JP2003055943A - Selective intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a selective intake device capable of improving the intake performance while miniaturizing in a simple structure. SOLUTION: This device comprises a selective intake mechanism 5 allowing a selective intake by raising the top pipe 11 of a laminated pipe 10 through a lifting beam 26 and a connecting tool 21 by use of a lifting mechanism 50, thereby successively separating each pipe 11-14 of a laminated pipe 10 from above while regulating the separating distance by connecting tools 22-25 to successively form openings M from above to under.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selective water intake device that enables selective water intake from the surface layer according to the water storage level of a dam or the like.

[0002]

As a selective water intake device of this type, for example,
Japanese Utility Model Publication No. 60-16661 (conventional example 1) discloses a door body having a plurality of stages vertically facing the water guiding direction of the water intake portion.
Connection means for arranging them in a row and interposing a common connecting member between vertically adjacent door bodies so that an opening of a desired size is formed between these door bodies; It is disclosed that a hoisting means for hoisting the door body is provided, and it is possible to selectively take water from the surface layer according to the water storage level.

Specifically, as shown in FIG. 8, this selective water intake device has a plurality of doors 91a, 91b, which are vertically arranged.
91c ... Are connected to each other by the connecting members 97a, 97b, 97c.
A wire rope 95 is attached via 7o, and the wire rope 95 is taken up by a hoisting device (not shown) so that the door group is lifted.

In FIG. 8 (a), a group of door bodies 91a, 91b, 91c, etc. hang down in a row in the water-conducting direction of the water intake portion facing the dam body 96 to block water, and the uppermost door body 91a and the water surface. Between the first opening Oo and the outlet pipe 98
Have been derived to.

When the hoisting device is driven to wind up the wire rope 95, as shown in FIG.
a is lifted up and down so that it can be freely moved up and down.
The first connector 97a that is loosely connected to connect the second door body 91
By moving in b, a new opening Oa is formed, and water is taken from here.

When the wire rope 95 is further wound up,
As shown in FIG. 8C, the same action occurs in the third door body 91c, and the second connecting member 97b is lifted up to open a new opening O.
b is formed. There are two openings in the water intake in the water, but due to the difference in density depending on the water depth, water is selectively taken from the openings Ob located in the lower layer.

As described above, in this selective water intake device, the doors 91a, 91b, 91c ... Arranged in one row are sequentially lifted from the upper one to form an opening between the doors, and the opening located in the lower layer. Water can be selectively taken from the parts by utilizing the density difference.

As another form, there is a multi-stage selective water intake device in which a multi-stage pipe in which cylindrical pipes having different diameters are stacked in a telescope shape is configured to be expandable and contractible. In this multi-stage selective water intake device, it is possible to perform selective water intake of the surface layer by expanding and contracting the multi-stage pipe so that the intake port provided in the uppermost pipe is at the water storage level (conventional example 2). ).

[0009]

However, in the above-mentioned conventional example 1, the both side portions of each plate-shaped door body arranged in one row in the vertical direction are guided by the guide groove, and the space between each door body and the guide groove is increased. While maintaining the watertight state by the seal member interposed in the
An opening is formed between the doors in order from the top. Therefore, if the door body is enlarged and the opening is expanded to improve the water intake capacity, the plate-shaped door body receives high water pressure, so it is possible to smoothly move each door body up and down while maintaining the watertight state. It gets harder. Therefore, in order for the selective water intake device of this structure to function properly, the size of the opening may be limited, which may cause a problem of insufficient water intake capacity.

In the above-mentioned conventional example 2, since the multi-stage pipe in which the cylindrical pipes having different diameters are superposed in a telescope shape is configured to be expandable and contractible, the pipe diameters of the respective pipes constituting the multi-stage pipe increase as the pipe diameter decreases. Since it is necessary to increase the pipe diameter of the uppermost pipe to secure a large intake port while widening the upper and lower water intake ranges in order to increase the water intake capacity, the outer diameter of the lowermost pipe becomes large. Then, there is a possibility that a problem that the entire facility becomes large may occur.

