JPS6325824B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an automatic control device for a grain sorting machine.

In general, the raw material grains supplied to the sorting plate surface of a grain sorting machine vary depending on the grain distribution state on the sorting plate surface ( The fluidized bed of grains flowing down from the supply hopper to the sorting plate fluctuates in height relative to the standard bed height, so that the grains discharged from the grain discharge gutter of the sorting plate are Alternatively, the sorting effect of the earth and sand particles discharged from the earth and sand particle discharge trough was deteriorated.

Japanese Unexamined Patent Publication No. 52-34255 is known as an example of a technique for dealing with the above problems, which
A shaft with an actuating body on the top surface of the sorting plate is made to protrude outside the mounting frame, and switches are placed on both the left and right sides of the swinging arm provided at the end of the shaft on one side, and both switches are connected in relation to the motor. With this configuration, when the pressing action of the actuating body is too strong or too weak due to the pressing of the grain flowing on the sorting plate surface, the swinging arm presses one of the left and right switches, and the switch is activated. The data is activated by the signal, and the inclination angle of the sorting plate is automatically adjusted to the appropriate grain distribution state by the motor.

Furthermore, Japanese Patent Laid-Open No. 52-50870 discloses a configuration in which the diameter of a split pulley that rotates a wind turbine is adjusted to a large or small diameter by a motor activated by a push signal from the above-mentioned left and right switches. If the pressing force of the actuating body that presses the grains flowing on the sorting plate surface is too strong or weak, the wind turbine blowing on the sorting plate automatically adjusts the strength of the wind to lower or lower the strength of the grains on the sorting plate surface. This is intended to ensure proper sorting action.

By the way, in both the former and latter configurations, there is a certain tolerance range for the actuating body to contact the grain and act on the switch. The sorting action is automatically carried out depending on the distribution state, but the sorting plate is configured so that its area is reduced toward the stone discharge section to prevent foreign substances such as stones that are concentrated at the inclined upper end of the sorting plate. Therefore, even if the distribution of grains on the sorting board surface is adjusted within a predetermined distribution range by the actuator, the raw material grains supplied will have different varieties, regions of origin, grain shapes, and
There are differences in various flow effects such as the degree of slippage and moisture content, and the amount of variation in the height of the grain layer mixed in the stones, etc., where the grain flows toward the stone discharge section is extremely large compared to the operating body. Since the grain layer is not a constant layer, re-sorting of stones, etc. in the concentrated grain layer by wind separation at the stone discharge section is uncertain, and when the grain layer is raised, the effect of aeration into the grain layer is Grain is becoming more and more high-rise, reducing the accuracy of sorting stones, etc., increasing the amount of grain mixed in with foreign substances such as stones discharged outside the machine, and conversely, increasing the amount of grain flowing toward the stone discharge section. When the height of the layer is low, the effect of aeration into the grain layer becomes excessive, and even foreign substances such as stones that have been concentrated and transported are blown away from the stone discharge section toward the sorting plate, and the grain discharge port This is a cause of a decrease in the sorting accuracy of the grains discharged from the machine, and there is a need for further improvement.

The first invention of the present application is aimed at improving the above-mentioned problems, and includes providing a grain discharge port on the rear swinging side of the porous wall sorting plate, and extending a dirt particle discharge gutter to the front swinging side on the opposite side. The photoelectric device has a configuration in which a photoelectric device consisting of a light source and a light receiving element installed in the soil particle discharge gutter is electrically connected to an angle adjustment mechanism that adjusts the inclination angle of the sorting plate attached to the sorting frame. When the height of the fluidized bed flowing into the sediment discharge gutter is not the predetermined bed height, the angle adjustment mechanism is activated by the detection signal of the photoelectric device, and the inclination angle of the sorting plate is changed to high or low. An object of the present invention is to provide an automatic control device for a grain sorting machine that can constantly and stably operate the grain sorting function by automatically controlling the height of the fluidized bed flowing into the grain so that the fluidized bed height is a predetermined bed height using a photoelectric device. .

