JP2017096081A - Water storage tank for disaster time water service - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an invention on a structure capable of replacing water inside of a water storage tank having a free water surface of a large barrel and the short barrel length by a water supply quantity as small as possible.SOLUTION: A water storage tank is provided so that water supply inlet-outlet pipes are concentrated as a double tube, and the water supply inlet pipe is connected to a water supply inlet inner pipe by penetrating through an outer pipe from an external part of the water supply outlet pipe, and is introduced toward the other plate direction from one plate, and its tip is formed in a substantially spherical shape of having a straightening plate on the inside, and a large number of holes are opened on its surface, and water is flowed in a tank by injecting in the all-directions from there. The water supply outlet pipe is connected to the inside of a trumpet-shaped plate turned in the one plate direction in the inverse direction of an injection ball, and is flowed out via a multiple straightening plate from the inside of a wrapper.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a drinking water storage tank installed in the middle of a water pipe in order to secure drinking water in the event of a disaster.

  Conventional water tanks for disaster water supply are horizontal and elongated, with inlet and outlet pipes on both sides, perforated pipes, many partition plates installed in the middle of the tank, and water flow partition A method of promoting the replacement of water by partitioning with a plate and passing through a multi-stage path has been proposed.

  JP 2009-264098 A   JP 57-133881 A   JP 2000-64370 A   Japanese Utility Model Publication No. 60-20687   Japanese Utility Model Publication No. 3-29421   Japanese Patent No. 3059978   Japanese Patent No. 3190823   JP 11-350544 A   Japanese Utility Model Publication No. 63-64693   Japanese Patent No. 3532326   Japanese Patent No. 5427146

  Since the water tank of the conventional invention is horizontally long, there is little mixing inside, and it was a shape that works favorably for replacement, but the water tank of the present invention is a ground type vertical type to maintain stability However, the tank cannot be lengthened, and the body must be thick and the length shortened. Therefore, flow separation occurs in the fast central portion and the slow inner wall portion inside, and satisfactory water replacement cannot be achieved by the conventional method. In addition, in underground water storage tanks, a valve that shuts off water supply in the event of an earthquake must be installed, and measures must be taken to prevent internal water from flowing out when the external piping connected to the tank is damaged. For this reason, the introduction cost was high and maintenance was also necessary.

  An object of the present invention is to achieve the replacement of water in a short time even in a tank having a large diameter and a short body.

  In order to achieve the above object, the present invention has a cylindrical water storage tank with both ends closed by a mirror plate, and a double pipe is formed in the central portion of the mirror plate so that the inlet and outlet of the water supply are centralized. The pipe is the feed water inlet inner pipe, and the gap between the outer pipe and the inner pipe is the outflow pipe. The inner pipe of the water supply inlet extends from one end plate with a double pipe part to the other end plate, and forms a large number of substantially spherical perforated outlets in front of the other end plate. It is made to eject at the same time.

  By jetting from this hole, the speed is simultaneously reduced in all directions, and further, the speed is applied to the end plate or the body plate to reduce the flow inside the tank quickly so as to prevent mixing between fluids. In particular, when the flow rate is small, one substantially hemispherical rectifying plate is provided inside the substantially spherical ejection ball, and when the flow rate is further small, two are provided so as to be ejected evenly.

  However, when the flow inside the tank becomes laminar, the flow is fast in the center of the tank, slows down near the inner wall of the tank shell plate, and the old water cannot be pushed out evenly with new water, so the water supply that passes through the center A circular baffle plate is attached to the inner pipe of the inlet at regular intervals, and the flow in the center is braked so that the flow becomes uniform.

The water supply outlet pipe flows out from the inside of the trumpet-shaped plate facing the end plate connected to the outlet pipe. The flow path between the trumpet-shaped plate helicopter and the end plate is tightened to increase the flow velocity and let it flow out. Also, especially when only a small flow rate flows, the trumpet-shaped helicopter is folded back to form the reverse trumpet shape, and the outflow channel shape is venturi-shaped, with equally spaced holes directed toward the center. Make a space between the holes with a plate. This is because if the diameter of the reverse trumpet plate is increased to approach the peripheral wall in order to speed up the slowed flow at the tank peripheral wall, the flow at the center deteriorates. Becomes faster and changes depending on the flow rate. In order to balance the flow at this time, the flow is collected in a trough of a trumpet plate in the opposite direction to the trumpet shape, and a hole is made there to control it. At this time, due to the Venturi effect, the flow with the higher flow velocity attracts the flow with the slower flow rate and balances it.
Cylindrical perforated plates are placed around the water supply outlet double pipe port to help rectify the flow in the tank, but if the flow rate is low, it can be doubled. Keep the effect as triple.