The present invention solves the problems of the prior art, and an object of the present invention is to provide a selective water intake device capable of improving the water intake capacity while achieving downsizing with a simple structure.

[0012]

The selective water intake device of the present invention comprises a stacking pipe in which a plurality of pipes having substantially the same cross-sectional shape are stacked in a watertight state, and a stacking pipe connected to a lower portion of the stacking pipe. A lead-out pipe for leading out the water introduced to the outside of the stacking pipe, a connecting tool for connecting the pipes constituting the stacking pipe so as to be separable and for controlling the separation distance of each pipe, and the stacking pipe. Elevating means for elevating and lowering the uppermost pipe, and by elevating the uppermost pipe of the stacking pipe by using the elevating and lowering device, the pipes are separated from each other in order from the top while the separation distance is regulated by the connecting tool. A selective water intake mechanism is formed that sequentially forms openings from top to bottom to enable selective water intake.

Here, the term "tubes having substantially the same cross-sectional shape" is meant to include all frame bodies that are stacked in a watertight state. For example, the horizontal cross-sectional shape of the frame bodies is not limited to a ring, but other shapes such as polygons. Is meant to include.

According to the above construction, when the uppermost pipe of the stacking pipe is raised by using the elevating means, the respective pipes are separated from each other in order from the top while the separation distance is regulated by the connecting tool, and the openings are opened from the top to the bottom. It is formed sequentially. Therefore, it is possible to selectively take in water in the surface layer by changing the position of the opening according to the water storage level and to lead the water introduced into the stacking pipe to the outside of the stacking pipe by the outlet pipe.

Moreover, since the tubes are separated from each other on the basis of the separation distance regulated by the connector, the opening formed thereby is largely formed on the outer peripheral portion of the stacking tube over the entire circumference.
The water intake capacity is improved, and a large amount of water can be taken efficiently in a short time.

In the above-mentioned selective water intake device, if the inside of the pipe is partitioned by the straightening vane, the water flowing into the pipe through the opening flows down while hitting the straightening vane, so that stable water intake in a straightening state is possible without forming a vortex. Becomes

In the above-mentioned selective water intake device, when each pipe constituting the stacking pipe is guided to be vertically movable by the guide member provided in the pipe, the guide member is arranged in the pipe of the stacking pipe. In addition, it is possible to reduce the size of the structure with a simple structure while ensuring the required structural strength.

Further, in the above-mentioned selective water intake device, if each pipe constituting the stacking pipe is guided to be vertically movable by a guide member provided outside the pipe, the guide member is provided outside the stacking pipe. Since they are arranged, it is possible to increase the area of the flowing water portion in the stacking pipe.

Further, in the above-mentioned selective water intake device, when the screen member for covering the opening is provided in the stacking pipe, it is provided in the stacking pipe when the surface water is selectively taken in according to the stored water level. Since the opening is covered by the screen member provided, dust and the like do not enter the stacking pipe.

Further, in the above-mentioned selective water intake device, when the sealing member is provided at the end portion of the pipe, a sealing member seals between the pipes of the stacking pipe in which a plurality of pipes are stacked. Therefore, the watertight state is reliably maintained.

Further, in the above-mentioned selective water intake device, if the whole stacking pipe is configured to be separable from the installation surface and can be raised and lowered by the elevating means, the whole stacking pipe is inspected from the installation position by the elevating means. It is possible to perform inspection by pulling it up to the position, improving the workability of maintenance of the selective water intake device.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show a configuration example of a selective water intake device 1 according to a first embodiment of the present invention.