In addition, the second invention of the present application has a configuration in which a photoelectric device provided in the dirt particle discharge gutter and an air volume adjustment mechanism that adjusts the ventilation amount of the sorting plate are electrically connected, so that the dirt particles flow into the dirt particle discharge gutter. When the photoelectric device detects that the height of the fluidized bed differs from the predetermined level, the photoelectric device's detection signal is sent to the air volume adjustment mechanism, which controls the amount of air passing through the grains on the sorting plate to increase or decrease. Another object of the present invention is to provide an automatic control device for a grain sorting machine that can constantly and stably automatically control the height of the fluidized bed flowing into the earth and sand particle discharge gutter detected by a photoelectric device to a predetermined bed height.

An embodiment of the first invention of the present application will be described below based on FIGS. 1 and 2.

A sorting frame 4 is suspended by support rods 5, 5 inside a box frame 2 with a supply hopper 1 installed on the upper part, and is tilted so as to be movable back and forth, and the porous wall sorting plate attached to the sorting frame 4 is swung backward A grain discharge port 9 is provided on one side, and a dirt grain discharge gutter 8 is extended and fixed to the sorting plate 3 on the opposite front swinging side. A windmill box 11 containing a built-in windmill 10 for ventilation through the perforated wall of the sorting plate 3 is arranged at the bottom of the sorting frame 4. A flow rate adjustment mechanism 23 consisting of a flow rate adjustment valve 21 and a screw shaft 22 is installed on the side wall of the supply hopper 1 and connected to an automatic adjustment control section 24, and the automatic adjustment control section 24 is a drive device equipped with a forward and reverse rotation electric motor M. It is connected to 25. Rotating shaft 1 placed horizontally on sorting frame 4
5 supports the front part of the porous wall sorting plate 3, and the rear part of the sorting plate 3 is engaged with an angle adjustment mechanism 17 consisting of a screw shaft 16, and the angle adjustment mechanism 17 is electrically connected to the automatic adjustment control part 24. It is connected to.

A light source 32A and a light receiving element 3 are installed in the dirt particle discharge gutter 8.
An upper photoelectric device 26 consisting of 3A and a lower photoelectric device 27 consisting of a light source 32B and a light receiving element 33B are arranged at an arbitrary interval A, and both photoelectric devices 26, 27
is electrically connected to the drive device 24 via a control circuit 28. A translucent surface 31 through which the grains flow is provided on one side of the container frame of the photoelectric devices 26 and 27, and reference numeral 6 is a sensor installed on the front swinging side of the sorting plate 3, and reference numeral 7 is a sensor installed on the front swinging side of the sorting plate 3. , is an on-off valve that is opened and closed by a sensor 6 that detects dirt particles.

Note that the light sources 32A and 32B are electric lights (incandescent lamps, arc lamps, fluorescent lights, etc.) or light emitting diodes, and the light receiving elements 33A and 33B are photoelectric conversion elements, such as photovoltaic elements (selenium photocells, silicon solar cells, etc.). , photodiodes, phototransistors, etc.), photoelectron emitting devices (phototubes, photomultiplier tubes, television camera tubes, image tubes, etc.), etc.

Next, the control circuit 28 provided in the automatic adjustment control section 24 will be explained with reference to FIG.

An upper photoelectric device 26 consisting of a light source 32A and a light receiving element 33A is connected to one side of the input side of the comparison amplifier 34, and a variable resistor 36 with an upper limit value of the layer height is connected to the other side of the input side of the comparison amplifier 34. The output side of the comparison amplifier 34 is connected to the drive device 2 via the relay 29.
It is connected to the forward/reverse rotating electric conductor M of No. 5. Further, a photoelectric device 27 consisting of a light source 32B and a light receiving element 33B, and a variable resistor 37 in which a lower limit value of layer height is set are respectively connected to the input side of a comparator amplifier 35, and the output side of the comparator amplifier 35 is connected via a relay 30. The electric motor M has been contacted.

