JPS61122333A - Excavating device - Google Patents

Abstract

PURPOSE:To perform excavation over a wide range, by a method wherein plural injection nozzles for carrying excavated soil by a flow are located to the inner peripheral wall of a connection between a suction pipe and a delivery pipe and nozzles for excavation are installed to the outer peripheral wall of the suction pipe to form an excavator, and the excavator is elevatably suspended from a ship. CONSTITUTION:Plural injection nozzles 3 for suction are aligned along the peripheral direction of the inner peripheral wall of a connection between a suction pipe 1 and a delivery pipe 2, injection is effected in a direction of suction, and plural injection nozzles 4 for excavation are arranged along the peripheral direction of the outer peripheral wall of the suction pipe 1 to form an excavator. Water is fed to the nozzles 4 through an introduction passage 14 and driving fluid and the air to the nozzles 3 through a delivery pipe 12 and an air pipe 13. Further, an excavator A is elevatably hung down from a crane on an excavating ship D, a flexible pipe 6 is connected to the delivery pipe 2 of the excavator A, and excavated soil is carried by a flow. This enables to perform excavation over a wide range.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drilling device that uses a jet stream to excavate the seabed and collect sand and the like from the seabed into a ship.

(Prior Art) Conventionally, when excavating the seabed, it has been carried out using, for example, a power shovel. However, in such conventional methods, the dredger must be moved one by one to change the excavation position, and This solved the problem that adjusting the excavation depth was troublesome.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and its purpose is to be able to excavate over a wide range without moving the drilling ship, and to be able to excavate at a deep depth. Adjustments are also made to provide an easy drilling rig.

(Means for Solving the Problems) The present invention includes a plurality of suction injection nozzles 3 disposed along the circumferential direction on the inner circumferential wall of the connecting portion between the suction pipe 1 and the discharge pipe 2, and the suction injection nozzles 3 are arranged in a direction opposite to the suction direction. An excavator A is configured by disposing a plurality of drilling injection nozzles 4 that eject in the same direction around the outer circumference of the suction port 5 of the suction pipe 1, and this excavator A is suspended from a crane E of a drilling boat so that it can be raised and lowered. One end of the flexible conveyor pipe 6 is connected to the excavator A.
The gist of the present invention is an excavation device characterized in that it is connected to a discharge pipe 2 of By using an excavator equipped with an injection nozzle, it is possible to excavate in a wide range without moving the excavator, and the excavation depth can be easily adjusted.

(Example) Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

As shown in FIG. 2, the excavator A has a suction injection nozzle 3 along the circumferential direction on the inner circumferential wall of the connection part between the suction pipe 1 and the discharge pipe 2.
A plurality of excavating injection nozzles 4 are arranged around the outer periphery of the suction port 5 of the suction pipe 1, and a plurality of excavation injection nozzles 4 that eject in the opposite direction to the suction direction are arranged. Suction pipe 1 and discharge pipe 2
An injection chamber 8.9 is formed at the connection part with the suction tube 1, and the injection chamber 8.9 expands in a trumpet shape toward the suction pipe 1. Annular fluid introduction passages 10.11 are provided on each side of the suction pipes of these injection chambers 8.9. The fluid introduction path 10.11 is formed with a suction injection nozzle 3a for ejecting the driving fluid A and a suction injection nozzle 3b for ejecting an air port for pumping water. 12 is a delivery tube, and 13 is an air tube. The excavation injection nozzle 4 projects downward from a fluid introduction path 14 arranged in parallel immediately below the fluid introduction path 11, and the tip of the excavation injection nozzle 4 is located on the outer periphery of the suction port 5.

As shown in Fig. 3, the drilling jet water C is injected from the drilling injection nozzle 4 to excavate the earth and sand on the seabed B, and at the same time, the driving fluid A and the pumping air port are injected from the suction injection nozzle 3. The excavated material C can be sucked through the suction port 5 and recovered into the boat using a flexible conveying pipe 6.

Fig. 2 shows another embodiment of the excavator A, in which the suction injection nozzle 3b is not housed in the injection chamber 9 but is formed directly on the inner wall of the connection part. Fig. 4 shows the equipment installed on a boat. The overall diagram of the excavation mechanism is shown. To recover the excavated material C, seawater, which serves as the driving fluid A, is pumped up by the submersible pump 15 and pumped into the pump 16.
The compressed air is supplied to the excavator A by a compressor 25, and the compressed air is supplied to the excavator A by a compressor 25. 17 is an engine, 18 is a generator, 19 is a suction pipe, 20 is a cap tire, and 21 is a hanging wire. When excavating the seabed, seawater is pumped up by a submersible pump 22, pumped by a pump 23, and then injected from an excavation injection nozzle 4. 24 is a motor.

Note that the excavation means of the present invention is carried out using excavation jet water, but if the seabed is hard such as rock, an excavation blade may be attached to the tip and excavation may be performed by rotation of the excavation blade.

FIG. 5 shows an embodiment in which a drilling rig A is suspended from a crane E on a boat so that the suction port 5 of the drilling rig A is always brought close to the seabed depending on the water depth.

(Effects) As described above, the present invention arranges a plurality of suction injection nozzles along the circumferential direction on the inner peripheral wall of the connection part between the suction pipe and the discharge pipe,
An excavator is constructed by arranging a plurality of drilling injection nozzles that eject in the opposite direction to the suction direction around the suction port of the suction pipe, and this excavator is suspended from the crane of the excavation ship so that it can be raised and lowered, making it flexible. One end of the conveying pipe with the characteristics of the excavator is connected to the discharge pipe of the excavator, and the other end of the conveying pipe is opened inside the ship, making it possible to move the excavator horizontally and vertically using a crane, and thus move the excavator. This has the effect that excavation can be carried out over a wide range without causing any damage, and the excavation depth can also be easily adjusted.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are a vertical sectional view and a bottom view showing an embodiment of the excavator of the present invention, Figure 2 is a longitudinal sectional view showing another embodiment of the excavator of the present invention, and Figure 3 is a vertical sectional view showing another embodiment of the excavator of the present invention. 4 is a schematic diagram showing the excavation work using the excavator, FIG. 4 is a schematic diagram showing the excavation device, and FIG. 5 is a schematic diagram showing the excavation work using the excavator. 1-m-suction pipe, 2--discharge pipe, 3--injection nozzle for suction, 4--injection nozzle for excavation, 5--suction port, 6-transport pipe, A...-excavator, D-excavation ship, e-crane

Claims (1)

[Claims] (1) A plurality of suction injection nozzles are arranged circumferentially on the inner peripheral wall of the connection part between the suction pipe and the discharge pipe, and a plurality of excavation injection nozzles that eject in the opposite direction to the suction direction are arranged on the outer periphery of the suction pipe. This excavator is suspended from the crane of the excavation ship so that it can be raised and lowered freely, and one end of the flexible conveyor pipe is connected to the discharge pipe of the excavator, and the other end of the conveyor pipe is connected to the discharge pipe of the excavator. A drilling rig characterized by an opening inside a ship.