JP2016075084A - Water intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water intake device offering high intake efficiency for surface water and reducing a burden of maintenance and management work significantly.SOLUTION: The present invention relates to an intake device 10 for surface water comprising a box-shaped intake device body 12, and an intake screen 16 covering an opening 14 formed from a top side to a front surface of the intake device body 12. A screen part 17 of the intake screen 16 is curved upward and roughly arch-shaped when seen from sideways, and an inflow plate 26 for surface water is provided at a top part of the intake device body 12, the inflow plate projecting forward from a rear surface side. A top edge side of the screen part 17 is placed below the inflow plate 26, and a highest part T of the curved surface of the screen part 17 is at a same level or slightly higher than a surface height of the inflow plate 26.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water intake device suitable for intake of surface water in a valley river in a mountainous area.

  Conventionally, various surface water intake devices have been disclosed (for example, see Patent Document 1). The surface water backside water intake device disclosed in Patent Document 1 supports a water intake screen obliquely downward and downward at the upper surface opening of the water intake main body, and has an inflow receiving plate for surface water that faces the upper portion of the water intake screen. The surface water is formed so as to project to the inflow side of the surface water, and the surface water flowing in from the inflow receiving plate is taken from the water intake screen on the back surface of the water intake device. In addition, water jump prevention guides are arranged on both the left and right sides of the inflow receiving plate, and surface water is taken from the water intake screen on the back of the water intake unit while preventing jumping of the surface water flowing in from the inflow receiving plate with the water jump prevention guide. It is characterized by being configured as described above.

Japanese Patent No. 3075928

  According to the back surface water intake device disclosed in Patent Document 1, water can be taken not from the front side of the river surface water flow, but from the back side of the river surface water flow. Since the surface water can be taken from the back surface of the water intake screen while flowing out, it is described that the troublesome maintenance work of the water source can be greatly eliminated.

  Moreover, in the back surface water intake device of surface water disclosed in Patent Document 1, by providing the water jump prevention guides at the left and right side positions of the inflow receiving plate, the water surface flows toward the water intake screen while preventing the water surface flow water from jumping. It is described that it functions to form a water flow, thereby preventing a decrease in water intake capacity due to a change in the flow velocity of river surface water, and bringing about various effects such as the intended water intake performance being constantly demonstrated.

  Certainly, when the intake screen is supported obliquely backward and downward as in the surface water intake device disclosed in Patent Document 1, there is almost no risk of fallen leaves etc. being caught on the intake screen. Even if it accumulates, etc., if the flow rate of surface water increases, it can be swept away by the water pressure, so the maintenance work of the water intake device can be greatly reduced.

  However, if the intake screen is supported obliquely backward and downward with the same slope as the inflow receiving plate, most of the surface water flowing on the inflow receiving plate will flow down the surface of the intake screen, resulting in stable surface water. Water intake is difficult.

  In addition, if the water jump prevention guides are disposed on the left and right sides of the inflow receiving plate, there is a possibility that dead leaves, driftwood and the like are likely to accumulate between the inflow receiving plate and the water jump preventing guide. In particular, if dead leaves, driftwood, etc. get caught between the inflow receiving plate and the jump prevention guide, it will be difficult to push away with surface water pressure, and dead leaves will accumulate further, making it difficult to finally take up surface water. Therefore, regular maintenance work is required.

  Therefore, in view of the above problems, the inventors of the present application have made extensive studies to provide a water intake device that has high surface water intake efficiency and can greatly reduce maintenance work, and as a result, has reached the present invention. .

  That is, the present invention is a surface water intake device comprising a box-shaped water intake device main body and a water intake screen disposed so as to cover an opening formed from the upper side to the front surface of the water intake device main body. The water intake screen has a substantially arcuate shape in a side view bent upward, and includes an inflow plate of surface water that protrudes forward from the back side at the top of the water intake device body, The upper end side is disposed below the inflow plate, and the highest portion of the curved surface of the screen portion is located at or slightly above the surface height of the inflow plate.

