KR100653611B1 - Covered type aeration apparatus for dam spillway - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air inlet device installed on the bottom of a channel of a channel of a waterway-type Yeosu channel. Effective air intake is possible without.

Through the present invention it is possible to solve the problem of the destruction of the air slot and the water passing capacity and stability of the airway, which was the biggest problem of the conventional air exposure system of the airway type exposure air slot method, thereby improving the durability of the waterway The effect of improving the efficiency of dam operation can be obtained.

Dam, Yeosu-ro, Air Mixing

Description

Covered type aeration apparatus for dam spillway

1 is a representative cross-sectional view of a conventional Yeosu-ro

2 is a partially cut perspective view of a conventional channel

Figure 3 is a representative cross-sectional view of the Yeosu channel to which the present invention is applied

Figure 4 is a partially cutaway perspective view of the channel to which the present invention is applied

Figure 5 is a cross-sectional view of the main portion of an embodiment of the present invention to which the downward effluent is applied

<Code Description of Main Parts of Drawing>

10: Yeosu-ro

11: sidewall

19: air slot

21: cross pipe

22: intake pipe

23: fire engine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air inlet device installed on the bottom of a channel of a channel of a waterway-type Yeosu channel. Effective air intake is possible without.

Yeosu-ro is a facility for discharging large quantities of water above a certain level for the safety of reservoirs. The incoming flood must be discharged downstream without damaging the dam structure or auxiliary facilities. It is divided into two types: door-type and non-word-type, and according to hydraulic characteristics, it is divided into water channel and freeway according to hydraulic characteristics.

Such a waterway, especially a waterway-type waterway, discharges a large amount of water in a short time, so that a very high flow rate and flow rate are generated. Therefore, the influence on the related hand structure also has a different aspect from the general waterway structure.

In particular, when the water pressure is lower than the vapor pressure due to the high velocity, the internal gas is separated to form bubbles, and when the bubble moves to a high water pressure, it collapses to surrounding water pressure and damages the surrounding structure. cavitation occurs, and in places where large flows with high flow rates occur, such as a channel, when a flow of pressure lower than atmospheric pressure occurs, a kind of vacuum is formed at the interface between the structure and the water stream, resulting in peeling of concrete, etc. Separation occurs.

Therefore, in the large runway, in order to prevent damage to the runway caused by the above-mentioned phenomenon, an air inlet device is provided so that outside air can be supplied to the lower portion of the water stream by forming a slot at some dangerous points. An air inlet device is shown in FIGS. 1 and 2.

As can be seen from Figures 1 and 2, the conventional air mixing apparatus is composed of a groove-shaped air slot (19) that crosses the channel 10 including a side wall (11), It has a structure where the top is completely exposed.

However, since the conventional air slot 19 acts as a kind of discontinuity at the interface between the high speed water flow and the channel, it has a problem that it can act as a structural weak part as well as impair the water-permeability.

That is, when the water flow collides with the exposed air slot 19, the water flow is disturbed, and at the same time, an impact is applied to the structure of the channel 10. In theory, when the flow of the channel 10 flows at high speed, the air slot for air mixing is generated. (19) In the vicinity, the water flow is considered to be formed in a floating state spaced apart from the water channel, but in fact, irregular flow is frequently caused by various elements as well as floats or drifts, and thus, the air slot 19 is formed in the waterway (10). There was a very big problem that is likely to act as a structural weak point.

In particular, the frequency of use and length of use of the Yeosu channel 10 are prolonged due to the recent increase in flood volume due to abnormal weather. Thus, the long-term use of the Yeosu channel 10 causes repeated impacts around the air slots 19. This can cause serious structural problems throughout Yeosu 10 if it acts as a fatigue load.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and in constructing an air inlet device in a waterway, a transverse pipe crossing the waterway is embedded in the bottom of the waterway, and an intake pipe and a plurality of effluent pipes are provided on the horizontal pipe. The air sucked through the air can be supplied to the interface between the water flow and the channel through the transverse pipe and the duct.