  As a method of decelerating the water supply, a method of hitting the trumpet pipe toward the inner surface of the mirror plate or a method of jetting in parallel with the mirror plate through a cylindrical perforated plate with closed ends has been proposed. In the invention, the spherical water supply inlet having the same curvature as that of the mirror is ejected simultaneously in all directions, but naturally the amount of ejection in the flow direction increases and the amount of ejection in the direction opposite to the flow direction decreases.

  The flow jetted in the flow direction strikes the end plate simultaneously and further decelerates and reverses. The flow caused by jetting in the direction opposite to the flow direction has the effect of preventing the circulating flow around it by jetting in the flow direction, and has the effect of blocking internal mixing, and a baffle plate is added behind the jetting sphere. By doing so, the circulation flow can be blocked and the effect of preventing mixing can be enhanced. The turbulent flow ejected from the inlet pipe by these actions is quickly changed to a laminar flow and can flow toward the outlet without being mixed or separated inside. In addition, the flow can be optimized by changing the ejection amount by changing the difference in the ejection amount in the opposite direction to the flow direction in the hole diameter and the number in the direction perpendicular to the inflow direction and the inflow direction and in the direction opposite to the inflow direction. .

On the other hand, the shape of the outlet needs to be a method that allows the laminar flow to flow as evenly as possible without disturbing the laminar flow. As a method, a trumpet-shaped plate directed toward the end plate is provided just before the outflow pipe port, and a cylindrical perforated plate is formed around the outlet in the trumpet-shaped plate.
This cylindrical perforated plate becomes less effective when the flow rate is reduced, so that the effect can be recovered by making it double. Furthermore, it is necessary to make it triple in order to use it with a small flow rate.
The flow of water between the outer pipe and the inner pipe of the double pipe is increased by flowing out the water before the outflow pipe through the gap between the helicopter of the trumpet-like plate and the end plate, and then passing through the perforated plate. This has the effect of correcting the unevenness and making the trumpet-like helicopter flow evenly.

  Also, especially in the case of a small flow rate, the helicopter of the trumpet-like plate is folded back so that the flow path shape becomes a venturi shape, and holes at equal intervals are made in the valley portion of the folded-back portion, and By inserting a partition between the holes, there is an effect of automatically correcting the uneven flow due to the size of the reverse trumpet and the uneven flow due to the flow rate. This is because the flow path shape is a venturi shape, and the faster flow of the jet side from the hole and the flow path side of the trumpet plate sucks the slower flow. As described above, the exchange of water is promoted by the combination of the shape on the inlet side and the shape on the outlet side. The present invention can also be applied to a horizontal tank or a tank having a free water surface.

  In connection with the handling of external piping, the inlet and outlet pipes of this tank are concentrated at one location on the top of the tank, and it is easy to place them, and even if the external piping connected to this tank is damaged by an earthquake, Is installed at the top of the tank, and the water inside the tank is automatically secured by installing an air valve, and there is no need for a shut-off valve, which is necessary for piping connected to the lower part of a conventional tank. Can be reduced.

  The difference between the temperature of the water in the tank and the temperature of the feed water works to separate the internal flow, as is a problem in the prior art literature. Is perpendicular to the temperature and is not affected by the difference in specific gravity due to temperature. Above ground tanks are heated by the sun, so the temperature in the tank is always higher than the water supply temperature, and the temperature difference is severe. This tank is a vertical type and has a structure that can promote the replacement of water in the tank by effectively utilizing the difference in specific gravity since water supply having a low temperature and a high specific gravity is introduced from the bottom.

  Sectional drawing (inlet spherical type) of the water storage tank which shows embodiment of this invention   Sectional drawing (entrance hemispherical type) of the water storage tank which shows embodiment of this invention   Enlarged view of the spherical part at the end of the pipe inside the water supply inlet   Enlarged view of inflow / outflow double pipe, trumpet plate and perforated plate   Enlarged view of a trumpet-shaped plate with a trumpet-shaped plate in the opposite direction attached to the edge of the plate   Application example 1 to tank with free water surface   Outline drawing of ejected ball   Detailed view of the outer rectifying plate inside the sphere   Detailed view of the inner rectifier plate inside the outer rectifier plate outside the ejection sphere   Enlarged view of inflow / outflow double pipe, trumpet plate and triple perforated plate   Application example 2 to tank with free water surface A trumpet-shaped plate with a square-shaped trumpet plate opposite to the helicopter

  In FIG. 1, a feed water inlet pipe 2 is connected to a feed water inlet inner pipe 14 which is an inner pipe of an upper double pipe 6 of a cylindrical vertical tank 1, and the inlet inner pipe 14 is directed from the top to the bottom of the tank. Is extended, and a substantially spherical ejection sphere 3 is attached to its end, and a large number of holes 4 are formed in its spherical surface. These holes can be changed in size and number to change the amount of ejection depending on the direction.

  The outflow pipe 5 is also provided in the upper part of the tank 1, and the feed water inlet inner pipe 14 and the outer pipe 6 of the outflow double pipe are in the same position, and inflow and outflow are performed. The outflow pipe 5 is connected to the upper side of the outer pipe 6 of the double pipe, and a trumpet-shaped outflow plate 7 and a cylindrical perforated plate 8 are arranged inside the inner tank of the double pipe outer pipe 6. The end of the trumpet-shaped outflow plate 7 is brought close to the upper end plate 13 of the tank, and once clogged and squeezed to open the outflow port 9. When the internal flow becomes a smaller flow rate, as shown in FIG. 5, the edge of the trumpet-shaped outflow plate 7 is folded back to form a trumpet-shaped plate 26 to which a trumpet-shaped plate facing in the opposite direction is attached. Holes 27 are formed in the part at regular intervals, and a partition plate is inserted between the holes. As a result, the outflow path is shaped like a venturi.

  FIG. 3 shows an enlarged view of the ejection sphere 3, and FIG. 4 shows an enlarged view of the inflow / outflow pipe, the trumpet plate, and the perforated plate. In FIG. 2, the ejection sphere at the end of the inflow pipe in FIG. 1 is divided into a hemisphere 10 and a trumpet pipe 11, which simplifies production and allows cost reduction. Also, in the production of the ejected ball, there is no problem even if it uses a product that is assembled by dividing the perforated plate into a number of parts that are expanded, cut, bent, and reduced in cost. Connected.

Further, as a method for preventing further internal mixing, a partition plate 30 is inserted radially from the water supply inlet inner pipe at the center of the tank in the flow direction to prevent mixing in the direction perpendicular to the flow direction. Other shapes are the same as in FIG.
Even if the flow squirted from the ejection sphere 1 is a small amount, the double rectification of the inner rectifying plate 3 and the outer rectifying plate 2 having a large number of holes in the sphere is made evenly possible from the entire surface of the sphere. Install. A hole larger than the surrounding hole is formed at the top of the substantially hemispherical plate of the inner rectifying plate 3 and the outer rectifying plate 2, and the hole is larger in the hole 5 of the inner rectifying plate than the hole 4 of the outer rectifying plate. Yes. The flow that enters from the outflow pipe 6 is first dammed up by the inner rectifying plate, and the internal pressure rises. However, in the substantially hemispherical part and the cylindrical part, the cylindrical part is more likely to flow out, The amount of outflow from the radius portion is insufficient, and the amount of outflow from the cylindrical portion is too large.
Therefore, the top hole 5 is necessary in order to bring both ejection amounts closer to each other.
Next, the flow passing through the inner rectifying plate 3 is blocked by the outer rectifying plate 2 and the internal pressure rises. However, in order to adjust the outflow amount of the substantially hemispherical portion and the cylindrical portion for the same reason as the inner rectifying plate. The top hole 4 is opened, but the hole 4 needs to be smaller than the hole 5 in order to ensure the internal pressure between the current plates 2 and 3. In this manner, even a small flow rate can be ejected evenly from the ejection sphere with the rectifying plate being doubled. However, if the flow rate can be increased, the cost can be reduced by using a single current plate.

FIG. 6 shows an application example to a tank having a free water surface. In this tank, the double pipe of the feed water inlet / outlet is attached to the bottom plate of the tank, the inner pipe of the feed water inlet is run toward the water surface, has a substantially spherical outlet before the water surface, and is ejected toward the water surface due to the gravity of the water surface. Invert. The shapes of the outlet and the outlet pipe are the same as described above.
In the case of this tank, it is necessary to float the float on the surface of the water supply inlet passing through the center of the tank and attach a float valve 32 for controlling the flow rate by the movement to control the inflow and outflow of the tank to be the same.
Since this tank has a water surface and a gas phase part, it needs a vent for taking in and out of air, but hypochlorous acid, which is a water disinfectant inside the tank, evaporates in the gas phase part, If it is discharged to the outside from the vent and the water is slowly replaced in the tank, the necessary concentration of 0.1 mg / l (water supply law) cannot be maintained. Therefore, it is necessary to attach a normally closed vent that does not open to a certain positive pressure and does not open to a certain negative pressure. Accordingly, the hypochlorous acid gas is not released to the outside up to a certain pressure, and the decrease in the concentration of hypochlorous acid in water can be minimized.
Here, by suppressing the release of hypochlorous acid, the concentration of hypochlorous acid in the gas phase increased, and the hypochlorous acid gas was reabsorbed and concentrated in the water droplets attached to the ceiling and walls. The disadvantage of corroding the material arises. Therefore, the liquid phase part with high water pressure has a welded structure, but from the gas phase part with low water pressure to the water surface, it cannot be welded as a bolt assembly structure with packing in between, but it is not resistant to hypochlorous acid. It can be solved by using in combination.

DESCRIPTION OF SYMBOLS 1 Tank 2 Water supply inlet pipe 3 Spout ball 4 Spout ball hole 5 Outflow pipe 6 Outer pipe of double pipe 7 Trumpet-shaped plate 8 Perforated cylindrical plate before water supply outlet 8-1 Perforated cylindrical plate before water supply outlet Outer perforated cylindrical plate 8-2 Perforated cylindrical plate outside the perforated cylindrical plate outside the perforated cylindrical plate before the water supply outlet 9 Outlet 10 Ejection hemisphere 11 Ejection trumpet tube 12 Upper end plate 13 Lower end plate 14 Inside the water supply inlet Pipe 15 Circulation prevention plate 16 Foundation 17 Air valve 18 Reduction part 19 Laminar flow part 20 Recovery outlet part 21 Trumpet-shaped plate helicopter 22 Water surface 23 Bottom plate 24 Side plate 25 Top plate 26 Square wrapper opposite to the edge of the plate Baffle plate 30 on the outer surface of the water supply inlet inner pipe 29 Radial partition plate 29 between equidistant holes in the plate of trumpet-like plate 2726 with a plate-like plate Partition plate 31 torso split Always closed vent Strong material to float 34 manhole 35 gas phase 36 hypochlorous acid of the valve body 33 the float valve 2 float valve (Dissimilar which can not be welded to the material of the liquid phase portion)
37 Material of the liquid phase part 38 Flange on the material side resistant to hypochlorous acid 39 Gasket 40 Flange on the normal material side 41 Bolt / nut 42 Outer rectifying plate 43 inside the ejection sphere Opened on the hemispherical top of the outer rectifying plate Hole 44 Inner rectifying plate 45 inside the outer rectifying plate inside the ejection sphere Hole 46 opened in the hemispherical top of the inner rectifying plate 46 Hole in the outer rectifying plate 47 Hole in the inner rectifying plate

Claims (16)

