JP4097107B2 - Grinding fluid grindstone removal method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grinding fluid grindstone removal method, and in particular, a grinding fluid is sucked by a negative pressure when air is sucked, and this air is supplied back to a filter for cleaning, thereby improving work efficiency and improving the quality of the grinding fluid. It relates to a new improvement for maintenance.
[0002]
[Prior art]
Conventionally, a grinding liquid used in a grinding machine contains grinding metal and grindstone grains during processing, and the metal is removed by a rotary magnet type removing device using a rotary magnet roller and a separator plate.
In addition, a precipitation supernatant circulating device in which the grindstone particles are guided to a precipitation-type tank and the supernatant of the grinding fluid is supplied to the grinding stone by a pump is widely used.
Furthermore, as another conventional example, an electric pump purifier using an electric pump and a filter is used as disclosed in JP-A-10-5755.
[0003]
[Problems to be solved by the invention]
In a conventional rotary magnet type removal device, non-metallic grinding stone particles cannot be removed because they cannot be adsorbed, and grinding stone particles are deposited in a precipitation tank. In order to remove the accumulated grindstone sludge, the machine was periodically stopped, and extensive removal cleaning was required. In addition, if it is regularly removed by using an electric pump purification device, etc., the filter is often clogged, the filter needs to be replaced frequently, and the work efficiency is neglected and the replacement is troublesome. The pump was clogged and failed, and it was difficult to use it on a daily basis, and maintenance could only be performed during extensive removal and cleaning.
[0004]
The present invention has been made to solve the above-described problems. In particular, the precipitated grindstone sludge is pumped into the sludge storage container by negative air pressure, filtered through the filter by pressurization, and the filter is automatically reversed. It is an object of the present invention to provide a grinding fluid grindstone removing method and apparatus which perform jet cleaning, perform pumping, filtration, and filter cleaning cycles again.
[0005]
[Means for Solving the Problems]
The grinding fluid grindstone removal method according to the present invention is a grinding fluid grindstone removal method in which the grinding stone in the grinding fluid is removed by filtration through a filter. In this method, after collecting the filtrate introduced into the container and filtered by the filter, the filter is back-washed by blowing air from the inside to the outside of the filter and used for the next filtration. In this method, the grinding fluid is forcedly filtered by the filter by applying air pressure to the filter, and the grinding fluid is agitated by adding the air pressure to the grinding fluid in the purification tank.
The grinding fluid grindstone removing device according to the present invention is a grinding fluid grindstone removing device in which the grinding stone in the grinding fluid in the purification tank is removed by filtration through a filter. A sludge storage container connected to the filter, a return tank for receiving the grinding fluid from a discharge pipe connected to the filter, an air ejector connected to the sludge storage container, the discharge pipe and the air An air source connected to an ejector, and the air ejector draws the grinding fluid into the sludge storage container by making the inside of the sludge storage container have a negative pressure, and the air of the air source is drawn from the inside of the filter. The filter is configured to perform reverse cleaning of the filter by spraying outward, and further, an air ejector connected to the air ejector. A solenoid valve and a discharge solenoid valve provided in a discharge pipe connected to the filter, the purification tank passing through the sludge storage container and the suction pipe in a state where the air eject solenoid valve and the discharge solenoid valve are closed The grinding liquid is agitated by supplying air into the inside.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a grinding liquid grindstone removing method and apparatus according to the present invention will be described with reference to the drawings.
1 is a sludge storage container, and a suction pipe 2 and a cylindrical filter 3 are provided on the inside thereof, and are fixed to a bottom seal adapter 4 with a screw 6 via a packing 5. ing.
Next, a lid 10 is fixed to the upper portion of the sludge storage container 1 by a fastener 11 via a packing 12. Further, the seal adapter 4 is fixed by a mounting hook 9 via a stationary base portion 7 and an O-ring 8. Accordingly, the sludge storage container 1 is configured so that it can be removed when the sludge is discharged by removing the upper lid 10 and removing the attachment hook 9 to remove the sludge storage container 1 from the stationary mount section 7.
