JPS61238584A - Overshore buoy - Google Patents

Abstract

PURPOSE:To obtainsimplified connecting and mooring operation of an offshore rope through vertical movement of a buoy by providing a spherical buoy of rubber whose buoyancy is adjustable through charging and discharging of air with upper and lower rings to which the offshore rope body is connected through strops and adjusting air to be charaged and discharged. CONSTITUTION:A sperical buoy 1 of rubber having sufficient strength is connected with an air hose 4 to make the buoyancy adjustable through charge and discharge of air, so that the buoy 1 is movable up and down in the sea. The buoy 1 is provided with upper and lower rings 2,2' to which an offshore rope body 02 having one end locked to a sinker on the sea-bottom is connected at the other end through strops 01,01'. when the offshore rope 02 is out of use, air in the buoy 1 is discharged to lower the buoy in the sea. When it is in use, air is charged in the buoy 1 to float the buoy 1, to which a rope 03 from a moored ship is connected. This avoids necessity of a prefetch rope which has been conventionally used, permitting simple connecting operation.

Description

DETAILED DESCRIPTION OF THE INVENTION A [Object of the Invention] (1) Field of Industrial Application The present invention relates to improvement of offshore/tension floating bodies for mooring ships to quays in ports.

(2) Conventional technology When mooring a ship at a quay, etc., to support the wind pressure from the sea side, offshore tension cables are usually strung between the bow and stern of the ship and a sinker or temporary anchor on the offshore seabed. (4th
(see figure). In Figures 4 to 6, 01 is a ship, 0
2 is a sinker or temporary anchor on the seabed, 03 is an offshore tension cable, o4 is a quay, 05 is its fender, and 106 and 06' are bollards at the bow, section, and stern, respectively, and these parts are arranged in the relationship shown in the drawing. It is set up.

When this offshore cable 03 is not in use, it is sunk to the seabed by its own weight, and the preemption wire W0 (see Figure 6) is carried by a small boat S.
It is lowered from the ship, spliced with a rope, and then hoisted up. This work is carried out at the warping end 07 (see Figure 6) on the small boat, and when the offshore tension cable 03 reaches the deck of the small boat, it is hoisted up. Another winch drum 08 as shown
It is now possible to replace it with the lower winding wire W2, wind it around the winch drum 08, and attach the offshore cable.

The above conventional example: (1) requires a long lead-in wire W1, and is subject to significant wear and tear due to rusting;

(2) Winding and cutting the lead-up wire W with the weaving end 07 is a work that requires skill and is done exclusively by human labor, and the work is dirty with mud and wet with seawater and continues for a long time.

(3) Mooring work takes a long time due to unnecessary troubles such as getting tangled with other wires on the seabed or getting caught on underwater obstacles.

(4) When mooring a small boat next to a large boat, it is necessary to use a dipper to pass the preemption wire W1 under the bottom of the boat to the quay.

There were drawbacks such as.

(3) Problems to be Solved by the Invention The problem to be solved by the invention is to eliminate the drawbacks of the above-mentioned conventional techniques.

[Structure of the Invention] (1) Means for Solving the Problems The present invention has been proposed to eliminate the drawbacks of the above-mentioned conventional example, and includes a buoyant body connected to the switching handle via an air hose, The attachment installed on the floating body has multiple links for connecting wires, etc., a safety valve to deal with sudden pressure fluctuations, and an emergency wire that serves both to prevent the air hose from surfacing and as an emergency towing cable. The problem is solved by constructing an offshore floating body that is characterized by the ability to take out and store the main body of the offshore cable by floating and sinking.

(2) Function The offshore floating body of the present invention has the above-mentioned configuration, and there is no need for a long lead wire for passing the offshore tension cable, and the work of winding the lead wire is halved. ,
Work becomes easier.

It also eliminates the need to handle wires that are dirty with mud or wet with seawater. In addition, there is no need to take precautions to prevent the lead wire from getting entangled with other wires when returning it to the quay, or to prevent the land side cable from riding on the wire, making the work easier. In addition, undersea obstruction υ
This reduces mooring work time.

