JPH0913433A - Water storage tank - Google Patents

Abstract

PURPOSE: To obtain a floating roof with good stability at a low cost by providing a peripheral edge float and a central float in a water tank, and stretching a roof made by a waterproof sheet between the floats to be deformed like a funnel in the case of a low level and like a roof in the case of a high water level. CONSTITUTION: A peripheral edge float 6 having a support rod 10 and a central float 7 having a cylinder are disposed in a water storage tank 1 for irrigation, and a waterproof sheet 5 is stretched between a frame 4 provided on the support rod 10 and the central float 7 to form a deformable floating roof 3. If the water level in the water storage tank is lowered or if load is applied to the roof 3 due to snow coverage or the like, the central float 7 is lowered so that the roof 3 is deformed like funnel, and in the case of a high water level, the frame 4 is brought into contact with a stopper 12 to raise the central float 7, so that the roof 3 is deformed into a projected roof. If the water storage tank 1 is large-sized, plural central floats are provided, and a waterproof sheet 5 is stretched in such a manner as to cover the whole surface of the water storage tank l. Thus, the floating roof 3 can be obtained at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water storage tank for storing irrigation water and the like.

[0002]

In the water tank, there are a number of troubles that fall into the leaves and algae are generated due to sunlight, polluting the water and clogging the nozzles of the irrigation equipment.

In order to prevent these, a water tank is generally covered with a roof. However, the structure becomes complicated and the construction cost becomes high.

As a measure for preventing the above troubles at low cost, there is a means for floating the sheet on the water surface to prevent dust and light, but it is difficult to remove dust on the sheet, and the sheet is easier than a piece due to wind or the like. There are drawbacks such as. In addition, the water storage tank has various devices such as an inflow tank, an outflow tank, a valve, and a spillway, and the sheet is involved in the constantly changing water level, and there is a concern that a trouble may occur, and measures for that need to be taken. There are many points.

The present invention has been made in view of the above problems. The purpose is that there is no load such as snow on the roof,
The aim is to propose a water tank that is stable to the wind, hard to cause obstacles, and can be constructed at low cost.

[0006]

A water storage tank according to claim 1 is a water storage tank in which a roof is attached to an upper surface of a water tank main body having a vertical wall surface, and the roof has a frame body adapted to the inner wall dimensions of the water tank main body. A waterproof sheet is fixed at the peripheral edge and stretched over, and a float is attached to the waterproof sheet at the peripheral part and the central part of the frame body, floated on the surface of the water to follow the water level of the water tank so that it can move up and down,
In addition, a cylinder with a strainer that opens into the water tank is projected upward in the central portion, and the float of the peripheral edge is attached downward through a long support rod, and at a low water level, the height corresponding to the length of the support rod It has a funnel shape whose peripheral edge is higher than that of the waterproof sheet, and when full, the frame is prevented from rising at the upper end position of the aquarium body, and has a roof shape whose peripheral edge is lower than the central waterproof sheet. .

A water tank according to a second aspect of the present invention is a water tank in which a roof is attached to an upper surface of a water tank main body having a vertical wall surface, and the roof is surrounded by a side plate adapted to a size of an inner wall of the water tank main body. A waterproof sheet is fixed at the peripheral edge and stretched over, a float is attached to the frame body, it floats on the water surface so that it can move up and down according to the water level of the tank, and one end part hangs down at the center of the waterproof sheet, and the water tank A vent pipe which is opened inside, and the other end of which projects upwardly with a strainer-equipped tube rising upward in the sheet, opens near the lower surface of the waterproof sheet, and has the other end connected to the outside of the waterproof sheet. A means for discharging air remaining between the lower surface of the waterproof sheet and the water surface to the outside of the sheet, floating the waterproof sheet in contact with the water surface, and between the waterproof sheet surrounded by the side plate of the annular frame and the water surface A hand that supplies air, inflates and floats the waterproof sheet And characterized in that it comprises a.

