JPH05230492A - Method and apparatus for preventing decay of water-soluble oil - Google Patents

Abstract

PURPOSE:To make it possible to sterilize a water-soluble oil to thereby prevent the decay by incorporating specified ions into the oil by a specified method. CONSTITUTION:By using an apparatus having a constitution wherein an anode made of at least a coppery material 41 and a cathode 7 forming a pair with the anode are arranged in a flow path in a vessel preferably having an inlet 2 and an outlet 8 for a water-soluble oil, and the oil is passed through the flow path in a state in which an electric current flows between the anode and the cathode (air is ejected from a pump 9 to cause the oil to flow and be discharged through the outlet 8), electricity is turned on using at least the coppery material 41 as the anode on the way of a path through which the oil circulates, thus incorporating at least copper ions into the oil passing through the circulating path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for preserving a water-soluble cutting fluid, a water-soluble grinding oil, a water-soluble hydraulic fluid or the like.

[0002]

2. Description of the Related Art Many oil agents are repeatedly used to prevent frictional heating, but when they are water-soluble, they may rot in summer and give off a bad odor.

As a measure to prevent this, a water-soluble oil agent,
For example, a method of regularly mixing a water-soluble oil agent with a preservative,
It is in practical use to utilize ceramics that emit far infrared rays. However, the effect has not reached the point of completely preventing corruption. Although sterilization by ultraviolet rays is also practically used, the running cost of electric energy is relatively high, and the device itself is inevitably expensive.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the drawbacks of the prior art in the first half of the previous term and to provide a method and a device for embodying the method that can dramatically improve the antiseptic effect. is there.

[0005]

The gist of the present invention is sterilization,
The purpose is to forcefully mix copper ions having a fungicidal effect into a water-soluble oil agent.

That is, in the method according to the present invention, an anode made of at least a copper material and a cathode forming a pair with this anode are arranged in the flow path of the water-soluble oil agent, and the current flows in the state of being energized between the anode and the cathode. A water-soluble oil agent is caused to flow through the passage, and at least copper ions are mixed into the water-soluble oil agent passing therethrough, so that the concentration of copper ions or the like in the water-soluble oil agent becomes a certain value or more.

[0007]

Function The cause of the malodor caused by the corrosion of the water-soluble oil agent is presumed to be the following three stages of bacterial growth process. That is, in the first stage, aerobic bacteria such as green bacterium are generated, then facultative anaerobic bacteria such as Escherichia coli are generated, and sulfate-reducing bacteria are generated in the final stage. Bacteria are the main cause of malodor.

On the other hand, the trace action of copper (microorganisms are sterilized by the action of copper ions dissolved in water in an extremely small amount) is well known, and it is known that silver ions also have the same action. ing.

Therefore, if the ions of copper or silver are forcibly mixed into the water-soluble oil agent by using the ion generating means, those ions are remarkable against facultative anaerobic bacteria generated in the second step. It exhibits a bactericidal effect, and can suppress the progress to the third step and prevent the generation of malodor.

In the case of copper, it is desirable that the trace amount of copper has a copper ion concentration of 0.7 ppm or more. Therefore, it is desirable to forcibly mix copper ions and silver ions into the water-soluble oil agent in the middle of the flow path of the water-soluble oil agent to increase the concentration of copper ions, etc. in the water-soluble oil agent. It may be either continuous or continuous.

It is desirable that the copper material or silver material as the ion source has a large thickness such as a rod, a strip or a block in consideration of the frequency of replacement.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, FIGS. 1 and 2 show an embodiment of a throw-in type device.

