RU2487047C1 - Soft ship-rising pontoon - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed pontoon comprises inflatable cylindrical envelope, envelope blow system, pontoon suspension and towing assemblies, suspension system composed of slings enveloping the shell and fitted in guides mounted at envelope outer side, and crossbar. Suspension slings represents composite components. Crossbar is furnished with appliance to shorten lifting slings. Hand ropes are arranged at pontoon envelope.

EFFECT: higher efficiency of proposed pontoon.

7 dwg

Description

The invention relates to technical means of ship lifting, in particular to soft inflatable pontoons used when performing work on lifting sunken objects.

Known soft ship-lifting pontoon containing an inflatable cylindrical shell, a reinforcing belt extending along the contour of the shell in the diametrical plane, a purge system of the shell, nodes for lifting and towing the pontoon, a suspension system consisting of rods mounted on the reinforcement belt, and slings secured at one end in eyebrows and the other end in brackets, see, for example, the soft ship-lifting pontoon MSP-10, described in the Specialist's Handbook of the Navy, Moscow: Voenizdat, 1963, v. 4, pp. 132-135.

The disadvantage of this soft ship-lifting pontoon is the low reliability of the structure, especially the suspension system, associated with the uneven load on the slings that occurs when the pontoon is pointed. As a result of this, the eyebrows are pulled out of the gain belt and the pontoon breaks down.

Known soft ship-lifting pontoon containing an inflatable cylindrical shell, a purge system of the shell, the nodes of the lift and towing the pontoon, the suspension system, made in the form of slings, envelope the shell and embedded in the guides mounted on the outside of the shell, and the ends of the slings are connected together by a bracket and mounted on traverse, which is equipped with attachment points for lifting slings below, selected as a prototype, see, for example, soft ship-lifting pontoons from JWAutomarine (Great Britain), manufactured between arodnomu standard EN ISO 9001.2000 (www.jwautomarine.co.uk site).

The design of the pontoon suspension system provides, thanks to the traverse, a uniform load on the suspension slings, and the implementation of slings in the girth of the shell eliminates the need for eyebrows, which were the weak link of the MSP-10 pontoon.

However, despite the obvious advantages of the suspension system compared to the MSP-10 pontoon suspension system, it requires that the length of the lifting slings when the pontoon is pointed at the side of the sunken ship be determined with a high degree of accuracy, which is very difficult to implement in practice. In addition, due to the difference in the height of the sides of the various vessels to be lifted, the static relative position of the hull and the beam can not always allow the pontoon to be pulled off the side of the sunken ship to the required height to ensure that the ship is brought to the surface. All this reduces the efficiency of using soft ship-lifting pontoons.

The invention is aimed at improving the efficiency of using soft ship-lifting pontoons when lifting sunken objects.

The problem is solved in that in the well-known soft ship-lifting pontoon containing an inflatable cylindrical shell, a purge system of the shell, suspension and towing units of the pontoon, a suspension system made in the form of slings enveloping the shell and embedded in guides mounted on the outside of the shell, a crosshead, slings made by prefabricated, and the traverse is equipped with a device for shortening the lifting slings, made in the form of a guide and fixing pins, and the guide and one fixing pin are made stationary angles secured to the traverse, and a second locking pin - with the possibility of removable and fixed in one of the holes on the plate, and laid on the casing pontoons lifelines.

New significant features of the proposed device are:

- the implementation of slings suspension teams;

- supply of the traverse with a device for shortening lifting slings.

The implementation of the suspension slings by prefabricated allows you to change the distance between the shell and the traverse, and providing the yoke of the soft ship-lifting pontoon with a device for shortening the lifting slings provides a predetermined height of the pontoon at the side of the sunken object, which ultimately increases the efficiency of using the proposed soft ship-lifting pontoon.

Figure 1 shows a soft ship-lifting pontoon in a perspective view.

Figure 2 shows a soft ship-lifting pontoon in front view.

Figure 3 shows a soft ship-lifting pontoon in a top view.

Figure 4 shows a soft ship-lifting pontoon in side view.

Figure 5 shows the traverse of the soft lifting jack of the pontoon in a perspective view with a fixed lifting sling.

