JPS60261475A - Semi-diving type fire fighting ship - 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] The present invention is designed to detect whether there is a risk of deflagration due to oil spilled above the sea surface.
Or, while there is a fire on the sea surface, the tanker ship is on fire and there is an explosion. This invention relates to a semi-submersible fire boat with a special hull that can be used effectively in extreme environments where firefighting activities by conventional fire boats are impossible.

Conventionally, the fire boats owned by the Japan Coast Guard and the floating fire department have ordinary hulls equipped with water foam cannons and the like, making it impossible to enter the above-mentioned dangerous environment and carry out effective firefighting operations.

Furthermore, at sea where there is constant wind, the radiation range is significantly reduced, and the water nozzle on the turret is unstable due to the shaking of the ship due to the waves, and the radiation pattern is disordered. At present, extinguishing a fire on a tanker is considered extremely difficult.

It is an object of the present invention to provide a structure for a fire boat that can cope with the above-mentioned adverse conditions that conventional fire boats cannot cope with.

The present invention will be described in detail below based on the drawings.

FIG. 1 shows a front view of an embodiment of the present invention, and FIG. 2 shows a side view. In the figure, a hollow casing 2 with both ends V-shaped in the longitudinal direction of the back of a cylindrical tank 1 containing a fire extinguishing agent, which is below the water surface O, is welded as a draft part, and a machine cabin 3 is installed above it.
A plurality of strong iron arms 4, 4 with protrusions are made to protrude from both ends, and a hollow cylindrical buoyancy tank 5.5'' is fixed at the end of the arms through the same casing 2' as in 2 above, and a three-hull underwater hull is constructed. The buoyancy tank 5.5 is provided with at least two screw propellers 6.6 on the rear side or two screw thrusters 6.6 on the front side and protected by a duct 7.7.

The main fire-extinguishing water foam cannon 9, which automatically rotates and lifts up, is attached to the top of the turret 8, which extends and contracts to the forward position of about 10.10
are installed on the left, right, front and rear. In addition, high-power fire extinguishing foamers 11.11° will be installed on the front left and right sides of cabin 3, as well as on both sides. Additionally, a heat-resistant water spray nozzle (13113°) in the cabin was placed in the appropriate position to cover the exposed area above the water.

Although not shown, inside the machine cabin 3 are a tasel-driven fire extinguishing water pump, a marine engine, a generator, a fire extinguishing foam concentrate mixing device, a hydraulic pump, a compressor, and an electric valve.

It is equipped with a set of piping equipment, lighting, etc., and a control panel. It can be operated remotely and unmanned from land or from a mother ship, as well as manually operated by a man. For maneuvering the vessel, by using 2 to 4 6.6" screws with forward and reverse variable speed transmission, it is possible to turn at the same position on the hull, rotate at the minimum radius, and move forward and backward, making it convenient for aiming at the fire point and narrow places on the pier. It is.

The key to extinguishing a Yuta fire is to approach the fire source until it is within effective range and seal it all at once with foam, without leaving any burning parts. The existing foam cannons on fire boats are two in the class of 3,000 mph and have a tip range of about 60 meters in windless conditions. The higher the amount of radiation, the longer the range. Above sea level, there are plenty of water sources directly below. The foam expands to about 7 times the size of the solution using a fire extinguisher, but the foam stock solution requires 3%, and the thickness of the container is determined by the duration of the radiation rate.

It is possible to extinguish the fire by pouring 4 cubic meters of aqueous solution per minute per square meter of burning oil surface, but the effective injection rate is a problem, and for tankers, the rate is 6 to 12 cubic meters per minute.

The main gun's radiation amount per minute is 12,000, and the standing radiation duration is 20.
In terms of minutes, the amount of foam stock solution is 12000x0.03x20=
7,200 = 7.2 cubic meters, and if the diameter of the thick cylindrical container 1 of the stock solution tank is 1.2 meters, the length will be 6.5 meters, and the weight of the stock solution will be 8 to 8.5 tons. Become.

Among the foam stock solution proportional mixing methods, if the tank balance method is used, the stock solution is pushed out by water pressure and the inside of the tank is replaced with water.

Other mixed method prenosha pro bone yona set,
Even if a complete pump provocationer is used, water can be introduced into the tank using a check valve, so no air is allowed into the tank, so the total buoyancy hardly changes, only due to the difference in specific gravity between the raw solution and seawater. The waterline is always the same and the radiation sight is stable. It is used for the role of underwater stock solution tank 1.

Next, the gun produces 4 reaction forces when firing, and the above 12,000 per minute
In the vertical class, the gun barrel horizontal reaction force F is approximately 1000 kr.

If H is the height of the center of elevation of the barrel of the telescopic turret from the center of gravity of the entire ship, a moment of FH is generated. The reason for the 5.5" buoyancy tanks extending out on both sides was to provide sufficient restoring force if the gun barrel turned sideways in the direction of travel.

