JPH07155715A - Water-soluble washing device - Google Patents

Abstract

PURPOSE:To prevent resticking of an oil-component to a wash stuck with the oil- component at the time of taking out the wash by immersing the wash into a washing liquid to suspend a part of the oil-component, allowing the suspended oil-component to flow over and successively separating the component to the washing liquid, the oil component and an emulsifying liquid in order in primary and secondary storage tanks. CONSTITUTION:Part of the oil sticking to the wash W liberates and floats from the wash W and another part is emulsified by the washing liquid and floats in the form of the emulsifying liquid when the wash W is put into an inside tank 1A of a washing tank 1. At this time, the washing liquid ejected from a piping 8A is sprayed by a pump 8B to the wash W and the washing liquid in the inside tank 1A is stirred. The floating oil-component and emulsifying liquid are made to flow over together with the washing liquid from the inside tank 1 to the outside tank 1B and to flow into a primary sepn. tank 2 where the liquids are separated to the washing liquid, the oil-component and the emulsifying liquid by their differences in sp. gr. The separated oil-component and emulsifying liquid are made to flow over and transfer to a secondary sepn. tank 3 where the oil-component and the emulsifying liquid are similarly separated by their differences in sp. gr.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing oil adhering to an object to be cleaned with an aqueous cleaning solution.

[0002]

2. Description of the Related Art Conventionally, for example, when cleaning cutting oil (oil content) from a machined work (object to be cleaned), organic solvents such as trichlene and freon have been used. But,
The organic solvent has a problem that it adversely affects the human body and damages the global environment. Therefore, recently, a water-soluble cleaning liquid has been frequently used.

By the way, as a method of cleaning using a water-soluble cleaning liquid, a method of spraying the cleaning liquid on an object to be cleaned,
There is a method of immersing an object to be cleaned in a cleaning liquid. In the former method, if the shape of the object to be cleaned is complicated,
The cleaning liquid may not sufficiently spread to each part of the object to be cleaned, and a cleaning residue may occur. On the other hand, the latter method has an advantage that the cleaning liquid can be sufficiently distributed to each part of the object to be cleaned. The present invention relates to the latter method.

[0004]

However, when the object to be cleaned is immersed in the cleaning solution for cleaning,
The oil released from the object to be cleaned floats on the surface of the cleaning liquid to form an oil film. For this reason, there is a problem that the oil content adheres to the object to be cleaned again when the object to be cleaned is taken out from the cleaning liquid. Further, when the water-soluble cleaning liquid is used, it has been demanded that the cleaning liquid used for cleaning can be reused for cleaning without being discarded as it is.

[0005]

The present invention has been made in consideration of the above circumstances, and contains a water-soluble cleaning liquid,
A cleaning tank in which the object to be cleaned with oil adheres is immersed, a cleaning liquid overflowing from this cleaning tank is stored, and a primary separation tank for separating the cleaning liquid from the oil component and the emulsified liquid by the difference in specific gravity; By returning the cleaning liquid separated in the separation tank to the cleaning tank, the first return system for overflowing the cleaning liquid from the cleaning tank and the oil and emulsion separated in the primary separation tank are stored and A second separation tank for separating the cleaning liquid from the oil and the emulsified liquid;
Equipped with a discharging means for discharging the oil and the emulsion separated in the secondary separation tank to the outside, and a second return system for returning the cleaning liquid in which the oil and the emulsion were separated in the secondary separation tank to the cleaning tank. It is characterized by that.

[0006]

When the object to be cleaned with oil adhered is immersed in the cleaning liquid in the cleaning tank, part of the oil is separated from the object to be cleaned and floats, and the other part becomes an emulsion and floats. These oils and emulsions overflow from the washing tank together with the washing liquid. Therefore, when the object to be cleaned is taken out from the cleaning tank, oil does not adhere to the object to be cleaned again.

The cleaning liquid overflowing from the cleaning tank is
It is stored in the primary separation tank. In the primary storage tank, the cleaning liquid is separated from the oil component and the emulsified liquid due to the difference in specific gravity. The separated cleaning liquid is returned to the cleaning tank by the first return system and is again used for cleaning. Further, by returning the cleaning liquid to the cleaning tank, the cleaning liquid overflows from the cleaning tank.