As shown in FIG. 1, this selective water intake device 1 has a stacking pipe 10 erected on the bottom of the water, and the uppermost part of the stacking pipe 10 is mounted on a supporting member 3 which extends from the upper part of the dam bank 2. An elevating mechanism 50 that elevates and lowers the pipe 11 of FIG. Also, the stacking tube 10
A pillar 51, which is a guide member, is erected at the center of the stacking pipe, and the upper end of the pillar 51 is fixed to the lower portion of the support member 3.
Each of the tubes 11 to 14 constituting the above is guided by a column 51 and can be moved up and down. Then, the uppermost pipe 11 of the stacking pipe 10 is lifted through the lifting beam 26 and the connecting member 21 by using the elevating mechanism 50, so that the pipes 11 to 14 are connected to the connecting members 22 to 25 in order from the top. The selective water intake mechanism 5 is configured to allow selective water intake by sequentially forming the openings M from top to bottom while restricting the separation distance with. Using this selective water intake mechanism 5, the surface water is selectively taken in by changing the position of the opening M in accordance with the water level WL.
The water introduced into the stacking pipe 10 can be led out of the stacking pipe 10 by the outlet pipe 30.

More specifically, the stacking tube 10 is stacked in a watertight state by a sealing member (not shown) provided with five tubes 11 to 15 having substantially the same cross-sectional shape at their ends. Guide bushes 11c to 14c, which are guide members, are provided at the center of each of the tubes 11 to 14.
4 is guided by a column 51 standing upright in the central portion of the stacking tube 10 via guide bushes 11c to 14c, and is configured to be slidable in the vertical direction.

The pipes 11 to 15 constituting the stacking pipe 10 are connected to each other by connecting members 22 to 25 so that the pipes 11 to 15 can be separated from each other, and the separation distance between the pipes 11 to 15 is regulated to a prescribed value d. Are formed. Specifically, the connecting members 22 to 25 are made of bolts having male threads formed on both ends, and one end of the connecting member 22 is fastened and fixed to the lower connecting portion 11b of the pipe 11 by two nuts. , The other end has one nut fastened to the insertion hole of the upper coupling portion 12a of the pipe 12 while being inserted from above, and the connector 2 that moves between the insertion holes of the upper coupling portion 12a.
2 uses the nut as a stopper so that the pipe 1
The distance between 1 and the tube 12 is regulated to a prescribed value d so that a predetermined opening M is formed. Similarly, the connector 2
One end of 3 (24, 25) is fastened and fixed to the lower connecting portion 12b (13b, 14b) of the pipe 12 (13, 14) by two nuts, while the other end is fixed to the pipe 13 (14, 1).
One nut is fastened to the end of the upper connecting portion 13a (14a, 15a) of 5) in a state of being inserted from above. The nuts of the coupling tools 23 (24, 25) that move between the insertion holes of the upper coupling portions 13a (14a, 15a) serve as stoppers so that the pipe 12 (1
3, 14) and the separation distance between the pipe 13 (14, 15) are regulated to a prescribed value d so that a predetermined opening M is formed.

Further, as shown in FIG. 3, a screen member 31 in which a plurality of rods are suspended in a cylindrical shape along the outer periphery of each pipe 11 (12, 13, 14) of the stacking pipe 10 is formed. Is fixed, and the lower end of the screen member 31 covers the upper outer circumference of the lower pipe 12 (13, 14, 15). Also, a screen member 31 in which a plurality of rods are hung in a cylindrical shape along the outer circumference of the pipe is fixed to the lower part of the pulling beam 26.
The lower end of the tube covers the upper outer circumference of the lower tube 11. Thus, when the surface water is selectively taken according to the water storage level, each opening M is covered with the screen member 31 to prevent dust and the like from entering the stacking pipe 10.

Further, as shown in FIG. 2, each guide bush 11c (12c, 13c, 14c) and tube 11 (12, 1).
3, 14) between the inner wall of the four straightening vanes 41 (42,
43, 44) are evenly distributed to divide the inside of the pipe. This is because the water flowing into the stacking pipe 10 from the opening M flows down while hitting the flow straightening plates 41 to 44, and the water flowing down inside the pipe does not become a vortex and is in a flow straightening state so that stable water intake is achieved. This is to make it possible.

