WO2020179060A1

WO2020179060A1 - Moisture measuring device

Info

Publication number: WO2020179060A1
Application number: PCT/JP2019/009116
Authority: WO
Inventors: 由武青島; 正史砂田
Original assignee: 静岡製機株式会社
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2020-09-10
Also published as: JP7162805B2; CN113518915A; JPWO2020179060A1; KR20210119519A

Abstract

Provided is a moisture measuring device which does not require useless wiring work, can measure more accurate moisture of grain regardless of an amount of the grain, and consequently has high versatility.　A moisture measuring device 10 for measuring a moisture amount of grain comprises a temperature sensor 44 that measures temperature of a space through which the grain passes and a measurement unit 31f that measures a moisture amount of a part of the grain passed through the space. The measurement unit 31f corrects the measured moisture amount of the grain on the basis of the temperature measured by the temperature sensor 44.

Description

Moisture measuring device

The present invention relates to a moisture measuring device for measuring the moisture content of grains.

Conventionally, as this type of moisture measuring device, for example, a grain dryer for drying grains is provided, and in order to confirm the degree of drying of grains, the moisture content of the grains is a part of the stored grains. It is known to measure the amount of water contained in the grain (see, for example, Patent Document 1).

The moisture measuring device is provided with a moisture measuring mechanism including a pair of rollers and a measuring unit for measuring the electric resistance value between the paired rollers. The moisture measuring device, in the moisture measuring mechanism, crushes the grain between the outer peripheral surfaces of the pair of rollers, and by measuring the electric resistance value between the pair of rollers by the measuring unit, the grain in the crushed state is obtained. The amount of water contained is measured electrically.

Japanese Patent No. 6127584

By the way, the measured electrical resistance value changes under the influence of grain temperature. Therefore, the water content measuring device cannot accurately measure the water content of the grain only by measuring the electric resistance value when crushing a part of the grain. Therefore, the water content measuring device corrects the water content of the grain based on the temperature of the grain.

However, in many grain dryers, the moisture measuring device has a moisture measuring mechanism attached to the lower part of one side of the grain dryer having a vertically extending grain raising section. On the other hand, the temperature sensor that measures the temperature of the grain is provided inside the grain shedding cylinder that sends the grain conveyed by the grain collecting unit located below the grain dryer to the fried unit. ..

Therefore, in the moisture measuring device, it is necessary to extend the cord, etc. from the moisture measuring mechanism to the temperature sensor in the grain basket and connect the moisture measuring mechanism and the temperature sensor. In such a moisture measuring device, the wiring work between the moisture measuring mechanism and the temperature sensor by the operator becomes complicated.

Also, there is not enough grain in the fried grain section to measure the grain temperature directly. Therefore, the moisture measuring device cannot accurately correct the moisture content of the grain based on the temperature of the grain in the fried portion.

In this way, the conventional moisture measuring device cannot measure the accurate moisture content of the grain without complicated wiring work, so it was not possible to realize a highly versatile moisture measuring device.

In order to solve the above problems, the present invention is a moisture measuring device for measuring the moisture content of a grain, comprising: a temperature sensor for measuring the temperature of a space through which the grain passes; and a grain sensor that passes through this space. And a moisture measuring unit for measuring the moisture amount of the grain of the grain, the moisture measuring unit correcting the measured moisture amount of the grain based on the temperature measured by the temperature sensor.

According to the water content measuring device of the present invention, since the temperature sensor for measuring the temperature at which the grain passes is provided, there is no problem that the wiring work between the water content measuring mechanism and the temperature sensor by the operator becomes complicated. Further, according to the water content measuring device of the present invention, a more accurate water content of the grain can be measured regardless of the amount of the grain. That is, according to the moisture measuring device of the present invention, since the accurate moisture content of grain can be measured without performing a complicated wiring work, a highly versatile moisture measuring device can be realized.

It is a schematic block diagram of the grain dryer which shows one Embodiment of this invention. It is the whole moisture measuring device perspective view. It is a side sectional view of a moisture measuring device. It is a front sectional view of a moisture measuring device. It is a figure for demonstrating the moisture measurement part.

1 to 5 show an embodiment of the present invention.

