JP2011157872A - Transportable hydraulic power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transportable hydraulic power generating device for preventing the roll of stones into a water turbine while preventing the precipitation of deposited material such as sludge, and for reducing noises with the rotation of water turbine and suppressing the rotation stop of the water turbine due to the roll or hold of floating material flowing in a water passage into the water turbine to suppress the overflow of water from the water passage due to the rotation stop of the water turbine. <P>SOLUTION: A raised portion 22C is provided in a flowing water pathway 22 through which a water stream passes to rotate the water turbine 2. The raised portion 22C has a starting end located on the lower edge side of a flow-in port 23 and a finishing end located right under a center P1 of a water turbine shaft 7. It is formed in such a manner that a bottom plate 22A of the flowing water pathway 22 in a section from the starting end to the finishing end is raised into a streamlined shape. A slat 2B located at the outer periphery lower end of the water turbine 2 (an A-part in Fig.2) is flat-shaped with its blade tip 2B2 linearly oblique to a blade body 2B3 toward the water-stream downstream side (the right lower side in Fig.2) in the rotating direction of the water turbine 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable hydroelectric power generation apparatus that is installed in a water channel and generates power by rotating a water turbine using a water flow in the water channel.

  Conventionally, it is a variety of waterways such as agricultural waterways and other irrigation waterways or snowmelt ditches, snow diving ditches, drift snow ditches and other snow drainage channels, where the water channel inner width and water depth (water channel height) are relatively small. 2. Description of the Related Art A portable hydroelectric power generation apparatus is known that is installed in a thing and generates electricity by rotating a water turbine by a water flow flowing therethrough. An example of such a hydroelectric generator is described in Patent Document 1 described below.

JP 2009-114937 A

  However, in the above-described hydroelectric generator of Patent Document 1, dust and other floating substances flowing in the water channel are caught on the plate-like long member of the streak screen, and the streak screen is clogged. For this reason, there is a problem that the water flow in the water channel cannot be passed through the streak screen and is blocked and the water turbine cannot rotate smoothly, or the blocked water overflows from the water channel in large quantities. It was.

  Here, for example, when a hydroelectric power generation device is installed in an irrigation channel or a snow drainage channel, a piece of vegetable or a lump of snow often flows as a floating substance on the water stream. In such a case, if floating water is caught in or caught in the water turbine of the hydroelectric generator, the water flow is blocked and water overflows from the waterway, and the adjacent road surface or fields There is also a problem of flooding.

  In particular, when the water channel in which the hydroelectric generator is installed is relatively small, if the water flow in the water channel is blocked by the above-mentioned suspended matter being caught or caught in the water turbine, In addition, there is a danger that the water overflows from the water channel and floods the adjacent land, and there is a problem that it is practically impossible to drive the water wheel day and night in an unmanned state.

  Further, when the hydroelectric generator is installed and operated in a water channel, noise is generated due to a collision between a water flow flowing in the water channel and a water turbine. In particular, when the blade member at the lower end of the outer periphery of the water turbine has a concave curve on the upstream side in the water flow direction as in the hydroelectric generator of Patent Document 1, when the blade member enters the water flow, Since the water enters the surface of the blade member so as to strike the convex surface, there is a problem that a large noise is generated.

  In addition, in a water turbine having a blade member having such a curvature, it is considered that the water flow that collides with the curvature of the blade member is likely to be disturbed by splashing water droplets and generates a collision sound of a larger water flow. It is done. For this reason, there is a possibility that such noise may adversely affect the lives of residents. For example, there is a problem that it is not possible to generate power regardless of day and night by installing a hydroelectric power generation device in a water channel flowing through a residential area.

  Furthermore, as described above, when the streak screen is clogged and the water flow in the water channel is blocked, deposits such as sludge settle on the upstream side of the hydroelectric generator, and the water quality in the water channel deteriorates. There is also a problem that it ends up. If the hydroelectric generator is installed in the irrigation canal, the original function of the irrigation canal will be impaired if the irrigation canal is deteriorated, and it is preferable to operate the hydroelectric generator in such a situation. It can not be said.

  However, in the hydroelectric generator of Patent Document 1, if there is no streak screen, stones and the like that have been rolled by being pushed by the water flow in the water channel are caught in the water wheel, and the rotation of the water wheel is obstructed or the water wheel is Since there is a risk of failure or breakage, there is a problem that there is no suitable means for preventing rocks and the like from getting caught in the water wheel while preventing sedimentation of sludge.