  In a water storage tank that is closed at both ends with a plate or square and has a free water surface inside, on the outside of the center of one bottom plate (23), a water supply inlet inner pipe is an inner pipe, and a water supply outlet pipe is an outer pipe. The water supply inlet pipe is connected to the water supply inlet inner pipe extending from the side of the double pipe to the other top plate (25). The water supply inlet inner pipe has a square and a trumpet-shaped plate arranged so as to spread toward one bottom plate (23), and before the other top plate (25), The end of the inner pipe of the water supply inlet is used as an inlet, and water is introduced into the tank. After the flow is applied to the gravity of the water surface and the side plate (24), it is reversed and directed toward the one bottom plate (23). , And let out through the helicopter of the trumpet plate of one bottom plate (23), Water tanks, characterized in that the discharge from the feed water outlet pipe (5) from the through cylindrical perforated plate passes between the inner and outer tubes of the double tube after.   2. The water storage tank according to claim 1, wherein an inflow port at an end of the inner pipe of the water supply inlet has a substantially spherical shape, and a number of holes are formed in the substantially spherical surface.   The inflow port at the end of the inner pipe of the water supply inlet is formed in a substantially hemispherical shape after being expanded in a trumpet shape in the flow direction, and a plurality of holes are formed in the surface of the substantially hemispherical shape. Water storage tank.   A substantially spherical rectifying plate (44) having a slightly cylindrical extension at the end of the inner pipe of the water supply inlet is formed, and a substantially spherical rectifying plate (3) is provided outside the inlet on the center line of the inner pipe of the water supply inlet. A plurality of holes are formed in the surface of the two rectifying plates, and a hole larger than a surrounding hole is formed in the top of the inner rectifying plate (44). Water storage tank.   A substantially spherical rectifying plate (44) slightly extended in a cylindrical shape at the end of the inner pipe of the water supply inlet is formed, and a substantially spherical rectifying plate (42) extended in a slightly cylindrical shape on the outer side thereof. It is attached to the inflow side on the center line, and a substantially spherical rectifying plate (3) is attached to the outside on the inflow side on the center line of the water supply inlet inner pipe. A number of holes are made, and a hole larger than the surrounding hole is made in the inner rectifying plate (42) and the top of the inner rectifying plate, and the top hole is a hole of the inner rectifying plate (42). The water storage tank according to claim 1, wherein the water storage tank is smaller than the hole of the inner current plate.   2. The water storage tank according to claim 1, wherein a normally closed vent is attached to the gas phase portion of the water storage tank so as not to open to a constant positive pressure and not to a constant negative pressure.   The liquid phase part with high water pressure of the water storage tank has a welding structure, and it is made of a different material that cannot be welded with the liquid phase part from the gas phase part with low water pressure to the water surface, and has a bolt assembly structure with a packing interposed therebetween. The water storage tank according to claim 6.   The float is floated on the water surface at the water supply inlet pipe of the water storage tank, and a float valve for controlling the flow rate by the movement of the float is attached to control the inflow and outflow of the tank to be the same. 1. The water storage tank according to 1.   In a water storage tank that is closed at both ends with a plate or square and has a free water surface inside, on the outside of the center of one bottom plate (23), a water supply inlet inner pipe is an inner pipe, and a water supply outlet pipe is an outer pipe. The water supply inlet pipe is connected to the water supply inlet inner pipe extending from the side of the double pipe to the other top plate (25). The feed water inlet inner pipe spreads out in a conical shape toward one bottom plate (23), and further folds the helicopter to pinch the central portion of the composite trumpet-like plate that is square and facing in the opposite direction, Before the other top plate (25), the end of the inner pipe of the water supply inlet is used as an inflow port, water is supplied into the tank, the flow is applied to the gravity of the water surface and the side plate (24), and then inverted. Direct toward the bottom plate (23) and in front of the bottom plate (23) Holes are formed at regular intervals in the center of the folded portion of the composite trumpet-shaped plate, and a partition plate (28) is disposed between the trumpet-shaped plate and the tank between the holes in the direction of flow. Standing along, the partition plate is folded radially around the periphery, and flows out from the hole, between the partition plate and the trumpet plate, and then through the cylindrical perforated plate, the inner tube and the outer tube of the previous double tube The water storage tank is characterized in that it is discharged from the water supply outlet pipe (5) after passing between the two.   The water storage tank according to claim 9, wherein an inflow port at an end of the inner pipe of the water supply inlet has a substantially spherical shape, and a number of holes are formed in the surface of the substantially spherical shape.   The inflow port at the end of the inner pipe of the water supply inlet is formed in a substantially hemispherical shape after being expanded in a trumpet shape in the flow direction, and a number of holes are formed in the surface of the substantially hemispherical shape. Water storage tank.   A substantially spherical rectifying plate (44) having a slightly cylindrical extension at the end of the inner pipe of the water supply inlet is formed, and a substantially spherical rectifying plate (3) is provided outside the inlet on the center line of the inner pipe of the water supply inlet. 10. A plurality of holes are formed in the surface of the two rectifying plates, and a hole larger than a surrounding hole is formed in the top of the inner rectifying plate (44). Water storage tank.   A substantially spherical rectifying plate (44) slightly extended in a cylindrical shape at the end of the inner pipe of the water supply inlet is formed, and a substantially spherical rectifying plate (42) extended in a slightly cylindrical shape on the outer side thereof. It is attached to the inflow side on the center line, and a substantially spherical rectifying plate (3) is attached to the outside on the inflow side on the center line of the water supply inlet inner pipe, and is attached to the surface of the three rectifying plates. A number of holes are made, and a hole larger than the surrounding hole is made in the inner rectifying plate (42) and the top of the inner rectifying plate, and the top hole is a hole of the inner rectifying plate (42). The water storage tank according to claim 9, wherein the water storage tank is smaller than the hole of the inner current plate.   The water storage tank according to claim 9, wherein a normally closed type air vent that does not open to a constant positive pressure and does not open to a constant negative pressure is attached to a gas phase portion of the water storage tank.   The liquid phase part with high water pressure of the water storage tank has a welded structure, and it has a bolt assembly structure with sandwiched packing as a different material that cannot be welded with the liquid phase part from the gas phase part with low water pressure to the water surface. The water storage tank according to claim 14.   The float is floated on the water surface at the water supply inlet pipe of the water storage tank, and a float valve for controlling the flow rate by the movement of the float is attached to control the inflow and outflow of the tank to be the same. 9. The water storage tank according to 9.

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