JPH08268494A - Water tank for measure to counter earthwquak disaster - Google Patents

Abstract

PURPOSE: To prevent the stagnation causing the deterioration of water quality, in a water tank for a measure to counter an earthquake disaster having inflow and outflow pipes provided thereto, by arranging water guide pipes guiding water streams to the entire region of the cross section of a water tank main body through an inflow gap sucking water of the corner parts in the water tank main body in the vicinity of the inflow and outflow ports of the inflow and outflow pipes. CONSTITUTION: The water form an inflow pipe 12 flows in a water tank main body 11 through an inflow gap 14 and a sleeve pipe 15 and passes through the sleeve pipe 15 to be reduced in water pressure and flow velocity but, at this time, the water of the corner part of the mirror plate on an inflow side 11a is sucked from the inflow gap 14 by the flow velocity of the water passing through the inflow gap 14. Water streams are generated in the entire region of the cross section of the water tank main body 11 by this suction action and the inflow action from the end of the sleeve pipe 15 to prevent the deterioration of water quality caused by stagnation. In an outflow port 13a, water streams are converged to be emitted from an outflow pipe 13 through a sleeve pipe 15 and the water of the corner part of the mirror plate on an outflow side 11b is sucked from an inflow gap 14 to be introduced into an outflow pipe 13 without being stagnated.

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, a disaster countermeasure water storage tank as disclosed in Japanese Utility Model Publication No. 60-24777 has been proposed. In this water tank, as shown in FIG. 12, a cylindrical body 1 that is opened in the horizontal direction and an end body 2b having a tapered structure communicate with both ends 1a of the body 1,
A mouth end 2a having a smaller inner diameter than the body portion 1 is composed of two end portions 2 adapted to be connected to the water pipe 9, and the end portion main body is on a straight line connecting the mouth end 2a and both ends 1a of the body portion 1. 2b is located.

[0004]

According to this water tank,
Since the end body 2b is on the straight line connecting the terminal 1a of the body 1 and the mouth end 2a, there is no corner space in the end 2. Therefore, when tap water is supplied from one side of the water pipe 9 and discharged to the other side, there is no stagnation of tap water, so it is recognized that water quality in the water tank will not deteriorate, but when designing a water tank of the same capacity. In addition, there is a disadvantage that the water tank is enlarged compared to a water tank having a mirror plate structure on the inflow side and the outflow side, and when the diameter of the body portion 1 is increased, the water tank is further lengthened and there is a problem in volume.
Further, if the angle of the straight line connecting the terminal 1a and the mouth end 2a of the body portion 1 becomes large, the stagnation of tap water occurs, so that it is difficult to set the proper angle.

An object of the present invention is to flow water in a corner portion of a water tank main body near an inflow port and an outflow port, and to uniformly keep the entire flow in the water tank so as to rationally prevent retention which causes water quality deterioration. , Always to ensure fresh water.

[0006]

The structure of the present invention, which solves the problems of the prior art, is installed in a water supply line so as to be kept in a water-passing state at normal times, and the inflow side and outflow side end plate center parts In a water tank for disaster preparedness in which an inflow pipe and an outflow pipe are provided, the inflow pipe and the outflow pipe are located near the inflow port and the outflow port, along the central axis of the inflow pipe and the outflow pipe, and in the inner corner of the water storage tank main body. A required length of water conduit that guides the water flow through the cross section of the water tank main body through the water gap that sucks the water of the section is installed, and it is installed in the water supply pipeline so that it can be maintained in the normal water flow state. In a water tank for earthquake disasters in which an inflow pipe and an outflow pipe are provided at the central portions of the inflow side and outflow side end plates, the inflow pipe and the outflow pipe are projected into the water storage tank main body for a required length, and are provided outside the projecting portion. , Along the central axis of this, and through the running water gap that sucks water in the corner of the water tank body A water conduit with a required length that guides the water flow across the entire cross section of the water tank is installed, and it is installed in the water supply conduit so that it can be kept in a water-flowing state at normal times. In a water tank for disaster prevention provided with an outflow pipe, a small diameter straight pipe portion that intervenes in the inflow port near the inflow port of the inflow pipe and the running water is spread to a corner of the water tank main body, and A water conduit having a conical portion that guides the water flow is arranged over the entire cross section of the main body, while a small diameter straight pipe part that intervenes in the outlet and guides the water flow near the outlet of the outflow pipe, and a corner of the main body of the water tank. A water conduit having a conical portion for guiding the water of the above into the outflow pipe, and inflowing near the inflow port and near the outflow port,
It is provided with a different type of water conduit suitable for the outflow action.

