WO2019059323A1

WO2019059323A1 - Flow path regulation device for hydraulic power generation device

Info

Publication number: WO2019059323A1
Application number: PCT/JP2018/034932
Authority: WO
Inventors: 浩氣向井
Original assignee: Ntn株式会社
Priority date: 2017-09-25
Filing date: 2018-09-20
Publication date: 2019-03-28
Also published as: JP7213011B2; JP2019060242A

Abstract

Provided is a flow path regulation device for a hydraulic power generation device, with which the effect of increasing flow velocity can be obtained while being hardly affected by the water level in a water path. The hydraulic power generation device (10) and the flow path regulation device (30) are installed in a flow path (2). The hydraulic power generation device (10) is provided with a turbine rotor (13) for converting water power into a rotating force, and a generator (19) which generates electric power using rotation of the turbine rotor (13). The flow path regulation device (30) is provided with: at least two water collecting plates (33, 33) which are arranged on the upstream side at a predetermined distance with respect to the turbine rotor (13) along the flow path (2), and which are opposed to each other at an interval in a width direction W of the flow path (2); and an interval setting mechanism (34) for setting the interval between the at least two water collecting plates (33, 33), the interval setting mechanism (34) being capable of setting the interval to become narrower from the upstream side to the downstream side of the flow path (2).

Description

Flow path regulator for hydroelectric power plant

Related application

This application claims the priority of Japanese Patent Application No. 2017-183368 filed on Sep. 25, 2017, which is incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a flow path regulation device for a hydroelectric power unit installed in a water channel or the like.

In general, a hydroelectric generator installed in a water channel or the like converts kinetic energy of water flow into electrical energy, and its output is proportional to the cube of the flow velocity. In addition, among such hydraulic power units, in the case of an axial flow type, that is, a hydraulic power unit in which the rotational axis of the unit and the flow direction of the water are parallel, the output is proportional to the area of the circle created by the rotation of the impeller.

In order to increase the energy conversion efficiency, a hydroelectric power generation system has been proposed which increases the flow velocity near the impeller. For example, as shown in FIG. 18, the hydraulic power generator 110 disclosed in Patent Document 1 is one in which the impeller 113 attached to the gear box 112 supported by the support column 111 rotates in the flow path 2, A casing 120 covering the entire circumference of the impeller 113 is provided. The casing 120 extends along the gearbox 112, and the inner cross-sectional area thereof is configured to increase from the upstream side to the downstream side of the flow passage 2. Here, since the pressure in the casing 120 is lower than the outside, the water on the upstream side of the flow path 2 is drawn into the casing 120 by the casing 120 where the upstream side is narrow and the downstream side is wide, and the impeller 113 is located. The flow velocity at the inlet increases. This is based on the same principle as a known wind speed-up device in a wind turbine. In addition, such a wind speed-up apparatus is a structure which makes the inflow flow velocity increase by generating a vortex on the casing downstream side and making the pressure in the casing lower than the outside.

However, unlike the wind speed-up device in which air is present in the surrounding area, the hydroelectric power generation device 110 can be used only in the water channel 2, and if there is not a sufficient amount of water in the water channel 2, the speed-up effect can not be obtained. Therefore, when the water level in the water channel 2 fluctuates and the water level becomes lower than the upper end of the casing 120, a stable output can not be obtained. Moreover, the casing 120 in the hydraulic power unit 110 of FIG. 18 has a shape (conical shape) in which the cross-sectional area gradually increases from the upstream side to the downstream side, and the outer diameter of the downstream end 120a is growing. On the other hand, since the casing 120 needs to be submerged, the size of the impeller 113 disposed therein near the upstream end 120b of the casing 120 necessarily becomes smaller. As a result, the output obtained for the water channel 2 is reduced.

The hydraulic power unit disclosed in Patent Document 2 increases only the width dimension of its casing from the upstream side to the downstream side, and the height dimension is substantially constant from the upstream side to the downstream side. Therefore, even if the water level is low to a certain degree, the entire casing can be submerged without reducing the size of the impeller.

JP 2014-145347 A JP, 2013-130110, A

However, if the entire casing is not submerged, the effect of accelerating the flow velocity can not be obtained, and therefore, a stable output can not be obtained when the water level fluctuates.

An object of the present invention is to provide a flow path regulating device for a hydroelectric power generator, which can obtain the effect of increasing the flow velocity almost without being affected by the water level in the water channel.

In the flow path regulation device for a hydroelectric power generation device of the present invention, the hydraulic power generation device and the flow path regulation device are installed in a flow path, and the hydraulic power generation device converts a hydraulic power into a rotational force, The flow path regulation device is disposed upstream of the impeller by a predetermined distance of the flow path, and the flow path regulation device is spaced apart from each other in the width direction of the flow path. An interval setting mechanism for setting the distance between the at least two water collection plates and the at least two water collection plates disposed opposite to each other, wherein the distance is narrowed from the upstream side to the downstream side of the flow path And an interval setting mechanism that can be set to

According to this configuration, the space setting mechanism is arranged such that at least two water collecting plates are disposed upstream of the impeller by the predetermined distance of the flow path, and the distance between the at least two water collecting plates is from the upstream side of the flow path As it can be set to be narrower toward the downstream side, water in the flow path can be collected and accelerated toward the impeller. Since the flowing water accelerated by these water collection plates collides with the impeller, the power generation efficiency of the hydroelectric power generation apparatus is improved as compared with the case where the flow path restriction device is not provided. As described above, since the water collecting plate is disposed not on the impeller but on the upstream side of the flow path rather than the impeller, unlike the casing that covers the impeller, the flow velocity is increased as long as the impeller is submerged. An effect is obtained.

