JPS61104990A - Liquid-surface rocking inhibitor - 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 [Substantive Field of the Invention] This publication R, 81 (Relates to a liquid level fluctuation suppressing device in general liquid storage: a tank and liquid cargo handling equipment f).

[Technical background of the invention and one point] When natural forces such as earthquake force are applied to the liquid storage tank.

If it matches the natural period of the liquid level fluctuation in the storage tank.

The liquid surface ripples greatly, and its growth causes damage to the ceiling of the storage tank, leakage of stored liquid, and damage to the foundation that supports the storage tank. If this is a tank for oil, alcohol, etc., μ
, and can cause a large fire. Furthermore, in the case of liquid storage tanks containing radioactive materials in nuclear power plants, damage or leakage of the liquid is extremely dangerous.

In addition, in cargo handling equipment that transports liquid, such as a tank truck (1 oil tanker), vibrations during transport cause the liquid stored in the storage tank to sway, which disturbs the stability of the vehicle or ship. Driving concerns may interfere with navigation.

[Purpose of the invention]

It is an object of the present invention to provide a device for suppressing liquid level fluctuations in a liquid cargo handling device caused by liquid level fluctuations caused by earthquakes, etc. and vibrations during transportation.5 [Summary of the Invention] This purpose In order to achieve this, a check type opening/closing device that opens only in one direction is installed in the storage tank in a direction that opposes the flow of the stored liquid due to rocking. As a result, the flow of the stored liquid is regulated in any direction, and fluctuations in the liquid level are kept low.

〔Effect of the invention〕

Fluctuations in the liquid level, especially primary fluctuations, form a large flow of stored liquid in the direction of the vibration. If an opening/closing plate that opens only in an arbitrary direction is attached to this flow, the swing will occur on the long period side in the direction where the flow is allowed, and will occur on the short period side in the direction where the flow is regulated. For this reason, the natural frequency of the fluctuation of the liquid level in the storage tank is disturbed, and the flow of the stored liquid is also disturbed, so that the fluctuation of the liquid level is suppressed to a low level.

[Embodiments of the invention]

FIG. 1 shows an embodiment in which an opening/closing plate 1 is installed in a liquid cargo handling device. This is a cross-sectional view of the tank 4 viewed from the side, with one opening/closing plate attached to the top and bottom, two stages, and two places on the left and right by partition members 5, and can only be opened toward the center.

Please note that the lower part of each opening/closing plate is in communication, allowing the storage liquid 2 to enter and exit freely. Normally, the chambers partitioned by the opening/closing plate maintain the same liquid level. Figures 2 and 3 show the equipment. Indicates the operating status.

When this tank is accelerated in the right direction A in Figure 2, the stored liquid becomes
Although it flows to the left side B, the flow of the stored liquid is regulated by the left opening/closing plate, so the stored liquid is raised at the left end of the tank and the position of the left opening/closing plate.

In FIG. 3, when the acceleration ends, the stored liquid waves back in the opposite direction, and the stored liquid flows to the right. At this time, the right side opening/closing plate closes and the left side opens, causing a mixture of long-period side rocking of the center of the tank and either left or right side, and short-period side rocking of the left and right chambers. It becomes a shape. Therefore, the natural period is disturbed and the liquid level fluctuation is suppressed.

[Other embodiments of the invention]

Figures 4 to 7 show the installation of this device in a cylindrical tank. In this embodiment, liquid level fluctuations caused by an earthquake or the like are converted into clockwise rotational motion by this device, and the natural period is disturbed and suppressed. In the case of Fig. 6% and Fig. 7, the opening/closing plate has a structure that opens only inward, and as in the above case, a single natural period is maintained, so that the vibration can be suppressed to a low level.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
Figures 3 and 3 are diagrams for explaining the operation of the present device shown in Figure W1, and Figures 4 to 7 are diagrams showing other embodiments. 1... Opening/closing plate 2... Liquid storage 4... Tank agent Patent attorney Kensuke Norichika (and one other person) Figure 1 Figure 3 Figure 4 Tree υ Figure 6 Figure 7

Claims (1)

[Claims] A liquid level fluctuation suppressing device characterized by regulating the flow of stored liquid in a tank in a certain fixed direction using a non-return type opening/closing device that opens only in one direction, and suppressing fluctuation by controlling the flow. .