JPS6294612A - Bearing structure of water-control gate - Google Patents

Abstract

PURPOSE:To obtain a water-control gate free of cavitation caused by gate grooves by a method in which gate-catch faces inclined to the direction of flow are provided on both sides of a dam and a roller-type gate is supported by the gate-catch faces. CONSTITUTION:The width of a dam 3 is slightly increased, and gate-catch faces 5 inclined at about 45 deg. to the direction 4 of flow are formed on a dam 3. Tracks 6 are laid on the gate-catch faces 5, and sealed faces 7 are provided to the dam 3. Rollers 8 are contacted with the tracks 6 to support the gate 10 on the gate-catch faces 5. Since no cavitation and stagnation by gate grooves take place because of absence of the gate grooves, a water control gate 1 allowing smooth flow of water can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support structure for a water control gate used under high water depths.

[Prior Art] A conventional roller type or slide type water control gate has a structure in which door grooves are provided on both sides of a waterway, and the gate is supported by the door grooves.

4 to 7 are drawings showing conventional examples of support structures. FIG. 4 shows a roller-type gate 51, in which a track 54 is laid on the door stop surface 53 of the door groove 52, and a roller 56 attached to the door body 55 is rotated by the track 54.
1 is raised and lowered to open and close, and the load acting on the door body 55 due to water pressure is supported by rollers 56, and this load is transmitted to the door stop surface 53.

Also, on the upstream side of the door body 55, a seal 57 is provided between the door groove 52 and the door groove 52.
The water in the gate 51 is maintained by installing the . Furthermore, the wall surface on the downstream side of the door stop surface 53 forms an inclined surface 58 in the flow direction in order to prevent eddies caused by the door arm 52.

The gate 61 shown in FIG. 5 has the same structure as the one shown in FIG. 4, but a constriction part 63 is provided on the wall of the waterway on the upstream side of the doorway 62 to increase the speed of water flow near the doorway 62. ,
The water flow is prevented from being affected by the door groove 62.

Further, the roller type gate 71 shown in FIG.
A cover plate 74 is provided between the door bank 73 and the door bank 73 to close the door bank 72, thereby reducing the influence of the eddy current caused by the door bank 72 and allowing water to flow down smoothly.

FIG. 7 is a drawing showing the support oval structure of the sliding type gate 81, and like the roller type gate, the door groove 82
The door stop surface 83 supports the load acting on the door body 84, and the sliding surface 85 slides the gate 81 to open and close the door. A seal 86 is installed between the gates 81 and 81 to keep the gate 81 watertight.

[Problems to be Solved by the Invention] However, in a gate with such a support structure, water accumulates in the doorway, and especially under high pressure and deep water, this accumulation and vortex flow in the doorway can cause cavitation. In addition to impeding water flow, this cavitation was having a negative impact on structures such as gates. Another problem is that quicksand and the like accumulate within the doorway, making the operation of the gate unstable and requiring a lot of effort to discharge the accumulated sediment.

The present invention solves the above problems and provides a support structure for a water control gate that prevents the occurrence of cavitation and allows water to flow down smoothly.

[Means for Solving the Problems] The present invention is characterized in that doorstop surfaces are formed on both sides of the embankment body at an angle of inclination with respect to the flow direction, and the gate is supported on the doorstop surfaces. It is something to do.

[Function] In this way, the water passing through the gate flows down smoothly along the doorstop surface, thereby preventing the accumulation of quicksand and the occurrence of cavitation due to turbulent flow.

[Example] Embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a first embodiment, and is a diagram illustrating a support structure of a roller-type water control gate 1. As shown in FIG.

2 is a flow channel, and the position where the water control gate 1 is installed is gently sloped, and the embankment body 3 is slightly widened, and then has an inclination angle of about 45° with respect to the flow direction 4. A doorstop surface 5 is formed, and the downstream side thereof is slightly narrower than the upstream side. On this doorstop surface 5 is a truck 6,
A seal surface 7 is provided on the embankment body 3 located on the side surface of the water control gate 1, and a roller 8 and a seal 9 attached to the gate 1 side are in contact with each other. In this way, the door body 1o is
The load acting on the doorstop is transmitted to the embankment body 3 via the door stop surface 5, and watertightness is maintained by the seal 9 and the seal surface 7. In addition, the flow of water when water control gate 1 is opened is as follows:
It flows down along the doorstop surface 5.

FIG. 2 shows a second embodiment, and is a diagram illustrating a support structure for a sliding type water control gate 21. Reference numeral 22 denotes a flow channel, and as in the previous embodiment, the position where the water control gate 21 is installed is gently sloped, the embankment body 23 is slightly widened, and the width is about 45 mm with respect to the flow direction 24. A door stop surface 25 is formed with an inclination angle of '', and the downstream side thereof is slightly narrower than the upstream side.

A track 26 is provided on the door stop surface 25, and a seal surface 27 is provided on the embankment body 23 located on the side surface of the water control gate 21.
8 and a seal 29 are in contact with each other. In this way, the sliding surface 28 and the track 26
The load acting on the door stop surface 25 is transmitted to the embankment body 23 through the doorstop surface 25, and water is kept by the seal 29 and the seal surface 27. Further, when the water control gate 21 is opened, the flow flows down along the door stop surface 5.

Another feature of the present invention is that the door body 10.30
The load acting on the door stop surface 5.25 acts at right angles to the door stop surface 5.25, but since the door stop surface 5.25 is inclined with respect to the flow direction 4.24, the door stop surface 5.25 acts on the door stop surface 5.25 as shown in FIG. The load 31 acting on the embankment body 3.25 acts inward on the embankment body 3.23, and its component force 31m does not act as a shearing force that would destroy the embankment body 3.23.Therefore, the gate 1.21 It is stably supported by the embankment body 3.23.

Further, in the first and second embodiments described above, the flow channel 2.
Since the upstream side of each of the gates 1 and 22 becomes narrower toward the upstream side, it is possible to reduce the size of a preliminary gate (not shown) provided upstream of the flow channel.

[Effects of the Invention] As explained above, in the present invention, the door stop surface is formed to be inclined with respect to the flow direction, and the gate is supported by this door stop surface, so that the flow of water passing through the gate is flows down smoothly along the doorstop surface, so even under high-pressure deep water, cavitation will not occur due to stagnation or eddies, and quicksand will not accumulate.

Furthermore, the load supporting the gate acts inward on the embankment body,
The gate is stably supported by the embankment without applying excessive force to the embankment.

[Brief explanation of drawings]

FIG. 1 is a drawing explaining the support structure of the first embodiment of the present invention, FIG. 2 is a drawing explaining the support structure of the second embodiment,
Figure 3 is a vector diagram explaining the load acting on the door stop surface, Figures 4 to 7 are conventional examples, Figures 4, 5, and 6 are roller type gates, and Figure 7 is a vector diagram explaining the load acting on the door stop surface. is a drawing explaining the support structure of a sliding gate.

Claims (1)

[Claims] A support structure for a water control gate, characterized in that a doorstop surface is formed on both sides of an embankment body at an angle of inclination with respect to the flow direction, and a gate is supported on the doorstop surface.