JPH01320458A - Instrument for measuring grain moisture - Google Patents

Abstract

PURPOSE:To shorten the time for measuring grains by controlling the rotating speed of the grain moisture detecting stroke of a pair of detecting rolls for detecting grain moisture to a low speed rotation with respect to the rotating speed at the time of a non-detection stroke. CONSTITUTION:The grains falling during transportation by a bucket conveyor 17 are received by a grain flow trough 20 and are supplied onto a feed roll 31. The grains are fed and fitted by each piece into spiral groves 32 of the roll 31 and while the grains are guided by a guide plate 35, the grains are supplied into a guide plate 36 and are dropped and guided so as to be supplied onto a pair of the detecting rolls 1. The grains are crimped and ground between the rolls 1 and the voltage waveforms of the ground grains are detected, by which the moisture of the grains is detected. The rotating speed of a speed change motor 41 is controlled to the low rotating speed within the prescribed time and the rotating speed of the rolls 31, 1 is lowered when the voltage waveforms arrive at the max. value point. The rotating speed is controlled to restore the high speed upon lapse of the prescribed time. The average moisture value of the 32 grains of the ground grains is computed by repeating the same and is detected as the grain moisture of one measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a grain moisture measuring device and can be used in grain dryers and the like.

Conventional technology In the past, a pair of detection rolls were used to detect the voltage of the crushed grains while crushing the grains by rotation, and to detect the moisture content of the grains. This is a grain moisture measuring device that detects grain moisture by controlling the rotation speed to be the same as the rotation speed during the non-detection process.

Problems to be solved by the invention For example, in a grain moisture measuring device installed in a grain dryer,
While the grains are being dried in this dryer, each part of the grain moisture measuring device is started by sending an electrical measurement signal, and some of the grains housed in the dryer and undergoing circulation drying are The grains are supplied from the machine into this grain moisture measuring device, and the grains are transferred one by one by a rotating transfer roll, and then supplied onto a pair of detection rolls, where they are fed onto the outer peripheral surface of the rotating detection rolls. At the same time as the crushed grain is crushed under pressure, the voltage of the crushed grain is detected, and the grain moisture is detected by this detected voltage. When the grain moisture measuring device detects the same grain moisture as the finishing target moisture of the grain, The dryer is automatically controlled to stop drying the grains.

Since the moisture content of grains during this drying process is measured one by one, for example, it took a long time to detect the moisture content of 32 grains, but this can be done in as short a time as possible. This is what we are trying to do.

Means for Solving the Problems This invention provides a pair of detection rolls (1), (1) which detect the voltage of the crushed grains while rotating them under pressure and crush the grains to detect the moisture content of the grains. The grain moisture measuring device is characterized in that the rotational speed during the grain moisture detection process is controlled to be lower than the rotational speed during the non-detection process.

Effect of the Invention In the grain moisture measuring device installed in the dryer, while the grains are being dried in the dryer, each part of the grain moisture measuring device is started by transmitting an electrical measurement signal, and the grain moisture measuring device is installed in the dryer. Some of the grains that are being circulated and dried are supplied from this dryer into this grain moisture measuring device, and the grains are transferred one by one by a rotating transfer roll and sent to a detection roll (1). , (1) is fed onto the outer peripheral surface of the rotating detection roll fl), +1), and at the same time the voltage of the crushed grain is detected, and the grain moisture is detected by this detected voltage. When the grain moisture measuring device detects a grain moisture content that is the same as the finishing target moisture content of the grains, the dryer is automatically stopped and the drying of the grains is stopped.

When measuring grain moisture during this grain drying operation, the rotation speed of the detection roll (11, fl) during the grain moisture detection process is controlled to be lower than the rotation speed during the non-detection process. The grains are then detected.

Effects of the Invention According to the present invention, the rotational speed of the detection roll (11, (1) during the grain moisture detection process during grain moisture measurement is as follows:
The grains are detected by controlling the rotation speed to be lower than that during the non-detection process.
.

EXAMPLE In addition, the grain moisture measuring device (3) attached to the dryer (2) will be explained in the rotation.

A storage chamber (5) is formed in the upper part of the tank wall (4) of the dryer (2), and a storage chamber (5) is formed on the lower side of the storage chamber (5). A drying room (7) is provided and communicated.

At the bottom of each drying chamber (7), there is a grain collection gutter (8) in which a transfer spiral is rotatably supported. 2) is equipped with an operating device (9) for starting and stopping the burner, and a burner case (10) containing a burner 0, and an exhaust fan (175) is installed on the rear tank wall (4). , on the upper side of the storage chamber (5) there is a ceiling plate f131 and a transfer gutter 04 equipped with a transfer spiral.
This storage chamber (5
) is provided with a supply port for supplying the transferred grains into the container, and a diffusion plate fist is provided below the supply port.

