JPS63242282A - Float transport type sea water curtain apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a marine water dipping device used for promoting and blocking the diffusion of gas leaked into the sea from ships, etc., and reducing radiant heat when flammable gas is ignited. In addition to being transported by floating on the sea surface, it is also possible to change the position of the water tank by using a floating body that moves on the sea.

[Conventional technology]

Marine transportation by ship is sometimes used as one of the methods for transporting flammable gases such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG), toxic gases, and the like.

In the event of a collision or other disaster involving a ship transporting such gas, the stored gas may leak into the sea, spreading and spreading over a wide area at high concentrations, posing a danger of explosion or fire. There is a risk that the surrounding environment may deteriorate and cause human damage, so some kind of countermeasures are required.

[Problem that the invention seeks to solve]

On land, a device that forms a water curtain is sometimes installed in advance as a device to block the diffusion of such gas and promote its diffusion into the sky.

However, in the case of ship disasters, the location of the occurrence is not fixed;
Moreover, since it is located on the sea, it is not possible to install it fixedly on the sea in advance in anticipation of a disaster occurring.

Furthermore, if you try to form a water curtain on the sea to surround the entire area where there is a risk of gas leakage, as is the case on land, you will end up with a long device that is at least twice as long as the ship, and it will be difficult to protect the area where the disaster occurred. There are also many problems in terms of workability and economy in transportation and installation.

In addition, when using a device to form a water boat of a certain length, the direction of gas outflow may change due to changes in weather conditions such as wind direction and tidal current at the disaster site, and it must be able to handle this. There is also the problem of not being able to do so.

This invention was made in view of the problems of the prior art, and is capable of effectively blocking gas leakage at unspecified locations on the sea, promoting upward diffusion, and minimizing dangerous areas. The purpose of this invention is to provide a floating marine water curtain device that can be carried out on a floating surface and can respond to changes in the gas outflow direction.

[Means for solving problems]

In order to solve the above-mentioned problems, the floating transport type marine water curtain device of the present invention has two floating bodies that can move on the sea at intervals wider than the width of the leaked gas flow, and a floating body that can move on the sea. The present invention is characterized in that water curtain pipes equipped with water curtain nozzles that are supplied with pressurized water and form a water curtain are foldably connected.

[For production]

Install at least two floating bodies equipped with thrusters, etc. so that they can move on the sea at a distance wider than the width of the gas flow leaking into the sea, connect water g-tubes between them, and form a water curtain with water curtain nozzles. When transporting to the leak site, the water curtain pipe should be folded lυ to bring the floating body closer together to make it more compact, and the position of the water curtain can be changed by moving the floating body. ing.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As shown schematically in FIG. 1, this floating transport type marine water curtain system has two end pontoons 4 arranged at an interval wider than the width of the gas flow 3 leaking from the outlet 2 of the ship 1. At the same time, a central pontoon 5 is installed in the center.
A collapsible water pipe 41 and pipe 6 are connected between these pontoons 4 and 5, and when stretched, a water curtain 7 is formed, while when folded, the distance between the pontoons 4 and 5 is shortened, and the pontoons are towed by a tugboat 8. and transported to the leak site. In addition, each of the end pontoon 4 and the center pontoon 5 has a thruster 9 for moving on the sea.
It is equipped with the ability to change the installation position of Water Curtain 7. Furthermore, in the central pontoon 5,
A water pump for supplying pressurized water is mounted on the water curtain pipe 6, and is driven by electric power supplied from the tugboat 8 via a cable 10 to supply water to both left and right sides.

As shown in Figures 2 to 5, the detailed structure of such a floating transport type marine water curtain device is such that the end pontoon 4 is located underwater and has an underwater part with a pointed tip like a ship. 4a, and a substantially cylindrical floating section 4b formed integrally with the underwater section 4a, so that there is little shaking due to waves, and the explosion-proof structure prevents ignition of flammable gas.

