JP2004182146A - Dredge boat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dredge boat capable of preventing diffusion of sludge under water when dredging the sludge of water bottom with a dredging device and of preventing the diffusion of the sludge even when a hull of the dredge boat provided with the dredging device through a ladder rocks as the dredging device follows on a water bottom surface. <P>SOLUTION: The dredge boat 1 is provided with the ladder 2 arranged downward to oscillate fore and aft, a dredging bucket 5 is mounted on the tip of the ladder 2 to separately oscillate fore and aft, and the ladder itself is tiltable in a lateral direction. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a dredger capable of preventing the diffusion of sludge accompanying dredging when dredging sludge on the bottom of the sea, such as a sea or a lake, which is contaminated with dioxin or the like.
[0002]
[Prior art]
When the bottom mud contaminated with dioxin or the like is removed from the water bottom by dredging, it is strongly required to prevent the sludge from spreading in water.
[0003]
However, the structure of the dredging device that does not diffuse the sludge in the water has not been studied so far, and the dredging of the sludge at the bottom of the water is performed by attaching the dredging device to the tip of a ladder provided from the dredger to the bottom of the water. In this case, if the dredging device is tilted due to the motion of the hull of the dredger and cannot follow the water bottom surface, the bottom mud is stirred in the water to diffuse the sludge.
[0004]
[Problems to be solved by the invention]
The present invention can prevent the diffusion of sludge in water when dredging sludge on the bottom of the water with a dredging device, and the dredging device can also prevent the dredging device from swaying the hull of a dredger provided with the dredging device via a ladder. To provide a dredger that does not allow sludge to spread.
[0005]
[Means for Solving the Problems]
According to the present invention, the rudder is provided so as to be swingable in the front-rear direction downward from the dredger, and the dredge bucket provided at the tip of the rudder is also separately mounted so as to swing in the front-rear direction. The present invention is also directed to a dredger that is capable of tilting in the left-right direction. The present invention also provides two dredging buckets in the front-rear direction of the rudder of the above-mentioned dredger so that their openings face each other and swingably with each other. It consists of a dredger into which a suction pipe leading to a vacuum pump is introduced.In the present invention, the bottom mud collected by the bucket is pumped by the pressure pump, and the bottom mud adhered to the bucket and collected by the bucket are generated. It consists of a dredger equipped with a rotary dredging bucket that sucks turbid water with a suction pump and pumps it together with bottom mud by a pressure pump.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the dredger of the present invention will be described below with reference to the drawings.
[0007]
FIG. 1 is a side view of a hull of a dredger 1 according to an embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is a diagram of a rudder 2 provided below the dredger 1 so as to be swingable in the front-rear direction. FIG. 5 is an enlarged side view for explanation. FIG. 4 is a plan view showing a state in which a rotary dredging bucket 5 'is provided at the tip of the ladder 2, and FIG. 5 is a side view of FIG.
[0008]
At the attachment part of the rudder 2 to the dredging boat 1, two dredging surface inclined jacks 3 shown in FIG. 3 are arranged in the width direction. At the tip of the rudder 2, a hull detected by an inclinometer or the like on the hull side is provided. The dredge buckets 5 and 5 'are arranged via four hull sway absorbing cylinders 4 which operate so as to cancel the sway of the hull.
[0009]
Further, the attachment portion of the dredge buckets 5, 5 'and the ladder 2 are rotatably connected to each other via the pin 6, and a dredge device is provided between the dredge buckets 5, 5' and the ladder 2 in the width direction. Two horizontal adjustment jacks 7 are arranged.
[0010]
That is, the dredging buckets 5, 5 'provided at the tip of a ladder 2 which is provided below the dredger 1 so as to be swingable in the front-rear direction are also separately mounted so as to swing in the front-rear direction. Also, the dredging surface 1 can be tilted left and right by adjusting the jacks 3, 3 so that the dredging boat 1 can be tilted left and right.
