JPH0737960B2 - Electrolyte solution sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a normal water leak which is a non-electrolyte solution when an electrolyte solution, particularly salt water or an aqueous solution of salt (hereinafter referred to as salt water) leaks to a floor surface or the like. The present invention relates to an electrolyte solution sensor that can classify and quickly find the leaked place.

[Conventional technology]

In recent years, it has become common to transport seafood and the like alive, and therefore, salt water tanks that store a large amount of salt water have come to be used at the transportation site. If it is a normal freight vehicle, even if some salt water leaks from the salt water tank to the floor surface, etc., the leak can be stopped when it is noticed and the leaked salt water can be washed away. However, in the case of transportation by aircraft, it is necessary to immediately detect and respond to leakage of salt water due to the limitations of the materials and the structure of the aircraft.
That is, when there is a possibility that deterioration due to corrosion or the like of airframe constituent materials may lead to a serious accident in an aircraft or the like, it is necessary to detect a leak early and completely wash it out in order to prevent such a serious accident.

As such a leak sensor for detecting a leak of liquid, a leak sensor for detecting a leak of liquid such as water or oil can be diverted. For example, when these liquids leaked between two conductors infiltrate, there is one that detects the leakage by electrically detecting the change in the electric resistance or the capacitance (for example, Japanese Utility Model Publication No. 56-43940). (See the official gazette). In order to specify the place, there is a method in which a position detection line is further provided between the two conductors and the place is specified by a section detection method or the like.

[Problems to be Solved by the Invention]

The electric leakage sensor described in the conventional art uses an electric means such as energization and thus requires a complicated electric control device for its analysis and display. Therefore, in order to always maintain a good operating state, there is a problem that maintenance inspection by a skilled operator is necessary. Also, it cannot be used when explosion-proof or other safety-related electrical means are prohibited. In addition, increasingly complex electrical equipment is needed to detect only salt water and not ordinary water. In the case of transportation by the above-mentioned aircraft, a leak sensor that requires complicated operation is unsuitable, and an amateur can find it at a glance or a saltwater leak and its location can be identified by a simple confirmation operation, such as a disposable sensor. A leak sensor is desired and the use of electrical means is not preferred.

The present invention has been made in view of such problems of the conventional technique, and an object of the present invention is to provide an electrolyte solution sensor capable of quickly finding a leaked portion of an electrolyte solution such as salt water by visual inspection.

[Means for Solving the Problems]

In order to achieve the above object, the electrolyte solution sensor of the present invention is such that at least two metal wires made of a metal whose electrodes have different electrode potentials with respect to the electrolyte solution to be detected are short-circuited at at least one location, and each metal is The wire is covered with a permeable but non-absorbent inner braid layer, and the covered metal wires are arranged in parallel or twisted and the outside is impregnated with an acid-base indicator. It is coated with a braid layer.

The electrolyte solution sensor may be provided with a liquid-soluble display material that develops a color different from the indicator color of the acid-base indicator inside the outer braid layer.

Further, the electrolyte solution sensor, the inner braid layer is colored a color different from the indicator color of the acid-base indicator, or the inner braid layer of the non-liquid-soluble color different from the indicator color of the acid-base indicator In addition to providing the display material, the outer braid layer may be made of fibers that become transparent when absorbing liquid.

[Action]

When the electrolyte solution leaks, it penetrates into the absorbent outer braid layer, and further passes through the permeable inner braid layer to reach two metal wires having different electrode potentials with respect to the electrolyte solution to be detected at least on the surface. Since the two metal wires are short-circuited at at least one place, a difference in electrode potential occurs between these metal wires and a current flows. Then, the electrolyte solution is electrolyzed, and if it is salt water, a strong alkali
NaOH is formed. This NaOH passes through the permeable inner braid layer to the outer braid layer. Since the outer braid layer is impregnated with an acid-base indicator (base indicator in the case of alkali), this NaOH reacts with the base indicator to give an indicator color.
On the other hand, the water of the non-electrolyte solution only soaks in when leaking and does not develop color.

Then, the liquid-soluble display material that develops a color different from the color indicated by the acid-base indicator permanently displays the location where the liquid leaks regardless of whether it is an electrolyte solution or water. If the electrolyte solution leaks and is not discovered and dries, the indicator color of the acid-base indicator disappears, but the indicator of this indicator remains so that the location of the leak can be specified. When it is re-soaked, if salt water is leaking, NaOH and the base indicator will react again to give the indicator color. If water leaks, it will not develop color.

The inner braid layer is colored to a color different from the indicator color of the acid-base indicator, or a non-liquid-soluble indicator material having a color different from the indicator color of the acid-base indicator is provided inside the outer braid layer, and the outer braid is also provided. If the layer is made of a thread that becomes transparent when absorbing liquid, it is easy to see where the liquid leaks until the coloring of the inner braid layer or the display material emerges when absorbing liquid and the leak dries regardless of the electrolyte solution or water. To display. Therefore, the position of the leak is indicated so that it is possible to go to this place and check in detail whether or not there is an indicator color that the acid-base indicator has reacted.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are perspective views of the electrolyte solution sensor, and FIG. 4 is a view showing a usage state of the electrolyte solution sensor.

