JP2581991Y2 - Dredging equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a mud suction / pump tank which forms the core of a mud suction / pump system disposed on a barge at the surface of a water from a dredging device, in particular, a cutter section which excavates and collects mud at the water bottom. A steel pipe is used as the suction pipe connected up to this point, and a universal suction pipe system in which a plurality of steel pipes has a degree of freedom in the three-dimensional direction is employed to move the cutter part in the three-dimensional direction. It relates to a dredging device to be guaranteed.

[0002]

2. Description of the Related Art Heretofore, the present applicant has made various proposals for dredging submerged sediments and suspended mud with a low water content. For example, an earth-moving machine such as a backhoe is mounted on a workboat. A box-shaped cutter unit for excavating and collecting mud is attached to the tip of the work arm of the earth-moving machine, and the mud excavated and collected by the cutter unit is passed through a flexible mud pipe (hose) at the water bottom. It is supplied to the mud pumping tank of the mud pumping system mounted on the barge.

[0003]

However, since the mud pipe that guides the mud excavated and collected by the cutter section to the mud pressure feeding tank is a flexible pipe mainly made of rubber, the inside of the mud pipe is subjected to vacuum force. When the mud is sent to the mud pumping tank, there is a problem in strength that the mud pipe itself buckles due to compressive stress acting on the mud pipe itself,
In addition, there is a problem of wear resistance, such as damage due to friction of mud moving inside the pipe and external damage when being dragged with the movement of the cutter portion.

The present invention solves such a conventional problem. Even if the mud pipe is made of steel and the mud is moved by a vacuum force in the mud pipe, there is no problem in strength, and it is accompanied by dredging work. It is an object of the present invention to provide a dredging device that does not limit the movement of a cutter unit.

[0005]

According to an aspect of the present invention, there is provided a cutter having a cutter section for excavating and collecting mud and a mud pipe having one end connected to the cutter section. Dredging to advance the mud excavation surface by the supporting means for suspending and supporting the mud, to take in the mud from the mud intake of the cutter unit in the traveling direction, and to store the mud in the tank through the mud pipe by a vacuum force. An apparatus, wherein the mud feeding pipe is provided on a connecting portion side with the cutter portion, a turning joint portion serving as a support shaft portion of a turning operation of the cutter portion during dredging work, and an operation in a pitching direction of the cutter portion. An allowable joint portion, a joint portion rotatable in a rotational direction about a pipe axis, a multi-joint joint portion capable of adjusting a distance between the swivel joint portion and the cutter portion, and the cutter Characterized in that it has universal connecting portion configured to connect between a joint portion of the plurality of pipes to allow the rotation of at least.

[0006]

The dredging apparatus having the above-described structure can be used for a sludge pipe formed by connecting a number of rigid pipes such as steel pipes, even when the cutter section is rotated, pitched,
The extension of the free connecting portion in the longitudinal direction is allowed, and the torsion of the cutter portion and the mud pipe can be absorbed.

[0007]

FIG. 1 shows an embodiment of a dredging device according to the present invention, in which A is a box-shaped cutter portion having an open mud intake portion for excavating and collecting mud, B is a mud pipe unit,
The mud excavated and collected by the cutter unit A is supplied to a mud suction pumping tank of a mud suction pumping unit (not shown) by a vacuum force. FIG. 1A is a plan view,
(B) of the figure is a side view of (a) of the figure.

[0008] The mud suction and pressure feeding unit is mounted on a workboard (not shown), and the cutter section A is attached to the tip of a work arm of a backhoe (not shown) mounted on the workboard. The dredging operation is performed while rotating in a fan shape with respect to the work surface, and at this time, the box-shaped cutter portion A is configured to direct the mud intake portion toward the turning side. When the cutter section A is turned, for example, counterclockwise by a predetermined angle with a radius R1, next, the cutter section A is turned clockwise by a predetermined angle with a radius R2 (R2> R1) and counterclockwise with a radius R3 (R3> R2). When this operation is performed for a fixed distance (Rn-R1), the movable range of the working arm or the allowable movable range of the mud pipe unit B described below is reached, and the working boat is moved forward. The stop stakes (spats) provided on the floor are driven into the water bottom to fix the workboat.

The cutter section A is shown in FIGS.
As shown in the figure, a rotary excavator 2 for excavating mud made of a rotary harrow or the like is arranged in a box type case 1 behind a screen 4 on a lattice provided diagonally at a front intake 3, The mud excavated by the excavator 2 is sent through a gap formed below the water stop plate 5 to the mud take-out port 6 provided on the rear end wall, and is connected to the mud take-out port 6. It is sent to the mud suction and pressure feeding tank by the vacuum force through the inside of the mud sending pipe unit B.

[0010] Mud collecting plates 7 are provided around the left and right and above the inlet 3 of the cutter section A. The mud collecting plate 7 collects only mud, and water is provided at a predetermined height and width. The flexible sealing plate 8 prevents water from entering from the bottom side.

