JPH10266284A - Water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a water storage tank from being destroyed even in case of oscillation being generated to the water level due to an earthquake by forming an opening in an upper wall or a side wall of the water storage tank having the free water level at the time of storing water, and forming the opening in such a way that the total opening area exceeds the specific magnification of opening area of a lead-in port to the water storage tank. SOLUTION: When the water level rises due to oscillation of stored water 20 in a water storage tank 1 caused by the generation of an earthquake, a float 25 rises to the water surface and pushes up an opening cover 21 through an opening cover setting-off member 24 to open an upper opening 19 of a side plate panel 3, and part of oscillating stored water 20 flows out to relax water hammer to a side part 16 of the water storage tank 1. When water is oscillated up to a top part 15, the opening cover 21 is opened by water hammer to relax shock to the top part 15. The total opening area of an upper wall or a side wall of the water storage tank 1 is to be over 50 times as large as opening area of a lead-in port to the water storage tank 1 so as to prevent the water storage tank 1 from being destroyed by the earthquake.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water storage tank, and more particularly to a water storage tank capable of avoiding the destruction of a free water surface due to a wave during an earthquake.

[0002]

2. Description of the Related Art For example, in order to supply water at a constant water pressure into a building and / or to always secure a certain amount or more of water, the inside or roof of the building and / or the outside of the building. Is provided with a water storage tank. Such a water storage tank has a main body formed of a metal material, a plastic material, wood, or the like, has a water inlet, an outlet, and a manhole, and has a free water surface when storing water.

[0003]

In such a water storage tank, when an earthquake occurs, the free water surface in the water storage tank shakes due to an earthquake or the like, and in particular, rolls, causing a wave on the water surface in the water storage tank. Occur. This wave phenomenon on the water surface is called a sloshing phenomenon.If the sloshing phenomenon is large, the water surface of the conventional water tank reaches the upper surface of the water tank, and the water tank is destroyed by the impact pressure caused by the water force. This has been considered a problem. An object of the present invention is to solve the problem related to the destruction of the water storage tank due to the shaking of the water surface caused by such an earthquake.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water tank which does not break even if the wall surface of the water tank is shaken by the occurrence of an earthquake. The water storage tank of the present invention is configured to discharge a part of the stored water from the upper part and / or the side wall of the water storage tank when the water surface of the storage water is shaken due to an earthquake or the like, and to reduce the impact pressure.

In other words, the water storage tank of the present invention has a water inlet, an outlet, a manhole, and a water storage tank having a free water surface at the time of water storage, and has an opening on an upper wall or a side wall or an upper wall and a side wall of the water storage tank. And a cover member is attached to the opening whose total area of the openings exceeds 50 times the opening area of the inlet to the water storage tank.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the term "water tank" is used not only for water tanks for water supply but also for miscellaneous water, hot water supply, air conditioning, fire extinguishing, etc. in addition to water tanks for water supply. It also means the reservoir used. In the present invention, the covering member attached to the opening provided in the water tank is, for example, similar to a conventional covering member, with the object of preventing the invasion of living things such as insects into the water tank and the contamination and deterioration of the stored water. A cover member attached to the opening of the water storage tank is provided to prevent the destruction of the water storage tank at the time of an earthquake, and a lid that can be opened by the wave of the stored water, for example, a lid member having high hermeticity And a covering member having water permeability, such as a net, a woven fabric, and a lattice.

In the present invention, when a lid member having a high sealing property is attached to the opening, it is preferable that the attachment mechanism of the lid member is a mechanism that allows the lid member to be opened by the wave of the stored water. When the water-permeable member is mounted on the opening, it is preferable that the water-permeable member is mounted so as not to come off even if the water of the stored water hits the opening. In the present invention, the lid member or the water-permeable member may be attached to all of the plurality of openings, or the lid member may be attached to a part of the plurality of openings, and the water-permeable member may be attached to the remaining openings.

