JP7274738B2 - Water intake dust remover and small hydroelectric power generation system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water intake dust remover and a small hydroelectric power generation system.

Conventionally, a water intake dust remover is used in a hydroelectric power generation system. Patent Document 1 discloses a dust removal device that removes pebbles, sand, fallen leaves, garbage, etc. mixed in the water supplied to the hydroelectric power generator when water is taken into the hydroelectric power generator in the micro hydroelectric power generation system.

Japanese Patent No. 5149485

By reducing the mesh size of the filter to remove foreign matter mixed in the water supplied to the hydraulic power generator, the foreign matter can be easily removed. However, when the mesh size of the filter is reduced, there is a problem that the water intake efficiency is lowered.

Therefore, the present invention has been made in view of these points, and an object of the present invention is to provide a water intake dust remover that can easily remove foreign matter while suppressing a decrease in water intake efficiency.

In a first aspect of the present invention, an upper filter having a plurality of upper bar-shaped members extending in the direction of water flow, and a filter provided below the upper filter and extending in a horizontal direction orthogonal to the direction of water flow. and a lower filter having a plurality of lower rod-like members having upwardly convex curved surfaces.

Further, the cross section of the lower rod-shaped member may have an arc, and a straight line connecting both ends of the arc may be inclined upward with respect to the direction of the water flow as it goes downstream in the direction of the water flow. Further, the upper rod-shaped member may have a V-shaped cross section.

Further, a shaft portion extending in the horizontal direction may be further provided, and the shaft portion may move the end portion of the upper rod-shaped member on the downstream side of the water flow with respect to the lower filter. a connection portion connecting the upper rod-shaped member to the shaft portion in a state in which the end portion of the upper rod-shaped member on the downstream side of the water flow is movable with respect to the lower filter; It may further include a cover that covers the region in contact with the shaft from above.

Further, a plate-shaped member extending in the direction of the water flow may be further provided on the upstream side of the water flow of the plurality of upper rod-shaped members to allow the water flow to flow while suppressing turbulence of the flow.

A second aspect of the present invention is characterized by comprising any one of the water intake dust removers described above, and a generator that generates power using the intake water and the water from which foreign matter has been removed by the water intake dust remover. To provide a small hydroelectric power generation system.

ADVANTAGE OF THE INVENTION According to this invention, it is an intake dust remover. WHEREIN: It is effective in becoming easy to remove a foreign material, suppressing decline in water intake efficiency.

1 shows the configuration of a small hydroelectric power generation system having a water intake dust remover according to a first embodiment; 4 shows a state in which the members constituting the intake water dust remover according to the first embodiment are separated; Figure 2 shows the structure of the upper filter; It is an enlarged view of an upper rod-shaped member. It is an enlarged view of an upper rod-shaped member, an axial part, and a connection part. Figure 2 shows the structure of the lower filter; 4 is an enlarged cross-sectional view of a lower rod-shaped member; FIG. An upper rod-shaped member as a modified example is shown. The configuration of a small hydroelectric power generation system having a water intake dust remover according to a second embodiment is shown. The structure of the intake water dust remover which concerns on 2nd Embodiment is shown. The configuration of a small hydroelectric power generation system having a water intake dust remover as a modified example is shown. The structure of the rectifying plate as a modified example is shown.

<First Embodiment>
[Configuration of small hydroelectric power generation system R]
FIG. 1 is a diagram showing the configuration of a small hydroelectric power generation system R having a water intake dust remover S according to the first embodiment. FIG. 1(a) is a diagram showing a state in which the small hydroelectric power generation system R is viewed from above. FIG. 1(b) is a diagram showing a state in which the small hydroelectric power generation system R is viewed from the side.

The small hydroelectric power generation system R generates electricity using hydraulic power. The small hydroelectric power generation system R uses the water flowing through the first waterway A to generate electricity. The first waterway A is a waterway through which water containing foreign matter X flows. The first waterway A includes, for example, a river or an artificial waterway. Foreign matter X includes, for example, fallen leaves, garbage, pebbles, twigs, leaves, grass, and algae. Water containing foreign matter X is flowing in the first water channel A.