[0011]
In addition, the dredger 1 of this embodiment is of a type corresponding to a water depth of 15 m, and adopts a method of linearly moving in the front-rear direction by a wire 9 in order to eliminate spat replacement that easily causes pollution in water. As described above, the angled dredging buckets 5, 5 ′ are adjusted by lowering the ladder 2 by the dredging device horizontal adjustment jacks 7, and the hull of the hull is absorbed by the hull sway absorbing cylinder 4, thereby reducing the hull. Dredging can be performed without being affected by the behavior of the ground and unevenness of the ground.
[0012]
Further, a dredging surface inclination adjusting jack 3 is provided at the upper end of the rudder 2 on the hull side so as to follow the inclination of the water bottom surface perpendicular to the dredging direction, as shown in FIG. The cylinders of the jacks 3, 3 follow the inclination of the dredging surface as shown in FIG. 8 according to the inclination of the dredging surface, and dredging along the inclination can be performed.
[0013]
Next, as the dredge buckets 5 and 5 'used in the embodiment of the present invention, two types of the openable bucket 5 shown in FIG. 1 and the rotary bucket 5' shown in FIG. I will explain.
[0014]
First, in the openable / closable dredging bucket 5 shown in FIG. 9, two buckets 5A and 5B are provided at the front end of the ladder 2 arranged as shown in FIG. The suction pipe 10 leading to the vacuum pump in the direction of the arrow A is introduced into each of the buckets 5A and 5B, and only the tips of the openings of the buckets 5A and 5B at the time of dredging the bottom mud. Buckets that can be opened and closed in contact with the bottom mud and that can be sealed when closed are arranged on both front and rear sides, and a suction pipe 10 that communicates with a vacuum pump is arranged at the base of each bucket 5A, 5B.
[0015]
10 is an enlarged plan view of the bucket 5 of FIG. 9, and FIG. 11 is a side view of FIG. 10. When one bucket 5A dredges the bottom mud 11, a portion where the bucket 5A comes into contact with the bottom mud 11 is minimum. The shape of the bucket is formed so that the outer surface is narrowed rearward from the opening thereof so that the bottom mud in the bucket 5A can easily move to the vicinity of the suction pipe 10 so that the bottom mud in the bucket 5A can be moved easily. The occurrence of underwater pollution is reduced, and after dredging proceeds in the direction of arrow F in the state of FIG. 11, the opening and closing of the front and rear buckets are reversed to perform dredging in the direction opposite to arrow F. FIG. 12 shows the retracted state of the openable dredge bucket 5.
[0016]
In this openable / closable dredging bucket 5, the portion where the buckets 5A and 5B contact the bottom mud 11 is minimized only on the peripheral surface of the opening of the bucket, and the bottom mud 11 dredged by the vacuum pump is sucked together with muddy water. Therefore, the diffusion of sludge in water can be prevented.
[0017]
13 is a side view of the rotary dredging bucket 5 ', FIG. 14 is an enlarged plan sectional view for explaining the bucket, FIG. 15 is a side view in the CC direction of FIG. 14, and FIG. 14 is a side view in the DD direction, and FIG. 17 is a side sectional view in the EE direction in FIG.
[0018]
In this rotary dredging bucket 5 ′, an open bottom bucket 5 a partitioned by a plurality of blades is arranged between two parallel side plates 14, and bottom mud collected by the rotation of the bucket 5 a. Enters the mud storage tank 21 having an opening 22 from the upper opening 22 and is discharged to the dredger 1 by the pressure pump 13 through the mud pipe 20 in the ladder 2 and collected.