In the present invention, if the total area of the opening in which the covering member is mounted is 50 times or more the opening area of the water inlet of the water storage tank, it is possible to prevent the destruction of the water storage tank due to the wave of the stored water. it can. However, when the total area of the opening in which the covering member is mounted is set to be 80 times or more the opening area of the water inlet of the water storage tank, it is possible to almost certainly prevent the water tank from being broken by the wave of the stored water. preferable. In the present invention, the opening can be partially formed also as an overflow pipe and can also be formed as a manhole for internal inspection, but is preferably formed separately from the overflow pipe and the manhole.

[0009]

According to the present invention, an opening is formed in the upper wall or the side wall or the upper wall and the side wall of the water tank, and the total area of the openings is equal to the opening area of the inlet to the water tank. Of 50
Since the water tank is formed more than twice, the water tank can be prevented from being broken by discharging a part of the water in the water tank from the opening in response to the rise in water level due to sloshing.

Further, in the water storage tank of the present invention, a highly airtight lid member is attached to the opening so as to be opened by the wave of the stored water. Water pollution and deterioration can be prevented.
The lid member is opened by the wave of the stored water, and a part of the stored water is discharged from the opened opening, so that the destruction of the water storage tank can be prevented. Furthermore, in the water tank of the present invention,
Since water-permeable members such as nets, woven fabrics, or grids are attached so that they do not easily fall off due to the waves of the stored water, a part of the stored water can pass through due to the waves of the stored water generated at the time of the earthquake. The water is discharged from the opening through the aqueous member, and the destruction of the water storage tank can be prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following examples and descriptions. . FIG. 1 is a schematic cross-sectional view schematically showing an example in which an opening lid is attached to an opening in a water storage tank according to one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view schematically showing an example in which a water-permeable covering member is attached to an opening in a water tank according to another embodiment of the present invention. In FIGS. 1 and 2, corresponding portions are denoted by the same reference numerals.

In the embodiment shown in FIG. 1, the ceiling 15, the side 16 and the bottom 17 of the water storage tank 1 are respectively
The side panel 3 and the bottom panel 4 are connected to each other by fixing them with nuts 14 'through fastening bolts 14 in fastening holes at respective ends. In this example, a manhole 18 having the inspection lid 5 is provided on the ceiling 15. The ceiling panel 2 on the outer periphery of the water storage tank has an opening lid 21 which is opened by receiving the impact of the shaking of the water surface at the time of the earthquake.
Are always mounted in a tight state by a sealing material 23 mounted on the outer periphery of the opening 19 provided in the ceiling panel 2.

In the present embodiment, the opening lid 21 is fixed to one end portion 22 'of a hinge member 22 formed in a rod shape by a fixing bolt 26 and a fixing nut 26'. Therefore, although the opening lid 21 is opened by the wave motion of the free water surface at the time of the earthquake, when the opening lid 21 is opened, since the opening lid 21 is attached to the hinge 22 ′ of the hinge 22, Even if it leaves the opening 19, it does not fly away. In this example, the hinge 22 is formed with a plate-shaped other end portion 22 ″ so that it does not fly away from the opening 19 even when the opening lid 21 is separated from the opening 19. And a fastening nut 14 '.

In this embodiment, an overflow pipe 6 is provided on the side panel 3 of the side portion 16 of the water storage tank 1, and an insect net 7 is provided at a lower end of the overflow pipe 6. An opening lid 21 having an opening and closing mechanism similar to that of the ceiling panel 2 is attached to the side panel 3 at the upper end of the side 16. In this example, the opening cover 2 is provided inside the opening cover 21 of the side panel 3 in conjunction with the floating of the float 25.
An opening lid push-up member 24 for pushing up 1 is connected, and when an earthquake occurs, the float rises due to the rise of the water surface due to the wave generated on the water surface and pushes the opening lid open.