The small hydroelectric power generation system R has a water intake T, a water intake dust remover S, a second waterway U, and a generator V. The water intake T is a box-shaped container having an upper opening. The water intake T is provided in the first waterway A. Specifically, the water intake T is provided at the bottom of the first water channel A, for example. The water intake device T stores water from which the foreign matter X has been removed by the water intake dust remover S from the water containing the foreign matter X flowing through the first water passage A, and flows the stored water to the second water passage U.

The water intake dust remover S takes in a part of the water containing the foreign matter X flowing through the first water passage A and removes dust from the water. The water intake dust remover S is desired to remove the foreign matter X and improve the water intake efficiency in order to use the water containing the foreign matter X flowing through the first water passage A in the power generator V. The water intake efficiency is the ratio of the amount of water taken by the water intake dust remover S for use by the generator V to the amount of water flowing above the water intake dust remover S and containing the foreign matter X.

The water intake dust remover S is provided in the water intake T. As shown in FIG. Specifically, the water intake dust remover S is provided in an opening formed above the water intake T, for example. The water containing the foreign matter X flowing through the first water passage A flows above the water intake dust remover S. The water containing the foreign matter X flows above the water intake dust remover S, and the water from which the foreign matter X has been removed flows downward of the water intake dust remover S. Specifically, as the water containing the foreign matter X flows above the water intake dust remover S, of the water containing the foreign matter X flowing above the water intake dust remover S, the foreign matter X and part of the water flow from upstream to downstream. The water from which the foreign matter X has been removed while flowing toward the water intake dust remover S flows downward. The water from which the foreign matter X has been removed, which flows downward in the water intake dust remover S, is accumulated in the water intake T. Details of the water intake dust remover S will be described later.

The second waterway U is a waterway through which water is taken in and dust-removed by the water intake dust remover S, and the water collected in the water intake device T flows. The second waterway U is, for example, an artificial waterway. The second water channel U allows the water from which the foreign matter X has been removed by the intake water dust remover S to flow. One end of the second water channel U is provided below the water intake T, and the other end of the second water channel U is provided near the generator V, for example. The water from which the foreign matter X has been removed by the water intake dust remover S flows through the second water passage U and flows into the generator V. As shown in FIG. The generator V uses the water flowing out of the second waterway U to generate electricity. The generator V is provided near the other end of the second water channel U, for example.

[Structure of water intake dust remover S]
FIG. 2 is a diagram showing a state in which the members constituting the water intake dust remover S according to the first embodiment are separated. FIG. 3 is a diagram showing the structure of the upper filter 2. As shown in FIG. FIG. 4 is an enlarged view of the upper bar member 21. As shown in FIG. FIG. 5 is an enlarged view of the upper rod-shaped member 21, the shaft portion 4, and the connecting portion 5. FIG. FIG. 6 is a diagram showing the structure of the lower filter 3. As shown in FIG. FIG. 7 is an enlarged cross-sectional view of the lower rod-shaped member 31. As shown in FIG. FIG. 7(a) is an enlarged cross-sectional view of the lower rod-shaped member 31. FIG. FIG. 7(b) is an enlarged cross-sectional view of a lower bar member 31a as a comparative example.

The water intake dust remover S has a frame portion 1 , an upper filter 2 , a lower filter 3 , a shaft portion 4 , a connection portion 5 and a cover 6 . The frame portion 1 is a frame portion outside the water intake dust remover S. As shown in FIG. The frame portion 1 has a front frame portion 11 , a left frame portion 12 , a right frame portion 13 and a rear frame portion 14 . The front frame portion 11 is a front frame portion of the water intake dust remover S. As shown in FIG. The front frame portion 11 is a plate-shaped member extending in the width direction of the water intake dust remover S. As shown in FIG. The left end of the front frame portion 11 is fixed to the front end of the upper surface of the left frame portion 12 by a fastening member. The right end of the front frame portion 11 is fixed to the front end of the upper surface of the right frame portion 13 by a fastening member.