As shown in FIG. 1, the lifting mechanism 50 includes a fixed pulley 54 mounted on the support member 3 and a moving pulley 52 mounted on the pulling beam 26. One end of the wire rope 53, which is U-shaped by being suspended, is fixed on the support member 3, and the other end is connected to the fixed pulley 54. This fixed pulley 54
By rotating, the moving pulley 52 is moved up and down, and the lifting beam 26 can be moved up and down.

Although not shown, the stacking tube 10 is constructed so that it can be separated from the installation surface, and can be raised and lowered by an elevating mechanism 50. This is to raise the entire stacking pipe 10 from the installation position to the inspection position by the elevating mechanism 50 so that inspection can be performed, thereby improving workability during maintenance of the selective water intake device 1.

In the selective water intake device 1, as shown in FIG. 3 (a), when the storage level ML1 is full, the surface layer is opened from the opening M1 between the lifting beam 26 and the uppermost pipe 11. This water is selectively taken and introduced into the stacking pipe 10, and this water is led out of the stacking pipe 10 by a lead-out pipe 30 connected to the lower part of the stacking pipe 10.

When the water storage level is ML2 (<ML1), FIG.
As shown in (b), by using the elevating mechanism 50 to raise the uppermost pipe 11 of the stacking pipes 10 in the selective water intake mechanism 5, the connecting tool 22 fixed to the lower connecting portion 11b of the pipes 11 is connected. Move up together, until the nut at the lower end of the connector 22 hits the lower surface of the upper connecting part 12a of the second pipe 12, the connecting device 22 moves between the insertion holes of the upper connecting part 12a, and the uppermost pipe 11 and the second pipe 12 are separated from each other by a prescribed distance d to form a predetermined opening M2.
Surface water from 2 is selectively taken.

When the water storage level is ML3 (<ML2), FIG.
As shown in (c), by using the elevating mechanism 50 to raise the second pipe 12 of the stacking pipe 10 in the selective water intake mechanism 5, the connecting member 23 fixed to the lower connecting portion 12b of the pipe 12 is connected. Rise together, until the nut at the lower end of the connecting tool 23 hits the lower surface of the upper connecting portion 13a of the third pipe 13,
The connecting member 23 moves between the insertion holes of the upper connecting portion 13a,
The separation distance between the second pipe 12 and the third pipe 13 is regulated to a specified value d to form a predetermined opening M3, and the surface water is selectively taken in through the opening M3.

When the water storage level is ML4 (<ML3), FIG.
As shown in (d), the elevating mechanism 50 is used to raise the third pipe 13 of the stacking pipe 10 in the selective water intake mechanism 5 to thereby fix the connecting member 24 fixed to the lower connecting portion 13b of the pipe 13. Rise together, until the nut at the lower end of the connecting tool 24 hits the lower surface of the upper connecting portion 14a of the fourth pipe 14,
The connection tool 24 moves between the insertion holes of the upper connection part 14a,
The separation distance between the third pipe 13 and the fourth pipe 14 is regulated to the specified value d to form a predetermined opening M4, and the surface water is selectively taken in through the opening M4.

When the water storage level is ML5 (<ML4), although not shown, the separation distance between the fourth pipe 14 and the fifth pipe 15 is regulated to a prescribed value d in the same manner as above, but a predetermined opening is established. M
5 is formed, and the surface water is selectively taken in through this opening M5.

As described above, in the selective water intake device 1, the uppermost pipe 11 of the stacking pipe 10 is raised by using the elevating mechanism 50 of the selective water intake mechanism 5, and the pipes 11 to 15 are connected in order from the top. 22 to 25 are arranged to regulate the separation distance so that the openings M are sequentially formed from top to bottom. By changing the position of the openings M in accordance with the water storage level, the surface water is selectively taken in and stacked. The water introduced into the pipe 10 can be led out of the stacking pipe 10 by the lead-out pipe 30.

Moreover, the pipes 11 to 15 are separated from each other based on the separation distance d regulated by the connecting members 22 to 25, and the opening M formed thereby is formed in the outer peripheral portion of the stacking pipe 10 to be large over the entire circumference. In this way, it is possible to improve the water intake capacity and efficiently take a large amount of water in a short time.

The inside of each of the tubes 11 to 15 is provided with straightening vanes 41 to 4
Each is divided by 4, and the water flowing into the pipe from the opening M is allowed to flow down while hitting the flow straightening plates 41 to 44, so that the water flowing down does not become a vortex and is in a flow straightened state, which enables stable water intake. I am trying.

Further, each of the tubes 11 to 1 constituting the stacking tube 10
5 is guided to be vertically movable by a column 51 provided in the pipe, and the selective water intake device 1 has a simple structure and is downsized while ensuring a structurally required strength.

Further, when the opening M is covered by the screen member 31 provided on each of the pipes 11 to 15 of the stacking pipe 10, the stacking pipe is selected when the surface water is selectively taken in accordance with the stored water level WL. It is designed so that dust and the like does not enter inside 10.

(Second Embodiment) FIGS. 4 and 5 show a configuration example of a selective water intake device 1B according to a second embodiment of the present invention.

The selective water intake device 1B differs from the selective water intake device 1 of the first embodiment described above in that the guide member is arranged outside the stacking pipe, and the other structure is the first.
The embodiment is substantially the same as the embodiment.

As shown in FIG. 4, this selective water intake device 1B has a stack pipe 10B erected on the bottom of the water and a dam bank 2
An elevating mechanism 50 that elevates and lowers the uppermost tube 16 of the stacking tube 10B via the beam 26 for pulling up and the connecting tool 21 is fixed to the support member 3 protruding from the upper part of the. Further, columns 55 and 56, which are guide members, are erected outside the stacking pipe 10B, and the upper ends thereof are fixed to the lower part of the supporting member 3, so that the pipes 16 to 19 that form the stacking pipe 10B are fixed. Posts 55, 56
It is guided outside the pipe and can be moved up and down. Then, the uppermost pipe 16 of the stacking pipe 10B is lifted through the lifting beam 26 and the connecting member 21 by using the elevating mechanism 50, so that the pipes 16 to 19 are connected in order from the top.
The selective water intake mechanism 5B is configured such that the openings M are sequentially formed from top to bottom while the separation distance is regulated by 24 to 24 to allow selective water intake. By using this selective water intake mechanism 5B, the water in the surface layer is selectively taken by changing the position of the opening M in accordance with the water storage level WL, and the water introduced into the stacking pipe 10B is taken out by the outlet pipe 30B. It can be outsourced.

More specifically, as shown in FIG. 5, the stacking tube 10B is arranged at the center of a prismatic space surrounded by the side wall 57 having a U-shaped cross section and the dam bank 2. The side wall 57 is configured to be water-permeable, and each of the three side walls 57a, 57b, 57 has three screen members 32 for preventing invasion of dust and the like.
It is fixed on the entire surface of c so that water can be taken in while removing dust and the like. Opposing side walls 57b, 57c
Columns 55 and 56, which are guide members provided upright outside the stacking tube 10B, are fixed to the. Guide rails 16a to 19a and 16b to 19b, which are guide members, are formed on the outer periphery of each of the pipes 16 to 19 constituting the stacking pipe 10B so as to project therefrom. The rails 16a to 19a and 16b to 19b are engaged with each other so that the rails 16a to 19a and 16b to 19b are guided outside the pipe and can be moved up and down.

In this selective water intake device 1B, the support columns 55 and 56 as guide members and the guide rails 16a to 19a and 16 are provided.
b to 19b are arranged outside the stacking tube 10B, and the stacking tube 1
It is possible to increase the area of the running water portion within 0B. In addition, also by this selective water intake device 1B, similarly to the above-described selective water intake device 1, by changing the position of the opening M in accordance with the water storage level WL, the surface water is selectively taken in,
The water introduced into the stacking pipe 10B can be led out of the stacking pipe 10B by the outlet pipe 30B.

Next, a modified example 1C of the selective water intake device 1B described above will be described with reference to FIG.

The selective water intake device 1C is different from the above-described selective water intake device 1B in that the entire stacking pipe 10B is configured to be separable from the installation surface and can be moved up and down by an elevating mechanism 50. The configuration is similar to that of the second embodiment.

That is, in the selective water intake device 1C, the operation tower 58 is raised, the pedestal 57 for raising is fixed on the support member 3 protruding from the upper part of the dam bank 2, and the lifting mechanism 50 is mounted thereon. And constitutes the selective water intake mechanism 5C.
The elevating mechanism 50 allows the entire stacking tube 10B to be pulled up from the installation position to the inspection position on the ground for inspection, thereby improving workability in maintenance of the selective water intake device 1C.

(Third Embodiment) FIG. 7 shows a selective water intake device 1D in which a stacking pipe according to the present invention is formed below a conventional multi-stage selective water intake device in order to improve bottom water intake.

This selective water intake device 1D includes a multi-stage selective water intake mechanism 5D in which a multi-stage pipe in which cylindrical pipes having different diameters are stacked in a telescope shape is expandable, and three pipes 33, 34, The stacking pipe type selective water intake mechanism 5E is formed by stacking 35 in a watertight state.

In this selective water intake device 1D, at the normal water level, the multi-stage selective water intake mechanism 5D expands and contracts the multi-stage pipe so that the intake port provided in the uppermost pipe comes to the water storage level, so that the selective water intake of the surface layer is performed. On the other hand, when the water level falls near the bottom of the water, the stacking pipe type selective intake mechanism 5E
Select water intake by. Specifically, in the water storage level WL6 shown in FIG. 7A, water is taken in through the opening M6 between the pipe 33 and the pipe 34, and in the water storage level WL7 (<WL6) shown in FIG. Between the pipes 35 and the bottom of the water at the water level WL8 (<WL7) shown in FIG. 7 (c).

Thus, in this selective water intake device 1D,
We are trying to improve bottom water intake, which was difficult with the conventional multi-stage selective water intake device.

The selective water intake device according to the present invention is not limited to the specific constitution of each of the above-mentioned embodiments.
It goes without saying that the configuration may be appropriately modified, added, replaced, or deleted as necessary.

For example, the number of tubes forming the stacking tube in each embodiment is not limited to the above. Further, the cross-sectional shape of the pipe is not limited to the annular shape, and may be any frame that can be stacked in a watertight state, and may have another shape such as a polygon. Further, the longitudinal dimensions of the tubes forming the stacking tube do not necessarily have to be the same, and can be changed as appropriate.

Further, in the above, an example of the structure in which four straightening vanes are provided in each pipe forming the stacking pipe has been shown, but the present invention is not limited to this, and 1, 2, 3 in each pipe. Alternatively, five or more straightening vanes may be provided. Note that the flow straightening plate may be omitted if no eddy current is generated.

[0056]

As described above, according to the selective water intake device of the present invention, when the uppermost pipe of the stacking pipes is lifted by using the elevating means, the pipes are separated by the connecting tool in order from the top. As the distance is regulated and the openings are formed sequentially from top to bottom, the surface water is selectively taken by changing the position of the openings according to the reservoir level, and the water introduced into the stacking pipe is discharged. Can be led out of the stacking pipe.

Moreover, since the tubes are separated from each other based on the separation distance regulated by the connecting tool, and the opening formed thereby is formed large over the entire circumference on the outer peripheral portion of the stacking tube.
The water intake capacity is improved, and a large amount of water can be efficiently taken in a short time.

In the above-mentioned selective water intake device, if the inside of the pipe is partitioned by the straightening vane, the water flowing into the pipe from the opening flows down while hitting the straightening vane, so that it does not become a vortex and stable water intake in a straightening state is performed. be able to.

In the above-mentioned selective water intake device, when each pipe constituting the stacking pipe is guided to be vertically movable by the guide member provided in the pipe, the guide member is arranged in the pipe of the stacking pipe. It is possible to reduce the size by simplifying the structure while ensuring the required structural strength.

Further, in the selective water intake device, when each pipe constituting the stacking pipe is guided to be vertically movable by the guide member provided outside the pipe, the guide member is provided outside the stacking pipe. Since they are arranged, the area of the flowing water portion in the stacking pipe can be made large, so that the water intake capacity can be improved.

Further, in the above-mentioned selective water intake device, if the screen member for covering the opening is provided in the stacking pipe, it is provided in the stacking pipe when the surface water is selectively taken in according to the stored water level. Since the opening is covered by the screen member thus provided, it is possible to prevent dust and the like from entering the stacking pipe.

Further, in the above-mentioned selective water intake device, when the seal member is provided at the end portion of the pipe, a sealing member seals between the pipes of the stacking pipe in which a plurality of pipes are stacked. Therefore, the watertight state of the stacking pipe can be reliably maintained.

In the selective water intake device, if the whole stacking pipe is configured to be separable from the installation surface and can be raised and lowered by the elevating means, the whole stacking pipe is inspected from the installation position by the elevating means. The inspection can be performed by pulling it up to the position, and the workability of the maintenance of the selective water intake device can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration example of a selective water intake device that is a first embodiment according to the present invention.

FIG. 2 is a top view showing a configuration example of the selective water intake device according to the first embodiment of the present invention.

FIG. 3 is a side view showing a state when performing selective water intake in the selective water intake device according to the first embodiment of the present invention.

FIG. 4 is a side sectional view showing a configuration example of a selective water intake device which is a second embodiment according to the invention.

FIG. 5 is a top view showing a configuration example of a selective water intake device according to a second embodiment of the present invention.

FIG. 6 is a side sectional view showing a modified example of the selective water intake device according to the second embodiment of the present invention.

FIG. 7 is a side sectional view showing a configuration example of a selective water intake device which is a third embodiment according to the present invention.

FIG. 8 is a side sectional view showing a configuration example of a conventional selective water intake device.

[Explanation of symbols]

1, 1B, 1C, 1D Selective intake device 5, 5B, 5C Selective intake mechanism 10, 10B, 10C Stacking pipe 11-14 Pipe 11c-14c Guide bush (guide member) 16a-19a, 16b-19b Guide rail (guide Member) 21-25 Connecting tool 30, 30B, 30C Outlet pipe 31, 32 Screen member 41-44 Rectifying plate 50 Elevating mechanism (elevating means) 51, 55, 56 Strut (guide member)

Claims (7)

[Claims] 1. A stacking pipe in which a plurality of pipes having substantially the same cross-sectional shape are stacked in a watertight state, and water introduced into the stacking pipe, which is connected to a lower portion of the stacking pipe, is led out of the stacking pipe. A connecting pipe for connecting the pipes constituting the stacking pipe so as to be separable from each other and restricting a separation distance between the pipes, and an elevating means for moving up and down the uppermost pipe of the stacking pipe. , By raising the topmost tube of the stacking tubes using the lifting means,
A selective water intake device characterized in that a selective water intake mechanism is configured to allow selective water intake by sequentially forming the openings from top to bottom by separating the pipes in order from the top while controlling the separation distance with a connector. . 2. The selective water intake device according to claim 1, wherein the inside of the pipe is partitioned by a current plate. 3. The selective water intake device according to claim 1, wherein each of the tubes forming the stacking tube is vertically movably guided by a guide member provided in the tube. 4. The selective water intake device according to claim 1, wherein each of the tubes forming the stacking tube is vertically movably guided by a guide member provided outside the tube. 5. The selective water intake device according to claim 1, wherein a screen member that covers the opening is provided in the stacking pipe. 6. The selective water intake device according to claim 1, wherein a seal member is provided at an end portion of the pipe. 7. The selective water intake device according to claim 1, wherein the entire stacking pipe is configured to be separable from an installation surface and is movable up and down by an elevating means.