WO2008007568A1

WO2008007568A1 - Water utilization facility utilizing step structure of existing water utilization channel

Info

Publication number: WO2008007568A1
Application number: PCT/JP2007/063128
Authority: WO
Inventors: Hajime Butsuhara; Akira Irie
Original assignee: The Chugoku Electric Power Co., Inc.
Priority date: 2006-07-13
Filing date: 2007-06-29
Publication date: 2008-01-17
Also published as: JP5143001B2; TW200809055A; JPWO2008007568A1

Abstract

[PROBLEMS] A water utilization facility using a step structure in a water utilization channel, in which unused potential energy is utilized without major modification of the channel. [MEANS FOR SOLVING THE PROBLEMS] The water utilization facility utilizes the step structure (1) of the existing water utilization channel (10). On the downstream side of the step structure (1) constructed as a structure of the channel (10), there is built a water tank (100) by constructing a weir (11) surrounding the step structure (1). Water in the water tank (100) is utilized for various purposes.

Description

Specification

Water utilization facilities using steps in existing waterways

Technical field

TECHNICAL FIELD [0001] The present invention relates to a water utilization facility that uses a step of an existing water channel that can effectively utilize unused step energy in the existing water channel.

Background art

[0002] In recent years, there has been a technology for utilizing water such as water intake or power generation by using a step of an existing water channel (for example, an existing agricultural water channel or an irrigation water channel). In the conventional technology, it is usual to provide a weir on the upstream side of the level difference to secure a water level difference, and to use the step energy generated by this level difference for water utilization (for example, special characteristics). (See Open 2003-269315, JP 2005-320883).

Disclosure of the invention

Problems to be solved by the invention

[0003] However, when water is provided with a weir on the upstream side of the step as in the above-described conventional technology, it is necessary to perform a major renovation work around the step work in order to ensure a sufficient water level difference. As a result, there are problems such as an increase in the cost of installing water utilization equipment.

[0004] The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an existing water channel that can effectively utilize unused step energy without performing extensive repair work on the existing water channel. The purpose is to provide water utilization facilities using the difference in level.

Means for solving the problem

[0005] In order to solve the above-mentioned problems, the present invention is a water utilization facility that uses a stepped portion of an existing waterway, and is provided with a weir on the downstream side of the stepped portion constructed as a structure of the existing waterway, It comprises, and water is utilized using the water in this water tank, It is characterized by the above-mentioned.

[0006] Further, in the present invention, the water utilization facility may be a hydroelectric power generation facility provided with an underwater generator in the water tank.

[0007] Further, in the present invention, the step is a drop formed so as to cross the riverbed of the existing irrigation channel. [0008] According to the above configuration, since the weir is provided on the downstream side of the stepped portion, unlike the conventional configuration in which the weir is provided on the upstream side of the stepped portion to ensure the water level difference, the existing waterway is significantly improved. There is no need for construction. In addition, since the aquarium was constructed with a weir so as to surround the step, unused step energy was stored in this aquarium, and the powerful step energy could be effectively used for water utilization. It becomes possible.

[0009] <Cross-reference with related literature>

This application claims priority based on Japanese Patent Application No. 2006-193057 filed on July 13, 2006. This document is incorporated herein by reference.

Brief Description of Drawings

FIG. 1A is an explanatory diagram of a hydroelectric power generation facility according to a first embodiment of the present invention, and is a perspective view showing a situation before application of the present invention.

FIG. 1B is an explanatory diagram of the hydroelectric power generation facility according to the first embodiment of the present invention, and is a perspective view showing a situation after application of the present invention.

FIG. 2A is an explanatory diagram of a hydroelectric power generation facility according to a second embodiment of the present invention, and is a perspective view showing a situation before application of the present invention.

FIG. 2B is an explanatory diagram of the hydroelectric power generation facility according to the second embodiment of the present invention, and is a perspective view showing a situation after application of the present invention.

FIG. 3A is an explanatory diagram of a hydroelectric power generation facility according to a third embodiment of the present invention, and is a perspective view showing a situation before application of the present invention.

FIG. 3B is an explanatory diagram of the hydroelectric power generation facility according to the third embodiment of the present invention, and is a perspective view showing a situation after application of the present invention.

Explanation of symbols

[0011] 1 step

3 Underwater generator

10 Existing waterway

11 Weir

100 aquarium

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] <First embodiment>

1A and 1B are explanatory diagrams of the hydroelectric power generation facility according to the first embodiment of the present invention. FIG. 1A shows the situation before the application of the present invention, and FIG. 1B shows the situation after the application of the present invention. FIG.