  Therefore, the present invention has been made to solve the above-described problems, and while preventing sedimentation of deposits such as sludge, it also prevents the rocks from getting caught in the water wheel, and further, the rotation of the water wheel. A portable type that reduces the noise that accompanies and suppresses the suspension of water turbines from floating or being caught in water turbines, and prevents water from overflowing from the water turbines due to rotation of the turbines. It aims to provide a hydroelectric generator.

  In order to achieve this object, a portable hydroelectric generator according to claim 1 is a portable frame member formed so as to be installable in a water channel, and a water flow provided in the frame member is allowed to pass therethrough. A flow path, an inflow opening formed at the front end of the frame member for allowing a water flow to flow into the flow path, a downstream side of the inflow opening, and rotatably supported by the frame member; A vertical down-type water turbine that is rotationally driven by receiving a water flow that passes through the flow channel through the blade plate, and is configured as a unit. A section from the inlet to the bottom of the turbine at the bottom of the turbine is formed in a streamlined shape, and is provided between the raised section and the tip of the blade of the turbine. Upstream water A bottom gap that circulates from the downstream to the downstream side, and a tip end portion of the vane plate of the water turbine that faces the raised portion across the bottom gap and is bent at an obtuse angle with respect to the main body portion of the vane plate. The blade tip portion is provided obliquely in the direction of rotation.

  According to the portable hydroelectric generator of claim 1, by installing the frame member in the water channel, the water flow flowing through the water channel is provided in the frame member from the inlet opening at the front end of the frame member. It flows into a running water path and is sent to a water turbine arranged downstream of the inlet. The water flowing in from the inflow port passes over the raised part of the water flow path, flows into the outer peripheral lower end of the vertical epi-type water turbine, collides with the blades located at the outer peripheral lower end of the water turbine, The water wheel is rotated.

  The portable hydroelectric generator according to claim 2 is the portable hydroelectric generator according to claim 1, wherein the raised portion has a slope that rises sharply from the lower edge of the inflow port in a bow-like convex shape at the forefront thereof. It has a large steep slope section.

  According to the portable hydroelectric generator of the present invention, the raised portion of the water flow path is raised in the section from the inlet to the water turbine, so that the raised portion has been swept away by the water flow and rolled down the bottom of the water channel. Blocks stones, etc., and prevents them from entering the flowing water path in the frame member, preventing such stones from getting stuck in the bottom gap and inhibiting the rotation of the water turbine or causing the turbine to break down. There is an effect that can be done.

  In addition, since the raised portion has a form in which the section from the inlet to the water turbine is raised in a streamline shape from the bottom of the flow channel, it is relatively lighter than stones and deposits such as sludge that is easy to ride on the water flow. If it is an object, it can be put into the water flow without being deposited in front of the ridge, and can flow into the water flow path, and deposits such as sludge settle on the upstream side of the inflow port and the water in the water channel stagnates. There is an effect that can be prevented.

  And since the blade tip portion of the blade plate of the turbine wheel is bent so as to form an obtuse angle with respect to the main body portion of the blade plate and obliquely set in the direction of rotation of the turbine wheel, the blade plate collides with the water flow. The disturbance of the water flow in the water channel caused by the above is reduced, and the noise associated with the collision between the blades and the water flow is reduced.

  Further, since the blade tip portion of the water turbine is bent as described above and obliquely arranged in the direction of rotation of the water turbine, the blade tip portion moves from above the raised portion into the bottom gap by the rotation of the water wheel. At this time, there is an effect that the large floating matter whose blade tip portion has entered the bottom gap can be cut and pushed down to the downstream side of the flowing water path.

  Therefore, for example, even if a piece of vegetables or a lump of snow flows as a floating material on a water stream, it can be prevented from being caught in the bottom gap by cutting them with the blade tip, and the rotation of the water wheel It is possible to avoid the situation where the water stops and stops most of the water flow in the waterway, overflowing the water and flooding the adjacent road surface.

It is a side view of the hydroelectric generator which is one example of the present invention, and shows the state where the hydroelectric generator was installed in the channel. It is a longitudinal cross-sectional view of a hydroelectric generator, Comprising: It is sectional drawing in the II-II line of FIG. It is a partial perspective view of a flowing water path. It is a front view of a hydroelectric generator. It is a rear view of a hydroelectric generator. It is a top view of a hydroelectric generator.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The portable hydroelectric generator of this embodiment performs power generation by rotating a water turbine by a water flow flowing in a water channel. This portable hydroelectric generator is mainly used for various irrigation channels such as agricultural irrigation channels, snow melting channels, snow-melting channels, snow-flowing channels and other snow drainage channels, and the width and depth of the channel (water channel height). Is installed on a relatively small small scale.