The left frame portion 12 is a frame portion on the left side of the water intake dust remover S in the width direction. The left frame portion 12 extends in the front-rear direction of the water intake dust remover S. As shown in FIG. The left frame portion 12 has a plurality of holes. The plurality of holes are holes into which a fastening member for fixing the left end of the lower rod-shaped member 31 of the lower filter 3 (to be described later) and a fastening member for fixing the left end of the shaft portion 4 (to be described later) are inserted.

The right frame portion 13 is a frame portion on the right side of the water intake dust remover S in the width direction. The right frame portion 13 extends in the front-rear direction of the water intake dust remover S. As shown in FIG. The right frame portion 13 has a plurality of holes. The plurality of holes are holes into which a fastening member for fixing the right end of the lower rod-shaped member 31 of the lower filter 3 (to be described later) and a fastening member for fixing the right end of the shaft portion 4 (to be described later) are inserted.

The rear frame portion 14 is a rear frame portion of the water intake dust remover S. As shown in FIG. The rear frame portion 14 extends in the width direction of the water intake dust remover S. The left end of the rear frame portion 14 is fixed to the rear end of the left frame portion 12 by a fastening member. The right end of the rear frame portion 14 is fixed to the rear end of the right frame portion 13 by a fastening member.

The upper filter 2 removes the foreign matter X from the water containing the foreign matter X and also removes the bubbles contained in the water. The upper filter 2 has a plurality of upper rod-shaped members 21 . The upper rod-shaped member 21 extends in the direction of water flow. The upper rod-shaped member 21 is supported by the shaft portion 4, which will be described later.

A first space is formed between a plurality of adjacent upper rod-shaped members 21 . The upper filter 2 removes, for example, from the water containing the foreign matter X, at least the foreign matter X larger than the width of the first space among the foreign matter X. The water flow, for example, causes at least the foreign substances X larger than the width of the first space among the foreign substances X to flow from upstream to downstream in the water flow above the plurality of upper rod-shaped members 21 together with the water. As a result, the water from which some foreign matter X has been removed flows below the upper filter 2 .

Since the upper filter 2 has a plurality of upper rod-shaped members 21 extending in the direction of water flow, water can easily flow in the longitudinal direction of the upper rod-shaped members 21, and the width of the upper filter 2 is larger than the width of the first space. A parted foreign object X can be prevented from falling toward the water intake T.

As shown in FIG. 4, the upper rod-shaped member 21 has, for example, a V-shaped cross section that is convex downward. The water intake dust remover S has the upper filter 2 having such an upper rod-shaped member 21, so that the foreign matter X contained in the water flowing above the upper rod-shaped member 21 is removed along the V-shaped groove of the upper rod-shaped member 21. It can flow downstream. Therefore, since the water intake dust remover S has the upper filter 2 having such an upper rod-shaped member 21, it becomes more difficult for the foreign matter X to drop into the water intake T. As shown in FIG.

The lower filter 3 removes the foreign matter X from the water containing the foreign matter X. The lower filter 3 is provided below the upper filter 2 . The lower filter 3 has a plurality of lower bar-shaped members 31 . The lower rod-shaped member 31 is fixed between the left frame portion 12 and the right frame portion 13 . Specifically, the left end of the lower rod-shaped member 31 is fixed to the left frame portion 12 by a fastening member inserted into a hole formed in the left frame portion 12 . A right end of the lower rod-shaped member 31 is fixed to the right frame portion 13 by a fastening member inserted into a hole formed in the right frame portion 13 .

A second space is formed between the plurality of adjacent lower rod-shaped members 31 . The lower filter 3 removes, for example, foreign matter X that is at least larger than the width of the second space. The water flow, for example, causes at least foreign substances X larger than the width of the second space among the foreign substances X to flow from upstream to downstream in the water flow above the plurality of lower rod-shaped members 31 together with water. As a result, water from which some of the foreign matter X has been removed flows below the lower filter 3 . The lower filter 3 may, for example, remove foreign matter X that is difficult to remove with the upper filter 2 . The first space and the second space are sizes of the foreign matter X allowed by the generator V, and depend on the model of the generator V. FIG.

