JPH02307537A - Foreign matter removing apparatus in grain dryer - Google Patents

Abstract

PURPOSE:To enhance sorting work efficiency by providing a judge means for judging the connection of a grain size sorting apparatus and also providing a setting means for setting the recirculation amount of unhulled rice. CONSTITUTION:A microcomputer is provided in a control box 35 and respective input signals and an input signal showing whether a grain size sorting apparatus 24 is connected are taken in the operational control part 36 of the microcomputer. The connection of the grain size sorting apparatus 24 is judged on the basis of the connection of a connector 38. At the time of foreign matter sorting treatment, the connection of the connector 38 is accompanied and, when the connector 38 is connected, signal wires C, D are connected to the signal wires (c), (d) on the side of the control box 35 and, by short-circuiting them, the operational control part 36 can judge the connection of the grain size sorting apparatus 24 and sets the rotational speed of the motor of a delivery valve to a slightly slow speed and controls the fuel supply amount to a burner corresponding to said speed to control a drying speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a foreign matter removal device in a grain dryer.

[Prior Art and Problems to be Solved by the Invention] Paddy affected by so-called rice mildew appears in dark clumps due to the collection of hyphae and chlamydospores that are densely packed on its surface. It is difficult to remove during the process, and it becomes a hindrance during the hulling process.

In other words, during the hulling process, the rice grains are crushed by the dehulling rolls and mixed into the finished brown rice, which causes a decrease in the grade of the rice.For this reason, it is necessary to remove the rice malt diseased paddy in advance. A special sorting machine is used to sort and separate the rice, but this sorting requires separate work time and reduces efficiency.

For this reason, in order to remove the rice mildew diseased paddy during any of the processes of loading, drying, and discharging the paddy in the dryer, a grain size sorting device is installed in the appropriate position of the dryer frame, and the rice grains are transferred inside the dryer. It is designed to sort and remove some of the paddy inside.

However, since it is a form in which a part of the paddy in the ring is repeatedly taken into a sorter and sorted, there is a drawback that damage occurs when passing through the sorter.

[Means to solve the problem]

The present invention attempts to solve the above-mentioned drawbacks, and provides a grain dryer having a circulation transfer device that allows the paddy stuffed into the storage tank 2 to pass through 3 drying chambers, dry it, and return it to the storage chamber again, and a A grain size sorting device 24 is provided to separate and sort out foreign matter with a diameter larger than the grain size sorting device, and a supply device supplies a part of the paddy during the transfer process by the circulation transfer device to the grain size sorting device side; A reduction device for returning the conditioning from the particle size sorting device 24 to the transfer process is provided, and a determining means is provided for determining the connection of the particle size sorting device 24, and based on the result of this determination, the circulating transfer is performed. A foreign matter removal device in a grain dryer is provided with a setting means for setting the amount of rice circulated by the device to a predetermined value or less.

[Operation and effect of the invention]

A part of the predetermined amount of rice supplied to the grain size sorting device 24 is subjected to a grain size sorting action and is separated into grain size grains and foreign substances such as rice mildew diseased rice grains.

At this time, if the determination means determines that the grain size sorting device 24 is connected to the dryer main body, the amount of paddy circulation is automatically reduced, and the number of times of processing by the grain size sorting device 24 is reduced. Even if a large number is set, the number of repetitions for circulation drying associated with this can be reduced, and damage can be reduced.

〔Example〕

An embodiment of the present invention will be briefly described with reference to the drawings.

1 is the machine frame of the grain dryer, and inside this machine frame, a storage tank 2. A drying room 3 and a grain collection room 4 are installed vertically, and a storage tank 2 is provided outside the machine frame 1 to store the grains collected on one side of the grain collection room 4.
A grain lifting machine 5 is installed to raise and return the grain. In addition, the drying room 3 is
Hot air chamber 6 leading to a burner barrel with a burner (not shown)
A grain flow passage 9.10 is formed between the grain flow passage 9.10 and a ventilation chamber 8 communicating with a fan chamber 8 having a suction fan 7. It is designed to dry the grain by blowing hot air at it every time it is measured.