The operation of the above configuration will be explained below.
A mixture of soil grains and grains with different varieties, production areas, grain shapes, degree of skin deviation, water content, etc. is supplied from a supply hopper 1 to a porous wall sorting plate 3, where the sorting plate 3 moves vertically and reciprocally. The grains with a low specific gravity are sorted by the wind turbine 10 by a blowing air blow to the mixed grains on the surface of the sorting plate 3, and the grains with low specific gravity float down on the surface of the sorting plate 3 and reach the grain outlet 9. and is taken out of the aircraft. Then, due to the vertical and reciprocating movement of the sorting plate 3 and the blast action, the large specific gravity soil particles that have settled on the surface of the sorting plate 3 are transferred toward the shaking side of the sorting plate 3 and concentrated, and then the sediment particles are discharged. The grains mixed in with the soil particles transferred to the gutter 8 and concentrated are separated by the sorting plate 3 by the wind blowing from the holes in the plate surface of the soil particle discharging gutter 8.
The sensor 6 that detects the dirt particles opens the on-off valve 7, and the dirt particles are discharged from the dirt discharge gutter 8.

During the above-mentioned sorting action, the grains mixed with earth and sand particles supplied from the supply hopper 1 to the porous wall sorting plate 3 are divided into grains mixed with soil and sand grains due to the above-mentioned differences in variety, production area, grain shape, degree of skin deviation, moisture content, etc. When the fluidized bed of grains mixed into the concentrated sediment particles flowing into the sediment particle discharge gutter 8 changes and the fluidized bed becomes higher than a predetermined standard layer height, the sediment particles in the sediment particle discharge gutter 8 change. In addition to deteriorating the sorting effect, the distribution state (layer height) of the grains on the porous wall sorting plate 3 is increased to reduce the blowing force on the grains by the windmill 10, thereby degrading the grain sorting effect.
On the other hand, if the fluidized bed flowing into the sediment discharge gutter 8 becomes lower than the predetermined standard bed height, the sediment grains and grains become confused in the sediment particle discharge gutter 8, worsening the sediment particle sorting effect, and , the distribution of grains on the three surfaces of the porous wall sorting plate becomes diluted, causing blowhole spots and deteriorating the grain sorting effect.

Therefore, in the first aspect of the present invention, the upper photoelectric device 26 and the lower photoelectric device 27 are arranged at an arbitrary interval in the earth and sand particle discharge gutter 8, and both the photoelectric devices 26, 2
7 and the angle adjustment mechanism 17 are electrically connected to the automatic adjustment control section 24 via the control circuit 28, grains etc. mixed into the concentrated soil particles flowing in the soil particle discharge gutter 8 are removed. For the fluidized bed, light source 3
The light receiving element 33A or the light receiving element 33B receives the reflected light beam from the light source 2A or the light source 32B, and inputs the potential generated by each of the light receiving elements to the comparison amplifier 34 or the comparison amplifier 35. Sediment particle discharge gutter 8
The comparator amplifier 34 compares the input value of the upper photoelectric device 26, which detects that the fluidized bed flowing into the interior has become higher than a predetermined reference bed height, with the upper limit value of the bed height set in the variable resistor 36. The output signal is communicated to the automatic adjustment control unit 24 via the relay 29, and the lower photoelectric device 27 detects that the fluidized bed flowing into the sediment particle discharge gutter 8 has become lower than a predetermined standard bed height. The comparator amplifier 34 compares the input value with the lower limit value of the layer height set in the variable resistor 35, and the output signal is communicated to the automatic adjustment control section 24 via the relay 30. 2
4 to the angle adjustment mechanism 17,
By rotating the angle adjustment mechanism 17 forward or backward and rotating the screw shaft 16 to gradually or steeply adjust the inclination angle of the sorting plate 3, the fluidized bed flowing into the earth and sand particle discharge gutter 8 is kept within a predetermined interval A. When the standard layer height reaches , the adjustment operation of the electric device 25 is automatically stopped, so that the fluidized bed flowing into the sediment particle discharge gutter 8 is automatically formed at the predetermined standard layer height, and the fluidized bed flowing into the sediment particle discharge gutter 8 is automatically formed at the predetermined standard layer height, The grain distribution of the grains returns to the normal state, the grain sorting effect on the grain sorting plate 3 is maintained well, and the grains are carefully selected to be free from any foreign particles such as dirt and sand grains, and then the grains are discharged from the grain discharge port 9. The soil grain sorting action of the grains mixed with the grains discharged and transferred into the soil grain discharge gutter 8 can greatly improve the sorting accuracy and also achieve automation of grain supply flow rate adjustment.