Moreover, the center pontoon 5 has a width equal to or smaller than the width of the end pontoon 4.
The underwater part 5a, which is about twice as wide and has a pointed tip like a ship and is located underwater, and the generally rectangular floating part 5b formed integrally above this underwater part 5a, cause less shaking due to waves. It has an explosion-proof construction.

These two end pontoons 4 and central pontoons 5
A thruster 9 is mounted on the propeller 43, and by rotating a screw 9a that is driven to rotate around a horizontal axis around a vertical axis, it is possible to obtain propulsive force in any direction. Further, a water pump 11 is mounted on the central pontoon 5 to supply water to the water curtain pipe 6.

Between the end pontoons 4 and the central pontoon 5, there is a water R that can be folded to be wider than the width of the gas flow 3 when the distance Y between the end pontoons 4 is widened to the maximum.
One pipe 6 is connected, and the total length is about 150 m.

This water J pipe 6 is constructed by connecting a plurality of pipes 6a/fi made of FRP (t$JM reinforced plastic) via a U-shaped rotary joint 6b to reduce weight. That is, 90 grinding elbows 6c bent from the horizontal direction to the vertical direction are connected to the ends of the tubes 6a, respectively, and 90 [! ! A rotary joint part 6b having a rotary joint that can rotate around a vertical axis is connected to the upper end of the U-shaped bent pipe between the elbows 6C, and the two wooden pipes 6a can rotate around the vertical axis. It can be folded up and the torsion of the tube 6a is transmitted as it is, and the shaking of the water tube 6 is minimized.

One end of the water curtain pipe 6 is connected to the end pontoon 4 with fIJ closed, and the other end is connected to the discharge pipe of the water pump 11 of the central pontoon 5.

In addition, a buoyancy body 6d filled with foamed urethane or the like is attached from the top to both sides of the FRP tube 6a of the water curtain pipe 6, and the buoyancy for holding the water boat pipe 6 above the sea surface is applied to each pontoon 4. It is now given along with .5.

On such a water curtain pipe 6, a large number of water nozzles 12 are installed at regular intervals so as to protrude upward, and by spraying water upward, the height is 20,771 cm! ! i! i water 137 is formed.

As shown in FIG. 4, this water curtain pipe 6 is folded in 111 folds from the square-shaped rotary joint portion 6b while being towed to the leakage site. , the underwater part 4a of the end pontoon 4 and the central pontoon 5
are connected to the underwater part 5a by connecting floating bodies 13, and are designed to be removed near the leakage site.

In addition, as shown in Figs. 2 and 4, a fixed water pipe 6e is attached to the central pontoon 5 to prevent the water curtain 7 from disintegrating in this part, and the water curtain pipe 6 is expanded. They are attached in the width direction of the central pontoon 5 so that they are aligned in a straight line.

In the above-constructed marine water zero device, when on standby or towed, the water curtain pipe 6 is folded up and the water curtain pipe 6 is folded up at the rear of the central pontoon 5, as shown in FIGS. 3 and 4. The end pontoons 4 are arranged side by side, and the central pontoon 5 and the two end pontoons 4 are connected by a connecting floating body 13, like two ships.

In this state, the central pontoon 5 is towed by a tugboat 8 to the vicinity of the leakage site, and the connecting floating body 13 connecting both pontoons 4.5 is removed.

Then, the thrusters 9 of the end pontoons 4 and the central pontoon 5 extend the water curtain pipe 6 in a straight line away from the central pontoon 5, and the leaking gas flow 3
After moving to a position where the water is cut off, the water pump 11 is started and water is sprayed from the nozzle 12 for water 13 to form a water curtain 7 with a height of about 20 m and a culm size of 160 m.

This water #7 blocks the horizontal diffusion of the gas flow 3 to the leeward side, and the water n7 promotes upward diffusion, resulting in a high concentration area where there is a risk of explosion or fire of flammable gas. can be minimized, and the influence of toxic gases on JEI can be minimized.

