RU125548U1 - SHIPBOARD FOR LAUNCHING AND LIFTING UNDERWATER VEHICLES - Google Patents

Abstract

Ship device for launching and lifting underwater vehicles, including a through shaft in the ship's hull and lifting equipment located on the deck, characterized in that the lower part of the shaft has a bell with conical generators, into which a reciprocal socket is inserted through the sealing sleeve with a removable plug-cap connected by cables with lifting equipment, designed for launching and lifting underwater vehicles through the shaft, as well as isolating the shaft cavity from the aquatic environment and ice formations.

Description

The utility model relates to the field of shipbuilding, and more specifically to carrier vessels of underwater vehicles and solves the problem of increasing the efficiency of carrying out offshore descent / lifting operations of underwater vehicles (PA) by a carrier vessel.

Currently, various types of PA are widely used for underwater technical work, research of the World Ocean, rescue operations, etc.

The effective use of PA depends largely on the availability of special launching devices on the carrier vessel that ensure safe launching and lifting operations in the open sea.

Sometimes for this purpose general cargo devices (cranes, arrows, portals) are used, however, this is due to severe restrictions on weather conditions.

The design of the currently used special hoisting devices (SPU) depends on the features of the PA: the design and strength of the hull, shape, size and weight; design of attachment points; service features (in particular, the possibility of PA team exit during tripping operations is taken into account). There are also restrictions on weather conditions in this case, as a rule: wind up to 14 m / s, excitement with a height of not more than 5 m. When the weather conditions worsen, work stops due to an increase in the probability of PA loss.

A device for performing tripping operations PA, including ship lifting equipment (cargo boom). The connection of the PA with the ropes of the ship's cargo boom is carried out in the form of a remotely controlled grip that allows the cable to be disconnected during the descent of the PA. During the descent and ascent of the PA for one point of the suspension, its rotation is possible, which is limited by guy ropes wound to the ends of the PA and manually “possessed” by the crew of the vessel (Figs. 1, 2). (Information from the official website of the P.P. Shirshov Institute of Oceanology, RAS, subsection Marine Engineering and Marine Equipment "Marine Engineering", www.ocean.ru) - prototype.

PA hoisting operations begin with the positioning of the carrier vessel at the site of underwater operations using anchors or a dynamic positioning system. During the descent operation to the PA, the rope of the ship’s lifting equipment and guy ropes are fixed, after which the PA rises from the keel blocks above the deck of the carrier vessel and moves overboard. Its correct position is controlled by guy wires. After the descent of the PA to the sea surface, the cables are disconnected using remotely controlled grips, after which the PA begins to dive. Regardless of the use of remotely controlled captures, before carrying out the descent operations, the working boat with a scuba diver descends, ensuring the safety of the work.

Raising the PA is carried out in the reverse order, but takes a little longer, since it involves additional operations: surfacing the PA to the surface of the sea, detecting the PA by the carrier vessel using visual and location-based surveillance tools, approaching the ship to the PA, launching a scuba diver, towing PA to the carrier ship, securing the cargo cable and guy scuba divers. After that, the PA is lifted to the deck of the vessel using ship lifting equipment, where the PA is mounted on kilblocks or a trolley.

A known device for performing tripping operations requires a boat with a scuba diver fastening the cables. Tripping operations significantly depend on weather conditions, at the deterioration of which their implementation becomes more complicated or impossible, which in turn leads to significant interruptions in work.

When raising and lowering the PA from the carrier vessel, there is a significant probability of a PA hit on the side of the vessel, which may lead to damage to the PA hull and equipment failure.

The objective of the proposed utility model is to increase the efficiency of PA hoisting operations by reducing the time of auxiliary work, using the proposed device for any type of underwater vehicles (taking into account the dimensions of the mine), increasing the safety of hoisting operations with PA, and also isolating the cavity of the mine from the water environment and ice formations.

To achieve this, in a known ship’s device for launching and lifting underwater vehicles, including a through shaft in the ship’s hull, and cargo equipment located on deck, according to a useful model, the lower part of the shaft has a bell with conical generators, into which a removable platform is inserted through the sealing collar - a plug connected by cables with lifting equipment, designed for lowering and lifting underwater vehicles through the shaft, as well as isolating the cavity of the shaft from the water and ice development.

