JPS5819861B2 - 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, with this conventional elevating type power generation equipment, the discharge special code for water volume adjustment raises the gate, which changes the effective head, and also causes large water pressure fluctuations downstream of the gate because the power generation discharge and bottom discharge are performed at the same time. occurs, and the effective head, flow rate, and output of the turbine fluctuate.

Furthermore, the vibrations of the gate and water turbine generator will increase.

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.

Furthermore, since the upper part of the water turbine generator at the gate is not open, the vibration from the water turbine generator increases, which not only reduces the service life of the water turbine generator, but also causes damage to the gate. This will also reduce the water stopping effect.

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. The point of providing an elevating type power generation equipment that can be relaxed.

In order to achieve the above object, the elevating power generation equipment of the present invention has the following features:
A main gate that can be raised and lowered is provided in the discharge channel, a water turbine generator is provided at the bottom of this main gate, and a portion of the main gate remains on the left and right with respect to the water flow direction, and there is a generator on the upstream and downstream sides. form four parts each closed by a skin plate,
A water injection hole is formed in the lower part of the upstream skin plate, and a water injection gate that can be opened and closed is provided in the water injection hole, and a drainage hole is further formed in the lower part of the downstream skin plate, and a drainage gate that can be opened and closed is provided in the lower part of the downstream skin plate. There is a game if for you.

According to this configuration, by opening the water injection gate and the drainage gate to open the water injection hole and the drainage hole, the water turbine generator can be operated in a fixed position, that is, without raising the main gate. Water can be discharged, and by closing the drain hole with the water injection hole open, the recess is filled with water, making it possible to submerge most of the main gate along with the water turbine generator.

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.

Each waterway 3 is provided with a main gate 5 that can be raised and lowered and placed on a support base 4, and this main gate 5 is constructed by, for example, attaching a water-stopping skin plate to a suitable position on a framework structure. be done.

A plurality of water turbine generators 6 are installed in the lower part of each main gate 5 in the horizontal direction G2.

The installation is carried out by placing the support leg 8 from the water turbine generator 6 on a pedestal 7 provided on the main gate 5.

The water turbine generator 6 is composed of an upstream generator main body 9 and a downstream suction pipe 10.

A water turbine closing gate 11 is provided at the suction port of the generator main body 9 to adjust the amount of water and shut off water.

Further, a screen 12 is provided upstream of the main gate 5.

13 indicates the main roller. A recessed portion 14 is formed in the upper part of the main gate 5 so that a portion remains on the left and right sides with respect to the water flow direction, and the remaining portion serves as a water stop and a connection portion for an elevation drive device.

The upstream skin plate 15 and the downstream skin plate 1 are arranged so as to close the upstream and downstream sides of the recess 14.
6 is provided.

The lower part of the upstream skin plate 15 has a water injection hole 1T.
is formed, a water injection gate 18 that can open and close this water injection hole 17, and a cylinder 1 that raises and lowers this water injection gate 18.
9 are arranged on the inner surface side of the upstream skin plate 15.

Further, a drainage hole 20 is formed in the lower part of the downstream skin plate 16, and a drainage gate 2 that can open and close this drainage hole 20 is provided.
1, and a cylinder 22 that raises and lowers this drainage gate 21.
are arranged on the outer surface side of the downstream skin plate 16.

By raising the water injection gate 18 to open the water injection hole 11 and lowering the drainage gate 21 to close the drainage hole 20, the recess 14 can be filled with water, thereby submerging most of the main gate 5. It can be done.

In this state, the water turbine generator 6 can be operated by moving the water turbine closing gate 11 upward as shown by the imaginary line in FIG. 2 to open the suction port.

At this time, vibrations from the water turbine generator 6 can be alleviated by filling the recess 14 with water.

When discharging water from this state, the drain gate 21 may be raised to open the drain hole 20.

Even during this discharge, the water turbine generator 6 is operated at a fixed position.

When repairing or inspecting the water turbine generator 6 or the gates 5, 11, 18, 21, etc., the water injection gate 18 is first lowered and the water injection hole 17 is closed.

Then, the drain gate 21 is raised to open the drain hole 20, and the water in the recess 14 is drained and dried.

This allows the main gate 5. can reduce the water load.

Furthermore, as shown by the solid line in FIG. 2, the water turbine closing gate 11 is lowered to close the suction port, and the main gate 5 is raised and lowered.

. In the above embodiment, the gate water stop line is placed on the downstream side to eliminate the influence of the vibrating water from the suction pipe 10, but it may be placed on the upstream side or both.

In the above embodiment, the water turbine closing gate 11 is provided at the suction port of the water turbine generator 6 and the conventional butterfly valve is omitted. Therefore, the length of the water turbine generator 6, that is, the thickness of the main gate 5 is Can be made smaller.

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

By opening the water injection gate and drainage gate to open the water injection hole and drainage hole, it is possible to adjust the water volume with the water turbine generator in the fixed position, that is, without raising the main gate. Water can be released.

Therefore, water can be discharged without changing the effective head, flow rate, or output of the water turbine, making stable power generation possible at all times.

Furthermore, the desired power generation can be continued even during discharge.

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

In addition, by closing the drainage hole, the recess is filled with water, making it possible to submerge most of the main gate along with the water turbine generator. Therefore, the water load applied to the recess reduces vibrations from the water turbine generator. This can improve the service life of the water turbine generator and also improve the water-stopping effect of the gate.

In addition, by closing the water injection hole and opening the drain hole to remove water from the recess and keep it dry, the main gate side can be raised and lowered with a reduced water load.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal side view;
FIG. 2 is a longitudinal cross-sectional side view of the main part, FIG. 3 is a cross-sectional plan view thereof, and FIG. 4 is a front view thereof. 1... Dam, 3... Spillway, 5...
... Main gate, 6... Water turbine generator, 9...
... Generator main body, 10 ... Suction pipe, 11.
... Water turbine closing gate, 12 ... Screen, 14 ... Concavity, 15 ... Upstream skin plate, 16 ... Downstream skin Plate, 17...Water injection hole, 18...Water injection gate, 20...Drainage hole, 21...Drainage gate.

Claims (1)

[Claims] 1. A main gate that can be raised and lowered is provided in the discharge channel, a water turbine generator is provided at the bottom of this main gate, and a portion remains on the left and right with respect to the water flow direction at the top of the main gate, and there are two main gates on the upstream and downstream sides. A water injection hole is formed in the lower part of the skin plate on the upstream side, and a water injection hole 1 that can be opened and closed is provided in the lower part of the skin plate on the downstream side. An elevating type power generation equipment characterized by forming a hole and providing a drainage gate If that can open and close the drainage hole.