KR20210023279A - Apparatus for separating oil-water - Google Patents

Abstract

The present invention relates to an oil-water separation device for a machine tool configured to separate cutting oil and sliding oil from a cutting oil mixture. According to the present invention, the -water separation device for a machine tool can integrally comprise: a main body in which an intake filter and a discharge filter are installed; a separator disposed on an upper portion of the main body and having a first chamber, a second chamber, a third chamber and an oil chamber partitioned by first, second, and third partition walls having different heights; a suction pump installed in the main body and supplying a cutting oil mixture containing sliding oil that has passed through a suction filter to the first chamber; a refining unit disposed on a lower part of the main body, and having a cutting oil storage chamber receiving cutting oil separated from the cutting oil mixture through a discharge unit provided in a sole valve and a third valve disposed under the second chamber, wherein a filtration filter is provided upstream of the cutting oil storage chamber; a discharge pump installed in the main body to connect the cutting oil storage chamber and the discharge filter; and a skimmer unit disposed at an upper end of the third partition wall dividing the third chamber and the oil chamber and guiding the sliding oil floating on the cutting oil in the third chamber to the oil chamber.

Description

Machine tool oil-water separation device {Apparatus for separating oil-water}

The present invention relates to an oil-water separation device for a machine tool, and more particularly, to a separation device capable of separating cutting oil and sliding oil from a cutting oil mixture.

In general, cutting machine tools such as Maching Center (MCT) and CNC (Computerized Numerical Control) lathes are used to cool the workpiece, tool, or workpiece during cutting, and to remove fine chips remaining on the machining surface of the workpiece. It is used while supplying slideway oil for smooth operation of the machine together with cutting oil.

Cutting oil is composed of a water-soluble cutting oil in the form of an emulsion containing a small amount of oil in a large amount of water by diluting it in water, for example, 20 to 40 times by adding an emulsifier during use. Sliding oil is made of oil that is insoluble in water and prevents stick-slip and abrasion.

The machine tool discharges the cutting oil mixture while mixing the sliding oil with the cutting oil during cutting as described above. The (oil-based) sliding oil is suspended above the (water-soluble component) cutting oil, which blocks oxygen supply to the cutting oil, which promotes decay of the cutting oil and generates a severe odor. In addition, decaying cutting oil will shorten the service life of the machine tool when reused.

In order to solve this problem, Patent Document 1 discloses an oil-water separator-integrated cutting oil refining apparatus capable of separating sliding oil and cutting oil by using a difference in specific gravity. Patent Document 1 is divided into a cutting oil layer and a sliding oil layer in a third tank, and the sliding oil in the sliding oil layer is discharged to the outside through a valve. In the case of discharging the sliding oil through the opening of the valve, when the interface between the sliding oil layer and the cutting oil layer is positioned lower than the installation height of the valve, Patent Document 1 has a limit to effectively prevent the withdrawal of cutting oil through the open valve. Have.

For reference, Patent Document 1 is filed on April 6, 2012 by the same applicant of the present invention, the contents of which may be incorporated by reference into the detailed description of the present invention.

Korean Patent Publication No. 10-1331286

The present invention has been created to solve the above-described problem, and an object of the present invention is to provide a cutting oil separation device capable of separating cutting oil and sliding oil from a cutting oil mixture.

In addition, the present invention is to integrally provide a skimmer that can be removed by separately drawing and removing only the selected sliding oil by floating above the cutting oil due to the difference in specific gravity.

