JPS5841217Y2 - drop gate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drop gate for a spillway discharging channel provided at a constant full water level.

In the flood control dam shown in FIG. 1, the design flood level A is handled by operating the spillway gate 2, which is provided in correspondence with the upper end rest IA of the dam body 1.
Moreover, the constant full water level B is dealt with by operating the main gate 4 of the water discharge pipe 30 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, so debris such as driftwood accumulates at the level of the always full water level B, and it is difficult to dispose of it. The current situation is troubling.

Recently, in order to eliminate such problems, an idea has arisen to provide a spillway discharge channel 6 at the level of the full water level B and use it as a spillway to simultaneously flush out the garbage.

That is, a roller gate 7 is provided in the middle of the spillway discharge channel 6, and this roller gate 7 is pulled up to open the spillway discharge channel 6 and allow water to flow out.

8 shows the preliminary gate of the spillway discharge channel.

Incidentally, since the debris flowing out of the spillway discharge channel 6 flows through the upper part of the spillway discharge channel 6, when water is discharged with the roller gate 7 slightly pulled up, the debris gets caught on the inner surface of the roller gate 7. It becomes a state where it cannot flow out.

For this purpose, the heavy roller 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 always be ensured.

Moreover, the dust caught on the inner surface of the roller gate 7 will be caught in, for example, the roller portion when the roller gate 7 is pulled up, which will impede the vertical movement of the roller gate 7.

From this, a possible method that allows for smooth outflow of garbage while constantly controlling the full water level B is to pull down (drop) the roller gate 7 and perform spillover by overflow.

However, the problem with this type is that overflow water flows along the top of the door body and flows into the door groove, and at that time, dust also flows in at the same time, and that the water hits the opening/closing device (rope and cylinder) For example, it may interfere with the operation.

The present invention proposes a drop gate that can solve the above problems, and one embodiment thereof will be described below with reference to FIGS. 2 to 5.

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

From both ends of the upper surface of the gate main body 9 provided in the middle of the spillway discharge channel 6, a pair of left and right rectifying columns 10A and IOB are provided upward, and a beam 11 is provided between the upper ends of the rectifying columns 10A and IOH. installed.

As a result, a spillway joint 12 is formed above the gate main body 9, and the width of this spillway joint 12 is equal to or slightly larger than the inside of the spillway of the spillway 6. That is, [L≧l].

The height is also the same, and the top and bottom surfaces of the spillway joint 12 are formed to match the curve of the spillway waterway 6.

A plurality of rollers 13A, 13B are attached to the outer surfaces of the gate body 9, the rectifying column 10A, and the IOB, and these rollers 13A.

Gate grooves 14A and 14B for guiding the gate 13B are attached to the dam body 1, and the gate body 9 is of a roller gate type that can be moved up and down.

Reference numeral 15 denotes a cylinder device, which is an example of an opening/closing device, and is composed of a cylinder body 16 attached to the dam body 1, a piston rod 17, etc., and the lower end of the piston rod 17 is connected to the beam 11 via a horizontal shaft 18. ing.

An air box 19 is provided at the lower part of the spillway discharge channel 6 downstream of the drop gate configured as described above.

In Figures 2 and 3, 20 is an operation room, 21 is a pit,
22 is a gate chamber, 23 is an inspection gallery, and 24 is a drain pipe.

Further, in FIG. 4, 25 and 26 indicate water stop rubber.

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

That is, the cylinder device 15 is contracted, and the spillway 6 is completely closed by the gate body 9.

When performing a spill discharge from this state, the cylinder device 15 is extended and the gate body 9 is lowered.

Then, as shown in FIGS. 5 and 6, since the spillway joint 12 communicates with the upper side of the spillway discharge channel 6, the garbage can be smoothly flowed out even if it is not fully opened.

Further, the rectifying column 10A forms a spillway opening width that is equal to or slightly larger than the inside of the waterway.

10B, the overflow water is transferred to rail 14A.
, 14B, there is no fear that the dust will flow to the rollers 13A, 13B or the door grooves 14A, 14B.

Note that when the gate body 9 is opened half-open, a step is formed at the lower end of the gate body 9 and a negative pressure is generated, but this is prevented by the air sucked and supplied from the air box 19.

FIG. 7 shows another embodiment in which the height of the spillway discharge channel 6 is increased downstream of the drop gate, and in this case, the upper surface of the spillway spout 12 can be made horizontal.

FIG. 8 shows another embodiment in which the beam 11 is not used, and in this case, a pair of cylinder devices 15 are provided that are connected to the upper ends of both the rectifying columns 10A and IOB.

As described above, according to the present invention, the spillway is constructed by lowering (dropping) the gate body and communicating the spillway joint from the upper side of the spillway discharge channel, so that the dust is removed from the gate body. The water can flow out smoothly without being pulled by the gate, and this state can be expected without having to fully open the gate body, which means that power consumption can be reduced.

In addition, since we have installed a rectifying column with a spillway width that is equal to or slightly larger than the inside of the waterway, it is possible to completely eliminate the possibility of dust getting caught on the inside of the rectifying column, and furthermore, the overflow water can be drained into the doorway. Since the rectifying column prevents the dust from flowing to the side, it is possible to prevent dust from getting caught in the door groove, and it can be made so that it does not affect the opening/closing device in any way.

Furthermore, when discharging water, there is no door groove, so no vibration occurs in the drop gate, and the overflow surface of the spillway can be shaped to match the discharge curve.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing a general example of an arch dam, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is a longitudinal side view of the main parts when fully closed, and Fig. 3 is a longitudinal side view of the main part when fully closed. C- in Figure 2
C sectional view, Fig. 4 is a cross-sectional plan view of the main part, Fig. 5 is a vertical sectional side view of the main part when fully opened, and Fig. 6 is D in Fig. 5.
-D cross-sectional view, FIG. 7 is a vertical cross-sectional view of a main part showing another embodiment, and FIG. 8 is a rear view showing another embodiment. 1... Dam body, 2... Spillway gate, 3... Water pipe, 4... Main gate, 6
... Spillway waterway, 7 ... Roller gate, 9 ... Gate body, 10 A, 10 B
... Rectifying column, 11 ... Beam, 12 ...
...Spill water joint, 15...Opening/closing device (elevating drive device), 19...Air box, B...Always full water level, L...・Spill water opening width, l...Inside the spillway.

Claims (1)

[Scope of utility model registration request] This is a drop gate for a spillway discharge channel that is always set at the full water level.This drop gate is installed in the middle of the spillway discharge channel, and rectifying columns are provided upward from both ends of the gate body. The width of the spillway joint formed between the inner surfaces of the straightening pillars was made equal to or slightly larger than the width of the spillway, and an air box was also installed at the bottom of the spillway downstream of the drop gate. A drop gate characterized by: