JP3919087B2 - Water storage tank with contaminant discharge device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water storage tank that can prevent water from staying in a seismic water storage tank or the like for waterworks, and is provided with a means for discharging impurities that have flowed into the water storage tank.
[0002]
[Prior art]
As a water storage tank for use in an emergency such as an earthquake, a water storage tank having a pipe having a diameter larger than the diameter of the pipe is provided in the middle of the water supply pipe. This water tank is used as a part of a pipe line in normal times, and is used as a water tank by closing a valve at a connection part with the pipe line in an emergency.
[0003]
[Problems to be solved by the invention]
Although the water tank as described above is normally passed, the diameter of the water tank itself is larger than the diameter of the pipeline, so the water in the water tank is not sufficiently replaced, and the water tank is partially Some stagnation occurred, and water sometimes stayed there. When such water stays, it becomes so-called dead water, and there is a problem that the residual chlorine concentration decreases and the water quality deteriorates, so that it cannot be used for beverages. Various structures have been proposed to improve such a problem of retention. For example, what is described in Japanese Utility Model Laid-Open No.4-112092 is a flow control system in which a main water passage opening having a large cross-sectional area is provided on one side and a sub water passage opening having a small cross-sectional area is provided on the opposite side in the diameter direction. There has been proposed a water storage tank in which plates are arranged at appropriate intervals in the axial direction of the water storage tank so that main water opening positions are alternately positioned on the opposite side in the diameter direction of the tank body.
[0004]
In the water storage tank provided with the above-described flow control plate, the water flowing into the water storage tank meanders and flows through the main water flow opening, so that the water flow in the water tank body does not stagnate, and the main water flow Since a sub-water flow opening is also provided on the opposite side of the opening in the diameter direction, it is said that it is possible to eliminate a relatively small stagnation portion generated at the corner of the flow control plate. Various other techniques for preventing the occurrence of dead water by preventing stagnation in the water storage tank have been proposed.
[0005]
By the way, not only water but also foreign matters such as sand flow into the water tank. In a typical ductile iron seismic storage tank, the diameter of the reservoir is larger than the diameter of the distribution pipe, so the flow velocity inside the reservoir is significantly lower than the flow speed in the distribution pipe. Begins to flow slowly. For this reason, foreign substances such as sand and pebbles that have flowed in from the inflow pipe connected to the water tank gradually settled because the internal water flow is gentle, and the bottom of the water tank is not discharged to the outside from the water tank. To deposit.
[0006]
If contaminants accumulate in the water tank, there is a risk of deterioration of the water quality or a decrease in the water storage capacity, so the water in the water tank is completely drained every few years, and people enter the water tank. The water quality of the water storage tank is maintained and managed by directly discharging foreign substances such as sand. However, this method is very inefficient, and there is a problem that a person enters the water tank and is dangerous. Then, this invention makes it a subject to enable it to discharge | emit effectively and economically the foreign material which flowed and settled in the water tank.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following configuration. That is, the water storage tank according to the present invention is a water storage tank that is connected in the middle of a water distribution pipe and stores water for an emergency, and a water passage opening is partially formed inside the water storage tank. A plurality of flow control plates having a function of blocking the water flow at portions other than the portion are spaced apart from each other along the axial direction of the water storage tank so that the openings are alternately positioned at the upper and lower positions of the water storage tank. Installed in series, and provided with a drive device that can position all of the openings of the plurality of flow control plates on the lower side of the water tank by an external operation, and further, the outflow side end of the water tank Is characterized in that a discharge port is provided through which impurities that have moved can be discharged to the outside.
[0008]
In this water tank, a plurality of flow control plates are provided in series at intervals in the axial direction, and the openings that serve as water flow ports of the flow control plates are arranged alternately above and below. Therefore, at all times, flowing water meanders up and down in the water tank, and it is difficult for stagnation to occur in the water tank. In addition, sand and other contaminants that flow into the water tank settle at the bottom of the water tank, but the openings of all flow control plates are positioned on the lower side, that is, at the bottom of the water tank at appropriate intervals. By performing the operation, the inflowing water can flow along the bottom of the water storage tank, and sediments such as sand can be pushed away to the outlet side. What is necessary is just to discharge | emit the foreign material pushed away by the exit side edge part of a water tank to the exterior from the discharge port provided in the bottom part of this water tank.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically based on the embodiments of the present invention shown in the drawings. 1 and the following figures show an example of a seismic water storage tank embodying the present invention. This water storage tank 1 is joined to one end of a plurality of straight pipes 2,. And a cap 4 joined to the other end.
[0010]
In the cap 3, an inflow tank 5 and a water conduit 6 for fire fighting are mounted. A three-flange T-shaped tube 7 is attached to the outer end of the inflow tube 5, and a flow path is formed through the T-shaped tube to connect an external conduit and the inside of the water storage tank. A flange lid 8 with a seat flange is attached to the upper end portion of the three-flange T-tube 7, and a repair valve 10 and an air valve 11 are attached thereon. Further, a plurality of (six in the illustrated example) inflow ports 15,... Opening outward are provided at a portion in the water storage tank of the inflow pipe 5 at intervals. On the other hand, a flange lid 8 with a seat flange is attached to the outer end portion of the water conduit 6 for fire fighting, both short flange pipes 17 are attached thereon, and a repair valve 10 and a water sampling port 18 are attached thereon. ing.
