JP2009235951A - Vertical shaft valve type hydraulic turbine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit formation of air sucking swirl in a shaft valve type hydraulic turbine generator. <P>SOLUTION: The vertical shaft valve type hydraulic turbine generator includes a hydraulic turbine arranged to orient a rotary shaft to a vertical direction, and a generator 2 connected to the hydraulic turbine and driven by the hydraulic turbine. The generator further includes a horizontal channel 80 formed to form free water surface 20 and to make water roughly horizontally flow toward an upper part of the hydraulic turbine, and a vertical direction channel 70 formed to extend downward toward the generator 2 from a vertical direction water supply port 71 formed on a bottom part of the horizontal channel 80 and to make water flowing through the horizontal channel 80 flow downward toward the hydraulic turbine. The generator even further includes an elbow type duct 10 formed to extend while bending upward from the vertical direction water supply port 71, to be connected to the horizontal channel 80 at an upstream side of the vertical direction water supply port 71, and to increase in cross section to a water flow direction as it goes from a downstream side to an upstream side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vertical shaft type water turbine power generation facility that takes water flowing in a horizontal flow channel into a vertical flow channel and supplies the water to a water turbine.

  A Kaplan turbine is a type of turbine that uses propeller-shaped blades to rotate the turbine, and the guide vanes that are installed together are movable so that it can be operated with high efficiency against changes in the flow rate of fluid passing through the turbine. Vertical shaft type hydroelectric power generation equipment, which is a kind of power generation equipment using the Kaplan turbine, is often applied for a relatively low head.

For this reason, the vertical distance from the upper surface of the horizontal flow path above the water turbine to the inlet of the vertical flow path is shorter than that of a Francis turbine or the like. Similarly, the amount of water flowing in the water wheel is relatively large.
JP 2005-163563 A JP 2007-120461 A

  For example, as disclosed in Patent Document 1, when operating an upright valve type hydroelectric power generation facility, a rope-shaped vortex flow having a strong swirl velocity component called an air suction vortex from the water surface of the horizontal channel toward the water turbine May occur locally.

  This vortex (air suction vortex) is generated when water is suddenly sucked into the water turbine channel by the operation of the water turbine, but continuously generated from the water surface to the water turbine. For this reason, a large hydraulic energy loss due to this vortex occurs in the water turbine, and the vortex collides with the water turbine to generate vibration and noise, which may hinder the operation of main equipment such as the water turbine. become.

  In general, this air suction vortex is closely related to the shape of the flow path through which water flows, and the non-uniformity of the horizontal flow speed in the horizontal flow path develops a swirl flow and grows as a vortex flow. is there. In addition, this air suction vortex is deeply related to the uniformity of the flow pattern in the flow path, and it is known that the vortex does not occur when the flow pattern in the flow path is uniform and not disturbed. .

  However, it is often difficult to make the flow pattern in the horizontal flow path uniform due to limitations in civil engineering work and problems in construction, etc., which makes it easy to generate air suction vortices. Yes.

  When the vertical flow path is formed in the vertical direction below the horizontal flow path with an opening (water supply port) at the bottom end of the horizontal flow path, as in the case of a vertical valve type hydroelectric power station, the direction of water flow Is changed from the horizontal direction to the vertically downward direction, a downward flow is generated at the end of the horizontal flow path. Therefore, the vortex generated on the water surface may be easily extended downward. At this time, as the water level in the horizontal flow path becomes lower and the amount of water in the water turbine increases, the vortex strength increases and air vortex is generated, so that air is sucked continuously or intermittently toward the water supply port of the vertical flow path. Become.

  Occurrence of this air suction vortex may cause fluctuations in the operation state of the water turbine due to air flowing into the water turbine, which may hinder the operation of equipment such as the main turbine. In addition, a large energy loss occurs in the water turbine.

  As a method for avoiding such air suction vortex, for example, as disclosed in Japanese Patent Application Laid-Open No. H10-260707, a clean flow rod having one end fixedly supported on the upper surface portion of the generator valve and the other end protruding into the water channel is used. It is known that the water flow becomes a flow having a gentle swirl around the clear flow rod, and the local vortex flow hardly occurs.

