JPS6361610B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a grain drying device that dries grains by exposing them to drying air (hot air) while circulating them. A sampling device for measuring moisture content installed in the grain drying device so as to sample grain from the grain drying device and feed it to a moisture measuring device (moisture content detection device) in order to perform control and management. This relates to improvements to the device.

An object of the present invention is to make the grains sampled from inside the grain drying device become grains that are the correct average of the grains being dried in the grain drying device, and to simplify the sampling process. The purpose of this invention is to enable the measurement of moisture content to be carried out reliably and limited to the amount necessary for measuring the moisture content without impairing the function of the grain drying device.

In the present invention, as a means to achieve this objective, the grain drying device is equipped with a machine body so as to circulate the grains in the grain storage section (grain tank or tempering tank) inside the machine. On the wall of the circulation path,
A sampling port through which the grains flow out and a return port for returning the grains flowing out from the sampling port into the circulation path are provided such that the sampling port is located at the top and the return port is located at the bottom. Between the sampling port and the return port, a pair of sensor rolls constituting the detection section of the moisture content measuring device are arranged in parallel with a facing interval narrower than the grain size of the grain between them, and The sensor rolls are pivotally supported to rotate in synchronization, and each of the sensor rolls is provided with a notch in a part of its circumferential surface, and these notches face each other, so that grains received from the sampling port can be collected between them. The present invention proposes a sampling device for a moisture content measuring device in a grain drying device, characterized in that it is configured to form a spaced groove through which grains fall directly toward a return port.

Next, an example of implementation will be specifically described with reference to the drawings.

In FIGS. 1 and 2, 1 is used to load grains to be dried into a grain storage section 2 (grain tank or tempering tank) installed in the body a of the grain drying device A. , is an upper conveyor that is placed horizontally on the top of the machine a, and the discharge tube part 30 is installed at the top of the elevator 3 (bucket elevator) whose starting end in the conveying direction is installed next to the machine a. It is switchably communicated with a take-out cylinder 31 provided in the cylinder part 30 by a switching shutter, and the grains fried by the elevator 3 are fed to the grain storage part 2.

4, as shown in FIGS. 1 and 2, is a lower portion installed horizontally at the bottom of the body a of the grain drying device A to carry out the grains loaded in the grain storage section 2. The end of the conveyor projecting outward from the machine body a on the terminal side in the conveying direction is communicated with the lower part of the elevator 3, and the grains carried out are fried by the elevator 3 and taken out from the take-out tube. 31, and during drying work, cooperates with the elevator 3 and the upper conveyor 1,
The grains loaded into the grain storage part 2 are circulated and flowed. 33 is Baketto.

Reference numeral 5 denotes a window hole opened below the side wall 32 of the elevator 3, and as shown in FIG. has been done. A sensor box 61 is attached to the upper side of the vertical wall 60a of the machine casing 60, and a grain receiving port (sampling port) 62 and a return port 63, which communicate the interior of the sensor box 61 and the inner cavity of the elevator 3, are arranged vertically. They are provided on the vertical wall 60a with an interval l between them. Note that the sampling port 62 and the return port 63 are connected directly to the side wall 32.
In some cases, the window hole 5 is opened and the window hole 5 is omitted.

Inside the sensor box 61, as shown in FIG.
5 are positioned with their respective sensor roll shafts 64a and 65a parallel to each other horizontally in a direction orthogonal to the vertical wall 60a within a distance 1 between the receiving port 62 and the return port 63, and are rotated synchronously via a bearing 66. It is pivoted so that it can be moved. The pivot spacing is determined by the circumferential surfaces 64b, 65 of the pair of sensor rolls 64, 65.
b are set close enough to sandwich one grain, and the circumferential surfaces 64b, 65b are partially provided with notched surfaces 64c, 65c, and each of the notched surfaces 64
c and 65c can be stopped facing each other.

A gear 67 is provided at the extended end of each sensor roll shaft 64a, 65a (FIG. 3), and is interlocked with the motor M via a transmission gear (not shown).
A cam plate 69 that acts on a limit switch 68 is attached to one side of the gear 67.

As shown in FIG. 5, the cam plate 69 is formed by providing a bulge 69b in a part of the outer peripheral edge 69a of the disk.
As shown in FIG. 8, it rotates once every fixed period of time in response to a command from a controller (not shown) connected via a connector C. In the process of one rotation, a sampling (picking) signal and a measurement signal are emitted with a time lag by the limit switch 68, and the pair of sensor rolls 64 and 65 receive, measure, and drop the sample paddy. Each action is now controlled. Since the grains fed by the lower conveyor 4 form groups intermittently, the waiting time for receiving the sample rice is adjusted to the intermittency time.

The limit switch 68 has an operating rod 68a that is connected to the disk outer peripheral edge 69a of the cam plate 69 and the bulged portion 69.
This is a switch that switches between two signals, a sampling signal and a measurement signal, by connecting it to b.

That is, in FIG. 6I, while the operating rod 68a is connected to the bulging portion 69b of the rotating cam plate 69 from the rotation start end to the rotation end, the limit switch is activated to send the sampling signal. 68 is turned on, and the limit switch 68 is turned off in order to send a measurement signal. On the other hand,
In FIG. 6, while the actuating rod 68a is connected to the disk outer peripheral edge 69a of the rotating cam plate 69 from the rotation start end to the rotation end, the limit switch is activated to send a measurement signal. The limit switch 68 is turned on, and when the sampling signal is sent, the limit switch 68 is turned off. FIG. 7 shows that these relationships and the signals passing through the motor M form two systems.

7 is a grain, 70 is a sample paddy, and 8 is a groove.

The embodiment device configured as described above operates as follows.

