JP3182587B2 - How to advance a pump dredger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for advancing a pump dredger which can advance the dredger more efficiently than ever before by making a slight improvement to an existing pump dredger.

[0002]

2. Description of the Related Art Conventionally, when a pump-type dredger is advanced, one spud 2 of a hull 1 having two spuds 2 and 3 is cast and swung as shown by an arrow A, as shown in FIG. After one wing dredge is completed,
As shown in FIG. 12, the hull 1 is once swung back to the vicinity of the center in the direction of arrow B, the spud 2 is pulled up, replaced with another spud 3 as shown in FIG. To advance to the state shown in FIG.

As described above, in the conventional method, since the hull 1 is purposely returned to the vicinity of the center from the place where the dredging of one wing is completed, the forward work takes time and the forward work is performed. In the meantime, it is necessary to send water by a pump in order to prevent the inside of the sand discharge pipe from being blocked, and there is a problem that the mud content decreases. Such a hull advancing device is a spud that is connected to a rear end of the hull through a hinge structure and a drive cylinder so as to be movable in the longitudinal direction of the hull, as in the invention of Japanese Utility Model Laid-Open No. 23499/1985. An advancement device having an attachment body and a spud and an elevating drive unit for the spud is known thereon. Later, unless the hull is returned to the center to some extent, forward operation can not be done,
There was a similar problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to reduce the advance time by making a slight improvement to an existing pump dredger. It is an object of the present invention to provide a method for advancing a pump dredger which can be performed and does not lower the mud content during dredging work.

[0005]

In order to achieve the above object, a method for advancing a pump-type dredger according to the present invention comprises the steps of: An arm member having a spud and rotatably connected to the other end a hydraulic cylinder on the hull,
In the state where it is rotatably mounted with the above hole as a fulcrum, after the other swing is fixed and the one swing is completed,
The forward spud is cast, the fixed spud is pulled up, and then the arm member is rotated by a hydraulic cylinder to advance the hull.

[0006]

According to the advancing method described above, after one swing is completed for dredging around the fixed spud, the advancing spud at one end of the arm member added according to the present invention is cast as it is, and the fixed spud is pulled up. The hull can be advanced by rotating the arm member with a hydraulic cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment to which the forward method of the present invention is applied will be described. FIG. 1 is a schematic plan view of a pump-type dredger to which the forward method of the present invention is applied, and FIG. It is an explanatory enlarged plan view of an arm member. First, the pump-type dredger shown in FIG. 1 has two spuds as in the related art. In this embodiment, the right spud of the hull 1 is a fixed spud 11, and the left spud is removed. As shown in FIG. 2, the removed spud hole 12 has an advancing spud 13 at one end and an arm member 15 rotatably connected to a hydraulic cylinder 14 on the hull 1 at the other end. It is mounted rotatably.

Next, the forward spud 1 constructed as described above
The procedure for advancing the hull 1 in which the arm member 15 having the arm 3 is attached to one of the spud holes 12 from which the spud of the existing pump dredger has been removed will be described first.
After one swing A in which dredging is performed centering on the right fixed spud 11 placed in the state shown in FIG. 4 is completed, the fixed spud 11 is placed with the forward spud 13 placed as shown in FIG.
5 and the arm 15 is rotated by the hydraulic cylinder 14 as shown in FIG.

At this time, as shown in FIG. 5, the left and right swing wires 16 each having one end locked to the anchor 17 are wound or loosened, respectively, so that the fixed spud 11 is aligned with the center line. Shall be finely adjusted. As described above, as soon as the operation of dredging while swinging is completed, the operation of moving forward without repeating the hull 1 is repeated, so that the time required for moving forward can be greatly reduced as compared with the conventional example.

Next, FIGS. 3, 4 and 5 show the procedure of forward movement of the hull 1 at the time of right swing, but FIGS. 6, 7 and 8 show the forward movement of the hull 1 at the time of left swing.
The operation is performed as in the case of the right swing, in which case only the operation direction of the hydraulic cylinder 14 is reversed. Each of the spud portions shown in FIGS. 3 to 12 is shown in black, in a spud setting state, and in white, a spud lifting state.

[0011]

According to the advancing method of the present invention described above, the pump type dredger can advance at the position where the swing has been completed, so that the time required for the advancing operation is shortened and the operation efficiency is significantly improved. . In addition, the present invention can be applied at low cost and is economical, since only one spud of an existing dredger is removed and a forward spud is attached using the spud hole. Further, by shortening the forward operation time, there is an advantage that the time for sending the water for preventing blockage into the sand discharge pipe is reduced as compared with the conventional example, and a decrease in the mud content can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a pump-type dredger to which the advancing method of the present invention is applied.

FIG. 2 is an enlarged plan view for explaining the arm member of FIG. 1;

FIG. 3 is an explanatory view at the end of one swing of the center of a fixed spud when the hull of FIG. 1 moves forward during a right swing.

FIG. 4 is an explanatory view at the time of driving forward spuds shown in FIG. 3;

FIG. 5 is an explanatory view of a forward movement state of FIG. 4;

FIG. 6 is an explanatory view at the end of one swing of the center of a fixed spud when the hull of FIG. 1 moves forward at the time of left swing.

FIG. 7 is an explanatory view at the time of driving forward spuds of FIG. 6;

FIG. 8 is an explanatory view of the forward movement state of FIG. 7;

FIG. 9 is an explanatory diagram at the end of one swing in the forward direction of a conventional hull.

FIG. 10 is an explanatory diagram of a state in which the swing is once returned to a position near the center from the state of FIG. 9;

FIG. 11 is an explanatory view in which another spud is replaced in the state of FIG. 10;

FIG. 12 is an explanatory view of a state in which the wing swings forward in FIG. 11;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Fixed spud 12 Spat hole 13 Advance spud 14 Hydraulic cylinder 15 Arm member

Claims (1)

(57) [Claims] 1. An arm member having a forward spud at one end in a hole of one of two spuds removed from a pump type dredger, and a hydraulic cylinder on a hull rotatably connected at the other end. In the state where the other spud is rotatably attached with the above-mentioned hole as a fulcrum, after one swing is completed as a fixed spud, the forward spud is driven, the fixed spud is pulled up, and the hydraulic cylinder is used. A method of advancing a pump-type dredger for rotating the arm member to advance the hull.