JPS6248069B2 - - 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 section, it is necessary to excavate and widen the river width, and the amount of civil engineering work will be extremely large. As a solution to such problems,
For example, as seen in Japanese Patent Application Laid-Open No. 55-139979, 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, there is a problem that the effective river area (water flow area) cannot be secured, and at the same time as the river overflows during floods, sand is deposited on the upstream side of the concrete weir. As a solution to this problem, there is a so-called elevating type power generation facility in which a water turbine type generator is attached to a gate that can block water and discharge water, as seen in, for example, Japanese Patent Application Laid-open No. 72943/1983. However, in this conventional elevating type power generation equipment, all of the suction pipes and half of the generator body are located downstream of the gate, so vortices occur downstream of the suction pipe when the power is discharged. As a result, the vibration of the gate and water turbine generator increases. Furthermore, when discharging water to adjust the amount of water, the gate is raised, so the effective head changes, and since power generation discharge and discharge through the lower end of the gate are performed at the same time, large water pressure fluctuations occur on the downstream side of the gate, and the effective head of the turbine changes. , flow rate, and output fluctuate, and the vibrations of the gate and water turbine generator also increase. Therefore, there is a problem in that the operation of the water turbine generator must be stopped when discharging water. In the case where a water turbine generator is attached to the gate, when these are raised and the water is discharged through the lower end of the gate, the discharged water is gradually compressed and flows turbulently just before the gate, and then flows under the lower end of the gate. Immediately after passing through, a portion of the discharged water becomes an upward turbulent flow, and this turbulent flow collides with the water turbine generator, causing adverse effects such as vibration.

The purpose of the present invention is to be able to prevent fluctuations in head, water volume, and output during discharge, and to adjust the water volume while operating the water turbine generator in a fixed position. An object of the present invention is to provide an elevating type power generation equipment that can alleviate the vibrations of water, prevent sediment accumulation during floods, and rectify discharged water when it is discharged through the lower end of the gate.

In order to achieve the above object, the elevating type power generation equipment of the present invention comprises a water turbine type generator consisting of a generator main body and a suction pipe connectable to the generator main body, and is installed in a discharge channel so as to be able to rise and fall. The suction pipe is attached to the main gate, the generator main body is attached to the frame integrated on the front side of the main gate, a rectifying plate is provided at the bottom of the frame, and a sub-gate for overflow is installed above the main gate. has been established.

According to this configuration, by tilting the auxiliary gate, water can be discharged while the water turbine generator is in a fixed position, that is, without raising the main gate. The entire generator body can be submerged in water upstream of the main gate, and in the event of a flood, the generator body can be pulled up together with the main gate etc. to discharge water without any obstructions. The discharged water passing under the gate can be rectified by a rectifier plate just before the lower end of the 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 a plurality of generator bodies 6 are attached to each frame body 5 in parallel in the horizontal direction. ing. Its installation is
This is done 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 connectably arranged on the downstream side of the generator main body 6, and these 6 and 11 constitute a water turbine generator 12. Here, the water turbine generator 12
is arranged to be inclined so that its axis 12A becomes lower toward the downstream side. The suction pipe 11 is attached to the main gate 13, and the frame 5 is integrated with the front side of the main gate 13. The main gate 13 is provided with a water turbine closing gate 15 having a communication hole 14 . A sub-gate 17 is disposed at the upper end of the main gate 13, the lower end of which is attached via a horizontal shaft 16, and which can be raised or lowered.
The structure is designed to allow overflow. Further, a current plate 18 is attached to the lower part of the frame 5 so as to be inclined so that the downstream side is lower. 19 is the upstream water level, 20
indicates the water distribution surface.

As shown in FIG. 1, the main gate 13 is installed,
By raising the auxiliary gate 17, the generator main body 6 can be submerged in water. Therefore, by raising the water turbine closing gate 15 and communicating the communication hole 14 with the suction pipe 11, the water turbine type generator 12
can be operated. Water turbine generator 1 generated at that time
Vibration from the main gate 13 can be relaxed and attenuated by filling with water upstream of the main gate 13. Further, vibrations of the suction pipe 11 itself can be absorbed by the main gate 13. When overflowing from this state, the sub-gate 17 may be completely lowered or partially lowered. Even during this overflow, the water turbine generator 12 is operated at a fixed position. In addition, when a large amount of water needs to be released during a flood, etc., the main gate can be opened by lifting the entire subgate 17 with a lifting device (not shown) as shown in Fig. 2 while it is in the upright position. 17
All you have to do is open the bottom of the bottom. At this time, the discharged water flows while being rectified by the rectifying plate 18 just before the main gate 17, so after passing under the lower end of the main gate, it is discharged without causing turbulence, and the turbulent flow flows into the water turbine generator 12. It has become possible to prevent vibrations of cavities, etc. Moreover, this allows water to be discharged through the water discharge channel 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 by overflowing while the water turbine generator is in a fixed position, that is, without raising the main gate. Therefore, even during this discharge, the water turbine generator can continue to generate the desired power at a constant position without fluctuations in water pressure. Furthermore, by placing the main gate on the floor, the entire generator body can be submerged in water on the upstream side of the main gate, so vibrations from the generator body can be alleviated and damped due to the water load, and furthermore, the suction pipe itself The vibrations can be absorbed by the main gate, which can improve the service life of the generator body and also improve the water-stopping effect of the main gate. Furthermore, when discharging a large amount of water, such as during a flood, by pulling up the generator body together with the main gate, water can be discharged through the lower end of the main gate without any obstructions, and sediment accumulation can be prevented. Moreover, since a rectifier plate is installed at the bottom of the frame integrated with the water turbine generator,
Since the discharged water passing below the lower end of the main gate flows from in front of the main gate while being rectified by the rectifying plate, no turbulent flow occurs, and vibrations due to turbulent flow in the water turbine generator can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal side view when landing, and FIG. 2 being a longitudinal side view when pulling up. 1... Dam, 3... Spillway, 5... Frame, 6...
... Generator main body, 10 ... Screen, 11 ... Suction pipe, 12 ... Water turbine generator, 13 ... Main gate, 15 ... Water turbine closing gate, 17 ... Sub gate, 18 ... Rectifier plate.

Claims (1)

[Claims] 1 A water turbine generator is constructed of a generator main body and a suction pipe connectable to the generator main body, the suction pipe is attached to a main gate that is movable up and down in the discharge channel, and the suction pipe is installed in front of the main gate. An elevating type power generation equipment, characterized in that the generator main body is attached to a frame integrated on the side, a rectifying plate is provided at the lower part of the frame, and a sub-gate for overflow is provided above the main gate.