[0007]

Embodiments of the present invention will be described in detail with reference to the drawings. 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 an inlet portion of the first embodiment, and FIG. 3 is an enlarged sectional view of an inlet water conduit of a second embodiment. FIG. 4 is an enlarged sectional view of the inlet water conduit of the third embodiment, FIG. 5 is an enlarged sectional view of the inlet water conduit of the fourth embodiment, and FIG. 6 is an enlarged sectional view of the inlet water conduit of the fifth embodiment. FIG. 7 is an enlarged sectional view of an inlet conduit of the sixth embodiment, FIG. 8 is an enlarged sectional view of an inlet conduit of the seventh embodiment, and FIG. 9 is an enlarged sectional view of an inlet pipe of the eighth embodiment. Figure 1
0 is an enlarged sectional view of the introduction pipe of the ninth embodiment, and FIG.
It is an expanded sectional view of the inflow pipe of an example.

A first embodiment will be described with reference to FIGS. Reference numeral 11 denotes a horizontally long cylindrical water tank body in which the inflow side 11a and the outflow side 11b have a mirror plate structure, and the inflow pipe 1 is provided at the center of the inflow side 11a and the outflow side 11b of the mirror plate structure.
2 and the outflow pipe 13 are connected to each other. The inflow pipe 12 and the outflow pipe 13 constitute a bypass pipe (not shown) so that the water in the water storage tank body 11 can be safely secured in the event of an earthquake. A valve (not shown) having a shutoff function is provided. Then, the water in the corner portion of the end plate of the water tank body 11 is sucked into the water tank body 11 near the inflow port 12a and the outflow port 13a formed in the connection portion of the water tank body 11 with the inflow pipe 12 and the outflow pipe 13. A sleeve pipe 15 having a straight cylindrical structure and having a diameter substantially the same as the diameter of the inflow pipe 12 and the outflow pipe 13 is arranged through a required flowing water gap 14. The length of the sleeve pipe 15 is selected to be an appropriate length in consideration of water pressure and flow velocity, and the inflow pipe 12 and the outflow pipe 1 are
3 is so arranged on the central axis line. Reference numeral 16 in the drawing denotes a stay for attaching the sleeve pipe.

[0009]

Description of the operation The operation of the first embodiment will be described. Water flowing from the inflow pipe 12 into the water tank body 11 with a predetermined water pressure flows into the water tank body 11 through the flowing water gap 14 and the sleeve pipe 15, and when passing the sleeve pipe 15, the water pressure and the flow velocity are weakened. According to the flow velocity when passing through the flowing water gap 14, the water in the end plate corner of the inflow side 11a is sucked from the flowing water gap 14 as shown by the arrow a, and the suction action and the arrow b flowing from the end of the sleeve pipe 15 are drawn. By the flowing water action in the direction, a water flow indicated by an arrow c in FIG. 1 is generated in the entire cross section of the water storage tank main body to cause the water to flow over the entire water storage tank main body 11 and prevent the deterioration of water due to retention. On the other hand, at the outlet 12a, the water flow indicated by the arrow c is converged and discharged from the outflow pipe 13 via the sleeve pipe 15 as indicated by the arrow d, and the water in the corner of the end plate 11b side of the outflow side 11b is discharged from the running water gap 14. It is sucked and introduced into the outflow pipe 13 without staying.

Next, a second embodiment shown in FIG. 3 will be described. This embodiment corresponds to the sleeve tube 1 shown in the first embodiment.
The sleeve pipe 15a for forming the diameter 5 of the pipe 5 is slightly larger than the diameters of the inflow pipe 12 and the outflow pipe 13, and the other structure is the same as that of the first embodiment. The detailed description is omitted by attaching the reference numeral. Regarding the explanation of the action, although a slight decrease in water pressure and water flow is recognized in the sleeve pipe 15a portion as compared with the first embodiment, the other water flow distribution action is the same as that of the first embodiment, so a detailed explanation will be given. Is omitted.

