JPS60243596A - Sloshing preventive device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an anti-sloshing device for general liquid storage containers and nuclear power plant fuel pools.

[Prior art and its problems]

When an external force such as an earthquake motion acts on a liquid storage tank, the liquid in the storage tank oscillates, and as it grows, an excessive force is applied to the side wall of the storage tank. As a result, there is a risk that the storage tank may be damaged or destroyed, or that the stored liquid may leak. Especially if the stored liquid contains petroleum or alcohol, there is a risk of a serious fire. Furthermore, in a fuel pool at a nuclear power plant, overflow of pool water due to fluctuations in the liquid level contaminates the fuel exchange floor, etc. around the pool with liquid containing radioactive substances.

[Purpose of the invention]

An object of the present invention is to provide a device that efficiently suppresses these liquid level fluctuations that occur due to earthquakes and the like.

[Key points of invention]

To achieve this objective, a sloshing suppression case is installed near the water surface of the reservoir. This case has the function of temporarily holding the liquid level that has risen due to sloshing, and releasing the held liquid at an arbitrary time, disrupting periodic liquid level fluctuations and suppressing sloshing. .

〔Effect of the invention〕

The liquid level that temporarily rises due to sloshing is held in a suppression case, and then released and allowed to fall on the opposite side of the sloshing phase.

This creates turbulence in the liquid, dispersing the energy of sloshing, and suppressing the growth of sloshing.

[Embodiments of the invention]

FIG. 1 shows an embodiment in which a sloshing suppression case l is installed on the wall surface of a storage tank. FIG. 2 is an enlarged view of the suppression case l. This suppression case 1 has no bottom plate, has an exhaust port 2 at the top, and is normally closed with an openable and closable rubber plate 3. FIG. 3 is shown to explain the operation of this device. (1) In normal times, the liquid level in the suppression case 1 and the liquid level in the storage tank are equal.

■Due to long-period seismic motion, the liquid level rises to the right, liquid flows into the right suppression case l, and the air inside is exhausted.

■Next, when seismic motion is applied in the opposite direction, the liquid level rises to the left. At this time, the liquid level in the right suppression case is kept at a high level because the rubber plate prevents air intake.

(2) When the oscillation grows sufficiently, air flows in from the lower part of the suppression case 1, and the liquid inside falls, causing disturbance to the oscillation and suppressing sloshing.

[Other embodiments of the invention]

FIG. 4 shows an embodiment in which the suppression case 1 is installed on the entire surface of the liquid storage area limited to the side wall 4, and greater suppression is possible. Furthermore, if a valve that opens and closes in conjunction with the liquid level is installed in the suppression case 1 instead of the rubber plate 3, more efficient suppression is possible. The same effect can be obtained whether the storage tank is rectangular or circular.

Moreover, if a lifting device is attached to the suppression case 1, installation is possible according to the liquid level.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view showing one embodiment of the present invention;
2 is a cross-sectional perspective view showing the sloshing suppression case of FIG. 1, FIG. 3 is a schematic diagram for explaining the operation of FIG. 1, and FIG. 4 is a perspective view 3 showing another embodiment of the present invention. It is a diagram. 1...Sloshing suppression case, 2...Exhaust port, 3
...Rubber plate, 4...Side wall. Representative Patent Attorney Kensuke Chika (and 1 other person) Figure 1 Figure 2

Claims (1)

[Claims] When sloshing occurs near the liquid level in general liquid storage containers and fuel pools at nuclear power plants, it has the function of temporarily holding the liquid level that has risen and releasing the held liquid level at any time. A sloshing prevention device characterized by having a sloshing prevention case installed.