transporting force of the grain discharging screw conveyor 14 is made larger than that of the grain discharging screw conveyor 14, the grains near the sensor section 10 in the moisture measuring chamber 7 are appropriately pressurized and become a densely accumulated grain layer. , and its density becomes constant and stable, so the accuracy of the grain moisture value measured as capacitance by the sensor unit 12 improves, and the grain layer is in an appropriately compressed state. Therefore, variations in measurement values and wave errors are prevented.

The grain density in the moisture measurement chamber 7 can be finely adjusted by appropriately opening and closing the second resistance device 16b provided in the grain discharging port 15 to change the amount of grain flowing out from the grain discharging port 15. It is done by twisting.

In addition, the grain discharged from the grain discharging port 15 flows down a return flow path 21 provided at the lower part thereof, is sent to the flow path 22 of the lower grain circulation process A, and is sent via the elevator 5 to the upper grain circulation process A. The grain is returned to grain tank 4.

FIG. 4 shows another embodiment of the present invention, in which the flat sensor section 12 provided in the moisture measuring chamber 7 shown in FIG. 2 is replaced with a cylindrical sensor section 23.

The moisture measuring device can be installed not only in the grain tank of the drying device, but also in the grain tank of various tempering devices such as a humidifying device, or in the grain conveyance process, and can be installed horizontally in the moisture measuring chamber. The upper and lower conveyors are not limited to the screw type, and various conveyors can be used as desired.

The first resistance device may be any means for making the transporting force of the upper conveyor larger than the transporting force of the lower conveyor (by changing the pitch, rotation speed, or shape, etc.), and the second resistance device is used for moisture measurement. Any means for finely adjusting the grain density in the room (opening/closing valve, variable resistor, etc.) may be used, and it goes without saying that each resistance device can be modified as appropriate. In addition, a moisture measuring device is attached to the flowing tank, and the moisture meter and the stopping device are connected via an electric circuit to automatically stop the drying or humidifying process of grains when the moisture limit value is reached. It is also possible to use it as a stop device.

Effects of the Invention As described above, according to the grain moisture measuring device of the present invention, a sensor section equipped with an electrostatic electrode is provided in the moisture measuring chamber, and a grain feeding conveyor is installed in the upper part of the measuring chamber. Further, a grain discharge conveyor is installed horizontally at the bottom, and the grain supply conveyor and the grain discharge conveyor are connected to each other by using the transporting force of the grain supply conveyor as the grain discharge conveyor. By configuring the resistance device as larger than the transporting force of
It is possible to actively increase and stabilize the grain density of the grain layer generated in the sensor section in the moisture measuring chamber, thereby preventing variations in measurement values, wave errors, and the like.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a circulating drying device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same moisture measuring device as above, and FIG. 3 is a front view of the flat sensor section of FIG. 2. 4 are side views of a cylindrical sensor section according to another embodiment of the present invention. 1... Thermal refining unit body, 2... Fire heat generating device, 3...
...Blower room, 4...Grain tank, 5...Elevator, 6
... Moisture measuring device, 7... Moisture measuring room, 8... Screw conveyor for grain supply, 9... Window, 10...
...grain feeding opening, 11a, 11b, 11c...discharge opening, 12...sensor section, 13...lower grain threshing path,
14... Screw conveyor for grain discharge, 15...
...Grain threshing port, 16a...First resistance device, 16b...
...second resistance device, 17...pulley, 18...pulley, 19...belt, 20...electric motor, 21...
return channel, 22... channel, 23... sensor section,
A...Grain circulation process.

Claims (1)

[Claims] 1. A sensor section equipped with an electrostatic electrode is installed in a moisture measurement chamber, and a grain supply conveyor is installed in the upper part of the measurement chamber, and a grain discharge conveyor is installed in the lower part of the measurement chamber. A grain moisture measuring device characterized in that a resistance device is configured between the grain supply conveyor and the grain discharge conveyor so that the grain supply conveyor has a transportation force greater than that of the grain discharge conveyor. .