Normal State (Stationary) As shown in FIG. 6, the pair of sensor rolls 64 and 65 are stationary with their notched surfaces 64c and 65c facing each other to form a groove 8 in which the sample rice 70 flows downward in the vertical direction. At this time, the rotation starting end of the bulging portion 69b of the cam plate 69 is at the uppermost position, and the operating rod 68a of the limit switch 68 abuts thereon and remains stationary.

Therefore, as shown in FIG.
All of the sample rice 70 that is thrown up by the grain receiving port 62 and enters it flows down the groove 8 in the direction of the arrow (Fig. 6), passes through the return port 63, and enters the lower part of the inner cavity of the elevator 3. be returned.

Sampling state (stationary) When the cam plate 69 rotates once every fixed period of time according to a command from the controller, first, the sixth
In the process of rotating as shown in the figure, a sampling signal is sent to the operating rod 6 as shown in Figure 6.
8a and a pair of sensor rolls 64 and 65
remains in the state shown in FIG. 6 for a predetermined period of time, for example, 30 seconds.

Therefore, as described above, the sample rice 70 that passes through the grain receiving port 62 and enters the circumferential surfaces 64b and 65b of the pair of sensor rolls 64 and 65.
It is received between.

During the measurement, near the end of or after the time during which the sampling signal is being sent, a measurement signal is sent, and from FIG. ing. That is,
An operating rod 68a of the limit switch 68 is in contact with a disc outer peripheral edge 69a of the cam plate 69.

Therefore, the sample rice 70 that was collected between the circumferential surfaces 64b and 65b of the pair of sensor rolls 64 and 65 is
5 rotates, its circumferential surface 64b
and 65b, and is forced to fall downward. During this time, the dryness of the sample rice 70 is measured by the resistance of the current flowing between the sensor rolls 64 and 65.

Then, when the cam plate 69 rotates once,
The pair of sensor rolls 64 and 65 also rotate once and return to the above-mentioned normal state and stand still, completing one cycle of measurement.

In this way, a predetermined paddy moisture content, e.g. 18
The cyclic drying continues with repeated measurements until the % is obtained.

As explained above, the sampling device for the moisture content measuring device in the grain drying device according to the present invention is used to collect grains stored in the grain storage section (grain tank or tempering tank) inside the grain drying device. A sampling port for draining grains and a return port for returning the grains flowing out from the sampling port to the circulation path are installed on the wall of the circulation path installed in the machine body so as to circulate the grains. A pair of sensor rolls constituting the detection section of the moisture content measuring device are provided between the sampling port and the return port on the outside of the wall portion, and grains are placed between them. The sensor rolls are arranged in parallel with a spacing narrower than the grain size of the sensor rolls, and are supported so as to rotate in synchronization, and a notch is provided in a part of the circumferential surface of each of the sensor rolls, and the notches are opposed to each other. By this,
Since a groove is formed between them, through which the grains received from the sampling port fall directly toward the return port, the pair of parallel sensor rolls themselves are continuously sampled. A state in which the sample paddy that comes is passed through as it is,
Since the sample paddy is dammed up and the moisture value is detected, the grains sampled from inside the grain drying device are correctly averaged over the grains being dried in the grain drying device. In addition to ensuring that the grains are
With a simple mechanism, the moisture content can be measured reliably and limited to the amount necessary for measuring the moisture content without impairing the function of the grain drying device.

[Brief explanation of drawings]

Figures 1 and 2 are general diagrams of a grain drying device in which the present invention can be implemented. Figure 1 is a schematic diagram of a cylindrical grain dryer, and Figure 2 is a box-type grain dryer. It is a schematic diagram of the state implemented in the grain drying device.
Fig. 3 is a longitudinal sectional front view of the main parts of the device of the present invention, Fig. 4 is a sectional view taken along the line - - of Fig. 3, Fig. 5 is a sectional view taken along the - line of Fig. An explanatory diagram of the operation of the main parts. Fig. 7 is an explanatory diagram of the relationship between the two signals acting on the device of the present invention and the limit switch motor/cam plate. Fig. 8 is an isolated diagram of the sampling device part of the device of the present invention. FIG. Explanation of drawing symbols A...grain drying device, C...connector, M...motor, a...body, 1...upper conveyor, 2...grain storage section, 3...elevator, 30...discharge tube section, 31...take-out tube, 32...Side wall, 33...Bucket, 4...Lower conveyor, 5...Window hole, 6...Moisture content measuring device, 60...Machine housing, 60a...Vertical wall, 61...Sensor box, 62...Intake port, 63...Return port,
64, 65...Pair of sensor rolls, 64a, 6
5a...sensor roll axis, 64b, 65b...circumferential surface, 64c, 65c...notch surface of sensor roll,
66...bearing, 67...gear, 68...limit switch, 68a...operating rod, 69...cam plate, 69a...disc outer periphery, 69b...bulge, 7...grain, 70...sample rice, 8...groove.

Claims (1)

[Claims] 1. A sampling port through which grains flow out is installed on the wall of a circulation path installed in the machine body to circulate the grains stored in the grain storage section (grain tank or tempering tank) inside the machine of the grain drying device. and a return port for returning the grains flowing out from the sampling port into the circulation path, the sampling port being located at the top and the return port being located at the bottom. A pair of sensor rolls, which constitute the detection part of the moisture content measuring device, are arranged in parallel with a spacing narrower than the diameter of the grain between them, and shafts are mounted so that they rotate in synchrony. By providing a notch in a part of the circumferential surface of each sensor roll and facing each other,
A sampling device for a moisture content measuring device in a grain drying device, characterized in that a gap groove is formed between them, through which the grains received from the sampling port fall directly toward the return port.