In FIG. 1, the electrolyte solution sensor 1 is composed of two metal wires.
The inner braid layer 4 and the inner braid layer 3 are arranged or twisted in parallel, and the outer braid layer 5 covers them.

The two metal wires 2 and 3 are, for example, a copper wire 2 and an aluminum wire 3 having different electrode potentials with respect to salt water which is an electrolyte solution to be detected. Then, these are covered with an inner braid layer 4 described below and then arranged in parallel or twisted and short-circuited at one end 6. And, wherever salt water leaks, electrolysis occurs between the metal wires 2 and 3.
The entire metal wires 2 and 3 do not have to be the above-mentioned copper and aluminum, and only the surface thereof may be thick-plated. Also, the short-circuited location of the metal wires 2 and 3 is not limited to only one end,
It may be short-circuited at both ends. Furthermore, if the metal wires 2 and 3 are short-circuited at a required place, they can be arbitrarily cut and used until a short-circuit can be secured at at least one place depending on the place of use.

The inner braid layer 4 is formed by weaving a monofilament-like polyethylene thread, for example. Since this inner braid layer 4 is a braid, it is permeable to allow liquid to pass therethrough,
Moreover, it is non-absorptive and does not stop this leakage. Therefore, it is possible to electrolytically decompose the leaked liquid that has passed through the outer braided layer 5 described below with the two metal wires 2 and 3, and send the product back to the outer braided layer 5 again. . Then, the metal wires 2 and 3 coated with the inner braid layer 4 are arranged (arranged in parallel) or twisted substantially parallel to each other.

The outer braided layer 5 is formed by weaving a liquid absorbing thread impregnated with an acid-base indicator. The liquid-absorbent yarn is preferably made of an organic synthetic fiber containing polymetaphenylene isophthalamide as a main component [eg, Conex (registered trademark) manufactured by Teijin Ltd.]. That is, this Conex has excellent heat resistance and flame retardancy, and can be used in places where severe heat resistance and flame retardancy are required, such as in aircraft. As the acid-base indicator impregnated in this fiber, a PH indicator, a hydrogen ion concentration indicator,
Organic dyes of phthalein type, sulfonephthalein type, azo type, trifel methane type, benzein type, nitro type, which are called neutralization indicators, are used. Among them, phenolphthalein is usually colorless crystals and exhibits a deep red color when dissolved in an alkali. Therefore, it is most suitable as an acid-base indicator when an alkali is generated by electrolysis like salt water. In addition, the liquid-absorbent yarn is not limited to Conex, and multifilament yarn, spun yarn, or the like that has excellent liquid-absorbing properties such as Tetron and can be impregnated with an acid-base indicator is selected.

FIG. 2 shows an electrolyte solution sensor to which a liquid-soluble display material is added. That is, as compared with the one shown in FIG. 1, the liquid-soluble display material 7 is provided in the recess between the two metal wires 2 and 3 covered with the inner braid layer 4, and is integrated in the outer braid layer 5. It is the one that is coated. The display material 7 is, for example, a linear material such as a thread, a string, or a paper tape impregnated with a display material such as a coloring agent or a light emitting material. When the display material is dissolved in water, at least the color of the outer braid layer 5 is increased. Elutes a color that can be clearly distinguished from. Therefore, if there is liquid leakage regardless of whether it is salt water or water, even if the leaked portion is dried, the color of the indicating agent has melted out to the surface of the outer braided layer 5 at that portion, and the leaked place You can search for later. Even if the indicator color of the acid-base indicator disappears, water can be added to the leaked portion to inspect whether the indicator color of the acid-base indicator again appears. If the indicator does not show the color of the indicator, it is a mere water leak, and if the indicator of the indicator shows the color, it is salt water, so it can be judged that it is necessary to wash the nearby unit. The display material may be wound in a spiral shape on the outside of the inner braid layer 4 using a thread, a string, a paper tape, or the like, which is soaked with a coloring material or the like. In addition, the one to which the liquid-soluble display material 7 is added is basically used as a disposable item.