  In addition, such a small-scale water channel may be of a type having a relatively small flow rate as installed on the side of the road, and the bottom surface of the water channel is stable when the portable hydroelectric generator is installed. In consideration of the property, it is preferably flat with no unevenness, and preferably formed with a U-shaped groove.

  FIG. 1 is a side view of a hydroelectric generator 1 according to an embodiment of the present invention, and shows a state in which the hydroelectric generator 1 is installed in a water channel 50. Here, the arrow X shown in FIG. 1 indicates the water flow direction in the water channel 50, and this water flow direction coincides with the front-rear direction (also referred to as the full length direction) of the hydroelectric generator 1.

  As shown in FIG. 1, the hydroelectric generator 1 is mainly configured to rotate a large and vertical epi-type (underhang) turbine 2 rotated by a water flow in a water channel 50 and the turbine 2. A frame member 3 integrally formed with a plurality of iron materials (hereinafter also referred to as “frame members”) for supporting, a speed increasing device 4 for speeding up the rotation of the water turbine 2, and the speed increasing device 4 The generator 5 is driven by the rotational force transmitted through the generator 5 and generates power, and the storage battery 6 that stores the electric power generated by the generator 5.

  The hydroelectric power generator 1 has a water channel height of about 0.5 m and a water channel width of about 0.5 based on the overall width of the frame base 3A of the frame member 3 and the lateral width of the door 25 described later. A water channel 50 having a size of about 1 m is set as the installation location. For example, the water channel 50 is installed in the water channel 50 and can generate power using a water flow having a depth of about 20 to 30 cm flowing at a flow rate of 40 to 50 m per minute. It is.

  The hydroelectric generator 1 is a unit that can be transported and moved by mounting the water wheel 2, the speed increasing device 4, the generator 5, and the storage battery 6 on the frame member 3 described above. Here, although the hydroelectric generator 1 is installed and used in the water channel 50, the part located in the lower end side of the outer periphery among the said hydroelectric generator 1 (henceforth "outer peripheral lower end part"). Only become submerged in the water stream.

  The water turbine 2 is of a large size capable of generating a large inertial force with its rotation, and has an outer diameter of about 2000 mm, for example. For this reason, when the hydroelectric generator 1 is installed in the water channel 50 that is the installation location, a large part of the water turbine 2 (a portion that is about 3/4 or more of the outer diameter) protrudes outside the water channel 50.

  The water wheel 2 is a vertical (horizontal axis) water wheel having a circular shape when viewed from the side, and both side surfaces in the width direction are covered with side plates 2A having a circular shape when viewed from the side (see FIGS. 4 to 6). ). A rotating shaft 7 (hereinafter referred to as “water turbine shaft 7”) is passed through and fixed in the center of the water turbine 2 in the horizontal direction.

  The water turbine shaft 7 is rotatably supported via a bearing 8 (hereinafter referred to as “water turbine bearing 8”) fixed to the frame member 3. Therefore, when the frame member 3 is installed in the water channel 50, the water turbine 2 receives the water flow in the water channel 50 that passes through the inside of the frame member 3, and the counterclockwise of FIG. Vertically rotated around.

  The frame member 3 is a structure on which the turbine 2, the speed increasing device 4, the generator 5, and the storage battery 6 are mounted, and an eye hook 9 that can engage with a crane hook for lifting the entire hydroelectric generator 1 is provided. A frame lifting portion 3C is provided. The overall length of the frame member 3 is about 3 m.

  In addition to the above-described frame lifting portion 3C, the frame member 3 includes a frame foundation portion 3A installed in the water channel 50 and submerged in water, and a water wheel above the water channel 50 supported by the frame foundation portion 3A. 2, a speed increasing device 4, and a frame upper frame portion 3 </ b> B that supports the generator 5.

  The frame base portion 3A has a frame structure in which the water turbine 2 can be accommodated and a water flow can pass therethrough, and a flowing water path 22 described later is provided as a part of the space in the frame structure. ing. Moreover, 3 A of flame | frame base parts are formed smaller than the width in the water channel of the water channel 50 used as an installation place mentioned above (refer FIG.4 and FIG.5). For example, the entire width of the frame base portion 3A is about 450 mm, and the frame base portion 3A can be installed in the water channel 50 having a water channel inner width larger than that.

  A turbine wheel bearing 8 is installed and fixed on the upper surface of the frame upper frame portion 3B, and the turbine 2 is rotatably supported on the front side (left side in FIG. 1) of the frame member 3 via the turbine wheel bearing 8. Yes. Further, the frame upper frame portion 3B is formed with a rectangular opening (see FIG. 6) in plan view that communicates with the space in the frame structure of the frame base portion 3A. It fits in the space in the frame structure of the frame base 3A through the opening of the frame 3B.

