JPH0442768Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a grain that is supplied between a pair of rotating electrode rolls and crushed, and the moisture content of the grain is detected by measuring the electrical resistance of the grain. This invention relates to a moisture content measuring device.

[Conventional technology]

In the drying process of grains, a grain moisture content measuring device is used to measure the moisture content of the grains in order to ascertain the degree of dryness.

This grain moisture content measuring device is provided with a pair of rotating electrode rolls. The grains are fed between the electrode rolls and crushed. Thereafter, the water content of the grains is detected by measuring the electrical resistance flowing through the grains between the electrode rolls.

In this case, the wider the gap between the electrode rolls, the better in terms of the ease with which grains can enter, but on the other hand, the grains that have entered cannot be sufficiently crushed, resulting in variations in the measured electrical resistance values, making it difficult to obtain accurate moisture content. I won't be able to do it. Therefore, in order to accurately detect the moisture content, it is desirable to narrow the gap between the electrode rolls and increase the crushing rate of the grains that have entered.

However, if the gap between the electrode rolls is narrowed, if grains such as wheat grains, which have a relatively large particle size and a slippery surface, are fed between the electrode rolls with their length direction parallel to the electrode roll axis, they will simply roll between the electrode rolls. There is a problem that it does not penetrate and is not crushed.

[Problem that the invention attempts to solve]

Taking the above facts into consideration, the present invention has developed a grain moisture content measuring device that allows grains to be smoothly guided and fed and to enter between the electrode rolls even when the gap between the electrode rolls is narrowed in order to accurately detect the moisture content. The purpose is to obtain.

[Means for solving problems]

It has a pair of electrode rolls arranged opposite to each other and rotates to crush the grains supplied to the opposing gap, and by measuring the electrical resistance value flowing between the electrode rolls through the grains. In the grain moisture content measuring device for measuring the moisture content of grains, a supply gutter is provided with a plurality of flow grooves corresponding to grain diameters and guides and supplies grains between the electrode rolls in the grain length direction. It is characterized by the fact that it is equipped with

[Effect]

In the grain moisture content measuring device of the present invention having the above configuration, the grains are guided along the flow groove provided in the supply gutter. Since the flow groove is provided in a size corresponding to the grain diameter of the grain, the grain is guided down along the flow groove in the grain length direction (longitudinal direction). For this reason, the grain enters between the electrode rolls rotating oppositely from the grain end (end in the grain longitudinal direction), and can be smoothly bitten into between the electrode rolls.

〔Example〕

Fig. 1 shows a grain moisture content measuring device 1 according to the present invention.
An exploded perspective view of the main parts of 0 is shown.

Grain moisture content measuring device 10 as shown in FIG.
A pair of electrode rolls 12 are disposed therein.
These electrode rolls 12 are made of a conductive metal material, and have a substantially disk-shaped measuring section 14 and a measuring section 14.
A shaft portion 16 protruding from the center toward one side in the axial direction.
is formed.

The peripheral wall 18 of the measuring section 14 is knurled and further has a spiral groove 20 formed therein. Furthermore, a notch 22 is formed in the measuring portion 14 in an arcuate shape extending over approximately 1/4 of the circumference. These electrode rolls 12 are inserted into a case 24 and supported so as to rotate around a shaft portion 16 .

The case 24 is an insulating member in which a pair of through holes 26 for supporting the electrode roll 12 are bored in the center, and the shaft portions 16 of the electrode roll 12 are respectively inserted into these through holes 26. It is designed to be pivotally supported via two ball bearings 28 at the front and rear, respectively. In this case, each electrode roll 1
The distance between the axes of the left and right through holes 26 is set so that the width of the gap between the two measurement parts 14 is somewhat narrower than the grain size of the grains, and the grains that have entered can be crushed.

Directly above the electrode roll 12, a supply gutter 30 is attached to the case 24 in an inclined manner. Supply gutter 30
is a grain guide plate in which a plurality of flow-down grooves 32 corresponding to grain diameters are provided in parallel with each other, and the grain flow-down surface is parallel to the axial direction of the electrode roll 12 and further inclined vertically. It is set up. Therefore, the flow groove 32 is oriented substantially tangentially to the measurement part 14, and the grains are guided down along the flow groove 32 in the grain length direction (longitudinal direction) to between the measurement parts 14 of the left and right electrode rolls 12. It is designed to be fed in the grain length direction.

A conductive contact terminal 34 is disposed to be sandwiched between each ball bearing 28 that supports the electrode roll 12 . The contact terminal 34 is a substantially C-shaped thin plate with one end bent inward to form a contact piece 36. This contact piece 36 is adapted to come into contact with the shaft portion 16 of the electrode roll 12. Further, a connecting terminal 38 is formed in the intermediate portion and is connected to a measuring circuit (not shown) via a lead wire.

Electrode gears 40 are coupled to the tips of the shaft portions 16 of the electrode rolls 12, which are pivotally supported by the case 24 by respective ball bearings 28, in a mutually meshed state. Therefore, as the electrode gear 40 rotates, the electrode rolls 12 rotate in opposition to each other.

A portion of the electrode gear 40 connected to the shaft portion 16 is made of an insulating material. Therefore, electrode roll 1
2 and the electrode gear 40 remain non-conductive even after being combined and integrated.

A drive motor 42 is disposed near the electrode gear 40. A motor gear 44 is fixed to the output shaft of the drive motor 42. Furthermore, an intermediate gear 46 is disposed between the electrode gear 40 and the motor gear 44 and is supported by an intermediate shaft 48, meshing with both gears. Therefore, the driving force of the drive motor 42 is transmitted to the electrode gear 40 via the intermediate gear 46, and the electrode roll 1 integrated with the electrode gear 40 is transmitted to the electrode gear 40 through the intermediate gear 46.
2 are rotated facing each other.

