JPS5819863B2 - Elevating power generation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevating type power generation equipment that can be used in places with a head such as rivers and waterways.

In conventional hydroelectric power plants, the waterway section and the power generation section were built separately.

In other words, the power generation section was placed on the side of the waterway section.

According to this, when installing the power generation part, it is necessary to excavate and widen the inside of the cylinder, which requires a very large amount of civil engineering work.

As a solution to this problem, there is a so-called elevating type power generation equipment in which a water turbine type generator is attached to a gate that can block water and discharge water.

However, in this conventional elevating type power generation equipment, the gate is raised when discharging water to adjust the water volume, so the effective head changes, and since the power generation discharge and bottom discharge are performed simultaneously, large water pressure fluctuations occur on the downstream side of the gate. The effective head, flow rate, and output of the water turbine fluctuate, and the vibration of the gate and water turbine generator increases.

In addition, the suction pipe must be submerged in water, but if the water level on the downstream side is low, raising the gate will cause the suction pipe to be located above the water surface, causing damage to the turbine due to cavitation and reducing the effective water level. This makes it impossible to generate electricity.

Therefore, there is a problem in that the operation of the water turbine generator must be stopped during discharge.

Furthermore, it is difficult to fix the gate during intermediate discharge.

In addition, since the area above the water turbine generator at the gate is open and there is nothing above it, the vibration from this water turbine generator increases, which not only reduces the service life of the water turbine generator, but also causes the gate to stop. The water effect will also be reduced.

Furthermore, in another conventional elevating type power generation equipment, the suction pipe and the generator body are separated, the generator body is attached to the gate, and the suction pipe is buried in a concrete weir constructed in the downstream waterway. However, according to this proposal, the effective number of river types (water flow area) cannot be secured, and -
There is a problem in that when rivers overflow during floods, sand accumulates on the upstream side of concrete weirs.

In addition, although it is possible to adjust a small amount of flow rate when discharging power generation, in order to adjust the flow rate other than discharge of power generation, the gate must be raised together with the generator itself, which is the same problem as the conventional type mentioned at the beginning. will occur.

Furthermore, in both conventional types, the water turbine generator and the generator main body must be pulled up together with the gate during repairs, inspections, or in the event of a flood, and a large power lifting drive device is required.

The purpose of the present invention is to be able to prevent fluctuations in head, water volume, and output during discharge, and also to be able to adjust the water volume while operating the water turbine generator in a fixed position, and to prevent vibrations from the water turbine generator. It is an object of the present invention to provide an elevating type power generation equipment that can reduce the amount of sedimentation caused by flooding and prevent the accumulation of sediment during floods, and that can raise and lower the water turbine type generator using a small power elevating drive device.

In order to achieve the above object, the elevating power generation equipment of the present invention has the following features:
A water turbine generator is divided into a generator main body and its suction pipe so as to be connectable, the generator main body is provided so as to be movable up and down in the spillway, and a main gate is provided on the downstream side of the generator main body in the spillway. The main gate is provided with the suction pipe and the water turbine closing gate, and an overflow auxiliary gate is further provided on the main gate.

According to this configuration, by lowering the auxiliary gate, water can be discharged while the water turbine generator is in a fixed position, that is, without raising the main gate. Furthermore, in the event of a flood, the generator body and the main gate can be pulled up to allow unobstructed discharge of water, and the generator body can be pulled up separately from the main gate.

An embodiment of the present invention will be described below based on the drawings.

1 is a dam, and a plurality of waterways 3 are formed by piers 2.

A frame body 5 that can be raised and lowered and placed on a support base 4 is disposed in each waterway 3, and each frame body 5 has a plurality of generator bodies 6 arranged in a row in the horizontal direction. installed.

The attachment is carried out by placing the support legs 8 from the generator main body 6 on a pedestal 7 provided on the frame 5.

A screen 10 is attached to the front and upper portions of the frame 5 via connecting rods 9.

Note that the frame body 5 and the screen 10 may be arranged separately.

A suction pipe 11 is connected to the downstream side of the generator body 6, and these 6 and 11 connect the water turbine generator 1.
2.

The suction pipe 11 is attached to a main gate 13, and the main gate 13 has a water turbine closing gate 1 having a communication hole 14.
5 is provided.

At the upper end of the main gate 13, a sub-gate 17 whose lower end is attached via a horizontal shaft 16 and which can be raised or lowered is disposed.

As shown in the figure, the main gate 13 is placed on the floor, and the sub gate 17
The generator main body 6 can be submerged by standing up the generator,
Therefore, the water turbine closing gate 15 is moved up and the communication hole 14 is closed.
The water turbine generator 12 can be operated by facing each other.

The vibrations from the water turbine generator 12 that occur at that time are transmitted to the discharge channel 3.
It can be alleviated by filling with water.

When releasing water from this state, it is sufficient to completely lower the sub-gate 17 or allow it to fall halfway.

Even during this discharge, the water turbine generator 12 is operated at a fixed position.

When repairing or inspecting the generator main body 6, it is sufficient to lift it up separately from the main gate 13 as shown in the drawings.At this time, since the water pressure is received on the main gate 13 side, the lifting and lowering should be done under conditions with little water pressure resistance. It takes place below.

Furthermore, in the event of a flood, the generator main body 6 and the main gate need only be pulled up separately, thereby allowing water to be discharged through the spillway 3 without any obstructions.

As shown in the embodiment, the length of the water turbine generator 12 can be shortened by providing the main gate 13 with the water turbine closing gate 15 and omitting the conventional butterfly valve.

According to the elevating power generation equipment of the present invention, the following effects can be expected.

That is, by lowering the auxiliary gate, water can be discharged to adjust the amount of water while the water turbine generator is in a fixed position, that is, without raising the main gate.

Therefore, discharge can be performed without perturbing the effective head, flow rate, or output of the water turbine, making it possible to always generate stable power generation, and to continue generating power as expected even during discharge.

Moreover, the main gate can be easily and firmly fixed during intermediate discharge.

In addition, the generator body can be submerged in water by the landing of the main gate, so vibrations from the generator body due to water load can be alleviated, improving the service life of the generator body, and the main gate has a water-stopping effect. can also be improved.

Furthermore, in the event of a flood, by pulling up the generator body and the main gate, water can be discharged without any obstructions, and sediment accumulation can be prevented.

Moreover, the generator body can be pulled up separately from the main gate.
Therefore, the power of the lifting drive device can be reduced.

[Brief explanation of the drawing]

The drawing is a longitudinal side view showing an embodiment of the present invention. 1... Dam, 3... Spillway, 5...
... Frame, 6... Generator body, 10...
... Screen, 11 ... Suction pipe, 12 ...
...Waterwheel generator, 13...--Main gate, 15
・・・・・・Gate for closing water turbine, 1γ・・・・Sub-gate.

Claims (1)

[Claims] 1 A water turbine generator is divided into a generator main body and its suction pipe so as to be connectable, the generator main body is provided so as to be movable up and down in the spillway, and a main gate is provided on the downstream side of the generator main body in the spillway. 1. An elevating type power generation facility, characterized in that the main gate is provided with the suction pipe and the water turbine closing gate, and furthermore, an overflow sub-gate is provided above the main gate.