Note that the upper photoelectric device 26 and the lower photoelectric device 27
As shown in FIG. 2, when installed on the bottom wall surface and side wall surface of the earth and sand grain discharge gutter 8, dust is scattered by the blast from the through holes in the plate surface of the earth and sand grain discharge gutter 8, and the light sources 32A, 32B and light receiving elements 33A, 33
If each transparent surface 31 of B is contaminated, the sediment particles flowing in the soil particle discharge gutter 8 will come into contact with and clean the transparent surface 31, so that the reflected light from the grains in the fluidized bed will be removed. The detection accuracy is improved, the sorting action in the soil particle discharge gutter 8 and on the porous wall sorting plate 3 is made more accurate, and there is an effect that the sorting performance of each of the soil particles and grains can be enhanced.

Further, the upper photoelectric device 26 and the lower photoelectric device 27 may be installed so as to be adjustable in the vertical direction, or may be formed so that a predetermined reference layer height is detected by a single photoelectric device.

Next, an embodiment of the second invention of the present application will be described. Opening 38 opened in the side wall of the windmill box 11
The air volume adjustment valve 12 and the rotating rod 13 are attached to the air volume adjustment mechanism 14, and the air volume adjustment mechanism 14 is electrically connected to the automatic adjustment control section 24. A photoelectric device 27 is connected. The other configurations are the same as those of the previous embodiment, and will therefore be omitted.

The feature of the operation in this embodiment is that the air volume adjustment mechanism 14 is controlled by the output signal of the automatic adjustment control section 24 which communicates the detection signals of the upper and lower photoelectric devices 26 and 27.
The air volume control valve 12 is opened and closed, and the air volume of the wind turbine box 11 is adjusted by changing the opening degree of the air volume control valve 12 to increase or decrease the amount of air blown to the fluidized grains on the 3 sides of the sorting plate. The fluidized bed flowing into the earth and sand particle discharge gutter 8 is maintained at a predetermined standard layer height by controlling the increase/decrease of the grain flow rate of the
This has the effect of improving the sorting accuracy of the sorting plate 3 and automating the adjustment of the amount of air flowing through the porous wall of the sorting plate 3.

Next, another embodiment of the air volume adjustment mechanism will be described. A rotating shaft 18 equipped with a wind turbine 10 and a speed change pulley 1
The air volume adjustment mechanism 38 is electrically connected to the automatic adjustment control section 24 by the speed change adjustment mechanism 20 consisting of 9. The other configurations are the same as those of the previous embodiment, and will therefore be omitted.

The feature of the operation in this embodiment is that the speed change adjustment mechanism 20
The variable speed pulley 19 is rotated at variable speeds, and the rotational speed of the rotary shaft 18 is increased or decreased to adjust the amount of blowing air from the windmill 10 that ventilates the porous walls of the sorting plate 3, thereby controlling the flow of grains on the surface of the sorting plate 3. The fluidized bed flowing into the sediment discharge gutter 8 is maintained at a predetermined standard bed height by increasing or decreasing the speed, and the sorting accuracy of the sorting plate 3 and the sediment particle discharge gutter 8 is improved. This has the effect of achieving automation of air volume adjustment.

As described above, the first invention of the present application uses a photoelectric device to detect the fluidized bed that fluctuates in height with respect to a predetermined standard bed height of the fluidized bed flowing into the earth and sand particle discharge gutter, and based on the detected value. By adjusting the inclination angle of the sorting plate vertically using the angle adjustment mechanism,
The grain fluidized bed mixed in the concentrated sediment flowing into the sediment discharge gutter is automatically formed to a predetermined standard layer height, and the sorting accuracy of the porous wall sorting plate and the sediment particle discharge gutter is improved. At the same time,
This has the advantage of being able to automate the sorting action.

