JPH055009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a dredging machine that can extract gravel, sand, and other mineral resources from the ocean floor or the bottom of the water and feed it onto land or along a dredging line.

(b) Prior Art Conventionally, such dredging equipment has a structure in which a long rigid ladder is extended into the water from a dredger, and an excavator and a suction pump are attached to the tip of the ladder. When dredging, the excavator and the suction pump are driven simultaneously to excavate the earth and sand on the water bottom or the seabed, and then the suction pump can move the excavator onto the dredging vessel.

(c) Problems to be solved by the invention However, such dredging machines had the following problems.

The dredging depth is proportional to the length of the rigid ladder;
When the rigid rudder is lengthened, the rigid rudder weight also increases significantly, which may cause the dredger to capsize.

In order to prevent such capsizing, it is necessary to increase the size of the rudder drive device and the dredger itself, but this results in a significant increase in equipment costs.

Therefore, in actual dredging work, there is a certain limit to the length of the rigid ladder, and dredging work can only be performed to a certain depth.

An object of the present invention is to provide a dredging machine that can solve the above problems.

(d) Means for Solving the Problems The present invention provides a hanging type excavator, and a suction device which is integrated with the excavator and has a suction opening for sucking excavated material excavated by the excavator. pump and
In this dredging work machine, which is composed of an excavator fixing spud that fixes the excavator to the ground, the suction pump can be fixed to the ground with the excavator fixing spud, and multiple excavators are connected around the suction pump. The present invention relates to a dredging work machine characterized in that the following are arranged symmetrically about the axis of the suction pump.

(E) Effect a The excavator fixing spud allows multiple excavators to be fixed to the ground together with the suction pump, making it easier for dredging machines to excavate compared to when a single excavator is used. Capacity can be increased significantly.

b Since multiple excavators are arranged symmetrically around the suction pump, multiple excavators can be fixedly installed on the ground in a well-balanced manner with the suction pump at the center, so the dredging machine can perform stable dredging. Able to perform work.

Moreover, since it is possible to prevent the flow of excavated soil into the suction pump from being obstructed by the excavator fixing spuds, it is possible to increase dredging efficiency by installing multiple excavators. can.

(f) Examples The present invention will be described in detail below based on examples shown in the attached drawings.

In FIG. 1, a dredger 1 has a working machine suspension device 4 including a tilting boom 2 and a winch device 3 installed at its front portion. Further, a dredging work machine 6 according to the present invention is suspended from the tip of a hanging wire 5 suspended in the water from the work machine suspension device 4, and the dredging work machine 6 is attached to the ground 7 on the seabed. It is installed in

In FIG. 1, reference numeral 8 indicates a flexible excavated materials feed pipe for feeding earth and sand collected by the dredging machine 6 onto the dredging vessel 1, and 9 indicates a flexible excavated material supply pipe for feeding the earth and sand collected by the dredging machine 6 onto the dredging vessel 1. This is a drive source connection wire that connects with the power source, hydraulic power source, etc.

Figs. 2 and 3 show a dredging machine 6 according to the present invention.
The overall configuration is shown in detail.

In both figures, reference numeral 10 denotes a vertically long box-shaped main machine frame formed from side frame members 11 and upper and lower frame members 12 and 13, and the main machine frame 10 has a suction pump 14 installed in its internal space. There is.

In this embodiment, the suction pump 14 includes a motor 15, an impeller casing 16 connected to the motor 15, and containing an impeller (not shown).
It is formed from a suction pipe 17 having a suction opening 17a formed at its lower end, and a discharge opening 16a provided in the impeller casing 16 is connected to the excavated material feeding pipe 8.

Furthermore, a pair of excavators 18, 18 having the same shape are fixed to the frame members 11, 11 on both sides of the main machine frame 10, symmetrically with respect to the center line of the main machine frame 10.

In this embodiment, the excavator 18 includes a frame 19 fixed to the side frame member 11, a motor 21 connected to the upper end of the frame 19 via a coupling frame 20, and a rotatable motor 21 connected to the lower end of the frame 19. It consists of a rotary excavation blade 22 attached to the excavation blade 22.

Reference numerals 25 and 25 denote a pair of excavator fixing spuds disposed on the front and rear sides of the main machine frame 10, and each spud 25 has its upper end connected to a horizontal member 26 installed at the lower part of the main machine frame 10. rivets, bolts,
They are connected and fixed by means such as welding.

In addition, in order to facilitate driving the lower end of the spud 25 into the ground 7, as it goes toward the tip,
It has a narrow wedge shape and protrudes downward from the tip of the excavating blade 22 of the excavator 18. This is to prevent the excavator 18 from digging deeply into the ground 7 by driving only the spud 25 into the ground 7.

Next, dredging work performed by the dredging work machine 6 having the above configuration will be explained.

A dredging machine 6 is grounded from a dredging ship 1 to a ground 7 such as the seabed using a dredging machine hanging device 4. In such a ground contact, since the dredging work machine 6 is a heavy object with considerable weight, the spuds 25, 25 attached to the suction pump 14 are driven into the ground 7 due to its weight, and the dredging work machine 6 is immobilized. can be achieved.

Thereafter, the excavators 18, 18 and the suction pump 14 are driven to excavate earth and sand, and the excavated material is fed onto the dredger 1 via the suction pump 14 and the excavated material feed pipe 8.

