JPS5841218Y2 - Overflow type radial gate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an overflow type radial gate that is installed in the middle of a spillway discharging channel that is always at the full water level (or limited water level).

In the flood control dam shown in FIG. 1, the design flood level A is handled by operating a spillway gate 2 provided corresponding to the upper end rest 1A of the dam body 1.

In dams whose purpose is to control floods,
During seasonal flood periods (rainy season, typhoon season, snowmelt season, etc.), the water level is always lowered to the full water level B (planned water level, restricted water level, etc.) in advance to cope with water outflow during the flood season.

That is, the constant full water level B is dealt with by operating the main gate 4 of the water discharge pipe 3 provided at the lower part of the dam body 1.

5 indicates a preliminary gate of the water discharge pipe 3.

In this case, the water discharge pipe 3, main gate 4, etc. that perform the spillway function are always installed at a position below the full water level B. Therefore, floating objects such as driftwood are stored at the level of the full water level B. , the current situation is that we are having trouble processing it.

On the other hand, it is strongly desired that the water discharged downstream be the surface water stored in the dam.

In recent years, in order to meet such demands, a spillway 6 has been installed at the level of the full water level B to discharge the surface water of the dam reservoir, and at the same time discharge the washed-up material stored on the upstream side of the dam. It has been considered that the water can also be flowed down.

That is, a radial gate 7 is provided in the middle of the spillway 6 for discharging spillwater, and by moving the radial gate 7 upward, the spillway 6 for discharging the spillwater is opened and allowed to flow down.

8 shows the preliminary gate of the drainage channel for Yusuisha.

Incidentally, since the floating material flowing out of the Yusuisha drainage channel 6 flows through the upper part of the Yusuisha drainage channel 6, when water is discharged with the radial gate 7 slightly opened, the radial gate 7
One piece of debris hangs on the bottom of the skin plate, making it impossible for it to flow down.

For this purpose, the heavy radial gate 7 must be pulled up completely, that is, by more than the required amount, which increases power consumption, and furthermore, this means that the full water level B cannot be maintained at all times.

In addition, drifting matter caught on the inner surface of the radial gate 7
When pulling up the radial gate 7, it may get caught between the skin plate and the seal rubber, for example.
This will hinder the vertical movement of the radial gate 7.

In view of this, as a method that enables smooth outflow of garbage while constantly controlling the full water level B, a method can be considered in which the radial gate 7 is pulled down (dropped) to perform spillover by overflow.

However, the problem with this method is that the overflowing water collides with the floating objects and the main girders and auxiliary girders placed on the legs supporting the radial gate 7 and the back of the skin plate, causing both hydraulic and structural problems. This is inconvenient, and part of the switchgear (rod, etc.) may be hit by floating objects or running water, which may interfere with the intended operation.

The present invention proposes an overflow type radial gate that can solve the above problems, and one embodiment thereof will be described below with reference to FIGS. 2 to 4.

1 is the dam body, and 6 is the spillway for Yusuisha.

The middle of the Yusuisha discharge channel 6 is formed into a widened part 6A,
A door body 9 is provided here.

That is, 10 is a skin plate, and sufficiently long fan-shaped side current plates 11 A and 11 B are attached upwardly on both sides of the skin plate.

On the back of the skin plate 10, there are main girders and auxiliary girders 12.
The overflow rectifying plate 13 is attached through the side rectifying plates 11A and 11B, and a plurality of legs 14A are installed on the outside of the side rectifying plates 11A and 11B, respectively.
, 14B are provided, thereby forming the door body 9.

In this door body 9, the assembly of legs 14A and 14B, which are the main parts of the fan, are attached to brackets 16A and 16B on the dam body 1 side via horizontal pins 15A and 15B.

A recess 17 into which the skin plate 10 can be fitted is formed on the bottom surface of the waterway 6, and when the door body 9 is lowered, the skin plate 10 is fitted into the recess 17 to open and rise. It is designed so that it can be closed by moving.

In addition, when the skin play 10 is completely fitted into the recess 17, the bottom surface of the spillway discharge channel 6 and the overflow rectifying plate 13 are configured to be flush with each other.

As a result, a spill eyelet 18 is formed between the inner surfaces of the side baffle plates 11A and 11B above the skin play 10, and the width of this spill eyelet 18 is the same as that of the skin play 10 upstream. It is formed to be equal to or slightly larger than l in the discharge channel, that is, [L≧l].

Reference numeral 19 denotes a cylinder device which is an example of an opening/closing device provided in the operation room 20, and includes a cylinder body 24 attached to a receiving part 21 integrated with the dam body 1 via a bearing 22 and a horizontal pin 23, its piston rod 25, etc. The lower end of this piston rod 25 is connected to the upper tip of the door body 9 via a horizontal shaft 26.

27 indicates an inspection gallery, and 28 and 29 indicate air pipes, respectively.

Figures 2 and 3 show a state where no spillway is being formed.

That is, the cylinder device 19 is contracted, and the water discharge channel 6 is completely blocked by the skin spray 10.

When performing a spill discharge from this state, the cylinder device 10 is extended to swing the door body 9 downward around the horizontal pins 15A and 15B, and the skin plate 10 is lowered.

Then, as shown in FIG. 4, since the spillway eyelet 18 communicates with the upper side of the spillway 6, it is possible to smoothly drain the floating material even if it is not fully opened.

In addition, the side baffle plates 11A and 11B, which form a spillway width that is equal to or slightly larger than the inside of the waterway, allow overflowing water and washed-up substances 14A and 14.
Prevent collision with B etc.

As described above, according to the present invention, the spillway is constructed by lowering (dropping) the door body and communicating the spillway from the upper side of the spillway, so that the spillovers are The water can flow out smoothly without getting caught on the door body, and this condition can be expected without having to fully open the door body, which means that power consumption can be reduced.

In addition, we have installed a side baffle plate that forms a spillway width that is equal to or slightly larger than the waterway width, so there is no possibility that overflowing water or floating objects will collide with the legs, etc. can.

Furthermore, an overflow current plate is used to prevent overflow.
Water and drifting debris can flow down smoothly.

Furthermore, since the door body is attached to the dam body via the legs, the hydraulic load that the door body receives can be safely transmitted to the dam body.

By connecting an opening/closing device to the upper end of the side baffle plate, it is possible to prevent running water from hitting the opening/closing device even when the door body is fully opened.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing a general example of an arch dam, Figs. 2 to 4 show an embodiment of the present invention, Fig. 2 is a longitudinal side view of the main parts showing the closed state, and Fig. 3 2 is a cross-sectional plan view of the main part in FIG. 2, and FIG. 4 is a vertical cross-sectional side view of the main part showing the opened state. 1... Dam body, 6... Spillway discharge channel, 9... Door body, 10... Skin plate, 11 A, 11 B. ...Side rectifier plate, 1
3...Overflow rectifying plate, 14A, 14B...
・Leg, 17... Recessed part, 18... Yumizumame, 19... Cylinder device (opening/closing device), B.
...Constantly full water level, L...Leftwater opening width, L
・・・・・・Waterway width.

Claims (1)

[Scope of utility model registration request] This is an overflow type radial gate that is installed in the middle of a spillway discharge channel that is always set at the full water level, and has side flow plates that are sufficiently long upward on both sides of the skin plate, and on the back side of the skin plate. A gate body is constructed by providing an overflow current plate, and this door body is attached to the dam body so as to be openable and closable via legs provided on the outside of the side current plate, and the door body is opened by swinging downward. 1. An overflow type radial gate, characterized in that the width between the inner surfaces of the side baffle plate is equal to or slightly larger than the width of the waterway upstream of the skin plate.