The moisture measuring device 10 of the present invention is provided in the grain dryer 1 as shown in FIG. The grain dryer 1 includes a storage unit 2 for storing grains, a drying unit 3 for drying grains, a grain collecting unit 4 for collecting grains falling from the drying unit 3, and a grain collecting unit 4. It is provided with a fried grain portion 5 for returning the collected grain to the storage portion 2, and a flow grain barrel 7 for sending the grain from the grain collection portion 4 to the fried grain portion 5.

The storage unit 2 is located on the upper side of the grain dryer 1 and stores grains.

The drying unit 3 is provided below the storage unit 2 and heats the grain falling from the storage unit 2 by the circulation operation by, for example, far-infrared rays or hot air to reduce moisture contained in the grain.

The grain collecting unit 4 is provided below the drying unit 3 and collects the grains falling from the drying unit 3 by the circulation operation.

The fried grain unit 5 is provided so as to extend vertically on the side surfaces of the storage unit 2, the drying unit 3, and the grain collection unit 4, conveys the grain collected in the grain collection unit 4 upward, and Release to the top. Further, at the lower part of the fried grain section 5, an input port 6 for inputting grains to be dried by the grain dryer 1 is provided. The grain input from the input port 6 is conveyed upward by the fried grain unit 5 and discharged to the upper part of the storage unit 2. Further, a discharging unit for discharging the grains contained in the internal space is provided above the fried grain unit 5.

As shown in FIG. 1, the grain shedding cylinder 7 is provided at a position in contact with the right end of the grain collecting unit 4. The grain shedding cylinder 7 forms a delivery path for delivering grains from the grain collecting unit 4 to the fried grain unit 5. The grain collecting unit 4 has a transport mechanism 401 that transports the falling grain to the grain shedding cylinder 7. The transport mechanism 401 has teeth that spirally protrude with respect to the rotation axis, and the rotation of the teeth causes the descending grain to be transported from the left side to the right side in FIG. In this way, the grain is transported from the grain collecting section 4 to the drifting grain tube 7, and is sent from the flowing grain section 7 to the frying section 5.

The grain dryer 1 configured as described above is configured to circulate grains in the order of the storage unit 2, the drying unit 3, the grain collecting unit 4, the grain mixing cylinder 7, and the fried grain unit 5.

The water content measuring device 10 of the present invention is attached to the lower side of the side of the fried grain portion 5 extending in the vertical direction, that is, the lower side of one side of the grain dryer 1. The water content measuring device 10 measures, as the water content of the grain, the water content contained in a part of the grain of the grain that is conveyed upward in the fried grain unit 5 every predetermined time.

In the present embodiment, the “water content” is “weight of water”, “volume of water”, and “weight of water” which is a ratio (ratio) of the weight of water of the grain to the weight of the whole grain. It may mean either "ratio" or "water volume ratio" which is the ratio (ratio) of the water content of the grain to the total volume of the grain.

The grain dryer 1 detects that the moisture content of the grain measured by the moisture measuring device 10 has reached a preset moisture content during the grain drying operation, and the drying unit 3 and the grain collecting unit It is possible to stop the operation of 4 and the frying section 5.

As shown in FIGS. 2 to 4, the moisture measuring device 10 is provided with a housing 20 formed so as to project from the side surface of the fried portion 5, and is provided in the housing 20 to measure the amount of moisture contained in the grain. It is provided with a water content measuring mechanism 30 for measuring the water content and a grain supply mechanism 40 for supplying grains to the water content measuring mechanism 30.

As shown in FIG. 2, the housing 20 has a box shape extending vertically. As shown in FIG. 3, the housing 20 is attached to the side wall of the fried portion 5 with the first side surface 21 facing the fried portion 5. The bottom surface 22 of the housing 20 is inclined downward from the second side surface 23 facing the first side surface 21 toward the first side surface 21. The third side surface 24 adjacent to the first side surface 21 of the housing 20 is provided with a peep window 24a for allowing the inside of the housing 20 to be visually recognized from the outside.

As shown in FIG. 4, the inside of the housing 20 is divided into a first space 20a on the third side surface 24 side and a second space 20b on the fourth side surface 25 side facing the third side surface 24 by the partition wall 26. It is partitioned. An inlet 21a for taking in grain is provided in an upper portion of the first side surface 21 of the housing 20 on the first space 20a side. Further, as shown in FIG. 4, a discharge port 21b for discharging the grain of which the moisture content is measured by the moisture measurement mechanism 30 is provided in the lower portion of the first side surface 21 of the housing 20 on the first space 20a side. ing.