  However, with this method, when a vortex is generated and the rod is steadily gathered around the rod, the vortex will cause the round bar to vibrate due to the excitation force, which may be undesirable for the soundness of the structure. It is done.

  Moreover, as disclosed in Patent Document 2, the generation of vortices is suppressed by arranging a horizontal rectifying plate so as to be substantially horizontal near the water surface of the water inlet for taking water from the horizontal flow path. Etc. are known.

  In general-purpose pumps, as a means for avoiding the above-mentioned air suction vortex, optimization of the shape of the suction pipe and a suction device for suppressing swirl flow have been considered. Has not been put to practical use.

  As described above, in the vertical shaft type water turbine power generation facility, a vortex flow due to air suction is generated toward the water turbine on the water surface forming the water channel of the water turbine. When this air suction vortex reaches the water turbine, hydraulic energy loss increases and the turbine performance decreases. Even if it is possible to drive, a decrease in turbine performance is inevitable.

  Since this water turbine is applied to the low head region, even a relatively small loss becomes a large one that cannot be ignored from the viewpoint of the water turbine loss expressed as a ratio to the effective head. Further, when the eddy current collides with and comes into contact with the water turbine, a phenomenon that disturbs the operation of the water turbine such as noise and vibration occurs.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to suppress the generation of air suction vortices in a vertical shaft type water turbine power generation facility.

  In order to achieve the above object, an upright valve type water turbine power generation facility according to the present invention includes a water turbine arranged such that a rotating shaft faces a vertical direction, a generator connected to the water turbine and driven by the water turbine, A horizontal flow path formed so that water flows substantially horizontally toward the upper side of the water wheel with a free water surface, and an opening formed at the bottom of the horizontal flow path downward toward the generator A longitudinal flow path formed such that the water flowing through the horizontal flow path flows downward toward the water wheel, and toward the horizontal flow path upstream of the opening from the opening. And an elbow duct that is connected while extending while being curved so that the cross-sectional area with respect to the water flow direction increases smoothly from the downstream side to the upstream side.

  Further, the vertical shaft type water turbine power generation equipment according to the present invention includes a water turbine arranged so that a rotating shaft faces a vertical direction, a generator connected to the water turbine and driven by the water turbine, and a free water surface. A horizontal flow path formed so that water flows substantially horizontally toward the upper side of the water turbine, and an opening formed in a bottom portion of the horizontal flow path that extends downward toward the generator, and A vertical flow channel formed such that water flowing through the flow channel flows downward toward the water turbine, and an upstream side in the horizontal flow channel from above the opening while maintaining the same width as the horizontal flow channel And a vertical plate fixed to the bottom end of the horizontal flow path downstream of the opening and the downstream end of the top plate. And a water flow adjusting cover.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress generation | occurrence | production of the air suction vortex in a vertical shaft type | mold water turbine power generation equipment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vertical shaft type water turbine power generation facility according to the present invention will be described with reference to the drawings.

[First Embodiment]
First, the configuration and operation of the first embodiment according to the vertical shaft type water turbine power generation facility of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic plan view showing a first embodiment of an upright valve type water turbine power generation facility according to the present invention. FIG. 2 is a schematic sectional side view of FIG.

  As shown in FIGS. 1 and 2, a free water surface 20 is formed in a horizontal flow path 80 through which water flows in a horizontal direction, and a vertical flow path 70 extending downward is formed at the bottom of the horizontal flow path 80. ing. Below the vertical flow path 70, a turbine generator 21 having a main shaft 3 extending vertically is disposed.

  The vertical shaft type water turbine power generation equipment of this embodiment has an egg-shaped valve 1, and a generator 2 having a generator stator and a rotor as main components is disposed in the valve 1. The main shaft 3 is arranged in the vertical direction, a rotor is coupled to the upper end portion of the main shaft 3, and a runner 4 is attached to the lower end portion.

  Above the runner 4, a plurality of guide vanes 5 for adjusting the flow rate are circumferentially arranged, and the plurality of guide vanes 5 are formed so as to be linked by a link mechanism or the like located on the outer peripheral portion thereof. ing.

  On the upper side (upstream side) of the guide vane 5, support members called stays 6 for supporting the valve 1 are arranged radially from the valve 1 toward the outside of the longitudinal flow path 70. In addition, inspection ports 8 for inspecting the inside of the generator 2 are arranged above and below the valve 1, respectively.

