JPS5983029A - Device for detecting leakage of liquid - Google Patents

Abstract

PURPOSE:To ensure the detection of the leakage of liquid, by providing a pin with an intersection of two pushing plates as a rotary center, generating an electric signal when the ends of two plates are brought close together, and providing a mechanism, which fixes a resin that is softened or dissolved by the leaked liquid by a spring. CONSTITUTION:A receiving pan 8 is provided at a place where liquid is liable to leak in order to detect the leakage of the liquid from an apparatus or a plant which uses liquid. Resin 4, which is softened by the leaked liquid, is arranged on the pan 8 with an interval of 1-2mm. being provided. Two intersecting pushing plates 2 are attached to a metal fixture 7 so that they are rotated with a pin 1 as a center and so that they face each other. A contracting spring 5 is attached to the upper parts of the plates. Teflon plates 3 and 3 are screwed to the lower parts thereof. The resin 4, which is softened or discolored by the leaked liquid is supported by th force of the spring 5 between the plates 3 and 3. When the resin 4 is softened or dissolved, a magnetic switch 6 at the upper parts of the pushing plates 3 and 3 is closed by the contraction of the spring, and a signal is transmitted. Thus the leakage can be detected positively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detector that reliably detects water leakage, liquid depletion, etc. in devices, equipment, plant equipment, etc. that use liquids such as water and chemical solutions.

Conventionally, this type of detector has used a float switch, a tqM switch, etc. As for the float switch, it is a switch that uses a float, and there is a serious drawback in that it requires a certain amount of water to collect the chemical solution.

If there is a small amount of water or chemical liquid inside the device, it is not suitable as a detector for such cases.

The electrode switch is designed to prevent small amounts of water from being scooped or leaking.
However, the structure of the electrode switch has the following problems4). Structure and function of electric switch Q. There are two electrode rods, 499, and a voltage tray is applied between them. Water or a chemical solution is applied to two electrode rods, and detection is performed by a small current flowing through the liquid. In this way, the liquid to be detected must be injected, and it cannot be used as a detector in a liquid that is almost insulating, such as ultrapure water.

The purpose of the present invention is to eliminate these shortcomings and provide an effective detector that can detect even a very small amount of tiII even when dripping with chemical solutions and water. .

The features of the present invention are that the two presser plates are provided with dot pins that press against each other, and that a contraction spring is provided between the presser plates to attract the presser plates to each other at one end of the two presser plates. It has an electric device that can receive electrical signals, and the other end of the holding plate is equipped with a liquid leakage detector that has a mechanism in which the flexible resin is attached and fixed by the force of its contraction spring.

This will be explained in detail below using the drawings.

FIG. 1 shows an embodiment of the present invention, and its structure is as follows. Two pressing plates 2, each having a shape as shown in FIG. 1, are mounted facing each other and intersecting each other with the pin 1 as the center of rotation. A Teflon plate 3 is attached to the lower part of the holding plate 2 with screws so that it can withstand chemicals and the like. A soft resin 4 is sandwiched between the tear plates 3. On the other hand, a contraction spring 5 is attached to the upper part of the pin 1 to constantly pull the presser plate 2 with a certain force, and this pulling force causes the softening resin 4 to move between the Teflon plates 30 Retained. On top of the contraction springs 5, magnetic switches 6 are attached to the holding plate 2 with screws. There is a metal fitting 7 for mounting this detector on a device or equipment. This is fixed to the detector by inserting the other end of the fitting 7 between the nut to which the pin 1 is attached and the pin 10.

Next, the operating principle of this detector is as follows. Also the first
This will be explained using figures.

First, a saucer 8 for collecting leakage is placed inside the device or equipment at a place where water leakage or liquid overflow is likely to occur. If it is desired to detect even a small amount of water leakage or water leakage, the present detector is set so that the softenable resin 4 is in contact with the saucer 8. In addition, if you want to detect the water or chemical solution after it has accumulated to some extent, the distance between the softening resin 4 and the saucer 8 should be 1 to 2 mm.
Attach and set the detector at the position using the metal fittings 7.

Water leakage or liquid leakage occurs in the equipment, and the water, chemical liquid, etc. fall into the saucer 8 and accumulate there. The pool gradually spreads and comes into contact with the soft resin 4 of the L-length detector. This softenable resin 4 normally has a certain hardness and is solid, but has the property of softening or dissolving when it comes into contact with water, a chemical solution, or the like. Therefore, when the softened water/chemical solution softens or dissolves the softening resin 4, the distance between the tips of the presser plates 2, which were previously held due to the hardness of the softening resin 4, becomes shorter. The presser plate 2 is tightened by the contraction spring 5 which is attached between the tab and the two presser plates 2.
are pulled toward each other, and the tips of the presser plates 2 approach each other. As the tip approaches, the distance between the magnet switches 6 attached to the P presser plate 2 becomes shorter, and the magnet switches 6 are turned on.

Although the above is just one embodiment, a wide variety of functions can be obtained by changing the material of the softening resin 4.

For example, when the water or chemical solution reaches the softening resin 4, it is possible to use a material that softens or dissolves immediately, or to use a material that takes some time to completely soften and dissolve.
It becomes possible to control the time until detection.

In addition, when the amount of leakage of water or chemical solution is small, the softening resin 4 does not completely soften and dissolve, but if a material is used that softens and dissolves only when a large amount leaks, the problem will depend on the size of the leakage amount. It also becomes possible to detect and distinguish.

On the other hand, the magnetic switch 6, which is mounted on the upper part of the holding plate 2, functions even if other types of switches, such as limit switches, microswitches, or photoswitches, are installed. i, obtained. contraction spring 5
Not limited to helical springs, but also other types of springs, or
Force may always be applied to the presser plate 2 using a cylinder or the like.

In this manner, the present detector can detect leakage of water or chemical solutions regardless of the amount of leakage, and can also detect leakage of liquids with very poor conductivity such as ultrapure water. Furthermore, by changing the material and shape of the softening resin 3, it can be applied to a wide variety of chemical solutions, and the time until detection can be controlled, so it has the advantage of being able to be used in equipment and plant equipment in all fields. be.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, 1...pin, 2...
Pressed plate, 3... Teflon rod 4... Soft resin, bottom... Contraction spring, 6... Magnet switch, 7... The handle is metal fittings, 8...
...It is a saucer. Mayu 1st ward

Claims (1)

[Claims] Place the bottle at the intersection of the two presser plates/Ii! iL,,2
A contraction spring is provided between the presser plates at one end of the presser plates to attract the presser plates to each other, and when the presser plates approach each other, an electrical device that can generate an electrical signal is attached to the other end of the presser plate. A liquid leakage detector characterized in that it has a mechanism in which the mounting is fixed by the force of a contraction spring of a softening tree.