Compared to floating a wooden board horizontally on the surface of the water, if it is floating vertically, the waves will cause much less movement. In other words, the smaller the area in contact with the water surface, the less the influence of waves. In this case, the draft of the casing 2.2' is large and the cross section A is the only surface that comes into contact with the water, so the oscillation caused by waves is extremely small. This is the primary reason for the underwater three-barrel structure.

It is practical for the machine room to be above water for maintenance and inspection purposes. The tank 1 made of raw solution and steel pipes is the heaviest, so by providing it underwater, it serves as a drainage float. The total buoyancy that corresponds to the load on the water surface and the difference in weight of the steel material in the water is determined by the buoyancy tanks 5.5' on both sides and the hollow casings 2 and 2 of Mioka.
It forms an extremely stable semi-submersible hull structure with a wide width and a low center of gravity.

The submersible section has higher propulsion efficiency than a regular fireboat because of its strong wave-making resistance. Also, duct) 7.7' is the propeller screw 6.
61 as a hood while reducing vortex resistance and reducing the required horsepower by several percent.

The scraper 10 is used when the scale of the fire is small, as well as for spraying and stirring emulsifiers to make spilled oil incombustible, and for cooling the hull of a ship on fire with water spray.

The high magnification fire extinguishing foamer (high foamer) 11 has a magnification of 20 to 800, but since there is always wind at sea surface, it is 80 to 15.
In addition to self-defense extinguishing of large areas in the boat's path with 0x foam 12, it is also possible to efficiently cover unfired oil surfaces with foam for fire prevention.

Regarding the heat resistance of the hull equipment, self-defense water spray nozzles are recommended because there are few exposed parts above water. It is sufficient to wrap it in xi.

The explosion-proof device is said to be 4 to 8 meters above water.

The exhaust gas of the engine may be covered with water spray or an arrester may be attached, and the machine cabin may be made into a pressurized atmosphere.

Fuel oil is placed in the submersible tank section. A microcomputer is used in the control panel, 2 to 4 screws 6 and 6 are used to change the speed forward and reverse, and the operator can easily maneuver the ship from remote position 1 using a water sensor that keeps the ship still due to radial reaction force. When operated, it can be turned into a robot as an unmanned boat.

During normal times such as training, the ship will be able to be manned and operated manually. The remote control base point may be from land in the case of a tanker fire near a pier, but in the case of offshore fire, the remote control point is towed close to the mother ship and operated from the mother ship.

The above can be put to practical use by integrating existing technologies, and in the case of offshore operations, operators can operate visually since there is good visibility from upwind, and the installation of ITv equipment will further increase the sense of reality. Furthermore, by adding various advanced sensors, it can be developed into a highly autonomous robot firefighting column system.

To summarize the effects of this project based on the above structural functions, the catamaran type semi-submersible structure with the extinguishing agent tank as the submersible body provides wave motion stability, the constant draft does not disturb the fire extinguishing radiation pattern, which is the main function of a fire boat, and the small hull. be able to hold a large capacity of extinguishing agent. Because it absorbs and restores radiation reaction force, it can be loaded with large guns. The main feature is that it can practically and effectively solve the drawbacks of conventional fire boats, such as being heat-resistant and explosion-proof, without a crew, and being able to break through dangerous areas and approach fire vessels.

Small 1a, due to the coordinated operation of the propeller propulsion units on the front, rear, left and right sides of the underwater buoyancy tank! 1) Clear ship maneuvering is especially convenient for tankers berthed or ship fires in waterways. Since there is no wave-making resistance, the propulsion horsepower is also low. In addition, compared to conventional fire boats that have tanks mounted separately on the hull, manufacturing costs are reduced because the rigid tank body is used as a keel and is part of the hull.

Although this proposal can be used more safely and functionally as a manned boat, it can easily be put to practical use as a remote control base boat by an operator, and will serve as the basis for the development of a more advanced robot boat fleet system.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the proposed semi-submersible catamaran type fire boat, showing the main gun in a low position, and Fig. 2 is a side view showing the main gun in a high position and firing. Identical parts are designated by the same reference numerals throughout the figures.

Claims (1)

[Scope of Claims] 1. Features a structure in which a tank containing a fire extinguisher is placed in the center below the swimming surface and buoyancy tanks are lined up on both sides, and a hollow casing provided on each back allows drafting on the water surface, supporting only the machinery cabin above the water. A semi-submersible catamaran type fire boat. 2) A fire boat according to claim 1, which is provided with means for replacing the consumed amount of extinguishing agent in the tank with water. 3) A fire boat according to claim 1, wherein propellers are provided on the rear left and right sides of the twin-hulled buoyancy tank, or on the front and rear left and right sides. 4) The fire boat according to claim 1, which is provided with means for raising the pressure inside the cabin above atmospheric pressure. 5) The fire boat according to claim 1, which is provided with means for extending and contracting the turret of the fire cannon. 6. A fire boat according to claim 1, which is equipped with a fire-fighting high-foaming device with spherical spraying.