JP2003222067A - Flow rate regulator and regulating method of hydraulic power equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that regulation of water flow induced to hydraulic power equipment is conducted with a flow regulating device corresponding to inflow to an intake, and the device is hardly applicable to small-sized equipment because a control circuit and a control mechanism are needed for this equipment; and an effective head can not be held due to water level lowering of the intake. <P>SOLUTION: Around an impeller there is a plurality of independent outlets, conducting tubes are connected to each outlet, and a plurality of intakes are installed corresponding to the each conducting pipe. A simple constitution eliminated the special control circuit or the control mechanism. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device and a control method for a hydroelectric power generation device in which a plurality of outlets are arranged around an impeller.

[0002]

2. Description of the Related Art Conventionally, in a hydroelectric power generation facility, a movable flow rate adjusting device has been used to adjust the flow rate in accordance with the inflow amount of a water intake. That is, in the hydroelectric power generation device in which a plurality of outlets are arranged around the impeller, the intake port is single,
Therefore, a single water conduit guides water to the vicinity of the hydroelectric generator, and then the single water conduit is divided into multiple water conduits near the hydroelectric generator, and the tip of each divided water conduit is multiple conduits. It is connected to the water outlet. Since the amount of water injected from each outlet varies according to the amount of water in a single intake, it is configured to be adjusted by a flow rate adjusting device that adjusts the amount of injection by a needle valve of a nozzle provided at the outlet. There is.

[0003]

In order to move the flow rate adjusting device according to the amount of inflow to the intake, the water level at the intake is detected,
A control circuit and a control mechanism for moving the flow rate adjusting device according to the detected water level were required. This system became a very large-scale system, and it was difficult to apply it especially to small hydroelectric power generation facilities. In addition, if the water level at the intake decreases, it may not be possible to maintain an effective head, so improvement is required.

An object of the present invention is to provide a flow rate adjusting device and an adjusting method for a hydroelectric power generation device which solves the above conventional problems with a simple structure.

[0005]

Claim 1 according to the present invention
The flow rate adjusting device of the hydraulic power generator described in (1) is a hydraulic power generator having a plurality of independent outlets arranged around the impeller, and a water conduit connected to each of the outlets, and each of the water conduits. The gist is to have a plurality of water intakes provided correspondingly.

According to a second aspect of the present invention, there is provided a flow rate adjusting device for a hydroelectric power generator, wherein the plurality of intake ports are arranged on the downstream side of the intake weir from the upstream side to the downstream side. To do.

According to a third aspect of the present invention, there is provided a flow rate adjusting device for a hydroelectric power generating device, wherein the plurality of water intakes are separated from each other by weirs.

According to a fourth aspect of the present invention, there is provided a method for adjusting a flow rate of a hydroelectric power generation device, wherein the water flow amount adjusting method for a hydroelectric power generation device has a plurality of outlets arranged around an impeller. The water flowing in from is divided in stages, and the divided water is caused to flow into the plurality of water intakes, and the water is introduced by the water pipes for each of the plurality of water intakes, and the water is connected to each of the water pipes. Another feature of the present invention is to inject an amount of flowing water corresponding to the amount of water stored in the corresponding intake port from each outlet to the corresponding impeller.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 to 4 show a case where the flow rate adjusting device of a hydraulic power generation device according to the present invention is applied to an impulse type water turbine. In addition, FIGS. 1 to 4 are diagrams according to the transition of water gradually increasing at the intake.

As shown in FIG. 1, the running water 1 is partitioned by a reservoir weir 2, and four intakes adjacent to the intake weir 2, namely, a first intake 3a, a second intake 3b, and a third intake. A water intake 3c and a fourth water intake 3d are installed. The first and second intakes 3a and 3b are separated from each other by a first weir 4a,
The second and third intakes 3b and 3c are separated from each other by a second weir 4b, and the third and fourth intakes are separated from each other by a third weir 4c.

The volumes of the first to fourth intakes 3a to 3d and the heights of the first weir 4a to the third weir 4c are set to be the same. Further, the first to fourth intake ports 3a to 3d are sequentially arranged from the upstream side to the downstream side with respect to the intake weir 2. A first water conduit 5a, a second water conduit 5b, a third water conduit 5c, and a fourth water conduit 5d are connected to each of the water intake ports 3a to 3d. These first to fourth water conduits 5a to 5d
The first outflow port 6a to the fourth outflow port formed of an injection nozzle
An outlet 6d is provided. The impeller 7 is rotated by the water jetted from the outlets 6a to 6d, and power is generated by a generator (not shown).

The operation of the embodiment of the present invention having such a configuration will be described with reference to FIGS. 1 to 4. When the running water 1 overflows the intake weir 2 as shown in FIG. 1, the overflowed water first flows into the first upstream intake port 3a. The water in the first intake port 3a has a first weir 4a between the second intake port 3b and the adjacent second intake port 3b.
Water is stored in the water intake 3a. The water in the first intake port 3a is
It is injected into the impeller 7 only through the first outlet 6a through the first water conduit 5a to rotate the impeller 7.

As described above, in the state shown in FIG.
The water that overflows the intake weir 2 flows into only the first intake port 3a,
It does not flow into the adjacent second intake port 3b and thereafter. Therefore,
No water is supplied to the water conduits connected to the second water intake port 3b and thereafter, and no water is jetted from the outlets other than the first outlet 6a. In the case of FIG. 1, even if the amount of water overflowing the intake weir 2 is small, it is possible to forcibly supply water only to the single first outlet 6a.

