JPH1130179A - Water turbine provided with weir board and hydraulic power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water turbine provided with a weir board and a hydrau lic power plant by providing a reaction water turbine capable of obtaining the output by a compact water turbine in a location having the low head and the small water amount and capable of restraining the cost of civil engineering and construction works to the minimum extent. SOLUTION: In a device, a water intake port is provided on the upper part of a water passage, an opening is provided to a water outflow port on the tip of the water outflow part of a L-shaped draft tube 2 in which the water outflow port is provided on the lower part, a weir board 4 is fixed, and a reaction water turbine is provided on the water passage. A generator is provided through a transmission device for transmitting the rotation of the reaction water turbine, and a hydraulic power plant is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water turbine having a weir plate provided with a reaction type water turbine such as a Francis turbine, a propeller turbine, a Kaplan turbine or a mixed flow turbine which can be easily installed in a river or a water channel through which water flows. It relates to a power generator.

[0002]

2. Description of the Related Art On the earth, a large number of hydroelectric power stations are provided by a water turbine and a generator utilizing a head of water. Water turbines generate output according to head and flow rate, and water turbines used for power generation are roughly classified into reaction type and impulse type, and reaction type turbines are mainly used for medium to low heads. In general, when a reaction-type turbine is used in a hydroelectric power plant, large-scale civil engineering works such as a dam, a water channel, a penstock, and a turbine generator room are required. Therefore, the unit price per kW of the generated power is very high.

[0003]

At present, in order to utilize this hydropower, the cost of civil engineering work is similarly large even at a location with a low head and a small amount of water.
The construction unit price per unit output is expensive, and the situation is not widespread.

[0004] The only remaining hydropower points at present are low heads and only hydropower stations with a small amount of water and a small output. Therefore, development costs of such hydropower stations need to be kept low. In order to minimize development costs, it is important to minimize civil engineering construction costs, and the turbines must be compact and integrated. However, it is a fact that the output is not obtained by a water turbine at a location point having a low head and a small amount of water.

Accordingly, the present invention provides a dam plate provided with a reaction-type water turbine capable of obtaining an output with a compact water turbine and minimizing civil engineering construction costs at a location with a low head and a small amount of water. The present invention provides a water turbine and a hydroelectric power generator provided with the above.

[0006]

SUMMARY OF THE INVENTION A water turbine according to the present invention is characterized in that a water inlet is provided at an upper part of a water passage and a water outlet is provided at an end of an L-shaped draft tube having a water outlet at a lower part. An opening is provided in accordance with the outlet, the weir plate is fixed, and a reaction type water turbine is provided in the water passage.

Further, in the hydraulic power plant according to the present invention, a water inlet is provided at an upper portion of a water passage, and a water outlet is provided at a lower end of an L-shaped draft tube provided with a water outlet at a lower portion. In addition, an opening is provided, a dam plate is fixed, a reaction water turbine is provided in the water passage, and a generator is provided via a transmission device for transmitting rotation of the reaction water turbine.

In the water turbine according to the present invention, if the water is thrown into a river or a water channel where water flows, the water is automatically stopped by the weir plate and a head is formed, and the water falls from the water inlet of the water passage of the L-shaped draft tube. Water flows toward the water outlet, and the output of the turbine is determined by the head and the flow rate.

Therefore, the generated output can be easily adjusted by the height of the weir plate attached to the water wheel. If a generator is added, it becomes a hydroelectric generator.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a hydroelectric generator using a flood-type reaction water turbine provided with a weir plate of the present invention, FIG. 2 is a plan view thereof, FIG. Is a perspective view of the same.

A weir plate 4 is fixed to the tip of a water outlet 3 below the L-shaped draft tube 2 in which the water passage 1 is formed, and the weir plate 4 has an opening 5 corresponding to the water outlet 3. Have been. The weir plate 4 is made of wood, metal, concrete, synthetic resin, or the like, and is designed to have strength enough to withstand the amount of water blocked. The water outlet 3 is formed so as to widen toward the weir plate 4.

A reaction type water turbine 6 is provided in the upper part of the draft tube 2. The embodiment shown in FIG.
In the example of applying a propeller or a Kaplan turbine known in Japanese Patent Publication No. 99, a flow rate adjusting ring 8 is provided around a runner 7 so as to be movable up and down in a guide vane 9 coaxially with the runner 7. The up and down movement of the flow rate adjusting ring 8 is performed by moving the operation lever 10 of the link mechanism. By moving the flow rate adjusting ring 8, the area of the flow path formed between the guide vane 9 and the guide ring 9 is adjusted to adjust the flow rate.

The reaction type water turbine 6 is provided with a vertical shaft-integrated generator 12 via a speed increasing device as a transmission device 11 for transmitting the rotation of the reaction type water turbine 6, and the speed increasing device is attached to the shaft of the runner 7. The fixed large-diameter pulley 13 is transmitted to an intermediate small-diameter pulley 15 via a V-belt 14,
At 6, the speed is transmitted to the small-diameter pulley 17 fixed to the rotating shaft of the generator 12 to increase the speed. Of course, the generator 12 is stored in the storage case 20 in order to prevent water contact. The hydraulic power generator is provided with a hook 18 for suspension. Next, a method of using the reaction water turbine provided with the weir plate of the present embodiment will be described.