  A substantially circular opening that guides water to the longitudinal channel 70 is formed at the bottom of the horizontal channel 80. In the present embodiment, this opening is referred to as a vertical water supply port 71. The elbow duct 10 is connected to the vertical water supply port 71. The elbow duct 10 is formed so as to connect the longitudinal flow path 70 and the horizontal flow path 80.

  This elbow-type duct 10 includes a longitudinal flow path connection portion 72 connected to the longitudinal water supply port 71, a curved portion 73 that changes the flow of water from the horizontal direction to the vertical downward direction, and a rectangular horizontal water supply port 74 that takes in water. The horizontal flow path connection part 75 in which is formed.

  The front opening of the horizontal water supply port 74 is formed by at least two side plates 76 and a top plate 77. The side plate 76 is disposed so that the width of the frontage is substantially the same as the width of the horizontal flow path 80. The height of the top plate 77 is slightly lower than the lowest water level that the free water surface 20 in the horizontal flow path 80 can take as a power plant. That is, there is no water surface in contact with the outside air on the downstream side of the horizontal water supply port 74.

  The elbow-type duct 10 is formed so that the cross-sectional area with respect to the water flow direction becomes gradually smaller toward the downstream side from the horizontal water supply port 74. That is, the elbow-type duct 10 is connected to the vertical water supply port 71 from the horizontal water supply port 74 via the horizontal flow channel connection portion 75, the curved portion 73, and the vertical flow channel connection portion 72 on the downstream side of the horizontal water supply port 74. The cross-sectional area with respect to the water flow direction is gradually reduced. These are connected by a smooth curved surface so that there is no sudden change in the cross-sectional area.

  The direction of water flow during water turbine operation is indicated by an arrow 50 in the figure. When the water turbine is operated, the water flowing from the upstream side of the horizontal flow path 80 flows in from the horizontal water supply port 74 of the elbow-type duct 10, gradually increases the flow velocity, and from the horizontal direction at the curved portion 73. The flow direction is gradually changed downward in the vertical direction, and then flows into the vertical flow path 70.

  The water that has flowed into the vertical flow path 70 formed at the bottom of the horizontal flow path 80 flows downward through the annular portion surrounding the valve 1 at the center of the vertical flow path 70, and is guided by the guide vanes 5. Rectified and led to the runner 4. The water that has worked in the runner 4 flows out to the suction pipe located downstream thereof, and is guided to a lower pond (not shown) or the like.

  The curved surface 73 of the elbow duct 10 has no water surface that becomes a boundary with the outside air. That is, since the curved portion 73 is isolated from the free water surface 20 of the horizontal flow path 80, the generation of air suction vortex generated by sucking air is suppressed.

  Further, the retained water 82 at the end of the horizontal flow path 81 outside the elbow duct 10 is isolated from the vertical flow path 70 by the elbow duct 10. Therefore, air is not sucked from the free water surface 20 formed by the staying water 82 and flows into the water wheel.

  Since the inner wall of the curved portion 73 of the elbow-type duct 10 is formed so as to draw a smooth curve, the hydraulic energy loss of the water flow caused by the elbow-type duct 10 can be kept low. Therefore, compared with the case where the elbow type duct 10 is not arranged, the vertical shaft type water turbine power generation facility of the present embodiment can suppress a decrease in the head acting on the water turbine.

  Therefore, it is possible to efficiently operate the water turbine while suppressing energy loss.

[Second Embodiment]
A second embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the first embodiment, and the same or similar parts as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 3 is a schematic plan view showing a second embodiment of the vertical shaft type water turbine power generation facility according to the present invention. FIG. 4 is a schematic sectional side view of FIG.

  As shown in FIGS. 3 and 4, a movable plate 12 is attached to the outer upper part of the front opening of the horizontal water supply port 74 of the elbow duct 10 of the present embodiment. The movable plate 12 has a rectangular shape as a whole, and one side on the longitudinal side of the movable plate 12 is rotated around a horizontal rotation shaft 12 a on one side of a top plate 77 that forms an opening of the horizontal water supply port 74. It is mounted movably.