In the third embodiment shown in FIG. 4, a sleeve tube 15b having an inverted truncated cone cylindrical structure having an outer end base portion having substantially the same diameter as the inflow pipe 12 and the outflow pipe 13 and an inner end expanded. Since the other structures are the same as those of the first embodiment, the same structural parts are denoted by the same reference numerals and detailed description thereof will be omitted. For the explanation of the action, see the water flow gap 14
The suction action of water by means of is the same as that of the first embodiment, but since the sleeve pipe 15b has an inverted truncated conical tubular structure, the water flow diffusion efficiency at the outlet side of the sleeve pipe 15b is good and the water flow over the entire cross section of the water tank body is good. The uniformity of action is further improved, and
The efficiency of collecting water into the outflow pipe 13 can be improved.

In the fourth embodiment shown in FIG. 5, the inflow port 12a,
In the vicinity of the outlet 13a portion, a straight pipe portion 17 whose outer end base has a diameter substantially the same as the diameters of the inflow pipe 12 and the outflow pipe 13 via a flowing water gap 14.
And a sleeve tube 15c constituted by a tapered tube portion 18 whose inner end is expanded. The same reference numerals are given to the same structural parts as in the first embodiment. As for the operation of this embodiment, the water flow effect described in the first and third embodiments can be obtained, and the uniform water flow effect over the entire cross section of the water tank main body can be improved.

Next, the fifth embodiment shown in FIG. 6 will be described. In this embodiment, the inflow pipe 12 and the outflow pipe 13 are projected into the water tank body 11 by a predetermined length, and the outer side of the protruding portion 19 is provided. In addition, a base portion of a sleeve tube 15d having a truncated conical tubular structure having a large outer end and a small inner end is fittedly disposed through a running water gap 20. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. According to this embodiment, the flow velocity of the water flow discharged from the end portion of the inflow pipe 12 is increased by the action of the sleeve pipe 15d, and the water flow gap 20 is discharged from the water flow gap 20 as compared with the water flow gap 14 of the first to fourth embodiments described above. Suction flow rate increases, and the inflow side 11a
The water in the corners of the end plate is more efficiently flowed. Outflow side 1
1b has some problems in the outflow efficiency, but preferably has a low outflow resistance, and more specifically, it is desirable to use a sleeve pipe structure described in the next sixth embodiment.

A sixth embodiment shown in FIG. 7 has an inverted structure of the sleeve tube 15d of the fifth embodiment, more specifically, an inverted truncated cone having a smaller outer end side and a larger outer end side. The sleeve tube 15e having the diameter structure is provided with the protruding portion 19 through the running water gap 20.
It is arranged on the outer side of. According to this embodiment,
Compared with the first to fourth embodiments, the suction flow velocity from the running water gap 20 is increased, an enlarged water flow is obtained from the inner end of the sleeve pipe 15e, and the uniform water flow over the entire cross section of the water tank main body. And the outflow efficiency can be improved.

In the seventh embodiment shown in FIG. 8, a sleeve pipe 15 having a straight pipe structure is provided on the outer side of the protruding portion 19 with a running water gap 20 interposed therebetween.
f is provided. According to this embodiment,
A suction action of water having a suction force higher than that of the flowing water gap 14 of the fourth embodiment is obtained, and the water pressure and the flow velocity flowing from the inflow pipe 12 are directly sent into the water tank main body 11 without being increased or decreased. Combined with the suction action, a uniform water flow can be obtained over the entire cross section of the water tank body. According to this embodiment, the sleeve tube 15f having the same structure can be used for the outlet 13a.

Next, the details of the eighth embodiment will be described with reference to FIG. In this embodiment, a sleeve pipe 15g including a straight pipe portion 21 having a diameter slightly smaller than the diameters of the inflow pipe 12 and the outflow pipe 13 and a tapered pipe portion 22 whose inner end is expanded to a large diameter is formed. The base portion of the straight pipe portion 21 of the sleeve pipe 15g is inserted into the inflow pipe 12 and the outflow pipe 13, and the inflow pipe 12,
A concentric circular water gap 23 is formed between the outflow pipe 13 and the straight pipe portion 21. According to this embodiment, the water flow flowing from the inflow pipe 12 into the water tank body 11 is divided into the straight pipe portion 21 of the sleeve pipe 15g and the running water gap 23,
The water flow passing through the sleeve pipe 15g is divided into a straight flow and a diffusion flow, and the water passing through the running water gap 23 is diffused through the outside of the tapered pipe portion 22 and the water in the corner of the end plate of the inflow side 11a is diffused. Due to the action of the flowing water flow, a uniform water flow is generated over the entire cross section of the water tank main body. According to this embodiment, the sleeve tube 15g having the same structure is provided at the outlet 13a.
Is provided to obtain a smooth focused outflow of water.

