JPS5840658B2 - Cylindrical water wheel installed at the gate - Google Patents

Description

[Detailed Description of the Invention] This invention provides a cylindrical water wheel at the gate, so that in the event of a failure of the water wheel or generator, the cylindrical water wheel can be pulled up to the water surface together with the gate, so that water can always be released. At the same time, the pressure oil device that controls the guide vane is installed inside the gate, and the actuator converter connected to the pressure oil device and the guide vane adjustment device are installed inside the inner guide vane ring, making the installation extremely compact as a whole. This is also an attempt to obtain a simple cylindrical water wheel.

Most of the power generation energy in Japan is obtained by burning oil, and most of the oil used as this energy source is imported from the Middle East and other countries.

Moreover, the import price of this oil is only increasing year by year, and in order to save money due to the need to conserve resources,
Recently, there has been a demand for the development of unused hydropower energy.

By the way, hydroelectric power generation has been developed in our country for a long time, so future development sites will likely be small-capacity sites of several thousand kilowatts or less at very low heads of, for example, 10 meters or less.

Cylindrical water turbines (tubular water turbines) are normally used for this ultra-low head power generation. Conventionally, cylindrical water turbines have a case made of concrete and the water wheel is embedded in the concrete case, which reduces the cost of civil engineering work. It is expensive and also requires a long period of time for installation and disassembly.

Additionally, such power plants are often required to discharge irrigation water downstream at all times, but there is also the problem that water cannot be discharged through the turbine if the turbine or generator breaks down.

In this invention, a cylindrical water wheel is attached to a water outlet of a dam or a gate of an irrigation canal, thereby solving the above-mentioned drawbacks and problems.

Next, one embodiment of the present invention will be explained with reference to the figures.
In the figure, reference numeral 1 denotes a gate that is movable up and down in a water outlet or an irrigation canal of a dam (not shown).

A part of this gate 1 includes an outer guide vane ring 2,
An inner guide vane ring 3 is integrally provided, and a guide vane 4, a steven 5, a water wheel 6, etc. are provided therebetween.

The water wheel 6 is coupled to a generator 8 via a water wheel shaft 7.

Inside the inner guide vane ring 3, a guide vane adjustment device 9, etc., which will be described later, is provided.

An oil collection tank 10 is housed in a portion of the gate 1 above the outer guide vane ring 2.
A pressure oil tank 12, an unloader 13, a pressure oil pump 14, etc., which together with 0 form the pressure oil device 11, are also provided in a positional relationship as shown in FIG.

15 is a pipe connecting the oil collecting tank 10, the pressure oil tank 12, and a converk 22 and a pressure distribution valve 23, which will be described later, and this pipe 15 passes through the inside of the steven 5.

Referring to FIG. 3, the guide vane adjusting device 9 and the mechanism for operating the guide vane adjusting device 9 will be explained. A guide link 18 is coupled to the shaft 16 of the guide vane 4 via a link mechanism 17. As shown in FIG.

A piston rod 21 of a guide vane servo motor 20 is connected to the guide link 18 via an L-shaped link mechanism 19.
are combined.

22 is a converter that issues an operation command to the guide vane servo motor 20 according to the rotation speed of the water turbine, and 23 is a pressure regulating valve, which are fixed to the upper part of the guide vane servo motor 20 described above.

That is, the pressure distribution valve 23 is driven by the converter 22 according to the rotational speed of the water turbine, and is configured to switch and apply hydraulic pressure to the two liquid supply ports 24 and 25 of the guide vane servo motor 20.

26 is an electric return device, and the piston rod 21
The movement is extracted via the link mechanism 27, converted into an electrical signal, and fed back to the electrical part of the governor device (not shown).

In addition, since it is not preferable to house the electrical part of the governor device inside the gate 1 or inside the inner guide vane ring 3 in terms of electrical insulation, it is provided above the water surface together with the switchboard.

In the case of mechanically powered banners, it is also possible to house the governor device within the inner guide vane ring 3.

When operating this cylindrical water wheel, the gate 1 is lowered appropriately so that the water wheel 6 is effectively rotated by the water flow.

When the water turbine 6 or the generator 8 breaks down, water can be released by pulling up the gate 1.

Pressure oil for controlling the guide vanes 4 is accumulated in a pressure oil tank 12 from a pressure oil pump 14 through an unloader 13.

This pressure oil is then applied to the pressure distribution valve 23 through the pipe 15.

The pressure distribution valve 23 is driven by the converter 22, feeds oil into either one of the two fluid supply ports 24, 25 of the guide vane servo motor 20, and discharges oil from the other.
Alternatively, both liquid supply ports 24 and 25 are closed.

The guide vane servo motor 20 is operated thereby,
The piston rod 21 is moved in the left-right direction in the figure.

This movement of the piston rod 21 is caused by the link mechanism 19
This is converted into a movement in the vertical direction in the figure, and the shaft 16 is rotated via the guide link 18 and link mechanism 17.

Therefore, the guide vane 4 rotates and its opening degree changes.

In this way, the guide vane 4 is controlled from inside.

In this invention, as mentioned above, the cylindrical water turbine is attached to the gate 1 without being embedded in the concrete case, so the cost of civil engineering work is lower than that of conventional cylindrical water turbines, and the time required for installation and disassembly is also short. This has the advantage of being

Moreover, by lifting the gate 1, there is an effect that water can be discharged at any time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of a cylindrical water turbine based on the present invention, FIG. 2 is a side view showing the upper part of the gate in FIG. 1, and FIG.
This figure is a front view showing the guide vane adjusting device and its drive mechanism shown in FIG. 1. 1...Gate, 3...Inner guide vane ring, 4...Guide vane, 6...
・Water wheel, 9...Guide vane adjustment device, 11.
...Pressure oil equipment, 15...Piping.

Claims (1)

[Claims] 1 A cylindrical water wheel is attached to a gate used for a water outlet of a dam, an irrigation canal, etc., a pressure oil device for controlling the guide vane of the cylindrical water wheel is provided inside the gate, and a guide vane adjustment device is installed inside the inner guide vane ring. A cylindrical water turbine installed in a gate, characterized in that the guide vane is controlled from an inner guide ring side.