In addition, in the construction of the air duct, the connection between the air duct and the horizontal pipe is made higher than the air discharge end of the air duct so that water does not flow into the horizontal pipe, and the angle between the flow direction of the overflowed water and the air discharge direction is minimized. To maximize the efficiency of air discharge and minimize the disturbance of water flow.

The detailed configuration of the present invention through the accompanying drawings as follows.

As can be seen from Figures 3 and 4, there is no groove exposed to the bottom and side walls 11 of the channel 10, as can be seen through the enlarged portion of the circle of Figure 4, The horizontal pipe 21 and the intake pipe 22 which are respectively embedded in the bottom surface and the side wall 11 of the channel 10 are connected to each other, and a plurality of air discharge pipes 23 are installed in the horizontal pipe 21 to provide the intake pipe 22. Air sucked through is discharged to the interface between the channel 10 and the overflow water through the effluent pipe (23).

Therefore, due to the flow rate of the water flow lowered at the high flow rate and the pressure difference between the interface between the waterway 10 and the overflow water and the opening of the intake pipe 22, the air is sucked and discharged to the effluent pipe 23, the water channel (10 Disturbance and impact of the water flow due to the structure such as the air slot (19) traversing the whole is not to occur.

Such a buried pipe-type air mixing device of the present invention can be installed by placing concrete after mounting the pre-assembled tubular body at the time of construction of the waterway 10, the end of the exhaust pipe 23, that is, of the air The outlet shape is formed in an oblique line so as to match the bottom of the waterway 10 so as to minimize disturbance of the overflow water.

Meanwhile, FIG. 5 illustrates an embodiment in which the exhaust pipe 23 has a downward inclination and the connection portion between the horizontal pipe 21 and the air pipe 23 is positioned higher than the outlet of the air pipe 23. 23) by minimizing the angle between the air discharged through the water and the overflow water can increase the mixing efficiency of the air and minimize the disturbance of the overflow water, as well as the horizontal pipe (21) in the usual discharge of the discharge of the waterway (10) And it is possible to prevent the accumulation of water in the duct 23 to prevent corrosion of the transverse pipe 21 and the duct 23.

As a result, the technical gist of the present invention is that in the channel-type freeway 10 installed in the dam, the transverse pipe 21 provided with a plurality of air discharge pipes 23 at predetermined intervals is the bottom of the freeway 10 Is embedded in, but at least one end of the both ends of the transverse pipe 21 is connected to the intake pipe 22 is located in the upper side of the overflow surface, the air sucked through the intake pipe 22 is connected to the transverse pipe 21 and A buried pipe-type air mixing device of a dam freeway, characterized in that it is discharged to the water flow flowing over the freeway (10) through the discharge pipe (23), the air discharge end of the discharge pipe (23) and the transverse pipe (21) It is a buried pipe-type air mixing device of the dam channel, characterized in that located at an elevation below the connection of the engine (23).

Through the present invention it is possible to solve the problem of the destruction of the air slot and the water passing capacity and stability of the airway, which was the biggest problem of the conventional air exposure system of the airway type exposure air slot method, thereby improving the durability of the waterway The effect of improving the efficiency of dam operation can be obtained.

Claims (2)

In the channel-type freeway 10 installed in the dam, The transverse pipes 21 in which a plurality of effluent pipes 23 are installed at predetermined intervals are embedded in the bottom of the Yeosu channel 10; At least one end of both ends of the transverse pipe 21 is connected to an intake pipe 22 having an upper opening located above the overflow surface; A buried pipe-type air mixing device of a dam freeway, characterized in that the air sucked through the intake pipe (22) is discharged to the water flow flowing through the freeway (10) via the transverse pipe (21) and the discharge pipe (23). The method of claim 1, wherein the air discharge end of the exhaust pipe (23) is located at an elevation below the connection portion of the cross pipe (21) and the exhaust pipe (23).

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