JPH0137964B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a method for cleaning coolant used in machine tools, etc. by removing fruits such as non-magnetic chips from the coolant and making it possible to reuse the coolant. The present invention relates to a cleaning device using a non-replaceable filter that prevents clogging of the filter and maintains high separation and removal ability over a long period of time.

Conventional technology For example, cleaning devices used to reuse coolant mixed with non-magnetic chips, etc., are well known to use filter paper or wire mesh, but both of them use filters. The filters tend to get clogged, and the filters must be replaced or cleaned frequently, requiring a great deal of expense and labor to maintain and inspect them.

In addition, a filtration device (Japanese Utility Model Publication No. 55-6660) has been proposed in which a screen having pores or minute slits is arranged in a cylindrical shape and is constantly vibrated to classify the raw material supplied from the outside of the screen into the inside and outside of the screen. ing.

In addition, a similar filtration net is arranged in a roughly cylindrical shape, and the dust in the liquid that flows into the filtration net from the opening is captured as it passes through the filtration net, and the dust attached to the filtration net is periodically removed by sliding. A strainer (Japanese Utility Model Publication No. 1983-6861) has been proposed in which the scraping fluid is discharged from a lower drain with a scraper.

Problems with the conventional technology Both types of filters prevent clogging of the filter, but the former is inherently difficult to use when used as a cleaning device for contaminated coolant liquid mixed with a large amount of chips, etc. In the latter case, not only does clogging occur early and the filtration capacity decreases, but also the number of times the lower drain is opened increases, causing a significant decrease in filtration efficiency.

Usually, the cleaning of coolant liquid is carried out continuously with a large throughput per unit time, so the above-mentioned filter is not suitable for such use.

An object of the present invention is to provide a coolant liquid cleaning device that uses a filter having a high filtration capacity, prevents the filter from clogging, and enables long-term use.

Structure of the Invention This invention provides a method for scraping up chips, etc. that have settled on the bottom of the treatment tank to the upper end of the tilted tank, between one end of a horizontally arranged treatment tank into which contaminated coolant flows and an inclined tank connected to the other end. A scraper conveyor with a large number of scrapers that are discharged to the outside of the tank is installed horizontally, and filter members made of wires, shapes, etc. with triangular cross-sectional diameters are arranged in multiple rows at predetermined minute intervals with their bottoms flush on the same surface. At least one filter plate is installed to separate fine chips in the liquid, and the filter plate is placed in the processing tank so that the scraper slides in contact with the bottom surface of the filter plate, and the filter plate is separated into two upper and lower chambers. ,
It is constructed to form an upward flow of coolant by suctioning or overflowing the coolant from the upper chamber side, and uses the vibration of the vibrator attached to the filter plate and the scraper to remove chips etc. adhering to the bottom surface of the plate into the processing tank. This is a coolant cleaning device characterized by separating and settling the coolant liquid to the bottom.

Disclosure of the Invention Based on the Drawings Examples of the present invention will be described below based on the drawings. Here, an example of a device that continuously processes a large amount of coolant liquid discharged from a large number of machine tools is shown.

FIG. 1 is a partially vertical perspective view of a cleaning device illustrating a filter plate according to the present invention.

2 to 5 show the cleaning device according to the present invention, FIG. 2 is a vertical cross-sectional view, FIG. 3 is a top view,
Figure 4 is a vertical sectional view along the line of Figure 2;
The figure is a longitudinal sectional view taken along the line of FIG. 2.

Configuration As shown in Fig. 1, the filter plate 1 is
A plurality of long filter members 2 having a triangular cross-sectional shape are used, and the bottom surfaces of each member 2 are aligned on the same plane and arranged in parallel at a predetermined interval. The vertices of 2 are connected and fixed to form a flat plate, and a large number of slits of a predetermined minute width are arranged in parallel on the bottom surface of the plate.

Furthermore, the connecting tool 3 is fixed to the frame 4 so that it can be mounted on the frame.

The cleaning device has the above-mentioned three filter plates 1 arranged in series in a horizontally arranged processing tank 10 for cleaning coolant liquid, and the coolant liquid discharged from the machine tool is collected between each filter plate 1. An inflow chamber 14 is provided.

To be more specific, in the processing tank 10, the above filter plate 1 is mounted on a seat 11 protruding from the tank wall, and the processing tank 10 is divided into an upper chamber 12 and a lower chamber 13.

Further, the upper chamber 12 of the processing tank 10 is divided into three parts by the two inflow chambers 14 described above, and the lower chamber 13 is commonly communicated with the inflow chamber 14 described above.

Furthermore, an inclined tank that rises at a required angle is provided at one end in the longitudinal direction of the processing tank 10, and between the upper part of the inclined tank and the lower chamber 13 at the other end of the processing tank 10, scrapers 21 are installed horizontally at required intervals. A conveyor 21 is installed to scrape out chips and the like that have settled on the bottom of the processing tank 10 and collect them in a chip receiving box 22.

Each scraper 21 of this scraper conveyor 20 is positioned so as to be able to slide into contact with the lower surface of the filter plate 1.