In order to achieve the above object, an oil-water separation device for a machine tool according to a preferred embodiment of the present invention includes a main body having a suction filter and an exhaust filter installed; A separator disposed on the body portion and having a first chamber, a second chamber, a third chamber, and an oil chamber partitioned by first, second, and third partition walls having different heights; A suction pump installed in the main body and supplying a cutting oil mixture (mixed composition of sliding oil and cutting oil) passed through a suction filter to the first chamber; A cutting oil storage chamber disposed below the main body and receiving cutting oil separated from the cutting oil mixture through a sol valve disposed below the second chamber and a discharge unit provided in the third chamber, and a filtration filter upstream of the cutting oil storage chamber A purification unit having a; A discharge pump installed in the main body and connecting the cutting oil storage chamber and the discharge filter; A skimmer unit disposed at the upper end of the third partition wall that divides the third chamber and the oil chamber, and collecting only the sliding oil floating on the cutting oil in the third chamber and guiding it to the oil chamber; may be integrally included.

Preferably, the skimmer portion comprises a loop-shaped tube; A driving unit that rotates the tube in one direction so as to be drawn in through the inlet and drawn out through the outlet; A scraper installed at the front end of the inlet and scraping off the sliding oil adhered to the outer circumferential surface of the tube; And an outflow path for guiding the sliding oil to the oil chamber.

In the embodiment of the present invention, the tube is made of a hollow tube, and the inside of the tube may contain a fluid having a specific gravity higher than that of the sliding oil.

In addition, the fluid contained in the tube may have a specific gravity lower than that of the cutting oil.

Optionally, the scraper may further comprise a heater.

In an embodiment of the present invention, the discharge unit includes a first pipe that is supplied with cutting oil to the lower portion of the cutting oil mixture that overflows in the second chamber, and is connected to the first pipe from the upper portion and extends to the cutting oil storage chamber to discharge the cutting oil. While having two pipes, an opening may be formed at an upper end of the second pipe.

In addition, according to the present invention, a lower flow path may be formed in the first partition wall partitioning the first chamber and the second chamber, and a valve may be provided in the third partition wall to help discharge the sliding oil of the third chamber into the oil chamber.

Features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be interpreted in a conventional and dictionary meaning, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

According to the above description of the present invention, the present invention can be installed in a narrow space by means of an integrated oil-water branch, and thereby, it is possible to comfortably improve the workplace environment through cleanliness inside the factory. In addition, in the present invention, by using a separation unit, a purification unit, and a skimmer unit, the sliding oil that causes decay from the cutting oil mixture is completely removed and purified and extracted with high-quality cutting oil, thereby easily solving the problem caused by cutting oil decay.

The present invention can be extracted so that expensive cutting oil can be maintained in a reusable state for a long time.

Therefore, since no waste oil is generated, environmental pollution can be prevented, and the service life of the cutting machine tool can be extended by removing various foreign substances, metal abrasion powder, and cutting chips. In addition, the surface roughness is improved, so that the processing performance and processing precision can be kept constant.

In addition, according to the present invention, it is possible to easily separate the sliding oil floating on the surface of the cutting oil from the cutting oil through the skimmer and improve the purity of the cutting oil to be reused.

1 is a cross-sectional view as viewed from the front of an oil-water separation device for a machine tool according to a preferred embodiment of the present invention.
2 is a cross-sectional view of an oil-water separation device for a machine tool according to a preferred embodiment of the present invention as viewed from the rear.
3 is a cross-sectional view as viewed from one side of an oil-water separation device for a machine tool according to a preferred embodiment of the present invention.
Figure 4 is a cross-sectional view schematically showing a discharge unit employed in the oil-water separation device for a machine tool according to the present invention.
5 is an exploded perspective view schematically showing a skimmer portion employed in an oil-water separation device for a machine tool according to the present invention.
6 is an exploded view schematically illustrating a coupling relationship between components in an oil-water separation device for a machine tool according to a preferred embodiment of the present invention.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and embodiments in connection with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In the present specification, terms such as first and second are used to distinguish one component from other components, and the component is not limited by the terms. In the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated, and the size of each component does not entirely reflect the actual size.

1 to 3, a machine tool oil-water separation device according to a preferred embodiment of the present invention comprises a main body part 1, a separation part 2, a refining part 3, and a skimmer part 4. Includes.