The predetermined distance is a distance such that at least two water collecting plates are not separated from the impeller too much and the flow velocity near the impeller can be increased. The predetermined distance is determined according to the size of the flow path, the amount of water, and the like. The predetermined distance indicates, for example, the distance between the location closest to the impeller among at least two water collection plates and the flow path direction between the blade of the impeller and the blade.

The distance between the at least two water collecting plates is preferably larger than the maximum width dimension (outer diameter) of the impeller even at the narrowest downstream side end. Thereby, the water in the flow path collected by the water collection plate can be directed to the entire impeller.

The at least two water collecting plates may be two water collecting plates disposed one each on the left and right sides in the width direction of the flow path. The two water collection plates may be symmetrical with respect to the center of the flow path.

The two water collecting plates may be disposed such that the upstream side ends of the flow passages of the two water collecting plates face each other and abut on the wall surfaces constituting the flow passages. According to this configuration, the flow path passes between the water collection plates almost without passing through the outer side of the water collection plates, that is, between the wall surface and the water collection plate, so that more water can be collected toward the impeller. The power generation can be increased. This configuration is particularly effective when the amount of water flowing through the flow path is small.

The at least two water collecting plates respectively extend in a substantially vertical direction, and the space setting mechanism has at least two water collecting plate adjusting mechanisms respectively corresponding to the at least two water collecting plates, and each water collecting plate The adjustment mechanism may adjust the direction of the corresponding water collection plate to the flow path to any direction, and fix the water collection plate in that direction. According to this configuration, the direction of the water collecting plate with respect to the flow path can be freely changed by each water collecting plate adjusting mechanism. For example, when the amount of water in the flow path is small, the water collection plate can be brought close to the direction perpendicular to the flow path so as to provide greater resistance to the flow, while when the amount of water in the flow path is large, The water collection plate may be brought close to the flow path direction to suppress a situation such as flooding. As described above, since the direction of the water collection plate can be set according to the condition of the water channel where the hydroelectric power generation apparatus is installed, safe and efficient power generation can be performed.

The at least two water collecting plates respectively extend in a substantially vertical direction, and the space setting mechanism has at least two water collecting plate adjusting mechanisms respectively corresponding to the at least two water collecting plates, and each water collecting plate The adjusting mechanism may include a water collecting plate automatic adjusting mechanism that automatically adjusts the direction of the corresponding water collecting plate to the flow passage according to the condition of the flow passage. According to this configuration, the water collecting plate automatic adjusting mechanism of each water collecting plate adjusting mechanism automatically adjusts the direction of the corresponding water collecting plate to the flow passage according to the condition of the flow passage. The orientation of the catchment plate according to the amount of water in the road is set automatically. Therefore, efficient power generation can be performed even without workers around the water channel.

Each of the at least two water collecting plates moves in response to the hydraulic force of the flow passage, whereby the direction of the water collecting plate with respect to the flow passage is changed, and the water collecting plate automatic adjustment mechanism respectively The device may have a reaction force application means which applies a force in a direction opposite to the direction of receiving the hydraulic force to direct the water collection plate. According to this configuration, the movement of the water collection plate in response to the hydraulic pressure changes the direction of the water collection plate with respect to the flow path, but the reaction force adding means applies a reaction force to direct the water collection plate. The orientation of the catchment plate is automatically adjusted to the appropriate direction. In this way, the orientation of the water collection plate according to the above-described flow rate of the flow passage is automatically set. Therefore, safe and efficient power generation is possible even without workers around the water channel. The reaction force application means may be a spring.

Furthermore, it may be provided with guide means for guiding the at least two water collecting plates in the vertical direction. According to this configuration, the height position of the water collection plate can be easily adjusted by the guide means. In addition, the water collection plate can be easily installed in the flow path regulation device. In addition, in order to promote the guidance by the guiding means, the water collecting plate may be provided with an auxiliary means such as a handle grasped by the operator. Further, the spacing setting mechanism may have a mechanism for moving the guiding means, and the spacing of the water collecting plates interlocked with the guiding means may be set by this mechanism.

The upper ends of the at least two water collection plates may be respectively disposed below the upper end of the flow path. According to this configuration, the water flowing above the upper end of the water collection plate is not affected by the water collection plate, but securing the flowing water in this way makes it possible to overflow when the water volume increases. It can be suppressed.

The at least two water collecting plates may each have a uniform thickness. According to this configuration, the water collecting plate can be easily manufactured by the flat plate, and the cost can be reduced.