The water FJ 7 installed in this way is on the leeward side of the gas flow 3.
It is optimal to make the gas flow 3 perpendicular to the gas flow 3 at a certain distance, but at sea, the outflow direction of the gas flow 3 often changes depending on the wind direction and tidal current, and in such cases,
It is necessary to move the water curtain 7.

Therefore, the thrusters 9 of the end pontoon 4 and the center pontoon 5 may be remotely controlled and moved by monitoring from the tugboat 8 or the like, or the ship 1 and the end pontoon 4 may be moved.
At the same time as detecting the position with a radio range finder etc., the wind direction is detected with a wind vane, and based on these detection signals, the water curtain 7 is set at right angles to the leeward side of the leakage part 2 by a certain distance 1i111 "l' Jl direction. The movement of each thruster 9 is controlled by it and I+ to automatically change the position 1u.In particular, the position of the end pontoon 4 is slightly moved back and forth toward the leakage part 2 so as not to widen the width of the gas flow 3. It is also possible to control the water ridge 7 to be formed in an arc shape or the like.

In the above embodiment, the floating body was composed of three pontoons, but it is sufficient if there is a floating body at least at both ends, and if three or more floating bodies are used, the water curtain can be formed not only in a straight line but also in various shapes. In addition, since the floating body has more underwater parts, the sway of the water curtain pipe can be reduced.

In addition, power is supplied to each floating body from the tugboat via cables, but each floating body is equipped with air cylinders and fuel necessary for batteries and generator drive engines, and is powered by a sealed explosion-proof structure. It can be made to be self-sufficient, or it can be floated to the surface of the sea and towed by a tugboat or the like to the leak site.

Furthermore, the water curtain pipe is not limited to one composed of an FRP pipe and a buoyant body, but can also be composed of a cloth hose and an air hose as a buoyant body, and can be made flexible and foldable. If it is good and can be folded, it may have the same configuration.

Furthermore, it is also possible to attach a propulsion device to a floating body or a single floating body to obtain a propulsion force in place of a tugboat, so that the floating body can self-navigate to the leakage site.

〔Effect of the invention〕

As described above in detail with one embodiment, according to the present invention, a collapsible water curtain pipe is connected between at least two floating bodies, so that they can be transported to a disaster site while floating on the sea surface. It is easy to install and does not require on-site loading or unloading.

In addition, since each floating body is equipped with a mechanism that allows it to move on the sea, it is possible to change the installation position of the water curtain to the optimal position, and automatic control using visual remote control or position measuring equipment is also possible. It is possible to effectively promote the diffusion of the gas flow in several places and upwardly without surrounding the entire circumference of the gas flow.

Furthermore, since the water outlet pipes are connected between the floating bodies, the shaking of the water ω pipes can be suppressed compared to the case where there are no floating bodies, and a stable water sieve can be formed.

Additionally, in the event that flammable gas ignites and causes a fire, it can be used to reduce radiant heat.

[Brief explanation of drawings]

Figures 1 to 5 show one embodiment of the floating transport type marine water transport device of the present invention, and Figure 1 is a perspective view of the schematic configuration, and Figure 2 is a perspective view of the schematic configuration.
The figure is a plan view of the water curtain pipe in its expanded state, Figure 3 is a front view of the water curtain pipe in its folded state, Figure 4 is a plan view of the water curtain pipe in its folded state, and Figure 5 is a plan view of the water curtain pipe in its folded state. It is a partial top view of the connection part of. 1... Ship, 2... Leakage part, 3... Gas flow, 4...
...End pontoon, 5...Center pontoon, 6...
・Water 6) Pipe, 7... Water curtain, 8... Tugboat, 9... Thruster, 10... Cable, 11... Water pump, 1
2... Nozzle for water brother.

Claims (1)

[Claims] At least two floating bodies capable of moving on the sea are arranged at an interval wider than the width of the leaked gas flow, and a water curtain pipe equipped with a water curtain nozzle that supplies pressurized water between these floating bodies to form a water curtain is folded. A floating transport type marine water curtain device characterized by being able to be connected together.