JP2001064949A - Flow slowing gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow slowing gate, by which an overflow is slowed even in any overflow water depth and bubbles and noises can be suppressed. SOLUTION: The flow slowing gate is composed of an upstream-side gate 3 pivotally supporting the upstream-end 3a for vertically rocking the downstream-end side 3b and a downstream-side gate 4 pivotally supporting the downstream-end side 4b for vertically rocking the downstream-end side 3b of the upstream-side gate 3 by the abutting of the upstream-end side 4a against the rear of the upstream-side gate 3 and the vertical rocking of the upstream-end side 4a. The upstream-end side 4a of a downstream-side gate 4 is rocked vertically by installing an extensible and contractible water chamber 5 on the rear of the downstream-side gate 4. Sealing member 7-11 are mounted on the upstream-end side pivotal supporting section 3aa of the upstream-side gate 3, a transfer section from the downstream end of the upstream-side gate 3 to the downstream-side gate 4, the downstream-end side pivotal supporting section 4ba of the downstream-side gate 4 and both side sections of the upstream-side gate 3 and the downstream-side gate 4. Accordingly, a flow is slowed even in any overflow water depth, and the generation of bubbles and noises can be suppressed effectively while a leakage of water and the flowing-in of soil and sand can be prevented effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate for adjusting the amount of water in a river or the like, and more particularly, to a gate for reducing the flow and noise of an overflow which flows from upstream to downstream over the gate. It is about.

[0002]

2. Description of the Related Art For example, when a river is provided with a gate to adjust the amount of water flowing from upstream to downstream, when the discharge amount is large, that is, when the overflow water depth is large, the water flows from the upstream side to the downstream side through the gate. Since the flow velocity of the overflow is high, bubbles and noise are generated when the overflow water falls to the downstream side. Also,
At the time of such discharge, if earth and sand flows into the gate riverbed, it will hinder the opening and closing control of the gate.

In order to solve such a problem, sector gates and rubberized gates (circular) have been put into practical use as gates for reducing the flow velocity of overflow water, that is, for slowing the flow. However, these gates can reduce the flow only at a certain overflow depth, and cannot reduce the flow at any overflow depth. Therefore, it is hard to say that it is perfect in terms of suppressing bubbles and noise.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables the overflow to be moderated at any overflow water depth, thereby reducing the generation of bubbles and noise. It is an object of the present invention to provide a flow mitigation gate that enables suppression.

[0005]

In order to achieve the above-mentioned object, the present invention provides a slow-flow gate comprising: an upstream gate pivotally supporting an upstream end so that a downstream end swings up and down; The upstream end is in contact with the back of the gate and swings up and down, so that the downstream end of the upstream gate swings up and down. Shall provide a water chamber or air chamber that can be expanded and contracted. By doing so, a continuous downward slope from the upstream gate to the downstream gate is formed at any overflow depth, and the overflow can be moderated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A slow-flow gate according to the present invention comprises an upstream gate pivotally supporting an upstream end so that a downstream end swings up and down, and an upstream end contacting a back surface of the upstream gate so that the upstream end is vertically moved. It consists of a downstream gate pivotally supporting the downstream end to swing the downstream end of the upstream gate up and down by swinging,
A water chamber or an air chamber which can be expanded and contracted is provided on the back surface of the downstream gate so that the upstream end of the downstream gate is vertically swung.

The slow-flow gate of the present invention combines an upstream gate whose lower end swings up and down and a downstream gate whose upper end abuts against the back surface of the upstream gate and swings up and down. Therefore, a continuous downward slope from the upstream gate to the downstream gate can be formed at any overflow water depth. Therefore, the flow can be slowed down at any overflow water depth, and bubbles and noise can be suppressed.

[0008] In the above-mentioned flow mitigation gate of the present invention, the upstream end pivotal support portion of the upstream gate, the transfer portion from the downstream end of the upstream gate to the downstream gate, and the downstream end of the downstream gate are provided. If seal members are provided on the side pivots and on both sides of the upstream gate and the downstream gate, it is possible to effectively prevent water leakage and inflow of earth and sand into the above-described portions. There is no hindrance to control.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 and FIG.
A description will be given based on one embodiment shown in FIG. FIG. 1 is a side view showing an embodiment of a flow mitigation gate according to the present invention, and FIG. 2 is a view of FIG. 1 as viewed from the plane.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a mitigation gate according to the present invention for adjusting the amount of water in a river 2, which is constructed as follows. Reference numeral 3 denotes an upstream gate, and reference numeral 4 denotes a downstream gate that forms a pair with the upstream gate 3, and each has a width slightly shorter than the river 2 to be installed.

The upstream gate 3 is connected to its downstream end 3
b pivots on the upstream end side 3a so as to swing up and down, and the downstream side gate 4 pivotally supports the downstream end side 4b so that the upstream end side 4a swings up and down. Is made to abut on the rear surface of the upstream gate. Therefore, by vertically swinging the upstream end side 4a of the downstream gate 4, the downstream end side 3b of the upstream gate 3 swings vertically.

In this embodiment, a gate roller 4c is rotatably installed on the upstream end 4a and provided on the river bank so that the upstream end 4a of the downstream gate 4 can be swung up and down smoothly. The upper and lower guides swing along the guide 12 shown in FIG.

