RU155963U1 - FOLDING SHIPBOARD DEVICE FOR PROVIDING TOWING THE ICE-BREAKING TOWERS OF ICE-BREAKERS IN ICE CONDITIONS - Google Patents

Abstract

Foldable ship device for towing icebreaker vessels in ice conditions, characterized in that it is located in the aft part of the icebreaker and contains: - aft stop connected to the towing winch, which lifts it through the rollers with the help of the hoisting cables; - swivel rods with transmission of rotation from the gears, which, when lifting the aft stop, work to create additional forces with constant tension of the lifting cables to protect against the influence of possible jerks and ensure less load on the towing winch; - auxiliary cables connected to the towing winch, providing additional fixation of the feed stop in folded form; - movable rollers mounted on the feed stop, providing auxiliary cables with optimal positions during folding of the feed stop; - paired rollers providing constant tension of the auxiliary cables to prevent the feed stop from tipping over; - gutters inserted into the guides, providing tight grip, preventing e displacement of the feed support to the side from the effects of various loads.

Description

The utility model relates to maritime transport, and more specifically to ice navigation with the help of towed icebreakers (ice class vessels, icebreakers, tugboats, vessels for towing special means), and solves the problems of increasing the efficiency and safety of marine operations with an icebreaker in ice conditions.

Given the vast expanses of Russia, where often only sea transportation of goods is possible, as well as in connection with the development of oil and gas fields in the north of the country, there is a need for sea transportation of goods, for example, from mini-oil plants and drilling rigs. The harsh climatic conditions of the north of Russia impose additional requirements for the transport of goods, namely in ice conditions. In ice conditions, a self-propelled vessel often cannot move independently. This may be due to both severe ice conditions and the unsatisfactory technical condition of the vessel itself. Therefore, for transportation and delivery of goods to the final destination, there is a need for towing a vessel with cargo in water areas with ice cover of the Arctic seas.

Currently, for piloting vessels in ice conditions, an important circumstance of safe movement is the preservation of distances between all vessels, which allow each vessel to stop, avoiding collision with the vessel in front when the icebreaker unexpectedly stops due to severe ice conditions. As the vessels move behind the icebreaker as they move away from it, the channel it breaks through becomes narrower and gradually closes completely with ice. Therefore, when the vessels move at a certain distance from each other, the rear vessels experience more and more frequent impacts on ice floes and are forced to reduce their speed to avoid getting holes. The decrease in the speed of the caravan of vessels leads to the fact that they begin to get stuck in ice, which often leads to a stop of the entire caravan and freezing of individual vessels into the ice. This requires the icebreaker to return to the jammed vessels, which significantly reduces the speed of ice navigation of all vessels.

The closest technical solution to the proposed utility model is a device for transporting goods in ice conditions (invention of the Russian Federation No. 2462386, A.M. Medvedev, VM Komov Complex for transporting goods in ice conditions, 2012) - a prototype.

The disadvantages of this prototype are:

- the presence of a catamaran vessel with an ice belt;

- a special form of the bow of the hull;

- towing method - pushing ahead of the vessel;

- the presence of a towing device in the bow of the towing vessel;

- low strength and reliability of the design of the complex;

- a large number of manual operations during ship towing;

- significant time spent on maintenance;

- the need for complex preparatory operations.

The objectives of the proposed utility model are: ensuring towing of vessels by the icebreaker in waters with ice cover of the Arctic seas in any ice situation, increasing the efficiency of operation of the folding device for transporting ships in ice conditions due to operational reliability, durability of the device and ensuring the transportation of ships in the Arctic seas with non-standard, heavy and bulky goods.

When carrying out operations of towing vessels with an icebreaker, it is possible to reduce its length by turning the aft stop onto the aft deck, which significantly increases the maneuverability of the icebreaker.

The problem is solved through the use of the proposed utility model - a folding ship device, in which rotary thrusts together with a system of rollers and cables connected to the cargo winch create optimal traction forces for lifting the aft stop.