In the case of the apparatus of the first embodiment, as shown in FIG. 1, the container 1 of the main body is constructed such that one wall 2 thereof is a net having a large number of holes, and the inside thereof is shown in FIG. As shown in
An electrode chamber 5 that accommodates the filter 3 and the copper material 41 that serves as an ion source is provided. A wall 51 that defines this electrode chamber 5
Each of the holes 52 and 52 has a large number of holes like the wall 2 so that the water-soluble oil agent can pass therethrough.
An electrode 7, which serves as a cathode when the copper material 41 is used as an anode, is arranged in a chamber 6 following the electrode chamber 5, and a drain pipe 8 for discharging a water-soluble oil agent is attached above the electrode 7. An end of an air pipe 10 connected to an air pump 9 outside the main body container 1 is attached to the lower end of the water distribution pipe 8.
In this example, the electrode chamber 5 is divided into two, and the silver material 42 serving as a silver ion source is accommodated in the upper part thereof.

The apparatus having such a configuration is immersed in a water-soluble oil agent such as a water-soluble cutting oil in an oil tank, and the wiring 131 on the positive side from the DC power source 12 to the copper material 41 and the silver material 42.
On the other hand, the wiring 132 on the negative side is provided to the cathode electrode 7. The air pump 9 may be of a solenoid valve type or the like, and when it is operated to eject air into the water distribution pipe 8, the water-soluble cutting oil that has reached the chamber 6 is forcibly discharged from the water distribution pipe 8 together with the air. Circulates to and from the oil tank. In this case, since the water-soluble cutting oil in the chamber 6 is mixed with copper ions and silver ions generated by energization, the concentration of copper ions etc. in the water-soluble cutting oil in the oil tank rises and the trace amount of them By the action, the water-soluble cutting oil is sterilized and its spoilage is prevented, but in the case of the device of the present embodiment, it can be said that it is a highly practical system because there is no driving part in water.

Since the microorganisms that grow in the water-soluble oil agent are various, and the types of microorganisms that can be sterilized differ between copper ion and silver ion, in the examples, silver material is used in addition to copper material as the anode. However, the ion source may be only copper material.

Since the system for measuring the concentration of metal ions has been put into practical use, the ion generation value can be controlled by controlling the current of the DC power supply 12 by the system.

Since silver needs more time than copper to obtain the concentration of metal ions required for sterilization under the same current-carrying condition, it is desirable to use different switches for the copper material and the silver material. You may make it install a timer.

3 and 4 show another embodiment of the present invention. In the case of this embodiment, a refueling hose 102 is attached via a pump 101 to the intake side of the water-soluble oil agent of the main body container 100, and the pump 10 is also similarly attached to the discharge side.
The oil drain hose 104 is attached via the 3.

In this apparatus, however, as shown in FIG. 4, the respective hoses 102 and 104 are inserted into a water-soluble oil detergent in the oil tank 115, for example, water-soluble cutting oil 116, and the copper material 41, silver material 42 and The cathode electrode 7 is wired to the DC power supply 12, and oil is supplied from the oil tank 115 by the pump 101, and oil is supplied to the ion generating portion composed of the anode copper material 41 and silver material 42 and the cathode electrode 7 which are energized by the DC power supply 12. To do. By doing so, the water-soluble cutting oil containing copper ions, etc. passes through the filter 3, and the hose 104 is pumped by the pump 103.
The concentration of copper ions and the like in the water-soluble cutting oil 116 rises through the water through the oil tank 115, and the trace amount of the water sterilizes the water-soluble cutting oil to prevent the water-soluble cutting oil from spoiling. This is the same as the case of the embodiment. In this case, by making the main body container 100 airtight, either one of the pumps 101 and 103 can be improved.

Of course, the silver material 42 as the anode may be omitted, or the switch for the power source 12 may be separately provided for each anode material.

In any case, it is easy to generate high-concentration ions of about 1 ppm or more by applying low voltage and low current.

By the way, when a copper piece is immersed in 400 liters of water-soluble cutting oil (“Similon EX-120” manufactured by Daido Chemical Industry Co., Ltd .; the same applies below) for 20 days, the copper contained in the water-soluble cutting oil is Although the ion concentration was 0.13 ppm, the block-shaped copper material was immersed in the same water-soluble cutting oil as this, and the copper material was used as an anode while circulating the water-soluble cutting oil at 2-3 liters / minute. When a current of 10 V and 8 mA was applied for 40 hours, the copper ion concentration in the water-soluble cutting oil was 19 ppm.
Met.