The cutter section A has a mounting support section 9 for mounting to the working arm. The support section 9 may be provided with a turning drive section, and a hydraulic motor provided on the turning drive section is driven. The case 1 by 360 degrees or ±
The rotation may be made within an angle range of 90 degrees, and the outlet 6 of the case 1 may be turned in the turning direction for dredging as described above. Further, the cutter unit A may be rotated by rotating the work arm itself. Reference numeral 10 denotes a drive motor of the rotary excavator 2. In addition to the above-described swiveling method, the cutter unit A can perform dredging by running the backhoe on a barge, and can also use a device other than the backhoe.

The mud feeding pipe unit B is constituted by connecting a large number of steel pipes as a whole, and the steel pipes connected in series to the cutter section A are capable of relatively rotating both connected steel pipes around the pipe axis. 2 and constitutes a universal connecting portion that guarantees the degree of freedom of the cutter portion A in three X, Y, and Z directions orthogonal to each other.

Various combinations are conceivable for the number of the joint devices C constituting the universal connection portion and the shape of the steel pipe connected by the joint devices C.
The joint unit CY1 that is rotatable about the Y axis allows the cutter unit A to be turned during the dredging operation. That is, the joint device CY1 becomes the center of rotation of the cutter unit A accompanying the dredging operation.

The joint device CZ1 is rotatable about the Z axis, and allows the cutter portion A to perform a pitching operation.

CX1 and CX2 are joint devices rotatable about the X axis. A joint device CX2 disposed close to the cutter unit A removes the twist generated by the cutter unit A. The joint device CX1 is a mud pipe. It removes the twist of the whole unit.

The joint devices CY2 and CY3, which are rotatable about the Y axis, adjust the radius R at the time of the dredging work freely. The joint devices CY1 and CY2, which form the center of rotation of the cutter section A, are provided. Is constant with the length L1 of the pipe P1, but the pipe P2 between the joint device CY2 and the joint device CY3 is attached to this pipe P2 because it rotates around the joint device CY2. The distance between the joint device CY3 and the joint device CY1 can be freely changed, and if the cutter portion A is moved forward, the length of the radius R can be adjusted to the extended state shown in FIG. it can. Also, the joint device CY3
Is also used as a joint device that gives a degree of freedom of rotation when changing the direction of the inlet of the cutter unit A.

The sludge pipe unit B constructed as described above
Since the flexible connecting portion has degrees of freedom in the three axial directions of X, Y, and Z, the swiveling motion accompanying the dredging work of the cutter portion A, the advancement of the cutter portion A, the entire cutter portion A and the mud pipe unit are performed. Can be absorbed, and the dredging operation can be performed without restricting the degree of freedom of the cutter portion A.

The joint device shown in FIG. 2 has a flange Pf formed on the outer peripheral surface near the ends of the pipes Pa and Pb to be abutted, and a packing Pp provided with a watertight seal and slidability on both sides of the flange Pf. Are arranged on the inner peripheral surface of the ring main body so as to correspond to the two flange portions Pf, and are abutted to have a slight gap between the pipe ends so that the circumferential groove P
The two pipes Pa and Pb can be relatively rotated about the pipe axis by a two-part coupling ring Pr in which g is formed as a pair.

[0019]

As described above, according to the present invention, even when the mud pipe is constituted by a pipe such as a steel pipe, the swiveling motion, pitching operation, and the length direction of the free joint part accompanying the dredging work are performed. And the torsion of the cutter section and the mud pipe can be absorbed, so that the mud pipe is not damaged even if the mud is sucked by the vacuum force.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a dredging device according to the present invention,
(A) is a top view, (b) is a side view of (a).

FIG. 2 is a sectional view of the joint device in FIG. 1;

FIG. 3 is a side view of the cutter unit shown in FIG. 1;

FIG. 4 is a cross-sectional view of the cutter unit of FIG.

FIG. 5 is a plan view of the cutter unit shown in FIG. 1;

FIG. 6 is a front view of the cutter unit shown in FIG. 1;

[Explanation of symbols]

Reference Signs List A cutter unit B mud pipe unit 1 case 2 excavator 3 intake 4 screen 5 water stop plate 6 mud extract port 7 mud collecting plate 8 seal plate 9 mounting unit 10 drive motor P1, P2, Pa, Pb pipe Pf flange Pg Peripheral groove Pp Packing Pr Coupling ring CX1, CX2, CY1, CY2, CY3, CZ1 Joint device

Claims (2)

(57) [Scope of request for utility model registration] 1. A cutter section for excavating and collecting mud, and a mud pipe having one end connected to the cutter section, and supporting means for suspending and supporting the cutter section with respect to a mud excavation surface. A dredging device that takes in mud from a mud inlet of the cutter unit directed in the traveling direction, and stores the mud in a tank through the mud tube by a vacuum force. A joint part that forms a support shaft part of the turning operation of the cutter part during dredging work, a joint part that allows the pitching direction operation of the cutter part, and a rotation direction about the pipe axis. A plurality of pipes, a rotatable joint part, a multi-joint joint part capable of adjusting a distance between the swivel joint part and the cutter part, and a joint part allowing rotation of the cutter part. Dredging apparatus characterized by having at least a universal coupling portion configured to connect to. 2. The joint according to claim 1, wherein the joint that allows the rotation of the cutter is also used as a part of a multi-joint joint that allows the distance between the swivel joint and the cutter to be adjustable. A dredging device characterized in that: