JPS6046209B2 - Water gate with built-in float type check valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water gate body to be disposed at the boundary between a river and the sea, which allows river water to flow down but prevents seawater from flowing in.

The purpose of this invention is to have a built-in water gate installed in the water gate so that when the water level of the river, i.e., the internal water, rises above a certain level, this water is automatically flowed to the outside water side, and the water level of the sea, i.e., the external water, is raised to the internal water level. To provide a water gate which prevents the water from rising further and backflowing by using a check valve using a float.

To explain this invention with reference to the drawings, a river is divided into an internal water 2 and an external water 3 by a water gate 1, and a water stop plate 4 is provided on the external water 3 side of the water gate 1, on both sides and at the lower end. Attach waterproof rubber 5, 5, and 6 to the edges.

Main rollers 7, 7 are provided on both sides of this water gate 1, and are guided by door grooves 9, 9 provided in a weir pillar 8 to raise and lower the water gate 1. A partition plate 10 for partitioning internal water 2 and external water 3 is provided in this water gate 1, and a check float valve 12 using a float 11 is attached to this partition plate 10.

This float 11 has an appropriate buoyancy depending on the conditions of the place where it is installed. The valve seat 13 of the float 11 has a rectifying tube 14 that opens upward, and is formed to determine the lowest intake level of the internal water 2 and to improve the flow coefficient. A guide rod 15 for raising and lowering this float 11
, 16, and the holding cylinder 17 of the upper guide rod 15 is fixed to the rectifying cylinder 14 by a rectifying plate/support plate 18. A space in the water gate 1 below the float valve 12 is called a float chamber 19, and a drainage hole 20 is opened in the lower part of the water stop plate 4 facing the outside water 3.

This drain hole 20 is equipped with a screen 21 and the float chamber 1
This prevents trash from entering the interior of the building, and also suppresses the influence of waves from the outside water side. Now, when the inner water level rises by a certain value from the outer water level, the pressure generated by the water level difference overcomes the buoyancy of the float 11 and pushes the float 11 down.
As shown in FIG. 2, the internal water 2 flows out to the external water 3 side.

When the outside water level rises above the inside water level, the float 11 rises due to the buoyancy of the float 1'1 and the water level difference between the inside and outside water levels, and forms a perfect watertight line due to contact pressure with the water honey rubber of the valve seat body 13. , preventing the outside water 3 from entering the inside water side.

Furthermore, since the float 11 is located at the upper end of the float chamber 19 and the drain port 20 is located at the lower part of the float chamber, even if the outside water 3 is seawater, the difference in density between seawater and freshwater causes water to flow through the float chamber. The upper half of 19 (for example, the part from line segment b-b to the upper end of the float chamber in Figure 2) is a freshwater area, and the float can operate reliably without fear of marine organisms adhering to various parts of the valve body. This means that it can be maintained for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a water gate 1 according to the present invention, and FIG.
The figure is a side view taken longitudinally along the line (■--■) of FIG. 1, and FIG. 3 is a partial side view of the main part of FIG. 2. In the drawing, reference numeral 1 is a water gate door, 19 is a float chamber, 11 is a float, 13 is a valve seat, 14 is a rectifier tube, 15 and 16 are guide rods, 3 is external water, 12 is a float valve for preventing backflow, and 20 is a There are drain ports, 2 is internal water, 4 is a water stop plate, and 10 is a partition plate.

Claims (1)

[Claims] 1 A part of the water gate door is used to form a float chamber, and a valve is installed at the upper end of the float chamber to prevent backflow of outside water, the main components of which are a float, a valve seat, a rectifying tube, and a guide rod. A water gate with a built-in float-type backflow prevention valve that has a drain port to outside water at the lower end of the float chamber, allowing inside water to flow down but preventing outside water from flowing back.