The grain lifting machine 5 has a structure in which a packet belt 13 is wound around the inside thereof, and can scoop up dry grains transferred to one side by a lower transfer spiral 14 installed horizontally at the lower part of the grain collection chamber 4 and transfer them to the upper part. There is. The grains scooped up by this grain lifting machine 5 and thrown at the upper part are transported by an upper transport spiral 15 provided at 16.
is guided to the starting end side. Incidentally, the grains horizontally transferred by the transfer spiral 15 are guided to a rotating diffusion plate 17 disposed at the upper center of the storage tank 2, and are diffused and dropped into the storage tank 2. 18 is a grain loading hopper connected to the lower part of the grain lifting machine 5.

An on-off valve 20 is provided at the supply start end side of the upper transfer spiral gutter 16.
It has a discharge port 19 that can be opened by opening and closing operations, and is configured to be able to supply paddy to a grain size sorting device 24 via a guide tube 21.

The grain size sorting device E24 rotates the rice from the inlet funnel 27 which removably receives the guide tube 21 in a substantially horizontal position by a drive motor 28, and uses a rotating sorting tube 29 having a slit hole of an appropriate width formed on the outer periphery. As a result, the paddy supplied to the starting end side of the rotary sorting tube 29 leaks from the slit hole in the process of moving to the terminal end, and large-diameter paddy with rice mildew disease cannot leak out and is transferred to the terminal end. The structure is such that it is discharged outside the machine via the discharge pipe 30. Incidentally, numeral 31 denotes a guide trough serving as a reducing device for returning the processed material to the filling hopper 18.

An opening 33 is provided on the f side of the inclined guide surface 32 of the guide trough 31, and can be opened and closed as required by an on-off valve 34.

FIG. 4 shows a block diagram. control box 3
5 has a microcomputer that performs drying control, and the computer's arithmetic control unit (CPU) 36 inputs work selection switches for loading, discharging, drying, and stopping through an input circuit 37, as well as various safety inputs. The sensor input and the input information as to whether or not the particle size sorting device 24 is connected are taken into account. Whether or not the particle size sorting device 24 is connected depends on, for example, the connection of the connector 38. The connector 38 is connected to two of the four signal lines a and b from the control box 35, and is connected to signal lines A, B, and the remainder for controlling the input/output of a start/stop signal to the drive motor 28. The CPU 36 has short-circuiting signal lines C and D that can be connected to the signal lines c and d of It is a configuration that can be determined in .

Further, signals from a hot air temperature sensor, a moisture meter 40, etc. are input via the A/D converter 39.

On the other hand, through the output circuit 41, each drive motor output, combustion system output, and particle size sorting device i disposed in each part of the dryer main body are output.
Outputs of 24 drive motors 28 and outputs of a normal operation control motor 42 for operating the on-off valve 20 are output, and each operating section can be controlled.

The circulation system motor, for example, the drive motor of the delivery valve 11.12, is configured to be connected via a one-rotation speed control output circuit 43, and when the CPU 36 connects the connector 38, the signal lines C and D are short-circuited. Grain size sorter W12
When the connection of No. 4 is determined to be "present," the output valve is configured to output an output to switch the delivery valve motor to the low speed side and to decrease the burner combustion amount based on the determination result.

Explain the function of the upper side.

The paddy staked from the loading hopper 18 is transferred to the storage tank 2.
1. When performing normal drying work, the hot air temperature is determined by the setting operation of the blowing amount setting switch (not shown in Figure 1) and the detected value of the outside air temperature, and drying is started. During the drying process, the moisture content of the rice grains is detected by the can moisture meter 40 for a predetermined period of time, and when the detected moisture reaches a predetermined finished moisture value, drying is completed.