The essence of the utility model is illustrated by drawings, which present: a general view of the proposed folding device (Fig. 1), its top view (Fig. 2) and the principle of its operation when towing ships (Fig. 3 ÷ 5). The design of the folding ship device has two identical mechanisms for lifting the stern support, located symmetrically with respect to the diametrical plane of the icebreaker.

The presented figures (Fig. 1 ÷ 5) show the structural components of a folding ship device:

1 - aft emphasis; 8 - special guide; 2 - roller; 9 - auxiliary cable; 3 - a gear wheel; 10 - a special pipe; 4 - electric motor; 11 - base; 5 - rotary thrust; 12 - movable roller; 6 - a lifting cable; 13 - twin rollers. 7 - trough;

The main structural element of the collapsible ship device for towing icebreaker vessels in ice conditions is the stern support (Fig. 1) located in the stern of the icebreaker. The vessel’s towing winch (not shown in the figure) with the help of the lifting cables connected to it raises the stern support through the rollers to the folded position. Additionally, the feed support with gears connected to electric motors rises by turning rods by an angle α equal to 45 ° (Fig. 3) to the working position with the tension of the lifting cables. Turning rods when raising the aft stop work to create additional efforts with a constant tension of the lifting cables to protect against the influence of possible jerks and in general - to provide less load on the towing winch.

The rollers provide the position of the lifting cables from the towing winch to the swing rods in a horizontal position. The feed stop has gutters on the contact surface with the hull of the vessel, which, in the unfolded position of the feed stop, are inserted into special guides that create a tight grip and prevent the feed stop from moving away from various loads.

The rigid position in the folded form to the feed stop is provided by gears with transmission of moments from electric motors, which also work on the lifting of rotary rods.

For additional fixation of the feed stop when folded, use auxiliary cables connected to the same towing winch as the lifting cables, which pass through special pipes and the base and are parallel to the lifting cables. This positively affects the compactness of the entire folding ship device and ensures that the deck of the ship is not cluttered. Auxiliary cables are attached to the aft emphasis through movable rollers, which provide rotation of the auxiliary cables to the optimal positions during folding / unfolding of the aft emphasis. The twin rollers through which the auxiliary cables pass ensure constant tension of the auxiliary cable to prevent the feed stop from tipping over under its gravity and provide additional fixation forces to the feed stop, preventing the installation from shifting from sharply changing weather conditions or other forces arising.

Thus, as a result of applying the proposed design of a folding ship device to ensure towing by an icebreaker of ships in ice conditions, a new technical result is achieved:

- improving the efficiency of its operation by ensuring the operational reliability and strength of the complex;

- reducing the overall length of the towing icebreaking vessel by folding the stern support with a folding device that allows the vessel to maneuver in narrow places of operation and provide the ability to tow any type of vessel, taking into account the compactness of the folding device;

- the ability to carry out operations of folding and unfolding the feed support using remote control, which ensures the safety of towing operations on the high seas due to the minimum direct participation of a person in them.

In addition to these advantages, it should be noted that the proposed device can be used in any ice environment of the Arctic seas for towing vessels, which compares it favorably with the prototype.

Claims (1)

Foldable ship device for towing vessels by icebreaker in ice conditions, characterized in that it is located in the stern of the icebreaker and contains: - aft emphasis connected to the towing winch, which with the help of the lifting cables brought to it lifts it through the rollers to the folded position; - swivel rods with transmission of rotation from the gears, which, when raising the aft stop, work to create additional forces with constant tension of the lifting cables to protect against the influence of possible jerks and provide less load on the towing winch; - auxiliary cables connected to the towing winch, providing additional fixation of the feed stop when folded; - movable rollers mounted on the feed stop, providing auxiliary cables optimal positions in the process of folding the feed stop; - twin rollers providing constant tension of auxiliary cables to prevent tipping of the feed support; - gutters inserted in the guides, providing a rigid grip, preventing the movement of the feed stop to the side from the effects of various loads.

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