JP2004203409A - Vertical water storage tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical water storage tank capable of suppressing labor and costs to embed the tank underground to be low, and suppressing generation of dead water inside thereof. <P>SOLUTION: An inflow pipe 19 having an inlet 19a on a tip is inserted in a vertical water storage tank 10 so as to be brought close to a substantial center of a bottom wall 25 from an upper part of the tank 10, and the inflow pipe 19 extends in the vertical direction of the tank 10. The inflow pipe 19 is passed through a hole 23 in a rectifying plate 21 in a vicinity of the inlet 19a, and an outer circumferential portion of the inflow pipe 19 is welded to the hole 23 of the rectifying plate 21. A plurality of through holes 22 are formed in the rectifying plate 21. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vertical water storage tank.
[0002]
[Prior art]
The water storage tank has an inflow portion and an outflow portion of water, and it is known that dead water (water retention portion) is generated in the water storage tank. When this dead water occurs, there is a possibility that a problem may occur in securing water quality in the case of a water storage tank for drinking. For this reason, conventionally, a water storage tank provided with a rectifying member for stirring the internal water using a water flow has been considered so as to suppress the generation of the dead water (see Patent Document 1). And since such a water storage tank is large, when installing it on the ground, it was difficult to secure an installation place. For this reason, water storage tanks were often buried underground.
[0003]
[Patent Document 1]
Japanese Patent No. 2650022 (page 2-3, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the water storage tank described in Patent Literature 1, since it is a horizontally long tank, although the generation of dead water in the tank can be suppressed by the rectifying member, the excavation area of the ground is large when buried underground. Since it is necessary, there is a problem that labor and cost of excavation work are relatively large. To solve this problem, it is effective to make the water storage tank vertical, but it was difficult to eliminate dead water in the vertical water storage tank.
[0005]
The present invention has been made by paying attention to the problems existing in such a conventional technique. It is an object of the present invention to provide a vertical water storage tank that can reduce labor and cost when burying underground and can suppress generation of dead water inside.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the invention of claim 1, in a vertical water storage tank to which an inflow pipe and an outflow pipe of water are connected, the inflow pipe extends in a vertical direction of the tank, and the inside of the tank is A gist is provided near the bottom, and the inflow pipe penetrates a substantially central portion of the baffle, and the gist has a plurality of through holes.
[0007]
Therefore, since the straightening plate having a plurality of through holes is provided inside the tank, the water in the tank can be substantially uniformly dispersed. For this reason, even if it is a vertical water storage tank, generation of dead water in a tank can be controlled.
[0008]
According to a second aspect of the present invention, in the first aspect, the inflow port of the inflow pipe and the outflow port of the outflow pipe are located on opposite sides of the current plate. Things.
[0009]
Therefore, the water flowing in from the inflow port is surely dispersed by the current plate, and then flows out from the outflow port. For this reason, the generation of dead water in the tank can be effectively suppressed.
[0010]
According to a third aspect of the present invention, in the first or second aspect, the through holes are radially arranged.
Therefore, the same effect as the second aspect can be obtained.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0012]
First, the configuration of the vertical water storage tank 10 will be described.
As shown in FIG. 1, a vertical water storage tank 10 having a cylindrical shape as a whole is buried underground, and a concrete layer 11 is formed outside a main body wall 12. An entrance 24 having an openable / closable lid 15 is provided at an upper portion of the tank 10 so that the inside of the tank 10 can be moved in and out of the tank 10 when maintenance of the tank 10 is performed.
[0013]
Also, at the axial position of the vertical water storage tank 10, an inflow pipe 19 extending from an inflow-side water pipe (not shown) provided on the ground 16 is arranged so that the tank 10 extends in the vertical direction of the tank 10. 10 is inserted. At this time, the inflow pipe 19 is configured such that the inflow port 19 a provided at the tip thereof is close to the vicinity of the center of the bottom wall 25 of the tank 10. In the vicinity of the inflow port 19 a of the inflow pipe 19, a circular current plate 21 is externally fitted and fixed in a center hole 23. That is, near the inflow port 19 a of the inflow pipe 19, the inflow pipe 19 penetrates the hole 23 located at the center of the current plate 21, and the outer periphery of the inflow pipe 19 and the hole 23 of the current plate 21 are welded. Have been. At this time, a gap is provided between the outer peripheral portion 26 of the current plate 21 and the side wall 27 in the tank 10, and the gap is made as small as possible.
[0014]
The current plate 21 has a plurality of through holes 22, and the through holes 22 are radially arranged from the center of the current plate 21 toward the outer peripheral portion 26. The through holes 22 are arranged at regular intervals in the radiation direction of the current plate 21.