  Further, a first support base 3B1 that supports the speed increasing device 4 and a second support base 3B2 that is located behind and at a lower position are provided at the rear part of the frame upper frame part 3B.

  The speed increasing device 4 uses a multi-stage speed increasing mechanism for increasing the rotation of the water turbine 2 by using both chain transmission and V belt transmission. The driving sprocket 10, the driven sprocket 11, the driving sprocket 10 and the driven sprocket are used. 11, a belt pulley 12, a front pulley 13, a middle pulley 14, a rear pulley 15, a generator pulley 16, a first V belt 17 suspended between the front pulley 13 and the middle pulley 14, and a rear stage. A second V belt 18 is provided between the pulley 15 and the generator pulley 16.

  The driving sprocket 10 is integrally formed with one side plate 2 </ b> A (front side in FIG. 1) of the water turbine 2, and is rotated integrally with the water turbine 2 around the water turbine shaft 7. In addition, an endless annular chain belt 12 is hung on the outer peripheral portion of the driving sprocket 10, and this chain belt 12 is associated with a plurality of tooth portions (not shown) provided on the outer peripheral portion of the driving sprocket 10. Are combined.

  The driven sprocket 11 has a smaller diameter than the driving sprocket 10. The chain belt 12 is hung on the outer peripheral portion of the driven sprocket 11, and the chain belt 12 is engaged with a plurality of teeth (not shown) on the outer peripheral portion. A rotation shaft S1 is fixed through the center of the driven sprocket 11, and the rotation shaft S1 of the driven sprocket 11 is connected to a first support 3B1 of the frame upper frame portion 3B via a bearing 19 that is installed and fixed. It is supported rotatably.

  The front pulley 13 has a larger diameter than the driven sprocket 11 and a smaller diameter than the driving sprocket 10. A first V belt 17 is hung on the outer periphery of the front pulley 13, and the first V belt 17 is engaged with a V groove formed in the outer periphery of the front pulley 13. Further, the rotation axis S1 of the driven sprocket 11 is fixed through the center of the front pulley 13 and is rotated integrally with the driven sprocket 11 around the rotation axis S1.

  The middle pulley 14 is formed to have a smaller diameter than the driven sprocket 11. A first V belt 17 is hung on the outer peripheral portion of the intermediate pulley 14, and the first V belt 17 is engaged with a V groove that is recessed in the outer peripheral portion of the intermediate pulley 14. A rotation shaft S2 is fixed through the center of the middle pulley 14, and the rotation shaft S2 of the middle pulley 14 is provided via a bearing 20 that is installed and fixed on the second support 3B2 of the frame upper frame portion 3B. It is supported rotatably.

  The rear pulley 15 has a larger diameter than the middle pulley 14 and the same diameter as the driven sprocket 11. A second V belt 18 is hung on the outer peripheral portion of the rear pulley 15, and the second V belt 18 is engaged with a V groove in the outer peripheral portion of the rear pulley 15. The rear pulley 15 has a rotation shaft S2 of the middle pulley 14 fixed at the center thereof, and is rotated integrally with the middle pulley 14 about the rotation shaft S2.

  The generator pulley 16 has a larger diameter than the middle pulley 14 and a smaller diameter than the rear pulley 15. A second V belt 18 is hung on the outer peripheral portion of the generator pulley 16, and the second V belt 18 is engaged with a V groove in the outer peripheral portion of the generator pulley 16. Further, the generator pulley 16 is directly connected and fixed to the rotating shaft S <b> 3 of the generator 5.

  According to the speed increasing device 4 configured as described above, when the water turbine 2 is rotated by the water flow in the water channel 50, the driving sprocket 10 is rotated integrally with the water wheel 2, and the rotation causes the chain belt 12 to move. The driven sprocket 11 is rotated via the first sprocket 11 and the front pulley 13 is rotated together with the driven sprocket 11. The rotation rotates the middle pulley 14 via the first V belt 17, and the rear pulley 15 together with the middle pulley 14 is rotated. The generator pulley 16 is rotated via the second V belt 18 by this rotation, and the rotating shaft S3 of the generator 5 is rotated.

  The generator 5 is configured to generate electric power by rotating the rotation shaft S3 via the generator pulley 16, and the generated electric power is charged to the storage battery 6 through the cable 21. Yes. The storage battery 6 is, for example, a 24V lead storage battery, and is connected in series with the generator 5.

  The storage battery 6 is mounted on a mounting plate 28 that is separately provided on the frame base 3A, and this mounting plate 28 is disposed directly below the mounting plate 27 on which the generator 5 is mounted. ing. The mounting plate 28 is provided directly above the mounting plate 27 of the generator 5 but above the upper end of the water channel 50, and prevents the storage battery 6 from getting wet with the water overflowing from the water channel 50. Has been.

