JPH0316925Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a suction dredging device mainly used for dredging the base of a quay.

(Prior art) Conventionally, a dredging pump ship is generally used for dredging ports and rivers, and a rudder that is swingably attached to the dredging pump ship is equipped with a cutter that is rotatably driven at the tip of the rudder. Generally, a suction pipe was inserted through the suction pipe, the cutter was used to excavate the earth and sand at the bottom of the water, and the excavated earth and sand was sucked together with water through the suction pipe.

(Problems of the prior art to be solved) In such conventional dredging equipment, there is a rotating cutter at the tip of the rudder, so when dredging the base of a quay or floating structure, the cutter is There was a problem in that the external walls of quays etc. were damaged due to this. In order to prevent such damage, a method of attaching a cover to the upper outer periphery of the cutter has been considered, but this would result in insufficient dredging of the base of quays and structures.

In view of these conventional problems, it is an object of the present invention to provide a dredging device that can easily dredge completely to the base without damaging the outer wall surfaces of quays and floating structures.

(Means for Solving the Problems) In order to solve the above-mentioned problems of the conventional art, the present invention has been developed by installing a suction dredging device using a cutter protruding from the tip of a rudder that is swingably attached to a dredging pump ship. A cylindrical cover part that covers the mounting shaft is integrally attached to the lower part of the cover in a position extending forward on both sides of the sand suction port opened at the tip surface of the ladder, and the ladder is lowered diagonally to the bottom of the water. The suction head is formed in a tapered shape so that the lower edge is oriented almost parallel to the bottom surface of the water, and is composed of a shielding plate with claws protruding from the lower edge.
A high water pressure jet nozzle is provided on the suction head downwardly in front thereof and communicates with a high pressure water supply pipe, and an obstacle sensor extending forward is provided at the upper end of the suction head, and the obstacle sensor is provided with a pair of support springs. A limit switch and a switch operating element are attached, which are supported so as to be rotatable back and forth, right and left, and up and down.

(Function) The suction type dredging device of the present invention injects jet water from a high-pressure water jet nozzle, excavates the lower front part of the suction head with this jet water, and sucks the excavated earth and sand together with water from the earth suction port. let When the tip of the suction head approaches an external wall such as a quay, an obstacle sensor detects this and notifies the operator to prevent a collision. However, since the jet water excavates the area in front of the suction head, it is dredged cleanly down to the outer walls at the base of quays and floating structures. Moreover, due to the presence of the shielding plate, the earth and sand excavated on the front side is not dispersed and is sucked through the earth and sand suction port.

(Example) Next, an example of implementation of the present invention will be described in detail with reference to the drawings.

1 in the figure is a ladder. Although this ladder 1 is not shown, like conventional equipment, the tip side is supported so that it can swing up and down with respect to the dredging pump ship, and the tip side is oriented diagonally downward from the ship to reach the bottom of the water to be dredged. I try to make it possible. Furthermore, a head support plate 2 is attached to the tip of the ladder 1, and a cutter shaft 3 is protruded from approximately the center thereof. Further, a dirt suction port 4 is opened in the lower part of the head support plate 2, and a suction pipe 5 leading to a dredging pump ship is connected to the back side of the port 4.
During normal dredging, an excavating cutter (not shown) is attached to the cutter attachment shaft 3, and the cutter is forcibly rotated to perform dredging.

The above structure uses a conventional suction type dredging device, but the cylindrical cover part 6 that covers the cutter mounting shaft 3 from which the excavation cutter described above is removed is used.
The suction head 7 is provided with a suction head 7 having a diameter. A pair of shielding plates 8, 8 are integrally attached to the lower surface of the suction head 7 so as to extend forward from both sides of the earth and sand suction port 4 mentioned above. The shielding plates 8, 8 are formed in a tapered shape so that when the rudder 1 is lowered diagonally to the bottom of the water, the lower edges are oriented almost parallel to the bottom surface of the water, and the lower sides are arranged to spread out from each other. It is installed at an angle. Further, claws 9, 9, . . . are provided protruding from the lower edge at regular intervals.

In addition, the suction head 7 is provided with a number of reinforcing ribs 10, 10, . Projecting brackets 11, 11, . . . are secured with bolts.