FIG. 4 is a perspective view showing a state in which the hydroelectric power generation device of the present invention is installed in a waterway in a flush manner.

A wire rope is hung on a hook 18 of the hydroelectric generator, and the direction is determined so that the generator 12 is on the upstream side and the weir plate 4 at the tip of the draft tube 2 is on the downstream side. Put the weir plate 4 in the inside and suspend it until the weir plate 4 reaches the bottom of the river.

Since the weir plate 4 closes the waterway or river and the guide vanes 9 are fully closed, the draft tube 2 is closed.
The water does not flow into the inside, the water is blocked, the dam is automatically formed, the water level rises, the water overflows the weir plate 4, and the hydroelectric generator is submerged.

In order to prevent the water from leaking from the periphery of the weir plate 4, if the weir plate is short, it is preferable to throw stones or the like on both sides of the weir plate to stop the dam.

When the hydraulic power generator is installed in this manner, a drop occurs between the level of the water surrounding the turbine 6 and the level of the water outlet 3 at the tip of the draft tube 2. Therefore,
When the guide vane 9 is opened, water flows in from the guide vane 9, passes through the runner 7, enters the draft tube 2, and flows out from the water outlet 3 at the tip while reducing the flow velocity in the draft tube 2. I do. During this time, water acts on the runner 7 to rotate the water wheel. In addition, since it is necessary to keep the head constant, the flow rate is adjusted by the guide vanes 9 so that the inflow water amount and the outflow water amount become the same. Of course, since the flow rate at the location point has been measured in advance, it is sufficient to design a water turbine that matches the flow rate.

Since the level of the water flowing out of the water outlet 3 of the draft tube 2 needs to be constantly maintained above the water outlet, for example, a fill stone 19 is provided outside the weir.

In this way, the turbine is rotated by hydraulic power, and the rotation is transmitted to the generator 12 by the transmission device 11, and when the generator 12 rotates, electric power is generated. In addition, when removing hydropower equipment due to changes in site conditions such as floods and waterway repairs,
What is necessary is just to suspend the hydraulic power generation device by hanging a wire rope on the hook 18 and remove it.

In the embodiment, the mechanism described in Japanese Patent Publication No. 7-18399 (Patent No. 1995318) is used as the flow rate adjusting mechanism, but a conventional guide vane opening / closing mechanism may be employed. .

Further, a plurality of hydraulic power generators of the present invention can be arranged to form a weir to increase the amount of power generation.

[0023]

According to the present invention, the water turbine is rotated by simply throwing and installing the water turbine and the hydraulic power generator provided with the weir plate into a river or a waterway having a flow of water, and the hydraulic power generator rotates to generate electric power. At that time, the output can be adjusted by adjusting the height of the weir plate.

Further, the amount of water can be controlled by adjusting the guide vanes of the thrown device itself, and the output can be adjusted. Therefore, the generated output can be easily adjusted by the height of the weir plate attached to the water turbine. In addition, since it is a flush type that does not require a large-scale civil engineering construction work, its dispersal is easy.

As the turbine generator, a compact model can be used. The turbine generator can be easily installed at a low-drop hydro station regardless of the flow rate, and can be operated while maintaining the optimum efficiency.

[Brief description of the drawings]

FIG. 1 is a side view of a hydroelectric generator using a flood-type reaction water turbine provided with a weir plate of the present invention.

FIG. 2 is a plan view of a hydroelectric generator using a flood-type reaction water turbine provided with a weir plate of the present invention.

FIG. 3 is a cross-sectional view of a hydroelectric generator using a flood-type reaction water turbine provided with a weir plate of the present invention.

FIG. 4 is a perspective view showing a state in which the hydraulic power generation device of the present invention is installed in a waterway in a throw-in manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water passage 2 Draft tube 3 Water outlet 4 Weir plate 5 Opening 6 Reaction type water wheel 7 Runner 8 Flow rate adjustment ring 9 Guide vane 10 Operating lever 11 Transmission device 12 Generator 13 Pri 14 V belt 15 Pulley 16 V belt 17 Pulley 18 Hook 19 Moriishi 20 Storage case

Claims (2)

[Claims] 1. An L-shaped draft tube having a water inlet provided at an upper portion of a water passage and a water outlet provided at a lower portion, an opening is provided at a tip of the water outlet, the damper plate having an opening corresponding to the water outlet. A water turbine provided with a dam plate, wherein a reaction type water turbine is provided in a water passage. 2. An L-shaped draft tube having a water inlet provided at an upper portion of a water passage and a water outlet provided at a lower portion, an opening is provided at a front end of the water outlet so as to correspond to the water outlet. Is fixed, and a reaction water turbine is provided in the water passage,
A hydroelectric power generator having a dam plate, wherein a power generator is provided via a transmission device for transmitting the rotation of a reaction water turbine.