The cross-sectional shape of each of the two water collecting plates may be a substantially streamlined shape in which the thickness on the upstream side is large and the thickness on the downstream side is small. According to this configuration, it is possible to enhance the speed increasing effect while suppressing the resistance of the water collection plate to the flow of water.

The hydroelectric power generation system of the present invention includes the flow path restriction device for a hydroelectric power generation device and the hydroelectric power generation device. The impeller may be of a propeller type in which the rotation axis of the impeller is parallel to the direction of the flow path.

Any combination of the at least two configurations disclosed in the claims and / or the description and / or the drawings is included in the present invention. In particular, any combination of two or more of the claims is included in the present invention.

The invention will be more clearly understood from the following description of the preferred embodiments with reference to the accompanying drawings. However, the embodiments and the drawings are for the purpose of illustration and description only and are not to be taken as limiting the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same reference numerals in multiple drawings indicate the same or corresponding parts.
FIG. 1 is a perspective view of a hydroelectric power generation system according to a first embodiment of the present invention. It is a front view of the hydraulic power unit in the hydraulic power system of FIG. It is a side view of the hydraulic power unit in the hydraulic power system of FIG. It is sectional drawing along the IV-IV line of the hydraulic power generation system of FIG. It is a sectional view corresponding to Drawing 4, and is a figure for explaining this hydroelectric power system. It is a front view of the hydraulic power system of FIG. FIG. 5 is a cross-sectional view corresponding to FIG. 4 and another view for explaining the hydraulic power generation system. It is the elements on larger scale of the flow-path control apparatus of the hydraulic power generation system of FIG. 7, Comprising: It is a figure in case the amount of water of a flow path is small. It is the elements on larger scale of the flow-path control apparatus of the hydraulic power generation system of FIG. 7, Comprising: It is a figure in case the amount of water of a flow path is large. It is a sectional view corresponding to Drawing 4, and is a sectional view of a hydraulic power system concerning a 2nd embodiment of the present invention. It is the elements on larger scale of the flow-path control apparatus of the hydraulic power generation system of FIG. 9, Comprising: It is a figure in case the amount of water of a flow path is small. It is the elements on larger scale of the flow-path control apparatus of the hydraulic power generation system of FIG. 9, Comprising: It is a figure in case the amount of water of a flow path is large. It is a sectional view corresponding to Drawing 4, and is a sectional view of a hydroelectric system concerning a 3rd embodiment of the present invention. It is a partial front view of the hydraulic power generation system of FIG. 11, Comprising: It is a figure in case the amount of water of a flow path is small. It is a partial front view of the hydraulic power generation system of FIG. 11, Comprising: It is a figure in case the amount of water of a flow path is large. It is a front view of the hydraulic power system concerning a 4th embodiment of the present invention. It is a perspective view of the hydraulic power system of FIG. It is a partial top view of the flow-path control apparatus of the hydraulic power generation system of FIG. 13 and FIG. It is a fragmentary perspective view of the hydraulic power system concerning a 5th embodiment of the present invention. It is an example of flow velocity distribution, and diagram (a) is an example of flow velocity distribution in a hydroelectric power system according to one embodiment of the present invention, and diagram (b) is an example of flow velocity distribution in a conventional hydroelectric power generation system. It is a longitudinal cross-sectional view of the conventional hydraulic power unit.

A hydroelectric system according to each embodiment of the present invention will be described with reference to the drawings. In each of the drawings, for the sake of simplicity, illustration of elements not necessary for the description is appropriately omitted.

<Schematic configuration of the entire hydroelectric power generation system>
1 to 8A and 8B show a hydroelectric power generation system according to a first embodiment. As shown in FIG. 1, the hydroelectric power generation system 1 includes a hydroelectric power generation device 10 and a flow path regulation device 30 for the hydroelectric power generation device. In the present embodiment, the hydraulic power generation device 10 and the flow path regulation device 30 are separate bodies. Therefore, although the hydraulic power generation system 1 is installed in the water channel 2 which has a fixed water flow volume like a water channel, for example, the hydraulic power generator 10 and the flow path regulation device 30 can be installed separately. However, the hydraulic power generation device 10 and the flow path regulation device 30 may be connected and integrally installed. Note that only a portion of the hydroelectric generator 10 is illustrated in FIG. 1 for the sake of simplicity.

<Hydro power generation equipment>
The hydroelectric power generation apparatus 10 is provided with the impeller 13, the electric power generation apparatus main body 14 installed on the water, and the generator stand 15 which supports this electric power generation apparatus main body 14, as the whole is shown in FIG.2 and FIG.3. . The power generator main body 14 includes a generator 19 installed on the generator base 15. The generator base 15 has a beam 16 for the impeller and a support 11 for supporting the impeller 13 on the generator base 15. Both side ends of the beam 16 for a wheel are installed on the upper surface 21 a of the side wall 21 of the water channel 2. The water channel 2 is, for example, an agricultural water channel.

