KR100576101B1 - Apparatus for burying cable line simultaneously with excavating Submarine surface - Google Patents

Abstract

The present invention uses a waterjet device that sprays water at high pressure provided by a laying ship, and controls the water jetting force according to soft rock, hard rock, and sandy soil that form the seabed strata. The present invention relates to an apparatus for laying cables at the same time as the drilling of a seabed that can bury wires.

The present invention is connected to the branch rope of the marine laying ship, respectively, a set of ballasts seated on the sea bottom; Buoyancy means mounted to the bottom of each of the pair of ballast, the balance of the ballast when the bottom is uneven; Water jet means provided in the central portion of the set of ballast, the water is supplied through the water supply line of the laying vessel to the high pressure to spray to the sea bottom surface to excavate; And an internal space for guiding the submarine drawn out from the laying vessel to be installed in the excavation unit, and a plurality of discharge holes for discharging the high pressure water provided from the waterjet unit to one side of the waterjet means. Provided is an apparatus for laying a cable at the same time as the bottom surface excavation including a scraper for forming and excavated rock debris and sand soil.

Submarine, Laying Vessel, Waterjet Nozzle Pump, Scraper, Ballast, Buoyancy Tank

Description

Apparatus for burying cable line simultaneously with excavating Submarine surface}

1 is a schematic view showing a partial configuration of a submarine cable burying machine according to the prior art.

Figure 2 is a perspective view showing an embodiment configuration of a seabed drilling device for a submarine buried machine according to the present invention.

Figure 3 is a side cross-sectional view of a scraper that is the main portion of the present invention.

* Explanation of symbols for main parts of the drawings

1: ballast 2: tow rope

3: scraper 4: hydraulic cylinder

5: guide support member 6: waterjet high pressure nozzle pump

7: pressure pump 8: nozzle sensor

9: buoyancy tank 10: level sensor

11: air pump

The present invention relates to a submarine line buried machine that continuously embeds a submarine line including a communication cable, a power line, an oil pipeline, a water pipe, and the like at the same time, and particularly includes a soft rock forming a seabed using a waterjet operated at a high pressure. The present invention relates to a device for laying a seabed and at the same time drilling a seabed that can bury a seabed on an excavated bottom, regardless of the soil such as hard rock and gravel mixed sand.

In general, a submarine buried device is a device used to establish a communication or power line on land and islands, or to bury long-distance oil pipes and water pipes through the sea on the sea floor. And a submersible having an underwater compressor, hydraulic cylinder, etc., on which an air compressor, a cable drum, etc. are loaded; It is largely composed of an excavator equipped with a hydraulic jet nozzle connected to the submersible pump of the submersible to excavate the seabed surface broken by the plow.

Conventional submarine embedding machine configured as described above excavates the first subsea ground with a plow provided in a submersible, breaks through the seabed surface with strong blowing force through the hydraulic spray nozzle connected to the submersible pump, and in the place Buried.

Undersea ship embedding machine of the above structure is mainly applicable to soft sea bed, and ground such as soft rock, gravel mixed sand, hard rock, etc. cannot be excavated, and the sea bottom was excavated using underwater blasting work or diver. . However, the above method has a very troublesome seabed ground excavation work, contains a lot of risks, and excessive cost.

In order to overcome this problem, as shown in FIG. 1, in Korean Patent Publication No. 91-0006816, the submarine 200 is towed through the laying vessel 100 and includes a plow 201 and a weight body 202. The screw 203 with the cutting bit 203a, the hydraulic motor 204 for rotating the screw, the hydraulic pipe 205 with the injection nozzle, and the soil excavated by the screw are discharged to the soil at the same time. There has been proposed a trough and backfill device for subsea cable embedding machines consisting of an excavator 210 with a cable guide tube 206 for backfilling cables that are laid.

However, the above structure does not have any problem in excavating soft rock or ordinary rock. However, even if the cutting bit 203a is rotated at high speed, it is difficult to break the hard rock at the bottom. When hitting the rock, there was a problem that the excavation and laying work by bypassing the soft rock or sandy soil layer.

In addition, the submersible 200 may be overturned by the rotational force of the screw 203 according to the traction force of the laying vessel 100 and the ground state of the bottom surface, in which case the submarine cable supplied from the laying vessel 100 is There is a problem that a twist or break occurs.

Therefore, the present invention has been proposed to solve the above problems, the hydraulic jetting force according to the soft rock, hard rock, sandy soil forming the seabed strata using a waterjet device spraying water at high pressure provided from the installation ship The purpose of the present invention is to provide a device for embedding the seabed at the same time as the bottom surface excavation, which can bury the seabed on the excavated surface while at the same time quickly and smoothly excavating the bottom.

