CN112081451B

CN112081451B - Automatic steel wire rope releasing device

Info

Publication number: CN112081451B
Application number: CN202010712497.5A
Authority: CN
Inventors: 刘建峰; 王彦多; 孙道青; 杜颖; 代万宝; 李晓明; 高绍涛; 赵强; 张健
Original assignee: Offshore Oil Engineering Co Ltd
Current assignee: Cnooc Shenzhen Ocean Engineering Technology Service Co ltd; Offshore Oil Engineering Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-08-31
Anticipated expiration: 2040-07-22
Also published as: CN112081451A

Abstract

The invention discloses an automatic releasing device for a steel wire rope, which successfully solves the problem that the steel wire rope exerts reverse force on a tug during dragging and releasing of a conduit frame, and greatly reduces the construction risk and the construction difficulty during dragging and releasing of the conduit frame.

Description

Automatic steel wire rope releasing device

Technical Field

The invention relates to the field of ocean engineering platform dismantling, in particular to an automatic steel wire rope releasing device.

Background

When the tall structure is dragged and fallen down on the land, the steel wire rope for falling down is finally changed into a loose state from a tensioned state in the whole falling process of the tall structure, so the steel wire rope and dragging equipment are generally not damaged in the whole falling process.

When putting down the abandoning jacket, the wire rope between tow boat and the jacket, if adopt conventional connection fixed mode, can appear being dragged after putting down by the tow boat in the jacket, because the inertia effect of jacket and the influence of the depth of water can exert huge reverse pulling force to wire rope and tow boat, probably can cause the risk that wire rope breaks or the tow boat topples.

In addition, if the steel wire rope cannot be automatically released in the dragging and falling process of the jacket, a diver or an ROV is required to perform underwater tripping on the steel wire rope in the later period, and the construction difficulty and the construction cost of a project can be increased.

Disclosure of Invention

The invention provides an automatic unhooking device for a steel wire rope, which can realize automatic unhooking between the steel wire rope and a jacket when the jacket is laid down in situ, and improve the safety of construction.

In order to solve the technical problem, the invention provides an automatic steel wire rope releasing device which comprises a limiting column, a first buoy, a second buoy and a steel wire rope, wherein one end of the limiting column is fixed on the inner side of a horizontal support rod, the limiting column is perpendicular to the horizontal support rod, one end of the steel wire rope is connected with a tug, the other end of the steel wire rope is a lute head sleeved on the limiting column, the second buoy is arranged on the lute head, and the first buoy is arranged between the lute head and the connecting position of the steel wire rope and the tug.

Further, the distance between the first buoy and the lute head is 3m-5 m.

Further, the side wall of the first buoy is fixedly connected with the steel wire rope.

Furthermore, the second buoy is connected with the lute head through a binding rope.

Furthermore, an included angle between the steel wire rope and the limiting column is alpha, and when the alpha is larger than 90 degrees, the lute head is released from the limiting column.

The invention has the technical effects that: the invention aims at the characteristic that in the process of turning the conduit frame from vertical to horizontal, the limiting column horizontally welded on the conduit frame can be turned from horizontal to vertical, and the float bowl can provide vertical upward buoyancy after entering water, and the buoyancy can drive the lute head of the steel wire rope to slide on the limiting column, successfully solves the problem that the steel wire rope exerts reverse force on the tug during the dragging and turning process of the conduit frame, and greatly reduces the construction risk and the construction difficulty in the dragging and turning process of the conduit frame.

Drawings

Fig. 1 is a schematic view of an automatic disengaging device in a preferred embodiment of the invention (tugs are not towing).

Fig. 2 is a schematic diagram of an automatic releasing device in a preferred embodiment of the invention (the tug is dragged, and the lute head is not released from the limiting column yet).

Fig. 3 is a schematic diagram of an automatic releasing device in a preferred embodiment of the invention (the lute head is released and the jacket is not landed yet).

Fig. 4 is a schematic diagram of an automatic releasing device (lute head jacket floor) in a preferred embodiment of the invention.

FIG. 5 is a front view of a preferred embodiment of the present invention (tug not being towed).

Fig. 6 is a front view of a preferred embodiment of the invention (tug towed, wire rope not disengaged).

Fig. 7 is a perspective view of a preferred embodiment of the present invention.

Reference numerals: underwater steel pile-3; jacket-4; a tug-6; a steel wire rope-7; a first buoy-8; a limiting column-9; a horizontal stay bar-11; lute head-12; a second buoy-13; a binding rope-14.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

The embodiment of the invention discloses an automatic steel wire rope releasing device which comprises a limiting column 9, a first buoy 8, a second buoy 13 and a steel wire rope 7, wherein one end of the limiting column 9 is fixed on the inner side of a horizontal stay bar 11, the limiting column 9 is perpendicular to the horizontal stay bar 11, one end of the steel wire rope 7 is connected with a tug 6, the other end of the steel wire rope is a lute head 12 sleeved on the limiting column 9, the lute head 12 is provided with the second buoy 13, and the first buoy 8 is arranged between the lute head 12 and the joint of the steel wire rope 7 and the tug 6.

In this embodiment, the distance between the first buoy 8 and the lute head 12 is 3m-5 m. The first buoy 8 is in the range of 3m-5m, and the automatic releasing effect is best.