The execution of the lower part of the shaft in the form of a socket covered by a retractable dummy platform used for lowering / raising PA allows to increase the productivity of these operations by reducing the negative impact of adverse weather conditions and reducing the volume of manual operations.

In the conditions of ice-covered water area, the descent / ascent of PA through the shaft equipped in the hull of the carrier vessel, using the platform cover, excludes the interaction of PA with ice floating on the sea surface and is the safest way to carry out this type of operation.

The presence of the stub platform provides a decrease in resistance to the movement of the vessel compared to an open shaft, and also eliminates the penetration of broken ice into the shaft when the vessel moves in ice.

The essence of the proposed utility model is illustrated by drawings, where Fig. 3 schematically shows a general view of the proposed ship device for lowering and lifting underwater vehicles (cover-cap in the upper position), Fig. 4 schematically shows a cross-section A-A of the carrier vessel in the region figure 4 (with the cap-plug in the lower position).

The ship device for launching and lifting the PA includes a through shaft 1, made inside the ship's hull, and lifting equipment 3 located on deck 2 (Figs. 3, 4). In the lower part of the shaft 1 there is a bell 4 with conical generators, into which a reciprocal socket is inserted through the sealing sleeve 5, a removable plug platform 6 connected by cables 7 to the lifting equipment 3, which is designed to lower and raise the PA 8. A cargo winch is installed above the shaft 1 9 for, providing the possibility of moving the PA 8 to the deck level of the vessel 2 and lowering it onto the stub platform 6 (Figs. 3, 4).

The descent and ascent of the PA by the carrier vessel using the proposed device is as follows.

The carrier vessel (not shown in the figure) is drifted or positioned at the site of underwater operations, while shaft 1 is drained, and PA 8 is located on the dummy platform 6, which is pressed by hydrostatic pressure to the conical socket 4 of shaft 1. When ready underwater vehicle 8 to the descent, the mine 1 is flooded through kingstones (not shown) with water to sea level, as a result of which the water pressure is equalized to the dummy platform 6 outside the vessel and from the mine side 1. After that, the dummy platform 6 with PA 8 having negative buoyancy, falls below the bottom of the vessel 10, and the speed of its immersion is limited by the speed of etching of the cables 7. The descent platform 6 is lowered to a predetermined depth, at which it stops. Then PA 8 under the influence of its propulsion moves to the place of underwater work.

The rise of PA 8 is carried out in the reverse order. The underwater vehicle enters the space under the shaft 1 above the stub platform 6 and lowers to its surface. Together with PA 8, the dummy platform 6 rises to the vessel with the help of ropes, before the dummy platform 6 is put in its place in the socket 4 of the bottom of the shaft 1 and seals the cavity of the shaft 1 through the sealing sleeve 5 using pumps (not shown in the figure) water is pumped out of the shaft 1 and the platform cover 6 is pressed hydrostatically to the conical socket 4. In the drained shaft 1, the PA 8 can be inspected, serviced and prepared for the next dive. At the end of underwater operations, the carrier vessel is removed from the positioning point and proceeds to the next place of underwater operations.

The proposed ship device for launching and lifting underwater vehicles allows minimizing the number of manual operations, eliminating the need to use a working boat during launching / lifting the PA, reducing the impact of hydrometeorological conditions, ensuring safe tripping in ice conditions, reducing the risk of damage to the underwater vehicle and injury crew, to carry out tripping operations of any type of underwater vehicles (taking into account the dimensions of the mine), reduce hydrodynamic resistance of the ship and the likelihood of falling ice formations in the mine when performing underwater engineering operations in ice conditions, that distinguishes it from the prototype.

Claims (1)

Ship device for launching and lifting underwater vehicles, including a through shaft in the ship's hull and lifting equipment located on the deck, characterized in that the lower part of the shaft has a bell with conical generators, into which a reciprocal socket is inserted through the sealing sleeve with a removable plug-cap connected by cables with lifting equipment, designed for launching and lifting underwater vehicles through the shaft, as well as isolating the shaft cavity from the aquatic environment and ice formations.

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