[0011]
In the stopper 4, an outflow pipe 5 ′ similar to the above inflow pipe is provided, and a water supply pipe 20 for supplying water from the water storage tank to the water supply facility is mounted. Like the inflow pipe 5, the outflow pipe 5 ′ is provided with a plurality of outflow openings 15 ′ that open toward the outside of the water storage tank at intervals. Further, both flange end pipes 17, the repair valve 10, and the water supply port 21 are provided in the outer portion of the water supply pipe 20. The inflow pipe 5 and the outflow pipe 5 ′ at both ends (the cap 3 side and the plug 4 side) of the water storage tank 1 have the same structure, so that either may be the inflow side or the outflow side. Because. In other words, this type of water tank is installed in the middle of the water supply pipe, but in the villages, the water supply pipe forms a pipe network, so it is used due to daily fluctuations (morning, night) and seasonal fluctuations. This is because the amount of water to be changed may change the direction of water flow. If it does in this way, even if new water flows in from which side, it will be able to circulate in the water tank. In the following description, a normal state in which water flows into the tank from the inflow pipe 5 and flows out from the outflow pipe 5 ′ will be described.
[0012]
A plurality of flow state control plates 30 are provided inside the water tank 1. As shown in FIGS. 2 to 4, the flow state control plate 30 includes a pair of front and rear fixing plates 32, 32 that are supported by being fitted to an arcuate frame 31 provided on the inner surface of the water storage tank 1. One movable opening / closing plate 33 is provided in a space between the pair of fixed plates so as to be slidable up and down. The fixed plate 32 is formed in a generally oval shape in which both left and right sides are arc-shaped and upper and lower edges are cut out in a straight line. Further, the movable opening / closing plate 33 has straight left and right side edges, and upper and lower edges are formed in an arc shape having the same radius of curvature as the inner surface of the water storage tank. In the illustrated example, the movable opening / closing plate 33 is supported by a pair of front and rear fixed plates 32, 32. However, the movable opening / closing plate 33 can be supported by only one fixed plate.
[0013]
Guide protrusions 34, 34 are provided on both the front and back surfaces of the movable opening / closing plate 33, and these guide protrusions 34, 34 are slidably fitted in longitudinal slits 35, 35 provided on the front and rear fixed plates. is doing. Therefore, as shown in FIG. 3, the movable opening / closing plate 33 can move up and down within the range of the slit 35. When the movable opening / closing plate 33 moves down, as shown in FIG. An opening 30 a capable of passing water is formed in the upper part of the fixed plate 32 in the tank 1, and the lower part is closed by the movable opening / closing plate 33. On the contrary, when the movable opening / closing plate 33 moves upward, as shown in FIG. 5B, the opening 30b is formed on the lower side of the fixed plate, and the upper side is closed.
[0014]
Further, one of the pair of fixed plates 32, 32 is provided with a driving device 40 for moving the movable opening / closing plate 33 up and down. That is, as shown in FIG. 4, an electric actuator (solenoid or the like) 41 is provided on the side of the slit 35 of the fixed plate 32, and a U-shaped drive rod 43 is attached to the electric actuator. One end of the drive rod 43 is connected to the protrusion 34 of the movable opening / closing plate 33. When the electric actuator 41 is operated by energizing the power cord 44, the drive rod 43 moves up and down, so that the movable opening / closing plate 33 attached to the surface of the pair of fixed plates 32, 32 according to the moving direction. It moves up and down along, and forms the opening part 30a or 30b for water flow in either up and down.
[0015]
On the other hand, an outlet 50 for discharging impurities is provided at the outflow side end of the water tank main body. The foreign matter discharge port 50 is provided at the lowermost part of the stopper 4 of the water tank, and a discharge pipe 51 is connected to the discharge port 50. The discharge pipe 51 is provided with a valve 52 for opening and closing the pipe. The valve 52 is normally closed, but is opened when discharging foreign substances. The flow state control plate 30, the drive device 40, the foreign matter discharge port 50 and the like constitute a foreign matter discharge device.
[0016]
Next, the operation of the water storage tank 1 shown in FIG. As described above, the water tank 1 is provided in the middle of the underground water pipe. The water that has flowed into the water storage tank 1 from the inflow pipe 5 descends through the inflow pipe and flows into the tank from a plurality of inlets 15 that are arranged in a line. Since each of the inflow ports 15 opens outward, that is, toward the end of the water storage tank, the water flowing out of the opening once hits the inner surface of the cap 3 and reverses to flow to the right side in FIG. Since the inflow port 15 is disposed at an appropriate interval from near the ceiling to the bottom of the water tank 1, the water near the inflow end of the water tank is sufficiently agitated by this new water flow.