The lower rod-shaped member 31 extends in a horizontal direction perpendicular to the direction of water flow, and has an upwardly convex curved surface. That is, the cross section of the lower rod-shaped member 31 has an upwardly convex arc. Since the water intake dust remover S has such a lower rod-shaped member 31, water flowing from upstream to downstream collides with the lower rod-shaped member 31, thereby decelerating the water flow. Water is then effectively guided downward by the Coanda effect and gravity. Therefore, the water intake dust remover S can improve the water intake efficiency by having such a lower rod-shaped member 31 . In addition, since the water intake dust remover S has the lower rod-shaped member 31 having the upwardly convex curved surface, the water containing the foreign matter X can easily flow along the surface of the lower rod-shaped member 31. It is possible to make it difficult for the foreign matter X to get caught on the lower rod-shaped member 31 .

As described above, the water intake dust remover S is provided above the lower filter 3 in this way, and the upper filter 2 having a plurality of upper rod-like members 21 extending in the direction of water flow allows The foreign matter X that is contained becomes easier to flow from upstream to downstream above the upper rod-shaped member 21 . In addition, the water intake dust remover S extends in the horizontal direction orthogonal to the direction of the water flow, and has a lower filter 3 including a plurality of lower bar-shaped members 31 having curved surfaces that are convex upward. The efficiency is improved and foreign matter X is less likely to be caught. As a result, the water intake dust remover S can easily remove foreign matter while suppressing a decrease in water intake efficiency.

As shown in FIG. 7(a), in the water intake dust remover S, the cross section of the lower rod-shaped member 31 has an arc, and a straight line connecting both ends of the arc extends downstream in the direction of water flow. It slopes upward as you go. As shown in FIG. 7(b), the lower rod-shaped member 31a as a comparative example has a cross-section that is arcuate compared to the lower rod-shaped member 31, but the straight line connecting both ends of the arc is It differs in that it extends in the direction of water flow.

When the lower rod-shaped members 31a shown in FIG. 7B are provided, a position having a width smaller than the size of the foreign matter X in the second space formed between the plurality of lower rod-shaped members 31a and a lower rod-shaped member 31a The distance in the height direction of the water intake dust remover S between the upper end of the member 31a is increased.

Therefore, when such lower rod-shaped members 31a are provided, the foreign matter X contained in the water tends to enter deep regions in the second space formed between the plurality of lower rod-shaped members 31a. Foreign matter X that has entered a deep region in the second space formed between the plurality of lower rod-shaped members 31a is less likely to flow out of the second space. As a result, when such a lower rod-shaped member 31a is provided, the foreign matter X tends to accumulate in the lower filter 3. As shown in FIG.

On the other hand, in the water intake dust remover S, as shown in FIG. 7(a), the cross section of the lower rod-shaped member 31 has an arc, and a straight line connecting both ends of the arc indicates the direction of the water flow. slopes upward as it goes downstream in the direction of . Since the water intake dust remover S has such a lower rod-shaped member 31, compared with the case where the lower rod-shaped member 31a is provided, in the second space formed between the plurality of lower rod-shaped members 31 The distance in the height direction of the water intake dust remover S between the position where the width is smaller than the size of the foreign matter X and the upper end of the lower rod-shaped member 31 can be reduced.

Therefore, the foreign matter X that has entered the second space formed between the plurality of lower rod-shaped members 31 is likely to flow out of the second space by being pushed by water. As a result, since the water intake dust remover S has the lower filter 3 provided with such a lower rod-shaped member 31 , the foreign matter X is less likely to accumulate in the lower filter 3 .

As shown in FIG. 2, the shaft portion 4 extends in a horizontal direction orthogonal to the direction of water flow. As shown in FIG. 5, the shaft portion 4 has, for example, a cylindrical shape. The shaft portion 4 allows the downstream end portion of the upper rod-shaped member 21 to move relative to the lower filter 3 . Specifically, the shaft portion 4 supports the upper rod-shaped member 21 in a state in which the end of the upper rod-shaped member 21 on the downstream side of the water flow is movable with respect to the lower filter 3 . The shaft portion 4 is fixed between the left frame portion 12 and the right frame portion 13 . Specifically, the left end of the shaft portion 4 is fixed to the left frame portion 12 by a fastening member inserted into a hole formed in the left frame portion 12 . A right end of the shaft portion 4 is fixed to the right frame portion 13 by a fastening member inserted into a hole formed in the right frame portion 13 .

