JP5757052B2 - Water level responsive automatic open / close valve in rainwater power generation - Google Patents

Description

  The present invention relates to an automatic valve that automatically opens and closes a waterway opening of rainwater supplied to a generator in accordance with a water level in a hydroelectric power generation system using rainwater stored on a rooftop.

There are various hydroelectric generators using rainwater collected on the building roof. For example, in Patent Document 1, the open / close valve is opened in a state where rainwater has accumulated in a water storage tank on a rooftop. For example, in patent document 2, the flow volume is adjusted by providing a water collection filtration tank in the middle of a vertical shaft. However, in each of these prior arts, after rainwater is stored in the storage tank, the open / close valve is opened or the storage tank is passed through again.
In this case, the operation of the open / close valve may be manual or electric.

JP2010-169006 JP2011-17196 Utility model registration No. 3119851

  In the above-mentioned Patent Document 1, the control system and power for opening and closing the valve at the water level set while monitoring the water level by manipulating the opening and closing operation of the valve for supplying the rainwater to the generator by storing rainwater in the storage tank. Therefore, there is a problem that a communication system is required, manpower, facilities, maintenance, electric shock and electric leakage countermeasures are required, and the power generation cost becomes very high.

The on-off valve attached to the water channel for storing rainwater on the roof and supplying it to the generator can be automatically opened and closed according to the level of the stored rainwater.
That is, the volume and weight are set so that the rainwater stored on the roof rises with buoyancy when the set water level is reached.
The valve consists of a circular or polygonal ring main valve and auxiliary valve, and is made of a material having a specific gravity smaller than that of rainwater, or by providing a cavity inside, the specific gravity of the valve body is 0.1 or more and less than 1.0. Set to.
The auxiliary valve is installed on the outer periphery of the main valve and consists of a water shielding plate and a projecting floating body that floats it, and the outer periphery of the projecting floating body is used to prevent malfunction of the valve opening and closing due to the wave of rain water surface. Has a corrugated plate. In addition, the water shielding plate prevents the water level at which the water starts to float, and if the water pressure is directly applied to the main valve, it floats below the set water level depending on the relationship between the weight and the water pressure.

  The central part of the valve is a pipe of the same diameter as the drain pipe, maintaining the original function of the drain pipe.

  The valve is robust and simple in structure and can be mass-produced at low cost.

  Rainwater power generation using drainage pipes in high-rise buildings can be put into practical use by automatically draining the rainwater on the roof without using an open / close valve, water tank, or motorized valve. It can make a great contribution to the use of energy.

Longitudinal sectional view of the valve of the present invention when the water pipe is inserted 1 is a cross-sectional view in the downward direction along the line aa in FIG.

The main valve and auxiliary valve are manufactured for each nominal diameter of the drain pipe. The floating start water level of the auxiliary valve is determined so as to satisfy the condition of “inlet area when the main valve ascends> drain pipe cross section” in consideration of the sinking amount of the main valve body.
When the drain pipe is a PVC pipe having a nominal diameter of 400, the inner diameter is 39.5 centimeters, so the diameter is D = 10 centimeters. Therefore, the cross-sectional area is Sp = πxDxD / 4 = 3.14 × 10 × 10/4 = 78.5 centimeters. In addition, from the inlet area Se = pipe inner diameter x main valve flying height, the main valve flying height is 78.5 / 39.5 = 1.98 centimeters or more. Assuming that the sinking amount of the main valve body is 0.52 centimeters, the water level is set to 2.5 centimeters.

1 Main valve 2 Auxiliary valve 2-1 Water shielding plate 2-2 Protruding float 3 Main valve guide frame 4 Auxiliary valve floating start water level 5 Wave breaker 6 Drain pipe 7 Roof floor

Claims (1)

It is an automatic open / close valve installed in a drain pipe that drains rainwater that falls on the rooftop of a building, etc., and moves up and down according to the level of rainwater stored on the rooftop, and is inserted into the drain pipe and operates only up and down the valve. It consists of a valve guide frame that can be made, and the valve consists of a circular or polygonal annular main valve and an auxiliary valve. The specific gravity is set to 0.1 or more and less than 1.0, the auxiliary valve is installed on the outer periphery of the main valve, and consists of a water shielding plate and a protruding floating body that floats it. An automatic on-off valve having a wave protection plate that prevents malfunction of the valve opening and closing due to waves of rainwater.

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