JPS6146772B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting leakage in a liquid storage tank such as a swimming pool.

Liquid storage tanks are widely used in various fields including chemical plants, but depending on the internal conditions, it may be necessary to detect and repair leakage points without draining the fluid inside the tank.

For example, austenitic stainless steel lining is used to store liquids containing substances harmful to the human body stored for chemical processing or temporary storage, or liquids containing dangerous substances that may cause an explosion. However, if a leak occurs when liquid containing substances harmful to the human body is stored in the tank, the liquid in the tank should be removed and the leak location detected and repaired. may be in situations where it is impossible, or even if it is not impossible, it may be difficult to handle. Therefore, in such cases, there is a need for a method that enables detection and repair of leakage points in the storage tank without removing the liquid in the tank, and the present invention has been proposed in view of these circumstances. The liquid adjacent to the inner surface of the tank is isolated from other liquids by an isolation box that cooperates with the inner surface, and by detecting a drop in the water level due to leakage, it is possible to easily and accurately detect the drop in water level without removing the stored liquid. The purpose of the present invention is to provide a device for detecting the location and extent of leakage.

The present invention will be described below based on an illustrated embodiment, but the present invention is not limited thereto.

FIG. 1 is an overall perspective view showing the installed state of this embodiment, and FIG. 2 is a sectional view thereof.

In the figure, a tank or pulley 10 containing a liquid or water 1 to a height indicated by 2 has steel linings 14, 15 attached to the inner surfaces of the concrete side walls 11 and bottom 12 of the tank or pulley 10.

The isolation box 20 suspended from a hanging device (not shown) via a rope 18 has an opening 22 facing the inner surface of the side wall 11 and an internal space 23 formed therein.

Two pipes 33 and 34 perpendicularly penetrate and are fixed to retaining plates 31 and 32 extending parallel to the side wall 11 and in opposite directions from the outer surface of the isolation box 20, respectively. Suction cups 36 and 37 that stick to the pipes 33 and 34 are fitted to the open ends of the pipes 33 and 34, respectively.

A collecting pipe 35 connected to the pipes 33 and 34 communicates with an air-operated pump 39 via a flexible pipe or vinyl hose 38. After all, 36 suckers,
The inside of 37 is connected to a pump 39, and when the pump 39 is operated, water in the suction cups 36, 37 is removed and the suction cups 36, 37 stick to the lining 14, or water is put in and the suction cups 36, 37 are attached to the lining 14.
move away from

That is, the holding plates 31, 32, the pipes 33, 3
4, the collecting pipe 35, the suction cups 36, 37, the vinyl hose 38, and the pump 39 constitute the holding device 30. The pump 39 is provided with a discharge pipe or the like which is appropriately placed outside the pool 10 and whose tip is inserted into the water 1.

Water level gauge 4 composed of a transparent hard tube and equipped with a scale
0 penetrates the back surface of the isolation box 20 in a watertight manner to communicate with the internal space 23, and is fixed to the isolation box 20 by a support rod (not shown) extending in the vertical direction.

The height of the water level gauge 40 is selected so that the upper end 41 does not sink below the water surface even when the isolation box 20 is set at the lowest position, and the upper end 41 always looks above the water surface.

A sealing member, that is, a soft gasket 50 is attached to the flange surrounding the opening 22 of the isolation box 20, and when the isolation box 20 is pressed against the surface of the lining 14, it is slightly deformed and drains the water in the internal space 23 from outside water. Separate from

By using the device of this embodiment having the above-mentioned configuration, pool 1
The procedure for detecting the location of leakage in the lining 14 of the side wall 11 of 0 is as follows.

Place the pump 39 as shown, gradually lower the isolation box 20 suspended by the rope 18,
The position of the isolation box 20 is determined by the scale attached to the rope 18, and when it reaches a predetermined position (depth), the descent is stopped, and the suction cups 36, 37 of the holding device 30 are moved close to the lining 14 and oriented. At the same time, when the pump 39 is operated to discharge the water in the suction cups 36 and 37,
The reverse plates 36 and 37 stick to the lining 14 and fix the isolation box 20 with the opening 22 facing the lining 14.

If there is a leak in the part of the lining 14 surrounded by the isolation box 20, the water level on the water level gauge 40 will drop due to water leakage, and the presence, location, and extent of the leak can be detected from this drop in water level. be done.

To move the isolation box 20 to another location (vertically or horizontally), use the pump 39 to move the suction cups 36, 3
7 to solve its adsorption, and then moved and fixed according to the procedure described above.

To detect leakage on the entire surface of the lining 14,
The isolation box 20 is moved vertically in steps so that the upper and lower ends of the surfaces to be inspected slightly overlap.
The detection procedure described above is performed each time the fixation is performed, and the detection work is then performed by moving the adjacent horizontal position in the vertical direction as described above.

The rope 18 and the hanging device are connected to an isolation box 20.
It is used to lower and raise the isolation box, and constitutes a lifting device, but the lifting device may have other configurations, such as one that supports the isolation box from the side or from below and moves it up and down.

As described above, according to this embodiment, pool 1
Isolation box 20 placed in water 1 with lining 1
4 to partially isolate the water adjacent to the lining 14 from the rest, detect a drop in the water level due to leakage in the isolation box 20, and detect the location and extent of the leak, so that the water 1 is removed from the pool 10. Leakage can be easily and reliably detected without evacuation.

The above embodiment is an example of a device used to detect leakage from the flat part of the sidewall of a swimming pool, but with slight modifications, it is also possible to detect leakage from the corners, bottom, etc. of the sidewall within the scope of the present invention. It will be readily understood by those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view of the embodiment. 1...Water, 10...Pulley, 11...Side wall, 1
4...Lining, 18...Rope, 20...Isolation box, 22...Opening, 23...Inner space, 30...
... Holding device, 31, 32 ... Holding plate, 33, 34
... Pipe, 35 ... Collection pipe, 36, 37 ... Suction cup, 38 ... Vinyl hose, 39 ... Air-operated pump, 40 ... Water level gauge, 50 ... Soft gasket.

Claims (1)

[Claims] 1. An isolation box placed in the storage liquid of a tank and selectively brought into close contact with the inner surface of the tank, a holding device that fixes the isolation box to the inner surface, a lifting device connected to the isolation box, and an outside of the isolation box. What is claimed is: 1. A leakage detection device for an inner surface of a tank, comprising a water level gauge that is erected and communicated with the inside of the isolation box, and an opening of the isolation box facing the inner surface is surrounded by a sealing member.