JP2004174628A - Foreign substance separation device in grinding material circulation use system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foreign substance separation device in a grinding material circulation use system, keeping favorable separation function for a long time by preventing clogging while keeping precise and efficient separation action as an advantage of a filter. <P>SOLUTION: This foreign substance separation device in a grinding material circulation use system includes: a casing 17 where gas to be processed containing a grinding material and foreign substance is let flow in in the tangential direction to generate a swirl flow inside; and a cylindrical filter 18 provided in the central part of the swirl flow, wherein the foreign substance is separated from the gas to be processed by the filter 18. In the filter 18, gas jetting nozzles 27, 28 having jet orifices 29, 20 oriented outward are rotatably provided along the filter 18, and rotated in the same direction as the direction of swirl flow of the gas to be processed to prevent clogging of the filter. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a foreign matter separation device in a polishing material recycle system that is suitable for circulating and using a polishing material in a blast device or the like used for precision processing such as rib formation of a plasma display panel.
[0002]
[Prior art]
Regarding the foreign matter separation device in this kind of abrasive material circulation use system, conventionally, for example, a processing target gas containing used abrasive material and foreign matter is supplied to a space in which a multi-stage diffusion plate is installed, A device that uses a difference in specific gravity of particles to discharge dust having a small mass upward while separating a gas to be treated against each diffusion plate, and separates a reusable abrasive material downward (Patent Document 1) , A gas to be treated containing used abrasives and foreign matter is fed into the casing, and the gas to be treated is lifted by an ascending airflow supplied from below the casing, and separated by a filter to remove the foreign matter. Is known (Patent Document 2). However, in the case of the prior art utilizing the difference in specific gravity of particles as in the former case, it has been difficult to accurately and efficiently perform a fine separation action. In the case of the prior art using a filter as the latter, if the mesh of the filter is reduced in order to separate fine abrasive material required in the case of precision processing, clogging is likely to occur, There is a problem that the original separation function cannot be maintained.
[0003]
[Patent Document 1]
JP-A-8-25223 [Patent Document 2]
Japanese Patent No. 2923464
[Problems to be solved by the invention]
The present invention has been developed in view of the above-mentioned conventional technical situations, and maintains a precise and efficient separation effect, which is an advantage of a filter, while preventing clogging for a long time. It is an object of the present invention to provide a foreign matter separating apparatus in an abrasive cleaning and recycling system capable of maintaining a proper separating function.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has an inlet for inflowing a gas to be treated containing a polishing material and foreign matter from a tangential direction and an outlet for flowing out a treated gas, and generates a swirling flow inside. A casing, and a cylindrical filter provided at the center of the swirling flow, wherein a foreign matter separation device in a polishing material recycle use system that separates foreign matter from a gas to be treated by the filter. A technical means is adopted in which a gas injection nozzle having an outwardly directed injection port is rotatably provided along the filter so as to rotate in the same direction as the direction of the swirling flow of the gas to be treated. According to the present invention, a jet of air or the like from a gas injection nozzle is sprayed on the surface of the filter by employing the above technical means, so that the jet prevents particles from adhering to the filter surface and causes clogging. The occurrence of occurrence can be accurately prevented. Moreover, since the gas injection nozzle is configured to rotate in the same direction as the swirling flow of the gas to be processed, clogging can be prevented without disturbing the swirling flow of the gas to be processed.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is suitable for a system for circulating and using abrasive material such as a blast device used for precision processing such as rib formation of a plasma display panel. It is also effective as a foreign matter separation device in a cleaning material circulation use system. The specific shape and the number of the gas injection nozzles or the specific shapes and the number of the injection ports formed in the gas injection nozzle can be freely selected as necessary. For example, as in the following embodiment, a nozzle is formed by simply forming a hole at a predetermined position of a pipe-shaped gas injection nozzle, or a similar gas injection nozzle is formed at a predetermined position of a gas injection nozzle into a slit shape. Formed ones are possible. Further, the rotation driving means of the gas injection nozzle may be an electric motor or a fluid actuator. Furthermore, it is also possible to provide a brush near the injection port formed in the gas injection nozzle so as to remove foreign matter on the filter surface.
