JPS6121775A - Duster for color selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

Generally, in the photoelectric sorting room of a color sorter, the room is filled with dust, bran powder, etc. attached to the sorted particles due to the blast action from the spray nozzle device, and the light source, light receiving element, etc. of the photoelectric detection device are Scattered dust sticks or adheres to the transparent surface, which can attenuate the amount of light emitted from the light source of the photoelectric detection device, and also cause poor detection sensitivity of the light receiving element, which often causes malfunctions in the sorting action and deteriorates the sorting performance. This decreases the゛Conventionally, this type of dust removal equipment was
A cylinder with many small holes for dust suction that communicates with the 11 machines is installed upright, and an exhaust window is installed on the side of the sorting room, and a perforated wall plate is attached to the exhaust window to remove dust generated by the sorting action. A method of absorbing sugar-containing wind is known from JP-A-55-159881, but in this method, dust, small particles, etc. adhere to or get stuck in the small holes and the porous wall plate surface, causing clogging. To clean the clog, the sorting action must be interrupted and the sorting chamber must be disassembled, which takes a lot of time and effort, and the time it takes to stop the operation and the reduction in sensitivity due to dust reduces sorting efficiency. Was.

In view of the above points, the present invention provides an outlet for dissimilar particles at the bottom opening of the photoelectric sorting chamber, connects an air intake pipe connected to an air intake window provided on the side wall of the sorting chamber to an exhaust fan, and A partition plate was installed in the room to prevent foreign particles from entering the room, and the space between the partition plate and the side wall of the sorting room was formed into a wind sorting room and communicated with the ventilation window. While the wind flows in from the air intake port of the wind selection room and passes through the wind selection room, the particles of different colors that have entered the wind selection room fall under their own weight and are separated, and the dust-containing wind and small particles are exhausted from the air intake window. Since it is removed by suction by a wind fan, it completely eliminates the harmful effects of conventional devices caused by clogging of porous wall plates, etc., and also prevents poor sensitivity due to adhesion and floating of dust to the photoelectric detection device, improving its detection sensitivity. The purpose of the present invention is to develop and provide a high-performance dust removal device for a color sorting machine that maintains the color sorting machine in a normal state and performs efficient dust removal to maintain a clean environment inside and outside the sorting room.

The present invention will be explained with reference to embodiment figures. Figures 1 and 2
In the figure, a vibrating grain feeding device consisting of a vibrating grain feeding gutter 3 equipped with a vibrating device 2 is installed on the earthen wall of a vertical machine frame 1, and a feeding hopper 4 is mounted on the feeding side of the vibrating grain feeding device. None, it is connected to the flow N5 installed in an inclined manner on the discharge side of the vibrating grain feeding gutter 3, and the lower end of the flow path 5- is inserted into the earthen wall surface of the chamber frame of the photoelectric sorting chamber 6, and the said photoelectric sorting is carried out. Inside the chamber 6, a light source 7. Light receiving element 8. A plurality of photoelectric detection devices 10.10 consisting of a background 9 and an injection nozzle device 1
1 and the photoelectric detection device 10.10 is installed in the control device 12.
It communicates with the injection nozzle device 11 through the flow path A, detects the amount of light obtained by projecting light onto the particle bundle passing through the flow trajectory A, and operates the injection nozzle device 11 based on the detection signal to spray the different color particles. For sorting, 13 is a partition plate provided with a through hole 14, 15 is a bottom opening of the sorting chamber 6, and 16 is a grain collecting barrel for sorting grains.

Next, the dust removal device of the present invention has a discharge port 18 for different color particles, which is provided with a discharge valve 17 at the bottom opening 15 of the photoelectric sorting chamber 6.
A suction pipe 25 connected to a suction window 20 provided on the side wall surface 19 of the sorting chamber is connected to an exhaust fan 21, and a partition plate 22 for preventing foreign particles from entering the sorting chamber 6 is erected. A space between the partition plate 22 and the side wall surface 19 of the sorting chamber is formed in a wind selection chamber 23, which communicates with the air intake window 20.

With the above-described configuration, when the mixed raw material particles of different colors are put into the supply hopper 4 and the device is started, the mixed particles of different colors flowing down from the feed hopper 4 to the vibrating grain feeding 13 are transferred to the gutter 3.
Due to the vibration effect, the liquid flows down the flow path 5 surface and slides at an accelerated rate, and flows down in the photoelectric sorting chamber 6 along the flow trajectory A in a flying shape. In the photoelectric sorting chamber 6, the light-receiving element 5 receives the amount of light obtained from the different-colored particles and issues a signal. Based on the detection signal, the jet nozzle M11 blows air at the appropriate time, and due to the blowing action, the different-colored particles The selected unique particles accumulate on the discharge valve 17 and when a certain volume is reached, the discharge valve 17 is suppressed and opened by its weight to continuously discharge the excess particles. The sorted particles that fall from the outlet 18 and are removed from the machine and flow down the trajectory A are taken out of the machine via the particle sorting barrel 16 and left for the next step. Different-colored particles are injected by the blast action of the injection nozzle device 11, and at this time, the different-colored particles are prevented from flying upward toward the photoelectric sorting device 10 section by the partition plate 13, but they adhere to or get mixed in with the particles. Dust, bran powder, etc. are injected together and freely scatter and float, resulting in the above-mentioned photoelectric detection device 10.1.
0 will result in a malfunction. The dust removal device of the present invention includes:
When the exhaust fan 21 is rotated, the dust-containing wind generated by the blast action of the different-colored particles and floating in the photoelectric sorting chamber 6 flows in a roundabout manner into the air intake port 24 at the lower end of the partition plate 22, and is sucked. While the wind flows upstream in the wind selection chamber 23, dust, bran powder, small particles, etc. are sucked into the exhaust fan 21 through the wind suction window 20 and removed, and particles with unusual colors are subjected to specific gravity wind selection and fall under their own weight. The particles flow down to the different color particle discharge port 18 of the bottom opening 15 of the photoelectric sorting chamber 6 and accumulate therein, and the collected different color particles open the discharge valve 17 and the excess particles are removed from the machine.