As shown in FIGS. 3 and 4, the moisture measuring mechanism 30 is provided for each grain size for measuring the moisture content, and has a plurality of moisture measuring units 31 for crushing the grains and a plurality of moisture measuring units. It has an electric motor 32 as a power source for driving 31 and a driving force transmission mechanism 33 for transmitting the driving force of the electric motor 32 to the plurality of moisture measuring units 31.

The plurality of moisture measuring units 31 include a first rotating shaft 31a and a second rotating shaft 31b that are driven by the driving force of the electric motor 32, a first roller 31c supported by the first rotating shaft 31a, and a second rotating shaft. The electric resistance value is measured between the second roller 31d and the third roller 31e supported by the shaft 31b, the first roller 31c and the second roller 31d, or between the first roller 31c and the third roller 31e. And a measuring unit 31f that operates.

As shown in FIGS. 4 and 5, a substrate 31 g for controlling the moisture measuring device 10 is provided inside the housing 20. The substrate 31g is supported by the

support members

34a, 34b by being fixed to the

support members

34a, 34b protruding vertically from the first side surface 21 of the housing 20 with a fixing member such as a bolt. A measuring unit 31f is provided on the substrate 31g.

The first rotating shaft 31a and the second rotating shaft 31b are made of metal, respectively, and are arranged so that their central axes are parallel to each other in the horizontal direction in the first space 20a, as shown in FIGS. 4 and 5. Has been done. One end side of each of the first rotating shaft 31a and the second rotating shaft 31b is rotatably supported by the partition wall 26.

The first roller 31c is a metal cylindrical member fixed to the outer periphery of the first rotating shaft 31a. The outer peripheral portion of the first roller 31c is subjected to, for example, rolling knurling such as crocheting. Further, a rotating brush 31c1 and a scraper 31c2 are provided near the first roller 31c for removing debris of the grain adhering to the outer peripheral surface of the first roller 31c.

The second roller 31d is a metal cylindrical member fixed to the outer peripheral portion of the second rotating shaft 31b. The axial dimension of the second roller 31d is approximately half the axial dimension of the first roller 31c. As shown in FIGS. 4 and 5, a groove 31d1 is formed on the outer peripheral portion of the second roller 31d by, for example, rolling knurling such as slanting or flat stitching. The groove 31d1 is formed with a depth dimension capable of crushing small grains such as paddy and wheat between the outer peripheral portion of the first roller 31c and the outer peripheral portion of the second roller 31d.

The third roller 31e is a metal cylindrical member fixed to the outer peripheral portion of the second rotating shaft 31b. The axial dimension of the third roller 31e is approximately half the axial dimension of the first roller 31c, and is substantially the same as the axial dimension of the second roller 31d. As shown in FIG. 5, a groove 31e1 is formed on the outer peripheral portion of the third roller 31e by, for example, cutting knurling such as slanting or flattening. The groove 31e1 is deeper than the groove 31d1 of the second roller 31d, which is capable of crushing large grains such as soybeans and corn between the outer circumference of the first roller 31c and the outer circumference of the third roller 31e. It is formed to a size.

As shown in FIG. 5, the second roller 31d and the third roller 31e are arranged in the axial direction of the second rotating shaft 31b. In the present embodiment, the plurality of moisture measuring units 31 define a first moisture measuring unit 31A between the outer peripheral portion of the first roller 31c and the outer peripheral portion of the second roller 31d, and the outer peripheral portion of the first roller 31c and the third roller 31c. A portion between the outer peripheral portion of 31e and the outer peripheral portion is formed as a second moisture measuring portion 31B.

Further, in the vicinity of the second roller 31d and the third roller 31e, as shown in FIG. 3, a fixed brush 31d2 for removing grain fragments adhering to the outer peripheral surfaces of the second roller 31d and the third roller 31e. And a scraper 31d3 are provided.

