JPH08268495A - Water tank for measure to count earthquake disaster - Google Patents

Abstract

PURPOSE: To allow water in the entire region of a tank main body to uniformly flow to always ensure fresh water by arranging inflow and outflow pipes to both end parts of an oblong cylindrical water tank so as to turn them to the centers of the mirror plates on the inflow and outflow sides of the tank main body and arranging conical flow adjusting members to the center parts of the mirror plates. CONSTITUTION: The water flows in a water tank main body 11 at predetermined flow velocity under predetermined water pressure from the horizontal pipeline 12a of an inflow pipe 12 is guided to the top part of the conical flow adjusting member 15 arranged to the center part of a mirror plate 11a through an inflow gap 14 to be diffused along the conical surface of the member 15 and further diffused by the spherical surface of the mirror plate 11a to become water streams to flow. Water streams are generated in the entire region of the cross section of the tank main body 11 by this flow to prevent the deterioration of water quality caused by stagnation. On an outflow side, the water streams uniformly flowing over the entire region of the tank main body 11 are converged along the mirror plate 11b on the outflow side and this flowing water is further collected by a flow adjusting member 16 to be reversed and guided to an outflow pipe 13 to be discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a water tank for earthquake disaster prevention.

[0002]

Technical Background of the Invention The purpose and necessary functions of the water tank for earthquake disaster countermeasures are as follows. (1) Purpose of the water tank for earthquake countermeasures In the event of a disaster such as an earthquake, the supply of drinking water is stopped, and the water tank for earthquake countermeasures secures drinking water for residents until it is restored. To install. In some cases, it may also be used as water for digestion as an initial digestion in the event of a fire. (2) Necessary function of water tank for earthquake disaster prevention (a) It has earthquake resistance. (B) Drinking water can be reliably stored even in the event of an earthquake. (B) Even if the external pipeline is damaged, the water in the facility will not flow out and the sewage will not flow in. (B) There is no "deterioration of water quality due to retention" or "reduction of residual chlorine". That is, we can always store fresh drinking water,
Hygienic and safe. Appropriate inflow and outflow can be secured at all times, and the water quality required for tap water can be secured. (C) Water can be reliably supplied from the emergency water supply facility. (D) Piping around the water tank: A structure that can safely secure water in the water tank in the event of an earthquake, and a side pipe (bypass pipe) must be installed.
Provide a device with an emergency shutoff function to the inflow and outflow pipes. (E) According to established standards and standards. (3) Reservoir capacity (a) The amount of water required for the emergency water supply population is 3 liters per person per day. That is, in the case of installation at an evacuation site,
At least 2 days (the number of days required to stabilize the confusion caused by the earthquake). (B) The water storage capacity when used also as a water supply for firefighting shall be based on the standards for water supply for firefighting based on the provisions of the Fire Service Act.

[0003]

2. Description of the Related Art Based on the above technical background, an emergency drinking water storage tank has been proposed as disclosed in Japanese Utility Model Publication No. 6-22297. This water tank, as shown in Figure 7,
A nozzle 3 having a trumpet-like structure provided at the tip of an inflow pipe 2a and a running water pipe 2b arranged at both ends of a cylindrical water tank main body 1 with both ends hermetically sealed and installed horizontally is centered on an end plate 4 at the end of the water tank main body 1. The opening is toward the section and is symmetrically arranged with respect to the center of the water tank body.

[0004]

According to this water tank,
The water pressure and flow velocity of the flowing water flowing into the water storage tank main body 1 drop sharply from the straight pipe portion of the inflow pipe 2a to the nozzle 3 having the trumpet-like structure, and the water flow diffused by contacting the center of the end plate 4 is diffused. Due to the weakness, the flow of water at the corners of the head plate is poor, so that the water flow cannot be guided to the entire cross section of the water tank main body, and the water quality may be degraded due to stagnation.

An object of the present invention is to allow water in the corners of the inflow and outflow side end plates to reasonably flow by the omnidirectional diffusion and converging action of the conical straightening member and the diffusion and focus action of the end plate, and the water tank body. It is to ensure that the water in the entire area flows evenly and that fresh water is always available.

