JPH083970A - Water channel weir - Google Patents

Abstract

PURPOSE:To change the height of a weir. CONSTITUTION:Guide posts 2 are erected on both sides of a water channel 1, and a gate body 5 is fitted slidably into grooves in the vertical direction. Approximately one third on the upper side is notched while leaving lug sections on both sides in the gate body 5, and an upper gate 7 having a shape and size adapted to the notched section is mounted on the gate body by a pin 9. The upper gate 7 is rotated around the pin 9, and can be tilted. Fan-shaped plates 11 are extended toward the downstream side from the lug sections of the gate body so as not to form a clearance between the upper gate 7 and the gate body 5 when the upper gate 7 is inclined. A wire rope 13, a root of which is fixed onto the eyepiece of the upper gate 7, is passed through guide sheaves 15 installed to the gate lug sections, and further wound on the drum of a manual winch 17 through guide sheaves 16 on beams 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weir whose height can be changed, and is suitable for agricultural waterways.

[0002]

2. Description of the Related Art It is necessary to reduce the height of a weir so that water overflows when the flow rate of a water channel increases due to heavy rain so that the water level on the upstream side of the weir does not become abnormally high. A fall weir is conventionally known as a device capable of adjusting the height of the weir. This pivots the gate to the bottom of the canal, and when the water volume increases,
Tilt the weir to lower the height.

However, such a fall weir requires a support for pivotally supporting the gate at the bottom of the water channel, and therefore a step at the bottom of the water channel is inevitable and the construction cost is high. In some cases, the gate is divided into upper and lower parts, and the upper gate moves up and down along the lower gate. This type has the drawback that the friction force when the upper gate moves up and down is large and the movement is not smooth.

[0004]

SUMMARY OF THE INVENTION The present invention provides a height adjustable weir which is simple in construction and inexpensive.

[0005]

In this waterway weir, guide struts are erected on both sides of the waterway, and a gate body is provided which moves up and down along these guide struts. The upper part of this gate body is notched except for both ears, and the upper gate is pivotally supported in this notched part so as to be able to fall. Increasing the tipping angle of the upper gate changes the height of the weir.

If the rope for lifting the gate body is fixed to the upper part of the upper gate, and the rope is further loosened after the gate is closed, the upper weir gradually falls.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the drawings, guide columns 2 are erected on both sides of a water channel 1 and beams 3 are connected to the upper ends thereof. The guide column 2 has an H-shaped cross section, and the gate main body 5 is slidably fitted in the groove in the vertical direction. A gap between the guide column 5 and the guide column 5 is sealed with water by providing a seal packing (not shown) on the side edge of the gate body 5.

The gate body 5 leaves the ears 6 on both sides,
About one-third of the upper side is cut out, and an upper gate 7 having a shape and a size adapted to the cutout portion is attached to the gate body with a pin 9. The upper gate 7 can be tilted by rotating around this pin 9. A rubber sheet 10 is used to seal the gap between the upper gate 7 and the main body gate 5 with water.

When the upper gate 7 is tilted, the gate body 5
A fan-shaped plate 11 is extended from the ears 6 of the gate main body toward the downstream side so that no gap is formed between them. Upper gate 7
A seal packing (not shown) is provided on the side edge of the plate so that the seal packing comes into sliding contact with the plate 11.

The eye ropes 12 are fixed on both sides of the upper gate 7, and the wire ropes 13 rooted in the respective eye pieces pass through the guide sheaves 15 provided on the gate ears 6 and further on the beam 3. It winds up through 16 and the drum of a manual winch 17.

From the state where the gate is raised as shown by the chain line in FIG. 1, when the handle of the winch 17 is turned and the rope 13 is paid out from the drum, the gate 5 descends along the guide column 2 by its own weight, and eventually, The gate contacts the bottom of the waterway 1 as shown by the solid line. This is the tallest gate.

When the rope 13 is further extended from the winch 17, the upper gate 7 turns around the pin 9 and gradually tilts, and the height of the gate becomes smaller. The upper gate can be tumbled to a horizontal position as shown by the dashed line. When the amount of water flowing through the waterway 1 increases, the upper gate 7 is tilted in this way to reduce the height of the gate and make it easier for water to pass over the gate so that the upstream water level does not rise abnormally. .

When the winch handle is turned to tilt the upper gate, the upper gate tilts to the downstream side, so that a large force is not required. When the increase in water stops, the winch 17 is rolled up and the upper gate 5 is raised (Figs. 1 and 2).
Of the solid line). Additional winches can be used to raise the entire gate, if desired.

[0014]

As described above, in the water channel weir of the present invention, the guide pillars are set up on both sides of the water channel, and the gate main body which moves up and down along the guide pillars is provided. It is a pivotal support that can be turned over freely, and the height of the weir can be changed by turning over the upper gate. In particular, since there is no support for pivotally supporting the gate at the bottom of the water channel unlike the conventional tipping gate, the construction cost can be reduced and a step does not occur at the bottom of the water channel.

If the rope for hoisting the gate main body is fixed to the upper part of the upper gate, the upper gate will be gradually inclined only by loosening the rope after the gate is closed, so that the driving device becomes extremely simple. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a water channel weir.

FIG. 2 is a front view of the weir seen from the upstream side.

[Explanation of symbols]

 1 Waterway 2 Guide column 5 Gate body 6 Ears 7 Upper gate 13 Rope

Claims (2)

[Claims] 1. A guide strut (2) is erected on both sides of a water channel (1), and a gate main body (5) is provided which moves up and down along the guide strut. The gate main body has an ear portion (6) and an upper portion. A water channel weir that is notched and has an upper gate (7) pivotably supported in this notch. 2. A rope (1) for lifting the gate body.
The water channel weir according to claim 1, wherein 3) is fixed to an upper portion of the upper gate.