WO2008007567A1

WO2008007567A1 - Irrigation facility utilizing water channel

Info

Publication number: WO2008007567A1
Application number: PCT/JP2007/063127
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: TW200811337A; JPWO2008007567A1; JP5132558B2

Abstract

[PROBLEMS] To prevent water from overflowing out of a water channel in an irrigation facility without installation of a special apparatus when the irrigation facility is disordered. [MEANS FOR SOLVING THE PROBLEMS] In hydraulic power generation apparatuses (100a to 100d) utilizing the water channel (10), weirs (11 to 14) are so provided as to extend transversely while bending in the water channel (10).

Description

Specification

Water utilization facilities using waterways

Technical field

TECHNICAL FIELD [0001] The present invention relates to a water utilization facility that uses a waterway that has a waterway force that is unlikely to overflow.

Background art

[0002] In recent years, there are water utilization facilities that use waterways (for example, existing agricultural waterways and irrigation waterways) to use water such as water intake and power generation. There is one that generates water by using water or using a water level difference generated by providing a weir. In such water utilization facilities, a linear weir 1 has been provided so as to cross the water channel 10 as shown in FIGS. 3A and 3B.

[0003] As related documents related to this, JP 2003-269315 A, JP 2005

-There is power, such as 320883 gazette.

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, in the water utilization facility using the above-mentioned water channel, the top of the weir is designed to be high in order to improve water intake efficiency or power generation efficiency. For this reason, if a malfunction occurs in the water intake or generator, the amount of water that has been blocked increases and the water overflows the weir, making it easier for the water to overflow. In particular, when a straight weir is installed in the waterway as in the conventional water utilization equipment, the overflow length of the weir is short, so the water depth beyond the weir increases (the relationship between overflow length B and water depth h is 3A and 3B and the relational expression described later: Q = CBh ^3/2 ), and the waterway force is likely to overflow.

[0005] For example, in the water utilization facilities shown in FIGS. 3A and 3B, a discharge path 4 communicating with the generator 3 is provided near the bottom of the weir 1, and the generator 3 is operating normally. Occasionally, water flows out downstream of the weir 1 through the discharge channel 4. However, in the event of an emergency when the generator 3 is malfunctioning, water does not flow out of the discharge channel 4, and the water flow is blocked by the weir 1. Then, when the amount of water blocked increases, the water begins to overflow the weir 1. At this time, if the water depth h exceeding the weir 1 becomes high, water tends to overflow from the side wall 2 of the water channel 10. As described above, the conventional water channel 10 is provided with the straight weir 1 and the overflow length of the weir 1 Because B is the shortest, the water depth h exceeding the weir 1 becomes high, and water easily overflows from the side wall 2 of the water channel 10! /.

[0006] Therefore, in the conventional water use facilities that are powerful, special facilities such as raising the side wall 2 of the water channel 10 to prevent the water from overflowing from the water channel 10 or providing a gate in the weir 1 are separately provided. It was provided. However, providing such equipment increases the cost. Moreover, even if facilities such as gates are provided, there is a concern that the response to facility operations may be delayed or that facilities may be malfunctioning, and the possibility of water overflowing from the channel 10 cannot be excluded.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to prevent water from overflowing when the water utilization facility malfunctions without installing special facilities. The purpose is to provide water utilization facilities using waterways.

Means for solving the problem

[0008] In order to solve the above-described problem, the present invention provides a water utilization facility that uses a water channel for providing water by providing a weir in the water channel, and the weir is provided so as to cross the water channel while being bent. It is characterized by that.

[0009] The planar shape of the weir is preferably a crank type, a concave type, a convex type, or a labyrinth type. Further, as the water utilization facility, for example, a hydroelectric power generation facility may be provided.

[0010] According to the configuration described above, the overflow length of the weir becomes longer than in the case where a straight weir is provided in the water channel as in the prior art. Therefore, when the water depth over the weir becomes low, water overflows from the waterway. Therefore, it is possible to prevent water from overflowing from the waterway when water supply facilities are not in good condition.

[0011] Cross-reference with related literature

This application claims priority based on Japanese Patent Application No. 2006-193056 filed on July 13, 2006. This document is incorporated herein by reference.

Brief Description of Drawings

FIG. 1A is an upper plan view schematically showing a weir plane shape force S-crank type hydroelectric power generation facility using a water channel in an embodiment of the present invention.

FIG. 1B is an upper plan view schematically showing a hydroelectric power generation facility using a water channel in an embodiment of the present invention and having a concave weir planar shape. FIG. 1C is an upper plan view showing an outline of a hydroelectric power generation facility using a water channel in an embodiment of the present invention and having a convex weir planar shape.

FIG. 1D is an upper plan view showing an outline of a hydroelectric power generation facility using a water channel in an embodiment of the present invention and having a labyrinth-type weir planar shape.

FIG. 2 is a perspective view showing details of the hydroelectric power generation facility.

FIG. 3A is an upper plan view for explaining a conventional hydroelectric power generation facility.

FIG. 3B is a view taken along line V—V in FIG. 3A.

Explanation of symbols

[0013] 1, 11-14 Weir

2 Side wall

3 Generator

4 Discharge channel

10 waterway

100 Hydropower generation facilities

Q Overflow rate of water flowing over the weir

B Weir overflow length

h Water depth over the weir

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1A to 1D and FIG. 2, taking a hydroelectric power generation facility as an example of a water utilization facility. 1A to 1D are upper plan views showing an outline of the hydroelectric power generation facility in the present embodiment, and FIG. 2 is a perspective view showing details of the hydroelectric power generation facility. In FIGS. 1A to 1D and FIG. 2, the same or similar parts as those in FIGS. 3A and 3B are denoted by the same reference numerals, and only different parts are denoted by new reference numerals.

[0015] The hydroelectric power generation facilities 100a to 100d shown in FIGS. 1A to 1D are provided with weirs 11 to 14 having different planar shapes in the existing water channel 10, respectively, and generate electric power by using the water level difference generated thereby. In each of the weirs 11 to 14, a discharge path 4 is provided near the bottom, and a generator 3 is provided via the discharge path 4. Examples of the generator 3 include an underwater turbine generator manufactured by IMEL Industrial Co., Ltd. In the example of Fig. 2, the discharge channel 4 is connected to the weir 11. By constructing the body with concrete and installing the generator 3 at the end of the discharge channel 4 opposite to the discharge port 4a, the weir 11, the discharge channel 4, and the generator 3 are integrated into a unit. Yes.

[0016] The weirs 11 to 14 are provided so as to cross the water channel 10 while being bent, and the planar shapes thereof are a crank type (see FIGS. 1A and 2), a concave type (see FIG. 1B), and a convex type (see FIG. 1B). It is a labyrinth type (see Fig. 1D). More specifically, in the case of the crank type shown in FIGS. 1A and 2, the weir 11 is bent in the water channel 10 twice. On the other hand, in the case of the concave type or convex type shown in FIGS. 1B and 1C, each is configured so as to be convex toward the downstream side or the upstream side of the water channel 10, both of which are located at the lowest in the water channel 10. Bent more than 4 times. In the case of the labyrinth type shown in FIG. 1D, the inside of the water channel 10 is bent at least once and configured in a W shape. However, in the present invention, the configuration of the weir is not limited to that shown in FIGS. 1A to 1D. In short, it is sufficient that the weir is provided so as to cross the water channel while being bent. Further, the direction of the drainage channel 4 is not limited to that shown in FIGS. 1A to 1D, and can be set as appropriate.

[0017] As described above, since the weirs 11 to 14 are provided so as to cross the water channel 10 while being bent in any case, the linear weir 1 (conventional technology) is provided in the same water channel 10. Compared to the case where the weirs are provided (see Fig. 3A, Fig. 3B), the overflow length B of each weir 11-14

a to d become longer. Therefore, even in an emergency when the generator 3 is malfunctioning, the water depth h exceeding the weirs 11 to 14 is lower than in the conventional case, and water does not easily overflow from the water channel 10.

That is, in the hydroelectric power generation facilities shown in FIGS. 1A to 1D and FIG. 2, the discharge path 4 communicating with the generator 3 is provided near the bottom of the weir 1 as described above. During normal operation, the water flows out to the downstream side of the weir 1 through the discharge channel 4. However, in the event of an emergency when the generator 3 is malfunctioning, water does not flow out of the discharge channel 4, and the water flow is blocked by the weir 1. And when the amount of water blocked is increased, the water begins to overflow the weir 1. In that case, Q = CBh, where Q is the overflow rate of water flowing over weirs 11-14, B is the overflow length of weirs 11-14, and h is the water depth exceeding weirs 11-14

a-d

^3/2 (C is a constant; approximately 1.84) (see Figure 3B). In the relational expression, if the overflow rate Q is constant and the overflow length B is increased as described above, the water exceeding the weirs 11-14

a-d

Depth h decreases. When the water depth h is lowered, the force such as the side wall 2 of the water channel 10 overflows (see FIG. 3B). Therefore, in the present embodiment, the maximum value of the water depth h is set so that a difference (= talarance) between the height of the side wall 2 and the height of the water exceeding the weirs 11 to 14 is sufficiently secured. Water depth h force S Increase overflow length B so that it is less than this value. In case of power, even if it flows through channel 10

a-d

Even if the water overflows the weirs 11 to 14, it does not overflow the side wall 2 of the water channel 10, so that the water overflows from the water channel 10. For this reason, in the hydroelectric power generation facilities 100a to 100d shown in FIGS. 1A to 1D and 2, it is necessary to raise the side wall 2 of the water channel 10 or to provide a gate or a special facility on the weirs 11 to 14. Absent. Therefore, according to the hydroelectric power generation facilities 100a to 100d described above, it is possible to prevent the flood water from overflowing when the water utilization facility does not function properly without installing special facilities.

[0020] By the way, the water flowing through the water channel 10 flows downstream while being narrowed by the side wall surfaces of the bending weirs 11 to 14 (see arrows in FIGS. 1A to 1D). Therefore, compared to the case where the straight weir 1 (see Fig. 2) is provided in the same water channel 10, each of the weirs 11 to 14 has a portion where the water level difference becomes large. Therefore, it is also possible to improve the power generation efficiency by providing the generator 3 at each of the weirs 11-14.

[0021] It should be noted that the water utilization equipment of the present invention is not limited to the above-described hydroelectric power generation equipment, but of course includes water intake equipment provided with a water intake pump in place of the generator 3 and the discharge passage 4. It is.

Industrial applicability

[0022] According to the present invention, in a water utilization facility using a water channel, it is possible to prevent water from overflowing the water channel when the water utilization facility does not have a special facility.

Claims

The scope of the claims

[1] Water utilization equipment using a waterway that uses a weir with a weir in the waterway,

A water utilization facility using a waterway, characterized in that the weir is provided so as to cross the waterway while bending.

[2] In the water utilization facility using the waterway according to claim 1,

The water utilization facility using a water channel, wherein the planar shape of the weir is any one of a crank type, a concave type, a convex type, and a labyrinth type.

[3] In the water utilization facility using the waterway according to claim 1 or 2,

The water utilization facility is a water supply facility using a water channel, wherein the water utilization facility is a hydroelectric power generation facility.