The oil and emulsion separated in the first separation tank are stored in the second separation tank. Then, the cleaning liquid is separated from the oil and the emulsion due to the difference in specific gravity. The cleaning liquid separated in the secondary separation tank is returned to the cleaning tank by the second returning system and is again used for cleaning. The oil and the emulsion separated in the secondary separation tank are discharged to the outside by the discharging means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. 1 is a diagram showing a schematic configuration of the cleaning apparatus according to the present invention. This cleaning apparatus includes a cleaning tank 1, a primary separation tank 2, a secondary separation tank 3, a rinsing tank 4 and a drying chamber 5.

The cleaning tank 1 has a double tank structure,
It has an inner tank 1A and an outer tank 1B. A water-soluble cleaning liquid is stored in the inner tank 1A in a state where its liquid surface is substantially aligned with the upper edge of the inner tank 1A. The cleaning object W to which the oil is attached is immersed in the cleaning liquid in the inner tank 1A. Outer tank 1A
Is for receiving the cleaning liquid overflowing from the inner tank 1A, and is arranged so as to surround the inner tank 1A.

The primary separation tank 2 is for storing the cleaning liquid overflowing from the cleaning tank 1 and separating it into a cleaning liquid, an oil component and an emulsion by the difference in specific gravity.
The cleaning liquid overflowing from A to the outer tank 1B flows into the primary separation tank 2 through the pipe 6 and the silencer 7. The silencer 7 prevents the cleaning liquid from flowing into the primary separation tank 2 vigorously and agitates the cleaning liquid in the primary separation tank 2, and is made of, for example, a porous ceramic.

A first return system 8 is provided between the primary separation tank 2 and the inner tank 1A. The first return system 8 is for returning the cleaning liquid separated in the primary separation tank 2 to the inner tank 1A, and is composed of a pipe 8A and a pump 8B. One end of the pipe 8A is connected to the lower end of the primary separation tank 2, and the other end is arranged inside the inner tank 1A so as to face the object W to be cleaned. Therefore, when the pump 8B is started, the cleaning liquid separated in the primary separation tank 2 is returned to the inner tank 1A while being sprayed onto the object W to be cleaned. Then, by returning the cleaning liquid to the inner tank 1A, the cleaning liquid in the inner tank 1A overflows into the outer tank 1B.

The secondary separation tank 3 is for storing the oil component and the emulsified liquid separated in the primary separation tank 2 and further separating the cleaning liquid contained in the oil component and the emulsified liquid by the difference in specific gravity. , And is connected to the primary separation tank 2 via a pipe 9. The pipe 9 is open at a location that coincides with the liquid surface of the primary separation tank 2. Therefore, the primary separation tank 2
The oil component and the emulsified liquid (including the cleaning liquid) separated in (3) flow into the secondary separation tank 3 via the pipe 9. In this case, in order to prevent the cleaning liquid stored in the secondary separation tank 3 from being agitated by the introduced oil, emulsion and cleaning liquid, a silencer 10 similar to the silencer 7 is provided in the pipe 9
It is installed at the lower end of.

A discharge pipe (discharge means) 11 is provided on the side wall of the secondary separation tank 3. This discharge pipe 11 is the second
It is arranged so as to coincide with the liquid surface of the next separation tank 3. Therefore, the oil and the emulsion separated from the cleaning liquid due to the difference in specific gravity are discharged to the outside through the discharge pipe 11. Then, it is accommodated in the waste tank 12.
It is desirable that the pipe 11 be provided with an on-off valve so that the cleaning liquid, the oil component and the emulsified liquid are sufficiently separated in the secondary separation tank 3 and then the on-off valve is opened to discharge the oil component and the emulsified liquid.

A second returning means 13 is provided between the secondary separation tank 3 and the inner tank 1A. The second returning means 13 includes a pipe 13A, and a pump 13B and a removing device 13C provided in the middle of the pipe 13A.
And the pipe 13A includes the secondary separation tank 3
Is connected to the lower end of. Therefore, the pump 13B
When is started, the cleaning liquid separated in the secondary separation tank 3 is returned to the inner tank 1A through the removing device 13C. The removing device 13C is for separating a trace amount of the emulsified liquid and oil contained in the cleaning liquid separated in the secondary separation tank 3 from the cleaning liquid, and is a well-known removing device such as a removing device using activated carbon. Is used.