During the above-mentioned drying process, a process for removing foreign substances such as rice mold diseased paddy is started. When the drying switch for starting the drying process is turned on, the drive motor 28 of the rotary sorting cylinder 24 becomes in a driving state.
The on-off valve 20 opens the discharge port 19 by the output of the control motor 42.
"open". For this reason, [a part of the paddy in the ring is inlet funnel 2]
7 portions are stored in the guide cylinder 21, and the paddy is transferred to the rotary sorting cylinder 29.
Due to the rotation of the sorting cylinder 29, the ag moves toward the terminal end of the sorting cylinder 29, and the ag leaks through the slit hole, and since the rice mildew diseased paddy has a large diameter, it reaches the terminal end and is taken out of the machine through the discharge pipe 30 and placed in a bag. will be collected. The above-mentioned paddy is returned to the loading hopper 18 via the guide trough 31, and lifted up again by the grain lifting machine 5 together with the circulating paddy.

At this time, although the on-off valve 20 is open, most of the rice grains are subjected to the transfer action of the transfer spiral 15, so that most of the rice grains are also transferred into the storage tank 2.

When such a foreign matter treatment step is repeated, the foreign matter mixed in the rice grains are gradually removed, and the ratio approaches 100% removal rate as the number of repetitions increases.

The end of the foreign matter removal process may coincide with the end of the drying process, and in this case it depends on the operating device of the stop switch, but it may also be possible to dynamically output an end signal once a preset time has elapsed. .

When performing such a foreign matter sorting process, the connector 38 is connected, and when this is connected, the signal line C1D is connected to the signal lines c and d on the control box 35 side, and by short-circuiting these, the CPU 36 It can be determined that the large sorting device 24 is connected, and the rotational speed of the delivery valve motor is set to be slightly slower, and the amount of fuel supplied to the burner is accordingly throttled to lower the combustion amount and the drying speed is adjusted. .

As described above, in order to discharge the paddy that has been dried and removed from the machine, the discharge pipe 21 is removed from the grain size sorting device 24, set at an appropriate location, and the discharge switch is operated. The on-off valve 20 is opened, and the paddy lifted by the grain lifting machine 5 flows down the guide tube 21 and is discharged.

In the above embodiment, since the reduction guide receiver @31 is provided with an opening [133] that can be freely opened and closed, foreign matter that remains even after repeated removal processes can be taken out of the machine and collected in the bag opening. can.

In the embodiment described above, the connection of the large grain sorting device 24 was determined by the connection of the connector 38, but the structure is such that separate foreign matter processing switches are provided and the circulation system motor is switched to the low speed side by the operation of the switch. You can also use it as

In addition, in this embodiment, it is determined that the grain size sorting device 24 is connected only by connecting the connector 38, and the amount of paddy to be circulated and the amount of combustion can be further controlled. If the above-mentioned circulating paddy amount and combustion amount can be changed based on a comprehensive judgment that also takes into account the fact that the actual operating state of the grain size sorter 24 is determined by taking out the output, etc., then the grain size sorter 24 is not driven. It is even more convenient to maintain standard drying conditions.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of the whole with a partial section, Fig. 2 is a side view thereof, Fig. 3 is a front sectional view, and Fig. 4 is a block diagram. . In the figure, 16 is a transfer gutter, 19 is a discharge port, 20 is an on-off valve, 2
1 is a guide tube, 24 is a grain size sorting device, 28 is a drive motor,
29 is a rotary sorting tube, 30 is a discharge tube, 31 is a guide gutter, 3
5 is the control box. 36 is a CPU, 38 is a connector, 42 is a control motor, 4
3 indicates a rotation speed control output circuit.

Claims (1)

[Claims] (1) A grain dryer that has a circulation transfer device that allows the paddy stuffed into the storage tank 2 to pass through three drying chambers, dry it, and return it to the storage chamber again, and a In addition to providing a particle size sorting device 24 for separating and sorting foreign substances,
A supply device that supplies part of the paddy during the transfer process by the circulation transfer device to the grain size sorting device, and a grain size sorting device 24.
A reduction device for returning the sorted paddy from the above to the transfer process is provided with a determining means for determining the connection of the grain size sorting device 24, and based on the result of this determination, the paddy is circulated by the circulating transfer device. A foreign matter removal device for a grain dryer, comprising a setting means for setting the amount to a predetermined value or less.