JPH04193306A - Recovery apparatus for floating oil or floating sludge - Google Patents

Abstract

PURPOSE:To maintain the recovery rate of oil and sludge at a high level by lowering a intake liquid level connected to a lower part of a guide member by discharging a working solution in inside of the guide member from the guide member when oil or sludge is recovered. CONSTITUTION:Since a suction pump 12 is worked on recovery, the working solution 1 in the guide member 2 is sucked with the suction pump 12 and is discharged. Then the intake liquid face B of the working solution 1 lowers and a float 5 floating in the intake member 3 slides in the down direction at the inside of the guide member 2 together with the intake member 3. By adjusting a suction force of the suction pump 12, as the intake port 10 is positioned at a slightly lower level than a liquid face A of a storage tank, the oil 8 or the sludge 9 floating on the working solution flows into the intake port 10. Since the position where the sludge 9, etc., stick on the outer surface of the intake member 3, changes frequently, sludge, etc., do not stick and the stuck sludge, etc., are easily striped off with the up and down positions.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to a floating oil or sludge for recovering oil or sludge floating on the surface of a machining fluid such as a water-soluble polishing fluid or cutting oil used in a machine tool. This invention relates to a floating sludge recovery device.

[Prior Art] Generally, sludge such as metal powder, metal oxide powder, inorganic powder, carbon powder, etc. is mixed into machining fluids such as water-soluble polishing fluids and cutting oils used in machine tools during machining. These sludges often need to be recovered for purposes such as purification of the processing fluid for reuse and prevention of environmental pollution. Furthermore, if the water-soluble polishing fluid and cutting oil are not separated from the used machining fluid, the performance of the machining fluid will deteriorate significantly, which will have a negative effect on the machining accuracy of the product. Furthermore, the frequency of updating the machining fluid inevitably increases.

Therefore, many methods have been developed for separating oil and recovering sludge through physical treatments such as screening, sedimentation, flotation, chemical treatments such as flocculation, and other treatments.

FIG. 5 shows a conventional example of a recovery device for floating oil or floating sludge used in the above-mentioned physical treatment by flotation. This recovery device collects oil 8 floating in the stored machining fluid 1.
Alternatively, a cylindrical intake member 43 with an intake port 44 opening at the top for taking in the sludge 9, a cylindrical guide member 45 that supports the intake member 43 so as to be slidable in the vertical direction; It is attached to multiple locations around the intake member 43, and the intake member 43 is floated in the machining fluid 1 by buoyancy, so that the intake port 44 is connected to the level of the stored machining fluid 1 (hereinafter referred to as "reserved fluid"). Side A
That's what it means. ) Float 4 located at a slightly lower level than
6, and is connected to the lower part of the guide member 45, and is connected to the intake port 44.
It consists of a suction pump 12 that sucks oil 8 and sludge 9 flowing into the guide member 45 from the inside and sends it to a recovery tank 13.

According to this recovery device, even if the level of the machining liquid 1 rises or falls, the intake member 43 follows due to the buoyancy of the float 46, so the intake port 44 is located at a level slightly below the level of the stored liquid A. The oil 8 floating on the stored liquid level A is maintained at a position of
The sludge 9 is efficiently taken in and recovered from the intake port 44.

[Problem B to be Solved by the Invention] However, since the level of the water line on the outer surface of the float 46 where the stored liquid level A of the machining fluid 1 is located is always the same, the water on the outer surface of the float 1 will increase when used for a long period of time. Sludge 9 etc. adheres to the position of the line and sticks, and the sludge 9
etc. are added to the float 46. Then, the float 46 and the intake member 43 sink somewhat deeply into the machining fluid 1, and the position of the intake port 44 becomes lower than the level at which it was held. Therefore, this intake port 44 does not take in much of the oil 8 and sludge 9 that are concentrated near the pooled liquid level A of the working fluid 1, but instead takes in the polishing fluid with a high moisture content. There was a problem that the recovery rate of sludge 9 and sludge 9 decreased.

The purpose of the present invention is to solve the above-mentioned problems by locating the intake port at a level slightly below the level of the stored machining fluid where floating oil and sludge are concentrated, and by preventing sludge from adhering to the intake member. It is an object of the present invention to provide a recovery device for floating oil or floating sludge, which can maintain the position of the intake port by preventing the above-mentioned problems, thereby maintaining a high recovery rate of the oil or sludge.

[Means for Solving the Problems] In order to achieve the above object, the floating oil or floating sludge recovery device according to claim 1 collects the oil or sludge floating on the surface of the stored processing liquid during the processing. a cylindrical intake member with an intake port opened at the top to take in the liquid; and a cylindrical guide member that is disposed in the machining fluid and supports the intake member slidably in the vertical direction. is attached to the intake member, and floats together with the intake member on the intake liquid surface of the machining fluid taken into the inside of the guide member, and when the oil or sludge is not collected, the intake port is A float positioned above the level of the stored liquid is connected to a lower part of the guide member, and when recovering the oil or sludge, drains the machining liquid inside the guide member from the guide member to lower the level of the taken-in liquid. and a suction pump that slides the intake member downward and positions the intake port at a level slightly below the level of the stored liquid.