  FIG. 2 is a longitudinal sectional view of the hydroelectric generator 1, and FIG. 3 is a partial perspective view of the flowing water path 22, and is a sectional view taken along the line II-II in FIG. As shown in FIG. 2, a total of 24 blades 2 </ b> B are provided radially inside the water wheel 2 toward the outer peripheral edge of the water wheel 2 around the water wheel shaft 7. Moreover, these blades 2 </ b> B are provided at equal intervals in the circumferential direction of the water turbine 2.

  A base end portion 2B1 of each blade 2B (a portion on the central portion side of the turbine 2 (hereinafter referred to as “blade base 2B1”)) is bent at a right angle, and a tip 2B2 (water turbine 2) of each blade 2B is bent. A portion on the outer peripheral edge side (hereinafter referred to as “blade tip 2B2”) is bent in a cross-sectional shape. Further, a portion 2B3 (hereinafter referred to as “blade body portion 2B3”) excluding the blade base portion 2B1 and the blade tip portion 2B2 of each blade plate 2B is a straight line from the center (of the water turbine shaft 7) of the water turbine 2 toward the outer peripheral edge. It is formed in the shape of a flat plate.

  Here, the blade tip portion 2B2 of each blade plate 2B is bent at an obtuse angle with respect to the blade main body portion 2B3 by a length of about 50 mm in the size of the water turbine 2 having an outer diameter of about 2 m, for example. It is obliquely arranged in the direction of rotation of the water wheel 2 (counterclockwise direction in FIG. 2). About each blade 2B of a present Example, the blade tip part 2B2 is bent so that an angle (obtuse angle) of about 165 ° may be formed with respect to the blade body 2B3.

  In particular, if attention is paid to the blade 2B that has arrived at the portion A in FIG. 2 at the lower end of the outer periphery due to the rotation of the water turbine 2, the blade body 2B3 of the blade 2B is in a vertical posture and the vertical center line of the water turbine 2 On the other hand, the blade tip portion 2B2 has a flat plate shape that is linearly inclined toward the downstream side in the water flow direction (lower right side in FIG. 2) that is the rotation direction of the water turbine 2 with respect to the blade body portion 2B3. It has become.

  According to the blade plate 2B having the blade tip portion 2B2 provided obliquely, when the water turbine 2 rotates and the blade tip portion 2B2 enters the water flow, the blade tip portion 2B2 slides into the water from the tip. Therefore, the resistance when the blades 2B enter the water is reduced, and the collision noise with the water flow is also reduced accordingly.

  Moreover, the water flow that collides with the blade 2B after entering the water hits the surface curved in a convex shape of the blade tip 2B2 (curved surface of the blade tip 2B2 on the left side in the portion A in FIG. 2), and the blade 2B The lower end of the outer periphery of the water turbine 2 is pushed toward the downstream side of the water channel 50 and is guided to sink into the tip of the blade tip 2B2 along the inclination of the blade tip 2B2. It passes through the blade tip 2B2 and flows smoothly downstream of the water channel 50. As a result, the disturbance of the water flow in the water channel 50 caused by the collision between the blade plate 2B and the water flow is reduced, and the noise accompanying the collision between the blade plate 2B and the water flow is further reduced.

  Further, the water turbine 2 is provided with a gap between the blade plates 2B adjacent to each other in the circumferential direction. All of these gaps are open on the blade base portion 2B1 side of the blade plate 2B and communicate with the central portion of the water turbine 2. For this reason, when the water squeezed by the blade 2B remains in the gap, the water can be dropped into the water channel 50 through the center of the water turbine 2 and drained.

  Further, the blade base portion 2B1 is bent at a right angle toward the counter-rotation direction side of the water turbine 2 with respect to the blade main body portion 2B3, and is bent in a direction opposite to the blade tip portion 2B2. That is, all the blades 2B are raised after passing through the lower end of the outer periphery of the water turbine 2 by the rotation of the water turbine 2, so that the bent portion of the base end 2B1 is directed downward (in FIG. 2). (See part B.) By bending in this way, unnecessary water remaining on the blade 2B can be smoothly dropped into the water channel 50 and drained.

  As described above, the frame base 3A has a frame structure in the frame member 3, and a flowing water path 22 through which a water flow serving as a driving force of the water turbine 2 passes is incorporated as a part of the frame structure. (See FIG. 3). The water turbine 2 disposed on the frame member 3 is shaped so that the lower end of the outer periphery fits into the flowing water path 22.