As shown in FIG. 3, the gearbox 12 is connected to the generator base 15 via a support 11. A connection shaft 17 is connected to the inside of the support 11 for connecting the gearbox 12 and the power generator main body 14 to transfer the rotational force of the impeller 13 to the generator 19. As shown in FIG. 2, the impeller 13 is disposed so as to be fully submerged in the flowing water of the water channel 2 and converts the hydraulic power from the flowing water into a rotational force. The impeller 13 is a propeller type in which the rotation axis L1 is parallel to the flow direction F. The impeller 13 has a hub 13a provided at the rotation axis L1 and a plurality of (for example, five) blades 13b extending radially outward from the outer peripheral surface of the hub 13a. As shown in FIG. 3, each blade 13b is formed such that its tip end is slightly inclined toward the upstream side in a winglet shape. As a result, the water resistance is reduced by reducing the tip vortices or moving the generation direction toward the blade tip, and as a result, the power generation torque can be improved. Although a material substantially regarded as a rigid body such as a lightweight metal such as aluminum or a reinforced resin (FRP) reinforced with fibers is used for the impeller 13, for example, a certain amount of deformation such as urethane resin is used. A material that allows for may be used.

<Flow control device>
Referring to FIG. 1, the flow path regulating device 30 faces the beam member 31 for the flow path regulating device at an upstream side of the flow path 2 with respect to the impeller 13 with an interval in the width direction of the flow path 2. And two

water collecting plates

33, 33, and a space setting mechanism 34 for setting a distance between the two

water collecting plates

33, 33. The flow path regulating device beam member 31 is installed on the upper surface 21 a of the side wall 21 of the water channel 2 in parallel to the beam beam 16 (FIG. 2) of the hydraulic power generation device 10. Thus, the flow path regulation device 30 is installed on the upstream side of the flow path 2 than the hydraulic power generation device 10. In the present specification, the term "water channel" is used synonymously with "water channel". However, the term "flow direction" means the flow direction of the water channel.

The gap setting mechanism 34 can be set so that the gap between the

water collecting plates

33 and 33 is narrowed from the upstream side to the downstream side of the flow path 2. The spacing setting mechanism 34 also has at least two water collecting

plate adjusting mechanisms

35, 35 corresponding to the two

water collecting plates

33, 33 respectively. As described later, the direction of the corresponding water collecting plate 33 with respect to the flow path 2 is adjusted to an arbitrary direction by each water collecting plate adjusting mechanism 35, and the water collecting plate 33 is fixed in that direction.

FIG. 4 is a view seen from line IV-IV of FIG. The two

water collecting plates

33, 33 are spaced from each other in the width direction W of the flow path 2 at a predetermined distance upstream of the flow path 2 with respect to the impeller 13 when the flow path regulation device 30 is installed. And arranged in opposition. These

water collecting plates

33, 33 may be made of the same material and the same shape. Each water collecting plate 33 is formed of, for example, a rectangular steel plate having a uniform thickness and extending in the vertical direction. Such a plate can be easily manufactured and cut in cost because it is obtained by cutting a steel material. Alternatively, each water collecting plate 33 may have a substantially streamlined cross-sectional shape such that the thickness on the upstream side is large and the thickness on the downstream side is small. Such a cross-sectional shape can suppress the resistance of the water collection plate 33 to the flow of water.

Returning to FIG. 1, the two water collecting

plate adjusting mechanisms

35, 35 are symmetrically provided on both ends in the extending direction of the elongated flow path control device beam member 31. Each water collecting plate adjusting mechanism 35 is provided with two rod-like first width direction moving rod bodies 35 a placed on the flow path regulating device beam member 31 at intervals in the width direction W of the flow path 2. The first width direction moving rods 35a extend in the horizontal direction, that is, in the flow direction F, in the same manner as the flow path control device beam member 31 at right angles to the flow path control device beam member 31. The first width direction moving rod 35 a is supported by the flow path regulating device beam member 31 and is movable in the width direction W of the flow path 2.

Each water collecting plate adjusting mechanism 35 also includes four rod-like second width direction moving rods 35 b extending in the vertical direction orthogonal to the flow path regulating device beam member 31. Two of the four second widthwise moving rods 35b are respectively spaced in the direction of the channel 2 with the channel restricting device beam member 31 interposed in the same first widthwise moving rod 35a. It is attached with no space. An upper end portion of each second widthwise movement rod 35b is fixed to the first widthwise movement rod 35a by a clamp 37, for example. Therefore, the second widthwise movement rod 35b can be clamped and fixed at any position of the first widthwise movement rod 35a. Of these four second widthwise moving rods 35b, two second widthwise moving rods 35b located on the same side of the flow path regulating device beam member 31, that is, on the upstream or downstream side of the flow path 2. Supports the corresponding water collecting plate 33. Specifically, as shown in FIG. 4, these two second width direction moving rod bodies 35 b are respectively connected to the side ends of one main surface of one water collecting plate 33 by connectors not shown. The mounting angle is variable. Thus, the two water collecting plate support rods 35 b support one water collecting plate 33.