  The width (longitudinal side) of the movable plate 12 is formed to be the same as the width of the top plate 77. The length (short side) of the movable plate 12 in the water flow direction is desirably formed to be at least smaller than the length from the top plate 77 to the bottom of the horizontal flow path 80.

  The water level of the horizontal flow path 80 of the power plant changes depending on the natural environment such as the weather at the place where the power plant is installed, the driving state of the water turbine, and the like. On the other hand, the height of the top plate 77 of the horizontal water supply port 74 of the elbow-type duct 10 is fixed so as to be located in the vicinity of the lowest water level, as in the first embodiment.

  When the water level rises above the predetermined water level, the elbow duct 10 as a whole may be submerged, and air may be sucked from the water surface above the horizontal water supply port 74 to generate an air suction vortex.

  In general, the horizontal flow component of the water flow is dominant in the water flow at the horizontal water supply port 74, and the vertical downward component (downward component) is considered to be small. However, when the water level rises to the maximum water level, the state of the flow near the water surface may be a case where a downflow occurs and the air suction vortex flows into the elbow duct 10.

  When the water level rises, the position of the movable plate 12 is adjusted so that the position of the side 12b at the tip of the movable plate 12 facing the horizontal rotation shaft 12a is always above the free water surface 20 in accordance with the rise in the water level. Turn to adjust.

  At this time, the water flowing through the horizontal flow path 80 flows into the horizontal water supply port 74 along the surface of the movable plate 12 that receives the water flow of the horizontal flow path 80. Therefore, it is possible to suppress the generation of a descending flow having a high flow velocity such that an air suction vortex is generated.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the first embodiment, an air suction vortex is generated even when the water level of the horizontal flow path 80 rises to the vicinity of the highest water level. Such a downward flow can be suppressed.

[Third Embodiment]
A third embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the second embodiment, and the same or similar parts as those of the second embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 5 is a schematic plan view showing a third embodiment of the vertical shaft type water turbine power generation facility according to the present invention. FIG. 6 is a schematic sectional side view of FIG.

  In the present embodiment, as in the second embodiment, an actuator 13 that performs an expansion / contraction operation is attached to the movable plate 12 attached to the top plate 77 so as to assist the rotation operation. The actuator 13 is, for example, in the shape of a long cylinder and is configured to be driven to extend and contract in the longitudinal direction.

  As shown in FIGS. 5 and 6, a mounting base 60 for installing the actuator 13 is disposed outside (land) of the horizontal flow path 80. A jig 61 or the like is arranged on the mounting base 60, and the actuator 13 is attached to the jig 61 at one end of the actuator.

  The other end of the actuator 13 is attached to the upper surface of the movable plate 12, that is, the surface opposite to the surface that receives the water flow of the horizontal flow path 80.

  For example, the actuator 13 is driven in a contracting direction by an external control device (not shown) or the like. With this operation, the angle formed by the movable plate 12 and the free water surface 20 of the horizontal flow path 80 on the upstream side of the movable plate 12 so that the position of the side 12b at the front end facing the horizontal rotation shaft 12a becomes upward. The movable plate 12 is rotated so that becomes larger.

  When the water level in the horizontal flow path 80 rises, the movable plate 12 is rotated by driving the actuator 13 in a contracting direction so that the angle increases in accordance with the rise in the water level. Conversely, when the water level of the horizontal flow path 80 becomes low, the movable plate 12 is rotated by driving the actuator 13 in the extending direction so that the angle becomes small.

  As is apparent from the above description, according to this embodiment, in addition to the effects of the first and second embodiments, the movable plate 12 can be rotated according to the water level of the horizontal flow path 80. It becomes possible.

  Further, according to the present embodiment, for example, a device for monitoring the water level of the horizontal flow path 80 can be installed, and the state (posture) of the movable plate 12 can be automatically controlled based on the information of the device. is there.

[Fourth Embodiment]
A fourth embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the second embodiment, and the same or similar parts as those of the second embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 7 is a schematic plan view showing a fourth embodiment of the vertical shaft type water turbine power generation facility according to the present invention. FIG. 8 is a schematic sectional side view of FIG.