[0019]
Further, the upper part of the bucket 5a is covered with the cover 12, and the turbid water suction ports 17 are arranged on both outer sides of the cover 12, and the turbid water on the lower outer side of the cover 12 is removed by the turbid water suction pump 16 provided outside the cover 12. The water is sucked and guided to the water collecting pipe 30 outside the cover 12, the water injection nozzle 18 is arranged from the water collecting pipe 30 to the inside of the cover 12, and the muddy water suction port 17 sucks the sludge and the muddy water in the gap in the part. The water is ejected into the dredge bucket 5 'by the water injection nozzle 18 to prevent dredged soil from adhering to the bucket 5a.
[0020]
Further, a turbid water suction port 15 having a cleaning brush for cleaning the side plate is disposed outside the upper and lower side plates 14, and the turbid water suction pump 16 sucks the turbid water to collect the water collecting pipe 30. And discharged from the water injection nozzle 18 into the dredge bucket 5 '. The cover 12 is opened in the direction of dredging by moving the guide plate 32 fitted to the projection 31 with a hydraulic cylinder (not shown). Only the lower suction port is activated.
[0021]
The rotary dredging bucket 5 'described above sucks the sludge adhering to the bucket 5a, cleans the bottom mud adhering to the bucket 5a with the water jet nozzle 18, and cleans the sludge adhering to the side plate 14. Since it is sucked together with the nearby turbid water, it is possible to prevent the sludge from diffusing into the water during dredging.
[0022]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the dredger of the present invention, when the sludge on the bottom of the water is dredged by the dredging device, the sludge has a structure capable of preventing the sludge from diffusing in the water, and has a structure capable of following the fluctuation of the hull and the unevenness of the bottom mud. Therefore, it is possible to prevent the diffusion of sludge at the time of dredging, and in particular, the present invention is effective in preventing underwater diffusion of sludge when dredging bottom mud contaminated with dioxin and the like. .
[Brief description of the drawings]
FIG. 1 is a side view of a hull of a dredger of the present invention.
FIG. 2 is a plan view of the hull of FIG. 1;
FIG. 3 is an enlarged side view for explanation of a ladder provided below the hull of FIG. 1;
FIG. 4 is a plan view in which a rotary dredging bucket is provided at the tip of the ladder of FIG. 3;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a front view of an adjustment state in a horizontal dredged ground of a hull sway absorbing device provided on the hull side of the rudder of FIG. 1;
FIG. 7 is a side view in the BB direction of FIG. 6;
FIG. 8 is a front view of an adjustment state in the inclined dredged ground of the apparatus of FIG. 6;
FIG. 9 is a side view of the openable / closable dredge bucket shown in FIG. 1;
FIG. 10 is an enlarged plan view of FIG. 9;
FIG. 11 is a side view of FIG. 10;
FIG. 12 is a side view showing the bucket storage state of FIG. 9;
FIG. 13 is a side view of a rotary dredging bucket provided at the tip of the ladder of FIG. 5;
FIG. 14 is an enlarged plan sectional view for explaining the dredge bucket of FIG. 13;
FIG. 15 is a side view in the CC direction of FIG. 14;
FIG. 16 is a side view in the DD direction of FIG. 14;
FIG. 17 is a side sectional view taken along the line EE of FIG. 14;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dredge 2 Rudder 5 Dredge bucket 10 Suction pipe 13 Pumping pump 14 Side plate 16 Suction pump

Claims (3)

A rudder is provided so that it can swing back and forth downward from the dredger, and the dredge bucket provided at the tip of the rudder is also attached so as to swing separately in the back and forth direction, and the rudder itself tilts in the left and right direction of the dredger. A free dredger. 2. The dredging vessel according to claim 1, wherein two dredging buckets are attached to the front and rear directions of the ladder such that the respective openings face each other and are swingable with each other, and a suction pipe leading to a vacuum pump is introduced into each bucket. Rotary dredging that pumps the bottom mud collected by the bucket with a pressure pump, sucks the bottom mud adhering to the bucket and the turbid water generated when collecting with the bucket with the suction pump, and pumps the bottom mud with the pressure pump. The dredger according to claim 1, further comprising a bucket for use.

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