Returning to FIG. 1, each water collecting plate adjustment mechanism 35 further includes two third ones parallel to the first width direction moving rod 35 a, vertically below the two first width direction moving rods 35 a. In the width direction moving rod 35c. Two lower end portions of the second widthwise movement rod 35b are fixed to each of the two third widthwise movement rods 35c by two clamps, for example. Therefore, the second widthwise movement rod 35b can be clamped and fixed at any position of the third widthwise movement rod 35c. In addition, the third width at the fixed position and the lower end with respect to the first widthwise moving bar 35a at the upper end of the second widthwise moving bar 35b so that the second widthwise moving bar 35b extends in the vertical direction The fixed position with respect to the direction moving rod 35c is preferably set on a vertical line. The first to third widthwise moving rods 35a are made of, for example, steel pipes.

FIG. 5 corresponds to FIG. 4, and FIG. 6 is a front view of the hydroelectric power generation system 1, but for simplification, only the components necessary for explanation are shown in these drawings. As shown in FIG. 5 and FIG. 6, the side ends 33a, 33a on the upstream side of the flow path 2 of the two

water collection plates

33, 33 face each other to constitute the flow path 2 (inner wall surface) It may be arranged to abut on each of 21b and 21b. This can be realized only by moving and adjusting the water collecting

plate adjusting mechanisms

35 and 35 with respect to the flow path regulating device beam member 31 after the flow path regulating device beam member 31 of FIG. 1 is installed. That is, the second widthwise moving rod 35b on the side of the side wall surface 21b is in contact with the side wall surface 21b with respect to the beam member 31 for the flow path regulation device (that is, the flow passage 2 of the water collecting plate 33). The side end 33a on the upstream side of the side wall 21a only needs to be moved so as to abut on the side wall surface 21b. During operation, the

water collecting plates

33, 33 come into contact with the side wall surfaces 21b, 21b by receiving power from the outside in the width direction W by hydraulic power, so the position of the water collecting plate adjusting mechanism 35 does not shift.

When the upstream side end 33a of the flow passage 2 of the two

water collection plates

33, 33 abuts on the side wall surfaces 21b, 21b, respectively, the flow passage 2 hardly passes through the outside of the

water collection plates

33, 33 Pass between the

plates

33, 33. For this reason, more water can be collected toward the impeller 13, and the generated power can be increased. This configuration is particularly effective when the amount of water flowing through the flow path 2 is small.

<Operation of the hydroelectric system>
Next, the operation of the hydroelectric power generation system 1 of FIG. 1 will be described.
As described above, in the hydroelectric power generation system 1, the hydroelectric power generation device 10 and the flow path regulation device 30 are installed individually or integrally. However, regardless of whether they are installed individually or integrally, the

water collection plates

33 and 33 of the flow path regulating device 30 are only the predetermined distance of the flow path 2 with respect to the impeller 13 of the hydraulic power generation device 10 It is disposed at the upstream side, at a position where the flow velocity in the vicinity of the impeller 13 can be increased without being separated from the impeller 13 too much.

In the flow path regulating device 30, first, the flow path regulating device beam member 31 is installed on the

upper surfaces

21a and 21a of the

side walls

21 and 21 of the water channel 2, and then the two water collecting

plate adjustment mechanisms

35 and 35 The beam member 31 is provided. The two water collecting

plate adjusting mechanisms

35, 35 may be previously adjusted so that the

water collecting plates

33, 33 have a predetermined direction with respect to the flow path 2. For example, as shown in FIG. 7, the water collecting

plate adjusting mechanism

35, 35 including the

water collecting plates

33, 33 is disposed to the hydraulic power generation device 10 including the impeller 13, and the flow path regulating device 30 is installed. Be done.

Here, as shown in an enlarged manner in FIG. 8A, the water collecting plate 33 is set in a direction close to perpendicular to the flow direction F. That is, the angle θ between the water collecting plate 33 and the flow channel direction F is set to be large. By this setting, when the amount of water in the flow passage 2 is small, the water collection plate 33 works to block the flow passage 2 like a dam to increase the flow velocity of water toward the impeller 13 (FIG. 13). Power generation can be increased. The outer end of the water collecting plate 33 may be extended to be in contact with the side wall surface 21 b. On the other hand, as shown to FIG. 8B, the water collection board 33 can be set to the direction close | similar to the flow-path direction F. As shown to FIG. That is, the angle θ between the water collecting plate 33 and the flow path direction F can be set to be small. With this setting, when the amount of water in the flow path 2 is large, the function of water collection of the water collection plate 33 is reduced to not affect the flow path 2 significantly, and the situation of flooding can be suppressed. The setting of the orientations of the water collecting plate 33, as described above, releases the clamps 37 of FIG. 1 and the first widthwise moving rod 35a and the third widthwise direction of the second widthwise moving rod 35b. This can be realized by adjusting the position with respect to the moving rod 35c and adjusting the positions of the first widthwise moving rod 35a and the third widthwise moving rod 35c with respect to the flow path regulating device beam member 31. After adjusting the position, if the second widthwise moving rod 35b is tightened and fixed again to the first widthwise moving rod 35a and the third widthwise moving rod 35c by the clamp 37, the set water collecting plate The orientation of 33 is fixed.

