JPH01221617A - Grain flow rate detecting device - Google Patents

Abstract

PURPOSE:To easily measure the flow rate of grains which flow down in a drying chamber at low cost by measuring the time from the opening operation of an opening/closing valve to the detection of deposited grains by a grain sensor and detecting the flow rate of grains which flow down in a flowing-down chamber. CONSTITUTION:A solenoid 29 is put in expanding operation with the signal generated by an operation device during drying operation at specific intervals of time to close the opening/closing valve 2 in the flowing-down chamber 1, so that grains are deposited in the flowing-down chamber 1. The time from the opening of the opening/closing valve 2 to the detection of the deposition of grains by the grain sensor 3 is measured to detect the flow rate of grains and the flow rate is compared with a set grain flow rate; and the rotating speed of a variable speed motor which drives a discharge valve is so controlled that the difference becomes zero, and the solenoid 29 is put in contracting operation to control the opening/closing valve 2 into an open state and thus making the grains flow down in a flowing-down chamber 1, thereby drying the grains.

Description

[Detailed description of the invention] Industrial applications This invention relates to a grain flow rate detection device.

It can be used for rice hullers, dryers, etc.

2. Description of the Related Art In the past, for example, a huller or a dryer did not have a grain flow rate detection device for easily detecting the flow rate of grains.

Problems to be Solved by the Invention For example, in a grain dryer that does not have a giS flow rate detection device, grains are fed out from the drying chamber of the dryer by rotation of a valve, and a cycle of flowing down is repeated while the burner is being fed out. The hot air generated from the drying chamber is passed through the drying chamber, and the grains flowing down the drying chamber are exposed to the hot air and dried.
The amount of grain fed out by the feeding valve is reduced, and the amount of grain fed out and flowing down the drying chamber becomes small, so that the time for this grain to flow down in the drying chamber becomes longer. As a result, this grain is exposed to hot air for a longer period of time than the predetermined time, and as a result, the drying loss of this grain increases as it is exposed to hot air in one cycle, resulting in the formation of shell side in the grain. Therefore, the grain flow rate was detected and the rotation speed of the feeding valve was controlled based on the flow rate detection result to maintain a constant grain flow rate. be.

This invention is a means to solve the problem! An on-off valve (1) that allows the grains to flow down or be deposited by opening and closing operations into the downstream chamber (1) that allows the grains to flow down 212 m.
2) and a grain sensor (3) for detecting the accumulated grains.
) depending on the time it takes for the sedimentary grains to be detected in the downstream chamber (
1) A grain flow rate detection device configured to detect the flow rate of grains flowing down.

Effect of the Invention For example, when a grain dryer is equipped with a grain flow rate detection device that detects the flow rate of grains, a circulation is performed in which the grains are fed out from the drying chamber of the dryer by rotation of a valve. Repeatedly, the hot air generated from the burner passes through the drying chamber, and the grains flowing down the drying chamber are exposed to the hot air and dried.

During this drying operation, the grains being dried are repeatedly circulated through the downstream chamber (1) and supplied downstream to the drying chamber. The lower part is closed by the closing operation of the on-off valve (2), and this flow chamber +11
The grain sensor (3) detects the deposited grains inside the opening/closing valve (2).
The time from the closing operation of the chamber until the grain sensor (3) detects the deposited grains is detected, and from this detection time the flow chamber (
1) The flow rate of grains flowing down is detected, and if this detected grain flow rate is smaller than a predetermined grain flow rate, the rotation speed of the feeding valve is controlled to a high rotation speed, and vice versa. If the amount is too large, the rotational speed of the delivery valve is controlled to a low speed so that the detected grain flow rate is not controlled to be equal to the predetermined grain flow rate, so that the grains are dried.

Effects of the Invention According to the present invention, the flow rate of grains flowing down in the downstream chamber (1) is detected by the on-off valve (2) and the grain sensor (31) provided in the downstream chamber (1), and the detected grains are detected by the grain sensor (31). Since the rotation speed of the feeding valve that controls the grain flow rate can be controlled by the grain flow rate, the grain flow rate flowing down the drying chamber can always be controlled to a predetermined amount. This will no longer occur, the quality of the grain will not deteriorate, and the grain flow rate can be reduced simply by providing the on-off valve (2) and the grain sensor (3) in the downstream chamber (1). By being able to detect the grain flow rate, a simple and inexpensive grain flow rate detection device can be realized.

Embodiment Note that the rotation will be described with respect to a state in which a grain flow rate detection device is attached to the grain dryer (4).

The machine wall (5) of the dryer (4) has a rectangular shape that is long in the front and back direction, and a storage chamber (6) is formed in the lower part of the machine wall (5),
A drying chamber (7) is arranged below the storage chamber (6) in parallel and communicated with it.

At the bottom of each drying chamber (7), a feed valve (8) for feeding and flowing grains is rotatably supported.
) On the lower side, a grain collection gutter (9) with a rotatably supported transfer spiral is provided and communicated with each drying chamber (7).
) A hot air chamber (II) is formed between the inner sides, and each of these drying chambers (
7) It has a configuration in which a ventilation chamber +10 is formed on the outside.

The front machine wall (5) is equipped with a burner case (1 compartment) containing a burner (+25) and an operating device (capacitor) for starting and stopping the dryer (4). is configured to draw fuel from the fuel tank (daytime) into the burner (Iδ) by opening and closing the fuel valve and supplying it to the burner (Iδ). The blower (11) is rotated at l to supply combustion air to the burner port δ, and the rear machine wall (5) is equipped with a folding screen (to) and a motor (211).
and a variable speed motor Q3, this motor (211 rotationally drives the folding screen machine (to)), and the variable speed motor (25 rotationally drives the transfer spiral and the delivery valves (8), (8) at variable speeds. The hot air generated from the burner (121) is passed from the hot air chamber +111 to the drying chamber (7), passes through the exhaust chamber (10), and is sucked and exhausted by the folding screen (to).

A two-layer transfer gutter equipped with a ceiling plate (end) and a transfer spiral is provided on the upper side of the storage chamber (6), and the central part of this transfer gutter C4 is used for supplying grains to be transferred into the storage chamber (6). A port is provided, and a diffusion plate is provided below the supply port.

The grain raising machine (to) is installed in the front part of the front machine wall (5), and inside the bucket conveyor (5) belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter Q4. A dispensing tube (2) and a rectangular flow chamber (1) are provided and communicated with each other,
An on-off valve (2) is pivotally supported in the lower part of this downstream chamber (1) so as to be freely openable and closable, and a solenoid haze is operated to extend in response to a tU internal signal transmitted at predetermined time intervals from the operating device (+9). , the opening/closing valve (2) is closed by the extension of this solenoid (to), and this closing operation opens the downstream chamber (1).
A grain sensor (3) is provided above the on-off valve (2) to detect grains deposited in the downstream chamber (1). This grain sensor (3) is composed of a light emitting element provided on one wall of the downstream chamber (1) and a light receiving element provided on the other side wall, and detects the light emitted from the light emitting element. If the light receiving element does not receive light within a predetermined time, it is configured to detect that grains have accumulated up to the position of the grain sensor (3) in the downstream chamber (1), and in conjunction with the second detection, the solenoid (To) is contracted, and this solenoid (To) is contracted to open the on-off valve (2), and this opening operation causes the flow chamber (1) to open.
The grains flow down inside the dryer (4) depending on the time from the closing operation of the on-off valve (2) to the detection of accumulated grains by the grain sensor (3). 8)
The structure is such that the flow rate of the grains fed out and circulated is detected, and a supply gutter (
A motor 0υ is installed on the top of the grain hoist (to), and this motor OD connects the packet conveyor (5) belt, the transfer spiral in the transfer gutter Q1, and the It has a configuration that rotates between the diffusion plates, etc., and there is a moisture sensor (1) in the center vertically to detect grain moisture.
4].

The operating device (+9 is box-shaped, and on the surface plate of this box there are each start switch (to) for starting the dryer (4) for each task, a stop switch (to) for stopping the dryer (4), and the burner 0δ Each setting sets the temperature of the hot air generated from (
(to), a display window f121 that alternately displays the setting value (to) for setting the finishing target moisture content, and the detected value detected by the moisture sensor (0 phrase) and the hot air temperature sensor (to). This is a configuration in which a control device and a rotation control device (to) are provided.