(3) Example Hereinafter, the offshore floating body of the present invention will be explained in detail with reference to the example shown in FIG. It has flexibility that does not create any residual air space inside when air is vented.2.2'
are the upper and lower rings fixed to the upper and lower parts of the floating body 1, and their strength is equal to the buoyancy. 3 is a safety valve attached to the appropriate position of the floating body 1, and the safety valve 3 is In order to prevent the floating body 1 from rupturing even if it rises suddenly from the seabed at a depth of about 25 m, it is configured to operate with a pressure difference between the inside and outside of 3.5 kl!/cm2.The buoyant force is also determined by the weight of the offshore tension cable (undersea )
It is set to be enough to overcome. Reference numeral 4' denotes an air hose attachment port provided at a suitable location on the floating body 1 as shown in the figure.The air hose 4 is connected to the floating body 1 through this attachment port 4', and compressed air is injected and expelled. The air hose 4 is an element that determines the position of the buoyancy body 1, and is sufficiently long in consideration of the aqueous content. Further, the air hose 4 is a special hose that is strong enough not to be crushed even if an offshore cable rides on it on the seabed.

5 is attached to the air hose 4 to prevent the hose 4 from levitating, and at the same time serves as an emergency towing line in case the buoyant body ② becomes unable to float due to some reason.

In Fig. 2 6, reference numeral 7 denotes a switching handle interposed between the factory air quay port 41 and the air hose 40, and the switching handle 7 has three functions: air supply, neutral, and air exhaust. By opening and closing the valve 8 shown in FIG. 2, air is injected into the buoyant body 1 and air is evacuated using only this mold.

One embodiment of the offshore floating body of the present invention is configured as described above, and as shown in FIG. float above the sea surface.

At this time, the offshore cable main body 02 attached to the lower ring 2' with the strobe 01' is also lifted to near the sea surface. Then, the strobe 01' that led the offshore cable main body 02 to the upper ring 2 via the strobe 01 attached to the lower ring 2' is removed and connected to the rope 03 lowered from the ship.

Then, the rope 03 is wound up until the end of the offshore cable main body 02 appears above the sea surface, and then the lead wire 04, which has been lowered separately from the ship, is attached to the offshore cable main body 02.

If you wind up the preemption wire 04 and strobe 01
If it becomes loose, remove it from the lower ring 2' and cut the edges.

The subsequent work is the same as before. Sea surface 1 (The remaining buoyant body 1 has been turned upside down because the weight is gone, so attach the rope 03 that was used first, tie it together lightly, and float it nearby.

In addition, the procedure for recovering the offshore cable main body 02 when leaving the shore is the reverse of the above procedure.

C [Effects of the Invention] Since the offshore floating body of the present invention has the above-described configuration and function, the present invention eliminates the need for (1) a long lead wire for passing the offshore cable body; Therefore, the work of winding up a long winding wire with a warping end is halved, and not only can the work be done easily and quickly, but it also eliminates the need to handle wires that are dirty with mud or wet with seawater.

(2) The work is made easier by eliminating the need to take precautions to prevent the hanging wires from getting tangled and to prevent the land-side cables from riding on the soil, which were required when returning the take-ahead wires to the quay.

(3) The mooring work time can be expected to be shortened as the mooring will no longer be caught on submarine obstacles.

(4) Due to the nature of the wire itself, the distance between the main body of the offshore cable (/
Since the twist caused by 'C' is untwisted by the automatic rotation of the floating body, the life of the wire is extended and the winding operation on the warping board is facilitated.

The following practical effects can be mentioned.

[Brief explanation of drawings]

Figures 1 and 2 are schematic explanatory diagrams of one embodiment of the present invention. Figure 1 is a perspective view of the buoyancy body and attached parts, and Figure 2 is an explanation showing the relationship between the switching handle, air hose, and on-off valve. Figure 3 (Al, CB), (C1, (DJ is an explanatory diagram of the operating bear) Figures 4 to 6 are schematic explanatory diagrams of the conventional example, Figure 4 is a side view, and Figure 5 is a side view. The figure is a side view of the offshore cable main body when it is on the seabed, and Figure 6 is a plan view of the offshore cable main body when it is lifted onto a small boat. 1: Buoyant body, 01 Nistrope, 02: Oki tension cable body, 03: Rope, 4: Air hose. Sub-agent: Patent attorney Teru Ito (2 others)

Claims (1)

[Claims] a buoyant body connected to the switching handle via an air hose;
It has multiple rings that connect the attachment wires etc. installed on the floating body, a safety valve to deal with sudden pressure fluctuations, and an emergency wire that also serves as an emergency tow rope and prevents the air hose from surfacing. An offshore floating body characterized by the ability to take out and store the main body of the offshore cable by floating and sinking.