JPH0696843B2 - Tipping gate - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tumbling gate for a river, which is disposed in a river bed so as to be able to fall and rise around a horizontal horizontal axis.

2. Description of the Related Art A tumbling type gate that stores or drains water by rotating the door about a horizontal axis of a fixed width to stand or lay it down is dropped because it drains beyond the free end of the door. There is a problem that the generated water collides with the riverbed and the generated drainage noise is large.

Therefore, in the conventional inversion type gate, for example, as shown in FIG. 7, the fixed end bracket 2 of the door body 1 is rotatably supported by a mounting member 3 disposed on the riverbed portion via a horizontal shaft 4. The operating rods 6a of the tilting jacks 6 provided in the mounting holes 5 on the river bed on the downstream side of the door body 1 are connected to the connecting member 7 of the door body 1, and the standing position and the virtual position shown by the solid line in FIG. It is possible to tilt between the lying positions shown by the lines. Door body 1
The partition plate 10 is disposed across the width direction between the front plate 8 and the rear plate 9 at a constant interval, the sand discharging sheet 11 is attached to the inner surface of the rear plate 9, and the partition plate 10 and the sand discharging sheet 11 are The internal flow path 12 is formed therebetween. Between the free ends of the front plate 8 and the partition plate 10, a sloping plate 13 whose partition plate 10 side is inclined toward the fixed end is attached to form an internal flow path inlet 12a over the entire width. A screen 14 for preventing the inflow of floating dust is arranged on the rear plate 9 from the upstream end of the inclined plate 13 at fixed intervals in the width direction of the door body. Further, an inner flow path outlet 12b is formed in the lower end portion of the door body 1 over the entire width.

However, according to the above-mentioned embodiment, the overflow water flows into the internal flow path inlet 12
Although it is dropped from a into the internal flow path 12, dust drifted from the upstream side is left behind on the screen 14, and when the amount increases and covers the screen 14, the overflow water is discharged from the internal flow path inlet 12
There is a problem that the noise of falling water becomes large because it comes to fall directly behind the door body 1 beyond a.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a tumbling type gate in which the accumulation of drifting dust is small and the noise of falling water is small.

Means for Solving the Problems In order to solve the above problems, a first aspect of the invention is to provide a door body in which a fixed end portion is supported by a river bed portion so as to be rotatable about a horizontal axis, and which is capable of standing upside down. An internal channel with an inlet formed at the free end of the body and an outlet formed at the fixed end is provided over the entire width of the door body, and the internal channel inlet is inclined downward from the upstream side to the downstream side. A guide top plate for accelerating the water is provided, and a dust inflow prevention screen is provided at the downstream end of the guide top plate.

A second aspect of the present invention is to provide a door body whose fixed end is rotatably supported on the bottom of the river about a horizontal axis and which can be raised and lowered.
The inlet of the internal flow passage formed in the door body is formed at the free end of the door body over the entire width, and a guide top plate that accelerates the flow by inclining downward from the upstream side to the downstream side is provided at the internal flow passage inlet. In addition, a screen for preventing dust inflow is provided on the downstream side of the guide top plate, a flow section is provided at the end of the door body that is continuous from the inlet of the internal flow path to the outlet of the fixed end, and the flow section is removed at the top of the door body. A detour section is provided for guiding running water to the lower flow section by means of a guide gutter arranged below the screen.

Action In the configuration of the first aspect of the invention, the overflow water that exceeds the door body is guided by the guide top plate at the inlet to be accelerated toward the downstream side, slides down from the screen in the internal flow passage, and is discharged from the outlet. And the garbage that floats with the overflow water
It is accelerated by the guide top plate and is pushed to the downstream end of the screen on the screen and falls over the door body,
It rarely accumulates on the screen, and overflow water does not drop directly over the screen due to dust.

According to the configuration of the second invention, in addition to the operation of the first invention, a part of the overflow water dropped into the internal flow path through the screen slides directly to the outlet at the lower flow portion, Most of them are received by the guide gutter in the detour immediately after falling, and are sent to the lower stream, dropped and discharged from the outlet. Therefore, the falling head of the overflow water and the falling width of the entire height of the door body can be significantly reduced, and the falling noise can be greatly reduced.

Embodiments A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same members as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

A space between a front plate 22 and a rear plate 23 forming the door body 21 is formed in the internal flow path 24, and a guide top plate having a substantially semi-circular cross section is formed on the inner surface of the free end of the front plate 22 at the inlet of the internal flow path 24.
25 is fixed over the entire width of the door and is configured to accelerate the flow of overflow water toward the downstream side. This guide top plate
A large number of screen plates are provided between the downstream end of 25 and the free end of the rear plate 23, which is formed shorter than the front plate 22.
A screen 26 to which 26a is connected is provided. Therefore, the guide top plate 25 causes the overflow water to flow down from the upstream end of the guide top plate 25 by a distance l to give a head of a height h to accelerate the downstream side, and further the screen 26 from the downstream side of the guide top plate 25 to the fixed end. Screen plate that inclines to the side low by 26 m
By a, it is configured to drop the waste that is entrained in the overflow water to the downstream side.