  As shown in FIGS. 7 and 8, in this embodiment, a hollow floating body movable plate 14 having a cavity formed therein is attached instead of the movable plate 12 of the second and third embodiments. The mounting method and appearance of the floating movable plate 14 are the same as those of the movable plate 12 of the second and third embodiments. The floating movable plate 14 is formed so as to always float in water by a cavity formed therein.

  In addition, when the horizontal flow velocity of the horizontal flow path 80 is large, a stopper or the like may be provided at a limit position where the horizontal flow path 80 can rotate. Further, the actuator 13 of the third embodiment may be attached to the floating body movable plate 14.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the first and second embodiments, the position of the side 12b of the tip facing the horizontal rotation shaft 12a of the floating movable plate 14 is Since it is always above the free water surface 20, the control of the state of the floating movable plate 14 accompanying the increase or decrease of the water level becomes easy.

[Fifth Embodiment]
A fifth embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the first embodiment, and the same or similar parts as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 9 is a schematic plan view showing a fifth embodiment of the vertical shaft type water turbine power generation facility according to the present invention. FIG. 10 is a schematic sectional side view of FIG.

  In the present embodiment, the rectifying device 15 is disposed inside the curved portion 73 of the elbow duct 10 and above the vertical water supply port 71.

  The rectifier 15 of the present embodiment includes two curved plates formed by curving a flat plate and having different radii of curvature, that is, a first curved plate 51 and a second curved plate 52. In this example, the curvature radius of the second curved plate 52 is formed to be larger than the curvature radius of the first curved plate 51.

  In the curved portion 73, the horizontal flow path 80 and the vertical flow path 70 are connected by a smooth curved surface, and the inside of the curved portion 73, that is, a portion having a small curvature radius (curvature radius small portion 73a) and a large curvature radius. Part (curvature radius large part 73b).

  As shown in FIGS. 9 and 10, the rectifier 15 of the present embodiment, that is, the first and second curved plates 51 and 52 are arranged on the first curved plate 51 and the large curvature radius portion 73 b side on the small curvature radius portion 73 a side. The second curved plate 52 is disposed on the inner curved surface so as to receive the water flow of the horizontal flow path 80 on the curved inner surface. Therefore, the curvature radius is configured to increase in the order of the small curvature radius portion 73a, the first curved plate 51, the second curved plate 52, and the large curvature radius portion 73b.

  Since the water flowing through the elbow duct 10 flows while changing its direction from the horizontal direction to the vertical downward direction, a secondary flow may be generated by the centrifugal force acting on the fluid (water) as it is. This secondary flow may cause hydraulic energy loss. By arranging the rectifier 15 of the present embodiment, it is possible to suppress the generation of this secondary flow.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the first embodiment, it is possible to suppress the secondary flow in the elbow duct 10 by providing the rectifier 15. Become. Therefore, hydraulic energy loss can be further suppressed as compared with the first embodiment.

[Sixth Embodiment]
A sixth embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the first embodiment, and the same or similar parts as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 11 is a schematic plan view showing a sixth embodiment of the vertical axis valve-type water turbine power generation facility according to the present invention. 12 is a schematic sectional side view of FIG. FIG. 13 is a schematic perspective view showing a part of the lattice top plate 91 of FIG. 14 is a partial cross-sectional view of FIG.

  Instead of the elbow-type duct 10 of the first embodiment, a water flow adjusting cover 11 having a lattice 94 is arranged. The water flow adjusting cover 11 includes a lattice top plate 91 on which a lattice 94 is formed, a vertical plate 92 that is attached to the downstream end of the lattice top plate 91 and arranged substantially vertically, the lattice top plate 91 and the vertical plate There are two side plates 76 that cover the plate 92 from the channel width direction. In FIG. 11, the lattice 94 is not shown.

  The lattice top plate 91 is formed to extend horizontally from the upper side of the vertical water supply port 71 to the upstream side of the horizontal flow path 80. A horizontal water supply port 74 is formed at the upstream end of the lattice top plate 91 by the lattice top plate 91 and the two side plates 76. The width and height of the horizontal water supply port 74 are the same as those in the first embodiment. It is formed similarly to the form. That is, the width is formed to be the same length as the width of the horizontal flow path 80, and the height is set so that the free water surface 20 in the horizontal flow path 80 is slightly lower than the lowest water level that can be taken as a power plant. A top plate 91 is disposed and formed.