  As shown in FIG. 3, the entire front surface of the frame base portion 3 </ b> A of the frame member 3 is a water flow inlet 23. This inflow port 23 is an opening for introducing and taking in the water flow in the water channel 50 to the water flow channel 22 provided in the frame base portion 3 </ b> A, and functions as an inlet of the water flow channel 22.

  The flowing water path 22 is a passage through which the water flow in the water path 50 passes from the front end to the rear end side of the frame member 3, and the water flow passing through the flowing water path 22 is located at the lower end of the outer periphery of the water turbine 2. The water turbine 2 is rotated by colliding with 2B.

  Here, the flowing water path 22 includes a bottom plate 22A that closes the bottom of the frame base portion 3A, and a pair of side wall plates 22B and 22B that closes both sides of the frame base portion 3A in the lateral width direction. The side wall plates 22B and 22B have a groove-shaped structure in which the bottom and both sides in the width direction are surrounded and the front and rear and the top are opened.

  That is, the water flow flowing in the water channel 50 flows from the inlet 23 into the water flow path 22 having the groove-shaped structure, and when passing through the water flow path 22 having this groove-shaped structure, as shown in FIG. Each blade 2B located at the lower end of the outer periphery of the water turbine 2 fitted in is pushed to rotate the water turbine 2.

  Returning to FIG. 2, the raised portion 22 </ b> C is formed on the bottom plate 22 </ b> A of the flowing water path 22. The raised portion 22C has a height from the lower surface of the frame base portion 3A to the top thereof of about 100 mm.

  The protruding portion 22C has a start end at the lower edge of the inflow port 23 and an end immediately below the center of the water wheel shaft 7, and a bottom plate 22A of the water flow path 22 in the section from the start end to the end is streamlined. It is formed by protruding. A steep slope section 22C1, a gentle slope section 22C2, and a descending section 22C3 are provided in order from the inlet 23 side to the downstream side of the water flow in the raised portion 22C of the water flow path 22.

  The steeply inclined section 22C1 is a section in which the cross-sectional shape is curved and formed in an arcuate convex shape, and the slope (gradient) that rises steeply from the inflow port 23 that is the foremost portion (starting end) of the raised portion 22C is large. Since the steeply inclined section 22C1 rises suddenly from the bottom surface of the water channel 50, stones and the like that have been pushed by the water flow and rolled down the bottom of the water channel 50 are dammed up so that they enter the water flow channel 22 in the frame member 3. Can be prevented.

  However, since the steeply inclined section 22C1 of the raised portion 22C of the bottom plate 22A is curved in an arcuate convex shape from the inflow port 23, if it is a deposit such as sludge that is relatively lighter than stones and easy to ride on the water current, It is possible to get on the raised portion 22C and flow into the flowing water path 22 by riding. For this reason, by installing the hydroelectric generator 1, it is possible to prevent deposits such as sludge from precipitating on the upstream side thereof and water in the water channel 50 from being swollen.

  The gentle slope section 22C2 has a cross-sectional shape curved in an arcuate convex shape, and is continuously provided behind the steep slope section 22C1. The gentle slope section 22C2 is formed with a gentler slope than the steep slope section 22C1, and rises from the end of the steep slope section 22C1 to draw a gentle curved surface downstream in the water flow direction. It reaches the top, and descends from the top so as to draw a gentle curved surface having an arcuate convex shape toward the downstream side in the water flow direction.

  The descending section 22C3 is a section whose cross-sectional shape is curved in an arcuate concave shape, continuously descends behind the gentle slope section 22C2, and is gently inclined compared to the steep slope section 22C1.

  In the descending section 22C3, a narrow gap W1 (hereinafter referred to as “bottom gap W1”) having a constant interval is provided between the raised portion 22C and the outer peripheral edge of the water turbine 2, and the bottom gap W1 is the water wheel shaft. 7 is formed continuously up to just below the center of 7. In addition, the space | interval of the bottom part space | gap W1 is about 10 mm.

  That is, the bottom gap W <b> 1 is provided between the water turbine 2 and the bottom plate 22 </ b> A as a gap communicating from the inlet 23 side to the drain outlet 24 side of the water flow path 22, and the water flow that pushes the water turbine 2 flows through the water flow path 22. The flow path has a circular arc shape in side view that can be rubbed from the space in front of the water wheel 2 to the space in the rear of the water wheel 2.

  In this manner, the bottom portion (bottom plate 22A) of the raised portion 22C is formed such that the raised portion 22C is continuously formed from the inflow port 23 to directly below the center of the water wheel shaft 7, and downstream of the raised portion 22C in the water flow direction. A flat portion 22 </ b> D extending horizontally toward the surface is further continuously formed. Further, the flat portion 22D is extended to the downstream side of the water channel 50 by a predetermined length from directly below the center of the water wheel shaft 7, and the end of the flat portion 22D does not exceed a range directly below the entire water turbine 2. It is interrupted.