[0014] The hydroelectric power generation facility shown in FIG. 1B is configured by forming a water tank 100 by providing a weir 11 (11a, lib) on the downstream side of the step 1 shown in FIG. 1A. The shape of the weir 11 is preferably, for example, a U-shape or U-shape in plan view.

The step 1 is constructed as a structure of the existing water channel 10 and constitutes a part of the existing water channel 10, and its upstream side leads to the tunnel 5. This step 1 has a steep slope. In FIGS. 1A and 1B, in order to configure the water tank 100 on the downstream side of the step 1, the bridge 2 over the step 1 is removed, and then the weir 11 b is installed on the downstream side of the step 1. In addition, a water tank 100 is constructed by combining 1 lb of weir and 1 la of weir.

An underwater generator 3 is provided at the bottom of the water tank 100, and the underwater generator 3 is connected to the weir 11 through the discharge path 4. 1A and 1B, the discharge channel 4 is constructed of concrete integrally with the weir 11, and the underwater generator 3 is installed at the end of the discharge channel 4 opposite to the discharge port 4a. 11. The discharge path 4 and the underwater generator 3 are united together. An example of the underwater generator 3 is an underwater turbine generator manufactured by Imml Industries Co., Ltd.

[0017] According to the above configuration, a certain amount of water is secured in the water tank 100, whereby the step energy is stored in the water tank 100. The underwater generator 3 uses the step energy stored in the aquarium 100 for hydroelectric power generation, so it is unused in the step 1 shown in Fig. 1A! It can be used effectively. In addition, as described above, in order to configure the water tank 100 on the downstream side of the step 1, it is only necessary to provide the weir 11 after removing the bridge 2 over the step 1, and therefore, in the vicinity of the step 1. No major renovation work is required. Therefore, according to the hydroelectric power generation facility according to the present embodiment, it is possible to effectively use unused step energy without performing a major renovation work on the existing canal 10. The configurations of the weir 11 and the water tank 100 are preferably designed so that the length of the side wall of the weir 11 is increased or the cross-sectional area of the water tank 100 is increased. In such a configuration, the overflow depth h of the water overflowing the side wall of the aquarium 100 is reduced in an emergency when the overflow length of the weir 11 is extended and the submersible generator 3 is out of order. relationship will be described later: see Q = CBh ^3/2), can be or overflowing water from the existing canal 10 on the upstream side of the step E 1, or a tunnel 5 is prevented from or a full water.

2A and 2B are explanatory diagrams of the hydroelectric power generation facility according to the second embodiment of the present invention, FIG. 2A shows the situation before the application of the present invention, and FIG. 2B shows the situation after the application of the present invention. FIG. However, in the following description, the same or similar parts as those in FIGS. 1A and 1B are denoted by the same reference numerals, and the explanation will focus on parts different from the first embodiment.

[0020] The hydroelectric power generation facility shown in FIG. 2B is configured by forming a water tank 100 by providing a weir 11 on the downstream side of the step 1 shown in FIG. 2A so as to surround the standing wall of the step 1). An underwater generator 3 similar to that in FIG. 1 is provided at the bottom of the water tank 100. Further, the standing wall of the step 1 is constructed as a structure of the existing water channel 10 and has a function of storing water upstream of the existing water channel 10. From the bottom side of the step 1, water flows out.

[0021] According to the above configuration, as in the first embodiment, a certain amount of water is secured in the aquarium 100, whereby step energy is stored in the aquarium 100. The underwater generator 3 uses the step energy stored in the water tank 100 for hydroelectric power generation, so it is unused in the step 1 shown in Fig. 2A! It can be used. Also in this embodiment, the water tank 100 is configured by using the standing wall of the step 1, and it is not necessary to perform significant renovation work around the step 1. Therefore, even in the hydroelectric power generation facility according to the present embodiment, it is possible to effectively use unused step energy that does not require a large renovation work on the existing canal 10.

[0022] The configurations of the weir 11 and the water tank 100 are designed such that the length of the side wall of the weir 11 is increased, or the cross-sectional area of the water tank 100 is increased, as in the first embodiment. Things are preferred. Even in the case of the cover construction, as described above, the overflow length of the weir 11 is extended and the water depth h is reduced, so that it is possible to prevent water from overflowing from the existing water channel 10. [0023] <Third embodiment>

3A and 3B are explanatory diagrams of the hydroelectric power generation facility according to the third embodiment of the present invention. FIG. 3A shows the situation before the application of the present invention, and FIG. 3B shows the situation after the application of the present invention. FIG. However, in the following description, the same portions as those in FIGS. 1A, 1B, 2A, and 2B are denoted by the same reference numerals, and the description is focused on portions that are different from the first and second embodiments.

