JPS586896Y2 - surface water intake device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a device for taking in water from the surface of a dam or the like.

Conventionally, when taking water from a dam, for example, water was taken from the bottom or from the surface.
Water has a high temperature on the surface side and a low temperature on the bottom side, so if water is taken from the bottom, the water becomes too cold, which can kill fish or inhibit the growth of paddy rice downstream. there were.

Therefore, in recent years, consideration has been given to taking water exclusively from the surface of the dam in order to solve these problems.

A conventional surface water intake device is shown in FIG. 1, where 1 is a float floating on the dam water surface.

The float 1 has a disc shape, and a water intake board 2 is provided along the lower surface of the float 1, with a flat part on the outer periphery and an inverted conical shape at the center. A shaped water intake hole 3 is provided at the bottom of the float 1.
A first stage water intake pipe 4 having a water intake hole communicating with the first stage water intake pipe 4 is fixed to the first stage water intake pipe 4, and a first stage water intake pipe having an inner diameter larger than the outer diameter of the first stage water intake pipe 4 and having a telescopic shape is attached to the first stage water intake pipe 4. A second-stage water intake pipe 5 fitted to the outer periphery of 4 is attached so that it can be raised and lowered, and a telescopic third-stage water intake pipe 6 formed in the same manner as described above is fitted into the second-stage intake pipe 5 so that it can be raised and lowered. Hereafter, as described above, the fourth stage intake pipe 7 is fitted into the third stage intake pipe 6 so as to be able to rise and fall freely, and the lower end of the lowest stage water intake pipe (in this example, the fourth stage intake pipe 7) is connected to the concrete block 8 of the dam. Insert it into the water intake hole 9 provided in the.

The float 1 and each water intake pipe are housed in the water intake tower 10 for safety and long-term use.

At the connecting portion of each expanding and contracting intake pipe, a bracket 11 is attached to the outer circumferential side of the lower end of the upper intake pipe, and a guide roller 12 is attached to the bracket 11, as shown in FIG. 2, so that the intake pipe can slide smoothly. A bracket 13 is attached to the inner peripheral side of the upper end of the lower water intake pipe, and a guide roller 14 is rotatably attached to the bracket 13.
Brackets 11 and 13 are arranged so that the tips of the guide rollers 14 and 14 are in approximate contact with the inner periphery of the water intake pipe located outside, and the tips of the guide rollers 14 are made to be in approximate contact with the outer periphery of the intake pipe located inside.
A stopper is formed using angle iron to prevent the intake pipes from coming off, and a sealing device 16 made of rubber, synthetic resin, etc. is attached to the bracket 15 attached to the upper end of the outer circumference of the lower intake pipe to prevent water from leaking. Attach.

Water from the dam flows into the first stage intake pipe 4 from the water intake hole 3, flows down the second to fourth stage water intake pipes 5, 6.7, and flows out from the water intake hole 9 to the river, but the water level decreases. Along with this, the float 1 and each intake pipe 4, 5, 6.7 are lowered together, and the fourth-stage intake pipe 7, which is the lowest stage with its lower end inserted into the intake hole 9, enters the intake hole 9 downward. The fourth stage water intake pipe 7 is supported on the upper surface of the concrete block 8, and the float 1 has water intake pipes 4,
A load of 5.6 is applied.

When the water level further decreases, the guide roller 1 of the third stage water intake pipe 6
2 rotates along the inner surface of the fourth stage water intake pipe 7 and descends together with the third stage water intake pipe 6, while the guide roller 14 of the fourth stage water intake pipe 7 supports the outer surface of the third stage water intake pipe 6 and rotates along the inner surface of the fourth stage water intake pipe 7. It guides the descent of the setup water pipe 6.

When the third-stage water intake pipe 6 enters the fourth-stage water intake pipe 7 and the third-stage water intake pipe 6 does not descend any further, it is supported and guided by the guide rollers 12 and 14 as before and moves to the second stage. When the water pipe 5 descends and the second-stage water intake pipe 5 no longer descends, the first-stage water intake pipe 4 is similarly supported and guided and descends.

However, in the above-mentioned conventional example, the bracket 11.
13 and guide rollers 12 and 14 must be accommodated, the gap The weight of the entire water intake pipe becomes very large, the diameter of the float 1 becomes large, and the diameter of the water intake tower 10 that houses the surface water intake device also becomes large, which is uneconomical, and furthermore, there are problems in terms of strength. Since the diameter of the pin that supports the guide roller cannot be made below a certain level, the guide roller diameter will become smaller if the gap As a result, there were problems such as the guide roller becoming unable to rotate.

The present invention was developed with the aim of eliminating the above-mentioned drawbacks of conventional equipment, and includes a water intake plate on the bottom surface of the float and a plurality of telescopic water intake pipes whose cross-sectional dimensions become larger or smaller as they go downwards. A plurality of guide rollers are pivotally connected to the plurality of intake pipes so as to be able to rotate along the inner surface of the intake pipe having a large cross-sectional dimension when the intake pipes expand and contract, and the guide rollers are arranged so as to be expandable and retractable. A side end is located inside the inner surface of the intake pipe to which the guide roller is pivotally attached, and an intake pipe with a small cross-sectional dimension is attached to the intake pipe other than the intake pipe fixed to the intake plate among the plurality of intake pipes when the intake pipe expands and contracts. A plurality of guide rollers are pivotally mounted to rotate along the outer surface of the water pipe, and the ends of the guide rollers on the outer side of the water intake pipe are positioned outside the outer surface of the water intake pipe on which the guide rollers are pivotally mounted. That is.

Embodiments of the present invention will be described below with reference to the drawings.

A required number of notches are provided at appropriate intervals on the circumference of the lower end of the upper water intake pipe 17, and the side shape of the notch is arcuate in order to reduce the resistance of flowing water in the water intake pipe as much as possible. In addition, a bracket 18 whose arcuate portion is located inside the upper water intake pipe 17 is fixed, and guide rollers 2 are attached to the bracket 18 so as to be radial as shown in FIG. 3 when viewed from above.
0 via pin 19.

Further, the water flow passage cross-sectional area at the lower end of the upper water intake pipe 17 is formed to be as large as necessary.

A lower water intake pipe 21 whose inner diameter is larger than the outer diameter of the water intake pipe 17 is fitted into the upper water intake pipe 17 so as to be able to rise and fall freely, and a bracket 22 is fixed to the outer periphery of the upper end of the lower water intake pipe 21. Ring-shaped sill devices 23 made of rubber or synthetic resin are attached to the brackets 22 at required intervals to prevent water from leaking into the brackets 2.
4, guide rollers 26 are pivotally mounted via pins 25 so as to be radial as shown in FIG. 4 when viewed from above.

In addition, stoppers 27.2 are provided on the intake pipe 17 and the intake pipe 21, respectively.
8 is firmly fixed so that it does not come off from the upper water intake pipe 17 even when the lower water intake pipe 21 is located at the lowest end.

Of the guide rollers 20 and 26, the guide roller 2
0 is located at a position that substantially contacts the inner surface of the water intake pipe 21, and the guide roller 26 is located at a position that substantially contacts the outer surface of the water intake pipe 17, so that both the water intake pipe 17 and the water intake pipe 21 can expand and contract smoothly. There is.

When the water level of the dam decreases, when the lower water intake pipe 21 is no longer lowered, the guide roller 20 of the upper water intake pipe 17 rotates along the inner surface of the lower water intake pipe 21, and the lower water intake pipe 21 is rotated. The guide roller 26 is the upper part of the water intake pipe 17
The upper water intake pipe 17 descends.

When the water level of the dam rises, the upper water intake pipe 17 rises, contrary to the above.

The embodiments of the present invention are not limited to the above-mentioned embodiments, and any number of guide rollers may be attached to each intake pipe, and the guide rollers of the upper intake pipe and the guide rollers of the lower intake pipe may be attached to each intake pipe. It is possible to carry out the project even if the phase is shifted or the number of floats is different, the floats may have any structure, the cross-sectional shape of the intake pipe is not limited to circular, but may be polygonal such as a rectangle, and the scope does not deviate from the gist of the tree felling idea. Of course, various changes can be made within the framework.

According to the surface water intake device of the present invention, the following various excellent effects can be achieved.

(i) The gap X between the outer surface of the upper intake pipe and the inner surface of the lower intake pipe becomes smaller (X = 7.5 to 1.5 cm in the conventional model, approximately 2 cTn in the present invention), and therefore the outer diameter of the lower intake pipe becomes smaller. The handle weight is also reduced.

(ii) Since the weight of the entire water intake pipe is reduced, the buoyancy of the float is also small, and the diameter of the float is therefore also reduced.

(iii) If the float diameter becomes smaller, the frontage and depth of the water intake tower will also become smaller, resulting in good economic efficiency.

[Brief explanation of the drawing]

Fig. 1 is an overall explanatory diagram of the surface water intake device, Fig. 2 is an explanatory diagram of the guide roller used in the connection part of the intake pipe of the surface water intake device of Fig. 1, and Fig. 3 is an explanatory diagram of the guide roller used in the surface water intake device of the present invention. Explanatory diagram of the guide roller part attached to the upper water intake pipe, No. 4
The figure is an explanatory diagram of the part of the guide roller attached to the lower water intake pipe used in the surface water intake device of the present invention, Figure 5 is a detailed diagram of the guide roller shown in Figures 3 and 4, and Figure 6 is the figure 5. FIG. 7 is a view taken in the ■ direction of FIG. 5. In the figure, 1 is a float, 2 is a water intake board, 3 is a water intake hole, 17 is an upper water intake pipe, 20, 26 is a guide roller, and 21 is a lower water intake pipe.

Claims (1)

[Scope of utility model registration request] At the bottom of the float, a water intake plate and a plurality of telescopic water intake pipes whose cross-sectional dimensions become larger or smaller as they go downwards are arranged so as to be expandable and retractable. A plurality of guide rollers are pivotally mounted so as to be able to rotate along the inner surface of a large water intake pipe, and the ends of the guide rollers on the center side of the water intake pipe are located inside the inner surface of the water intake pipe to which the guide rollers are pivotally mounted. A plurality of guide rollers are pivotally attached to the intake pipes other than the intake pipes fixed to the intake board, so that the guide rollers can rotate along the outer surface of the intake pipe having a small cross-sectional dimension when the intake pipe expands and contracts. A surface water intake device characterized in that an outer end of the water intake pipe is located outside an outer surface of the water intake pipe to which the guide roller is pivotally attached.