  In addition, this horizontal water supply port 74 may be formed by the flow path wall formed in the bank on the both sides of the grid top plate 91 and the horizontal flow path 80, without using the two side plates 76.

  Further, the length of the lattice top plate 91 in the horizontal water flow direction is desirably a length that allows the water to flow in the horizontal direction until the flow of water flowing in from the horizontal water supply port 74 is stabilized.

  For example, as shown in FIGS. 13 and 14, a plurality of rectangular long plates 95 extending in the width direction of the horizontal flow path 80 are equal to each other in the water flow direction of the horizontal flow path 80. It is formed so as to be spaced apart.

  The rectangular surfaces of these long plates 95 that receive the horizontal water flow are inclined so that the long side on the downstream side of the horizontal flow path 80 is downward. That is, the lower long side 95b of the rectangular surface that receives the horizontal water flow is inclined so as to be downstream of the upper long side 95a.

  The direction of water flow during water turbine operation is indicated by an arrow 50 in the figure. When the water turbine is operated, the water flowing from the upstream side of the horizontal flow path 80 flows into the horizontal water supply port 74 of the water flow adjusting cover 11. For a while, it circulates in the horizontal direction while filling the interior of the water flow adjusting cover 11. In the vicinity of the vertical water supply port 71, the direction changes vertically downward and flows into the vertical flow path 70.

  Even when a downward flow having a swirl speed by sucking air on the water surface above the vertical water supply port 71, that is, when an air suction vortex is generated, the lattice top plate 91 has a predetermined inclination with respect to the downward flow. Therefore, the air suction vortex can be prevented from reaching the water turbine directly. That is, the lattice top plate 91 itself has a function as a rectifier, for example.

  Further, the stagnant water 82 at the end of the horizontal flow path 81 located outside the water flow adjusting cover 11 is isolated from the vertical water supply port 71 by the vertical plate 92 of the water flow adjusting cover 11, so The influence of water flow is suppressed.

  Therefore, it is possible to efficiently operate the water turbine while suppressing energy loss.

[Seventh Embodiment]
A seventh embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. This embodiment is an example in which the features of the second embodiment are combined with the features of the sixth embodiment. Parts that are the same as or similar to those in the second and sixth embodiments are assigned the same reference numerals, and redundant descriptions are omitted. FIG. 15 is a schematic plan view showing a seventh embodiment of the vertical shaft type water turbine power generation facility according to the present invention. FIG. 16 is a schematic sectional side view of FIG.

  As shown in FIGS. 15 and 16, in this embodiment, the movable plate 12 is rotatably attached to the upper side of the horizontal water supply port 74 of the lattice top plate 91 as in the second embodiment.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the sixth embodiment, the air suction vortex is generated even when the water level of the horizontal flow path 80 rises to the vicinity of the highest water level. It is possible to suppress the occurrence of such downward flow.

[Eighth Embodiment]
The eighth embodiment of the vertical valve type water turbine power generation facility according to the present invention will be described below. This embodiment is a modification of the seventh embodiment, and the same or similar parts as those of the seventh embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 17 is a schematic plan view showing an eighth embodiment of the vertical shaft type water turbine power generation facility according to the present invention. 18 is a schematic sectional side view of FIG.

  As shown in FIGS. 17 and 18, in the present embodiment, the actuator 13 that performs an expansion / contraction operation on the movable plate 12 attached to the lattice top plate 91 as in the seventh embodiment, as in the third embodiment. And is configured to perform a rotation operation.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the sixth and seventh embodiments, the rotating operation of the movable plate 12 is automatically performed according to the water level of the horizontal flow path 80. Can be done.

[Ninth Embodiment]
A ninth embodiment of the vertical shaft type water turbine power generation facility according to the present invention will be described below. In this embodiment, the features of the fourth embodiment are combined with the features of the sixth embodiment. Parts that are the same as or similar to those in the fourth and sixth embodiments are assigned the same reference numerals, and redundant descriptions are omitted. FIG. 19 is a schematic plan view showing a ninth embodiment of the vertical axis valve-type water turbine power generation facility according to the present invention. 20 is a schematic sectional side view of FIG.