The upper part of the suction head 7 is provided with high pressure water jet nozzles 12, 12, . . . . This nozzle 12 is attached to a distribution pipe 14 which is supported in a horizontal arrangement with brackets 13, 13, at the lower front side thereof, and in a linear arrangement, respectively, facing downwardly in front of the suction head 7. A high-pressure water supply pipe 15 is connected in a T-shaped arrangement to the back of the central portion of the distribution pipe 14, and high-pressure water is sent from a dredging pump ship.

Furthermore, an obstacle sensor 16 is provided on the front end of the suction head 7. This sensor 16 is mounted on a pair of support springs 18, 1 at the upper end of a support column 17.
8, the switch base 19 is supported so as to be rotatable back and forth, left and right, and up and down.On this switch base 19, a limit switch 20 and a bar-shaped switch operator 21 protruding in front of the base 19 are mounted. is installed. Incidentally, the suction head 7 may be welded to the tip of the ladder 1.

The suction type dredging device constructed in this way is constructed by removing the cutter at the tip of the ladder 1, attaching the suction head 7, operating the ladder 1 to lower the suction head to the base of the quay at the bottom of the water, and from the nozzle 12. While jetting high-pressure jet water, suction is made from the earth and sand suction port 4. At this time, the water bottom is excavated by the jet water, and the excavated soil passes between the shielding plates 8 and 8 and is sucked into the soil suction port 4 together with nearby water. The suctioned earth and water is then discharged onto the ship or into a landfill.

In this way, some dredging pump vessels and rudders 1 are operated while dredging work is carried out, and when the switch operator 21 of the sensor 16 comes into contact with a quay, etc. during the dredging operation, the limit switch 20 is operated, and the operator is directed to the quay, etc. Alerts you when the wall approaches.

(Effects of the invention) The suction dredging device of the invention is constructed as described above, and includes a suction head having a cylindrical cover part that covers the cutter mounting shaft and a shielding plate that guides the earth and sand suction port, and a lower front part of the suction head. By being equipped with a high-pressure water jet nozzle directed toward the water, the front of the suction head is excavated, and the lower edge of the shield plate is tapered so that when the rudder is lowered diagonally to the water bottom, the lower edge is oriented nearly parallel to the water bottom surface. Because it is tapered and has claws protruding from the lower edge, it effectively sucks up the excavated soil without spreading it to the surrounding area. This enabled dredging to be carried out well, and the installation of obstacle sensors alerts the operator of the approach of the suction head underwater to a quay, etc., before a collision occurs.
This prevents collisions and allows dredging of the base of quays and floating structures without damaging their external surfaces.

In addition, the obstacle sensor is constructed by attaching a limit switch and a switch operator, which are supported by a pair of support springs so as to be rotatable back and forth, left and right, and up and down. Even if it falls, it will not be easily destroyed.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention.
The figure is a longitudinal sectional view, and FIG. 2 is a front view. 1... Ladder, 2... Head support plate, 3... Cutter mounting shaft, 4... Sediment suction port, 5... Suction pipe, 6... Cylindrical cover portion, 7... Suction head, 8... Shielding Plate, 12... High pressure water jet nozzle, 16... Obstacle sensor.

Claims (1)

[Scope of utility model registration request] A cylindrical cover part that covers a cutter mounting shaft protruding from the tip of a rudder that is swingably attached to a dredging pump ship, and a cylindrical cover part that extends forward on both sides of the earth and sand suction port that opens on the tip surface of the rudder. It is integrally attached to the lower part of the cover, and is formed in a tapered shape so that when the rudder is lowered diagonally to the water bottom, the lower edge is oriented almost parallel to the bottom surface of the water, and the lower edge has a claw. A suction head consisting of a protruding shielding plate is provided, and a high-pressure water jet nozzle is provided on the suction head downwardly in front thereof and communicated with a high-pressure water supply pipe, and an obstacle sensor extending forward is provided at the upper end of the suction head. A suction type dredging device comprising: a limit switch and a switch operator, each of which is supported by a pair of support springs so as to be rotatable back and forth, right and left, and up and down.