JP2016223275A - Water reservoir for disaster-time water supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of replacing water in a cylindrical water reservoir which has a large diameter and a short barrel length with fed water which is as small in amount as possible.SOLUTION: A water reservoir is characterized in that: a feed water exit/entrance pipe uses double pipes to be concentrated; an outer pipe penetrates from outside the feed water exit/entrance pipe to be connected to a feed water entrance inner pipe, is introduced from one mirror plate toward the other mirror plate; a tip thereof is made substantially spherical and many holes are bored in a surface thereof so as to let water jet in all directions therefrom to flow in a tank; and a feed water exit pipe is connected inside a trumpet-shaped plate directed to the one mirror plate in the opposite direction from a jet sphere to let water flow out from inside the trumpet.SELECTED DRAWING: Figure 1

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.

  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.

  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. 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 to tank with free water surface

  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.

  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.

DESCRIPTION OF SYMBOLS 1 Tank 2 Water supply inlet pipe 3 Spout ball 4 Spout ball hole 5 Outflow pipe 6 Double pipe outer pipe 7 Trumpet-shaped plate 8 Holed cylindrical plate 9 before water feed outlet 9 Outlet 10 Spout hemisphere 11 Spout part trumpet 12 Upper end plate 13 Lower end plate 14 Water supply inlet inner pipe 15 Circulation prevention plate 16 Foundation 17 Air valve 18 Reduction portion 19 Laminar flow portion 20 Recovery outlet portion 21 Trumpet-shaped plate helicopter 22 Water surface 23 Bottom plate 24 Side plate 25 Top plate 26 Plate A trumpet-shaped plate 2726 with a reverse trumpet-shaped plate attached to the edge of the trumpet-shaped plate 2726, equidistantly spaced holes 28, a partition plate 29 between equidistantly perforated holes in the plate 26, and the outer surface of the water supply inlet inner pipe Baffle plate 30 for brake Radial fuselage partition plate

Claims (14)

  In a cylindrical water storage tank whose both ends are opened with a mirror plate, a double pipe portion is provided outside the center of one of the mirror plates (13), with the feed water inlet inner pipe as the inner pipe and the feed water outlet pipe as the outer pipe. The feed water inlet pipe is connected to the feed water inlet inner pipe extending from the side of the double pipe to the other end plate (12) at the center of the tank, and the feed water inlet inner pipe The center of the trumpet-shaped plate arranged so as to spread toward the end plate (13) is pinched, and in front of the other end plate (12), the end of the water supply inlet inner pipe serves as an inflow port, The water supply is made to flow in, and the flow is applied to the other end plate (12) and the body plate (1), and then reversed and directed toward the one end plate (13). Let it flow out through the helicopter of the trumpet-shaped plate, and then remove the cylindrical hole plate Water tanks, characterized in that the discharge from the feed water outlet pipe from passing between the inner and outer tubes of the double tube I.   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 plurality of holes are formed in the substantially spherical surface.   The inlet of 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.   The substantially spherical and substantially hemispherical surface holes change the size, shape, and number of holes for each range of the flow direction of the water supply inlet pipe, the direction perpendicular to the flow, and the direction opposite to the flow. The water storage tank according to any one of 3 items.   A number of partition plates (30) are placed radially along the feed water inlet inner pipe to divide the flow inside the tank so that the flows do not mix. The water storage tank of any one of 1-4 description.   The water storage according to any one of claims 1 to 5, wherein baffle plates are attached to the outer surface of the inner pipe of the water supply inlet at regular intervals in a direction perpendicular to the flow direction, and a number of holes are formed in the baffle plate. tank.   1st to 6th, characterized in that a plate for blocking a circulating flow around the end, which is caused by flowing out from the end slightly upstream of the end of the inner pipe, is attached in a direction perpendicular to the flow direction. A water storage tank according to any one of the items.   In a cylindrical water storage tank whose both ends are opened with a mirror plate, a double pipe portion is provided outside the center of one of the mirror plates (13), with the feed water inlet inner pipe as the inner pipe and the feed water outlet pipe as the outer pipe. The feed water inlet pipe is connected to the feed water inlet inner pipe extending from the side of the double pipe to the other end plate (12) at the center of the tank, and the feed water inlet inner pipe It spreads toward the end plate (13), and further turns back the helicopter to pinch the center of the composite trumpet-like plate facing in the opposite direction, and before the other end plate (12), the water supply inlet inner pipe The end of the inlet is used as an inlet, and water is supplied into the tank. After the flow is applied to the other end plate (12) and body plate (1), it is reversed and directed toward the one end plate (13). , The center of the end plate (13) at the folded portion of the composite trumpet-shaped plate Holes are formed at regular intervals, and a partition plate (28) is placed between the trumpet-shaped plate and the tank between the holes along the direction of flow, and the partition plate is radially folded around the periphery. Then, it flows out from the hole and between the partition plate and the trumpet-shaped plate, and then passes between the inner tube and the outer tube of the double pipe through the cylindrical hole plate, and then the water supply outlet pipe ( 5) Water storage tank characterized by being discharged from.   9. The water storage tank according to claim 8, 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.   9. The inlet according to claim 8, wherein the inlet at the end of the inner pipe of the water supply inlet is formed into 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.   The substantially spherical and substantially hemispherical surface holes change the size, shape and number of holes for each range of the flow direction of the water supply inlet pipe, the direction perpendicular to the flow and the direction opposite to the flow. The water storage tank according to any one of 10 items.   A number of partition plates (30) are placed radially along the feed water inlet inner pipe to divide the flow inside the tank so that the flows do not mix. The water storage tank according to any one of 8 to 11.   The water storage according to any one of claims 8 to 12, wherein a baffle plate is attached to the outer surface of the inner pipe of the water supply inlet at regular intervals in a direction perpendicular to the flow direction, and a number of holes are formed in the baffle plate. tank.   The eighth to thirteenth aspects are characterized in that a plate for blocking a circulating flow around the end, which is generated by flowing out from the end a little upstream of the end of the inner pipe, is attached in a direction perpendicular to the flow direction. A water storage tank according to any one of the items.

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