  As shown in FIGS. 19 and 20, in this embodiment, a floating movable plate 14 similar to that of the fourth embodiment is attached instead of the movable plate 12 of the seventh and eighth embodiments. The mounting method and configuration of the floating movable plate 14 are the same as those of the floating movable plate 14 of the fourth embodiment.

  In addition, when the horizontal flow velocity of the horizontal flow path 80 is large, a stopper or the like may be provided at a limit position where the horizontal flow path 80 can rotate. The actuators 13 of the third and eighth embodiments may be attached to the floating body movable plate 14.

  As is apparent from the above description, according to the present embodiment, in addition to the effects of the seventh and eighth embodiments, the position of the side 12b of the tip facing the horizontal rotation shaft 12a of the floating movable plate 14 is Since it is always above the free water surface 20, the control of the state of the floating movable plate 14 accompanying the increase or decrease of the water level becomes easy.

[Tenth embodiment]
A tenth embodiment of an upright valve type water turbine power generation facility according to the present invention will be described below. This embodiment is an example in which the features of the fifth embodiment are combined with the features of the sixth embodiment. Parts that are the same as or similar to those in the fifth and sixth embodiments are assigned the same reference numerals, and redundant descriptions are omitted. FIG. 21 is a schematic plan view showing a tenth embodiment of the vertical axis valve-type water turbine power generation facility according to the present invention. 22 is a schematic sectional side view of FIG.

  As shown in FIGS. 21 and 22, in this embodiment, the rectifier 15 is arranged above the vertical water supply port 71 inside the water flow adjusting cover 11.

  The rectifier 15 of the present embodiment has three curved plates formed by bending a flat plate, that is, a first curved plate 51, a second curved plate 52, and a third curved plate 53. These curved plates may be fixed by, for example, a support plate 54 that extends in the vertical direction and the water flow direction of the horizontal flow path 80 and is disposed above the vertical water supply port 71. Further, these curved plates are formed so as to have different curvature radii, and the first curved plate 51, the second curved plate 52, and the third curved plate 53 are formed so that the curvature radii become larger in this order.

  The first to third curved plates 51, 52, and 53 are located above the longitudinal water supply port 71 from the upstream side of the horizontal flow path 80, and are connected to the first curved plate 51, the second curved plate 52, and the third curved plate 53. Arranged in order. It arrange | positions so that the water flow of the horizontal flow path 80 may be received by the curved inner surface.

  The water flowing through the water flow adjusting cover 11 becomes a downward water flow by the vertical plate 92, but an unstable flow may be generated as it is. By arranging the rectifier 15 of the present embodiment, it is possible to further suppress the disturbance of the water flow inside the water flow adjustment cover 11.

  Therefore, hydraulic energy loss can be further suppressed as compared with the sixth embodiment.

[Other Embodiments]
The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  The width of the horizontal water supply port 74 of the elbow duct 10 or the water flow adjusting cover 11 is the same as the width of the horizontal flow path 80, but it is not necessarily the same depending on the water channel, depending on the installation environment of the power plant Just decide.

  Further, the actuator 13 of the third and eighth embodiments is not limited to the expansion / contraction type. For example, it is possible to rotate the movable plate 12 using a bending type.

  Further, the grid 94 formed on the grid top plate 91 of the water flow adjusting cover 11 is not limited to the one shown in FIGS. 13 and 14 as long as it has a predetermined inclination with respect to the water flow direction.