[0006]

The structure of the present invention which solves the problems of the prior art is a horizontally long cylindrical shape which is installed in a water supply line and is kept in a water-flowing state at normal times and has both end plates as end plate structures. The inflow of the water tank body to the both ends of the water tank body,
In the reservoir for earthquake disaster countermeasures in which the inflow and outflow pipes are arranged orthogonally toward the center of the outflow side head plate, the inflow water from the inflow pipe is radiated to the entire area of the inflow side head plate in the center of the inner surface of both head plates. A conical rectifying member having a conical structure for flowing water at the corners of the guide plate and for flowing water at the corners of the flow-out side plate, converging toward the center of the plate, and leading to the discharge tube; It is installed in the road and is maintained in a water-permeable state during normal times,
In a water tank for earthquake disasters, in which the inflow and outflow pipes are arranged at right angles to the center of the inflow and outflow side end plate of the water tank main body at both ends of the horizontally long cylindrical water tank main body with end plate structure At the inflow and outflow ends of the inflow pipe and outflow pipe, the inflow water from the inflow pipe is radially guided to the entire area of the inflow side end plate through the appropriate water gap to flow the water in the corner part of the end plate, while the outflow A rectifying member having a conical structure is attached to cause the water in the corners of the side end plate to flow and converge toward the center of the end plate to lead to the outflow pipe. The water guiding surface of the rectifying member having the conical structure is a concave arc surface. In addition, radial spiral means is provided on the surface of the rectifying member having the conical structure.

[0007]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a first embodiment of the water storage tank of the present invention, FIG. 2 is an enlarged cross-sectional view of an essential part of the first embodiment, and FIG.
FIG. 4 is an enlarged sectional view of a main part of the third embodiment, FIG. 5 is an enlarged cross-sectional view of a main part of the fourth embodiment, and FIG. 6 is a main part of the fifth embodiment. FIG.

A first embodiment will be described with reference to FIGS. Numeral 11 denotes a horizontally long cylindrical water tank main body having end plates 11a and 11b structured on the inflow side and the outflow side, and L is directed toward the center of the inflow side and outflow side end plates 11a and 11b of the water tank main body 11. The horizontal pipe lines 12a and 13a of the inflow pipe 12 and the outflow pipe 13 having a letter shape are provided to face each other via a required water gap 14. At the center of the inner surfaces of the two end plates 11a and 11b, the inflow water is led radially from the inflow pipe 12 to the entire region of the end plate 11a to flow the water at the end of the end plate 11a.
1 is provided with a straightening member 15 having a conical structure for guiding a water flow over the entire cross section. On the other hand, the water at the corners of the outflow-side end plate 11b flows and converges toward the center of the end plate 11b, and a conical rectifying member 16 having a conical structure that further converges and inverts the converged water and guides it to the outflow pipe 13 is provided. The apex of the rectifying member 16 is arranged on the center axis of the horizontal conduits 12a and 13a of the inflow pipe 12 and the outflow pipe 13. The inflow pipe 12 and the outflow pipe 13 are provided with a valve (not shown) having an emergency shutoff function in the inflow pipe 12 and the outflow pipe 13 so that water in the water tank main body 11 can be secured safely in the event of an earthquake.

[0009]

Description of the operation The operation of the first embodiment will be described. Water flowing in from the horizontal conduit 12a of the inflow pipe 12 at a predetermined water pressure and flow velocity is guided to the apex of the rectifying member 15 through the flowing water gap 14, diffused along the conical surface of the rectifying member 15, and the end plate. The spherical surface of 11a makes the water flow a further diffused, and the water in the corners of the end plate flows, and by the action of the rectifying member 15 and the reverse water flow b, a water flow is generated over the entire cross section of the water tank main body to prevent deterioration of water quality due to retention. To do. on the other hand,
On the outflow side, a water flow c that uniformly flows over the entire area of the water tank body is focused along the spherical surface of the outflow side end plate 11b, and this running water c is further collected by the rectifying member 16 to be reversed to the outflow pipe. It leads to 13 and flows out.

Next, a second embodiment shown in FIG. 3 will be described. In this embodiment, the conical surfaces of the flow regulating members 15 and 16 having the conical sectional shape shown in the first embodiment are concave arc surfaces 15a. According to this embodiment, the reversal water flow b is activated by the concave arc surface 15a, and the flow water can be further made uniform over the entire cross section of the water tank body.