In this embodiment, the side wall of the first buoy 8 is fixedly connected with the steel wire rope 7.

In this embodiment, the second buoy 13 and the lute head 12 are connected by a binding rope 14.

In this embodiment, an included angle between the steel wire rope 7 and the limiting column 9 is α, and when α is greater than 90 °, the lute head 12 is released from the limiting column 9.

In this embodiment, the top of the jacket is provided with horizontal struts 11, and when the jacket 4 is laid down, the horizontal struts 11 are pulled transversely by the utility tug 6.

In this embodiment, lute head 12 is a rope loop formed by bending and knotting the other end of steel wire rope 7, and the rope loop is looped over limiting column 9, so as to realize the sleeve connection between lute head 12 and limiting column 9.

In this embodiment, before the jacket 4 is pulled and laid down, the horizontal brace 11 at the cabled walkway is welded with the limit column 9, then one end of the steel wire rope 7 is connected with the tug 6, the lute head 12 at the other end of the steel wire rope 7 is sleeved on the limit column 9, and the buoy is bound.

In this embodiment, in the process that the tug 6 pulls and lays down the jacket 4, the jacket 4 is changed from the vertical type to the horizontal type, and the horizontally welded limiting column 9 is changed from the horizontal type to the vertical type. As shown in fig. 6, when the included angle α between the steel wire rope 7 and the limiting column 9 is less than or equal to 90 °, the buoy can provide a vertical upward buoyancy after entering water, and when the comprehensive buoyancy of the first buoy 8 and the second buoy 13 is greater than the friction force between the lute head 12 of the steel wire rope 7 and the limiting column 9, the buoy can drive the lute head 12 of the steel wire rope 7 to slide upward on the limiting column 9 until the lute head 12 is completely detached from the limiting column 9, so that the jacket 4 continues to sink due to inertia, and the steel wire rope 7 and the lute head 12 float on the sea level under the effect of the buoyancy.

In order to realize the automatic release of the steel wire rope 7 during the dragging and falling process of the jacket 4, the following steps are carried out.

As shown in fig. 1, a scaffold is erected on the horizontal stay 11 at the cabled walkway on the side where the jacket 4 is planned to fall, one end of the prefabricated restraining column 9 is welded to the inner side of the middle position of the horizontal stay 11, and the restraining column 9 is ensured to be installed horizontally. The tug 6 is in place at the side of the jacket 4 planned to be laid down, one end of the steel wire rope 7 is connected with a dragging point on the tug 6, and the lute head 12 at the other end of the steel wire rope 7 is sleeved on the limiting column 9 (the steel wire rope 7 needs to be ensured to pass through the upper part of the horizontal support rod 11). Then, a first buoy 8 is firstly bound on a steel wire rope 7 within 3-5 m from the lute head 12, and a second buoy 13 is hung at the most end part of the lute head 12 through a binding rope 14.

After the jacket 4 is subjected to mud discharging, internal cutting and single-side mud discharging in the underwater steel pile 3 as shown in the figure 2, the tug boat 6 starts to slowly tighten the steel wire rope 7 to drag and lay down the jacket 4. In the process of falling, after the inclination angle of the jacket 4 is increased, the first buoy 8 and the second buoy 13 enter water successively to provide vertical upward buoyancy for the steel wire rope 7 and the lute head 12. Meanwhile, the included angle alpha between the steel wire rope 7 and the limiting column 9 is reduced from large to small.

As shown in fig. 3, as the jacket 4 continues to incline, when the included angle α between the steel wire rope 7 and the limiting column 9 is smaller than or equal to 90 °, and the buoyancy provided by the first buoy 8 and the second buoy 13 is larger than the friction between the lute head 12 and the limiting column 9, the first buoy 8 and the second buoy 13 drive the steel wire rope 7 and the lute head 12 to slide upwards until the steel wire rope 7 and the lute head 12 are completely released from the limiting column 9.

As shown in fig. 4, after the steel wire rope 7 and the lute head 12 are completely released from the jacket 4, the jacket 4 continues to sink due to inertia, and the steel wire rope 7 and the lute head 12 float on the sea surface under the buoyancy of the first buoy 8 and the second buoy 13.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. The utility model provides a wire rope automatic disengaging device which characterized in that: the device comprises a limiting column, a first buoy, a second buoy and a steel wire rope, wherein one end of the limiting column is fixed on the inner side of a horizontal support rod, the limiting column is perpendicular to the horizontal support rod, one end of the steel wire rope is connected with a tug, the other end of the steel wire rope is a lute head sleeved on the limiting column, the second buoy is arranged on the lute head, and the first buoy is arranged between the lute head and the joint of the steel wire rope and the tug.

2. The automatic steel wire rope disengagement device according to claim 1, characterized in that: the distance between the first buoy and the lute head is 3-5 m.

3. The automatic steel wire rope disengagement device according to claim 1, characterized in that: the side wall of the first buoy is fixedly connected with the steel wire rope.

4. The automatic steel wire rope disengagement device according to claim 1, characterized in that: the second buoy is connected with the lute head through a binding rope.

5. The automatic steel wire rope disengagement device according to claim 1, characterized in that: and an included angle between the steel wire rope and the limiting column is alpha, and when the alpha is larger than 90 degrees, the lute head is released from the limiting column.