In addition, the second invention of the present application operates the air volume adjustment mechanism based on the detected value of the photoelectric device, and the amount of air passing through the sorting plate is controlled to increase or decrease. The grains are constantly stabilized and ventilated, improving grain sorting accuracy.

In both the first and second inventions, since the photoelectric device is installed in the soil grain discharge gutter, the variety, origin, grain shape, degree of skin deviation, moisture content, etc. of the raw material grains supplied to the sorting plate can be controlled. In contrast, the flowing grain layer flowing into the earth and sand particle discharge trough is always stabilized at a predetermined reference layer height, and highly accurate sorting can be carried out.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a side sectional view of the device, FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is an electric circuit diagram thereof. 1... Supply hopper, 2... Box frame, 3... Porous wall sorting plate, 4... Sorting frame, 5... Support rod, 6... Sensor, 7... Opening/closing valve, 8... Sediment particle discharge gutter , 9
... Grain discharge port, 10 ... Windmill, 11 ... Windmill box, 12 ... Air volume control valve, 13 ... Rotating rod, 14
... Air volume adjustment mechanism, 15 ... Rotating shaft, 16 ... Screw shaft, 17 ... Angle adjustment mechanism, 18 ... Rotating shaft, 1
9... Speed change pulley, 20... Speed change adjustment mechanism, 21
...flow control valve, 22 ... screw shaft, 23 ... flow control mechanism, 24 ... automatic adjustment control section, 25 ... drive device, 26 ... upper photoelectric device, 27 ... lower photoelectric device, 28 ... Control circuit, 29, 30...Relay, 31...Translucent surface, 32A, 32B...Light source,
33A, 33B... Light receiving element, 34, 35... Comparison amplifier, 36, 37... Variable resistor, 38...
Opening, 39... Air volume adjustment mechanism, M... Forward/reverse rotating electric motor, A... Interval.

Claims (1)

[Scope of Claims] 1. A sorting frame is tilted so as to be vertically movable inside a box frame provided with a supply hopper on the upper part, and grains are discharged on the rear swinging side of a porous wall sorting plate attached to the sorting frame. In a grain sorting machine in which an outlet is provided, a dirt particle discharge gutter is extended and fixed on the opposite front swinging side, and a windmill box containing a built-in windmill for ventilation through the perforated wall of the sorting plate is disposed at the bottom of the sorting frame. , characterized in that a photoelectric device including a light source and a light receiving element provided in the soil particle discharge gutter is electrically connected to an angle adjustment mechanism for adjusting the inclination angle of the sorting plate attached to the sorting frame. Automatic control device for grain sorting machine. 2. A sorting frame is tilted so as to be vertically movable inside a box frame provided with a supply hopper on the upper part, and a grain discharge port is provided on the rear swinging side of the porous wall sorting plate attached to the sorting frame, and In a grain sorting machine in which a sand particle discharge gutter is extended and fixed to the front swinging side of the side, and a windmill box containing a built-in windmill that ventilates through the perforated wall of the sorting plate is disposed at the lower part of the sorting frame, the soil particle discharge gutter An automatic control device for a grain sorting machine, characterized in that a photoelectric device comprising a light source and a light-receiving element is provided inside the grain sorting machine, and the light source device is electrically connected to an air volume adjustment mechanism that adjusts the amount of air passing through the sorting plate. . 3. The automatic control device for a grain sorting machine according to claim 2, wherein the air volume adjustment mechanism is formed by providing an air volume adjustment valve in an opening provided in the wind turbine box so as to be openable and closable. 4. The automatic control device for a grain sorting machine as set forth in claim 2, wherein the air volume adjustment mechanism is formed by a speed change adjustment mechanism in which a speed change pulley is provided on the rotating shaft of the wind turbine.