The rinsing tank 4 is for rinsing the object to be cleaned W cleaned in the inner tank 1A of the cleaning tank 1 to remove the cleaning liquid from the object to be cleaned W, and contains water, preferably hot water. There is. A pipe 14 is arranged at the bottom of the rinsing tank 4,
A large number of small holes (not shown) are formed in the tube 14. Then, the air supplied from the air pump 15 is blown out from the small holes to form bubbles, and the items W to be cleaned are rinsed by the bubbles. In this case, the pipes 14 are arranged in a spiral shape centering on the central portion of the bottom surface of the rinsing tank 4.

An air nozzle 16 is provided in the drying chamber 5, and dry air, preferably heated air, is blown out from the air nozzle 16. Then, the cleaning target W is dried by blowing this air onto the cleaning target W after rinsing.

Next, the operation of the cleaning apparatus having the above structure will be described. First, the object W to be cleaned is put into the inner tank 1A of the cleaning tank 1, and the pumps 8B and 13B are activated. Part of the oil adhering to the object to be cleaned W is separated from the object to be cleaned W and floats up as it is, and the other part is emulsified by the cleaning liquid,
It becomes an emulsion and floats. At this time, the cleaning liquid ejected from the pipe 8A is sprayed onto the object W to be cleaned by the pump 8B, and the cleaning liquid in the inner tank 1A is agitated. As a result, the oil adhering to the object W to be cleaned is removed more neatly than when the object W to be cleaned is simply immersed in the cleaning liquid. The oil content and the emulsified liquid that have floated overflow with the cleaning liquid from the inner tank 1A to the outer tank 1B.

When the cleaning is completed, the object W to be cleaned is placed in the inner tank 1A.
Take out from. At this time, the oil and the emulsified liquid overflow together with the cleaning liquid from the inner tank 1A and are discharged to the outer tank 1B, so that no oil film is formed. Therefore, when the object W to be cleaned is taken out from the inner tank 1A, the object W to be cleaned W
No oil will adhere to the. The cleaned object W that has been cleaned is rinsed in the rinsing tank 4 and then dried in the drying chamber 5. After the object W to be cleaned is taken out, another object W to be cleaned is placed in the inner tank 1A.

The cleaning liquid overflowing into the outer tank 1B is
It flows into the primary separation tank 2 through the pipe 6 and is stored there. Then, due to the difference in specific gravity, the cleaning liquid is separated into the oil and the emulsion. In this case, the cleaning liquid is the primary separation tank 2
Needless to say, the oil and the emulsion are accumulated on the bottom side, and the oil and the emulsion are accumulated on the surface side.

The cleaning liquid accumulated on the bottom side of the primary separation tank 2 is returned to the inner tank 1A by the first return system 8 and is again used for cleaning. On the other hand, the oil and the emulsion separated on the surface layer side flow into the secondary separation tank 3 via the pipe 9.

The oil and the emulsified liquid that have flowed into the secondary separation tank 3 are further separated from the cleaning liquid that has flowed into the secondary separation tank 3 due to the difference in specific gravity. This secondary separation tank 3
The high-concentration oil content and the emulsion separated in step 1
Is discharged to the waste tank 12. When the oil content and the emulsified liquid are discharged from the discharge pipe 11, a part of the cleaning liquid is discharged together with them, so that the cleaning liquid gradually decreases. Replenish the cleaning solution that has decreased in amount as appropriate. The replenishment may be performed manually or automatically based on the water level in the primary separation tank 2 or the secondary separation tank 3.

On the other hand, the cleaning liquid separated in the primary separation tank 3 is supplied to the inner tank 1A for cleaning again after the trace amount of oil and emulsified liquid contained therein are removed by the removing device 13C. .