In the hydraulic power generation device 1 of FIG. 1, the impeller 13 is rotated by hydraulic power in the flow path 2 regardless of the settings of the

water collection plates

33, 33. The rotation of the impeller 13 causes the generator 19 (FIGS. 2 and 3) to generate power. Here, when the

water collecting plates

33, 33 are set to increase the angle θ with the flow channel direction F as shown in FIG. 8A, the flow velocity in the vicinity of the impeller 13 becomes large. The power generated by the generator 19 is larger than when 33 and 33 are absent. On the other hand, when the

water collecting plates

33, 33 are set to have a small angle θ with respect to the flow channel direction F as shown in FIG. Is almost the same. For this reason, if the direction of the

water collection plates

33, 33 is appropriately set according to the amount of water, the generated power that is almost equal when the amount of water is large is always output from the generator 19 (FIG. 2) regardless of the amount of water. Be done.

<Other Embodiments>
In the following description, the portions corresponding to the items described in advance in each embodiment are denoted by the same reference numerals, and the redundant description will be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding embodiment unless otherwise stated. The same configuration produces the same effect. Not only the combination of the portions specifically described in the embodiments but also the embodiments may be partially combined if any problem does not occur in the combination.

A power generation system 1 according to a second embodiment will be described. As shown in FIG. 9, in the present embodiment, the two water collecting

plate adjusting mechanisms

35, 35 respectively have one first width direction moving rod 35a (FIG. 1) and a second width direction moving rod. It is assumed that only two bodies 35b and one third width direction moving rod body 35c are provided. Therefore, each water collection plate 33 is supported at a variable mounting angle by a connector (not shown) on the second widthwise movement rod 35b similarly to the first embodiment, but the inner side Unlike the first embodiment, the side end portion is attached with one end 38 a of a pressing spring (reaction force application means) 38. The other end 38 b of the pressing spring 38 is attached to the spring fixing member 39. Although not shown, the spring fixing member 39 is connected to the flow path regulating device beam member 31. As described above, since the downstream side end 33b of the water collecting plate 33 is only connected to the pressing spring 38, when the hydraulic force of the flow path 2 is received, this portion of the water collecting plate 33 is pressed to the downstream side The water collecting plate is set at a position where it balances with the pressing reaction force of the pressing spring 38. Therefore, if a spring with an appropriate spring constant is used, this pressing spring 38 automatically adjusts the orientation of the water collecting plate 33 in an appropriate direction.

As shown in FIG. 10A, when the amount of water in the flow path 2 is small, the spring 38 is close to a free state because the hydraulic force received by the water collecting plate 33 is small, and the angle θ between the water collecting plate 33 and the flow direction F is growing. On the other hand, as shown in FIG. 10B, when the amount of water in the flow path 2 is large, the water collecting plate 33 receives a large force to compress the spring 38, and the angle θ between the water collecting plate 33 and the flow direction F Becomes smaller.

A power generation system 1 according to a third embodiment will be described. As shown in FIG. 11, in the present embodiment, two second width

direction moving rods

35b and 35b (FIG. 1) of the second width direction moving rods of the water collecting plate adjustment mechanism 35 The water collecting plate 33 is not directly supported, but instead functions as guiding means 35 b A, 35 b A for guiding the water collecting plate 33 in the vertical direction. The guiding means 35bA, 35bA each have a groove 40 extending in the longitudinal direction. Both side ends of the water collecting plate 33 are respectively inserted into the grooves 40. During operation of the hydroelectric power generation system 1 (FIG. 1), the water collection plate 33 hardly moves in the vertical direction because it receives almost no vertical force. The operator manually moves the water collecting plate 33 to move the water collecting plate 33 in the vertical direction. As shown to FIG. 12A, when the water quantity of the flow path 2 is small, the water collection board 33 is positioned below, As shown to FIG. 12B, when the water quantity of the flow path 2 is large, the water collection board 33 is positioned upwards Do. The water collecting plate 33 may be provided with an auxiliary means (not shown) such as a handle gripped by the operator in order to facilitate the guidance by the guiding means 35bA, 35bA.

The flow path regulating device 30 of the power generation system 1 according to this embodiment changes the direction of the water collecting plate 33 according to the amount of water as described in the first embodiment, and also the vertical position of the water collecting plate 33 Since changes can be made simultaneously, more efficient power generation is possible.

The hydraulic power generation system according to the fourth embodiment will be described. As shown in FIG. 13 and FIG. 14, the water collecting plate adjusting mechanism 35 </ b> A adjusts the horizontal angle of the water collecting plate. As shown in FIG. 15, the water collecting plate adjusting mechanism 35A includes a belt 44 wound around the operation means 41, the first pulley 42, the second pulley 43, and the first and second pulleys 43. , A pulley fixing member 45 rotatably supporting the first and second pulleys, and a water collecting plate support member 46 (FIG. 13). The operation means 41 is, for example, a handle operated by an operator, and sets the rotation angle of the first pulley 42. The lower surface of a portion of the pulley fixing member 45 to which the first pulley 42 is attached on the upper surface is fixed to the upper surface 21 a or the like of the side wall 21 of the flow path 2. The other part of the pulley fixing member 45 projects above the flow path 2 (FIG. 13). A second pulley 43 is attached to the upper surface of the overhanging portion of the pulley fixing member 45.