A grain raising machine (IG) is installed in the front part of the tank wall (4) on the front side, and a packet conveyor (m belt is stretched between the upper and lower pulleys, and a grain elevator (IG) is installed inside the tank wall (4). is provided with a dispensing tube (111) to communicate with the lower end and the grain collection gutter (8).
A supply @ (ILj) is provided between the end portion and the grain raising machine (1υ). The grains that fall while being conveyed to the upper part of the conveyor (■) are received by the grain gutter J, and the grains are guided down into the grain moisture measuring device (3) by the grain gutter (to). be.

The grain moisture measuring device (3) has front and rear plates 1), el),
It is formed into a box shape with the upper and lower plates (23, Qδ and the left and right horizontal plates (to), (to), and inside this box, each support metal plate (to), (to),
(5), (to) and partition plates (c), (to) are provided, and the transfer roll shaft (to) is attached to the support metal 4,
(5) and (to) are rotatably supported, the transfer roll 00 is fixed to one end of this transfer roll shaft (to), and a gear is fixed to the other end, and this transfer roll 011 The outer circumferential surface has spiral grooves (branches) that fit and transport grains one by one, and deep spiral grooves (branches) that allow residual grains that were not carried into the spiral grooves (branches) to leak out. ), and the upper part of the transfer roll Oυ has a shaft (b) attached to the support metal (
C) and (5) are fixed to each other, and a guide plate (to) having a width that is approximately the same as the full width of the transfer roll 011 is attached to this shaft (b), and the guide plate is in almost contact with the outer peripheral surface of one side of the transfer roll 0υ. It has a structure that is fixed to the.

The grains supplied from the flow grain trough (2) onto the transfer roll OD are forced into the spiral groove (support) of the transfer roll O11 one by one and fit into the spiral groove (support). It is transported along the guide plate (to) while being guided by the guide plate (to), and is supplied onto the downstream guide plate C (Q) provided below the end, and this downstream guide plate O
Q, the grains are guided downward and supplied onto a pair of detection rolls (1), (1) provided on the lower side.

Each of the detection rolls (1) is connected to the support metal (5),
A shaft (5) is fixed to one end of each detection roll shaft (5) which is rotatably supported by a shaft, and a gear is fixed to the other end. At the same time as the crushed grains are loaded and crushed under pressure, the voltage of the crushed grains is detected, and this detected voltage is calculated to detect the moisture content of the crushed grains. The structure is such that an average value of grain moisture is calculated and this calculated average value is used as the detected grain moisture of one measurement.

Below each of the detection rolls (1) are the cleaning roll shafts (towards).
are fixed by the supporting metals (A) and (5), and a cleaning metal (to) is fixed to each cleaning roll shaft (to), and each detection roll is rotationally driven by each cleaning metal (to). (1
) It is configured to remove crushed grains for which moisture has been detected adhering to the outer peripheral surface.

Between the support metal 4 and the support metal (5) below the cleaning metal (to), crushed grains for which moisture has been detected and residual grains leaking from the g-swivel (to) are placed. The grain raising machine ti
This is a configuration in which a discharge @(g) is provided which is returned and supplied into e.

At the upper part of the box body, the support metal is provided with a variable speed motor that rotates in forward and reverse directions and at variable speeds, and a gear is fixed to the shaft end of the variable speed motor. The gears of the shaft (to) and the gears of each of the detection roll shafts (equipment) are configured to mesh with each other, and by transmitting an electrical measurement signal from the operating device (9) at predetermined time intervals, The variable speed motor 6υ is configured to rotate in forward and reverse directions, and the forward rotation of the variable speed motor 6υ drives the transfer roll 0υ, each of the detection rolls (1), etc. in the normal rotation to detect grain moisture, Furthermore, when the grain moisture detection is completed, the variable speed motor rotates in the opposite direction, and the transfer roll OD, each detection roll (1), etc. are driven to rotate in the opposite direction.

It is configured to remove stagnant grains.

At the time of grain moisture detection, the grains are crushed between the detection rolls (1) and the voltage waveform of the crushed grains is detected, as shown in Fig. 3. When the maximum value (a) is reached, the rotational speed of the variable speed motor 0υ is controlled to a low rotational speed for a predetermined time stored in the CPU provided in the operating device (9), and when this predetermined time elapses. After that, it returns to the original high speed rotation.

Restoration control is performed by this c p v ha, and the grain moisture is detected after these low rotation speed and high rotation speed are repeated. This is a configuration in which the time until the waveform detection end point (b) is set.

Further, as shown in FIG. 6, when the detected voltage waveform reaches a level (c) or higher stored in the CPU 3, the rotational speed of the variable speed motor (c) is controlled to a low rotational speed.