FIG. 2 shows another embodiment of the present invention. In the cleaning apparatus of this embodiment, the inner tank 1
A spiral pipe 17 (air blowing means) is installed at the center of the bottom of A. One end of the pipe 17 inside the inner tank 1 is closed, and the other end is connected to an air supply source (not shown). Further, the pipe 17 is formed with a large number of small holes 17a. Therefore, when air is supplied from the air supply source, the air spouted from the large number of small holes 17a rises into a large number of bubbles and raises the water level at the center of the liquid surface of the inner tank 1A. The rest of the configuration is the same as that of the above-mentioned embodiment, so its explanation is omitted.

When the object to be cleaned is cleaned by the cleaning apparatus of this embodiment, the object to be cleaned is placed above the pipe 17. With such an arrangement, the cleaning liquid near the object to be cleaned is agitated by the air bubbles ejected from the pipe 17, and a new cleaning liquid always comes into contact with the object to be cleaned. Therefore, the cleaning efficiency can be improved. Moreover, the bubbles contact with the object to be cleaned, so that the oil adhering to the object to be cleaned is removed. Thereby, the cleaning efficiency can be further improved.

The oil and the emulsified liquid removed from the object to be cleaned rise together with the cleaning liquid and then overflow from the inner tank 1A. In this case, since the water level in the central portion of the liquid surface of the inner tank 1A is raised by the bubbles, the cleaning liquid near the object to be cleaned rises to the central portion of the liquid surface of the inner tank 1A and then flows toward the peripheral portion and Overflow from tank 1A. Then, the oil component and the emulsified liquid also flow along with the flow of the cleaning liquid and overflow, and the oil component and the emulsified liquid do not stay in the central portion of the liquid surface. Therefore, it is possible to more reliably prevent the oil and the emulsion from adhering to the object to be cleaned when the object to be cleaned is pulled up after cleaning.

The present invention is not limited to the above embodiments, but can be modified as appropriate without departing from the spirit of the invention. For example, in the above example,
Although the cleaning tank 1, the primary separation tank 2 and the secondary separation tank 3 are arranged vertically, the tanks 1, 2 and 3 may be arranged horizontally. However, when arranging as such, the pipes 6, 9
It is necessary to install a pump in.

In the embodiment shown in FIG. 2, the water level at the center of the liquid surface of the cleaning liquid is raised by air blowing, but one end of the pipe 8A of the first return system 8 is connected to the inner tank 1A. The water level in the central portion of the liquid surface can also be raised by opening the central portion of the bottom surface and ejecting the cleaning liquid upward from the bottom surface. In this case, the first return system 8 also serves as the water level raising means.

[0029]

As described above, according to the water-soluble cleaning device of the present invention, it is possible to prevent oil from adhering when the cleaned object is taken out of the cleaning tank, and to use for cleaning. It is possible to obtain the effect that the cleaning liquid can be used for cleaning again without being discarded as it is.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an inner tank of another embodiment of the present invention.

[Explanation of symbols]

 W Object to be cleaned 1 Cleaning tank 1A Inner tank 1B Outer tank 2 Primary separation tank 3 Secondary separation tank 8 First return system 11 Discharge pipe (discharge means) 13 Second return system 13C Removal device 17 Pipe (air blow means) )

Claims (3)

[Claims] 1. A cleaning tank in which a water-soluble cleaning liquid is stored and in which an object to be cleaned with oil adhered is immersed, and a cleaning liquid overflowing from this cleaning tank is stored, and the cleaning liquid is separated from the oil component and the emulsion by the difference in specific gravity. And the first separation tank
By returning the cleaning liquid separated in the secondary separation tank to the cleaning tank, the first return system for overflowing the cleaning liquid from the cleaning tank and the oil component and the emulsion liquid separated in the primary separation tank are stored, and the specific gravity difference is stored. A secondary separation tank for separating the cleaning liquid from the oil and the emulsion, and a discharge means for discharging the oil and the emulsion separated in the secondary separation tank to the outside.
A water-soluble cleaning device, comprising: a second return system for returning the cleaning liquid, in which the oil content and the emulsion have been separated in the second separation tank, to the cleaning tank. 2. The water-soluble cleaning apparatus according to claim 1, wherein the cleaning tank is provided with a water level raising means for raising the water level of the center of the cleaning liquid to a level higher than the water level of the peripheral portion. 3. The water-soluble cleaning device according to claim 2, wherein the water level raising means is an air blow means provided in a central portion on the bottom side of the cleaning tank.