[0017]
The water flow flows from the inflow side end portion toward the outflow side end portion, and this water flow hits the flow state control plate 30 provided in the water storage tank to generate turbulence, and the flow state control plate. It flows into the back side of the flow control plate through the opening 30 a or 30 b provided in 30. This water flow further flows to the right side of the drawing through the opening 30b or 30a of the next flow control plate 30. Since the openings of the plurality of flow control plates 30 arranged in series in the water storage tank 1 are alternately formed up and down as shown in FIG. 6, the water flowing in from the inflow pipe 5 It flows while meandering up and down by the flow control plate 30. For this reason, turbulent flow occurs and no stagnation occurs in the tank. The flowing water that has reached the end of the outflow side, that is, the position of the plug 4, flows into the outflow pipe 5 'from the plurality of outflow ports 15', ... of the outflow pipe 5 ', and passes through the outflow pipe 5' to the downstream side. Sent to the pipeline.
[0018]
In the water tank 1, foreign substances such as sand and pebbles may flow together with water. The contaminants that have flowed into these water tanks flow slowly in the tank, so that they settle and gradually accumulate at the bottom of the water tank. If impurities accumulate, as described above, the water quality decreases and the capacity of the water storage tank decreases, so it is necessary to remove them at an appropriate cycle. In this case, in the water tank 1 of the present invention, by operating the driving device 40, as shown in FIG. 7, the openings of all the flow control plates 30 are set to the lower side, that is, the bottom position of the water tank, What is necessary is just to make water flow linearly through the bottom part of a water tank. If it does in this way, the foreign substance deposited on the bottom part of a water tank will be washed away by a strong water flow, and will be forcibly carried to the exit side of a water tank. At this time, if the valve 52 of the foreign matter discharge port 50 is opened, the foreign matter carried to the outlet side is discharged from the discharge port 50 to the outside. Since this operation can be performed by an operation from the outside of the water tank, it is safe and economical because impurities are discharged using the internal water flow.
[0019]
The structure and shape of the flow control plate that forms the opening is not limited to the example shown in the figure, but may be a part that forms a partial flow channel in the water storage tank and the other portions can block the flow. Good. Moreover, in the said embodiment, although the electric actuator was utilized as the drive device 40, other structures, such as rotating a gear with a submersible motor and operating a movable opening-and-closing plate using the rotational force, for example, are used. It may be a thing. Furthermore, in the above example, the openings of all the flow state control plates 30 can be set either up or down, but the flow state control plate 30 whose openings are located on the lower side in FIG. It is assumed that the opening 30b is always fixed on the lower side, and only the opening 30a on the upper side in FIG. 6 can be set on either the upper or lower side as in the illustrated example. You can also keep it. This is economical because the number of driving devices can be reduced. Further, the present invention is not limited to the straight pipe as shown in the illustrated example, and any shape such as a bent water tank can be adopted.
[0020]
【The invention's effect】
As is clear from the above description, the water storage tank with a contaminant discharge device according to the present invention can prevent stagnation in the water storage tank by a plurality of flow control plates installed in the water storage tank. In addition, by changing the position of the opening by an external operation, impurities accumulated on the bottom of the water tank can be easily discharged.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a water tank embodying the present invention.
FIG. 2 is an exploded view of a flow state control plate.
FIG. 3 is an explanatory diagram of functions of a flow state control plate.
FIG. 4 is a perspective view of a driving device.
FIG. 5 is a perspective view showing a contaminant discharge port.
FIG. 6 is a perspective view showing a normal flowing water state.
FIG. 7 is a perspective view illustrating a state when a foreign substance is discharged.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reservoir 2 Straight pipe 3 Cap 4 Plug 5 Inflow pipe 15 Inlet 30 Inlet 30 Flow control plate 32 Fixed plate 33 Movable opening / closing plate 34 Protrusion 35 Slit 40 Drive device 50 Contaminant discharge port 52 Valve

Claims (3)

In a water tank that is connected in the middle of a water distribution pipe and stores water for an emergency, a function is provided in which a water passage opening is partially formed inside the water tank, and the water flow is blocked at a portion other than the opening. A plurality of flow control plates having a plurality of flow state control plates are arranged in series at intervals along the axial direction of the water tank so that the openings are alternately positioned at the upper position and the lower position of the water tank. Is provided with a drive device that can position all the openings of these flow control plates on the lower side of the water storage tank, and at the outflow side end of the water storage tank, foreign substances that have moved A water storage tank with a contaminant discharge device, characterized in that a discharge port that can be discharged is provided. The flow state control plate includes a fixed plate fixed in the water storage tank and a movable opening / closing plate supported by the fixed plate so as to be movable up and down, and when the movable opening / closing plate is positioned at the upper part, the flow state control plate 2. The contaminant discharge device according to claim 1, wherein a water passage opening is formed at a lower portion of the water flow passage, and a water flow opening is formed at an upper portion of the flow control plate when positioned at the lower portion. With water tank. The water storage tank with a contaminant discharge device according to claim 1 or 2, wherein the drive device is an electric actuator.

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