When a copper material and a silver material were placed on the anode side of an apparatus similar to the apparatus shown in FIGS. 1 and 2, and the presence of bacteria was confirmed in the water-soluble cutting oil treated in the same manner, the result was zero. was gotten.

Although the result shows that the trace amount action of silver is added, there is no doubt that the trace amount action of copper effectively acts to sterilize the water-soluble cutting oil.

In addition, in the measurement example in which tap water was energized under the same energization conditions as described above, the concentration of copper ions was 0.5 ppm, but with water-soluble cutting oil it was 19 ppm.
Saw the occurrence of. This difference in copper ion concentration is considered to be due to the difference in pH between tap water and the water-soluble cutting oil.

In many cases, the water-soluble cutting oil has a pH of 8-9. This is because when the water-soluble cutting oil leans toward acidity, it becomes alkaline because it causes corrosion problems of the object to be cut and the like, but the water-soluble cutting oil is alkaline even though it is alkaline. So
The energization is convenient because generation of copper ions and the like is promoted. From this point, it can be said that the present invention in which a copper ion or the like is electrically generated in the water-soluble oil agent is extremely effective.

[0027]

As is apparent from the above description, the present invention is a method of forcibly mixing copper ions and the like in the water-soluble oil agent by energization, so that the concentration of copper ions and the like in the water-soluble oil agent is increased. By the action, the water-soluble oil agent can be sterilized to prevent its spoilage, and an offensive odor due to the decay of the water-soluble oil agent can be prevented at a low running cost.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an apparatus for carrying out the method according to the present invention.

2 is a cross-sectional view of the device shown in FIG.

FIG. 3 is a sectional view showing another embodiment of the apparatus for carrying out the method according to the present invention.

FIG. 4 is a perspective view showing an example of a usage state of the device shown in FIG.

[Explanation of symbols]

 1 Main Container 2, 51 and 52 Wall 3 Filter 41 Copper Material 42 Silver Material 5 Electrode Chamber 6 Chamber 7 Cathode Electrode 8 Drain Pipe 9 Air Pump 10 Air Piping 12 DC Power Supply 101 and 103 Pump 102 and 103 Hose 116 Water-soluble Cutting Oil

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[Procedure amendment]

[Submission date] March 4, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

By the way, when a copper piece is immersed in 400 liters of water-soluble cutting oil (“Similon EX-120” manufactured by Daido Chemical Industry Co., Ltd .; the same applies below) for 20 days, the copper contained in the water-soluble cutting oil is Although the ion concentration was 0.13 ppm, the block-shaped copper material was immersed in the same water-soluble cutting oil as this, and the copper material was used as an anode while circulating the water-soluble cutting oil at 2-3 liters / minute. When a current of 10 V and 800 mA was applied for 40 hours, the copper ion concentration in the water-soluble cutting oil was 19p.
It was pm.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI technical display location C10N 30:16 40:08 40:22 70:00 (72) Inventor Satami Katsumada Kida Tsuchiura, Ibaraki Prefecture 3550 Yomachi, Hitachi Shinka Co., Ltd. (72) Inventor Seiichi Takagi 3550, Kida Yomachi, Tsuchiura City, Ibaraki Hitachi Shinka Co., Ltd.

Claims (2)

[Claims] 1. A preservative for a water-soluble oil agent, characterized in that at least a copper material is used as an anode in the middle of the water-soluble oil agent circulation path to energize to mix at least copper ions into the water-soluble oil agent passing through the circulation path. Method. 2. An anode made of at least a copper material and a cathode forming a pair with the anode are arranged in a flow path in a container having an inflow portion and an outflow portion of the water-soluble oil agent. An antiseptic device for a water-soluble oil agent, characterized in that the water-soluble oil agent can be circulated through the flow path while an electric current is applied therebetween.