[0008]

In the water tank having the above-mentioned construction, when the water tank is not full and the water level is low, the roof has a funnel shape having a low central portion and a high peripheral portion, so that rainwater accumulates in the central portion. Since this rainwater is introduced into the water tank via the tube with the strainer, it does not accumulate on the roof too much. When the roof is full, the roof has a roof shape that is higher at the center than at the periphery, so that rainwater or dust on the roof is removed from the periphery to outside the tank wall.

The roof sinks below the water surface when a large load exceeding the buoyancy of the float is applied due to snow or the like, and the roof itself does not need to support a large load. When the roof sinks below the surface of the water, the water in the aquarium overflows onto the roof from the tube with the central strainer, so that snow and the like float on the water, and the load hardly acts on the roof. Therefore, the roof of this water tank has good stability, does not easily cause obstacles, and does not need to support a large load, so that the intended purpose can be achieved with a simple and low-cost one.

The roof of the water tank described in item 2 discharges the air accumulated between the waterproof sheet and the water surface from the ventilation pipe, and the waterproof sheet is in contact with the water surface and floats on the water surface by the buoyancy of the float. Since it covers, the roof top surface is flat and has little resistance to wind and is not easily damaged.

The rainwater falling on the roof flows into the tank from a cylindrical strainer projecting from the center. When a load such as snow is applied, the entire roof sinks and the water in the water tank overflows from the strainer onto the roof, and the roof is not burdened.

When removing dust and the like on the roof, air is sent from the ventilation pipe to the space between the waterproof sheet surrounded by the side plates of the annular frame and the water surface when the water level is reached, and the roof rises from the water surface. Then, the ascending stopper is brought into contact with the stopper to stop the upward movement, and then the air is supplied to the waterproof sheet so that the waterproof sheet is inflated. If the top surface of the roof is cleaned in this state, the leaves, dust, and the like are washed out of the water tank and do not stain the inside of the water tank. In addition, when the roof is fixed to the upper end of the water tank body in a state where it is in contact with the stopper and the water in the water tank is drained, the roof is supported by the water tank body and does not fall down, and cleaning of the water tank and maintenance of the equipment are performed. be able to.

[0013]

1 and 2 show a first embodiment of the present invention, wherein a water storage tank 1 is a cylindrical water tank main body 2 having a vertical wall surface.
And a floating roof 3 attached to the upper surface thereof. The floating roof 3 is formed by fixing a waterproof sheet 5 to an annular frame 4 having a diameter slightly smaller than the inner diameter of the water tank main body 2 with a margin, and fixing the waterproof sheet 5 at the peripheral edge of the frame. A plurality of peripheral floats 6 are attached at four peripheral positions, and one central float 7 is attached to the waterproof sheet 5 in the central part. The central float 7 is floated on the water surface so as to be able to ascend and descend according to the water level of the water tank. A cylinder 9 having a strainer 8 opening into the water tank projects upward.

The peripheral float 6 is attached to the frame 4 via a long downwardly extending support rod 10, the central float 7 is circular in cross section and slightly large, and the peripheral and central floats 6 and 7 are respectively located between each other. The seat can be moved up and down independently within the margin of the seat. Therefore, in the case of low water level, as shown in FIG.
The floating roof 3 has a height corresponding to the length of the support rod 10 at the peripheral edge, and has a funnel shape higher than the waterproof sheet 5 at the center.

When the water is full, as shown in FIG. 2, a ridge 11 projecting from the periphery of the frame 4 of the raised roof 3 comes into contact with a stopper 12 projecting from the inner surface of the upper end of the water tank main body 2 to form the frame. 4 is prevented from rising at the upper end position of the water tank body 2. The waterproof sheet 5 in the central portion of the floating roof is not constrained by the peripheral portion, but rises within the margin length of the seat 5 due to the buoyancy of the central float 7, and the central portion has a cone shape higher than the peripheral portion. It becomes a roof shape.

FIGS. 3 and 4 show modifications of the above-mentioned cylindrical water storage tank. This water storage tank 1 is different from the water storage tanks of FIGS. 1 and 2 in that a center pole 13 which rises from the water tank bottom passing through the central axis of the water tank body 2 and penetrating the cylinder 9 is provided.

