JP2000246241A - Liquid separating apparatus and oil-water separating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently separate oil on the water surface. SOLUTION: A vertical rotating plate 15 is arranged on a water tank 11 and under a condition where the lower part of this rotating plate 15 is immersed in the water surface to which oil 13 rises, the rotating plate 15 is rotated. A plurality of scraping-out channels 19 are radially provided on the side faces of this rotating plates 15. The oil 13 and water 12 scraped out from the water tank 11 by means of these scraping-out channels are guided to an outside oil- water separator 21 through a casing 17 and a chute 18 and the oil 13 and the water 12 are separated in this oil-water separator 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid separator for separating two liquids and an oil / water separator for separating oil and water.

[0002]

2. Description of the Related Art Since oil is mixed in cutting water or the like of a machine tool, it is necessary to remove the oil. Conventionally, oil floating on the water surface of a cutting water tank storing the cutting water overflows from an oil discharge pipe connected to the side surface of the cutting water tank to separate the oil.

[0003]

The oil-water separation by the overflow is not efficient because not only oil but also a large amount of water is discharged.

The present invention has been made in view of the above points, and has as its object to efficiently separate two liquids having different specific gravities, and to efficiently separate oil on the water surface. is there.

[0005]

According to a first aspect of the present invention, there is provided a liquid tank containing one liquid and a liquid in which another liquid having a lower specific gravity than the one liquid floats in the liquid tank. A rotating plate that is rotated upward with the lower part immersed in the surface, a scraping groove provided on the rotating plate and inserted into a liquid surface on which another liquid is floating, and the inside of the liquid tank by the scraping groove. A liquid separating apparatus comprising a two-liquid separator for separating one liquid and another liquid scraped from the liquid.

[0006] The mixture of one liquid and the other liquid scraped out by the scraping groove of the rotating plate has a high concentration of the other liquid.
One liquid and another liquid can be efficiently separated from this mixed liquid by a two-liquid separator.

According to a second aspect of the present invention, there is provided a water tank containing oil-mixed water, and a rotary plate which is rotated upward while the lower part is immersed in a water surface in which the oil is floating in the water tank. And a scraping groove provided on the rotating plate and inserted into the surface of the oil floating surface, and an oil-water separator for separating oil and water scraped out of the water tank by the scraping groove. An oil-water separator.

Since the mixture of oil and water scraped by the scraping grooves of the rotary plate has a high oil concentration, the oil and water can be efficiently separated from the oil water by the oil-water separator.

According to a third aspect of the present invention, in the oil / water separation device according to the second aspect, a plurality of rake-out grooves are radially provided on at least one side surface of the rotary plate.

[0010] The plurality of radially provided scraping grooves can efficiently scrape oily water out of the water tank.

According to a fourth aspect of the present invention, the oil / water separator in the oil / water separator according to the second or third aspect has a plurality of chambers each having a lower part communicated with each other, and an oil drawn to the outside from the upstream chamber. It is provided with a discharge pipe and a water return pipe communicated from the downstream chamber into the water tank.

The oil overflowing from the upstream chamber in which the oil floats to the oil discharge pipe is discharged to the outside, and the downstream side in which only the water is stored, among the plurality of chambers with which the lower part communicates. The water overflowing from the chamber to the water return pipe is returned to the water tank.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to FIGS.
This will be described with reference to the embodiment shown in FIG.

In FIG. 1, reference numeral 11 denotes a water tank such as a cutting water tank of a machine tool, and used water 12 stored in the water tank 11 is mixed with oil 13. The upper surface of the water tank 11 is covered with a cover 14.

A rotary shaft 16 of the rotary plate 15 is rotatably supported by a casing 17 in a state where the lower portion of the rotary plate 15 is immersed in the water surface where the oil 13 is floating in the water tank 11.

The casing 17 has a bottom shape and is open to the bottom, and is fixed to the cover 14 of the water tank 11. A groove-shaped chute 18 for extracting oil and water to the outside is attached to a vertical wall portion on one side of the casing 17.

The rotating plate 15 is a vertical disk, and is rotated upward while the lower part is immersed in the water surface. On one side surface and the other side surface of the rotary plate 15, a plurality of rake-out grooves 19 to be inserted into the water surface on which the oil 13 is floating are provided radially.

At the tip of the chute 18, an oil / water separator 21 for separating the oil 13 and the water 12 scraped from the water tank 11 by the scraping groove 19 of the rotary plate 15 is arranged.

The oil / water separator 21 includes a plurality of chambers 22, 23, 24
Are communicated by lower openings 25 and 26, and an oil discharge pipe 27 is drawn out from a chamber 23 located at an intermediate but relatively upstream side, and a water return pipe 28 is formed from a relatively downstream chamber 24 to a water tank. It is communicated within 11. At the end of the oil discharge pipe 27, an oil receiving container 29
Is arranged.

As shown in FIG. 2, on one side of the casing 17, an electric motor 31 for rotating and driving the rotating shaft 16 of the rotating plate 15 and a speed reducer 32 are arranged. In FIG. 2, the chute 18 and the oil / water separator 21 are arranged compactly on the cover 14 of the water tank 11, and in this respect, the arrangement differs from the arrangement of FIG. They are the same.

Next, the operation of the illustrated embodiment will be described.

When the rotating plate 15 is rotated in the counterclockwise direction in FIG. 1 by the electric motor 31, the oil 13 floating on the water surface is lifted up by a plurality of radially provided scraping grooves 19. In addition, oily water 12 can be efficiently scraped out of the water tank 11.

In particular, the oil 13 has a higher viscosity and adhesive force than the water 12 and has a property of sticking to the scraping groove 19.
Since the water 12 easily flows down from the side of the rotating plate 15, the rotating plate 15
The mixture of the oil 13 and the water 12 raked out by the spring-out action of the rake-out groove 19 has a high oil concentration.