In addition, the present invention is provided with a sensor and a buoyancy device for detecting the bending state and the ground state of the seabed to maintain the balance of the ballast, the twisting of the seabed generated when passing the bent portion or depression of the seabed and the bottom of the seabed Its purpose is to prevent overturning caused by trailing thrust of cable stress such as overload and breakage, and to provide a device to bury the seabed at the same time that the seabed can be buried under the sea floor continuously and reliably. have.

The present invention for achieving the above object is connected to each of the branch ropes of the marine laying vessel is towed, a pair of ballast seated on the sea bottom; Buoyancy means mounted to the bottom of each of the pair of ballast, the balance of the ballast when the bottom is uneven; Water jet means provided in the central portion of the set of ballast, the water is supplied through the water supply line of the laying vessel to the high pressure to spray to the sea bottom surface to excavate; And an internal space for guiding the submarine drawn out from the laying vessel to be installed in the excavation unit, and a plurality of discharge holes for discharging the high pressure water provided from the waterjet unit to one side of the waterjet means. The present invention provides an apparatus for embedding a seabed at the same time as a bottom seam excavation including a scraper to form and excavate rock debris and sand.

The above described features and advantages will become apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3.

The device for embedding the seabed at the same time as the seabed excavation according to the present invention performs the excavation of the ground reliably while controlling the hydraulic spraying force according to the soil quality of the seabed to achieve the laying and embedding of the seabed at the same time, As a result, the ballast is balanced to prevent stress and overturning of the seabed.
In the embodiment of the present invention, as shown in Figures 2 and 3, two ballasts (Ballast) (1), which is connected to the diverted tow rope (2) drawn out of the offshore installation ship and submerged to the seabed; Is installed in the middle portion between the two ballast (2), and has an inner space portion (3a) for receiving and drawing the sea line, a plurality of discharge ports on the inner side of one side, that is, the direction in which the installation ship proceeds (3b) and a scraper (3) for removing the excavated rock debris or sandy soil; A hydraulic cylinder (4) hinged to the axis thereof to change the angle of rotation of the scraper (3); It is provided on the other side of the inner space portion (3a) of the scraper (3), guided to be drawn out to the bottom surface excavated through the scraper (3) without twisting or flow of the seabed (21) under the influence of the algae A guide support member 5; A water jet high pressure nozzle pump 6 connected to the discharge port 3a of the scraper 3 to inject water at a high pressure; A pressure pump (7) mounted on one side of an upper surface of the ballast (1) and connected to a suction portion of the waterjet high pressure nozzle pump (6) to provide a predetermined injection pressure thereto; Nozzle sensors 8 connected to the plurality of waterjet high pressure nozzle pumps 6 respectively and providing a driving signal to the pressure pump 7 so as to sense when they are not operating and automatically pressurize the waterjet high pressure nozzle pump 6. Wow; A buoyancy tank (9) provided at the bottom of the ballast (1) for adjusting the balance thereof; A level sensing sensor 10 which is provided at the rear of the ballast 1 and detects a bent state of the sea bottom; Is mounted on the other side of the upper surface of the ballast (1) is composed of an air pump 11 for injecting air into the buoyancy tank (9).

Here, the buoyancy tank (9) is made of a flat surface that is in contact with the sea floor so that the slide can be effectively moved from the sea bottom.

The level sensor 10 is positioned to face the sea bottom and is mounted at the rear end of the ballast 1 and a sensor detector 10a for detecting a curved state of the ground, and thus the sensor detector 10a is movable. It is composed of a rod portion 10b to be moved.

Reference numeral 15 denotes a power line for supplying power to various pumps.

Referring to Figure 3 illustrates the operating state of the present invention configured as described above.

First, the point where the buried machine will pass through is cleaned several times with a cleaning tool consisting of a rake to remove obstacles (net, wire, rope, etc.) several times. Then, the submarine 21 drawn out through the stern sheave of the laying vessel is provided at the stern end of the laying vessel to be mounted on a guide frame (not shown in the drawing) for avoiding resistance of birds, and then the guide pipe. Through the insert into the inner space portion 3a of the scraper 3, the ballast (1) is seated on the sea bottom. At this time, the sea line 21 is guided by a plurality of guide support members 5 provided on the inner surface of the scraper 3 to be drawn out to the bottom without flow or twist.

Subsequently, the ground curve is sensed using the level sensor 10 provided at the rear of the two ballasts 1, and the detection signal is input to a control device provided in the laying line.

The control device receives the level data of the buoyancy tank 9 installed below the ballast 1, and receives the signal of the level sensor 10 to determine the balance state of the buoyancy tank 9.

When the balance of the buoyancy tank 9 is inclined to one side without being maintained, that is, when one of the two buoyancy tanks 9 is inclined, the air pump 11 provided at the top of the ballast 1 Inject air into the inclined buoyancy tank (9) to raise the level or discharge the air in the other buoyancy tank (9) to lower the level to match the horizontal balance of both side buoyancy tank (9).

