JPH083190B2 - Accumulated sediment collection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering sediment deposited on the bottom of dam reservoirs and lakes.

[0002]

[Prior Art] Sediment deposited in a dam reservoir
It also causes a reduction in water storage capacity and shortens the life of dams equipped with hydroelectric power plants. As measures against this, the function of the reservoir is restored by using a sweep flow during floods or by introducing a sediment collection device during normal water levels.

As shown in FIG. 5, in the conventional sediment collecting apparatus of this type, a crane 4 and its power unit 5 are mounted on a pontoon 3 floated on the water surface 2 of a reservoir 1, and the crane 4 puts it in the air. The suspended bucket 5 was dropped to the water bottom 6 by its own weight so that the accumulated sand 7 was scooped up.

In the near future, as shown in FIG.
A self-propelled sand collector (robot) 11 is arranged on the bottom of the water at the location, and the bucket wheel 12 is appropriately driven by a command from the control ship 13 to connect the sand removal pipe 15 to the carrier 14.
There is also proposed a system in which the submerged pump (not shown) discharges the scraped soil through the through.

[0005]

However, each of the above-mentioned devices has a large-scale structure, so that there is a problem that it takes a long time to carry, install and withdraw.

In particular, in the recovery device of FIG. 5, since the bucket 5 scoops the earth and sand 7 by the operation in the vertical direction, it is difficult to collect sand in a narrow place where the pier 3 cannot well enter. There was a problem.

Further, in the system shown in FIG. 6, if the water bottom topography or the shape of the sediment is uneven, it may be difficult for the sand collector 11 to smoothly run by itself, and the recovery efficiency may be greatly reduced.

Therefore, in view of the above circumstances, the present invention provides a deposited earth and sand collecting device which has a simple structure and can easily collect the deposited earth and sand even in a narrow place or a place where the water bottom is uneven. It was invented.

[0009]

DISCLOSURE OF THE INVENTION The present invention is directed to a sand storage pipe such as a dam reservoir which extends from the water surface to the water bottom and is connected to a flexible sand removal pipe by a universal joint arranged at a predetermined interval. A screw blade provided in the pipe, and a rotary drive unit formed to be movable on the water surface and connected to the screw blade,
The discharging unit is provided at the water upper end of the sand discharging pipe to appropriately load the discharged sediment to the recovery ship or the like.

Further, it is desirable that the sand discharging pipes have two screw blades which are rotationally driven in opposite directions and are arranged in parallel, and at least one set of them is installed.

[0011]

With the above-mentioned structure, the screw blade and the sand discharging pipe have their tips arranged at the bottom of the water, and the screw blade is rotated by the rotation driving section to take the accumulated sand into the sand discharging pipe and Discharge to the side edge. The sediment that has been discharged to the surface of the water is discharged to a recovery ship at the discharge part.

Further, due to the construction in which at least one set of sand discharging pipes is installed, the reaction force of rotation of the screw blades is canceled and the directionality of the sand discharging pipe is stabilized.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the sediment recovery apparatus according to the present invention, which is used in a dam reservoir 1. This device includes a sand discharging pipe 22 having an opening tip 21 extending to the bottom of the water, a screw blade 23 provided in the sand discharging pipe 22, a rotary drive unit 24 connected to the screw blade 23, and discharging. A discharge fixing pipe 26 as a discharge portion for loading the collected sediment 7 on the recovery ship 25.
It is mainly composed of and.

The sand discharge pipe 22 is formed of a material having appropriate flexibility, and is formed in such a length that it can reach from the water surface 2 of the dam reservoir 1 to the water bottom. A float 27 is attached to the base end side of the sand discharge pipe 22 and is appropriately held at the water position.

The screw blade 23 is composed of unit screw blades 28 having a short length and connected by a universal joint (flexible joint) 29 so as to be bendable and capable of transmitting power. Is growing. As shown in FIG. 2, the unit screw blade 28 includes a screw blade 30 spirally continuous with a shaft 31 forming an axis thereof.
And the universal joints 29 are arranged at both ends of the shaft 31. As shown in FIG. 3, the sand discharging pipe 22 is formed such that the inner diameter D thereof is slightly larger than the outer diameter d of the screw blade 30 (D> d), and the rotational force is transmitted to the shaft 31. At this time, the earth and sand 7 are conveyed in the axial direction in cooperation with the screw blades 30.

As shown in FIG. 1, the discharge fixing tube 26 is
A flange 33 is attached to the water upper end (base end) 32 of the sand discharge pipe 27.
And are held substantially horizontally. The extension portion 34 of the screw blade 23 is accommodated in the inside thereof. Further, a vertically long discharge port (notch) 35 that opens downward is formed in the middle of the discharge fixing tube 26 in the longitudinal direction. That is, by exposing the discharge port 26 to the cargo receiving portion of the recovery ship 25, it is possible to discharge the accumulated sediment 7 discharged through the sand discharge pipe 22.

The rotary drive unit 24 is mounted on a pontoon 36 that can freely navigate on the water, and the output shaft 38 is connected to the shaft 37 of the screw blade extension 34 and the hydraulic motor 3 is connected.
9 and a hydraulic unit 41 connected to the hydraulic motor 39 by a hydraulic hose 40. Therefore, when the hydraulic pressure is supplied to the hydraulic motor 39, the screw blades 23
Is driven to rotate and the soil 7 is scooped up.

In this embodiment, the same components as those shown in FIG. 1 are arranged side by side in the lateral direction. The screw blades 23 are formed so as to rotate in mutually opposite directions and perform a predetermined sediment discharge.

Next, the operation of this embodiment will be described.

When collecting the sediment in the dam reservoir 1, first, a pontoon 36 is installed at a predetermined position, and the sand discharge pipe 22 containing the screw blades 23 inside is extended into the water.
The tip 21 is located at the bottom of the water. The screw blades 23 may be connected in advance by a universal joint 29 over the entire length, or the sand discharging pipe 22 may be immersed and then the unit screw blades 28 may be sequentially connected and inserted into the unit. Next, the discharge fixing pipe 26 is connected to the sand discharging pipe 22, and the screw blade 23 (extension 34) is connected to the hydraulic motor 39. Further, the recovery ship 25 is arranged below the discharge port 35 of the discharge fixing pipe 26.

Then, the hydraulic motor 39 is operated to rotationally drive the screw blades 23 to scrape the sediment 7 at the tip 21 and discharge it to the surface of the water via the sand discharging pipe 22. The discharged soil 7 falls from the discharge port 35 of the discharge fixing pipe 26 and is loaded on the recovery ship 25. When the recovery ship 25 is fully loaded, another recovery ship is replaced and the recovery is continued. Then, the pontoons 36 are sequentially moved to collect the sediment in the desired area of the reservoir.

As described above, since the sand blades 22 having flexibility and the screw blades 23 connected by the universal joint 29 are used to discharge the sedimented sand 7 at the bottom of the water, the structure is simple. Since the sediment 7 can be collected, it can be easily transported, installed, and withdrawn, and the setup time can be greatly reduced. In other words, the work efficiency of collecting sediment and improving the construction cost can be achieved.

Further, even in a narrow place where the barge 36 cannot enter, it is possible to easily remove the sand by simply pointing the tip 21 of the sand discharging pipe 22. Even if the water bottom topography or the shape of the sediment is uneven, the tip 21 of the sand removal pipe 22
However, the soil can be scraped off without interruption and the collection efficiency does not decrease. At this time, when it is desired to change the tip 21 (sand removal position) appropriately, the position can be easily adjusted by, for example, tying a rope at an appropriate position of the sand discharging pipe 22 and pulling the rope.

Since the sand discharging pipes 22 are arranged side by side and the screw blades 23 are rotated in opposite directions, the torque required to scoop up the sand at the bottom of the water is offset, and the directionality at the bottom of the water is offset. It is possible to prevent the movement without movement. Note that this side-by-side arrangement may be vertical, and several pairs of side-by-side sand discharge pipes 22 and the like may be provided. Further, in the present embodiment, the rotation drive units 24 are separately provided and arranged side by side, but the rotation drive units 24 are common and the two screw blades 23 transmit the rotational forces in opposite directions to each other by the gear mechanism. A configuration is also possible.

Further, in this embodiment, since the fixed discharge pipe 26 having the vertically long discharge port 35 is connected to the sand discharge pipe 22, the recovery ship 25 is stopped along the fixed discharge pipe 26. It is possible to properly load discharged sand without frequent movements.

The shape of the screw blades 23 is not limited to that shown in FIG. 2. For example, as shown in FIG. 4, unit screw blades 52 having discontinuous screw blades 51 are formed,
The shaft 53 may be connected by a universal joint 54.

In addition, holes of an appropriate size may be formed in the screw blades 30 and 51 to drop water or fine particles in the earth and sand 7.

The power source of the rotary drive unit is not limited to hydraulic pressure, but may be electricity or an engine. Further, as the material of the sand discharging pipe, rubber, plastic, and flexible metal can be used.

Furthermore, the present invention relates to a dam reservoir, an ocean,
It can also be applied to sludge removal in lakes and marshes.

[0031]

In summary, according to the present invention, the following excellent effects are exhibited.

(1) According to the structure of claim 1, the simple structure enables rapid transportation and the like, and the sediment can be easily deposited even in a narrow place or a place where the water bottom is uneven. Can be collected.

(2) According to the second aspect, it is possible to prevent the sand discharging pipe from becoming unstable due to the rotating torque of the screw blades.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a sediment recovery device of the present invention.

FIG. 2 is a perspective view showing a screw blade of FIG.

3 is a partially cutaway perspective view showing the sand discharging pipe of FIG. 1. FIG.

FIG. 4 is a side view showing another embodiment of FIG.

FIG. 5 is a side view showing a conventional sediment recovery device.

FIG. 6 is a side view showing another conventional sediment recovery device.

[Explanation of symbols]

 1 Dam Reservoir 2 Water Surface 7 Sediment Sediment 22 Sand Discharge Pipe 23 Screw Blade 24 Rotation Drive Unit 25 Recovery Ship 26 Discharge Fixed Pipe (Discharge Unit) 29 Universal Joint (Universal Joint)

Claims (2)

[Claims] 1. A screw blade provided in the sand removal pipe, which is connected to a flexible sand removal pipe extending from the water surface of a dam reservoir or the like to the water bottom by a universal joint arranged at a predetermined interval. And a rotary drive unit movably formed on the water surface and connected to the screw blades, and a discharge provided for the water upper end of the sand discharge pipe for appropriately loading the discharged sediments on a recovery ship or the like. And a portion for collecting sediment from the sediment. 2. The deposited earth and sand collecting device according to claim 1, wherein the sand discharge pipes are arranged in parallel with each other and have two screw blades that are rotationally driven in opposite directions, and at least one set of these blades is installed.