Returning to FIG. 13, each water collecting plate support member 46 is attached at its upper end to the lower portion of the corresponding second pulley 43. Each water collecting plate support member 46 interlocks with the rotation of the second pulley 43.

The flow path regulating device 30 of the hydraulic power generation system 1 according to the present embodiment further includes a flow path installation member 50 as shown in FIG. The flow path installation member 50 has a plate-like first connection piece 51 installed in a direction crossing the flow path 2 on the bottom surface of the flow path 2. The first connection piece 51 rotatably supports the two water collecting plate support members 46 on both end portions thereof and on the rotation axes of the two second pulleys 43.

The flow path installation member 50 also has two second connection pieces 53 and two third connection pieces 55. The second connection pieces 53 extend from both ends of the first connection piece 51 in the direction opposite to the flow direction F, that is, the opposite side to the impeller 13. Each third connection piece 55 is the pulley fixing member 45 of the corresponding water collecting plate adjustment mechanism 35A from the end opposite to the end connected to the first connection piece 51 of the corresponding second connection piece 53. It is attached to the bottom surface. Even if the first connection piece 51, the two

second connection pieces

53, 53, the two

third connection pieces

55, 55, and the two water collecting

plate adjustment mechanisms

35A, 35A are integrally configured and installed, Good. Alternatively, they may be connected to each other when the flow path regulation device 30 is installed. Also, the

third connection pieces

55, 55 can be omitted. However, if there are the third connection pieces 55, the flow path installation member 50 is reinforced in order to connect the corresponding second connection pieces 53 and the corresponding pulley fixing members 45, respectively. The second connection pieces 53 may be fixed to the bottom of the flow path 2 or may be pulled and fixed from the upstream side of the flow path 2 by a chain or the like. When the

second connection pieces

53, 53 are fixed, the first connection piece 51 is stabilized, so that the water collecting

plate supporting members

46, 46 supported by the first connection piece 51 are prevented from being displaced. it can.

The water collecting plate support members 46 respectively hold the water collecting plate 33 so as to extend in the radial direction of the second pulley 43 and in the vertical direction. In the present embodiment, the water collecting plate 33 is fixed to the water collecting plate support member 46 only at one side end thereof and supported in a cantilever manner. The water collecting plate support member 46 may be a guiding means for guiding the water collecting plate 33 in the vertical direction as described in the third embodiment. That is, the water collecting plate support member 46 has a groove (not shown) extending in the longitudinal direction, and one end of the water collecting plate 33 may be inserted into this groove.

In the water collecting plate adjusting mechanism 35A of the flow path regulating device 30 of the hydraulic power generation system 1 according to the present embodiment, the first pulley 42 rotates in accordance with the angle set by the operation through the operation means 41, and the rotation thereof Is transmitted to the second pulley 43 via the belt 44. When the second pulley 43 rotates, the direction of the water collecting plate 33 with respect to the flow path 2 changes. Thus, the direction of the water collecting plate 33 is set in accordance with the angle set by the operation means 41. While the operation means 41 is not operated, the direction of the water collecting plate 33 is fixed. The water collecting plate adjusting mechanism 35A may be provided with a power transmission means including, for example, a worm and a gear, instead of the transmission means including the first pulley 42, the second pulley 43, and the belt 44.

The hydraulic power generation system according to the fifth embodiment will be described. As shown in FIG. 16, the flow path regulating device 30 of the hydraulic power generation system 1 according to this embodiment includes an automatic adjustment device 60 in addition to the components described in the fourth embodiment. The automatic adjustment device 60 executes control processing described below by using two

motors

61 and 61 provided in the second pulley 43, a water level sensor 63 for detecting the water level in the flow path 2, and a processor or the like. And a controller 65. The controller 65 can communicate with the two

motors

61 and 61 and the water level sensor 63 in a wired or wireless manner.

When the water level sensor 63 detects the water level of the flow path 2, it transmits information on the water level to the control device 65. When the control device 65 receives the information on the water level, the control device 65 transmits a command signal to the

motors

61, 61 such that the

water collection plates

33, 33 are oriented in accordance with the water level. Each motor 61 rotationally drives the corresponding second pulley 43 in accordance with the received command signal. Thus, the orientations of the

water collecting plates

33, 33 are adjusted. Specifically, in response to the command signal from the control device 65, each motor 61 has the water collecting plate 33 in a direction close to the vertical direction of the flow direction F when the water level in the flow passage 2 is low. As described above, the water collecting plate 33 is automatically adjusted, and when the water level of the flow path 2 is high, the water collecting plate 33 is automatically adjusted so as to be close to the flow direction F. The controller 65 may transmit the command signal to the

motors

61, 61 only when the water level changes more than a predetermined range.

The relationship between the water level of the flow path 2 and the direction (horizontal direction angle) of the water collection plate appropriate for the water level is determined in advance and stored in the control device 65. In this relationship, for example, the controller 65 stores, as a table, the orientation of the water collecting plate with respect to each of the discrete values of the water level. When the controller 65 receives information on the water level from the water level sensor 63, the controller 65 refers to the table to extract an appropriate direction of the water collecting plate, and transmits a command signal to the

motors

61, 61.

The water level sensor 63 may be a non-contact type water level sensor such as a laser sensor as illustrated, but any sensor that can detect the water level may be used. The water level sensor 63 is not required to have high accuracy.

In the present embodiment, the operation means 41, the first pulley 42 and the belt 44 are illustrated, but the water collecting plate adjustment mechanism 35A may not have these. In this case, adjustment of the

water collecting plates

33, 33 is always performed automatically. On the other hand, in the illustrated example, the

water collecting plates

33, 33 can be adjusted both automatically and manually.

<Example of flow velocity distribution>
An example of the flow velocity distribution in the case where the hydraulic power generation system 1 is provided with the flow path regulation device 30 as described in each embodiment and the case where the hydraulic power generation system 1 is not provided with the flow path regulation device 30 is illustrated in FIG. It shows in (a) and (b) respectively.

As apparent from the diagram (a) of FIG. 17, the flow velocity in the vicinity of the tip of the impeller 13 is high. This is because water is collected at the center of the flow path 2 by the

water collection plates

33, 33. On the other hand, as shown in the diagram (b) of FIG. 17, when there is no

water collecting plate

33, 33, the flow velocity near the tip of the impeller 13 is slower compared to the diagram (a) of FIG. I understand.

As described above, although the preferred embodiments have been described with reference to the drawings, various additions, modifications or deletions can be made without departing from the spirit of the present invention. Therefore, such is also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Hydroelectric power system 2 ... Flow path 10 ... Hydroelectric power apparatus 13 ... Spur 19 ... Generator 30 ... Flow control apparatus 33 ... Water collecting board 34 ... Spacing mechanism 35 ... Water collecting board adjustment mechanism

Claims

A flow path regulation device for a hydroelectric power generation device, wherein the hydroelectric power generation device and the flow path regulation device are installed in a flow path, and the hydroelectric power generation device converts hydraulic power to rotational power, and the impeller The flow path regulation device is provided with a generator that generates electric power by rotation of
At least two water collecting plates disposed upstream of the flow channel by a predetermined distance with respect to the impeller, and disposed to face each other at an interval in the width direction of the flow channel;
A hydroelectric power generation system comprising: a space setting mechanism for setting the space between the at least two water collection plates, wherein the space can be set so as to narrow the space from the upstream side to the downstream side of the flow path Device flow control device.
In the flow control device for a hydroelectric power generation device according to claim 1,
A flow passage regulation device for a hydroelectric power generation device, wherein the at least two water collection plates are two water collection plates disposed one each on the left and right sides in the width direction of the flow passage.
In the flow control device for a hydroelectric power generation device according to claim 2,
The flow for a hydroelectric power generation apparatus in which the two water collecting plates are disposed such that the upstream side ends of the flow passages of the two water collecting plates face each other and abut on the wall surfaces constituting the flow passages. Road regulation device.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 3.
Each of the at least two water collecting plates extends in a substantially vertical direction;
The space setting mechanism has at least two water collecting plate adjusting mechanisms respectively corresponding to the at least two water collecting plates, and each water collecting plate adjusting mechanism makes the direction of the corresponding water collecting plate to the flow path arbitrary. The flow path regulation device for a hydroelectric power generation device, wherein the water collection plate is fixed in the direction of and fixed to the direction.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 4.
Each of the at least two water collecting plates extends in a substantially vertical direction;
The interval setting mechanism has at least two water collecting plate adjusting mechanisms respectively corresponding to the at least two water collecting plates, and each water collecting plate adjusting mechanism corresponds to the corresponding water collection according to the condition of the flow path. A flow path regulation device for a hydroelectric power generator, including a water collection plate automatic adjustment mechanism that automatically adjusts the direction of the plate with respect to the flow path.
In the flow control device for a hydroelectric power generation device according to claim 5,
Each of the at least two water collecting plates moves in response to the hydraulic force of the flow passage, whereby the direction of the water collecting plate with respect to the flow passage is changed, and the water collecting plate automatic adjustment mechanism respectively A flow path regulation device for a hydroelectric power generation device, comprising: a reaction force application unit that applies a force in a direction opposite to the direction in which the hydraulic power is received to direct the water collection plate.
In the flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 6, further,
A flow path regulating device for a hydroelectric power generator, comprising guiding means for guiding the at least two water collecting plates in the vertical direction.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 7.
A flow path regulation device for a hydroelectric power generation device installed so that upper ends of the at least two water collection plates are respectively positioned lower than an upper end of the flow path.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 8.
A flow path regulation device for a hydroelectric power generator, wherein each of the at least two water collection plates has a uniform thickness.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 8.
The flow path regulation device for a hydroelectric power generation device, in which each of the two water collecting plates has a substantially streamlined cross-sectional shape having a large thickness on the upstream side and a small thickness on the downstream side.
The flow path regulation device for a hydroelectric power generation device according to any one of claims 1 to 10,
A hydroelectric power generation system comprising the hydroelectric power generation device.
The hydraulic power generation system according to claim 11, wherein the impeller is a propeller type in which a rotation axis of the impeller is parallel to a direction of the flow path.