The main body 1 includes a suction filter 10 and a discharge filter 11 connected to a storage tank (not shown) for storing cutting oil, and a suction pump 13 and a discharge pump respectively connected thereto and installed in the main body 1. 14).

Specifically, the present invention is installed on the upper portion of the main body (1) to receive the cutting oil mixture used in the cutting process of the machine tool through the suction pump (13) and separate it by a natural fall method, and the sliding oil through the difference in specific gravity. Separation unit (2) separating the cutting oil and the separation unit (2) is installed in the lower portion of the main body (1) to filter the cutting oil separated from the cutting oil mixture through the separation unit (2), and the separation unit (2) It includes a skimmer unit 4 (skimmer) that separately collects the sliding oil floating on the cutting oil in the inside. Here, the cutting oil mixture refers to a fluid mixture including cutting oil and sliding oil during metal processing.

As shown, the separating part 2 includes a first chamber 20, a second chamber 21, and a third chamber 22 partitioned by partition walls 20a, 20a', 20a" having different heights. ) Is formed therein, and the oil chambers 23 are arranged sequentially or in a row separately from the first, second, and third chambers.

The first partition wall 20a divides the first chamber 20 and the second chamber 21 to be supplied with the cutting oil mixture, and the lower part helps to make the first chamber 20 and the second chamber 21 in fluid communication with each other. A flow path 21a is formed.

The second partition wall 20a' partitions the second chamber 21 and the third chamber 22, and as shown, the height of the second partition wall 20a' is lower than the height of the first partition wall 20a.

The third partition wall 20a" partitions the third chamber 22 and the oil chamber 23, and has a valve 23a at the top to help discharge the sliding oil floating in the third chamber 22 to the outside. The height of the second partition wall 20a', preferably, extends higher than the first partition wall 20a. In particular, in the present invention, the skimmer part 4 is disposed at the upper end of the third partition wall 20a". The skimmer unit 4 has a tube 41 disposed downwardly toward the inner space of the third chamber 22 and an outlet path 44 inclined toward the oil chamber 23.

On the other hand, the oil-water separation device for machine tools according to the present invention is the second chamber 21 of the separation unit 2 to discharge the cutting oil separated into the lower layer of each chamber due to the specific gravity difference in the cutting oil mixture to the purification unit 3 The cutting oil contained in the coolant mixture (or separated from the second chamber) is provided with a sol valve 24 at the bottom and flows over the second partition wall 20a' and transferred from the second chamber 21 to the third chamber 22. It includes a discharge unit 25 to discharge the cutting oil contained in a small amount of the sliding oil) to the refining unit (3).

As shown in FIG. 4, the discharge unit 25 is a first pipe ( 25a) and a second pipe 25b that is connected to the first pipe 25a from the top and discharges the cutting oil to the bottom.

In the oil-water separation device for machine tools according to a preferred embodiment of the present invention, as shown in FIG. 6, after filtering the sludge with the suction filter 10, the first of the separating part 2 installed on the upper part of the main body 1 The sliding oil separated into the upper layers of the chamber 20, the second chamber 21, and the third chamber 23 is transferred to the downstream facility through a natural fall method.After this sliding oil separation process, the skimmer unit 4 The sliding oil is collected in the oil chamber 23 by using. In addition, the cutting oil from which the sliding oil is separated is separated into the lower layer of each chamber and dropped into the cutting oil storage chamber 30 through the soll valve 24 and the discharge unit 25 to remove various foreign substances, and then purify through the discharge filter 11. It is resupplied to the coolant storage tank.

Hereinafter, with reference to the accompanying drawings according to a preferred embodiment of the present invention will be described in more detail.

The main body 1 is formed in a box shape with a caster attached to the bottom surface, the suction filter 10 and the discharge filter 11 are installed on the rear surface, and the suction filter 10 and the first chamber 20 are installed at the bottom of the inner side. ) And a suction pump (13) connected through a hose (12) is installed, a discharge filter (11) next to the suction pump (13) and a discharge pump (14) connected through a cutting oil storage chamber (30) and a hose (12) Are installed side by side. On the upper side of the main body 1, a substrate 1a in which various switches are arranged is disposed.

