JP2665845B2 - Dredge suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for dredging earth and sand on the bottom of a reservoir such as a dam reservoir, a lake, a river, a port or the like by a suction method. The present invention relates to a dredging suction device suitable for dredging a large water bottom.

[0002]

2. Description of the Related Art Conventionally, as a suction device for dredging, a suction device which is equipped with a forced digging means such as a rotary cutter or a water jet nozzle at the tip of a suction pipe to improve digging efficiency is often used. ing. However, with such a forced excavation means, when the sediment deposited on the bottom of the water is fine-grained sand or soft mud soil, the excavation means spreads the sediment, and conversely, the dredging efficiency decreases. Therefore, in the case where such earth and sand is targeted, a so-called bucket wheel type suction device in which earth and sand are scooped and collected at the suction port becomes useful.

In this bucket wheel type suction device, a bucket wheel having a plurality of buckets is rotatably attached to the tip of a ladder extending from a dredger, and a suction mouth (a suction mouth) of a suction pipe is provided inside the bucket wheel. And the bucket wheel is rotated by a motor so that the earth and sand removed by the bucket is dropped into the suction mouth (for example, the actual open flat 1-).
No. 65349).

[0004]

However, according to the above-described bucket wheel type suction device, for example, a water bottom where obstacles such as deciduous trees and large stones are often scattered, such as a dam storage lake, or an uneven land. When trying to dredge a large water bottom, since the bucket wheel is forcibly rotated by the motor, the impact transmitted to the bucket wheel becomes extremely large when colliding with the above-mentioned obstacle or non-land, and the opportunity to damage the bucket wheel or bucket is increased. In addition, there is a problem that the repair or replacement takes a lot of man-hour and time. In addition, when the bucket wheel is buried in the earth and sand due to collapse or depression of the earth and sand, the rotation of the bucket wheel is stopped and dredging is not possible. And there is also a problem in terms of operability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a dredging device which is easy to avoid obstacles and uneven land and has excellent operability. It is to provide a suction device.

[0006]

According to the present invention, in order to achieve the above object, a hollow support member is connected to the tip of a suction pipe via a swivel joint, and the support member can roll about a horizontal axis. And a cover fixed to the support member and covering a portion other than the ground side of the porous ball is disposed inside or outside the porous ball, and the support member is provided inside the porous ball. And a suction conduit communicating the suction port with the suction port facing the ground side of the perforated ball.

[0007]

In the suction device for dredging constructed as described above, the dirt is sucked into the suction port of the internal suction conduit through the hole by rolling the perforated ball on the water bottom. Thus, the inflow of water into the perforated ball is restricted by the cover disposed inside or outside the perforated ball, and a desired mud content can be secured. In addition, since the perforated ball rolls freely without using power, it can easily get over obstacles and irregularities at the bottom of the water. In addition, the suction function is not hindered even if the soil collapses or collapses.In addition, since the support member for supporting the perforated ball is swiveled by the swivel joint, the perforated ball can roll in any direction. It becomes possible.

[0008]

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

FIG. 3 shows a dredging system including a suction device according to the present invention. In FIG. 1, reference numeral 1 denotes a dredge, and a ladder 3 is extended from the dredge 1 toward a water bottom 2. The rudder 3 is rotatably supported at its base end by the dredger 1, and can swing up and down around the support point A. Reference numeral 4 denotes a suction pipe supported by the ladder 3, and a base end of the suction pipe 4 is connected to a mud drain pipe 5 on the dredger 1 via a dredge pump (not shown). The suction device 10 according to the present invention is provided at the end of the suction pipe 4.
Are connected. The suction device 10 receives the weight of the ladder 3 and contacts the water bottom 2, and moves on the water bottom 2 according to the movement of the dredger 1.

Here, the suction device 10 is configured as shown in FIG. 1 and FIG. In both figures, reference numeral 11 denotes an elastic pipe interposed in the suction pipe 4, and the distal end of the suction pipe 4 can be slightly elastically deformed around the axis by the presence of the elastic pipe 11. A hollow support member 13 is connected to a distal end of the suction pipe 4 via a swivel joint 12. This support member
13 has bifurcated arms 14 and 15, one of which is in communication with the suction pipe 4 and the other arm 15 is in non-communication with the suction pipe 4. Have been.

Each of the bifurcated arms 14 and 15 of the support member 13 has its distal end bent inward on the same horizontal axis B, and a large number of holes 16a in the wall surface between the distal ends. And a spherical cover 17 having a large-diameter hole 17a in a part of the peripheral surface. More specifically, hollow connecting members 19 and 20 are connected to the distal ends of the bifurcated arms 14 and 15 using a joint 18, and the porous ball 16 is rolled against the connecting members 19 and 20. Movable, cover
17 are each mounted non-rolling. Further, the perforated ball 16 and the cover 17 are disposed so as to form a small gap, and the cover 17 has a large-diameter hole 17a formed in the perforated ball.
It is positioned so as to face the ground side with respect to the 16 water bottoms 2.

On the other hand, a suction conduit 21 is provided inside the cover 17. One end of the suction conduit 21 is connected to the connecting member 19 on the one arm portion 14 side using a joint 22, and the opening end (suction port) 21 a of the suction conduit 21 is connected to the large-diameter hole 17 of the cover 17.
It faces the front of a. The suction port 21a of the suction pipe 21
Are expanded in a trumpet shape.

Here, the perforated ball 16, the cover 17 and the suction conduit 21 are formed in advance as a subassembly using the connecting members 19 and 20. In order to form this subassembly, for example, the perforated ball 16 and the cover 17 are provided as half-splits, and the half-splits are connected by connecting members 19 and 20, and the suction pipe 21 is connected to one of the connecting members 19. After the connection, a method of joining and integrating the respective halves can be adopted.

In the suction device 10 for dredging configured as described above, the ladder 3 is extended, the perforated ball 16 is brought into contact with the water bottom 2, and the dredger 5 is moved. Then, the perforated ball
16 rolls on the water bottom 2, and fine earth or sand such as soft mud is sucked into the suction port 21 a of the internal suction pipe 21 through the hole 16 a, and the soil sucked into the suction pipe 21 is connected to the connecting member 19.
It is lifted onto the dredger 1 via one arm 14 of the support member 13 and the suction pipe 4, and further discharged to a predetermined dumping place via the mud pipe 5.

When the earth and sand is sucked into the suction conduit 21, the inner surface of the porous ball 16 on the side opposite to the side contacting the water bottom 2 is covered with the cover 17, so that water on the water bottom 2 is removed. The flow into the inside of the perforated ball 16 through the hole 16a is greatly restricted, so that the mud content does not decrease and the dredging efficiency is improved. Also, perforated balls
Since the roller 16 freely rolls without using power, even if there are obstacles such as deciduous trees and large stones on the water bottom 2 or large irregularities, these can easily be overcome. They will not be damaged by things or unevenness. In this embodiment, in particular, the elastic pipe 11 is interposed in the suction pipe 4 so that the suction pipe 4 is made flexible, so that the impact applied to the perforated ball 16 is greatly reduced, Damage to the suction section including 16 is more reliably prevented. In addition, even if the collapse or depression of the soil occurs, the suction function through the porous ball 16 is not hindered, and the support member 13 supporting the porous ball 16 is swiveled by the swivel joint 12, so that the porous ball 16 Can be rolled in any direction, and the device can be used roughly.

In the above embodiment, the multi-hole ball 16
Although the cover 17 for restricting the flow of water into the inside is arranged inside the perforated ball 16, the cover 17 may be arranged outside the perforated ball 16.

[0016]

As described above in detail, according to the suction device for dredging according to the present invention, the porous ball is rolled to suck the earth and sand into the suction conduit in the porous ball. It will not be damaged by underwater obstacles or irregularities, and its durability and reliability will be significantly improved. Further, since the inflow of water is restricted by the cover, a desired mud content can be secured, and an improvement in dredging efficiency can be achieved. Moreover, not only does the suction function not be disturbed even when the soil collapses or collapses, the swivel joint guarantees the rolling of the perforated ball in any direction, and the avoidance of the obstacles and unevenness can be achieved. Together, the operability is remarkably excellent.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the structure of a suction device for dredging according to the present invention.

FIG. 2 is a perspective view of the suction device for dredging.

FIG. 3 is a schematic diagram showing a dredging system including the suction device for dredging.

[Explanation of symbols]

 4 Suction pipe 12 Swivel joint 13 Support member 16 Perforated ball 16a Hole 17 Cover 17a Large diameter hole 21 Suction conduit 21a Suction port

Claims (1)

(57) [Claims] 1. A hollow support member is connected to a tip of a suction pipe via a swivel joint, and the support member supports a hollow porous ball so as to roll about a horizontal axis. A cover fixed to the support member and covering a portion other than the ground side of the perforated ball is disposed outside, and an inside of the perforated ball communicates with the support member and has a suction port facing the ground side of the perforated ball. A suction device for dredging, wherein a suction pipe is provided.