  Each side wall plate 22B of the flowing water path 22 extends further rearward than the end of the flat portion 22D of the bottom plate 22A. The height of each side wall plate 22B is higher on the inlet 23 side of the flowing water path 22 than on the outlet 24 side of the flowing water path 22 (see FIG. 3). In particular, the height of the range where the raised portion 22C exists in each side wall plate 22B is made larger than the water channel height. This is to prevent the water flow that flows in from the inflow port 23 and tries to get over the raised portion 22 </ b> C from overflowing from the flow channel 22 to the outside of the water channel 50.

  In addition, except for the bottom plate 22A and the pair of side wall plates 22B constituting the flowing water path 22, the frame structure of the frame foundation portion 3A is merely a frame material that is a framework, and the bottom surface of the frame foundation portion 3A, both lateral sides. There is no member that covers the surface and the rear end surface. For this reason, the frame structure of the frame base portion 3 </ b> A can freely discharge the water flow that has passed through the flowing water path 22 to the downstream side of the water path 50, and the water stays in the frame member 3 to inhibit the rotation of the water turbine 2. Can be prevented.

  Further, the bottom gap W1 described above has a small vertical width (the width between the outer peripheral edge of the water turbine 2 and the bottom plate 22A), and is, for example, about 10 mm. For this reason, it is assumed that when the suspended matter riding on the water flow gets over the raised portion 22C and enters the bottom gap W1, it is sandwiched between the blade tip portion 2B2 of the water turbine 2 and the bottom plate 22A, thereby preventing the rotation of the water turbine 2. Is done.

  For example, when the water channel 50 in which the hydroelectric generator 1 is installed is an agricultural water channel that flows around the farmland or a snow drainage channel that flows through a snowy area, a piece of vegetable or a lump of snow flows as a floating substance on the water flow. When these are actually caught in the bottom gap W1, the rotation of the water turbine 2 stops and the water flow in the water channel 50 is blocked, and water immediately overflows from the water channel 50 immediately after the water turbine 2 stops. It is assumed that the road surface 51 to be flooded.

  In particular, the water channel 50 in which the hydroelectric generator 1 of the present embodiment is installed is a small-scale one whose inner width is relatively narrow, and all the water on the upstream side of the hydroelectric generator 1 flows from the inflow port 23. It is used in a mode of feeding into the path 22, and the bottom gap W1 is narrow as described above. When the rotation of the water turbine 2 is actually stopped, the water flow blocked by the water turbine 2 is blinking momentarily. There is a risk of overflowing from the water channel 50.

  In addition, in such an environment where the floating material flows, if the floating material is caught in the bottom gap W1 and a large amount of water overflows from the water channel 50, the water turbine 2 of the hydroelectric generator 1 is used. It doesn't mean that it keeps rotating unattended both day and night.

  However, since the blade tip 2B2 of the water turbine 2 of the hydroelectric generator 1 according to the present embodiment is bent in the above-described form (see A portion in FIG. 2), the blade tip 2B2 is the water turbine 2 of FIG. When moving from above the raised portion 22C into the bottom gap W1, the blade tip 2B2 cuts a large suspended matter that has entered the bottom gap W1 and pushes it to the downstream side of the flowing water path 22. it can.

  Moreover, most of the water wheel 2 is of a large size that protrudes from the water channel 50 and is entirely formed of a heavy object such as an iron plate, so that the generated inertia force is large, and the blade tip portion 2B2 of the blade plate 2B is large. It is possible to generate a sufficient force necessary for cutting the suspended matter.

  FIG. 4 is a front view of the hydroelectric generator 1, and FIG. 5 is a rear view of the hydroelectric generator 1. 4 and 5, illustration of each blade 2B of the water turbine 2 is omitted, and a state in which the pair of doors 25, 25 are most opened is indicated by a two-dot chain line. In this embodiment, the width of each door 25 is about 400 mm, and the width between the free ends of each door 25 is about 1250 mm with the pair of doors 25, 25 being most open. ing.

  As shown in FIG. 4, the front end surface of the frame base portion 3 </ b> A is all opened as an inflow port 23. As shown in FIGS. 4 and 5, each pillar plate 3A1 of the frame base portion 3A is a thin plate having a small lateral width in order to reduce the resistance received from the water flow flowing in the water channel 50. An iron plate having the same thickness as that of the side wall plate 22B of the flowing water path 22 is used as the lateral width of 3A1. Further, by making the column plate 3A1 of the frame base portion 3A into a plate shape in this way, the ratio of the horizontal width of the inflow port 23 to the horizontal width of the frame base portion 3A is increased.