The separating part 2 is disposed on the inner upper side of the main body 1, and using the partition walls 20a, 20a', 20a" having different heights, the first chamber 20, the second chamber 21, Separated and partitioned into a third chamber 22 and an oil chamber 23. A part of the cutting oil mixture supplied and filled to the first chamber overflows the first partition wall 20a and can naturally fall into the second chamber. 2 The partition wall 20a' is designed to be lower than the height of the first partition wall 20a. In addition, the first partition wall 20a forms a lower flow path 21a adjacent to the lower end, and the third partition wall 20a" A valve (23a) is installed adjacent to the upper end of the skimmer part (4) at the upper end. Here, the valve 23a may be disposed at a position lower than the upper end of the second partition wall 20a'.

In addition, in the present invention, a drain valve 26 is additionally installed so that the sliding oil collected in the oil chamber 23 can be discharged to the outside through the skimmer unit 4 and/or the valve 23a.

The first chamber 20 includes a water level switch 20b electrically connected to the suction pump 13 to control the operation of the suction pump 13 according to the water level of the first chamber. The water level switch 20b is also provided in the coolant storage chamber 30 and is electrically connected to the discharge pump 14 to control the driving of the discharge pump 14 according to the level of the coolant.

The second chamber 21 has a sol valve 24 installed in the lower part to discharge the cutting oil located under the second chamber (lower layer) to the cutting oil storage chamber 30 because the specific gravity of the cutting oil mixture is high, and the third chamber ( 22) is provided with a discharge unit 25 to discharge the cutting oil located below the third chamber (lower layer) to the cutting oil storage chamber 30 due to a high specific gravity among the cutting oil mixture that has overflowed the second partition wall 20a'.

As shown in FIG. 4, the discharge unit 25 is disposed in the third chamber 22. Specifically, the discharge unit 25 interconnects the upper side of the first pipe 25a and the upper side of the second pipe 25b in fluid communication. The second pipe 25b is relatively longer than the first pipe, so that the lower end of the second pipe can be drawn out to the lower portion of the separating unit 2 to guide the cutting oil to the cutting oil storage chamber 30. In addition, the discharge unit 25 forms an opening 25c at the upper end of the second pipe so as to provide air to the inner pipe to prevent a pipe clogging phenomenon in advance. In the second pipe, the upper end of the second pipe is disposed higher than the upper end of the second partition wall 20a' in order to prevent unnecessary inflow of the sliding oil through the opening.

In the present invention, as shown, the purification unit 3 is disposed below the inner side of the main body 1, specifically below the separating unit 2, wherein the purification unit 3 is disposed upstream of the cutting oil storage chamber 30. By means of the filtration filter 31, a small amount of sliding oil and other foreign matter mixed with the cutting oil supplied through the sol valve 24 and the second pipe 25b of the discharge unit 25 may be removed.

In the present invention, the skimmer part 4 is disposed at the upper end of the third partition wall 20a" in order to separate the sliding oil floating on the upper part of the third chamber without being mixed with the cutting oil sinking in the lower part of the chamber. In the following, the skimmer unit 4 may be made of a tube skimmer.

The skimmer unit 4 includes a loop-type tube 41, a drive unit 42 that helps the tube 41 to rotate in one direction, and a scraper 43 for scraping the sliding oil adhered to the outer circumferential surface of the tube 41; scraper), and an outflow path 44 for guiding the sliding oil separated from the tube to a downstream facility. As shown, the skimmer unit is configured to rotate the tube 31 in one direction so that the sliding oil floating on the upper layer of the third chamber 22 sticks to the outer circumferential surface of the tube. The tube 41 rotates in one direction as described above so that it is interlocked with the drive of the drive unit 42 and is drawn into the inlet 42a and drawn out through the outlet 42b. The drive unit 42 may arrange a tube between the two cogwheels and rotate the tube in one direction depending on the rotation of the cogwheel, but is not limited thereto, and any method capable of rotating the tube may be used. Accordingly, in the present invention, specific technology for the drive unit is excluded.