Such dredging work generates a force that rotates the excavators 18, 18 by driving the excavators 18, 18, but as described above, the excavators 18, 18
Since the excavators 18, 18 are firmly fixed to the ground 7 by the spuds 25, 25, rotation of the excavators 18, 18 is reliably prevented, and smooth excavation and feeding operations can be performed.

In this way, the dredging machine 6 can be fixed to the ground 7 only by the spuds, making it unnecessary to use a conventional rigid ladder, and the dredging work can be easily carried out by suspending the dredging machine no matter how deep the water is. The machine can be fixed to the bottom of the water, allowing for smooth dredging work.

Furthermore, in this embodiment, a plurality of excavators 18, 18
Since the excavation work is carried out using a single suction pump 14, the dredging capacity can be doubled while using a single suction pump 14.

Furthermore, since the plurality of excavators 18, 18 are arranged symmetrically around the suction pump 14, the suction pump 1
Since the excavators 18, 18 can be fixedly installed in a well-balanced manner on the ground 7 centering on the dredging machine 4, the dredging machine can perform stable dredging work.

Note that the present invention is not limited to the dredging machine 6 of the embodiment described above, and for example, the dredging machine 6 shown in FIGS.
A modification example shown in FIG. 20 can be considered.

4 to 7 show examples of the arrangement of the spuds 25 of the dredging machine 6 shown in FIGS. 2 and 3, respectively.
Shown are 1, 2, 3, and 4 installed.

8 to 10, a stirring blade 30 is attached to one suction pump 14, and the same suction pump 1
4 is shown in which a pair of excavators 18, 18 are directly attached to both sides of the excavator 4. In this example, spud 2
As shown in FIG. 10, two suction pumps 5 are installed on both sides of the suction pump 14, but one to four can be installed as shown in FIGS. 2 to 7. In addition,
The number of spuds 25 attached is the same in the following embodiments.

Figures 11 and 12 show one suction pump 1.
An embodiment is shown in which four excavators 18 are attached around the ground 7 and the suction pump 14 is fixed to the ground 7 by four spuds 25. In this case, the spud 25 can also position the excavation position.

Figures 13 and 14 are similar to Figures 11 and 12.
This is a modified example of the embodiment shown in the figure, in which one suction pump 1 is used.
An embodiment is shown in which three excavators 18 are attached around the ground 4 and the suction pump 14 is fixed to the ground 7 by three spuds 25. In this case as well, spud 25
can determine the location of the excavation.

15 to 20 relate to examples of modifications of the spud 25, and FIGS. 15 and 16 show spuds 25 having a T-shaped cross section to increase the section modulus and strength. Spatsud 25 is
After aligning the through hole 40 provided at the upper end with an arbitrary through hole 41 provided in the suction pump 14, for example, the two can be connected in a height-adjustable manner by stitching with a connecting bolt.

17 to 20 utilize not only driving into the ground 7 by the weight of the dredging machine 6, but also mechanical driving force.

That is, in FIG. 17, a high-pressure water pipe 42 is arranged along the spud 25, and high-pressure water (jet water) is ejected from a nozzle 43 provided at the tip of the pipe 42, and the ground 7 is damaged by the ejected energy. The purpose is to excavate and drive the spud 25 into the ground 7.

In FIG. 18, a vibration generator (vibrator) 44 is attached to the middle of the spud 25, and the vibration energy generated by the vibration generator 44 is used to drive the spud 25 into the ground 7.

In Fig. 19, the upper end of the spud 25 is connected to a telescopic rod 46 of a hydraulic cylinder (or an electric cylinder) 45, and the spud 25 is driven into the ground 7 by driving the hydraulic cylinder 45. In FIG. 20, the above-described high-pressure water pipe 42 is further attached to the spud 25, and the synergistic effect further ensures that the spud 25 is driven into the ground 7.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the installation state of the dredging machine according to the present invention, Figure 2 is a front view of the dredging machine, Figure 3 is a side view of the same, and Figures 4 to 14 are the dredging machine. FIGS. 15 to 20 are explanatory views of other embodiments (FIG. 16 is a sectional view taken along the line of FIG. 15). In the diagram, 1... dredger, 2... tilting boom, 3...
...Winch device, 4... Work machine suspension device, 5...
Suspension wire, 6... Dredging machine, 7... Ground, 8
... Excavation supply pipe, 9 ... Drive source connection wire, 1
0... Main machine frame, 11... Side frame material, 12... Upper frame material, 13... Lower frame material, 14... Suction pump, 1
5...Motor, 16...Impeller casing, 1
6a...Discharge opening, 17...Suction pipe, 17a...
Suction opening, 18... Excavator, 19... Frame,
20... Coupling frame, 21... Motor, 22... Excavation blade, 25... Excavator fixing spud.

Claims (1)

[Claims] 1. A hanging type 12 excavator 18, and a suction pump 14 that is integrated with the excavator 18 and includes a suction opening 17a for sucking the excavated material excavated by the excavator 18. and an excavator fixing spud 25 for fixing the excavator 18 to the ground 7, in which the suction pump 14 can be fixed to the ground 7 by the excavator fixing spud 25, and the suction pump 14. A dredging work machine characterized in that a plurality of excavators 18 are arranged symmetrically around the axis of the suction pump 14.