[0007]
【Example】
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a schematic configuration diagram illustrating a system for circulating and using abrasive material in a blast apparatus to which the present invention is applied. In the drawing, reference numeral 1 denotes a blasting apparatus, and an injection nozzle 4 for spraying an abrasive material to a workpiece 3 is provided in an internal blasting chamber 2. The spray nozzle 4 has an abrasive cleaning material supply pipe 5 for supplying a cleaning material obtained by separating a used cleaning material and a gas to be treated containing foreign matter, and a pump for supplying pressurized air. The pressurized air supply pipe 6 is connected, and a mixed flow of air and the abrasive material is jetted toward the work 3 while sucking the abrasive material by a high-speed flow of pressurized air. A hopper 7 is provided below the work 3 to collect used abrasive material. The abrasive material collected in the discharge portion 8 at the bottom of the hopper 7 is removed through a foreign matter separating device 10 provided with a filter according to the present invention disposed on the way through a collecting pipe 9 to remove relatively large foreign matter. Suction is drawn through the inlet 12 of the cyclone 11. The gas to be treated including the used abrasive material sucked into the cyclone 11 removes relatively small foreign matter from the upper foreign matter removal port 13 and separates the intended abrasive material by the cyclone separating action. It is configured to be collected from the lower abrasive material recovery port 14 and circulated through the abrasive material supply pipe 5. In this embodiment, the relatively small foreign matter removed from the upper foreign matter removing port 13 is removed by the dust collector 15 in this embodiment, and the remaining gas is exhausted. Due to the suction action of the dust collector 15, the inside of the cyclone 11 and the inside of the foreign matter separation device 10 are in a slightly negative pressure state, and the gas to be processed is discharged from the discharge part 8 of the hopper 7 to the cyclone 11 via the foreign matter separation device 10. Will be sent.
[0008]
FIG. 2 is a longitudinal sectional view showing an embodiment of the foreign matter separating apparatus 10, FIG. 3 is a sectional view taken along the line AA, and FIGS. 4 and 5 are partially enlarged views of essential parts. In the foreign matter separation device 10 according to the present embodiment, the inflow side pipe connection portion 16 connecting the recovery pipe 9 connected to the discharge portion 8 of the hopper 7 is formed at a position eccentric from the center as shown in FIG. . The gas to be treated including the collected abrasive is swirled through an annular passage 19 formed between the cylindrical casing 17 and the filter 18 while leaving relatively large foreign matters that cannot pass through the filter 18. 2 and is fed to the cyclone 11 from the upper outlet shown in FIG. The relatively large foreign matter whose flow has been blocked by the filter 18 falls by its own weight and is stored in a foreign matter pool 22 formed at the lower portion of the casing 17. In the figure, reference numeral 23 denotes a frame of the filter 18, a mesh member constituting the filter is provided on the outer peripheral surface of the frame 23, and particles containing a polishing material smaller than the mesh are passed through the opening 24. 20. In the drawing, reference numeral 25 denotes an inlet for the gas to be treated connected to the passage 19, and reference numeral 26 denotes an outlet for the treated gas from which the foreign matter has been removed by the filter 18 and connected to the inside 20 of the filter 18.
[0009]
Next, features of the present invention will be described. As shown in the drawing, inside the filter 18, in this embodiment, two gas injection nozzles 27 and 28 for blowing out air are concentrically rotatable along the inner surface of the filter 18. As described above, the number of the jet nozzles 27 and 28 can be increased or decreased as necessary. As shown in FIGS. 4 and 5, the gas injection nozzles 27 and 28 have a large number of injection ports 29 and 30 that are directed outward toward the inner surface of the filter 18. The gas injection nozzles 27 and 28 are supported by a mounting arm 31 rotatably disposed below the gas injection nozzles 27, and connected to communication pipes 32 and 33 at lower ends thereof to rotatably support the mounting arm 31. The shaft 34 is connected to an external pressure air supply source 36 via an air supply passage 35 formed by using a hollow portion of the shaft 34. A pulley 37 is fixed below the rotating shaft 34, and is linked to a pulley 40 fixed to an output shaft 39 of a drive motor 38 capable of speed control by a belt 41, so that the pulley 37 is supported by the mounting arm 31 via the rotating shaft 34. The gas injection nozzles 27 and 28 are configured to be driven to rotate in the same direction as the direction of the swirling flow of the gas to be processed. In the figures, 42 and 43 are bearings for supporting the rotating shaft 34, 44 is a rotary joint, 45 is a flow control valve, and 46 is a foreign matter discharge section.