The rotation control device (to) includes an input circuit (to) into which the extension operation of the solenoid (to) and grain detection by the grain sensor (3) are input, and various inputs from this input circuit (to). A CPU that performs arithmetic and logical operations, comparison operations, etc. on input.
NI, it is configured with an output circuit 6o that receives and outputs various commands from this CPU (g), and when the extension operation of the solenoid (to) is input to the CP014G, it is counted by this CPU-. is started, and when the grain detection of the grain sensor +3) is input to the CPUm, counting is stopped, and the grain flow rate is calculated based on the count value counted by this CPUNI, and this calculated grain flow rate and the CPUm The CPU (a) compares the set grain flow rate set and stored in (2), and if there is a difference, the feed valve (8) is rotated so as to be the same as the set grain flow rate. The configuration is such that the variable speed motor (23) is controlled to rotate at high speed or low speed, and at the same time, the solenoid (to) is operated to reduce the speed.

The control device (to) is configured to control the start and stop of the dryer (4), control the temperature of hot air, and the like.

The dryer (4) and the moisture sensor (b) can be activated by operating the operating device (each setting of So9) to the specified position and operating the start switch (to) to start drying. The burner [125] is started, and hot air is generated from the burner 021, which passes through the hot air chamber (In) to the drying chamber (7), passes through the haiku chamber (11), passes through the exhaust fan (to), and is sucked and exhausted. The g; The grains are fed into the grain collection gutter (9) and are fed into the grain collection gutter (9).
The grains are transferred from the feeder via the supply trough (to) into the grain hoist (to) by the transport spiral at the bottom, are conveyed to the upper part by the packet conveyor (5) belt, and are passed through the dispensing tube (to) and the flow chamber (1). Then, it is supplied into the 9th layer of the transfer gutter, and from this transfer gutter (c), it is supplied to the upper part of the diffusion plate by the upper transfer spiral, and is circulated and dried to achieve the finish set by the moisture sensor 04 by operating the setting hunting country. When the grain moisture content that is the same as the target moisture content is detected, the dryer (5) is automatically stopped under automatic control by the control device (equipment) of the operating device (4).

During this drying work, the solenoid is extended and the on-off valve (2) in the downstream chamber (1) is controlled to the closed state by a signal transmitted from the operating device C at predetermined time intervals. , i grains are deposited in this downstream chamber (1), these deposited grains are detected by a grain sensor (3), and the time from the closed state of this on-off valve (21 to the detection by the grain sensor (3)) The grain flow rate is detected, and the detected grain flow rate and the set grain flow rate are compared, and if they are different, the feeding valve (8) is driven to rotate so that the grain flow rate becomes the same as the set grain flow rate. The rotation speed of the variable speed motor ■ is controlled by the rotation control device (to) to high speed rotation or low speed rotation, and at the same time, this rotation control device (to)
Then, the solenoid is contracted and the on-off valve (2) is controlled to be open, and the grains flow down into the flow chamber (1) and are dried.

Good grain drying is achieved by controlling the flow rate of grains fed down by the feed valve (8) and circulated within the dryer (4) to a constant flow rate.

In addition, the grain flow rate detection device is used in the finished rice discharge device of the huller to detect the grain flow rate of the finished rice discharged, and the hulling efficiency is calculated from this detected grain flow rate. 1 is a block diagram, FIG. 2 is a flowchart, FIG. 3 is a partially enlarged side view, and FIG. 4 is an overall side view of the dryer partially cut away. , Figure 5 is A- in Figure 4.
A sectional view, FIG. 6 is a rear view of a part of the dryer, and FIG. 7 is an enlarged front view of a part of the dryer.

In the figure, symbol (1) indicates a flow chamber, (2) indicates an on-off valve, and (3) indicates a grain sensor.

Claims (1)

[Claims] A flow chamber (1) in which grains flow down is provided with an on-off valve (2) that allows the grains to flow down or be deposited by opening and closing operations, and a grain sensor (3) that detects the deposited grains. 2
) A grain flow rate detection device that detects the flow rate of grains flowing down in the flow chamber (1) according to the time from the closing operation of the grain sensor (3) until the grain sensor (3) detects the accumulated grains.