Furthermore, each of the plurality of moisture measuring units 31 has a foreign matter removing structure for removing the foreign matter when a foreign matter such as a stone or a metal piece different from the grain is supplied. The foreign matter removing structure is configured such that a part of the outer peripheral portion of the first roller 31c, a part of the outer peripheral portion of the second roller 31d and the third roller 31e, or an outer periphery of the first roller 31c, the second roller 31d and the third roller 31e. It is formed by subjecting a part of the portion to a flat surface, which is so-called D-cut processing.

In the plurality of moisture measuring units 31, when the foreign matter is supplied while the first rotary shaft 31a and the second rotary shaft 31b are driven to measure the moisture content of the grain, the foreign matter is transferred to the

rollers

31c, 31d, 31e. The rotation of the first rotary shaft 31a and the second rotary shaft 31b is regulated by being bitten into. In the plurality of moisture measuring units 31, the state in which the rotations of the first rotating shaft 31a and the second rotating shaft 31b are restricted is detected, and the water content of the first rotating shaft 31a and the second rotating shaft 31b is measured when the water content is measured. The first rotating shaft 31a and the second rotating shaft 31b are rotated in the direction opposite to the rotating direction. As a result, the foreign matter put into the moisture measuring unit 31 has a gap formed by D-cut between the first roller 31c and the second roller 31d or between the first roller 31c and the third roller 31e. Is dropped and removed from the moisture measuring unit 31.

As shown in FIG. 5, the measuring unit 31f measures the electric resistance value between the first measuring point 31f1 connected to the first rotating shaft 31a and the second measuring point 31f2 connected to the second rotating shaft 31b. To do. The measurement unit 31f is arranged between the first measurement point 31f1 and the first measurement point 31f1 while the grain is sandwiched between the first roller 31c and the second roller 31d or between the first roller 31c and the third roller 31e. An electric circuit is formed between the two measurement points 31f2. The measurement unit 31f measures the amount of water contained in the grain by detecting the electric resistance value between the first measurement point 31f1 and the second measurement point 31f2. In addition, the measurement unit 31f corrects the measured water content contained in the grain by the method described below.

As shown in FIGS. 3 and 4, the electric motor 32 is provided in the upper part of the first space 20a and is fixed to the partition wall 26.

As shown in FIG. 4, the driving force transmission mechanism 33 is connected to the rotating shaft of the electric motor 32. Further, the driving force transmission mechanism 33 is connected to the first rotating shaft 31a and the second rotating shaft 31b. The driving force transmission mechanism 33 is provided in the second space 20b and fixed to the partition wall 26.

As shown in FIG. 3, the grain supply mechanism 40 is formed with a hopper 41 into which grains are inserted and a plurality of

communication passages

42a and 42b communicating with each other in the hopper 41 and the plurality of moisture measuring units 31. The communication member 42 and the grain moving plate 43 as a plurality of grain moving members for moving the grain thrown into the hopper 41 to a predetermined communicating path in the hopper 41 are provided.

As described above, the housing 20 is attached to the side wall of the fried grain portion 5 with the first side surface 21 facing the fried grain portion 5. Therefore, the hopper 41 is provided so as to be exposed in the internal space of the fried grain portion 5 on the upper side of the housing 20. The hopper 41 has a tubular shape with one end closed and the other end open. A part of the hopper 41 projects into the internal space of the fried grain portion 5 via the intake port 21a, and one end side of the tubular shape is directed obliquely downward. The opening on the other end side of the hopper 41 is directed obliquely upward in the fried grain portion 5. The hopper 41 is provided with a closing plate 41a that closes a part of the opening on the other end side in order to suppress the amount of grain input from the fried grain section 5 into the hopper 41.

The communication member 42 is a member in which a passage is formed that communicates with one end of the hopper 41 and above the plurality of moisture measuring units 31. Specifically, when viewed from the first side surface 21 side of the housing 20, a first communication passage 42a that communicates the hopper 41 and the first moisture measuring unit 31A is formed on the right side, and the hopper 41 and the second moisture measuring unit are on the left side. A second communication passage 42b that communicates with 31B is formed.

As shown in FIG. 3, a temperature sensor 44 is provided at a position on the first side surface 21 exposed in the internal space of the fried grain portion 5 and directly below the hopper 41. The temperature sensor 44 is composed of, for example, a diode. The temperature sensor 44 is a temperature sensor for measuring the temperature of the internal space of the fried grain portion 5. When the grain is conveyed from below to above by the fried portion 5, that is, when the grain passes through the internal space of the fried portion 5 from below to above, the temperature sensor 44 measures the temperature of the internal space. To do.