As shown, the tube 41 is disposed downward toward the inner space of the third chamber 22 so that a part of the tube (near the lower inflection point) can contact the sliding oil. The skimmer part 4 removes the sliding oil from the outer circumferential surface of the tube by contacting the scraper 43 disposed at the front end side of the inlet 42a in the process of pulling up the tube adhered to the sliding oil by driving the driving unit 42. The scraper is formed in a ring shape and can reliably remove the sliding oil adhered to the outer circumferential surface of the hollow tube type tube. The removed sliding oil is guided to the oil chamber along the outlet path 44 inclined downward toward the oil chamber 23.

In addition, the tube 41 may be made of a resin material having flexible and chemical resistance, and the tube may be of a hollow tube type. In order for the hollow tube 41 to ensure reliable contact with the sliding oil, a fluid having a higher specific gravity than that of the sliding oil (F; colored in gray) may be accommodated inside the tube. The fluid acts as a weight on the tube, so that the tube does not float on the sliding oil phase, and a portion of the tube is immersed so as to settle in the sliding oil layer 22b to provide a sufficient opportunity for contact between the tube and the sliding oil. Optionally, in the present invention, the specific gravity of the fluid to be accommodated in the tube is higher than the specific gravity of the sliding oil and lower than the specific gravity of the cutting oil, so that the contact opportunity between the tube and the cutting oil may be blocked.

Optionally, the skimmer part 4 comprises a scraper 43 with a heater 45. The scraper 43 heated by the heater 45 can reduce the viscosity of the sliding oil when it comes into contact with the sliding oil adhered to the outer circumferential surface of the tube, so that it can flow downward more effectively, that is, to the outflow path 44.

Hereinafter, an operation sequence of separating the sliding oil from the cutting oil mixture and purifying the cutting oil through the oil-water separation device for a machine tool according to a preferred embodiment of the present invention will be described with reference to FIG. 6.

First, when the suction pump 13 is operated, the cutting oil mixture that has passed through the suction filter 10 is supplied to the third chamber 22 through the first chamber 20 and the second chamber 21. The first chamber 20 and the second chamber 21 are partitioned by a first partition wall 20a, and the first chamber and the second chamber are in communication with each other by the lower flow path 21a of the first partition wall, so that the suction pump ( When the pumping of 13) is stopped, the water level gradually becomes the same, and the sliding oil located above the second chamber 21 naturally overflows to the third chamber 22. As known to those skilled in the art, the sliding oil having a low specific gravity floats on the surface of the cutting oil having a high specific gravity, and the separation process by the difference in specific gravity can be performed in each chamber.

In the first chamber and the second chamber, the cutting oil that is separated from the sliding oil by sinking under each chamber is discharged to the cutting oil storage chamber 30 by opening the sole valve 24. Of course, the sliding oil floats above each chamber.

If the cutting oil mixture is supplied to the third chamber through the first chamber and the second chamber, the present invention provides more than 98% of the cutting oil separated into the second chamber and/or the lower layer of the third chamber while passing through the filtration filter 31. By removing various foreign substances such as sludge, high-purity cutting oil can be stored in the cutting oil storage chamber 30. The coolant stored in the coolant storage chamber 30 is supplied to the coolant storage tank again through the discharge filter 11 through the discharge pump 14 and will be recycled.

In the third chamber 22, as described above, due to the difference in specific gravity, the sliding oil floats on the cutting oil, and is separated and laminated into the cutting oil layer 22a and the sliding oil layer 22b. The sliding oil layer 22b made of sliding oil flowing through the first chamber 20 and the second chamber 21 and flowing into the third chamber is sent to the downstream oil chamber 23 through the operation of the skimmer unit 4 and collected. Then, it is discharged to the outside through the drain valve 26.