Further, each upper chamber 12 is connected to a liquid storage tank 15, and the purified coolant liquid enters the liquid storage tank 15, is pumped out by a pump P as needed, and is supplied to the machine tool.

Function/Effect In the cleaning device configured as described above, the contaminated coolant liquid discharged from the machine tool first enters the inflow chamber 14 and is introduced into the lower chamber 13 of the processing tank 10, and large chips etc. from the machine tool are removed. It settles here.

Furthermore, when the coolant liquid is sucked by the pump P on the upper chamber 12 side, an upward flow is generated from the lower chamber 13 to the upper chamber 12, and fine chips and the like in the coolant liquid rise together with the liquid. In the filter plate 1, among foreign substances such as chips, those larger than the slit width of the filter plate 1 cannot pass through and are separated, and foreign substances smaller than the slit width are also separated by foreign substances attached to the bottom surface of the filter plate 1. Even fine foreign matter that has passed through the filter plate 1 falls down and passes through the member 2 because the flow velocity between the slopes of the filter member 2 suddenly becomes slower than the flow velocity at the slit portion.
Attach to.

The mechanism described above removes fine chips, etc.
The purified coolant liquid rises to the upper chamber 12, and eventually overflows to the liquid storage tank 15, where it is stored.

When the inflowing coolant reaches a predetermined water level, the purified coolant is pumped up by the pump P and sent to the machine tool for reuse.

Next, when the chips and the like settled on the bottom of the lower chamber 13 reach a predetermined amount, or periodically, the scraper conveyor 20 is operated to scrape and collect the chips and the like out of the tank.

At this time, the scraper conveyor 20 is configured as an endless conveyor with two stages, upper and lower. First, the upper stage slides into contact with the bottom surface of each filter plate 1 to scrape off chips, etc. adhering to it, and then turns over. Then, chips and the like accumulated on the bottom surface of the processing tank 10 are scraped out of the tank at the lower stage.

Therefore, the shape and dimensions of each member 2 of the filter plate 1 and the interval between the members may be appropriately selected depending on the shape and size of the foreign matter such as chips to be separated and removed.

Moreover, by scraping off foreign matter adhering to the bottom surface of the filter plate 1 with the scraper 21 at a timely manner, clogging of the slit portion can be prevented.

However, since the above-mentioned scraping alone is insufficient to remove fine chips etc. adhering to the filter plate 1, a vibrator 5 is mounted on each filter plate 1 as shown in the figure.
It is best to apply vibration to the entire unit to remove foreign matter and prevent clogging. Furthermore, it is not necessary to apply vibrations all the time; for example, it may be applied intermittently as appropriate.

The vibrator for applying vibrations, for example, predetermined microvibrations or shocks to the entire filter plate 1, is preferably an air cylinder or the like that can be installed directly on the filter plate 1, as shown in the embodiment. That is, when vibration is applied via an intermediate member as in other systems, there is a problem that the predetermined vibration is not transmitted to the entire plate 1 and the effect of preventing clogging is reduced, so a pneumatic cylinder or the like that can be directly installed is preferable.

Note that the filter member 2 has a predetermined cross-sectional shape.
Square wire, molded material, etc. can be used, and a wide variety of materials can be used.

Effects of the Invention The cleaning device according to the present invention uses a filter plate with high filtration capacity, and uses a scraper and vibration to prevent the filter from clogging, enabling long-term use, and eliminating the possibility of a large amount of chips getting mixed in. It has the advantage of being able to continuously process large amounts of coolant liquid.

[Brief explanation of drawings]

FIG. 1 is a partially vertical perspective view of a cleaning device illustrating a filter plate according to the present invention. Second
Figures 5 to 5 show embodiments of the present invention, and the second
The figure is a longitudinal cross-sectional view, the third figure is a top view, and the fourth figure is a second figure.
FIG. 5 is a longitudinal sectional view taken along the line FIG. 2. FIG. DESCRIPTION OF SYMBOLS 1... Filter plate, 2... Filter member, 3... Connector, 4... Frame, 5... Vibrator, 10... Processing tank, 11... Seat, 12... Upper chamber, 13... Lower chamber, 14...Inflow chamber, 15...
...Liquid storage tank, 20...Scraper conveyor, 21
...Scraper, 22...Chip receiving box, P...Pump.

Claims (1)

[Claims] 1. A scraper is installed between one end of the horizontally arranged treatment tank into which the polluted coolant fluid flows and a tilted tank connected to the other end to scrape up chips etc. that have settled on the bottom of the treatment tank to the top of the tilted tank and discharge them to the outside of the tank. A scraper conveyor with a large number of horizontally suspended scraper conveyors is installed, and a plurality of filter members made of wires, shapes, etc. with triangular cross-sections are arranged side by side at predetermined minute intervals with their bottoms aligned on the same surface to make fine cuts in the liquid. At least one filter plate for separating powder is used, and the scraper is placed on the underside of the filter plate to separate it into two upper and lower chambers. It is configured to form an upward flow of liquid by suction or overflow, and the vibration of the vibrator attached to the filter plate and the scraper cause chips etc. attached to the bottom surface of the plate to be separated and settled at the bottom of the processing tank. A unique coolant cleaning device.