JPH093862A - Shell gate with drum - Google Patents

Abstract

PURPOSE: To prevent low frequency oscillations generated by overflow water veins and prevent noises generated by dropping of the overflow water into the water level and further, prevent extinction of fry or the like resulting from the impulses of dropping water of the overflow and make it possible to use the gate in both cases of the water pressure acting from the upstream or the downstream. CONSTITUTION: A drum 2 for overflow used as a child gate rotatably installed at the upper part of a shell is rotated to cope with the variation of the water level and adjust the height of the shell gate with the drum. The overflow water from the drum is led along the rear face of the drum for overflow and the opposite face to the water reservoir side of the shell 1 to prevent the overflow water from freely dropping to the downstream water level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum-equipped shell gate applied to a water gate or the like.

[0002]

2. Description of the Related Art A conventional flap-equipped shell gate is shown in FIG. 5, and a conventional undulating shell gate is shown in FIG. First, the shell gate with flaps of FIG. 5 will be described. 12 is a shell portion, 13 is a flap portion pivotally supporting the lower end portion of the shell portion 12, and the flap portion 13 is swung to adjust the height of the shell portion 12. The overflow water is adjusted to be freely dropped from the upper end portion of the flap portion 13 and is allowed to flow downstream.

Next, the undulating shell gate shown in FIG. 6 will be described. Reference numeral 14 is a torque shaft, 15 is a lower support portion for rotatably supporting the torque shaft 14 on the shell portion 12, and 16 is attached to the torque shaft 14. Skin plate, 17 is an auxiliary cross beam of the skin plate 16, and 18 is the skin plate 16
Spoiler, 19 is an intermediate stringer of the skin plate 16,
Reference numeral 20 is a bottom watertight rubber, 21 is a side door contact, 22 is a torque arm fixed to one end of the torque shaft 14, 23 is a hydraulic cylinder connected to the torque arm 22, and the hydraulic cylinder 23 is operated in the expansion / contraction direction. The skin plate 16 is undulated around the torque shaft 14, the height of the shell portion 12 is adjusted, the overflow water is allowed to freely fall from the upper end portion of the skin plate 16, and is allowed to flow downstream.

[0004]

In the conventional shell gate shown in FIGS. 5 and 6, the overflow water is allowed to freely fall from the upper end of the flap portion 13 or the skin plate 16 and flow to the downstream side. There was a problem. That is, (1) low-frequency vibration occurs in the overflow water vein during free fall, and when the free fall overflow water falls directly on the water surface on the downstream side, noise is generated and the floodgate near the city Etc., noise is a problem. (2) There has been a problem that fry and the like are killed by the impact when the free-falling overflow water directly drops on the downstream water surface.

The present invention has been made in view of the above problems, and its object is to prevent low-frequency vibration generated by an overflow water vein and to occur when the overflow water is landed. A shell gate with a drum can be used to prevent noise and prevent the death of fry and other fish that have been caused by the impact of overflow water landing, and can be used when the water pressure is applied from the upstream side or the downstream side. There is a point to offer.

[0006]

In order to achieve the above object, a shell gate with a drum of the present invention comprises a shell portion,
It has an overflow drum part rotatably provided on the upper part of the shell part, and prevents the overflow water from separating from the back face of the overflow drum part and the back surface of the shell part on the side opposite to the water storage side and freely falling to the downstream water surface. Is formed (claim 1).

In the shell gate with a drum according to the first aspect, the shell portion is movably supported by the piers on both sides via shell support portions provided at both ends thereof, and the overflow drum portion is provided in the shell support portion. A rotation drive device may be provided, and a lifting wire rope may be attached to each shell support (claim 2). The shell gate with a drum according to claim 1 or 2, wherein a pressure plate is provided between the shell portion and the overflow drum portion, and a watertight rubber is provided on the water storage side between the shell portion and the overflow drum portion. A dustproof rubber may be provided on the water storage side (claim 3).

[0008]

The drum shell gate of the present invention is constructed as described above, and the overflow drum portion as a child gate rotatably provided on the upper portion of the shell portion is rotated so as to respond to the fluctuation of the water level. , Adjust the height of the shell gate with drum. Then, the overflow water overflowing from the overflow drum portion is caused to flow down along the back surface of the overflow drum portion and the anti-reservoir side surface of the shell portion to prevent the overflow water from freely falling to the downstream water surface.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a shell gate with a drum according to the present invention is shown in FIGS.
Explaining with one embodiment shown in FIG. 3, 1 is a shell part,
3 is a shell support portion provided at both ends of the shell portion 1, 2 is an overflow drum portion rotatably provided above the shell portion 1, and 3'is an overflow drum provided in each shell support portion 3 The rotary drive device for the drum unit 2 is the same as the rotary drive device 3 ′ shown in FIG.
As shown in (b), it is composed of a torque arm 9 attached to the torque shaft 10 on one end side of the overflow drum portion 2 and a hydraulic cylinder 11 connected to the torque arm 9.

Reference numeral 4 denotes a wire rope attached to each of the shell supporting portions 3, and 5 denotes piers on both sides. The wire rope 4 is used to move up and down each shell supporting portion 3 and the overflow drum portion 2. . 7 is a bearing plate provided between the shell portion 1 and the overflow drum portion 2, 8 is a watertight rubber provided on the water storage side between the shell portion 1 and the overflow drum portion 2,
Reference numeral 6 is a dustproof rubber provided on the side opposite to the water storage, and transfers the load of the overflow drum portion 2 to the shell portion 1 by the pressure bearing plate 7. The watertight rubber 8 closes the water storage side between the shell portion 1 and the overflow drum portion 2 in a watertight manner. Further, the dustproof rubber 6 prevents dust or the like from entering between the shell portion 1 and the overflow drum portion 2.