1 is a schematic plan view showing a first embodiment of a vertical shaft type water turbine power generation facility according to the present invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 2nd Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. FIG. 4 is a schematic sectional side view of FIG. 3. It is a schematic plan view which shows 3rd Embodiment of the vertical axis | shaft valve type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 4th Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 5th Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. FIG. 10 is a schematic sectional side view of FIG. 9. It is a schematic plan view which shows 6th Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is the schematic perspective view which showed a part of lattice top plate of FIG. It is a fragmentary sectional view of FIG. It is a schematic plan view which shows 7th Embodiment of the vertical axis | shaft valve type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 8th Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 9th Embodiment of the vertical axis | shaft valve-type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG. It is a schematic plan view which shows 10th Embodiment of the vertical axis | shaft valve type water turbine power generation equipment which concerns on this invention. It is a schematic sectional side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Valve, 2 ... Generator, 3 ... Main shaft, 4 ... Runner, 5 ... Guide vane, 6 ... Stay, 8 ... Inspection port, 10 ... Elbow type duct, 11 ... Water flow adjustment cover, 12 ... Movable plate, 12a ... Horizontal rotation shaft, 12b ... side of tip, 13 ... actuator, 14 ... floating body movable plate, 15 ... rectifier, 20 ... free water surface, 21 ... water turbine generator, 51 ... first curved plate, 52 ... second curved plate 53 ... 3rd curved plate, 54 ... support plate, 60 ... mounting frame, 61 ... jig, 70 ... vertical flow channel, 71 ... vertical water supply port, 72 ... vertical flow channel connecting portion, 73 ... curved portion 73a ... curvature radius small portion, 73b ... curvature radius large portion, 74 ... horizontal water supply port, 75 ... horizontal flow channel connection portion, 76 ... side plate, 77 ... top plate, 80 ... horizontal flow channel, 81 ... end of horizontal flow channel Part, 82 ... stagnant water, 91 ... lattice top plate, 92 ... vertical plate, 94 ... lattice, 95 ... long plate, 9 a ... upper long sides, 95b ... lower long side

Claims (7)

A water turbine arranged such that the rotation axis faces the vertical direction;
A generator connected to and driven by the water wheel;
A horizontal flow path formed such that a free water surface is formed and water flows substantially horizontally toward the top of the water wheel;
A vertical flow path that extends downward from the opening formed at the bottom of the horizontal flow path toward the generator and that flows through the horizontal flow path to flow downward toward the water turbine. When,
Extending and connecting from the opening to the horizontal flow path upstream from the opening, and connected so that the cross-sectional area in the water flow direction increases smoothly from the downstream to the upstream. Elbow-shaped duct,
A vertical shaft type water turbine power generation facility characterized by comprising: A water turbine arranged such that the rotation axis faces the vertical direction;
A generator connected to and driven by the water wheel;
A horizontal flow path formed such that a free water surface is formed and water flows substantially horizontally toward the top of the water wheel;
A vertical flow path that extends downward from the opening formed at the bottom of the horizontal flow path toward the generator and that flows through the horizontal flow path to flow downward toward the water turbine. When,
A top plate having a lattice formed in a plane extending from the upper side of the opening to the upstream side in the horizontal channel while maintaining the same width as the horizontal channel, and a downstream end of the top plate A water flow adjusting cover comprising: a vertical plate fixed to the bottom of the horizontal flow path downstream from the opening;
A vertical shaft type water turbine power generation facility characterized by comprising: The lattice is formed such that a plurality of rectangular long plates extending in the width direction of the horizontal flow path are arranged at equal intervals in the water flow direction of the horizontal flow path,
The vertical valve-type water turbine power generation equipment according to claim 2, wherein the rectangular plane that receives the horizontal water flow of the long flat plate is inclined so that the long side on the downstream side of the horizontal flow path is downward. . On the upstream side of the horizontal flow path of the top plate, a horizontal water supply port for taking in water flowing through the horizontal flow path is formed,
The horizontal water supply port is a rectangular shape formed by being surrounded by a top plate disposed in the horizontal flow path and a bottom of the horizontal flow path,
A movable plate is attached to the upstream side of the horizontal water supply port so as to be rotatable around a horizontal rotation shaft arranged along one side of the top plate forming the horizontal water supply port. The vertical axis | shaft valve-type water turbine power generation equipment as described in any one of Claims 1 thru | or 3.   The vertical shaft type water turbine power generation facility according to claim 4, wherein an actuator for extending and contracting driving is attached to the movable plate so as to assist the rotation operation of the movable plate.   The vertical shaft type water turbine power generation facility according to claim 4 or 5, wherein the movable plate has a structure for maintaining buoyancy.   A plurality of curved plates having different radii of curvature are disposed below the top plate and above the opening, and the horizontal flow path is configured to receive the water flow of the horizontal flow path on the curved inner surface of the curved plates. The vertical valve-type water turbine power generation facility according to any one of claims 1 to 6, wherein the vertical-axis valve-type water turbine power generation equipment is arranged in ascending order of curvature radius from the upstream side toward the downstream side.

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