  Moreover, the water intake apparatus of this invention WHEREIN: The height difference of the screen surface in the upper end side of the said screen part and the surface of the said inflow plate is 8-20 mm, It is characterized by the above-mentioned.

  Furthermore, in the water intake device of the present invention, a difference in height between the highest portion of the curved surface of the screen portion and the surface of the inflow plate is 0 to 10 mm.

  In the water intake apparatus of the present invention, the water intake screen is detachable from the water intake apparatus main body.

  According to the water intake device of the present invention, water can be stably taken regardless of the flow rate of surface water. Moreover, even if dead leaves, driftwood, etc. accumulate on the intake screen, they are pushed downstream by the surface water flow from the upstream side, so the maintenance work of the intake device can be greatly reduced.

  In addition, by configuring the water intake screen according to the water intake device of the present invention so as to be detachable from the water supply device main body, it can be easily replaced when the water intake screen is damaged.

It is a front view of the water intake device which concerns on one Embodiment of this invention. It is a top view of the water intake apparatus shown in FIG. It is the sectional view on the AA line in FIG. In the water intake apparatus shown in FIG. 1, (a) shows that the highest part of the curved surface of the screen part is the same as the surface height of the inflow plate, and (b) shows that the highest part of the curved surface of the screen part is the surface height of the inflow plate. It is principal part sectional drawing which shows the case where it is located slightly upwards.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view showing a water intake device 10 according to an embodiment of the present invention, FIG. 2 is a plan view of the water intake device 10, and FIG. 3 is a cross-sectional view taken along line AA of the water intake device 10 shown in FIG. It is. As shown in FIGS. 1 to 3, the water intake device 10 according to the present embodiment is disposed so as to cover a box-shaped water intake device main body 12 and an opening 14 formed from above the water intake device main body 12 to the front surface. The intake screen 16 is configured to be included.

  The water intake device main body 12 according to the water intake device 10 of the present embodiment includes a left and right side plates 21 and 22, a front plate 23 disposed at a lower front portion between both side plates 21 and 22, and both side plates 21 and 22. A front plate that protrudes forward from the upper end of the back plate 24 at the back plate 24 disposed at the rear, the bottom plate 25 disposed below the both side plates 21 and 22, and the upper portion between the both side plates 21 and 22. It is formed in a box shape by the inflow plate 26 of running water. An opening 14 is formed between the side plates 21 and 22 between the upper edge 23a of the front plate 23 and the front edge 26a of the inflow plate 26.

  The water intake screen 16 according to the water intake device 10 of the present embodiment is disposed so as to cover the opening 14 formed in the water intake device main body 12. As shown in FIG. 3, the water intake screen 16 is provided with a screen portion 17 for taking surface water, an insertion portion 18 extended from the upper edge side of the screen portion 17, and a lower edge side of the screen portion 17. And the mounting portion 19.

  The screen portion 17 related to the water intake screen 16 has a generally arcuate shape bent upward. Then, by arranging the upper end 17a side of the screen portion 17 below the inflow plate 26, the screen surface on the upper end 17a side of the screen portion 17 related to the water intake screen 16 becomes the inflow surface of the surface water related to the inflow plate 26 ( It will be located below the surface of the inflow plate 26). That is, a height difference h is formed between the screen surface on the upper end 17a side of the screen portion 17 and the surface of the inflow plate 26, and this height difference h causes resistance to the surface water, forcing the water intake device main body 12. Make surface water flow in.

  Furthermore, in the water intake device 10 of the present embodiment, the highest portion T of the curved screen surface (= curved curved surface) of the screen portion 17 related to the water intake screen 16 is set to the same height as the surface of the inflow plate 26. Yes. That is, the screen portion 17 is gradually bent upward from the upper end 17a side to the highest portion T, and is bent downward from the highest portion H, so that the screen portion 17 as a whole has a substantially arcuate shape in side view. ing.

  The water intake device 10 of the present embodiment having the above-described configuration is installed in a recess such as a dam provided in a water source such as Tanikawa, and takes in surface water stored on the upstream side of the dam to the water intake device 10 to take in the water intake screen. Water is taken from 16 into the water intake device main body 12. More specifically, the surface water that has flowed from the upstream side of the installation location of the water intake device 10 is a table formed by the side plates 21 and 22 and the inflow plate 26 that constitute the water intake device body 12 of the water intake device 10. The surface water flowing into the flowing water inflow path R and reaching the intake screen 16 from the inflow plate 26 flows into the intake device main body 12 from the screen portion 17.

  Here, in the water intake device 10 of the present embodiment, a height difference h is formed between the screen surface on the upper end 17a side of the screen portion 17 and the surface of the inflow plate 26, and the screen portion 17 is further bent. Since the highest portion T of the screen surface (= curved surface) is set to the same height as the surface of the inflow plate 26, resistance occurs in the surface water that flows in from the inflow plate 26 and reaches the screen portion 17, Of course, the flow rate of flowing water is large, but even when the flow rate is small, water can be actively taken from the screen portion 17 into the water intake device main body 12 stably.

  In addition, from the surface water inflow route R formed by the side plates 21 and 22 and the inflow plate 26 related to the water intake device main body 12 to the water intake screen 16, the structure is such that dead leaves and the like are hardly deposited in the first place. Even when the flow rate is small and dead leaves or the like are accumulated near the upper end 17a of the screen portion 17, if the flow rate of surface water increases, it can be easily washed away by the water pressure. As a result, the maintenance work such as the removal of dead leaves becomes almost unnecessary, and the maintenance cost can be greatly reduced.

  In FIG. 1 and FIG. 3, reference numeral 32 denotes a mud outlet, and a plug (not shown) is screwed into the mud outlet 32. Sand and mud contained in the surface water flowing into the water intake main body 12 can be discharged out of the water intake main body 12 from the mud outlet 32 by removing the plug (not shown).

  1 to 3, reference numeral 34 denotes a water intake pipe, and surface water flowing from the water intake pipe 34 into the water intake apparatus main body 12 can be introduced to a target location. In the present embodiment, the intake pipe 34 is connected to the side plate 21 side, but the place to which the intake pipe 34 is connected is not particularly limited, and the side plate 22 side according to the installation location of the intake device 10. Or the front plate 23 side or the like.

  As mentioned above, although the water intake apparatus 10 which concerns on one Embodiment of this invention was explained in full detail, it is preferable that the water intake screen 16 which concerns on the water intake apparatus 10 is detachable with respect to the water intake apparatus main body 12. FIG. As shown in FIG. 3, a water intake screen receiving plate 31 projecting forward from the back plate 24 is provided below the inflow plate 26 between the side plates 21 and 22 of the water intake device main body 12, and this water intake screen receiving plate 31 is further provided. Guide plates 30 and 30 that are bent obliquely downward from the both ends of the two are provided on both side plates 21 and 22, respectively.

  When the water intake screen 16 is attached to the opening 14 related to the water intake device main body 12, the insertion portion 18 related to the water intake screen 16 is slid upward in a state where the water intake screen 16 is in contact with the guide plates 30 and 30, so that the insertion portion 18 is inserted between the inflow plate 26 and the water intake screen receiving plate 31. And the attachment part 19 which concerns on the water intake screen 16 can be easily attached by fixing to the latching | locking part provided in the front plate 23 which concerns on the water intake apparatus main body 12 with a volt | bolt and a nut.

  In this way, by configuring the water intake screen 16 so as to be detachable from the water main body 12, the water intake screen 16 can be easily replaced when the water intake screen 16 is damaged. Moreover, also when cleaning the inside of the water intake apparatus main body 12, work efficiency can be improved significantly by removing the water intake screen 16. FIG. Furthermore, by providing the guide plates 30 and 30 on the side plates 21 and 22, the water intake screen 16 can be easily attached and detached.

  As mentioned above, although embodiment of the water intake apparatus of this invention was explained in full detail, it should not be understood that the technical idea of this invention is limited substantially. For example, in the water intake device 10 of the present embodiment, if a height difference h is provided for the height difference h between the screen surface on the upper end 17a side of the screen portion 17 and the surface of the inflow plate 26 associated with the water intake device body 12, the value is Although not particularly limited, the height difference h is preferably 8 to 20 mm, and particularly preferably 10 to 15 mm in consideration of water intake efficiency and prevention of accumulation of fallen leaves and the like. If the height difference h is less than 8 mm, since the resistance generated in the surface water is small, the water intake efficiency is lowered, and it may be difficult to stably take in the surface water. Further, if the height difference h exceeds 20 mm, fallen leaves and the like are likely to accumulate near the upper end 17a of the screen portion 17, and the water intake efficiency decreases and the burden of maintenance work increases.

  Moreover, in the water intake apparatus 10 of the said embodiment, the highest part T of the curved screen surface (= curved curved surface) of the screen part 17 which concerns on the water intake screen 16 is shown in FIG. Although it is set to the same height as the surface, it is more preferable that the highest portion T is located slightly above the surface height of the inflow plate 26 as shown in FIG. Specifically, the height difference H between the highest portion T of the screen surface (= curved surface) of the screen portion 17 and the surface of the inflow plate 26 is preferably 0 to 10 mm, particularly 3 to 7 mm. preferable. When the height difference H is less than 0 mm, that is, when the highest portion T of the screen surface (= curved surface) of the screen portion 17 is located below the surface height of the inflow plate 26, resistance to the surface water flowing from the inflow plate 26 hardly occurs. Therefore, surface water flows down the screen surface of the screen part 17, and water intake efficiency falls significantly. On the other hand, when the height difference H exceeds 10 mm, the water intake efficiency is improved, but dead leaves and the like are easily deposited, or the screen surface of the screen portion 17 is worn by gravel contained in surface water, and the screen portion 17 Since the cross section becomes thin, it is difficult to reduce the burden of maintenance work.

  As described above, the present invention can be carried out without departing from the gist thereof, with appropriate improvements, changes or additions based on the ingenuity and ingenuity of those skilled in the art.

10: Water intake device 12: Water intake device main body 14: Opening portion 16: Water intake screen 17: Screen portion 18: Insertion portion 19: Mounting portion 21, 22: Side plate 23: Front plate 24: Back plate 25: Bottom plate 26: Inflow plate 30: Guide plate 31: Intake screen receiving plate 32: Drain port 34: Intake pipe h: Height difference between the screen surface and the inflow plate surface on the upper end side of the screen portion H: The highest portion of the screen surface of the screen portion and the inflow plate Difference in height from the surface

Claims (4)

A surface water intake device comprising a box-shaped water intake device main body, and a water intake screen disposed so as to cover an opening formed from the upper side to the front surface of the water intake device main body,
The screen portion of the water intake screen has a generally bow shape in a side view bent upward,
In the upper part of the water intake device body, provided with an inflow plate of surface water that protrudes forward from the back side,
The upper end side of the screen portion is disposed below the inflow plate, and the highest portion of the curved surface of the screen portion is located at or slightly above the surface height of the inflow plate. apparatus.   The water intake device according to claim 1, wherein a height difference between a screen surface on an upper end side of the screen portion and a surface of the inflow plate is 8 to 20 mm.   The water intake device according to claim 1 or 2, wherein a difference in height between the highest portion of the curved surface of the screen portion and the surface of the inflow plate is 0 to 10 mm. The water intake device according to any one of claims 1 to 3, wherein the water intake screen is detachable from the water intake device main body.

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