[0024] The hydroelectric power generation facility shown in FIG. 3B is configured by forming a water tank 100 by providing a weir 11 on the downstream side of the step 1 shown in FIG. 3A so as to surround the step 1. An underwater generator 3 similar to that shown in FIGS. 1A, 1B, 2A, and 2B is provided at the bottom of the water tank 100.

The step 1 is formed as a structure of the existing water channel 10, and more specifically, is a drop formed so as to cross the river bed of the existing water channel 10.

The weir 11 is a planar shape force crank type, and a water tank 100 is formed in a region surrounded by the weir 11 and the standing wall of the step 1. The top end of the weir 11 is preferably set slightly lower than the height of the step 1. In this case, even if the water stored in the water tank 100 overflows from the water tank 100, the water flowing in the existing water channel 10 overflows from the weir 11, so that the side wall force of the existing water channel 10 does not easily overflow. .

By the way, the planar shape of the weir 11 is not limited to the shape of the present embodiment, and may be a concave shape, a convex shape, a labyrinth shape, a straight shape, or the like. More specifically, in the case of the concave type or the convex type, the weir 11 is provided so as to be convex toward the downstream side or the upstream side of the existing water channel 10, respectively, while in the case of the labyrinth type, for example, W Weirs 11 will be provided so as to have a letter shape.

[0028] According to the above configuration, a certain amount of water is secured in the water tank 100, whereby the step energy is stored in the water tank 100. The underwater generator 3 uses the step energy stored in the aquarium 100 for hydroelectric power generation, so the step energy 1 shown in FIG. It can be used effectively. Further, in the present embodiment, the water tank 100 is configured by using the standing wall of the step 1, and it is not necessary to perform a major repair work around the step 1. Therefore, according to the hydroelectric power generation facility according to the present embodiment, it is possible to effectively use the unused step energy without performing a major renovation work on the existing canal 10. [0029] When the planar shape of the weir 11 is the crank shape, the concave shape, the convex shape, the labyrinth type among the above shapes, the hydroelectric generator 3 is out of order compared to the straight shape. In an emergency, it has an excellent function of preventing water from overflowing from the existing canal.

That is, in the hydroelectric power generation facility shown in FIG. 3B, the bottom of the weir 11 is provided with the discharge passage 4 communicating with the underwater generator 3 as described above, and the underwater generator 3 operates smoothly. During normal operation, water flows out downstream of the weir 1 through the discharge channel 4. However, in the event of an emergency when the submersible power generator 3 malfunctions, water does not flow out from the discharge channel 4, and the water flow is blocked by the weir 11. Then, when the amount of water blocked increases, water begins to overflow the weir 11. In this case, Q = CBh ^3/2 (C is a constant) where Q is the overflow rate of water flowing over weir 11 and B is the overflow length of weir 11 and h is the depth of water beyond weir 11. About 1.84). In the relational expression, if the overflow rate Q is constant, if the water depth h beyond the weir 11 becomes high, the water on the side walls of the existing canal 10 will also overflow. In particular, when the planar shape of the weir 11 is a straight line, the overflow length B of the weir 11 is the shortest, and the water depth h exceeding the weir 11 becomes high, so that water tends to overflow from the existing canal 10. I'll end up. However, when the planar shape of the weir 11 is as described above (for example, the crank shape in FIG. 3B) as in this embodiment, the overflow length B of the weir 11 is extended, and as a result, the water depth h exceeding the weir 11 is As it becomes lower, it is difficult for the existing waterway 10 to overflow.

Industrial applicability

[0031] According to the present invention, it is possible to effectively utilize unused step energy without drastically renovating the existing water channel in the water utilization facility using the level difference of the existing water channel.

Claims

The scope of the claims

[1] Utilizing a step in an existing water channel characterized in that a weir is constructed downstream of a step formed as a structure of an existing water channel and a water tank is constructed and water is used using the water in the water tank. Water utilization equipment.

[2] In claim 1,

The water utilization facility is a water utilization facility using a step of an existing waterway, characterized in that the water utilization facility is a hydroelectric power generation facility having an underwater power generator in the water tank.

[3] In claim 1 or 2,

The water supply facility using the step of the existing canal is characterized in that the step is a drop formed so as to cross the riverbed of the existing canal.