FIG. 3 shows an electrolyte solution sensor to which a non-liquid soluble display material is added. That is, the non-liquid-soluble display material 8 is provided in the recess between the two metal wires 2 and 3 covered with the inner braid layer 4, and is integrally covered with the outer braid layer 9. .
Further, the outer braid layer 9 is made of a non-liquid-soluble multifilament yarn or a spun yarn which not only has a liquid absorbing property of easily conducting a leak due to a capillary phenomenon but also becomes transparent by the liquid absorbing. Therefore, the outer braided layer 9 is opaque due to diffuse reflection in a dry state, but becomes transparent when absorbing liquid, and the non-liquid-soluble display material 8 inside appears to be transparent. The display material 8 is selected to have a color that can be clearly distinguished from the color of the threads forming the outer braid layer 9.
Therefore, if there is liquid leakage regardless of salt water or water, the leaked portion can be clearly seen. Then, it is possible to inspect the liquid leak location in detail whether or not the indicator color of the acid-base indicator is exhibited. When this electrolyte solution sensor is used, for example, in a place where water may spill frequently, if it is just water, it will be dried and returned to its original state if left alone. It should be noted that it is possible to woven it as a part of the inner braid layer 4 by using a thread impregnated with the display material, or to color the entire inner braid layer non-liquid-soluble.

FIG. 4 shows a usage state of the leak sensor described above, and the electrolyte solution sensor 1 can be placed around the salt water tank 10, for example. In general, leakage often occurs around the liquid, so that the leakage can be detected efficiently. In addition,
The liquid leakage sensor 1 is convenient because it can be easily laid and removed when it is used as a disposable item.

In addition, although the above description demonstrated the case where salt water was used as the leak, the leak is not limited to only the salt water. That is, if the liquid is an electrolyte, the present invention can be applied by appropriately selecting the electrode material and the acid-base indicator.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

First, it is safe because it has no electrical means. And
At least two metal wires made of metal having different electrode potentials for the banquet solution to be detected on the surface are short-circuited at at least one location, and each metal wire is permeable but non-liquid absorbing inner braid Coating with a layer, the coated metal wires are juxtaposed or burned together, and the outside is coated with a liquid-absorbent outer braid layer impregnated with an acid-base indicator, an electrolyte solution,
For example, if salt water etc. leaks, NaOH etc. will be generated due to electrolysis and the indicator color will be displayed, so you can check the location where salt water etc. leaked at a glance, and anyone can quickly and easily detect it without adjusting electrical equipment etc. be able to.

Then, a liquid-soluble display material that develops a color different from the indicator color of the acid-base indicator was provided inside the outer braid layer so that the leaked location could be permanently displayed regardless of the electrolyte solution or water. So, for example, even in a place where people are not always present, such as in an aircraft cargo compartment, you can later identify the location of the leak and simply drop water to reconfirm whether the leak is an electrolyte solution, cleaning, etc. You can take appropriate measures.

In addition, the inner braid layer is colored with a color different from the indicator color of the acid-base indicator, or the inner braid layer is provided with a non-liquid-soluble display material having a color different from the indicator color of the acid-base indicator, As the outer braided layer is made of a thread that becomes transparent when absorbing liquid, the leaked place is made conspicuous regardless of the electrolyte solution or water, so that it is possible to detect the leak in a place where people are always present, for example. It is not necessary to replace the electrolyte solution sensor frequently because it returns to the original state if it is just water leakage.

[Brief description of drawings]

1 to 3 are perspective views of the electrolyte solution sensor, and FIG. 4 is a view showing a usage state of the electrolyte solution sensor. In addition,
The explanation of the main symbols in the drawings is as follows. 1 ... Electrolyte solution sensor, 2,3 ... Metal wire, 4 ... Internal braid layer, 5,9 ... External braid layer, 6 ... One end (short circuit point), 7 ... Liquid-soluble display material, 8: Non-liquid soluble display material.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Teruyoshi Parki 2-3-1, Iwata-cho, Higashi-Osaka City, Osaka Prefecture Tatsuta Electric Wire Co., Ltd. (72) Inventor Akihide Kato 1-6, Haneda Airport, Ota-ku, Tokyo No. 3 Nihon Airlines Co., Ltd. Technical Research Institute (72) Inventor Sugiyama ▲ Kichi ▼ husband 1-6-3 Haneda Airport, Ota-ku, Tokyo Nihon Airlines Co., Ltd. Technical Research Institute

Claims (3)

[Claims] 1. At least two metal wires made of a metal having different electrode potentials with respect to an electrolyte solution to be detected on the surface are short-circuited at at least one location, and each metal wire is permeable but non-absorbent. Of the inner braid layer, the coated metal wires are arranged or twisted in parallel, and the outside is covered with a liquid-absorbent outer braid layer impregnated with an acid-base indicator. Electrolyte solution sensor. 2. The electrolyte solution sensor according to claim 1, wherein a liquid-soluble display material that develops a color different from the indicator color of the acid-base indicator is provided inside the outer braid layer. 3. The electrolyte solution sensor according to claim 1, wherein the inner braid layer is colored in a color different from the indicator color of the acid-base indicator, or the inside of the outer braid layer indicates the acid-base indicator. In addition to providing a non-liquid soluble display material of a color different from the color,
An electrolyte solution sensor in which the outer braid layer is made of a thread that becomes transparent when absorbing liquid.