[0010]
During the operation of the foreign matter separating apparatus 10, the gas injection nozzles 27 and 28 are rotated by the drive motor 38 via the rotary shaft 34 in the same direction as the swirling flow of the gas to be processed. Accordingly, pressure air jetted from a large number of outwardly directed injection ports 29 and 30 formed on the rotatable gas injection nozzles 27 and 28 is sprayed on the inner surface of the filter 18, and passes through the mesh of the filter 18. And blow it out. The particles remaining on the outer surface of the filter 18 are blown off by the pressure air blown out of the filter 18 through the mesh, thereby preventing the particles from dropping and clogging. Is possible. Moreover, since the gas injection nozzles 27 and 28 are rotated in the same direction as the direction of the swirling flow of the gas to be processed, the turbulence of the swirling flow of the gas to be processed caused by the pressure air injected from the injection ports 29 and 30 is small. Can be suppressed.
[0011]
【The invention's effect】
According to the present invention, a gas injection nozzle having an outwardly directed injection port in a filter is provided rotatably concentrically along the surface of the filter, and rotates in the same direction as the direction of the swirling flow of the gas to be treated. As a result, particles remaining on the outer surface of the filter are prevented from being clogged by the gas blown out through the mesh of the filter and clogging is prevented. It is possible to maintain stable. In addition, since the gas injection nozzle is rotated in the same direction as the direction of the swirling flow of the gas to be processed, the disturbance of the swirling flow of the gas to be processed caused by the pressurized air injected from the injection port of the gas injection nozzle is also suppressed. Can be.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram illustrating a system for circulating and using abrasive material in a blast device to which the present invention is applied.
FIG. 2 is a longitudinal sectional view showing an embodiment relating to a foreign matter separating device.
FIG. 3 is a sectional view taken along line AA in FIG. 2;
FIG. 4 is a partially enlarged view of a main part.
FIG. 5 is a partially enlarged view of a main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Blast apparatus, 2 ... Blast processing chamber, 3 ... Work, 4 ... Injection nozzle, 5 ... Polishing material supply pipe, 6 ... Pressurized air supply pipe, 7 ... Hopper, 8 ... Discharge part, 9 ... Recovery Pipe, 10: Foreign matter separator, 11: Cyclone, 12: Inlet, 13: Foreign matter removal port, 14: Abrasive material recovery port, 15: Dust collector, 16: Pipe connection, 17: Casing, 18: Filter, 19 ... Passageway, 20 inside, 21 pipe connection, 22 foreign matter pool, 23 frame, 24 opening, 25 inlet of gas to be treated, 26 outlet of treated gas, 27, 28 gas Injection nozzle, 29, 30 ... Injection port, 31 ... Mounting arm, 32, 33 ... Communication pipe, 34 ... Rotary shaft, 35 ... Air supply path, 36 ... Pressure air supply source, 37 ... Pulley, 38 ... Drive motor, 39 ... output shaft, 40 ... pulley, 41 ... belt, 42, 43 ... bearing 44 ... rotary joint, 45 ... flow control valve, 46 ... foreign matter discharge part

Claims (1)

A casing for generating a swirling flow inside, having an inlet for inflowing the gas to be treated containing the abrasive and foreign matter from the tangential direction and an outlet for flowing out the treated gas, and a central portion of the swirling flow. A foreign matter separation device in an abrasive cleaning and circulating use system for separating foreign matter from a gas to be treated by the filter, the gas injection having an outwardly directed injection port in the filter. A foreign matter separating apparatus in a polishing material recycle use system, wherein a nozzle is rotatably provided along the filter so as to rotate in the same direction as the direction of the swirling flow of the gas to be treated.

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