Next, an air ejector 13 having a nozzle 13A is coupled to the upper portion of the lid 10, and this air ejector 13 communicates with the sludge storage container 1 so that the air pressure inside the container is reduced to a negative pressure. Yes. The suction pipe 14 is connected to the stationary gantry 7 and is configured to guide the dirty grinding liquid 26 in the purification tank 25 to the sludge storage container 1. Further, the discharge pipe 15 is connected to the stationary mount section 7 and configured to discharge the grinding liquid in the sludge storage container 1 to the return tank 27 by the operation of the discharge electromagnetic valve 16. The suction pipe 2 and the suction pipe 14 are configured to communicate with each other.
Next, an air ejecting electromagnetic valve 19 is provided on the outlet side of the air ejector 13 via a pipe 18, and the air ejector 13 is configured to operate when the electromagnetic valve 19 is turned on (opened).
[0007]
Furthermore, a direction switching electromagnetic valve 21 is connected to an air source 30 via a pipe 20 and a pressure reducing valve 22 at the inlet of the air ejector 13. Further, the pipe 20 is connected to the discharge pipe 15 via the filter reverse cleaning electromagnetic valve 17. Further, a semi-opening / closing plate valve 23 with a throttle hole is provided at the upper portion of the suction pipe 2 so as to be freely opened and closed.
In FIG. 1, when the air ejector solenoid valve 19 is turned on (opened) and then the direction switching solenoid valve 21 is turned on and air pressure is supplied from the air source 30 through the valve symbol P-B, high-speed air is supplied from the nozzle 13A. From the Bernoulli theorem, the sludge storage container 1 has a negative pressure in comparison with the external pressure. When the air eject solenoid valve 19 is turned off (closed), the air from the air source is in a pressurized state because the ejection from the jet nozzle 22 is guided to the inside of the sludge storage container 1. At this time, the direction switching solenoid valve 21 is turned off so that the jet from the jet nozzle 22 can be controlled and adjusted, and the air pressure is controlled and adjusted by the pressure reducing valve 22 through the valve symbol PA.
Further, when the air eject solenoid valve 19 is turned on (opened) and the filter reverse cleaning solenoid valve 17 is turned on (opened), the air pressure from the air source is ejected from the inside of the filter 3 to the outer periphery from the discharge pipe 15. It is configured so that clogging can be cleaned from the opposite direction.
[0008]
Next, the operation will be described. A grinding fluid 26 from a grinding machine (not shown) is introduced into the purification tank 25 through a supply pipe 24, and the grinding fluid sucked and filtered by the grinding fluid grindstone removing device is fed back. It is used again by a grinding machine (not shown) through the tank 27.
In FIG. 1, when the air eject solenoid valve 19 is first turned on (opened) and then the direction switching solenoid valve 21 is turned on, the inside of the sludge storage container 1 becomes negative pressure by the action of the air ejector 13, and the purification tank 25. The grinding liquid 26 pushes up the half opening / closing plate valve 23 with a throttle hole of the suction pipe 2 from the suction pipe 14 and drips and stays in the sludge storage container 1. The air eject solenoid valve 19 is turned off (closed) and the direction switching solenoid valve 21 is also turned off at the same time after a lapse of a predetermined time so that the liquid level inside becomes the height of the filter 3. As a result, the air pressure adjusted by the pressure reducing valve 22 is pressurized into the sludge storage container 1, and the half open / close plate valve 23 with the throttle hole of the suction pipe 2 is pushed down and closed, and the suction pipe 14 flows back through the throttle hole 23a. Then, the grinding fluid in the purification tank 25 is agitated by releasing pressure, and acts so that the grindstone particles in the next grinding fluid are difficult to accumulate. Subsequently, when the discharge electromagnetic valve 16 is turned on (opened) after a short period of time, the grinding liquid dripping and staying in the sludge storage container 1 is filtered by the filter 3 and guided to the return tank 27 through the discharge pipe 15. After the average time when the grinding fluid in the sludge storage container 1 becomes empty, the discharge solenoid valve 16 is turned off (closed), the air eject solenoid valve 19 and the filter reverse cleaning solenoid valve 17 are turned on (opened), and the filter The air pressure is sprayed from the inside to the outside of the filter 3, and the clogging of the filter 3 is washed from the opposite direction. The effectiveness of the filter 3 is restored and restored so that the next filtration is effective. After an average time effective for back cleaning, the filter back cleaning electromagnetic valve 17 is turned off (closed).