The floating oil or floating sludge recovery device according to claim 2,
The intake port was formed in a wavy shape undulating in the vertical direction.

Here, examples of the "wavy shape" include a triangular wave shape, a rectangular wave shape, a sine wave shape, and the like.

[Function] The floating oil or floating sludge recovery device according to claim 1 has the following effects.

Furthermore, since the suction pump is not operated during non-collection, machining fluid is gradually taken into the guide member. Therefore, the level of the machining fluid taken in is approximately the same level as the stored liquid level, and the float floats on the taken-in liquid level together with the intake member.
The intake port is located above the level of the stored liquid.

Next, at the time of recovery, the suction pump is operated, so that the machining liquid inside the guide member is sucked and discharged by the suction pump. Therefore, the level of the machining fluid taken in falls, and the float floating on the intake member slides downward inside the guide member together with the intake member. By adjusting the suction force of the suction pump, the intake port is positioned at a level slightly below the level of the stored liquid, and the oil and sludge floating in the machining fluid are taken in through the intake port along with the machining fluid. Flows into the parts.

In this way, when transitioning from the non-recovery state to the retrieval state and vice versa, the flow I and the intake member move up and down, so that the level of the stored machining fluid increases with respect to the outer surface of the intake member. The level of the water line where it is located also changes up and down at the same time. In other words, the position where sludge etc. adheres to the outer surface of this intake member changes frequently, so sludge etc. does not stick to one place on the outer surface as in the past, and the attached sludge etc. moves upward and downward. It peels off easily.

According to the floating oil or floating sludge recovery device according to the second aspect, in addition to the above-mentioned effect, since the intake port is formed in a wavy shape that waves in the vertical direction, the surface tension of the oil or sludge is easily broken. Therefore, this oil and sludge flow smoothly into the intake member along with the machining fluid mainly from the troughs of the waves in the intake port.

[Embodiments] Hereinafter, embodiments embodying the oil or sludge recovery apparatus of the present invention will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the machining fluid 1 stored in the storage tank 16
A guide member 2 fixed to the storage tank 16 is disposed inside the tank. This guide member 2 is formed into a bottomed cylindrical shape with an open top.

A cylindrical intake member 3 whose upper and lower parts are open is supported in the guide member 2 so as to be slidable in the vertical direction. A gap 15 of 1 to 2 mm is provided between the outer circumference of the intake member 3 and the inner circumference of the guide member 2, so that the machining fluid 1 is gradually introduced into the guide member 2 through the gap 15. It has become.

The upper end peripheral edge 7 of this intake member 3 is formed in a triangular wave shape in which peaks 7a and troughs 7b are alternately continuous.

A cylindrical float 5 having a hollow interior is coaxially attached to the intake member 3 via a plurality of support members 4, and the float 5 is attached to the guide member 3 together with the intake member 3. It floats on the intake liquid level B of the machining fluid 1 inside. A space between the outer peripheral surface of the float 5 and the upper end peripheral edge 7 is an intake port 10 for taking in the oil 8 and sludge 9 floating on the stored liquid level A of the working fluid 1.

Further, between the outer peripheral surface of the float 5 and the inner peripheral surface of the intake member 3 is an annular passage 6 communicating with the intake port 10, and oil 8, sludge 9, etc. pass through the annular passage 6. do.

Further, a suction pipe 11 is provided at the lower part of the guide member 2 to send oil 8 and sludge 9 flowing into the guide member 2 from the annular passage 6 to a collection tank 13. An on-off valve 14 and a known suction pump 12 capable of adjusting the suction force are provided in the middle of the suction pipe 11. This suction pump 12 operates at the time of collection, and the guide member 2
The machining fluid 1 accumulated inside the tank is sucked and discharged into the recovery tank 13, the intake liquid level B is lowered, and the oil 8 and sludge 9 are forcibly sent to the recovery tank 13. There is.

Next, the operation of the oil or sludge recovery device configured as described above will be explained.

(1) First, since the suction pump 12 is not operated during non-collection, the machining fluid 1 is gradually taken into the guide member 2. Therefore, as shown in FIG. 2, the intake liquid level B of this machining fluid is at approximately the same level as the stored liquid level A, and the float 5 floats on the intake liquid level B together with the intake member 3.
The intake port 10 is located above the reservoir liquid level A.

(2) Next, since the suction pump 12 is operated during recovery, the machining liquid 1 inside the guide member 2 is absorbed by the suction pump 12.
It is sucked in and discharged. Therefore, this processing fluid 1
The intake liquid level B of falls, the float 5 floating on the intake member 3 descends together with the intake member 3, and the intake member 3 slides downward inside the guide member 2. And suction pump 12
By adjusting the suction force of the inlet 10, the triangular wave-shaped peaks 7a of the intake port 10 are positioned above the stored liquid level A of the machining fluid 1, and the troughs 7b are located at a slightly lower level. . Then, oil 8 and sludge 9 floating in the machining fluid 1
is mainly concentrated near the pooled liquid level A of machining fluid 1, so
The intake port 10 efficiently takes in the highly concentrated machining fluid 1 such as the oil 8.