If the operation shown in FIG. 1 is attempted by the conventional technique, even a small amount of water will be supplied to each of the water pipes in a smaller amount. It also happens that the impeller cannot be rotated. Therefore, as described above, it is necessary to rely on the movable flow rate adjusting device that controls the jet nozzle at the outlet, and it is necessary to perform an operation to close the other nozzles so that the jet water is concentrated only on a single jet nozzle. There is. According to the present invention, the jet water can be concentrated only on the jet nozzle which is a single outlet without performing such an adjusting operation.

That is, FIG. 1 shows a case where the hydroelectric generator is operated at a flow rate of 1/4 or less of the rated flow rate, and running water 1 flowing from the upstream side, that is, the left side of FIG. , Into the first water intake 3a. After that, the first water conduit 5
It flows out from the injection nozzle of the 1st outflow port 6a through a, and acts on the impeller 7.

FIG. 2 shows a state in which the water overflowing the intake weir 2 fills the first intake port 3a and further flows over the first weir 4a into the second intake port 3b. In this case, water is supplied only to the first water guiding pipe 5a and the second water guiding pipe 5b, and therefore water is jetted only from both the jet nozzles of the first outlet 6a and the second outlet 6b.

That is, FIG. 2 shows a case where the hydroelectric generator of FIG. 1 is operated at a flow rate of 1/4 to 1/2 of the rated value. When the amount of inflow to the intake weir 2 exceeds the flow rate that can be taken by the first intake port 3a, that is, 1/4 of the rated flow rate of the power generation device, the flow rate that can be taken by the first intake port 3a, that is, the hydroelectric power generation. When the amount exceeds 1/4 of the rated flow rate of the device, the water overflowing from the first intake port 3a passes over the first weir 4a provided between the first intake port 3a and the second intake port 3b to the second weir 4a. It flows into the water intake 3b, and passes through the second water conduit 5b connected to the second water intake 3b to the second
It jets from the jet nozzle of the outlet 6b and acts on the impeller 7.

Similarly, FIG. 3 shows a state in which the water overflowing the first weir 4a fills the second intake 3b and further flows over the second weir 4b into the third intake 3c. There is. In this case, the first water conduit 5a and the second water conduit 5b
And the water is supplied only to the third water conduit 5c, and therefore the first
The water is jetted from the jet nozzles of the third outlets 6a to 6c.

That is, FIG. 3 shows a case where the flow rate of the hydroelectric power generator of FIG. 2 is further increased and the hydraulic power generation apparatus is operated at 1/2 to 3/4 of the rated flow rate. The flow rate into the intake weir 2 is such that it can flow into the first intake port 3a and the second intake port 3b, that is, 1/2 of the rated flow rate.
When it exceeds the above, the water overflowing from the second intake port 3b flows over the second weir 4b between the second intake port 3b and the third intake port 3c and flows into the third intake port 3c, and the third intake port It is injected from the injection nozzle of the 3rd outflow port 6c through the 3rd water conduit 5c connected to 3c, and acts on the impeller 7.

FIG. 4 shows a state in which the water filling the third water intake port 3c flows into the fourth water intake port 3d beyond the third weir 4c. In this case, water is supplied to all the water conduits of the first to fourth water conduits 5a to 5d, and
Water is jetted from the jet nozzles of all the first to fourth outlets 6a to 6d. Thus, in FIG. 4, the operation is performed at the rated flow rate.

[0021]

The flow rate adjusting device for a hydraulic power generation device according to the present invention makes it possible to highly efficiently change the flow rate flowing into the hydraulic power generation device without providing a special control circuit or control mechanism.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a state in which a water turbine is operated at a flow rate of ¼ or less of a rated flow rate in an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a state in which the water turbine is operated at a flow rate of 1/4 or more and 1/2 or less of the rated flow rate in the embodiment of the present invention.

FIG. 3 is a configuration diagram showing a state in which the water turbine is operated at a flow rate of ½ or more and 3/4 or less of the rated flow rate in the embodiment of the present invention.

FIG. 4 is a configuration diagram showing a state in which the turbine is operated at a flow rate of 3/4 or more of the rated flow rate and not more than the rated operation in the embodiment of the present invention.

[Explanation of symbols]

1 ... running water 2 ... Intake weir 3a, 3b, 3c, 3d ... First to fourth intake ports 4a, 4b, 4c ... First to third weirs 5a, 5b, 5c, 5d ... First to fourth water conduits 6a, 6b, 6c, 6d ... First to fourth outlets 7 ... impeller

Claims (4)

[Claims] 1. A hydroelectric power generation device having a plurality of independent outlets arranged around an impeller, wherein a water pipe connected to each of the outlets and a plurality of water pipes provided corresponding to each of the water pipes. A water flow adjusting device for a hydroelectric power generator. 2. The flow rate adjusting device for a hydroelectric power generator according to claim 1, wherein the plurality of intakes are arranged on the downstream side of the intake weir from the upstream side to the downstream side. 3. The flow regulating device for a hydroelectric power generator according to claim 1, wherein the plurality of water intakes are separated from each other by weirs. 4. A method for adjusting the outflow amount of water in a hydroelectric power generation device, wherein a plurality of outlets are arranged around an impeller, wherein the water flowing in from an intake weir is divided in stages, and each is supplied to a plurality of intakes. According to the amount of water stored in the corresponding intake from the outlets connected to each of the water pipes, by introducing the divided water into each of the plurality of water intake pipes. A method for adjusting a flow rate of a hydroelectric power generation device, comprising injecting a flowing water amount from each of the outlets to a corresponding impeller.