RU2707479C2 - Dynamic loads compensation device in tow line - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: invention relates to towing of objects, in particular, to devices that are part of tow line when towed to wake. Towing line includes towing synthetic rope, weighted weighting agent of design weight, consisting of interconnected halves with rifled chutes on inner surfaces, laying, winded on rope during assembly of weighting material, rods installed on one of halves on its outer cylindrical part. Presence of weighting agent increases efficiency of using synthetic rope in tow lines and provides for towing with its use at sea disturbance of up to 6 points.

EFFECT: supply of the tow line by the proposed weighting material ensures absence of parts moving and rubbing about the rope, as well as simplicity of installation of weighting material in any place of the towing cable.

1 cl, 7 dwg

Description

The device relates to the field of towing objects, in particular, to devices that are part of the towing line when towing into the wake.

A towing line is known, including a towing steel sling, in which a shock absorber made of a synthetic rope is integrated, see, for example, [1].

The use of such a towing line is limited to a score of 3-4 points.

A towing line is known, including a towing line made of a steel rope, on which several links of the anchor chain or a load with a roller are hung to increase its sag [2]. This towing line is used for marine towing, since with an increase in the load on the towing line, the latter rises, effectively extinguishing jerks of the dynamic load. However, it is practically impossible to realize the quick return of the towing line when transferring the towed object to another towing vehicle, especially in conditions of rapidly changing hydrometeorological conditions in the open sea.

Known towing line made of synthetic rope mounted on a rescue towing vessel of project 02980 [3]. The synthetic rope has a strength commensurate with the strength of a steel rope of the same diameter and several times lighter than the latter, which greatly facilitate the work with it, especially when feeding the tow line to the towed object.

At the same time, the synthetic rope, due to its low weight, is not able to “play” under load and almost immediately starts to break and transfers the increasing load to the termination point on the towed object, threatening its destruction in case of insufficient strength. The use of traditional links of the anchor chain or load with a roller to create a sag of a synthetic tow rope becomes unacceptable due to the high abrasion of the synthetic cable, which under the influence of the hooks of the anchor chain or load roller will literally burn under load

The objective of the invention is to increase the reliability of the towing line and improve the technology of working with it.

The problem is solved in that the towing line, including the synthetic towing rope, is equipped with a weighting device worn on the rope, consisting of halves connected to each other with threaded gutters on the inner surfaces and a gasket wound on the rope during weighting assembly, while on one of the halves on its outer the cylindrical part mounted butt.

The supply of the towing line with the proposed weighting material ensures the absence of moving and rubbing parts on the cable, as well as the ease of installation of the weighting compound anywhere in the towing cable. The presence of a weighting agent increases the efficiency of using a synthetic rope in tow lines and ensures the safe towing using a synthetic rope with sea waves up to 6 points.

In FIG. 1 shows the towline assembly.

In FIG. 2-5 shows the technology of assembly of the weighting agent and its placement on the towline.

In FIG. 6 shows the location of the tow rope in the weighting agent.

In FIG. 7 shows the descent of the towing rope with a weighting agent into the water.

The towing line consists of a towing synthetic rope 1, one end of which is fixed to the towing winch 2 of the towing 3, and the other to the towed object 4. On the towing rope 1, the weighting compound of design weight 5 is fixed, consisting of halves 6, in the center of which grooves 7 are cut. The halves 6 are connected by means of bolts 8 and nuts 9. On one of the halves there are 10 butts for lowering and lifting the weighting agent.

Installation of the towing line is carried out in the following sequence.

In accordance with the towing project, the length of the towing line is selected and its center is determined for optimal sag. On the deck of the tug 3 near the towing winch 2 on the cells 11 is installed weighting 5. Then it is disassembled. In the groove 7 of the lower half 6 of the weighting agent 5, a tow rope 1 is laid, wrapped in an elastic lining 12. Then, with the help of bolts 8 and nuts 9, the halves 6 are connected to each other. Weighting 5 assembled.

The installation technology of the weighting agent 5 involves the following actions (Fig. 7):

- using a ship crane 13, the weighting material 5 located on the deck is disassembled and assembled, laying the towing rope 1 in it so that the length of the formed running end 15 is equal to half the length of the towing line;

- the running end is transferred to the towed object 3 and pit it behind the stern of the towing vessel without tension;

- the weighting agent 5 is secured with slings 14 and a ship crane is carried out behind the stern of the towing vessel (positions I and II);

- the weighting agent is suspended behind the stern at the root end of the towing rope, which is achieved by the operation of the towing winch, which selects the root end of the towing rope, and simultaneously lowering the hook of the ship crane on which the weighting device is suspended;

- after the appearance of slack disconnect the slings 14;

- by the operation of the towing winch, the root end 16 of the towing rope 1 is extended until its length is equal to the length of the running end of the towing line.

Weighting is carried out in the reverse order.

The technical and economic advantage of the proposed towing line compared to the well-known towing line used on the rescue tug of project 02980 and adopted as a prototype is to increase the efficiency of using a synthetic rope in towing lines, to perform towing during sea waves up to 6 points.

Information sources:

1 Guide for towing ships, floating structures of the Navy. - M., 2009. - p. 51, 66, 68-69.

2 B.V. Bogdanov, M.K. Petrov. Marine towing, ed. "Sea transport". - M., 1955. - pp. 142-143.

3 Head multi-purpose rescue tug SB-121 of project 02980. Military-technical collection "Bastion", May 26, 2017

Claims (1)

A towing line including a towing synthetic rope, characterized in that it is equipped with a weighting material to be worn on the rope with an estimated weight consisting of halves connected to each other with threaded gutters on the inner surfaces, and a spacer wound on the rope during assembly of the weighting agent, while on one of halves mounted on its outer cylindrical part.

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