The dust removal device of the present invention sucks and removes dust and the like through the air selection chamber 23, so even if there are particles of a different color that enter the air selection chamber 23, they can be dropped by specific gravity sorting, so they can be removed from the air intake window. There is no need to provide a porous wall plate to prevent particles of different colors from being sucked into the exhaust fan 21, and even small particles can be sucked out without clogging the porous wall plate surface with dust, etc., which occurs with conventional devices. Since strong winds can be used, the inside of the photoelectric sorting device 6 can be kept clean at all times, and efficient color sorting can be continued for a long time, greatly improving sorting efficiency.

Reference numeral 26 in FIG. 2 indicates an I! installed in the intake pipe 25 connected to the exhaust fan 21. This is a lω control valve, and the control valve 26 can freely adjust the wind speed in the wind selection chamber 23 to prevent different color particles from being attracted to the exhaust fan 21 and to remove small particles.

Note that the exhaust fan is not limited to the example shown in the drawings, and the intake pipes of a plurality of color sorters may be connected to a single exhaust fan for use.

Reference numeral 27 in FIG. 3 is a louver window plate installed in the air intake port 24 of the wind selection chamber 23, and when the dust-containing wind detours and flows into the wind selection chamber 23, the blast nozzle device 11 acts. This causes the scattered particles of different colors to collide and fall downward, thereby preventing the particles of different colors from entering the wind selection chamber 23, thereby increasing the suction air and improving the dust removal performance.

FIG. 4 shows one in which the partition plate 22 is formed by a louvered window 28, and one in which the middle part or the end part of the wind selection chamber 23 is enlarged, and the velocity of the incoming wind is reduced in the enlarged part to perform specific gravity wind selection. This figure shows another embodiment of the wind selection chamber structure that promotes the action.

In this way, the dust removal device of the color sorter of the present invention has an outlet for dissimilar color particles in the bottom opening of the photoelectric sorting chamber, and connects the air intake pipe connected to the air intake window provided on the side wall of the sorting chamber to the exhaust fan. At the same time, a partition plate was installed in the sorting chamber to prevent foreign particles from entering, and a space between the partition plate and the side wall of the sorting palm was formed in the wind sorting chamber and communicated with the air intake window. Floating dust, etc., which is scattered in the photoelectric sorting chamber by the blast of air, is separated into different color particles and dust by specific gravity air in the air selection room.The dust, etc. is sucked into the exhaust fan through the ventilation window and removed, and the different color particles are removed by the suction action. Because it is configured so that it falls into the discharge port for different-color particles under its own weight, it solves the problem of clogging caused by dust on the porous wall plate surface that occurred in conventional equipment, and improves sorting efficiency by eliminating operation stoppages due to cleaning. It is possible to maintain normal detection sensitivity by preventing poor sensitivity due to adhesion and floating of dust to the photoelectric detection device, and to maintain a clean environment inside and outside the sorting room by performing efficient dust removal. It is effective.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the present apparatus, and FIGS. 2, 3, and 4 are enlarged sectional views of a photoelectric sorting chamber equipped with a wind screening chamber of each embodiment.

Claims (3)

[Claims] (1) Particles mixed with different color grains are allowed to flow down from the vibrating grain feeder onto the flow path surface, and a photoelectric detection device consisting of a light source, a light receiving element, and a background, and an injection nozzle device are provided around the flow trajectory along which the mixed particles pass. A photoelectric sorting chamber is provided, an outlet for unusually colored particles is provided at the bottom opening of the photoelectric sorting chamber, and an air intake pipe connected to an air intake window provided on the side wall of the sorting chamber is connected to an exhaust fan. A color sorting machine characterized in that a partition plate for preventing the intrusion of particles of different colors is erected in the sorting chamber, and a space between the partition plate and the side wall of the sorting chamber is formed into a wind sorting room, which communicates with the air intake window. dust removal equipment. (2) A dust removal device for a color sorter as set forth in claim (1), wherein an air volume control valve is installed at an arbitrary location of the air intake pipe. (3) A dust removal device for a color sorter as set forth in claim (1) or (2), wherein a louver window plate is installed at the air intake port of the wind selection chamber.