[0015]
Further, the tank 10 is provided with an outlet pipe 20 extending from an outlet water pipe (not shown) provided on the ground 16 such that the upper wall of the tank 10 extends in the vertical direction of the tank 10. 28 is inserted into the tank 10 at a projection 29 provided so as to protrude from a part of the tank 28. The outlet 20 a at the tip of the outlet pipe 20 is configured to be substantially the same height as the upper wall 28.
[0016]
Next, the operation and effect of suppressing the generation of dead water in the vertical water storage tank 10 configured as described above will be described.
The water 13 sent from the inflow side water pipe into the vertical water storage tank 10 is discharged from the inflow port 19 a through the inflow pipe 19. The discharged water 13 collides with the vicinity of the center of the bottom wall 25 and is dispersed in the direction from the center of the bottom wall 25 toward the outer periphery. After the water 13 spreads over the entire area between the current plate 21 and the bottom wall 25, the water 13 passes through the through holes 22 of the current plate 21 almost uniformly, so that the water 13 flows toward the upper wall 28 of the tank 10. Flows.
[0017]
In this manner, the flow of the water 13 from the bottom to the top in the tank 10 can suppress the generation of dead water in the tank 10. Then, the water in the tank 10 in which the generation of the dead water is suppressed is used as drinking water or the like by being guided from the outlet 20a through the outlet pipe 20 to the outlet water pipe.
[0018]
According to the embodiment described in detail above, the following effects are exhibited.
The water 13 discharged toward the bottom wall 25 can pass through the plurality of radially arranged through holes 22 provided in the current plate 21 substantially uniformly, and this is generated at this time. The generation of dead water in the tank 10 can be suppressed by the water flow. Further, since the inflow pipe 19 extends in the vertical direction of the tank 10, the tank can be formed in a vertically long shape. For this reason, when the tank 10 is buried underground, the ground cutting area is smaller than that of a horizontally long tank, so that the labor and cost of ground cutting work can be reduced.
[0019]
Since the inflow port 19a and the outflow port 20a are located on the opposite sides of the current plate 21, the water 13 flowing from the inflow port 19a surely passes through the current plate 21 and then flows out. 20a. For this reason, the water 13 in the tank 10 is dispersed over substantially the entire inside of the tank 10, so that the generation of dead water in the tank 10 can be suppressed.
[0020]
(Modification)
The present invention can be configured by modifying the above-described embodiment as follows.
[0021]
In the above-described embodiment, a low-cone member for promoting the dispersion of the water 13 is provided on the bottom wall 25 where the water 13 discharged from the inflow port 19a abuts.
In the above embodiment, the vertical water storage tank 10 is provided with a plurality of rectifying plates 21.
[0022]
As shown in FIG. 3, in the embodiment, the through holes 22 of the current plate 21 are arranged in a grid.
Next, technical ideas other than the claims that can be grasped from the embodiment will be additionally described below together with their effects.
[0023]
(1) The vertical water storage tank according to any one of claims 1 to 3, wherein a gap is provided between an outer peripheral portion of the current plate and a side wall of the tank.
Therefore, even in the gap between the outer peripheral portion of the current plate and the side wall, the water flows in the direction toward the water surface, so that dead water is generated near the corner between the bottom wall and the side wall where the dead water is easily generated. Can be suppressed.
[0024]
(2) The vertical water storage tank according to claim 1 or 2, wherein the through holes are arranged in a lattice.
Therefore, the same effect as the second aspect can be obtained.
[0025]
【The invention's effect】
As described above in detail, the present invention can provide a vertical water storage tank that can reduce labor and cost when burying underground and can suppress the generation of dead water inside. There is.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the entire vertical water storage tank of an embodiment; FIG. 2 is a front view of a current plate of the embodiment; FIG. 3 is a front view of a current plate of a modified example;
DESCRIPTION OF SYMBOLS 10 ... Vertical water storage tank, 11 ... Concrete layer, 12 ... Body wall, 13 ... Water, 14 ... Ladder, 15 ... Lid, 16 ... Ground, 19 ... Inflow pipe, 19a ... Inlet, 20 ... Outflow pipe, 20a ... Flow Outlet, 21: straightening plate, 22: through hole, 23: hole

Claims (3)

In a vertical water storage tank to which an inflow pipe and an outflow pipe of water are connected, the inflow pipe extends in a vertical direction of the tank, and includes a rectifying plate near a bottom inside the tank, and a substantially central portion of the rectifying plate is formed. A vertical water storage tank, wherein the inflow pipe penetrates, and the current plate has a plurality of through holes. The vertical water storage tank according to claim 1, wherein an inflow port of the inflow pipe and an outflow port of the outflow pipe are located on opposite sides of the current plate. The vertical water storage tank according to claim 1, wherein the through holes are radially arranged.

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