The reason for providing the temperature sensor 44 on the first side surface 21 exposed in the internal space of the fried grain portion 5 and directly below the hopper 41 is as follows: (1) Arrangement at various positions to obtain temperature data As a result of the experiment, optimum temperature data could be obtained at this position. (2) In the internal space of the fried portion 5, it is difficult for the grain passing from the bottom to the top to come into contact with the temperature sensor 44. Reasons such as being able to prevent damage to the sensor 44 can be mentioned.

As shown in FIG. 5, the temperature sensor 44 is connected to the measuring unit 31f on the substrate 31g by a cord or the like. As a result, the temperature data measured by the temperature sensor 44 is supplied to the measuring unit 31f.

When the data of the temperature of the internal space of the fried grain portion 5 through which the grain passes is supplied from the temperature sensor 44 provided immediately below the hopper 41, the measurement unit 31f receives the electric resistance value based on the temperature. The water content of the grain measured by the detection of is corrected.

Specifically, first, the measurement portion 31f is measured by the temperature sensor 44 immediately below the hopper 41, the temperature t _k of the internal space of the AgeKoku portion 5 cereal is passing, by the following Equation (1) , The grain temperature after estimation t _g is calculated.
t _g =at _k +b... (Equation 1)
t _g : Temperature of grain after estimation, t _k : Temperature of internal space of fried grain section 5 through which grain passes, a, b: Constants based on experimental data

Next, the measuring unit 31f corrects the water content of the grain measured by detecting the electric resistance value by the following (Equation 2).
Corrected grain water content = uncorrected grain water content + A · (Equation 2)
A: Correction value based on estimated grain temperature t _g

As described above, the moisture measuring device 10 uses the temperature of the internal space of the fried grain portion 5 through which the grain passes, which is measured by the temperature sensor 44 included in the moisture measuring device 10 itself, and the above (Formula 1) and The water content of the grain is corrected by (Equation 2). That is, the moisture measuring device 10 measures the more accurate moisture content of the grain by using the temperature of the internal space of the fried grain portion 5 through which the grain passes, without directly measuring the temperature of the grain. be able to. As a result, according to the moisture measuring device 10, it is not necessary to extend and connect the cord or the like from the moisture measuring mechanism to the temperature sensor in the grain cylinder. Therefore, according to the water content measuring device 10, the water content measurement mechanism and the temperature sensor in the grain rolling container must be connected, and there is no problem that the wiring work by the operator at that time is complicated.

Since the moisture measuring device 10 uses the temperature of the internal space of the fried portion 5 in correcting the moisture content of the grain, a more accurate moisture content of the grain can be obtained regardless of the grain amount. Can be measured.

As described above, according to the moisture measuring device 10, since it is possible to measure an accurate moisture content of grain without performing a complicated wiring work, it is possible to realize a highly versatile moisture measuring device.

In the present embodiment, an example in which two rollers such as the second roller 31d and the third roller 31e are supported by the second rotating shaft 31b has been described, but the present invention is not limited to this. One roller or three or more rollers may be supported by the second rotating shaft 31b.

1 grain dryer, 10 moisture measuring device, 31 moisture measuring unit, 31f measuring unit, 31g substrate, 31A first moisture measuring unit, 31B second moisture measuring unit, 41 hopper, 44 temperature sensor

Claims

A moisture measuring device for measuring the moisture content of a grain,
A temperature sensor that measures the temperature of the space where the grain is passing,
A moisture measuring unit that measures the moisture content of a part of the grains of the grain that has passed through the space,
The water content measuring unit is a water content measuring device that corrects the measured water content of grains based on the temperature measured by the temperature sensor.
The space through which the grain passes is an internal space of a grain frying section capable of transporting the grain, which is provided in a grain dryer for accommodating and drying the grain.
The moisture measuring device is attached to the fried portion,
The moisture measuring device according to claim 1, wherein the temperature sensor is provided at a position exposed to the internal space of the fried grain portion.
The moisture measuring device includes a hopper into which grains for measuring the amount of moisture are put,
The moisture measuring device according to claim 2, wherein the temperature sensor is located at a position exposed to the internal space of the fried grain portion and is arranged directly below the hopper.