Figure 6 shows the crosshead of the soft lifting pontoon in side view with fixed lifting slings.

Figure 7 shows the installation of soft ship-lifting pontoons at the sides of the sunken object.

The soft ship-lifting pontoon (Fig. 1) contains an inflatable soft shell 1, lifting rods 2, a purge system consisting of a small etching valve 3 and a blowing nozzle 4. On top of the shell 1 are guides 5 in which slings 6 of constant length are missing, connected by brackets 7 with slings 8 of variable length. The latter, using brackets 9, are attached to the crosshead 10, on which lifting slings 11 are attached when the pontoon is operating. Holding straps 12 are connected to the crosshead 10 at its ends, connecting the crosshead with towing rods 13 located at the ends of the shell 1. For the convenience of working with the pontoon from above and rails 14 are laid at the bottom of the shell. In the lower part of the shell (FIG. 2), blower fittings 4 and blasting valves 15 are also installed.

The traverse 10 comprises a housing 16, on the horizontal shelf 17 of which the assemblies 18 of fixing the brackets 9 to the traverse are mounted. The housing 16 is equipped with a device for shortening the lifting slings 11. The device for shortening the lifting slings is made in the form of a fixed guide pin 19, a movable locking pin 20 installed in the holes 21 on the crosshead housing. In the process of shortening the sling, its ogon 22 is put on a fixed fixing pin 23. To prevent the lifting sling from sliding off the pins during operation of the pontoon, the crosshead is equipped with slings 24.

Soft lifting pontoon is used as follows (Fig.7). Before sharpening a soft ship-lifting pontoon, one of the known methods involves pulling the lifting slings 11 under the hull of the sunken object 25 and carrying out their conductors on board the supply vessel.

At the same time, soft ship-lifting pontoons are prepared for work on board the supporting vessel. For this, slings 8 are connected to the slings 6, the length of which is determined by the position of the pontoons at the sides of the sunken object according to the lifting project. Blowdown hoses are connected to the fittings 4, and drain slings are connected to the lifting eyes 2. Using the conductors of the lifting slings as guides, the soft ship-lifting pontoons are lowered to the depth to the side of the sunken object, where the diver leads the lifting sling into the device for shortening the slings of the yoke 10, passing it along the pins 19 and 20 and securing the ogon 22 of the lifting sling in the pin 23. Then secures the straps 24 on the traverse to prevent the lifting strap from slipping off the pins.

The diver performs similar actions to install a soft ship-lifting pontoon on the other side of the sunken object.

Then, partial blowing of soft ship-lifting pontoons via purge hoses is performed. When this occurs, the hood lifting slings 11.

After the diver makes sure that the slings are fully extended, he releases air from the shell 1 of the pontoon using etching valves 3. Thereby, the load on the lifting slings 11 is removed. Then, by moving the pin 20 along the yoke and securing it in one of the holes 21 on the yoke, the diver selects the slack in the lifting sling 11 and shortens it. Pontoon is ready to go.

A complete purge of all sharpened soft ship-lifting pontoons and the ascent of the sunken object to the surface is carried out.

The technical and economic advantage of the proposed soft ship-lifting pontoon compared to the well-known soft pontoon of J.W. Automarine (Great Britain), adopted as a prototype, is to increase the efficiency of using soft ship-lifting pontoons when lifting sunken objects.

The required investment for the development and manufacture of the proposed soft ship-lifting pontoon is about 350 thousand rubles. Currently, a preliminary design for the construction of a soft ship-lifting pontoon has been completed.

Claims (1)

A soft ship-lifting pontoon containing an inflatable cylindrical shell, a purge shell system, lifting and towing units of the pontoon, a suspension system made in the form of slings enveloping the shell and embedded in guides mounted on the outside of the shell, a crosshead, characterized in that the slings are prefabricated, and the traverse is equipped with a device for shortening the lifting slings, made in the form of a guide and fixing pins, and the guide and one fixing pins are made stationary mounted and on the traverse and the second locking pin - with the possibility of removable and fixed in one of the holes on the plate, on a rail laid pontoon hull.

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