Next, the operation of the shell gate with a drum shown in FIGS. 1 to 3 will be specifically described. The overflow drum portion 2 as a child gate rotatably provided on the upper portion of the shell portion 1 is rotated so as to correspond to the fluctuation of the water level, and the height of the drum-equipped shell gate is adjusted (Fig. 3 (a) ( See b)).
The overflow water overflowing from the height-adjusted overflow drum portion 2 is caused to flow down along the anti-reservoir side surface (back surface) of the shell portion 1 so that the overflow water does not directly fall to the downstream water surface.

Normally, the anti-reservoir side surface (rear surface) of a dam strictly determines its shape so as not to cause a harmful pressure drop on the overflow surface, but in the case of a shell gate with a drum, the water pressure and the amount of water are small. So the pressure drop is not a problem. Also, in order to make the overflow water flow down along the anti-reservoir side surface (rear surface) of the shell part 1, the overflow water flow is formed by its free fall curve (the curve drawn by the overflow water flow when there is no back surface: close to a parabola). Since it may be located outside the curved line (see FIG. 4A), even if the back surface (anti-water storage side surface) of the shell portion 1 is linear as shown in FIGS. 4B and 4C, the back surface of the shell portion 1 If the contact angle of the overflow drum portion 2 with respect to the overflow drum portion 2 is larger than the contact angle of the free fall curve, the overflow water flow will flow down along the back surface of the shell portion 1, but the overflow drum portion 2 on the back surface of the shell portion 1 Since the contact angle with respect to is determined by the amount of overflow water, it can be obtained from the amount of overflow water required by the equipment.

[0013]

As described above, in the shell gate with drum of the present invention, the overflow drum portion as a child gate rotatably provided on the upper portion of the shell portion as described above is rotated so as to correspond to the fluctuation of the water level, and is attached to the drum. Adjust the height of the shell gate. Then, since the overflow water overflowing from the overflow drum portion is caused to flow down along the back surface of the overflow drum portion and the anti-water storage side surface of the shell portion, it is possible to prevent the low frequency vibration generated by the overflow water vein.

Further, as described above, the overflow water overflowing from the overflow drum portion is allowed to flow down along the back surface of the overflow drum portion and the anti-water storage side surface of the shell portion so that the overflow water does not fall freely to the downstream surface. It is possible to prevent the noise generated when the overflow water arrives. Further, as described above, the overflow water overflowing from the overflow drum portion is allowed to flow down along the back surface of the overflow drum portion and the anti-reservoir side surface of the shell portion, so that the overflow water does not freely fall to the downstream water surface. It is possible to prevent the death of fry and the like that were caused by the impact when landing.

In addition, not only the water pressure is applied not only from the upstream side but also from the downstream side when the tide is high, the sluice gate, which is installed in the middle stream of the river, the estuary weir on which the tide level and waves act, and the tsunami countermeasure sluice The conventional shell gate with flap and the undulating shell gate can be used when the water pressure is applied from the upstream side, but cannot be used when the water pressure is applied from the downstream side. However, the shell gate with a drum of the present invention is configured as described above, and can be used both when water pressure is applied from the upstream side and when it is applied from the downstream side.

[Brief description of drawings]

FIG. 1A is a perspective view showing an embodiment of a shell gate with a drum of the present invention, and FIG. 1B is a perspective view showing a rotary drive device of an overflow drum portion of the shell gate with a drum.

FIG. 2 is a side view of the shell gate with the drum.

FIG. 3 (a) is an operation explanatory view of the shell gate with the drum at high water, and FIG. 3 (b) is an operation explanatory view of the shell gate with drum at low water.

4A is an explanatory diagram showing a free-fall curve, FIG. 4B is an explanatory diagram showing a back surface of a shell portion, and FIG. 4C is an arrow C of FIG. 4B.
It is explanatory drawing which expands and shows a part.

FIG. 5 is a side view showing a conventional shell gate with flap.

FIG. 6 is a perspective view showing a conventional undulating shell gate.

[Explanation of symbols]

 1 Shell Part 2 Overflow Drum Part 3 Shell Support Part 3'Rotation Drive Unit 4 Wire Rope 5 Pier 6 Dustproof Rubber 7 Bearing Plate 8 Watertight Rubber 9 Torque Arm 10 Torque Shaft 11 Hydraulic Cylinder

Claims (3)

[Claims] 1. A shell part and an overflow drum part rotatably provided on an upper part of the shell part, and overflow water is separated from the back face of the overflow drum part and the shell part on the side opposite to the water storage side. The shell gate with a drum is characterized in that it is formed so as not to fall freely to the water surface on the downstream side. 2. The shell part is movably supported by piers on both sides via shell support parts provided at both ends of the shell part, and a rotary drive device for the overflow drum part is provided in the shell support part. The shell gate with a drum according to claim 1, wherein a wire rope for raising and lowering is attached to the shell supporting portion. 3. A pressure plate is provided between the shell portion and the overflow drum portion, a watertight rubber is provided on a water storage side between the shell portion and the overflow drum portion, and a dustproof rubber is provided on an anti-water storage side. 3. The shell gate with a drum according to claim 1, wherein the shell gate is provided.