Further, inside the door body 21, internal reinforcing plates 27 are fixed in the thickness direction at regular intervals in the width direction to define the internal flow paths 24. A rubber seal 30 which is in sliding contact with the side surface of the concrete foundation 29 on the upstream side of the end plate 28 at both ends of the door body 21 is attached so as to project in the free end direction from the front plate 22 to prevent water leakage from the gate end. Has been done. Tilting jack 6
The operating rod 6a is a connecting member protruding from the rear plate 23.
It is pin-connected to 31 and prevents the connecting member from overflowing into the internal channel as in the conventional case.

According to the first embodiment, the overflow water is guided by the guide top plate 25 and is greatly accelerated to the downstream side due to its shape and head, so that the entrained dust is pushed backward from the screen 26 and falls, so that the screen 26 It never piles up and closes. Therefore, it is possible to reliably prevent the overflow water from directly falling backward beyond the screen 26 due to dust. Moreover, since the entire space between the front plate 22 and the rear plate 23 is effectively used as the internal flow path 24, there is no risk of blocking the flow of water.

The guide top plate 25 may be a flat inclined plate that inclines downward toward the downstream side.

Next, a second embodiment will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The free end portion of the door body 41 has an arc-shaped guide top plate 25 and the screen 24 over the entire width to form an inlet 42a of the internal flow path 42. At least one end of the door body 41 has an inlet 42a at the fixed end.
An outlet 42b of the internal flow path 42 that is continuous with
2b is a front plate 43 and a rear plate 44.
It is formed in a space surrounded by the end plate 45 and the end plate reinforcing plate 46. On the other hand, in the upper part of the door body 41 excluding the flow-down part 42c, a detour part 42d in which a U-shaped guide gutter 47 is arranged below the screen 26 at a predetermined distance n and is inclined in the horizontal direction or one end side is provided. One end of the guide gutter 47 is connected to the end reinforcing plate 46 via a curved portion 47a that is bent downward in a curved shape, and the detour portion 42d is connected to the flow lower portion 42c. Therefore, the overflow water that has fallen from the screen 26 above the detour 43d is once received by the guide gutter 47 and is guided to the guide gutter 47.
It is guided to the flow-down part 42c from 47, slides down the inner surface of the rear plate 44 with the overflow water dropped from the screen 26 above the flow-down part 42c, and is discharged from the outlet 42b.

The mounting member 48 of the operation rod 6a of the tilting jack 6 is a guide gutter.
It is attached inside the door body 41 below 47, and can be firmly attached without affecting the internal flow path 42.

Further, the door body 1 has a shell structure as a whole, so that the rigidity can be increased.

Reference numeral 49 is a rubber seal which is brought into sliding contact with the fixed end of the door body 1.

By the way, the noise level of the falling water is
The noise level = alogB + blogH + clogh + d (a, b, c, d: constant) is expressed by the overflow water depth h, the door height (falling water head) H, and the door width (falling width) B. Therefore, in order to reduce the noise, the falling head H and the width B may be reduced.

In the second embodiment, since the overflow water is received by the guide gutter 47,
The falling water head H can be made small, and the falling width B can be made small by collecting the overflow water in the flow lower portion 42c at the end of the door body 41, so that the noise level of the falling water noise can be greatly reduced.

As described above, according to the first aspect of the present invention, the dust that crosses the door body together with the overflow water is accelerated by the guide top plate, and is pushed to the downstream side on the screen and dropped to the rear of the screen. There is no accumulation and therefore no overflow water falls directly out of the rear of the door.

According to the second invention, in addition to the effect of the first invention,
Since it is possible to reduce the falling water head and the falling width in the internal flow path of the door body, it is possible to significantly reduce the falling noise.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention. FIG. 1 is a partially cutaway perspective view, FIG. 2 is a partial sectional view of a free end of a door body, and FIGS. The drawing shows the second embodiment, FIG. 3 is a partially cutaway perspective view, FIG. 4 is a partial sectional view of the free end of the door body, and FIG. 5 is a partially cutaway rear view of the door body. FIG. 6 is an explanatory view of falling water noise, and FIG. 7 is a cross-sectional view of a conventional door body. 3 ... Mounting member, 4 ... Horizontal axis, 6 ... Tilt jack,
21 …… door body, 22 …… front plate, 23 …… rear plate, 24 …… internal passage, 25 …… guide top plate, 26 …… screen, 41 …… door body, 42 …… internal passage, 42a ...... Inlet, 42b
...... Exit, 42c …… Lower side, 42d …… Detour part, 45 …… End face plate, 46 …… End reinforcement plate, 47 …… Guide gutter.

Claims (2)

[Claims] Claim: What is claimed is: 1. A fixed end is rotatably supported on a river bed around a horizontal axis to provide a door body that can be erected and tilted. An inlet is formed at the free end of the door and the fixed end is provided at the fixed end. An internal flow passage with an outlet is provided over the entire width of the door body, and a guide top plate that accelerates the flow by sloping downward from the upstream side to the downstream side is provided at the inlet of the internal flow passage and dust flows into the downstream end of the guide top plate. A fall-type gate with a screen for prevention. 2. A door body, which has a fixed end rotatably supported around a horizontal axis on the bottom of a river and is capable of standing up and down, is provided with an inlet of an internal flow passage formed in the door body at a free end of the door body. Is formed over the entire width of the door, and a guide top plate that accelerates the flow by sloping downward from the upstream side to the downstream side is provided at the inlet of this internal flow path, and a dust inflow prevention screen is provided on the downstream side of the guide top plate. At the end of the internal flow path, a flow path is continuously formed from the inlet of the internal flow path to the outlet of the fixed end. A fall-type gate that features a section.