JPS5838014Y2 - Selective water intake equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a selective water intake facility having a gate that can selectively take in surface water or water below.

In recent multi-purpose dams, installation of selective water intake facilities that can perform surface water intake and bottom water intake has become an essential requirement in response to requests from residents around the dam.

Typical gate types used in such equipment are cylindrical gates, semicircular gates, and straight gates.

By the way, there are some problems in planning such facilities.
One problem is sedimentation.

In other words, sediment flowing from upstream is deposited near the dam,
It is to obstruct the gate function, especially the lower end water intake.

The present invention proposes a selective water intake facility that can solve the above problems, and one embodiment thereof will be described below based on the drawings.

Reference numeral 1 denotes a dam, and a receiving part 2 is provided at the middle part of the dam body on the front side 1a, and a supporting part 3 is provided at the upper end thereof.

The upper surface of the receiving part 2 is formed on the tower floor surface 2a, and a water intake pipe 4 with a bell mouth 4a opening therein is formed in the dam 1.

Reference numeral 5 denotes a cylinder gate, which includes a lowermost water intake pipe 6, an intermediate water intake pipe 7, an uppermost water intake pipe 8, and a superposition of each water intake pipe that can be placed on the tower floor surface 2a in a state surrounding the bell mouth 4a. The upper end of the uppermost water intake tube 8 is formed into a water intake tray 10.

Although the embodiment shows a three-stage expansion/contraction format, the number of stages can be changed arbitrarily.

Reference numeral 11 denotes a float with a rectifier plate attached to the water intake basin 10 via a connecting tool (bolt/nut) 13 to form a water intake port 12 between it and the above-mentioned water intake basin 10. A pulley 14 is attached.

Reference numeral 15 denotes a gate lifting/lowering drive device (winch device) provided on the support portion 3, by which a wire rope 16 to be wound and let out is wound around the pulley 14.

Reference numeral 17 denotes a wall surrounding the lower part of the cylinder gate 5, which is made of concrete, etc.
a forms an upwardly open column interior 18.

The height of this wall 17 is set to the planned sedimentation surface 19.

The front surface of the wall 17 has a slit 2 extending almost the entire height.
0 is molded, and this slit) 20 has a screen 21
is provided.

The width of the slit 20 is determined from the flow rate of the lower end discharge.

The screen 21 is located on the left and right inner surfaces of the slit 20.
One groove 22 is formed inside the groove 22, and a corner drop 23 can be inserted between these grooves 22.

The corner drop 23 has a pair of left and right protrusions 24 on its upper surface, and has a recess 25 on its lower surface into which these protrusions 24 can fit.

Reference numeral 26 denotes a water intake tower provided alternately between the upper surface of the wall 17 and the lower surface of the support section 3, and is composed of a plurality of columns 27, cross beams 28 provided between these columns 27, and a screen 29 provided over the entire area. has been done.

Reference numeral 30 denotes a corner droplet storage stand provided inside the upper part of the water intake tower 26, which allows a predetermined number of corner droplets 23 to be stored therein.

Reference numeral 31 denotes a corner drop lifting drive device (winch device) provided on the support part 3, and a corner drop 23 is provided at the lower end of the wire rope 32.
A hanging beam 33 that can be engaged and detached is attached to.

A guide metal fitting 34 is attached to the cross beam 28 for smoothly raising and lowering the corner drop 23 via the suspension beam 33.

35 indicates the always full water level, and 36 indicates the sedimentation surface. According to the above structure, surface water can be taken in through the water intake port 12 by expanding and contracting the cylinder gate 5 so that the float 11 with a rectifying plate is located at the water level by operating the gate lift drive device 15.

Furthermore, by lifting the cylinder gate 15, water can be taken in at the lower end without using the cylinder gate 5.

Although such selective water intake can be performed, the corner drop 23 is not used after the dam construction when the sedimentation surface is below the tower floor surface 2a.

Then, when the sedimentation surface is close to or above the tower floor surface 2a, the first corner drop 23 is dropped for the first time.

That is, the hanging beam 33 is locked to the corner cutout 23 on the storage stand 30, and the hanging beam 33 is guided by the guide hardware 34 and suspended.
Furthermore, it is reduced to 20 slit questions.

Thereafter, as the sedimentation surface rises, a second stage corner drop and a third stage corner drop are performed to prevent sediment from entering the tower interior 18.

Note that FIG. 2 shows a state in which the third stage corner cutting has been performed.

As described above, according to the present invention, by dropping the corner drop in line with the sediment surface that is being accumulated in the dam, the lower part of the gate where surface water intake and bottom water intake can be performed can be affected by sedimentation. It is possible to prevent water intake from occurring at the lower end and ensure water intake at the lower end.

Furthermore, all the obstacles caused by deposits around the gate, such as paint peeling due to sediment, corrosion, wear, and increased operating loads, can be overcome.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic longitudinal sectional side view, Fig. 2 is a longitudinal sectional side view showing the lower part on the right side and the upper part on the left side, Fig. 3 is a cross-sectional plan view, and Fig. 4 shows essential parts. FIG. 5 is a perspective view of the corner cut, FIG. 6 is a partially cutaway side view of the main part, and FIG. 7 is a plan view showing the guide state. 1... Dam, 4... Water intake pipe, 5...
... Cylinder gate, 6 ... Bottom water intake tube,
11... Float with rectifier plate, 15...
Gate lift drive device, 17...Wall, 20
...Slit, 21...Screen,
22...1 groove, 23...corner cut, 26
... Water intake tower, 30 ... Corner drop storage platform,
31... Corner drop lifting drive device.

Claims (1)

[Scope of utility model registration request] A wall is provided surrounding the lower part of the gate that can selectively take in surface water or water from below, and a slit is formed at an appropriate location on this wall, extending almost the entire height thereof, and a screen is provided in the slit. A selective water intake facility characterized by being configured such that a corner drop can be inserted partially into the screen (on the downstream side).