In this way, the float 5 and the intake member 3 move up and down when transitioning from the non-recovery time to the recovery time and vice versa, so that the stored liquid of the machining fluid 1 is moved against the outer surface of the intake member 3. The level of the water line where surface B is located also changes up and down at the same time. That is, since the position where the sludge 9 etc. adheres to the outer surface of the intake member 3 changes frequently, the sludge 9 etc. does not stick to one place on the outer surface as in the conventional case, and the attached sludge 9 etc. It peels off easily along with the above and below.

Further, since the intake port 10 is formed in a wave shape that waves in the vertical direction, the surface tension of the oil 8 and the sludge 9 is easily broken. Therefore, the oil 8 and sludge 9 smoothly flow into the intake member 3 together with the machining fluid 1 mainly through the wave troughs 7b of the intake port 10. Therefore, a large amount of machining fluid 1, etc. flows into the intake port 10 at once, which disturbs the intake state, and the position of the intake port 10 of the intake member 3 moves up and down, causing a large amount of air to be sucked in, oil 8 and sludge. It is possible to prevent a portion of the machining fluid 1 below the low concentration stored fluid level A from being taken in.

(3) Next, the taken-in machining fluid 1 containing the oil 8 and sludge 9 flows into the lower part of the guide member 2, and is then sent to the collection tank 13 through the suction pipe 11.

(4) Next, the processing fluid 1 containing the oil 8 and sludge 9 sent to the collection tank 1B4 is separated into oil 8, sludge 9, and water-soluble polishing liquid in the collection tank 13 and used again. Ru.

(5) Next, when the operation of the suction pump 12 is stopped, the machining fluid 1 stored from the gap 15 between the guide member 2 and the intake member 3 is gradually taken into the guide member 2. , the intake liquid level B is raised. Then, the intake member 3 slides upward inside the guide member 2, and the intake port 10 is positioned above the reservoir liquid level A.

According to the above-mentioned oil or sludge recovery device, the intake member 3 and float 5 near the intake port 10 are hard to be contaminated with sludge 9 etc. due to the flow of machining fluid 1, and as described above, Since the outer surface of the member 3 moves up and down, attached sludge 9 and the like can be easily peeled off. Furthermore, even if dirt such as sludge 9 adheres, the intake port 10 can be kept at a level slightly below the level A of the processing fluid 1 by adjusting the suction force of the suction pump 12. Therefore, the high concentration portion of oil 8 and sludge 9 can always be taken in, and the recovery rate of oil 8 and sludge 9 can be maintained at a high level.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and may be modified and embodied as desired without departing from the spirit of the invention, for example, as described below.

(1) Floats are not limited to gas-tight ones;
For example, the bottom end may be open.

(2) The float is not limited to one that protrudes above the intake member; as shown in FIG. 4, the float 2 is attached with most of its parts contained inside the intake member 3.
It may be 5. In this case, the intake port 20 becomes wider.

"Effects of the Invention" Since the oil or sludge recovery device of the present invention is configured as described above, floating oil and sludge are collected at a level slightly below the level of the stored processing fluid where they are concentrated. The advantage is that the position of the intake port can be maintained by locating the intake port and preventing sludge from adhering to the intake member, thereby maintaining the recovery rate of this oil and sludge at a high level. It has a great effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the usage state of an embodiment embodying the oil or sludge recovery device of the present invention, FIG. 2 is a sectional view similarly showing the usage state, and FIG. 3 is a plan view of the main parts.
FIG. 4 is a cross-sectional view of another example, and FIG. 5 is a cross-sectional view showing a conventional example in use. 1... Processing fluid, 2... Guide member, 3...
・Intake member, 5, 25... float, 8...
Oil, 9...Sludge, 10.20...
・Intake port, 12... Suction pump, A... Reserved liquid level,
B...Intake liquid level. Patent applicant Odai Iron Works Co., Ltd.

Claims (1)

[Claims] 1. An intake port (10) that takes in oil (8) or sludge (9) floating on the surface (A) of the stored machining fluid (1) together with the machining fluid (1). .
3), a cylindrical guide member (2) that slidably supports the member (2) in the vertical direction; and a machining fluid attached to the intake member (3) and taken into the guide member (2). The oil (8) floats on the intake liquid surface (B) of (1) together with the intake member (3).
Or when the sludge (9) is not collected, the intake port (10,
a float (5, 25) positioned above the reservoir liquid level (A); and a float (5, 25) connected to the lower part of the guide member (2), which
Alternatively, when collecting the sludge (9), the machining liquid (1) inside the guide member (2) is discharged from the guide member (2) to lower the intake liquid level (B), so that the intake member ( 3) downward to open the intake port (10, 20).
A recovery device for floating oil (8) or floating sludge (9), comprising a suction pump (12) that positions the liquid at a level slightly below the level of the stored liquid (A). 2. The floating oil or floating sludge recovery device according to claim 1, wherein the intake ports (10, 20) are formed in a wave shape that waves in the vertical direction.