RU2630871C1 - Closed-type lifeboat for evacuation and saving of personnel of marine oil and gas platforms, transport and technological ships in ice conditions - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: closed-type lifeboat is proposed, the hull bow of which has two stems, spaced apart, interconnected in the upper hull part along a curvilinear generatrix and having an inclination forward from the bottom to the top, and in the lower part - connected with the bottom lifeboat surface, forming a recess in the front part of its hull, the propulsion system is executed in the form of rotor-propeller propulsors installed at each board, the fire protection system is represented by a system of nozzles distributed along the external perimeter of the external lifeboat surface to form a thermally insulating protective gas curtain, which are connected via a main to a source of a high-pressure inert gas, located in the lifeboat hull.

EFFECT: increasing the reliability and safety of the boat in emergency situations.

2 cl, 3 dwg

Description

The invention relates to the field of shipbuilding and relates to the issue of ensuring the evacuation and rescue of personnel of offshore platforms and crews of transport and technological vessels operating in the Arctic and Far Eastern freezing seas using lifeboats as emergency evacuation and rescue equipment.

A well-known motor tanker lifeboat with a boat fire protection system containing pipelines for taking outboard water, slotted nozzles on the boat body to create thin jets directed at an angle to the protected surface of the boat body, propulsion system in the form of a propeller and an air system (copyright certificate No. 201926 dated 11/13/1967 "Motor tanker lifeboat") - prototype.

However, the use of the well-known lifeboat in ice conditions at low temperatures, when the water can freeze, is not possible, since it is designed to evacuate the crew only in clean water (without ice fragments) and its propulsion system in the form of a propulsion unit with a propeller does not provide an opportunity exit of the lifeboat with the crew from the water to the ice surface and continued movement of the lifeboat on ice.

In addition, the fire protection system does not provide sufficient safety during passage with the rescued personnel of the fire zone and high temperatures in emergency situations and fires in arctic conditions.

The objective of the invention is to ensure reliable movement of the boat on the water surface with ice fragments, exit the boat out of the water with ice fragments on the ice surface and subsequent movement on it, as well as fire safety of personnel saved on the boat during the passage of the fire zone and high temperatures in emergency situations and fires in arctic conditions.

To solve this problem, a closed lifeboat for the evacuation and rescue of personnel of offshore oil and gas platforms, transport and technological vessels in ice conditions, with a hull to accommodate the rescued personnel, a propulsion system and fire protection system, according to the invention, the bow of the lifeboat has two spaced apart from a pin, which are interconnected in the upper part of the body along a curved generatrix of an arcuate shape and have an inclination forward in the direction from below top, and in the lower part - with the bottom surface of the boat with the formation of a recess in the front of its hull. Outside, the pins are mated to the surface of the sides. In this case, the propulsion system of the boat is made in the form of outboard mounted rotor-propulsion propellers. Moreover, the fire protection system of the lifeboat is a system of nozzles distributed around the perimeter of its outer surface that ensures the formation of a protective gas insulating curtain on and above the surface of the boat, which are connected by an inert gas high-pressure source located in the boat’s hull, as well as the bow tip of the boat two spaced apart pins, which are interconnected in the upper part of the body along a curved arc-shaped generatrix shaped and have an inclination forward in the direction from the bottom up with the formation in the front of the boat of the recess, mating with the pins having the form of a slide, and the bottom surface of the boat, and the execution of propulsors in the form of rotor-screw propulsors provides the boat out of the water on the ice surface, which installed with the possibility of their shift along the axis in the aft direction and changes in their angle of inclination to the horizon.

The introduction of the nozzle system distributed along the perimeter of its outer surface into the fire protection system ensures the formation of an inert gas protective thermally insulating shirt (thermal curtain) on and above the boat surface, and provides reliable protection of the boat hull surface and, accordingly, personnel from high temperatures in case of fire.

