JPS62266110A - Filter device - Google Patents

Abstract

PURPOSE:To continue the stabilized filter operation in a range over long time by providing a reservoir for a fold material wherein the solid material incorporated in dirty liquid falls and collects to the bottom of a vessel in the inflow port side of filter vessel divided by a filter element. CONSTITUTION:Dirty liquid used in the discharge processing or the like is introduced and fed into a filter vessel 1 closed by a cover 2 through a pipe 7 and filtered by a filter element 3 and the purified filtrate passes through perforations of a tubular axis 4 and sucked through a catchment pipe 5 by a pump 9 to flow to the outside. The required filter pressure is allowed to act on the liquid fed through the pipe 7. Solid materials 8 such as processing ships separated by the element 3 fall i the vessel 1 and deposit in a reservoir 11 for solid materials. The solid materials filtered and separated by actuating a vibrator 10 in a time of clogging of the element 3 or in a prescribed interval or continuously in the filter operation successively fall from the outer wall of the element 3 and collect in the reservoir 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a filter device for filtering a dirty liquid into a clean liquid by means of a filter element.

[Prior art]

BACKGROUND ART Conventionally, as a filter device for electrical discharge machining fluid, one in which a cylindrical filter element is coaxially inserted into a cylindrical container and the flow is filtered from the outside to the inside of the element has been used. Figure 2 shows the filter device, where 1 is a cylindrical container, 2 is a lid,
3 is a cylindrical filter element that is coaxially inserted into the container. Reference numeral 4 indicates a tube shaft supporting the element, 5 indicates a cleaning liquid collecting pipe passing through the central axis, and a large number of holes are perforated in 4 and 5, so that the filtrate flows out through the pipe 5 and covers the pipe. 7
is the sewage supply port.

〔problem〕

In the above device, oil or water of the dirty liquid to be filtered is supplied from the pipe 1 to the bottom of the container 1, and the filter element
The cleaning liquid filtered through 3 flows out through liquid collection vibrator 5. Solid matter such as particles in the dirty liquid collected by the filter element 3 adheres to the outer periphery of the filter element 3 and falls to the surrounding area as the amount increases. However, as the amount of solid matter 8 deposited around the filter element 3 on the sewage supply side increases, the filtration area of the filter element 3 gradually becomes narrower and the filtration capacity decreases, and the filtration capacity does not remain constant for a long time. There were drawbacks. For example, when filtering machining fluid during electric discharge machining, there is a drawback that due to changes in the amount of filtration, it is not possible to supply a constant amount of clean and filtered machining fluid to the machining gap, resulting in changes in machining performance and machining speed.

[Means for solving problems]

The present invention has been proposed in order to eliminate the above-mentioned drawbacks of the conventional art, and a solid matter reservoir is provided at the bottom of the inlet side of the filter vessel divided by the filter element, in which the solid matter in the waste liquid falls and accumulates. It is characterized by this.

〔Example〕

The present invention will be explained below with reference to an embodiment of the drawings.

In FIG. 1, reference numeral 1 denotes a container, which is formed into a cylindrical shape, in which filter membranes 1 to 3 are installed in the center, and a recessed solids reservoir 11 is formed in the bottom around the container.

The liquid collection pipe 5 was penetrated upward, but as shown in Fig. 2, it was penetrated downward '1! L is also good. Reference numeral 9 denotes a suction pump for discharging the cleaning liquid in the vibrator 5, and the cleaning liquid is discharged through the vibrator. 10 is a vibrator provided at the upper end of the filter element 3.

Dirty liquid used for electric discharge machining, etc. is supplied from the pipe 7 into the container sealed by the lid 7, and is filtered by the filter element 3. The filtered clean liquid passes through the through hole of the tube shaft 4, and is passed through the liquid collection pipe 5. , and is sucked out to the outside by the pump 9. A required filtration pressure is applied to the liquid supplied from the vibrator 7/11. The solids 8, such as processed chips, separated by the filter element fall within the container and accumulate in the solids reservoir 11. When the filter element 3 becomes clogged, or by operating the vibrator 10 at predetermined intervals or continuously during the filtration operation, the filtered and separated solids 8 fall one after another from the outer wall of the filter element 3 and become solids. It accumulates in the reservoir 11.

Since the solids reservoir 11 is provided by forming a recess in the bottom of the container, it has sufficient volume and can continue continuous filtration work for a long time, and the filter element 3 always has the required filtration area. , can be filtered with a certain filtration ability.

Further, since the filter element performs filtration work while removing and purifying solid matter adhering to the outer wall by the vibrator 10, stable filtration performance can be maintained during processing. Vibrator 1
0 is 1 to 1000) Approximately 1z vibration is applied. The vibration may be a shock or an impulse. Of course, this vibration can be propagated through the processing liquid or from outside the container 1 and applied.

The filter element 3 is preferably made of synthetic resin or the like so as to withstand the vibrations applied thereto. The cleaning liquid filtered through the filter element 3 is sucked and discharged by the suction pump 9.
This allows continuous and stable filtration work.

In FIG. 3, a pedestal 12 is provided at the center of the bottom of the container 1, and a filter element 3 is provided on this pedestal 12, so that a solids reservoir 11 is formed around the pedestal 12.

Note that it is convenient to provide a lid for opening and closing the solid matter reservoir 11 so that the accumulated solid matter 8 can be easily removed and cleaned.

〔Effect of the invention〕

As described above, according to the present invention, a solids reservoir is provided at the bottom of the container on the inlet side of the wastewater of the filter container divided by the filter element, and the solids in the wastewater fall and accumulate therein, so that the solids are not filtered and separated. It is possible to deposit a large amount of solid matter, and the filter element can maintain a constant m'iA area at all times and continue stable filtration work over a long period of time with a constant filtration capacity. In addition, a vibrating device that applies vibration directly to the filter element or through the liquid or container is installed, and the solid matter attached to the filter element is filtered while being vibrated and dropped, so that the filter element can be filtered continuously without clogging. Stable filtration can be performed.

-〇- Therefore, according to the present invention, the machining fluid filter element for electrical discharge machining equipment is particularly effective as a filter for wire-cut electrical discharge machines that use machining fluid with low viscosity such as water, and machining chips can be easily removed. The filtration work of the filter element, which is separated and does not fall and become clogged, has the effect of constantly supplying a constant amount of clean machining fluid and maintaining stable electrical discharge machining for a long period of time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 3 is a diagram of another embodiment, and FIG. 2 is a conventional filter device. 1...Filter container 2...Lid 3...Filter element 5...
...Liquid collection pipe... Sewage supply device 8... Solid matter 9... Suction pump 10... ...vibrator

Claims (3)

[Claims] (1) A filter container having an inlet for dirty liquid and an outlet for clean liquid, a filter element that divides the inside of the container into the inlet side and the outlet side, and the flow divided by the filter element. A filter device characterized in that a solid matter reservoir is provided at the bottom of the container on the inlet side, in which solid matter in the sewage falls and accumulates. (2) A filter container having an inlet for dirty liquid and an outlet for clean liquid, a filter element that divides the inside of the container into the inlet side and the outlet side, and the flow divided by the filter element. A filter device comprising: a solids reservoir in which solids in dirty liquid fall and accumulate at the bottom of the container on the inlet side; and a vibration device that applies vibrations to the filter element directly or through the liquid or the container. (3) The filter device according to claim 1, further comprising a suction pump for discharging the cleaning liquid.