In this embodiment, the ceiling panel 2 on the side 16 is
Between the end of the side panel 3 and the upper end of the side panel 3 is provided a connecting member 13 having a chevron cross section which is connected to the end of the ceiling panel on the one hand and to the upper end of the side panel 3 on the other.
Between the end of the bottom panel 4 on the side 16 side and the lower end of the side panel 3, a connecting member having a chevron cross-section that is connected to the end of the bottom panel 4 on the one hand and to the lower end of the side panel 3 on the other 1
3 are provided. In this example, the water storage tank 1 includes a gantry 8 fixed to a foundation 11 by anchor bolts 12.
It is put on.

This embodiment is configured as described above.
Due to the occurrence of the earthquake, the stored water 20 in the water storage tank 1 swings, and when the liquid level rises, the float 25 floats up and pushes up the opening lid 21 via the opening lid push-up member 24, The upper opening 19 of the side panel 3 is opened to allow a part of the oscillating stored water 20 to flow out, thereby reducing the impact of water on the side 16 of the water storage tank 1. When the water swings to the ceiling 15, the opening lid 21 is opened by the impact of the water, so that the impact of the water on the ceiling can be reduced. And, as a result, the water tank is not destroyed.

The water storage tank of the embodiment shown in FIG. 2 is an example of a water storage tank which can be opened to the atmosphere. Compared to the water storage tank of the embodiment shown in FIG. The difference is that a grid is attached instead. That is, openings 19 are provided in the ceiling panel 2 and the upper side panel 3 on the outer peripheral side of the water storage tank 1, respectively, and the mounting holes formed in the periphery of the opening 19 and in the frame portion of the grid 27 are respectively provided with the grids. The grid 27 is attached to the opening 19 by passing the holding bolt 28 and fixing it with the grid holding nut 28 ′.

In the water storage tank of the present embodiment, the storage water 20 in the water storage tank 1 fluctuates due to the occurrence of an earthquake, and the liquid level rises to the side 1.
6, a part of the oscillating stored water 20 flows out of the grid 27 attached to the upper opening of the side panel 3 and the opening 19 of the ceiling panel 2,
The impact of water on the side 16 of the water storage tank 1 can be reduced, and the water storage tank does not need to be destroyed.

[0019]

According to the present invention, an opening is formed in the upper wall or the side wall or the upper wall and the side wall of the water tank, and the total area of the openings is equal to the inlet of the water tank. It is formed with more than 50 times the opening area, so it has a simpler structure than conventional water tanks and is improved at low cost. It became possible to avoid.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view schematically showing an example in which an opening lid is attached to an opening in a water storage tank according to one embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view schematically showing an example in which a water-permeable covering member is attached to an opening in a water tank according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water storage tank 2 Top panel 3 Side panel 4 Bottom panel 5 Inspection cover 6 Overflow pipe 7 Insect repellent net 8 Mounting stand 9 Inlet 10 Outlet 11 Foundation 12 Anchor bolt 13 Connecting material 14 Fastening bolt 14 'Fastening nut 15 Ceiling part 16 Side Part 17 Bottom part 18 Manhole 19 Opening 20 Reservoir 21 Opening lid 22 Hinge 23 Sealing material 24 Push-up member 25 Float 26 Opening lid fastening bolt 26 'Opening lid fastening nut 27 Grid 28 Grid holding bolt 28' Grid holding nut

Claims (3)

[Claims] 1. A water inlet, an outlet, a manhole, and a storage tank having a free water surface when storing water, wherein an opening is formed in an upper wall or a side wall or an upper wall and a side wall of the storage tank. A water tank, wherein a cover member is attached to an opening whose total area of the openings exceeds 50 times the opening area of the inlet to the water tank. 2. The water storage tank according to claim 1, wherein the cover member attached to the opening is a lid that can be opened by a wave of the stored water. 3. The water tank according to claim 1, wherein the cover member attached to the opening has water permeability.