When the cutting oil mixture is supplied in excess of the amount of removal of the sliding oil for the skimmer unit 4, the valve 23a is opened to quickly discharge the sliding oil located in the upper portion of the third chamber downstream.

The present invention has been described in detail through examples, but this is for explaining the present invention in detail, and the oil-water separation apparatus for a machine tool according to the present invention is not limited thereto, and within the technical idea of the present invention, It will be said that it is clear that the transformation or improvement is possible by those who have the knowledge of.

All simple modifications to changes of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1 ----- main body,
10 ---- Intake filter, 11 ----- Discharge filter,
13 ----- suction pump, 14 ----- discharge pump,
2 ----- separating part,
20 ----- 1st chamber, 21 ----- 2nd chamber,
22 ----- 3rd chamber, 23 ----- oil chamber,
24 ----- Sol valve, 25 ----- Discharge unit,
3 ----- refining unit,
30 ----- Coolant storage chamber, 31 ----- Filtration filter,
4 ----- Skimmer part,
41 ----- tube, 42 ----- drive unit,
43 ----- scraper, `44 ----- spill furnace,
45 ----- Heater.

Claims (7)

A main body 1 provided with a suction filter and a discharge filter;
The first chamber 20, the second chamber 21, and the third chamber 22 are disposed above the main body 1 and are divided into partition walls 20a, 20a', 20a" having different heights. ) And a separator (2) having an oil chamber (23);
A suction pump (13) installed in the main body (1) and supplying a cutting oil mixture containing sliding oil that has passed through the suction filter to the first chamber (20);
In the cutting oil mixture through the sole valve 24 disposed under the main body 1 and disposed under the second chamber 21 and the discharge unit 25 provided in the third valve 22 A purification unit 3 having a cutting oil storage chamber 30 receiving the separated cutting oil and a filtration filter 31 upstream of the cutting oil storage chamber 30;
A discharge pump (14) installed in the main body (1) and connecting the cutting oil storage chamber (30) and the discharge filter;
It is disposed at the upper end of the third partition wall 20a" partitioning the third chamber 22 and the oil chamber 23, and the sliding oil floating on the cutting oil in the third chamber 22 is transferred to the oil chamber 23 ) To guide the skimmer portion (4); including integrally, oil-water separation device for machine tools. The method according to claim 1,
The skimmer part 4,
A loop-shaped tube 41;
A drive unit 42 for rotating the tube in one direction so that it can be drawn in through the inlet 42a and drawn out through the outlet 42b;
A scraper 43 installed at the front end of the inlet 42a and scraping off the sliding oil adhered to the outer circumferential surface of the tube; And
Having an outlet path 44 for guiding the sliding oil to the oil chamber 23, an oil-water separation device for a machine tool. The method according to claim 2,
The tube 41 is made of a hollow tube that is hollow,
A fluid (F) having a specific gravity higher than that of the sliding oil is accommodated in the tube. The method of claim 3,
The fluid (F) accommodated in the tube (41) has a specific gravity lower than the specific gravity of the cutting oil, machine tool oil-water separation device. The method according to claim 2,
The scraper 43 further comprises a heater 45, oil-water separation device for machine tools. The method according to claim 1,
The discharge unit 25 includes a first pipe 25a receiving cutting oil from the cutting oil mixture flowing in the second chamber to the lower side, and the cutting oil storage chamber 30 connected from the top to the first pipe 25a. It is provided with a second pipe (25b) for discharging the cutting oil by extending the length of the furnace,
An oil-water separation device for a machine tool, wherein an opening 25c is formed at an upper end of the second pipe. The method according to claim 1,
The first partition wall 20a partitioning the first chamber 20 and the second chamber 21 forms a lower flow path 21a,
The third partition wall (20a") is provided with a valve (23a) for discharging the sliding oil of the third chamber to the oil chamber (23), machine tool oil-water separation device.

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