As described above, the waterjet high pressure nozzle pump 6 is operated to excavate the sea bottom in a state where the ballast 1 is kept horizontal by adjusting the balance of the buoyancy tank 9. That is, the water provided through the waterline of the laying vessel is supplied to the waterjet high pressure nozzle pump 6 via the pressure pump 7, and the high pressure water discharged from the waterjet high pressure nozzle pump 6 is discharged from the scraper 3. It is sprayed to the bottom surface layer through the discharge port 3b.

Accordingly, the bottom of the sea is excavated by high-pressure jetting force and at the same time, the laying and embedding of the sea bottom is carried out, and the residue of the excavated portion is removed by the scraper 3 which is moved by the towing of the laid ship, The subsea line 21 drawn out through the inner space portion 3a of 3) is installed in the excavation portion.

Subsequently, the ballast 1 is towed by the movement of the laying ship, and at this time, the bottom surface of the buoyancy tank 9 is made flat so as to slide straight along the sea bottom.

During the straight transfer process of the ballast 1, the waterjet high pressure nozzle pump 6 is continuously operated to excavate the sea floor. Water is excavated by injecting water at its own pressure, and when the hard rock layer is formed, a driving signal is applied to the pressure pump 7 so that the water pressure provided by the waterjet high-pressure nozzle pump 6 is further increased. Accordingly, the hard rock is crushed by the high-pressure injection force, it is possible to excavate.

Meanwhile, the nozzle sensor 8 detects the driving state of the waterjet high pressure nozzle pump 6. That is, when there are a number of waterjet high pressure nozzle pumps that are not operated, the nozzle sensor 8 detects this and sends a signal to the control device. The control device operates by operating the pressure pump 7. The high pressure water to the waterjet high pressure nozzle pump 6.

In the above-described series of bottom surface excavation, if the two ballasts 1 are unbalanced due to the presence of depressions or obstacles during the straight movement of the ballast 1, the balance maintaining operation by the buoyancy tank 9 is repeated. Perform the seabed excavation, seabed laying and laying work repeatedly while maintaining the horizontal state.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

According to the present invention as described above, regardless of the soil surface of the seabed consisting of soft rock, hard rock, sand sand, etc. using a waterjet device that provides a high-pressure jetting force to perform excavation quickly and smoothly at the same time There is an effect that can be buried undersea.

In addition, the excavated rock debris or sandy soil is disassembled and moved by the pressure of the high-pressure jet nozzle, and the remaining coarse rock debris is removed by the scraper as it progresses, and at the same time, it is easy to bury the seabed by laying the submarine in its place. It is possible to shorten the air, and because the submarine is drawn out safely supported inside the scraper, there is no effect of cable stress such as flow or twist.

In addition, since the ballast balance is maintained by the buoyancy tank, there is no fear of overturning even when passing over an irregular bottom bend or depression, and there is a conventional problem in that the diver needs to be put on the sea bottom because the bottom rupture is performed automatically. There is another effect that can solve.

Claims (6)

delete delete delete A pair of ballasts connected to the branch ropes of the marine laying vessels and towed, respectively, and seated on the sea bottom; A buoyancy tank into which air is introduced therein, and a level sensing sensor provided at the rear of each set of ballasts to detect the ground state of the sea bottom and the upper part of the ballast to provide air to the buoyancy tank and discharge the air. Buoyancy means provided with an air pump to maintain the balance of the ballast when the sea floor is uneven; It is provided in the central portion of the set of ballasts, and has an inner space for guiding the submarine drawn out from the laying vessel to be installed in the excavating portion, a plurality of discharge ports for discharging the high pressure water to one side is formed on one side; A scraper to remove the excavated rock debris and sandy soil; And A discharge portion is connected to the discharge port of the scraper, a plurality of waterjet high pressure nozzle pumps for spraying the water provided through the water supply line of the laying vessel to a high pressure and spraying the bottom surface, and the plurality of waterjet high pressure nozzles A pressurized pump connected to a suction portion of the pump to pressurize the water pressure provided therein and a nozzle sensor connected to each of the plurality of waterjet high pressure nozzle pumps to detect whether the pump is operated are provided with high pressure water at the bottom of the sea. Waterjet means for digging while spraying Apparatus for embedding the seabed at the same time as the seabed excavation comprising a. The method of claim 4, wherein The buoyancy tank, An apparatus for embedding a seabed at the same time as excavating a seabed, characterized in that its bottom is formed flat. The method of claim 4, wherein The scraper is installed on one side of the inner surface of the guide support member for supporting while guiding the seabed Apparatus for embedding the seabed at the same time as the bottom surface excavation further comprising a.

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