KR100358471B1 - Flap gate to exclude sediment in front of gates in estuary - Google Patents

Abstract

The present invention is to prevent the earth and sand deposited on the drainage front of the drainage door to be effectively removed or deposited by using the hydraulic power during drainage, the pressure of the river water in the lower half of the gate (3) installed in the river drainage door (1) It is a door drainage for river drainage doors equipped with a plurality of nozzles (4) at least horizontally flushing a strong stream.

Description

Flap gate to exclude sediment in front of gates in estuary}

The present invention relates to a river drainage door door that can prevent the sediment deposited or deposited before the doorway of the river drainage door to be effectively removed or deposited by using the inner layer pressure.

On the south and west coasts of our country, there are many large and small rivers. Drainage gates are installed in the estuaries where these rivers come into contact with the sea, and gates are installed in the drainage gates to prevent freshwater drainage and seawater inflow. Large drainage gates such as Asan, Sapa Bridge, and Cheonsu Bay, are difficult to open and close by manpower or water pressure, so they are powered by an electric device.The drain doors installed at small drains are opened by river water that has a high water level at low tide. At high tide it is a flap gate, a so-called self-opening and closed door closed by sea water pressure reversed to superior water level, the upper both sides of which are hinged on the top of the drain or installed on the doorpost.

However, depending on the regional characteristics of the river, there may be a situation where the flap gate cannot be opened due to soil piled up outside the drainage gate, especially the front of the gate. If the automatic opening and closing doors are not opened on time due to the soil piled up in front of the drainage gate during flooding, the farmland, low-lying houses, vinyl houses, barns, agricultural facilities, etc. may suffer serious flooding damage. You need to prepare.

Soils that have been deposited in front of drainage ditches or drainage gates have been mainly used to forcibly open automatic gates by dredging or hoisting special equipment. However, this method is not only costly, but also unable to cope with untimely flooding in a timely manner. Therefore, the necessity of the sediment removal method to prevent the deterioration of the automatic gate opening due to the sediment is emerging.

The present invention is to provide a gate drainage gate door that can be prevented from being removed or deposited very efficiently at low cost without mobilizing the earth and sand removal equipment and manpower in preventing or preventing the flap gate opening and closing disorder due to sediment in the drainage channel .

The present invention is equipped with a nozzle on the lower half so that the water flows through the drainage door or when the sewage carried at high tide is likely to be deposited in the drainage side gates to be injected into the pressure water using the water pressure of the river water to the maximum It is characterized by the river drainage gate door that washes away the sediment accumulated in the drainage channel by using the high pressure river water that is discharged through the gate.

1 is an excerpt front view of a river drainage door in which a nozzle-mounted door is installed according to the present invention, and a side plate is omitted.

2 is a partial cutaway side view of a nozzle-mounted portal device (flap gate);

3 is a reference plan view illustrating a situation in which the sedimentary soil of the gate is removed by a nozzle-mounted gate door;

<Explanation of symbols for the main parts of the drawings>

3: door solution 4: nozzle

5: stool

In Fig. 1 and Fig. 2, a conventional drain 1 installed in an estuary is generally formed with a plurality of drain holes 2 squarely in a row, and each drain hole 2 is provided with a door lock 3.

The nozzle 4 is mounted on the lower half of the door door 3. The closer the water is to the bottom of the river trapped by the door, the higher the water pressure. In order to efficiently use the river water having high water pressure, it is advantageous that the nozzle 4 is located under the doorway 3 as much as possible. In addition, the nozzle 4 may be equipped with a plurality of nozzles rather than a single stage, and a plurality of high-pressure streams of water may be blown out at the same time.

In this sense, the nozzle 4 is plural and concentrated at the lower half of the doorway 3. The nozzle 4 may also be disposed to be inclined so as to concentrate the horizontal body of water in the drainage, and to extend the spraying direction, the body of water is disposed in the radial direction.

In addition, the nozzle (4) should be avoided so that the river water is smoothly flushed, but the inflow of sea water. Therefore, the nozzle 4 first takes a cross section where the sea is seen from the estuary and the aperture is significantly smaller. To make this more complete, the valve plate 5 is attached to the ejection end of the nozzle 4. Since the side plate 5 only needs to perform a simple opening / closing function for the nozzle 4, a flap gate type, which is a typical example of a drainage gate door, is simple and easy to maintain.

The diameter, number, and attachment positions of the nozzles 4 are appropriately determined based on field surveys of the streams, reduction of sedimentary deposits after completion, and maximum deposits at the doors.

In Figure 3, when the low tide time, when the sea water pressure falls below the water pressure of the river water, the river water is spouted from the nozzle (4a) of the upper row to the powerful stream (a) even if the door (3) has not been opened yet, and then the sea level is gradually lowered Such a stream of water a is also flushed by the nozzle 4b. This stream (a) is gradually weakened as the door (3) is opened and drainage is carried out in earnest.

In any case, as the river water spouted into a powerful stream (a), a violent water phenomena occurred, disrupting the soil piled up along the drainage channel, and then swept away and swept away. Away from the ditches

As a result, there is no time for earth and sand to be deposited at the gate of Moonbi (3). Even if the earth and sand are deposited, they are removed before they solidify by the spraying that is made in time according to the low water that is repeated twice a day. Even if you are concerned, you will always be able to open without problems.

As described above, can the present invention effectively prevent sediment deposition at the gate of the drainage gate, especially at the side gate of the drainage gate, where sediment is very likely to be deposited by using the hydraulic power of the lower water with high water pressure in the reservoir river water. Soil sediment deposited in the drainage can be removed without touching the removal equipment and cost by touching the water sprayed by strong water pressure. Thus, we can free ourselves from the floodwaters that had been suffered by earth and sand in the past.

Claims (3)

The earth and sand removal gate of the river drainage door that installed the nozzle (4) to the gate (3) is installed in the river drainage door (1). 2. The gate silt removal apparatus according to claim 1, wherein the nozzles are formed in plural and are mounted at least one row at least horizontally in the lower half of the gate door. 3. The soil removal gate of the river drain door according to claim 2, wherein the nozzle (4) is attached to the nozzle end for preventing the inflow of seawater.