In the third embodiment shown in FIG. 4, the inflow water from the inflow pipe 12 is supplied to the inflow and outflow ends of the inflow pipe and the outflow pipe through an appropriate flow gap 17 so as to cover the entire area of the inflow-side end plate 11a. Radial flow of water at the corners of the head plate radially, while flowing water at the corners of the outflow side head plate 11b to collect water by suction toward the center of the head plate 11b and guide the water to the outflow pipe 13. 18 is attached to the stay 19.
According to this embodiment, as in the first and second embodiments, there is no trouble in the production of attaching the rectifying members 15 and 16 to the center portions of the end plates 11a and 11b, and the production is easy. The water in the gap formed between the outside of the rectifying member 18 and the end plates 11a and 11b is sucked by the water flow a diffused along the end plate 11a and provided on the top of the rectifying member 18. The water flow d pushed by the water flow through the small diameter hole 20
Therefore, water does not stay in this gap.

In the fourth embodiment shown in FIG. 5, the conical surface of the rectifying member 18 having the conical cross section shown in the third embodiment has a concave arc shape 18a. According to this embodiment, the inversion water flow b can be activated by the concave arc surface 18a,
The homogenization of running water over the entire cross section of the water tank body is further improved.

The fifth embodiment shown in FIG.
It is applicable to all four embodiments, and the rectifying member 15,
Radial spiral ridges 21 are provided on the conical surfaces 16 and 18. According to this embodiment, the spiral running waters a and b are naturally generated, and further, the flow in the corners of the end plate and the water flow in the entire cross section of the water tank main body are made turbulent, so that the deterioration of the water quality due to the retention of water can be prevented. .

[0014]

As described above, according to the configuration of the present invention, the following effects can be achieved. (A) By disposing a rectifying member having a conical structure at the center of the end plate for the inlet and outlet of the inflow pipe and the outflow pipe, the running water is diffused or focused radially over the entire end plate, and water at the corners of the end plate is The water can be uniformly fluidized and the water in the entire cross section of the main body of the water storage tank can be fluidized, so that water can be stored without deterioration of water quality due to retention. (B) The rectification member is attached to the flowing water pipe or the outflow pipe, so that the production of the water tank main body can be simplified. (C) By forming the conical surface of the flow regulating member as a concave arc surface or a radial spiral means, the effect of diffusing flowing water can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first embodiment of a water storage tank of the present invention.

FIG. 2 is an enlarged sectional view of a main part of an inflow port of the first embodiment.

FIG. 3 is an enlarged sectional view of a main part of a second embodiment.

FIG. 4 is an enlarged sectional view of a main part of a third embodiment.

FIG. 5 is an enlarged cross-sectional view of a main part of the fourth embodiment.

FIG. 6 is a front view of the main part of the fifth embodiment.

FIG. 7 is a cross-sectional view showing a conventional water storage tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Reservoir main body 11a End plate 11b End plate 12 Inflow pipe 12a Horizontal pipe 13 Outflow pipe 13a Horizontal pipe 14 Flow gap 15 Rectifying member 15a Concave arc surface 16 Rectifying member 17 Flow gap 18 Rectifying member 19 Stay 20 Small diameter hole 21 Spiral projection Ridge a running water b inverted running water c water flow d water flow

Claims (4)

[Claims] 1. An inflow / outflow of a water storage tank main body at both ends of a horizontally long cylindrical water storage tank main body having a mirror plate structure at both ends while being installed in a water supply pipe and being normally kept in a water flowing state. In the water tank for earthquake disaster countermeasures in which the inflow and outflow pipes are arranged orthogonally toward the center of the side panel,
The inflow water from the inflow pipe is radially guided to the entire area of the inflow-side head plate, and the water at the corners of the head plate is made to flow. A water tank for earthquake countermeasures characterized by disposing a straightening member having a conical structure for guiding. 2. The inflow and outflow of the water storage tank main body to the both ends of a horizontally long cylindrical water storage tank main body which is installed in a water supply line and is kept in a water-flowing state in a normal state and whose both ends have end plate structures. In a water tank for earthquake disasters in which the inflow and outflow pipes are arranged orthogonally toward the center of the side end plate, the inflow of the inflow pipe and the outflow pipe,
At the outflow end, the inflow water from the inflow pipe is led radially to the entire area of the inflow-side head plate through an appropriate water gap to allow the water at the corner of the head plate to flow, while the water at the corner of the outflow-side head plate flows. A water tank for earthquake disaster countermeasures, comprising a rectifying member having a conical structure that converges toward the center of the head plate and leads to an outflow pipe. 3. The water tank for earthquake countermeasures according to claim 1, wherein the water guiding surface of the conical rectifying member is a concave arc surface. 4. The radial spiral means is provided on the surface of the conical straightening member.
The listed water tank for earthquake countermeasures.