JPH0327081Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bucket wheel type excavation device that is attached to the tip of the rudder of a dredger and used for dredging.

[Conventional technology]

A dredger used for dredging work to dredge up mud, sandstone, etc. from the bottom of the water, as shown in Figure 3, has a spud 10 on the stern that can be raised and lowered, stuck into the bottom of the water, and fixed the hull 9. The bottom of the water is excavated with the excavation device 1 at the tip of the rudder 11 which is attached so that it can be raised and lowered freely, and in the case of a pump dredger,
The excavated earth and sand is sucked through a suction pipe 6 by a pump on the hull 9, and is discharged through a discharge pipe.

Various types of excavation equipment 1 have been used to be attached to the tip of the ladder 11, and in recent years, bucket wheel type equipment has been adopted.

As shown in FIGS. 4 and 5, the conventional bucket wheel excavator 1 has a rudder 11 with a
A wheel 2a attached to a rotating shaft 3 and a plurality of excavation buckets 2 provided on the outer periphery of the wheel 2a.
A bucket wheel 2 is rotatably provided, and the wheel 2a is composed of a disk portion 2c fixed to the rotating shaft 3 and a ring-shaped rim portion 2d provided on the outer periphery of the disk portion 2c. By rotating the rotary shaft 3 using a device, the disk portion 2c, rim portion 2d, and bucket 2b of the wheel 2a can rotate as one. Further, the tip of the suction pipe 6 supported on the ladder 11 side is connected to the suction port 5 of the earth and sand intake chamber 4 of the bucket wheel 2, and the cover plate 2e in which the suction port 5 is formed is a rotating disk portion. 2c, and the earth and sand excavated by the bucket 2b is taken into the earth and sand intake chamber 4 and sucked into the suction pipe 6. 7 is an intake port for earth and sand, and 8 is a partition plate.

[Problem that the invention attempts to solve]

However, when excavating the water bottom with a bucket wheel type excavation device, the soil sucked up by the bucket 2b is lifted above the suction port 5, and then falls into the suction port 5 by the action of gravity, and is absorbed together with the surrounding water. It is sucked up by a pump, and when several buckets 2b rotate in sequence to excavate the earth and sand at the bottom of the water and suck it upward, some of the earth and sand thrown out to the outer periphery by the rotation of the buckets 2b absorbs the surrounding water. There was a problem that the water was contaminated, and furthermore, the mud content was low.

Therefore, the present invention solves the problems of the conventional method by preventing the soil from being scattered around even if some of the soil is thrown out when the bucket excavates and sucks up the soil while rotating, and also prevents foreign matter from being sucked in. The aim is to prevent this from happening.

[Means for solving problems]

The present invention provides a bucket wheel type excavation equipment in which a cover that covers the upper half of the bucket wheel is fitted onto the rotating shaft of the bucket wheel, and a plurality of downwardly extending holes are provided on both sides of the front end of the cover. It has a configuration with a cutter attached.

[Effect]

When the bucket of the bucket wheel rotates and sucks up the excavated soil, some of the soil that is thrown outward due to centrifugal force due to the rotation of the bucket is stored in a dam inside the cover that covers the upper half of the bucket wheel. It is dropped into the suction port position in a stopped state. Further, when the ladder is swung from side to side, unnecessary objects such as dust in the direction of swing are pushed away by the cutters attached to both sides of the front end of the cover, so that such unnecessary objects are no longer sucked up by the bucket.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which a bucket wheel 2 is rotatably attached to the tip of a rudder 11 that is attached to the bow of a dredger so that it can rise and fall freely, and the bucket wheel 2 is grounded on the bottom of the water. In the configuration in which excavation is performed by swinging the bucket wheel 2 left and right while rotating, a cover 12 is provided to cover the upper half of the bucket wheel 2 when the bucket wheel 2 is in an excavating position. The cover 12 has a hollow semicircular shape as shown in FIG. 2, and each left and right plate has a rotating shaft 3 of the bucket wheel 2 (see FIG. 4) in the center. It has a hole 13 for insertion, and a plurality of cutters 4 of a required length are attached downwardly at required intervals to the front end of each of the left and right frames so as to push away foreign matter during excavation.

The cover 12 configured as described above is fixed to the rudder 11 so as to cover the upper half of the bucket wheel.

Now, when the hull is fixed with the stern spats and the bucket wheels 2 are rotated and the bucket wheels 2 are swung from side to side along with the rudder 11, each bucket 2b of the rotating bucket wheels 2 will move the earth and sand at the bottom of the water. It is scooped up and lifted one by one, dropped into the suction port position, and sucked up through the suction pipe 6 by the pump on the hull. At this time, due to centrifugal force caused by the rotation of the bucket wheel 2, some of the dirt scooped up by the bucket is thrown outward, but this thrown dirt is caught by the cover 12 and can be scattered around. It disappears. This prevents the surroundings from being polluted. or,
Since some of the earth and sand caught by the cover 12 is sucked up by the pump, the mud content can be improved compared to the case without the cover 12.

The above is an embodiment of the present invention, and a case where the cover 12 is fixed is shown, but it is possible to make the cover 12 rotatable in the front and back direction, and to install a cylinder device or the like between the top of the cover 12 and the ladder 11. Intermediate,
The cover 12 can always cover the upper half of the bucket wheel 2 even when the dredging water depth H is shallow. According to this embodiment, the relative angle with the rudder 11 can be freely changed whether the depth of the dredging water is shallow or deep, and the cover can always be kept in the proper posture as shown in FIG. 1 during excavation.

The reason why the cover 12 is semicircular is to prevent the cover from hitting the bottom surface and getting in the way when the bucket wheel 2 is lowered to the bottom surface and digging begins. However, once excavation has started, it is better to cover the rear of the bucket wheel 2 so that earth and sand do not escape to the rear. Therefore, in the present invention, a sliding cover 15 as shown by the two-dot chain line in FIG.
The sliding cover 15 may be attached so as to be rotatable around the ladder 11, and the sliding cover 15 may be supported via a cylinder device 16 with respect to the ladder 11.
According to this embodiment, the sliding cover 15 is stored in the cover 12 before the start of excavation, and after the start of excavation, it is pulled out from inside the cover 12 downward by the cylinder device, so that it does not get in the way. The rear side of the bucket wheel 2 can be covered without any problems.

Note that the present invention is not limited to the above-described embodiments; for example, the shape of the cover 12 may be
Figure 2 shows the case where the lower ends of the left and right plates and the front and rear plates are straight, but the lower edges of both plates are shaped so that they spread outward, so that they can be placed on them without digging into the sediment at the bottom of the water. Good too.

[Effect of idea]

As described above, according to the bucket wheel excavator for dredging of the present invention, it is possible to prevent part of the earth and sand from scattering and polluting the surrounding area during excavation with the bucket wheel, and it is covered with a cover to prevent mud from being contaminated. In addition, the foreign matter is pushed away by the cutter and is not sucked in, eliminating the risk of clogging the pump, and other excellent effects can be achieved.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a perspective view showing an example of a cover used in the present invention.
FIG. 3 is a schematic side view showing the entire bucket and wheel type pump dredger, FIG. 4 is a cutaway front view of a conventional bucket and wheel type excavator, and FIG. 5 is a cutaway side view of FIG. 4. 1 is an excavation device, 2 is a bucket wheel, 2b is a bucket, 3 is a rotating shaft, 11 is a rudder, 12 is a cover, 14 is a cutter, and 15 is a sliding cover.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A bucket wheel type for dredging, in which a bucket wheel is rotatably attached to the tip of the rudder, and earth and sand at the bottom of the water is excavated by rotating and swinging the bucket wheel from side to side. In the excavation equipment, a cover structured to cover the upper half of the bucket wheel is attached to cover the upper half of the bucket wheel, and a plurality of cutters extending downward are provided on both sides of the front end of the cover. A bucket and wheel type excavator for dredging, which is characterized by the fact that it is attached to the bucket. 2. The bucket wheel type excavator for dredging according to claim 1, wherein the cover structured to cover the upper half of the bucket wheel is provided with a sliding auxiliary cover.