JPS60115B2 - Grain scattering prevention device for color sorter - Google Patents

Description

[Detailed description of the invention] The present invention relates to a grain scattering prevention device for a color sorter.

In general, in the photoelectric sorting device of a color sorter, dust adhering to sorted particles diffuses into the room due to the blast action of the spray nozzle device and scatters onto each transparent surface of the light source and light receiving element of the photoelectric detection device. The amount of light emitted from the light source of the photoelectric detection device is attenuated due to dust adhesion or adhesion, or scattering of sorted particles that intermittently blocks the transmitted or reflected light received by the light receiving element. The detection sensitivity of the light-receiving element becomes poor, and the sorting action eventually malfunctions, degrading the sorting performance.

In order to solve the above-mentioned drawbacks, the present invention installs a grain scattering prevention partition wall of a unique structure near the injection nozzle device of the photoelectric sorting device, and divides the room into a light detection section and an injection sorting section by the partition wall. At the same time, by providing an exhaust window and connecting the window to the exhaust device, the light detection section is separated from the spray sorting section by the partition wall, and the scattered dust generated by the wind sorting action is removed from the frame of the spray sorting section. Dust from the injection sorting unit enters the light detection unit by being collected and removed through the ventilation window installed in the wall, and by the wind flowing from the high-pressure upper chamber to the low-pressure lower chamber generated at the grain passage window installed in the partition wall. In addition to preventing this, the interior of the light detection unit can be kept clean at all times by eliminating small amounts of dust generated in the light detection area, thereby maintaining a constant amount of light emitted from the light source, and The object of the present invention is to develop and provide a device that maintains the detection sensitivity of the light-receiving element normally and always reliably performs a highly accurate sorting action.

Embodiments of the present invention will be described with reference to illustrative figures.

1 and 2, reference numeral 1 in the figures is a sorting machine frame, and a vibrating grain feeder 3 with a vibrating device 2 is installed on the upper part of the machine frame 1, and a joint hopper 4 is installed on the supply side. At the same time, a downflow gutter 5 connected to the discharge side in a dogleg shape is installed to form a grain flow path, and a photoelectric device equipped with a reference color plate 6 is installed at the lower end of the flowdown gutter 5. A photoelectric sorting device 7 consisting of a layer and a spray nozzle device is connected, and a photoelectric layer consisting of a light source 8 and a light receiving element 9 is made to face the falling locus A of particles mixed with different color particles flowing out from the downflow gutter 5, and is provided near the same. The injection nozzle 10 of the injection nozzle device is fixed so as to face the trajectory A,
The photoelectric layer and the injection nozzle device are electrically connected via a control circuit 11, and a different color particle discharge port 12 is provided at the bottom of the photoelectric sorting device 7, and a particle size adjustment port is provided on the extension line of the trajectory A. It is formed so that a grain collection cylinder 13 is inserted to collect the grains and take them out of the machine. Next, in the grain scattering prevention device of the present invention, a grain scattering prevention partition wall 16 made of a flat plate body 15 having a passage window 14 for grains flowing down the flow trajectory A is provided on the injection nozzle device. It is mounted near the upper part of the injection port 17 of the injection nozzle 10, and the upper part of the partition wall 16 is used as the light beam detection part 18, and the upper part of the partition wall 16 is used as the light detection part 18, and the partition wall 16
The lower part is divided into a spray sorting section 19, and the two frame walls of the spray sorting section 19 are provided with a wind exhaust window 21, which is connected to a 9E wind device 22 via a wind pipe 23.

24 is a ventilation wall provided at the ventilation window 21, and 25 is a residual particle discharge port provided at a lower portion of the partition wall 16.

In addition, in another embodiment shown in FIG. 3, a partition wall 16' for preventing grain scattering is provided, which is an umbrella-shaped plate 26 having a passage window 14' for grains flowing down the flow path A in the center thereof. A bag is mounted near the upper part of the injection port 17 of the injection nozzle 10 provided in the injection nozzle device, and the upper part of the partition wall 16' is divided into a light beam detection part 18', and the lower part of the partition wall 16' is divided into an injection sorting part 19'. A ventilation window 21 is installed in the frame wall 20' of the injection sorting section 19'.
' is provided to connect said 21' to an air exhaust device.

With the above-mentioned configuration, the mixed particles of different colors of the raw material flowing down from the supply hopper 4 to the vibrating grain feeder 3 are separated by being ejected from the flow trajectory A by the jet action of the injection nozzle 10 and are sorted out. Ru. At that time, as mentioned above, this blast action diffuses the dust adhering to the sorted particles to the surroundings, contaminating each light-transmitting surface of the photoelectric detection device, and also scatters the sorted particles around, causing photoelectric detection. Although the light beams received by the device are blocked, the light beam detection section 18 or 18', where the damage occurs, is separated by the grain scattering prevention partition wall 16 or 16' and has a substantially open/closed shape. 19 or 1
Sorting grains and dust that would be diffused or scattered upward from 9' are completely prevented from entering the light beam detection section 18 or 18', and the frame wall 20 or 10 of the injection sorting section is completely prevented.
Scattered dust inside the spray sorting section 19 or 19' is absorbed and removed by the suction force from the artificial wind window 21 or 21' provided in the spray sorting section 19 or 19'. Since the pressure is kept higher than 19', it prevents dust from the spray sorting section from entering the light detection section, and also eliminates small amounts of dust generated within the light detection area, keeping the interior of the light detection section clean at all times. This allows the light intensity of the light emitted from the light source to be maintained constant, the detection sensitivity of the light receiving element to be maintained normally, and a high-precision sorting effect to be achieved at all times. This has the effect of greatly improving sorting performance by eliminating grains, and making it possible to reliably and smoothly mass-produce high-quality selected grains.

[Brief explanation of drawings]

The drawings are examples of the invention. FIG. 1 is a side sectional view of the present device, FIG. 2 is an enlarged sectional view of the photoelectric sorting device, and FIG. 3 is a sectional view of another embodiment of the photoelectric sorting device. DESCRIPTION OF SYMBOLS 1... Sorting machine frame, 2... Vibrating device, 3... Vibrating grain feeder, 4... Supply hopper, 5... Downflow gutter, 6
... Reference color plate, 7... Photoelectric sorting device, 8... Light source, 9... Light receiving element, 10... Spray nozzle, 11...
・Control circuit, 12... Discharge port for different colored grains, 13...
Grain collection cylinder for grading, 14, 14'... passing window, 15...
Flat body, 16, 16'... Partition wall for preventing grain scattering, 17
...Injection port, 18, 18'...Light detection section, 19,
19'... Irradiation selection section, 20, 20'... Frame wall, 2
1, 21'...8E wind window, 22...9E wind device, 2
3... Wind pipe, 24... Ventilation wall, 25... Residue discharge port, 26... Umbrella-shaped disk body, A... Downward trajectory. Figure 1 Figure 2' Figure 3

Claims (1)

[Claims] 1. A sorting device in which particles mixed in different colors are allowed to flow down from a flow path to a grain collecting tube, and a photoelectric detection device consisting of a light source and a light receiving element is provided around the flow path, and an injection nozzle device that is operated in communication with the light receiving device. A grain scattering prevention bulkhead having a grain passage window is installed between the photoelectric detection device and the injection port of the injection nozzle device, and the upper part thereof is used as a light beam detection section,
A grain scattering prevention device for a color sorter, characterized in that a spray sorting section is formed at the lower part of the spray sorting section, and an exhaust window is provided in the frame wall of the spray sorting section, and the window is connected to an air exhaust device.