The CPU 21 may be configured to restore the rotational speed to the original high speed when the rotational speed falls below the stored level (c).

By operating the operating device (9), the dryer (2) is started, and at the same time, the burner (1 [I) and the grain moisture measuring device (3) are started, and hot air is generated from this burner (111). The grains stored in the storage chamber (5) are transported from the storage chamber (5) into the drying chamber (7) by ventilation through the drying chamber (7) and suction and exhaust by an exhaust fan. While flowing down, it is exposed to this hot air and dried, and is fed out to the lower part by the feed valve (6) and flows down, and is transferred from the collecting @ (8) to the feed gutter (1) and into the grain raising machine fl by the lower transfer spiral. The packets are transported to the upper part of the packet conveyor (in the field) and are supplied into the transfer gutter 04 via the dispensing tube 08, and from this transfer@(b), they are transferred and supplied onto the diffusion plate fiIit by the upper transfer spiral, and this When the grain moisture measuring device (3) detects the same grain moisture as the finishing target after being uniformly diffused and returned to the storage chamber (5) by the diffusion plate (19) and then being circulated and dried, the operating device (9) The dryer (2) is automatically stopped under automatic control.

During this drying operation, the grains that fall while being conveyed to the upper part of the packet conveyor (r71) are received by the grain gutter (to) and guided down to the transfer roll OD of the grain moisture measuring device (3).
This grain moisture measuring device (3) is actuated by the transmission of an electrical measurement signal transmitted from the operating device (9) at predetermined time intervals, and the spiral groove (
The grains are inserted one by one into the A-swivel groove (support), are transferred while being guided by the guide plate 09, fall from the end, and are detected via the downward guide plate (end). roll (1),
(1), the grains are fed into the outer circumferential surface of the detection rolls (1), (1) and crushed under pressure, and the voltage of the crushed grains is detected. is detected, and when this detection voltage reaches the maximum voltage, the rotational speeds of the transfer roll 0υ and the detection rolls (1), (1), etc. are controlled to a low rotational speed, and when this voltage detection is finished, the Transfer roll O11 and the detection roll fll, +1
The average value of the 32 crushed grains is calculated while the rotational speed of the first grade is repeatedly controlled to a high rotational speed, and this calculated average moisture value is detected as the grain moisture of one measurement.

The crushed grains for which moisture has been detected and the remaining grains that are not fed into the fs spiral groove and leak from the spiral groove 03 are returned to the grain raising machine fIQ through the discharge gutter, where the grains are being dried. It is circulated and dried at the same time as the grain.

As shown in Fig. 7, a variable speed motor 03 that rotates forward and reverse and rotates at variable speeds is provided on the support metal (to) at the upper part of one box, and this variable speed motor (g) is configured to rotationally drive the transfer roll Oυ. At the center of the box body, the support metal Q1 is provided with a motor that rotates in forward and reverse directions, and this motor rotates the detection rolls fly and 11. 0 and the motor (2) rotate, the transfer roll 09 and the inspection roll (1), (1
) is rotationally driven, the grains transferred by this transfer roll Gυ are crushed under pressure between the detection rolls (1), (1), and the voltage waveform of this crushed grain is detected, as shown in FIG. , When this detected voltage waveform reaches the rising point (2), the variable speed motor 1 is controlled to stop, the transfer roll Cυ is stopped, and the grains are not transferred. When the measurement is completed and the detected voltage waveform falls to the (E) point, the variable speed motor f113 rotates again, and the transfer roll 0υ is driven to rotate again to feed and transfer the grains, and the transfer roll 00 is a structure in which rotation and stopping are performed alternately. There is no need to send two grains from this point.

Furthermore, the interval between the grains fed in earlier and the grains fed later can be minimized, and therefore the time required for measuring grains can be shortened.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side sectional view, Fig. 2 is a rear view, Fig. 3 is a diagram showing the relationship between voltage waveforms and rotation, and Fig. 4 is a partially sectional view. Overall side view of the dryer, No. 5
The figure is an overall front view of the dryer partially cut away, Figure 6 is a diagram of the relationship between voltage waveforms and rotation, Figure 7 is a side sectional view, Figure 8 is a rear view, and Figure 9 is voltage waveforms and variable speed motor. It is a relationship diagram with rotation. In the figure, code (1) indicates a detection roll.

Claims (1)

[Claims] A pair of detection rolls (1), (1) that detect the voltage of the crushed grains while crushing the grains under pressure by rotation and detect the grain moisture are controlled at the rotational speed of the grain moisture detection process. A grain moisture measuring device characterized by controlling the rotation speed at a low speed compared to the rotation speed during the non-detection stroke.