The mixed liquid of oil and water scraped by the scraping groove 19 of the rotating plate 15 collides with the inner peripheral wall surface of the casing 17 and flows down to the chute 18.
Accordingly, the oil / water is guided to the oil / water separator 21 outside the casing, and the oil / water is efficiently separated from the oil / water mixture by the oil / water separator 21.

That is, in the oil / water separator 21, the first chamber 22 of the plurality of chambers 22, 23, 24 with the lower part communicating with each other
When the oil 13 is almost filled, the oil 13 flows into the next chamber 23 through the lower opening 25 and floats, and the oil discharge pipe
The oil overflowing to the upper end opening of 27 is automatically discharged to an external oil receiving container 29 by an oil discharge pipe 27.

On the other hand, the most downstream chamber 24 has a lower opening 26.
Only the water 12 that has passed through the reservoir pools, and the water that has overflowed to the upper end opening of the water return pipe 28 in the chamber 24 is automatically returned to the water tank 11 through the water return pipe 28.

As described above, the present oil / water separation device is provided with the rotary plate 15
The oil and water can be scraped out by the rotation of the oil and the oil and water can be efficiently separated and collected by the oil-water separator 21, so that the floating oil in the cutting water tank of a machine tool or the like is removed only by performing daily cleaning. The removal ability can be maintained.

Next, in the above embodiment, the water 12
The oil-water separator that separates the oil 13 having a specific gravity smaller than 12 has been described.This oil-water separator has one liquid not limited to the water 12 and the oil 13 and another liquid having a specific gravity smaller than the one liquid. The present invention can also be applied to a liquid separation device that separates a liquid. Less than,
The description will be made using the reference numerals of the oil-water separation device shown in FIGS. 1 and 2.

That is, the liquid separating apparatus includes a liquid tank containing one liquid (corresponding to the water tank 11) and a liquid surface on which another liquid having a lower specific gravity than the one liquid floats in the liquid tank. The rotating plate 15 which is rotated upward with the lower part immersed in the lower surface, a scraping groove 19 provided on the rotating plate 15 and inserted into a liquid surface on which another liquid is floating, and the scraping groove 19 A two-liquid separator (oil / water separator 21) that separates one liquid scraped from the liquid tank and the other liquid
).

The mixed liquid of one liquid and the other liquid scraped by the scraping groove 19 of the rotating plate 15 has a high concentration of the other liquid. Can be efficiently separated by the two-liquid separator. In addition, one liquid and another liquid are scraped out by the rotation of the rotary plate 15, and the one liquid and the other liquid are separated by the two-liquid separator. Can be maintained.

[0031]

According to the first aspect of the present invention, the mixture of one liquid and the other liquid scraped by the scraping groove of the rotating plate has a high concentration of the other liquid. One liquid and the other liquid can be efficiently separated by the two-liquid separator. In addition, one liquid and the other liquid are scraped out by the rotation of the rotating plate, and the one liquid and the other liquid are separated by the two-liquid separator. Therefore, the liquid separation ability is maintained only by performing daily cleaning. it can.

According to the second aspect of the present invention, since the mixture of oil and water scraped by the scraping grooves of the rotary plate has a high oil concentration, the oil and water are separated from the oil water by an oil-water separator. Can be separated more efficiently. Further, the oil and water is scraped out by the rotation of the rotating plate, and the oil and water are separated by the oil-water separator, so that the oil removing ability can be maintained only by performing daily cleaning.

According to the third aspect of the present invention, the oil-rich water can be efficiently scraped out of the water tank by the plurality of radially provided scraping grooves.

According to the fourth aspect of the present invention, the oil overflowing from the upstream chamber, in which the oil floats, to the oil discharge pipe can be automatically discharged to the outside from among the plurality of chambers communicating with the lower portion. In addition, water overflowing from the downstream chamber where only water is stored to the water return pipe can be automatically returned to the water tank.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an oil-water separation device according to the present invention.

FIG. 2 is a perspective view of the oil-water separator.

[Explanation of symbols]

 11 Water tank 12 Water 13 Oil 15 Rotating plate 19 Rake groove 21 Oil / water separator 22, 23, 24 Multiple chambers 27 Oil discharge pipe 28 Water return pipe

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Kishi 4-10-1, Yoga, Setagaya-ku, Tokyo New Caterpillar Mitsubishi Corporation F-term (reference) 4D051 AA01 AB02 BA03 BA09 DA03 DA08 DA11 DA20

Claims (4)

[Claims] 1. A liquid tank containing one liquid, and a rotation in which a lower part is immersed in a liquid surface in which another liquid having a lower specific gravity than the one liquid floats in the liquid tank, and is rotated upward. A plate, a scraping groove provided on the rotating plate and inserted into a liquid surface on which another liquid is floating, and a liquid and another liquid scraped out of the liquid tank by the scraping groove. A liquid separation device comprising: a two-liquid separator for separating. 2. A water tank containing oil-mixed water, a rotating plate that is rotated upward with a lower part immersed in a water surface in which oil is floating in the water tank, and a rotating plate provided on the rotating plate. An oil / water separator comprising: a rake groove inserted into a surface of a surface on which oil is floating; and an oil / water separator for separating oil and water raked from the inside of the water tank by the rake groove. . 3. A plurality of scraping grooves are provided radially on at least one side surface of the rotating plate.
An oil-water separator according to claim 1. 4. An oil-water separator, comprising: a plurality of chambers each having a lower part communicated therewith; an oil discharge pipe drawn out from an upstream chamber to the outside; and a water return pipe communicated from a downstream chamber into the water tank. The oil-water separation device according to claim 2 or 3, further comprising: