JPS6033558B2 - Dust removal device for color sorter - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dust removal device for a color sorter.

The photoelectric sorting room of the color sorter is almost hermetically defined.Each grain scale □ is installed at the bottom of the machine wall, and an on-off valve is installed on each scale to improve the airtightness inside the machine wall. By providing an air supply window that supplies air and an air exhaust window that communicates with the air exhaust device, scattered dust from particles generated by the blast sorting action is efficiently and continuously removed, and light is emitted from the light source. We aim to provide a device that maintains the amount of light at a constant level, maintains the detection sensitivity of the light-receiving element at a normal and good level, consistently exhibits high-precision sorting performance, and reliably and smoothly obtains high-quality selected particles. It is something to do.

To explain the present invention with reference to an embodiment diagram, reference numeral 1 in the figure is a sorting machine frame, and a vibration device 2 is provided on the upper part of the machine frame 1, and a vibrating grain feeder 3 is provided.
A supply hopper 4 is installed on the supply side, and a downward flow gutter 5 connected in a dogleg shape is installed and fixed on the discharge side, and the lower part of the flow gutter 5 is connected to both sides of the machine wall. A light-receiving element 8 and an injection nozzle 9 are attached to each of 6 and 7, and the light-receiving element 8 and the injection nozzle 9 are connected to a substantially airtight photoelectric sorting chamber 11 in which light sources 10 and 10 are provided on the walls perpendicular to both sides 6 and 7. Gutter 5
The reflected or transmitted light obtained by emitting light from the light source 10 is detected with respect to the falling locus A of particles mixed with different colors flowing out in a linear manner, and the output is communicated to the control circuit section 13 to detect different colored particles When detected, the injection nozzle 9 is operated, and the different colored particles are separated by the blast action of the nozzle 9 and discharged from the discarded grain □ 14 for different colored particles at the bottom of the machine wall 12, and the regular particles are subjected to the dark effect. The grains are taken out from the machine through a grain collecting cylinder 15 and from a particle-sorting port 16 at the end of the cylinder.

Therefore, the dust removal device of the present invention will be explained with reference to FIG.

An air supply window 17 with a filter is provided on the side 7 of the plane landing 12 of the photoelectric sorting room 11, and a wind window 18 with a wire mesh is provided on the side 6, and an air exhaust chamber 19 is provided outside of the window 18. A tare bag layer is formed which is connected to a wind blower (not shown) outside the machine via a pseudo wind pipe 20, and the sorting chamber 1
In order to substantially open and close the grain discharging ports 14 and 16, on-off valves 21 and 22 are provided, respectively. Each on-off valve 21,
22 is biased in the closing direction by the ammunition 23 to close the closing plate 2.
4 and 25 are pivotally connected to the pseudo grain openings 14 and 16, respectively. With the above-described configuration, when the mixed particles of different colors of the raw material are put into the supply hopper 4 and the device is started, the mixed particles flowing down from the supply hopper 4 to the vibrating grain feeding trough 3 are transferred to the vibrating grain feeding trough 3. Due to the vibration effect, the liquid flows down into the downflow gutter 5, flows through the gutter, and flows out into the photoelectric sorting chamber 11 along a predetermined flow trajectory A.

In the sorting chamber 11, when the light receiving element 8 receives the reflected light beam of the different color particles, it sends a detection signal to the control circuit 13, and the output signal of the circuit section 13 activates the injection nozzle 9. The particles are separated from the flow path A, and the separated particles of different colors are accumulated in the grain threshing row 4. In addition, the uniform grains are not affected by the blowing effect of the injection nozzle 9, and the grain collecting tube 1
5 and is accumulated in the threshing row 6. When each particle group reaches an appropriate capacity, its weight presses the closing plates 24, 25, and the closing plates 24, 25 close against the force of the bombs 23, 23 in the closing direction, and each particle is discharged. be done. By the way, in this sorting process, the dust adhering to the sorted particles is diffused into the photoelectric sorting chamber 11 by the counterfeit action of the injection nozzle 9 and adheres or adheres to each transparent surface of the light source 10 and the light receiving element 8. This may reduce the amount of light emitted from the light receiving element 8 or affect the detection sensitivity of the light-receiving element 8, causing a malfunction in the sorting action and reducing the sorting performance.

Therefore, each grain threshing □ was opened on the machine wall 12 of the photoelectric sorting room 11.
14 and 16 are provided with on-off valves 21 and 22, respectively, and the openings 14 and 16 are opened and closed in a timely manner by the respective closing plates 24 and 25 to improve the airtightness of the room and to effectively apply the suction force of the tare bag layer. Fresh air flows in through the ventilation window 17 and is continuously removed from the ventilation window 18 along with the scattered dust in the room.

Therefore, the air in the photoelectric sorting chamber 11 is constantly and efficiently purified, and there is almost no adhesion or adhesion of scattered dust to each transparent surface of the light source 10 and the light receiving element 8, which reduces the amount of light emitted from the light source. is maintained constant, and the detection sensitivity of the light-receiving element is maintained normally and well, so that high-precision sorting action can be maintained continuously, and high-quality selected particles can always be obtained reliably and smoothly. It is effective.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, with FIG. 1 being a side sectional view of the device, and FIG. 2 being an enlarged sectional view of the main parts thereof. DESCRIPTION OF SYMBOLS 1... Sorting machine frame, 2... Vibration device, 3... Vibrating grain feeder, 4... Supply hopper, 5... Downflow gutter, 6... Side part, 7... Side part , 8... Light receiving element, 9... Spray nozzle, 10... Light source, 11... Photoelectric sorting chamber, 12...
...Machine wall, 13...Control circuit section, 14...Grain removal □ for different color particles, 15...Grain collection tube, 16...9E for particle adjustment
Grain □, 17...Air supply window, 18...Exhaust window, 1...
Artificial wind window, 20...8E wind pipe, 21...Opening/closing valve, 22
... Opening/closing valve, 23... Bullet machine, 24... Closure plate, 2
5... Obstruction plate, A... Downward trajectory. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. In a color sorting machine that uses a light receiving element to detect changes in the amount of light obtained by emitting light from a light source onto particles flowing down from a downflow gutter into a photoelectric sorting chamber, and separates particles of different colors using a spray nozzle. ,
A ventilation window for supplying fresh air and an exhaust window communicating with the ventilation device are provided on the sides of the machine wall that defines the photoelectric sorting room in an almost airtight manner. A dust removal device for a color sorter, characterized in that each of a grain discharging port and a grain discharging port for particle size adjustment is provided with an on-off valve. 2. The dust removal device for a color sorter according to claim 1, wherein the opening/closing valve comprises a closing plate and a bullet that biases the closing plate in the closing direction.