Reference numeral 5 denotes a water chamber provided on the back surface of the downstream side gate 4 and formed, for example, in a hermetically sealed state with rubber, from a pressure source 6 such as a motor / pump provided on the river bank from a hydraulic pipe 6a.
In particular, the portion located on the upstream end side 4a of the downstream gate 4 expands and contracts by the pressure water supplied through the downstream gate 4 so that the upstream end side 4a of the downstream gate 4 swings up and down. The portion located on the upstream end side 4a is formed, for example, in a bellows shape.

Reference numeral 7 denotes an upstream end 3a of the upstream gate 3.
A rubber plate for dust prevention provided so as to cover the pivot portion 3aa of
Reference numeral 8 denotes a dust-proof rubber plate provided at a transfer portion from the downstream end of the upstream gate 3 to the downstream gate 4, and 9 denotes a downstream gate 4.
The dust-proof rubber plate 10 provided so as to cover the pivot 4ba at the downstream end 4b is provided on both sides of the upstream gate 3, and a side seal rubber 11 that covers the gap between the upstream gate 3 and the river. Are provided on both sides of the downstream gate 4,
Side seal rubber that covers the gap between the downstream gate 4 and the river.

When the dust-proofing rubber plates 7 to 9 and the side sealing rubbers 10 and 11 are provided in the flow-reducing gate 1 of the present invention, it is possible to effectively prevent water leakage and the inflow of earth and sand into the above-mentioned portions. And the gate opening / closing control is not hindered.

In the flow mitigation gate 1 according to the present invention having the above-described structure, the amount of pressure water supplied from the pressure source 6 to the water chamber 5 is controlled in accordance with the amount of water flowing downstream, and is controlled via the downstream gate 4. It is only necessary to raise and swing until the downstream end 3a of the upstream gate 3 reaches a predetermined height.

In this state, the overflow water flowing from the upstream side to the downstream side through the flow mitigation gate 1 according to the present invention does not flow naturally but flows along the downstream side gate 4 inclined downward. Regardless of the overflow water depth, the flow can be moderated, and the generation of bubbles and noise due to falling can be effectively prevented.

When the water overflows through the slow-flow gate 1, the inflow of sediment into the riverbed of the gate can be effectively prevented by the dust-proof rubber plates 7 to 9 and the side seal rubbers 10, 11. Become. Even if the sediment flows into the gate riverbed, in the slow flow gate 1 according to the present invention, the vertical swing of the upstream gate 3 and the downstream gate 4 is controlled by the water chamber 5 provided on the back surface of the downstream gate 4. Therefore, the gate opening / closing control is not hindered.

In this embodiment, the water chamber 5 is provided as means for vertically swinging the upstream end 4a of the downstream gate 4. However, an air chamber may be provided in place of the water chamber 5. Good. If the upstream end 4a of the downstream gate 4 can be expanded and contracted so as to be able to swing up and down, as shown in the present embodiment, the upstream end 4a of the water chamber 5 is located at the upstream end 4a of the downstream gate 4. The portion to be formed does not have to be formed in a bellows shape.

[0020]

The slowing gate of the present invention is composed of an upstream gate whose lower end swings up and down, and a downstream gate whose upper end abuts on the back surface of the upstream gate and swings up and down. Therefore, regardless of the overflow water depth, a continuous downward slope from the upstream gate to the downstream gate can be formed, and the flow can be moderated. And, by this slow flow, it is possible to effectively suppress generation of bubbles and noise.

Further, in the slowing gate according to the present invention, the upstream end side pivotal support portion of the upstream side gate, the transfer portion from the downstream end of the upstream side gate to the downstream side gate, and the downstream end side pivot of the downstream side gate. When seal members are provided on the support portion and on both sides of the upstream gate and the downstream gate, it is possible to effectively prevent water leakage and inflow of earth and sand into the above-described portions, so that the opening and closing control of the gate can be performed. There will be no hindrance.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a flow mitigation gate according to the present invention.

FIG. 2 is a view of FIG. 1 viewed from a plane direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slow flow gate 3 Upstream gate 3a Upstream end 3aa Upstream end pivot 3b Downstream end 4 Downstream gate 4a Upstream end 4b Downstream end 4aa Downstream end pivot 5 Water chamber 6 Pressure source 7 Dustproof rubber plate 8 Dustproof rubber plate 9 Dustproof rubber plate 10 Side seal rubber 11 Side seal rubber

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toru Ono 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka F-term in Hitachi Zosen Corporation (reference) 2D019 AA31 CA11 DA00

Claims (2)

[Claims] An upstream gate pivotally supported on an upstream end so that a downstream end swings up and down, and an upstream end abuts on a back surface of the upstream gate and swings up and down, whereby the downstream end of the upstream gate is swung. It is composed of a downstream gate pivotally supporting the downstream end side to swing the side up and down, and the upstream end side of the downstream gate is provided by providing a water chamber or air chamber which can be expanded and contracted on the back surface of the downstream gate. A slow-flow gate characterized by swinging up and down. 2. An upstream end pivot portion of the upstream gate, a transfer portion from the downstream end of the upstream gate to the downstream gate, a downstream end pivot portion of the downstream gate, and the upstream gate and the downstream side. 2. The slow flow gate according to claim 1, wherein seal members are provided on both sides of the gate.