Next, the operation of this embodiment will be explained.

Fig. 2 shows a grain moisture content measuring device 1 according to the present invention.
0 is disposed near the grain conveyor bucket conveyor 50, and FIGS. 3 to 6 are illustrations of the operation of the electrode roll 12.

A portion of the grains scooped up into the bucket of the bucket conveyor 50 is always fed into the grain moisture content measuring device 10 following the path indicated by arrow A in FIG. When the grain moisture content measuring device 10 is in an inactive state, the notch 22 of the measuring section 14 is opened as shown in FIG.
Since the grains are stopped at positions facing each other, the fed grains are sent back to the bucket conveyor 50 through the gap between both notches 22.

The grain moisture content is measured by activating the grain moisture content measuring device 10 and rotating the electrode roll 12 to a sampling position. That is, the driving motor 42 is activated, and its driving force is transmitted to the electrode gear 40 via the intermediate gear 46. Therefore, the electrode roll 12 integrated with the electrode gear 40 is connected to the shaft portion 16.
4 to 6 in the direction of arrow B in FIGS. 4 to 6. Therefore, the grains that had been sent back to the bucket conveyor 50 through the gap between the notches 22 of the left and right measuring sections 14 now enter between the left and right measuring sections 14 in the state shown in FIG. become.

Now, in this case, there is a supply gutter 3 directly above the measuring section 14.
0 is arranged at an angle, and the grains are fed into the supply gutter 30.
It is guided along the flow groove 32 of. Since the flow groove 32 is provided with a size corresponding to the grain size of the grain, the grain is guided down in the grain length direction (longitudinal direction), and the grain is guided down by the measurement part 1 of the electrode roll 12 that rotates oppositely.
It enters into the 4 spaces from the grain end (end in the grain longitudinal direction). Therefore, the problem of the electrode roll 12 merely rolling between the measurement parts 14 and not penetrating therein is eliminated.

The grains that have entered between the measurement parts 14 are crushed as the electrode rolls 12 rotate as shown in FIG. Furthermore, as the grains are crushed, a measurement current is passed between the left and right electrode rolls 12 from a measurement circuit (not shown) via the contact terminals 34. The measuring circuit measures an electrical resistance value corresponding to the water content of the crushed grains interposed between the measuring parts 14, and further converts the electrical resistance value into a water content and displays it on a display part (not shown).

The crushed grains are sent back to the bucket conveyor 50 as the electrode roll 12 rotates as shown in FIG. Furthermore, when the measurement is completed and the drive motor 42 is stopped, the measuring section 14 moves to the notch 2.
2 stop at positions facing each other and wait for the next water content measurement (as shown in FIG. 3).

Although the present embodiment has a configuration in which the supply gutter 30 is disposed only on one side, the present invention is not limited to this, and may be disposed on both sides. In addition, the flow groove 3 of the supply gutter 30
Regarding the cross-sectional shape of 2, arc-shaped, wavy, V-shaped,
Any other shape may be used as long as it guides the grains downward in the grain length direction.

Further, in this embodiment, the left and right electrode rolls 12 are arranged horizontally (at the same vertical position) with respect to the case 24, but the structure is not limited to this, and even if the left and right electrode rolls 12 are arranged at different heights vertically. good. FIG. 7 shows a layout diagram of the electrode roll 12 according to this second embodiment.

In this case, as shown in FIG.
The electrode roll 12 immediately below 0 is the other electrode roll 1
It is located at a lower position than 2. That is, a line connecting the rotation axes of both electrode rolls 12 (Fig. 7C
line) will be inclined with respect to the case 24.
In this second embodiment, compared to the case where the left and right electrode rolls 12 are arranged at the same vertical position with respect to the case 24 as in the first embodiment, the grains guided and flowed down are placed on the electrode rolls 12. This will lead to a more direct entry into the center of space. Therefore, supply efficiency is further improved.

[Effect of idea]

As explained above, the grain moisture content measuring device according to the present invention has a pair of electrode rolls that are arranged opposite to each other and rotate and crush the grains supplied to the opposing gap. By measuring the electrical resistance value flowing between the electrode rolls through
The grain moisture content measuring device for measuring the moisture content of the grains includes a supply gutter that is provided with a plurality of flow grooves corresponding to grain diameters and guides and supplies the grains between the electrode rolls in the grain length direction. This feature allows the grain to enter between the opposing rotating electrode rolls from the grain end (end in the longitudinal direction of the grain), and even when the gap between the electrode rolls is narrowed. It has the excellent effect of increasing the grinding rate of grains and allowing accurate detection of moisture content.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of essential parts of the grain moisture content measuring device according to the present invention, Fig. 2 is a sectional view of the same device, and Fig. 3
6 to 6 are explanatory diagrams of the operation of the electrode rolls, and FIG. 7 is a layout diagram of the electrode rolls according to the second embodiment. 12... Electrode roll, 14... Measuring section, 16...
...Shaft part, 22... Notch part, 30... Supply gutter, 32
...Flowing ditch.

Claims (1)

[Scope of utility model registration request] It has a pair of electrode rolls arranged opposite to each other and rotates to crush the grains supplied to the opposing gap, and by measuring the electrical resistance value flowing between the electrode rolls through the grains. In the grain moisture content measuring device for measuring the moisture content of grains, a supply gutter is provided with a plurality of flow grooves corresponding to grain diameters and guides and supplies grains between the electrode rolls in the grain length direction. A grain moisture content measuring device characterized by comprising: