JPH0441207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water intake device that can selectively take in upper layer water from a reservoir of a dam or the like.

(Prior art) Conventionally, there are various types of water intake gates installed in dams and reservoirs, among others, gates suitable for surface water intake and equipped with a mouth where the water inflow opening opens in one direction. Surface water intake devices are known (see, for example, Japanese Utility Model Publication No. 57-38437). In this device, an upwardly protruding curved water guide part is formed at the upper end of the water intake gate to guide surface water flowing in from the water intake into the gate, and the lower curved surface of this water guide part serves as an overflow surface. At the same time, this overflow surface is provided at a higher position than the upper edge of the water intake opening, and an intake hole is bored in the upper curved surface above the overflow surface, covering this intake hole and extending above the water intake opening. A ventilation pipe with ventilation openings is provided. Therefore, a large volume of surface water can be efficiently taken in by a relatively small-scale device, and it has the advantage of being significantly smaller and lighter than conventional water intake devices. In this conventional device, the water intake tower is erected close to the dam dam, and the water intake opening is located on the opposite side of the dam dam and is provided in parallel.

In addition, as shown in Figures 4 and 5, the water intake gate (A) has a water intake opening (A) with a rectangular drinking hole (A) provided in a plane perpendicular to the water surface. Some are located within concrete water intake towers with internal bulkheads.

(Problem to be solved) However, with conventional water intake gates, the intake opening is located on the opposite side of the dam and the dam, and the gate is located close to the dam and inside the concrete water intake tower. The water flow in the water intake tower is disturbed, the interface position between the upper layer water and the lower layer water becomes higher, a vortex is generated, and the lower layer water further rises and is carried by the upper layer water, flows into the intake gate from the intake opening, and the upper layer water rises. There is a problem in that it is difficult to efficiently selectively take water.

This invention was made with the aim of solving the above-mentioned problems.

(Means for Solving the Problems) A water intake device according to the present invention is provided with a water intake gate in which cylinders with different diameters can be vertically expanded and contracted in a water intake tower surrounded by side walls on three sides,
The water intake device is equipped with a spout in which the upper end of the uppermost cylinder is curved and the water inflow opening is widened in one direction, and the water intake device is provided with a spout having a water inflow opening widened in one direction, and the water intake device is provided with a spout that extends downward into the water intake tower from the lower surface of the opening end of the spout or the vicinity thereof. A water-shielding plate is installed so that the water accompanying the horizontal flow of upper layer water does not flow into the cylinder so that it moves up and down together with the uppermost cylinder, and the lower edge of the water-shielding plate is connected to the upper and lower layer water. It is characterized by being located near the interface between the two sides, and having three sides along and close to the side walls.
The water shield plate may be hung vertically at or near the bottom of the opening end of the intake gate, or it may be installed in a spiral shape below the intake gate of the water intake gate so that the upper layer of water flows horizontally inside the water intake tower. To prevent the water accompanying the flow from flowing into the water intake tower,
Prevent the lower water interface position from becoming too high.

Therefore, the pond water that accompanies the water flowing toward the water intake opening hits the water shield plate and flows to the side, and does not flow into the water intake tower, so there is no turbulence in the water flow within the water intake tower. No vortex is generated. Then, only the upper layer water flows into the water intake gate from the water intake opening.

(Embodiment) Figures 1 to 3 show an embodiment of the present invention, in which 1 is a reservoir, 2 is a dam, and 3 is a water intake tower, which is equipped with a side bulkhead 4 protruding from the dam into the reservoir 1. It is opened only in the direction. 5 is the water intake gate,
Cylinders 5A to 5D with different diameters are fitted and connected so as to be expandable and retractable in the upward and downward directions, and the upper end of the uppermost cylinder 5A is curved so that its opening, that is, the water inflow opening 6, is rectangular in a plane perpendicular to the water surface. The spout 7 is opened in the shape and widened in the horizontal direction. Note that the lower end of the lowermost cylinder 5D is communicated with the buried water conduit 8. and each cylinder 5A
~5D are supported and guided by guide rails 13, 14, 15 provided on the inner wall surface of the water intake tower 3 by support arms 9, 10, 11, 12 extending in the radial direction. 16 is spout 7
It is a water-shielding plate installed in a spiral shape at the bottom of the cylinder 5A, and is inclined with respect to the vertical axis of the cylinder 5A, and its upper end is bent vertically upward and the end is attached to the lower surface of the lower edge of the water inflow opening 6. It is fixed. The water shield plate 1
6 has three sides along and close to the inner wall surface of the water intake tower 3, and in particular, the edge parallel to the inner surface 2A on the dam 2 side, that is, the lower edge 16A is located near the interface between the upper water and the lower water (from the interface position). (may be slightly above)
It is located in Note that it is preferable to provide a water-blocking side plate (not shown) between the back surface of the spout 7 and the side partition wall 4 to prevent water from flowing into the water intake tower 3 from the side. If the space is narrow and there is little water inflow, no water-blocking side panels are necessary. According to the embodiment of the present invention, the inflow of water into the upper part of the water intake tower 3 is blocked by the water shielding plate 16, so that the upper and lower water interface positions in the water intake tower 3 do not become high, and the water flow is There is no turbulence, and no vortices are generated or the lower water is carried upward. Therefore, selective intake of upper layer water is ensured.

Note that the water shielding plate 16 is indicated by the two-dot chain line 1 in FIG.
As shown at 16, the lower end edge 6A of the water inflow opening 6 is suspended vertically from the lower surface or the vicinity thereof,
The same effect can be expected even if the lower edge 116A is located below the interface between the upper water and the lower water.
Of course, this vertical water shielding plate 116 may be located flush with the front edge 4A of the side partition wall 4 or slightly inward.

(Effects of the Invention) In the water intake device according to the present invention, since the water shielding plate is provided at the mouth as described above, the flowing water generated by water intake does not flow into the water intake tower. Since turbulence and eddy currents do not occur in the water flow, and lower layer water is not entrained, the interface position between the upper layer water and lower layer water in the water intake tower does not become high, ensuring selective water intake of only the upper layer water and increasing efficiency. It has the effect of being able to do things.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention;
Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a cross-sectional plan view taken along the line A-A in Fig. 2, and Fig. 4 is a vertical cross-sectional side view corresponding to Fig. 2 of a conventional water intake gate. FIG. 5 is a plan view of FIG. 4, showing the state of water flow. 1... Reservoir, 2... Weir, 3... Water intake tower, 4... Side bulkhead, 5... Water intake gate, 5A... Top cylinder,
5B-5D...Cylinder, 6...Water inflow opening, 6A...
Lower edge, 7... spout, 16,... water shielding plate, 16A... lower edge of water shielding plate.

Claims (1)

[Claims] 1 A water intake tower surrounded by side walls on three sides and open on one side is equipped with a water intake gate in which cylinders of different diameters can be vertically expanded and contracted, and the upper end of the topmost cylinder is curved to form a water inflow opening. In a water intake device equipped with a spout that expands in one direction, the upper end is located downward from or near the lower surface of the opening end of the spout, the lower edge is inclined with respect to the vertical axis of the cylinder, and the lower edge is arranged so that the upper layer A water-shielding plate located near the interface between the water intake tower and the lower water is fixed to the uppermost cylinder in a spiral shape, and three sides of the water-shielding plate are along and close to the inner wall surface of the water intake tower. water intake device.