The connection portion 5 rotatably connects the upper rod-shaped member 21 to the shaft portion 4 . Specifically, the connecting portion 5 connects the upper rod-shaped member 21 to the shaft portion 4 in a state in which the end portion of the upper rod-shaped member 21 on the downstream side of the water flow is movable with respect to the lower filter 3 . The connecting portion 5 is provided at the end of the upper rod-shaped member 21 on the upstream side of the water flow. A recess 51 is formed at the lower end of the connecting portion 5 . The shaft portion 4 is inserted into the concave portion 51 . The connecting portion 5 and the upper rod-shaped member 21 have a gravity balance with the shaft portion 4 as a fulcrum. That is, the connection portion 5 and the upper rod-shaped member 21 are balanced in the moment of force on both sides in the longitudinal direction with the shaft portion 4 as a fulcrum. It extends in the horizontal direction orthogonal to the height direction of the container S.

Since the water intake dust remover S has such a shaft portion 4 , the downstream end portion of the upper rod-like member 21 can be moved with respect to the lower filter 3 . Therefore, in the water intake dust remover S, the downstream end of the upper rod-shaped member 21 is not fixed to the lower filter 3, but is left open so that it can be moved. It becomes easier to discharge the foreign matter X that has entered between the downstream.

Specifically, for example, the foreign matter X that has passed downward through the first space formed between the plurality of upper rod-shaped members 21 of the upper filter 2 and the water flow that has collided with the passing foreign matter X By colliding with the upper rod-shaped member 21, the downstream end of the upper rod-shaped member 21 extending in the horizontal direction orthogonal to the height direction of the water intake dust remover S is pushed upward, It jumps upward with respect to the lower filter 3. Then, the end portion of the upper rod-shaped member 21 on the downstream side of the water flow jumps upward with respect to the lower filter 3 , so that the foreign matter X moves upward from below the upper filter 2 . As a result, in the water intake dust remover S, even if the foreign matter X passes through the upper filter 2 , it becomes difficult for the foreign matter X to remain between the upper filter 2 and the lower filter 3 .

As shown in FIG. 2 , the cover 6 covers the shaft portion 4 and the region of the connection portion 5 in contact with the shaft portion 4 from above. The cover 6 is provided in an openable/closable state. Specifically, the end of the cover 6 opposite to the end on the rear frame portion 14 side of the cover 6 is movable with respect to the region of the shaft portion 4 and the connecting portion 5 that is in contact with the shaft portion 4 . It is connected to the rear frame portion 14 in such a state. More specifically, the end portion of the cover 6 on the rear frame portion 14 side is connected to the rear frame portion 14 via, for example, a hinge.

In FIG. 2, two covers 6 are provided in the width direction of the water intake dust remover S, but the number of covers 6 is arbitrary. For example, one cover 6 may be provided in the width direction of the water intake dust remover S. By having such a cover 6 , the water intake dust remover S can prevent the foreign matter X contained in the water from winding around the shaft portion 4 or getting caught on the connection portion 5 .

[Modification 1]
FIG. 8 is a diagram showing an upper rod-shaped member 21b as a modified example.
The upper rod-shaped member 21b differs from the upper rod-shaped member 21 in that its cross section is rectangular. The upper rod-shaped member 21b is provided so that its flat surface faces upward. Moreover, the surface of the upper rod-shaped member 21b may be processed with alumite, which is a hydrophilic member. Since the water intake dust remover S has the upper filter 2 having such an upper rod-shaped member 21b, the water containing the foreign matter X can flow easily above the upper rod-shaped member 21b.

[Modification 2]
In the above-described embodiment, each member constituting the water intake dust remover S is fixed to each other by fastening members, but the present invention is not limited to this. Each member constituting the water intake dust remover S may be fixed by other fixing means such as a gap member, fitting, or light press-fitting member.

[Effects of the water intake dust remover S according to the first embodiment]
The water intake dust remover S according to the present embodiment includes an upper filter 2 having a plurality of upper bar-shaped members 21 extending in the direction of water flow, and a horizontal filter provided below the upper filter 2 and perpendicular to the direction of water flow. a lower filter 3 having a plurality of lower rod-like members 31 extending in the direction of the filter and having curved surfaces convex upward.

Therefore, the water intake dust remover S according to the first embodiment is provided above the lower filter 3 in this way, and has the upper filter 2 in which the plurality of upper bar-shaped members 21 extend in the direction of water flow. This makes it easier for the foreign matter X contained in the water to flow from upstream to downstream above the upper rod-shaped member 21 . In addition, the water intake dust remover S extends in the horizontal direction perpendicular to the direction of the water flow, and has the lower filter 3 including the lower rod-shaped member 31 having a curved surface convex upward, thereby increasing the water intake efficiency. As it improves, it becomes difficult for the foreign matter X to get caught. In addition, the water intake dust remover S can discharge the foreign matter X that has entered between the upper filter 2 and the lower filter 3 . As a result, the water intake dust remover S can easily remove the foreign matter X and improve the water intake efficiency.

<Second embodiment>
FIG. 9 is a diagram showing the configuration of a small hydroelectric power generation system Ra having a water intake dust remover Sa according to the second embodiment. FIG. 9(a) is a diagram showing a state of the small hydroelectric power generation system Ra viewed from above. FIG. 9(b) is a diagram showing a state in which the small hydroelectric power generation system Ra is viewed from the side. FIG. 10 is a diagram showing the structure of the water intake dust remover Sa according to the second embodiment. Note that FIG. 10 shows a state in which the two upper rod-shaped members 21 are removed. As shown in FIG. 10 , a lower rod-shaped member 31 is provided below the upper rod-shaped member 21 .

The small hydroelectric power generation system Ra differs from the small hydroelectric power generation system R in that it has an intake water dust remover Sa instead of the water intake dust remover S. The water intake dust remover Sa differs from the water intake dust remover S in that it has a rectifying plate 7a and a base 8a. The straightening plate 7a is a member for straightening the water flow. Even when the water flow is turbulent, the rectifying plate 7a can make the water flow parallel to the direction in which the upper rod member 21 extends. The straightening plate 7 a is provided upstream of the plurality of upper rod-shaped members 21 with respect to the water flow. The details of the current plate 7a will be described later. The base 8a is a member for fixing the frame portion 1 and the current plate 7a. The frame portion 1 and the current plate 7a are fixed to the upper surface of the base 8a.

The current plate 7a has a flat plate portion 71a and a plate-like member 72a. The flat plate portion 71a has a flat upper surface and extends in a horizontal direction perpendicular to the height direction of the water intake dust remover Sa. For example, the upper surface of the flat plate portion 71a is positioned at the same height as the upper surfaces of the plurality of upper rod-shaped members 21 in the height direction of the water intake dust remover Sa. It may be located above the top surface. The plate member 72a extends in the direction of water flow. The plate-like member 72a allows a water flow that suppresses turbulence of the flow. Flow turbulence includes, for example, conditions in which the flow velocity or pressure fluctuates randomly.

The turbulent water stream flows along the plate member 72a in the current plate 7a, thereby suppressing the flow turbulence and making it easier to flow in the direction in which the plate member 72a extends. As shown in FIG. 10, for example, four plate-like members 72a are provided in the horizontal direction orthogonal to the direction of water flow, but the number of plate-like members 72a is arbitrary.

Since the water intake dust remover Sa has the rectifying plate 7a in this way, the disturbance of the water flow above the upper filter 2 is suppressed, and the water flow above the upper filter 2 is directed in the direction in which the upper bar member 21 extends. can be rectified to flow in a direction parallel to Therefore, in the water intake dust remover Sa, for example, bubbles are less likely to occur in the water stream, thereby improving the water intake efficiency and making it easier to remove the foreign matter X.

[Modification]
FIG. 11 is a diagram showing the configuration of a small hydroelectric power generation system Rb having a water intake dust remover Sb as a modification. FIG. 11(a) is a diagram showing a state of the small hydroelectric power generation system Rb viewed from above. FIG. 11(b) is a side view of the small hydroelectric power generation system Rb. FIG. 12 is a diagram showing the structure of a current plate 7b as a modified example. FIG. 12(a) is a diagram showing the structure of the current plate 7b. FIG. 12(b) is a diagram showing the structure of the current plate 7b and the upper filter 2 as seen from the side.

In the above-described second embodiment, the current plate 7a extends in the horizontal direction orthogonal to the height direction of the water intake dust remover Sa, but the present invention is not limited to this. The straightening plate 7b may extend downward from above in the height direction of the water intake dust remover Sb as it goes from the upstream side to the downstream side of the water flow.

As shown in FIG. 12(a), the current plate 7b has a flat plate portion 71b and a plate member 72b. The flat plate portion 71b extends downward in the height direction of the water intake dust remover Sb from the upstream side to the downstream side of the water flow. The plate member 72b has the same structure as the plate member 72a. The straightening plate 7b is thus inclined downward in the height direction of the water intake dust remover Sb as it goes from the upstream side to the downstream side of the water flow. It can accelerate the water flow flowing from the side to the downstream side. Therefore, the intake water dust remover Sb can increase the speed of the water flow flowing above the intake water dust remover Sb. As a result, the water intake dust remover Sb further improves the water intake efficiency and makes it easier to remove the foreign matter X.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist thereof. be. For example, all or part of the device can be functionally or physically distributed and integrated in arbitrary units. In addition, new embodiments resulting from arbitrary combinations of multiple embodiments are also included in the embodiments of the present invention. The effect of the new embodiment caused by the combination has the effect of the original embodiment.

A... First water channel R, Ra, Rb... Small hydroelectric power generation system T... Water intake U... Second water channel V... Generator X... Foreign matter S, Sa, Sb... Water intake dust remover 1 Frame 11 Front frame 12 Left frame 13 Right frame 14 Rear frame 2 Upper filters 21, 21b Upper rod-shaped member 3 Lower filters 31, 31a Lower rod-shaped member 4 Shaft portion 5 Connection portion 51 Concave portion 6 Covers 7a, 7b Straightening plate 71a, 71b... flat plate portions 72a, 72b... plate-like member 8a... base

Claims (6)

an upper filter having a plurality of upper bar-shaped members extending in the direction of water flow;
a lower filter provided below the upper filter, extending in a horizontal direction orthogonal to the direction of the water flow, and having a plurality of lower bar-shaped members having upwardly convex curved surfaces;
has
A cross section of the lower rod-shaped member has an arc, and a straight line connecting both ends of the arc is inclined upward with respect to the direction of the water flow as it goes downstream in the direction of the water flow. Water intake dust remover. The upper rod-shaped member is characterized by having a V-shaped cross section,
The water intake dust remover according to claim 1 . further comprising a shaft portion extending in the horizontal direction;
The shaft portion enables the end of the upper rod-shaped member on the downstream side of the water flow to move with respect to the lower filter,
The water intake dust remover according to claim 1 or 2 . a connecting portion that connects the upper rod-shaped member to the shaft portion in a state where the end portion of the upper rod-shaped member on the downstream side of the water flow is movable with respect to the lower filter;
a cover that covers from above a region of the shaft portion and the connection portion that is in contact with the shaft portion;
characterized by further comprising
The water intake dust remover according to claim 3 . A plate-shaped member extending in the direction of the water flow on the upstream side of the water flow of the plurality of upper rod-shaped members and allowing the water flow to flow while suppressing turbulence of the flow.
The water intake dust remover according to any one of claims 1 to 4 . A water intake dust remover according to any one of claims 1 to 5 ;
a generator that generates power using the water from which foreign matter has been removed by the intake water dust remover;
A small hydroelectric power generation system comprising:

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