  Opening / closing doors 25 are attached to both sides of the front end portion of the frame base portion 3A in the widthwise direction through hinges 26 so as to be freely opened and closed. The pair of open / close doors 25, 25 are rotated around a vertical axis via a hinge 26 interposed between the frame base portion 3A, closed inward and opened outward. .

  According to this pair of opening and closing doors 25, 25, when the inner width of the water channel is larger than the entire width of the frame base portion 3A, the frame is opened outward and the free end is brought into contact with the inner wall surface of the water channel 50. A gap formed between the base portion 3A and the side wall of the water channel 50 is closed, whereby the water flow in the water channel 50 can be guided to the inflow port 23 without passing through both sides of the frame base portion 3A.

  The full width of the frame upper frame portion 3B is formed to be larger than the full width of the frame base portion 3A, but the frame upper frame portion 3B can be connected to the water channel even when the frame base portion 3A is installed in the water channel 50. Since the shape protrudes above 50, contact interference with the inner wall surface of the water channel 50 does not occur. Further, water turbine bearings 8 that support the water turbine shaft 7 are respectively fixed to both sides of the frame upper frame portion 3B in the horizontal width direction, and the water turbine shaft 7 is pivoted between the two water turbine bearings 8 and 8.

  In addition, the frame lifting portion 3C includes a column portion 3C1 that is vertically erected from both sides in the width direction of the frame member 3, and a beam portion 3C2 that is installed and fixed between the column portions 3C1. A frontal portal shape is formed by the column part 3C1 and the beam part 3C2. Further, in the frame lifting portion 3C, the lower end of each column portion 3C1 is fixed to the frame upper frame portion 3B, and the eye hook 9 is attached to the central portion in the horizontal width direction of the beam portion 3C2.

  As shown in FIG. 5, a first support base 3B1 and a second support base 3B2 are erected on both sides of the frame upper frame portion 3B in the horizontal width direction, and each first support base 3B1 is driven. Bearings 19 that support a common rotating shaft S1 are fixed to the sprocket 11 and the front pulley 13, respectively, and the rotating shaft S1 is mounted between the bearings 19 and 19. Further, each second support 3B2 is fixed with a bearing 20 that supports a common rotating shaft S2 for the middle pulley 14 and the rear pulley 15, and the rotating shaft S2 is interposed between the two bearings 20 and 20. It is pivoted.

  FIG. 6 is a plan view of the hydroelectric generator 1, in which a plurality of blade plates 2 </ b> B in the water turbine 2 are not shown, and a state in which the pair of doors 25 and 25 are most opened is 2. This is illustrated by the dotted line. As shown in FIG. 6, the mounting plate 27 described above is disposed on the rear portion of the frame upper frame portion 3 </ b> B, and the generator 5 is mounted and fixed on the mounting plate 27.

  The installation location of the storage battery 6 does not necessarily have to be on the mounting plate 28 provided on the frame base 3 </ b> A separately from the generator 5, and is disposed on the mounting plate 27 together with the generator 5. You may do it.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

1 Hydroelectric generator (portable hydroelectric generator)
2 Turbine 2B Blade 2B1 Blade body (blade body)
2B2 blade tip (tip of blade, blade tip)
3 Frame member 22 Flow path 23 Inlet 22C Raised part 22C1 Steep slope section 50 Water path W1 Bottom gap

Claims (2)

A frame member having portability formed so as to be installable in a water channel, a water flow path provided in the frame member for passing a water flow in the water channel, and a front end of the frame member for allowing the water flow to flow into the water flow channel An inflow opening formed in the opening, and disposed downstream of the inflow opening, rotatably supported by the frame member, and having a plurality of vanes that pass through the flowing water path. In a portable hydroelectric power generator unitized with a vertical epi-hydraulic turbine that is rotationally driven by receiving a water flow,
A raised portion formed by raising a section from the inlet at the bottom of the water flow path to directly below the water wheel in a streamline shape;
A bottom gap that is provided between the raised portion and the tip of the blade of the water wheel to flow the water flow in the water flow path from the upstream side to the downstream side;
The tip of the bladed blade of the water turbine facing the raised portion across the bottom gap is bent at an obtuse angle with respect to the main body of the bladed blade and is obliquely arranged in the direction of rotation of the waterwheel. A portable hydroelectric generator comprising a blade tip.   2. The portable hydroelectric power generation according to claim 1, wherein the raised portion is provided with a steeply inclined section having a large slope rising from the lower edge of the inflow port in an arcuate convex shape at the foremost portion thereof. apparatus.

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