As described above, by operating the electromagnetic valves 16, 17, 19, 21, and 22, the grindstone particles contained in the grinding liquid are deposited in the sludge storage container 1 in a filtered state. Furthermore, each solenoid valve is operated by an electric controller (illustration and detailed description is omitted) using a sequence control device such as a well-known electromagnetic relay or timer, and the cleaning liquid 26 in the purification tank 25 is repetitively operated. The grindstone particles contained are sequentially stacked in the sludge storage container 1, and as a result, the grindstone particles can be automatically removed from the grinding liquid. If sludge accumulates in this sludge storage container 1, the attachment hook 9 and the fastener 11 will be cancelled | released, only the sludge storage container 1 will be removed, and sludge can be thrown away.
Further, when the configuration shown in FIG. 1 is shown for actual commercial use, the configuration shown in FIG. 2 can be disclosed. That is, the magnetic separator 100 is provided in the purification tank 25, the grinding water pump 101 is provided in the return tank 27, the sludge storage container 1 and the like are separated from the purification tank 25 and accommodated in the casing 102, and the control panel 103 is attached. . In addition, the same code | symbol is attached | subjected to the same part as FIG. 1, and the description is abbreviate | omitted.
[0009]
【The invention's effect】
Since the grinding fluid grindstone removing method and apparatus according to the present invention are configured as described above, the following effects can be obtained. That is, the grinding fluid is sucked into the sludge storage container by the negative pressure of air, the sludge is filtered by the filter by the air pressure, and the filter is back-washed and reused by supplying air from the inside to the outside. This makes it possible to remove non-metallic substances such as grindstone particles contained in a grinding fluid of a grinding machine, etc., and to form a sludge and to efficiently and automatically dispose of waste.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a grinding liquid grindstone removing method and apparatus according to the present invention.
FIG. 2 is a configuration diagram showing the commercial configuration of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sludge storage container 2 Suction pipe 3 Filter 10 Cover 11 Fastening metal fitting 13 Air ejector 13A Nozzle 14 Suction pipe 15 Discharge pipe 16 Discharge solenoid valve 17 Filter reverse washing solenoid valve 18 Pipe 19 Air eject solenoid valve 20 Pipe 21 Direction switching solenoid valve 22 Pressure reducing valve 23 Half open / close plate valve 24 with throttle hole Supply pipe 25 Purification tank 26 Grinding fluid 27 Return tank

Claims (4)

In the grinding fluid grindstone removal method in which the grinding stone in the grinding fluid (26) is filtered and removed by the filter (3), the grinding fluid (26) is a sludge storage container ( 1) Introduce into the filter, and collect the filtrate filtered by the filter (3), then blow air from the inside to the outside of the filter (3) to backwash the filter (3) and use it for the next filtration A grinding fluid grindstone removal method characterized by the above. By applying air pressure in the sludge storage container (1), the grinding fluid (26) is forcibly filtered by the filter (3), and the air pressure is removed from the grinding fluid (26 in the purification tank (25)). The grinding fluid grindstone removal method according to claim 1, wherein the grinding fluid (26) is agitated in addition to the grinding fluid. In the grinding fluid grindstone removing device, which removes the grinding stone particles in the grinding fluid (26) in the purification tank (25) through the filter (3), a suction pipe (14) is provided in the purification tank (25). A sludge storage container (1) having the filter (3) connected via a return tank (27) for receiving the grinding fluid (26) from a discharge pipe (15) connected to the filter (3) ), An air ejector (13) connected to the sludge storage container (1), and an air source (30) connected to the discharge pipe (15) and the air ejector (13), the air ejector ( 13), the grinding fluid (26) is sucked into the sludge storage container (1) by setting the inside of the sludge storage container (1) to a negative pressure, and the air from the air source (30) is filtered into the filter (3). A grinding fluid grindstone removing device, wherein the filter (3) is back-washed by spraying from the inside to the outside. An air eject solenoid valve (19) connected to the air ejector (13), and a discharge solenoid valve (16) provided in a discharge pipe (15) connected to the filter (3), the air ejector The grinding is performed by supplying air into the purification tank (25) through the sludge storage container (1) and the suction pipe (14) with the solenoid valve (19) and the discharge solenoid valve (16) closed. The grinding liquid grindstone removing device according to claim 3, wherein the liquid (26) is agitated.

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