The floating roof 3 of the water storage tank 1 has a cylinder 9 at the center.
Is raised and lowered along the center pole 13 penetrating through, and becomes a funnel shape when the water level is low as shown in FIG. 3 or a conical roof shape when the water level is full as shown in FIG. In addition, the stability of the roof against the wind can be further increased.

FIG. 5 shows an embodiment of the water storage tank according to the first aspect of the present invention, which has a rectangular parallelepiped shape. As shown in FIG. None, the inner frame 4-1 constituting the frame has a concave central portion. Peripheral floats 6 are attached to the lower end of a support rod 10 also serving as a frame at a plurality of positions inside the peripheral edge of the frame 4.

The sheet 5 is fixed to the frame 4 only at the peripheral portion,
The central portion is stretched with a margin, and a central float 7 is attached via a plurality of connecting rods 14 at positions below the frame 4-1 at three central portions. A cylinder 9 having a strainer 8 opening into the water tank projects upward from the frame 4-1 above the central float 7.

When the water tank 1 of the rectangular parallelepiped shape to which the floating roof 3 is attached is at a low water level, as shown in FIG. 5, the seat 5 at the central portion of the height corresponding to the difference between the length of the support rod 10 and the connecting rod 14 is provided. Is lower than the periphery and becomes funnel-shaped.

When the floating roof 3 is full, the frame body hits a stopper (not shown) at the upper end position of the water tank main body and is prevented from rising, so that as shown in FIG. Then, it rises under the buoyancy of the central float 7, and has a roof shape whose central portion is higher than its peripheral portion. 8, 9, 10, 11, and 12 show an embodiment of the water storage tank according to the second aspect. The water storage tank 1 is composed of a rectangular parallelepiped water tank main body 2 and a floating roof 3 provided thereon. The floating roof 3 is the tank body 2
A waterproof sheet 5 is fixed and stretched over a rectangular annular frame 15 surrounded by a side plate slightly smaller than the inner diameter of the sheet 5. A support plate 16 is attached to the center of the sheet 5, and A cylinder 9 having a strainer 8 is protruded from the plate, and a lower end of the cylinder formed of a flexible tube is attached with a weight 17 at a tip thereof and is suspended below the support plate 16 so as to be opened in a water tank.

At the four corners of the annular frame 15 of the floating roof 3, relatively small floats 18 enough to float the floating roof are mounted. A vent pipe 19 having one end opened and the other end opened on the upper surface of the sheet 15 is provided. This ventilation pipe 1
Numeral 9 discharges air remaining between the waterproof sheet 5 and the water surface to the outside of the tank, contacts the waterproof sheet 5 to the water surface, and allows the floating roof 3 to float on the water surface. FIG. 9 shows a floating roof that floats on the water surface, and some rainwater collects in the central portion of the upper surface of the seat 5 and is slightly recessed to maintain balance. This state is preferable because the stability against wind pressure is high.

The rainwater falling on the floating roof 3 flows from the strainer 8 of the cylinder 9 into the water tank, and the floating roof moves up and down following the water level. When the water level is reached, the inflow pipe for supplying water to the water tank is closed, and the inflow of water is stopped. When rainwater flows in this state, it flows out of the spillway and does not reach a water level higher than the full water level. As shown in FIG. 10, the full water level is a water level with a sufficient depth, and a floating margin is provided when air is sent under the waterproof sheet when the water level is full.

When a blower 20 is connected to the ventilation pipe 19 to supply air to the lower side of the waterproof sheet 5, the floating roof 3 rises from the water surface to near the height of the side plate of the annular frame 15, as shown in FIG. When air is further blown in while the stopper 12 is in contact with the stopper 12 and the ascent is stopped, the waterproof sheet 5 expands and becomes a dome shape.

As shown in FIG. 11, if the floating roof 3 has a dome shape and hits the stopper 12 and the upper surface of the floating roof is washed in a stopped state, dust flows out of the water tank and does not pollute the inside of the water tank.

Further, when the annular frame 15 is fixed with, for example, a pin 21 in the state of FIG.
As shown in 2, the dome-shaped swelling waterproof sheet is slightly recessed, but a part of the sheet 15 can be opened to enter the tank and be cleaned.