The essence of the invention is illustrated by drawings, where in FIG. 1 is a schematic (in isometric view) general view of a closed lifeboat for the evacuation and rescue of personnel of offshore oil and gas platforms, transport and technological vessels in ice conditions; in FIG. 2 is a side view of the lifeboat of FIG. one; in FIG. 3 is a view of a lifeboat with an explanation of the type of thermal curtain of inert gas.

The lifeboat has a hull 1, a propulsion system in the form of outboard mounted rotary screw propellers 2 and a fire protection system consisting of a system of nozzles 3 located around the perimeter of the lifeboat, inert gas overpressure cylinders (not shown) located in the boat's hull and connected with nozzles 3 main pipelines (not shown). The bow of the boat is formed by two pins 4 (Fig. 1, 3), spaced from each other and mated to each other in the upper part of the hull along a curved generatrix of an arcuate shape 5, while the pins have a forward inclination from the bottom up to form a recess 6 in the hull , on the surface of which the pins 4 are mated in the upper part of the hull 1, and the surface of which smoothly mates with the bottom surface of the boat's hull (Figs. 1, 3), and outside the pins are mated with the side surface of the sides of the boat. The propulsion system of the lifeboat is made in the form of outboard mounted rotor-screw propulsion devices 2 (Figs. 1-3), which are capable of shifting along the axis in the aft direction and changing the angle of inclination to the horizon.

The evacuation and rescue of personnel of offshore oil and gas platforms, transport and technological vessels using the proposed boat is as follows.

In the event of an emergency at an offshore facility (for example, a fire or explosion), personnel are evacuated and placed in a lifeboat, which is then lowered into clean water or water with ice fragments on the cables of the launching device installed on the emergency rescue deck. To protect the boat with personnel from exposure to high temperatures of open fire, a fire protection system is activated by opening inert gas elevated pressure cylinders located in the boat’s hull, from which inert gas flows to the nozzles 3 located around the perimeter of the lifeboat. The inert gas coming from the nozzles 3 ensures the formation on and above the surface of the boat of a protective thermally insulating shirt (thermal curtain) 7 of inert gas that isolates the boat from the negative effects of fire. After disconnecting the boat from the cables, it, under the action of rotor-screw propulsors 2, moves to a safe distance from the emergency marine object.

When approaching the boat with the personnel to the edge of the ice field, it is under the action of rotor-screw propellers 2 and due to the presence in its bow of two pins 4 having a curved generatrix of an arcuate shape 5 and an inclination forward, as well as a recess 6 formed between them in its hull 1, begins to exit the water with fragments of ice on the ice surface. After the boat exits to the ice surface, it continues to move along it due to the operation of the same rotor-propeller propellers 2 to a safe distance from the emergency marine object.

Thus, the enclosed lifeboat proposed for the application for the evacuation and rescue of personnel of offshore oil and gas platforms, transport and technological vessels in ice conditions provides for reliable movement along the water surface with ice fragments, effective exit from water with ice fragments on the ice surface and subsequent movement along it, as well as the fire safety of the rescued personnel during the passage of the fire zone and high temperatures during emergency situations and fires in the Arctic loviyah.

Claims (2)

1. Closed lifeboat for the evacuation and rescue of personnel of offshore oil and gas platforms, transport and technological vessels in ice conditions, having a hull for accommodating the rescued personnel, a propulsion system and fire protection system, characterized in that the bow of the lifeboat has two spaced apart other pins, which are interconnected in the upper part of the body along a curved generatrix of an arcuate shape and have an inclination forward in the direction from the bottom up, and in the lower part - with the bottom surface of the boat with the formation of a recess in the front of its hull, while the outside pins are mated with the surface of the sides, while the propulsion system of the boat is made in the form of outboard mounted rotor-screw propulsors, and the fire protection system of the lifeboat is distributed around its perimeter the outer surface is a system of nozzles that ensure the formation on and above the surface of the boat of a protective gas thermally insulating curtain, which are connected by a highway to the source along high inert gas pressure located in the boat's hull. 2. A lifeboat according to claim 1, characterized in that the rotor-propeller thrusters are mounted so that they can be shifted along the axis in the aft direction and their angle of inclination changed to the horizontal.

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