The ninth embodiment shown in FIG. 10 is a sleeve 15h obtained by downsizing the sleeve tube 15g shown in the eighth embodiment.
The sleeve pipe 15h is miniaturized to increase the flow gap 23 between the flow pipe 12 and the flow pipe 12. Then, another sleeve pipe 1 including a straight pipe portion 24 and a tapered pipe portion 25 is provided in the middle of the increased running water gap 23.
5i is provided. That is, the sleeve tube 15
Another sleeve pipe 15i is arranged outside of h with an appropriate interval, and the subdivided running water gaps 26, 27 are formed. Reference numeral 28 in the drawing denotes a stay for maintaining a distance having a rectifying function. According to this embodiment, the flowing water gap 23 is divided and the flowing water gaps 26 and 27 are formed, so that the flow action of water at the corners of the inflow side end plate is increased, and the sleeve tubes 15h and 15i are doubled. Due to the water flow action of the structure, the uniformity of the water flow action over the entire cross section of the water tank body can be further enhanced. According to this embodiment, the sleeve pipes 15h and 15i having the same structure are arranged also in the outflow port 13a, and a smooth focused outflow of water can be obtained.

In the tenth embodiment shown in FIG. 11, the straight pipe portion 24 of the outer sleeve pipe 15i shown in the ninth embodiment shown in FIG. 10 is eliminated, and the downstream of the relatively large flowing water gap 23 is eliminated. The partial flow path is divided into two parts only by the tapered pipe part 25. According to this embodiment, the water flow passing through the running water gap 23 is enhanced in the tapered pipe portion 25, the flow action of the corner portion of the inflow side end plate is enhanced, and this is combined with the diffusion action of the water flow passing through the sleeve pipe 15h. As a result, a uniform water flow action is obtained over the entire cross section of the water tank body. Sleeve tube 15h of this embodiment
The structure is used for the outlet 13a, and the effect of flowing water is obtained at the outlet.

The sleeve pipe structures shown in the embodiments of the present invention are all arranged near the inflow port to obtain a good effect. However, when these sleeve pipes are installed near the water outflow port, they are effective. In some cases, it may not be possible to obtain, for example, FIG. 4, FIG. 5, FIG. 7, FIG. 9, FIG.
It is desirable to use a sleeve tube having a low outflow resistance as shown in FIG.

[0020]

As described above, according to the structure of the present invention, the following effects can be obtained. (A) Since the water guide pipe (sleeve pipe) is disposed near the inflow and outflow ports of the inflow pipe and the outflow pipe through the water flow gap, the end plate is moved from the water flow gap to the end plate by the action of the inflow water and the outflow water flowing through the water flow pipe. The water in the corners can be forcibly sucked and flowed, and this suction action and the diffusion action of the water flow by the water guide pipe cause a water flow over the entire cross section of the water tank main body, and the water retention in the water tank is rationalized. It is possible to prevent the deterioration of water quality in the water storage tank and provide high quality drinking water in the event of a disaster such as an earthquake. (B) By projecting the inflow pipe into the water storage tank and disposing the water guiding pipe on the outer side of the protruding portion through the running water gap, it is possible to further increase the suction action of water from the running water gap,
Due to the water suction action and the water diffusion action through the water conduit, a more uniform water flow can be generated over the entire cross section of the water tank body, and the efficiency of preventing deterioration of water quality can be improved. (C) A small-diameter straight pipe portion that intervenes in the inlet and a conical portion (tapered pipe portion) that diffuses the water flow near the inlet of the inlet pipe
In addition to arranging a water pipe with a pipe, a water pipe with the same structure is installed near the outflow port of the outflow pipe, and running water concentric with the straight pipe part on the outer periphery of the straight pipe part inserted into the inflow port and outflow port. Since the gap is formed, the running water is divided into the water flow passing through the water conduit and the running water passing through the running water gap, particularly activating the movement of water at the corner of the end plate,
Due to the water flow action and the conical diffusion action, a uniform water flow is generated in the entire cross section of the water tank main body, and water quality control without water retention in the water tank main body can be reasonably performed. (D) By disposing different water conduits suitable for inflow and outflow near the inlet and outlet, the inflow and outflow efficiency can be improved, and the retention of water in the water tank body can be improved. No water quality management can be done reasonably.

[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 an inflow port portion of the first embodiment.

FIG. 3 is an enlarged cross-sectional view of an inlet water conduit of the second embodiment.

FIG. 4 is an enlarged sectional view of an inlet water conduit according to a third embodiment.

FIG. 5 is an enlarged sectional view of an inlet water conduit according to a fourth embodiment.

FIG. 6 is an enlarged sectional view of an inlet water conduit of the fifth embodiment.

FIG. 7 is an enlarged sectional view of an inlet water pipe of a sixth embodiment.

FIG. 8 is an enlarged sectional view of an inlet water conduit of a seventh embodiment.

FIG. 9 is an enlarged sectional view of an introduction pipe of an eighth embodiment.

FIG. 10 is an enlarged sectional view of an introduction pipe of a ninth embodiment.

FIG. 11 is an enlarged sectional view of an inlet water pipe of a tenth embodiment.

FIG. 12 is a cross-sectional view showing a conventional water storage tank.

[Explanation of Codes] 11 water tank body 11a inflow side 11b outflow side 12 inflow pipe 12a inflow port 13 outflow pipe 13a outflow port 14 flowing water gap 15 sleeve pipe 15a sleeve pipe 15b sleeve pipe 15c sleeve pipe 15d sleeve pipe 15e sleeve pipe 15f sleeve sleeve Pipe 15g Sleeve pipe 15h Sleeve pipe 15i Sleeve pipe 16 Stay 17 Straight pipe part 18 Tapered pipe part 19 Projection part 20 Flow gap 21 Straight pipe part 22 Taper pipe part 23 Flow gap 24 Straight pipe part 25 Taper pipe part 26 Flow water gap 27 Flow water Gap 28 Stay a Water flow b Water flow c Water flow d Water flow

Claims (4)

[Claims] 1. In a water tank for earthquake disasters, which is installed in a water supply line so that water is kept flowing during normal times, and an inflow pipe and an outflow pipe are provided at the center of the inflow side and outflow side end plates, In the vicinity of the inlet and outlet of the inflow pipe and the outflow pipe, along the central axis of the inflow pipe and the outflow pipe, and across the entire cross section of the water tank main body through a running water gap for sucking water in the corner of the water tank main body. A water tank for earthquake disasters, which is equipped with a water conduit of the required length to guide the water flow. 2. A water tank for earthquake disasters, which is installed in a water supply line so that water is kept flowing during normal times, and an inflow pipe and an outflow pipe are provided at the center of the inflow side and outflow side end plates, The inflow pipe and the outflow pipe are projected into the main body of the water tank for a required length, and are arranged outside the projection along the central axis of the projection, and
A water tank for earthquake disasters, characterized in that a water guide pipe of a required length is provided to guide the water flow to the entire cross section of the water tank body through a running water gap that sucks water in the inner corner of the water tank body. 3. A water tank for earthquake disasters, which is installed in a water supply line so that water can be maintained in a normal state and provided with an inflow pipe and an outflow pipe at the center of the inflow side and outflow side end plate, In the vicinity of the inflow port of the inflow pipe, a small-diameter straight pipe portion that intervenes in the inflow port, and a water conduit having a conical portion that spreads the running water to the corner of the water tank main body and guides the water flow over the entire cross section of the water tank main body. On the other hand, in the vicinity of the outflow port of the outflow pipe, a water guide pipe having a small diameter straight pipe portion that intervenes in the outflow port and guides the water flow, and a conical portion that guides the water at the corner of the water tank body to the outflow pipe. A water tank for earthquake disasters that is equipped with 4. Inflow near the inflow port and near the outflow port,
The water tank for earthquake disaster prevention according to claim 1, wherein a different type of water conduit suitable for outflow action is arranged.