As shown in FIGS. 13 (a) and 13 (b), if a side plate on one side of the annular frame 5 is bent inward to provide a manhole 22, it is easy for people to get in and out, and the inside of the water tank can be changed as needed. Observation is preferable. Further, the spillway pipe 23 is provided therein, and its function can be exhibited without affecting the air pressure in the water tank.

[0028]

The present invention is as described above. The water tanks according to claims 1 and 2 are excellent in stability of the roof and are hard to cause obstacles. Is fine. Rainwater that falls on the roof is introduced into the water tank to remove dust such as fallen leaves or to prevent the formation of algae due to the insertion of sunlight, thereby preventing water pollution in the water tank.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cylindrical water tank at a low water level.

FIG. 2 is a cross-sectional view when a cylindrical water storage tank is full.

FIG. 3 is a cross-sectional view at the time of a low water level of a cylindrical water storage tank provided with a shaft pole;

FIG. 4 is a cross-sectional view when a cylindrical water storage tank provided with a shaft pole is full.

FIG. 5 is a cross-sectional view of a rectangular parallelepiped water tank at a low water level.

FIG. 6 is a perspective view of a floating roof of a cuboid water tank.

FIG. 7 is a cross-sectional view of a rectangular parallelepiped water tank when it is full.

FIG. 8 is a sectional view of a water storage tank according to claim 2;

FIG. 9 is a plan view showing a partial cross section of the water storage tank of claim 2;

FIG. 10 is a cross-sectional view of the water tank of claim 2 when it is full.

FIG. 11 is a cross-sectional view of the water storage tank according to the second embodiment in a state where the water storage tank is swelled in a dome shape and the floating roof is floated.

FIG. 12 is a sectional view showing a state in which water in the tank of the water tank of claim 2 is discharged and cleaned.

FIGS. 13A and 13B are a plan view and a cross-sectional view of a manhole provided on one side of a water storage tank.

[Explanation of symbols]

1 ... water tank, 2 ... water tank body, 3 ... floating roof, 4 ...
Frames, 4-1 and 4-2 ... Frames constituting the frame, 5
... waterproof sheet, 6 ... peripheral float, 7 ... central float, 8 ... strainer, 9 ... cylinder, 10 ... support rod, 11 ... frame ridge, 12 ... stopper, 13 ...
Shaft core pole, 14 ... connecting rod, 15 ... annular formwork, 16
...... Support plate, 17 ... Weight, 18 ... Float, 19 ...
… Ventilation pipe, 20 …… Blower, 21 …… Pin, 22 …… Manhole, 23 …… Spillway pipe.

Claims (2)

[Claims] 1. A water storage tank comprising a water tank main body having a vertical wall surface and a roof attached to an upper surface of the water tank main body. Attach the float to the waterproof sheet at the peripheral edge and the central part of the frame body, float it on the water surface and follow the water level of the water tank so that it can be raised and lowered, and at the center part, open the cylinder with the strainer that opens into the water tank upward. The float of the peripheral part is attached via a long support rod below, and at low water level, the peripheral part becomes a funnel shape higher than the waterproof sheet at the center of the height corresponding to the length of the support rod, and when the water is full, A water reservoir characterized in that the frame body is prevented from rising at the upper end position of the water tank main body, and has a roof shape with a lower peripheral portion than the central waterproof sheet. 2. A water storage tank comprising a water tank main body having a vertical wall surface and a roof attached to an upper surface of the water tank main body, wherein the roof is provided with a waterproof sheet on an annular frame surrounded by side plates conforming to the inner wall dimensions of the water tank main body. Attach the float to the frame, attach the float to the water surface, float the waterproof sheet on the water surface, lift it up and down according to the water level of the tank, one end of the waterproof sheet at the center downward It is open in the hanging water tank, the other end is provided with a strainer-equipped tube projecting upward in the sheet direction, opened near the lower surface of the waterproof sheet, and the other end is connected to the outside of the waterproof sheet. Means for discharging air remaining between the lower surface of the waterproof sheet and the water surface, and means for supplying air between the waterproof sheet surrounded by the side plates of the annular frame and the water surface. A water tank characterized by the following.