CN214087539U

CN214087539U - Soft rigid arm single-point movable lifting device

Info

Publication number: CN214087539U
Application number: CN202022010777.XU
Authority: CN
Inventors: 王小华
Original assignee: Yiu Lian Dockyards (shekou) Ltd; China Merchants Heavy Industry Shenzhen Co Ltd
Current assignee: China Merchants Jinling Shipping Nanjing Co ltd; Yiu Lian Dockyards (shekou) Ltd; China Merchants Heavy Industry Shenzhen Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-08-31
Anticipated expiration: 2030-09-15

Abstract

The utility model provides a soft rigid arm single-point movable lifting device, which comprises two truss type supporting towers and a movable beam; two truss type support towers are positioned at the left side and the right side of the single-point bearing rotating head, and the bottom of each truss type support tower is fixed with the dock bottom; the movable cross beam spans above the two truss type support towers; two groups of lifting mechanisms are arranged on the movable cross beam, and the positions of the two groups of lifting mechanisms correspond to two groups of combined lifting lugs on the single-point bearing rotating head; the top of the truss type supporting tower is provided with a moving track, the moving track is perpendicular to the movable cross beam, the movable cross beam is provided with a rolling device, and the rolling device is used for moving on the moving track; the truss type support tower further comprises four support columns, and the four support columns are located between the two truss type support towers. The utility model greatly shortens the docking period and reduces the lease cost of using the floating crane for construction for a long time; the lifting device is detachably designed and manufactured, the height can be flexibly adjusted, and the use is rapid and convenient.

Description

Soft rigid arm single-point movable lifting device

Technical Field

The utility model relates to a soft rigid arm single-point movable hoisting device mainly is applicable to boats and ships FPSO and the external soft rigid arm single-point mooring ware of FSO and repairs promotion bearing end face to level.

Background

The main function of the external turret mooring system is to locate the FPSO and FSO at a predetermined sea area, and to perform well flow transportation, power transmission, communication and other functions. The soft rigid arm type floating single-point system consists of a jacket, a rotary joint, a mooring articulated arm and a bracket on an oil storage wheel. The rigid arm is hinged at the joint, can rotate along with the wind waves and the tides around the general column on the jacket, and can lift and swing within a certain range along with the surges, so the mooring is called as soft rigid arm type single-point mooring. Single point moorings are therefore important components of FPSOs and FSOs.

Because the weight of the hanging piece of the soft rigid arm single-point mooring device is large, the hanging weight can reach hundreds of even thousands of tons, and the method for repairing and processing the end surface of the soft rigid arm single-point bearing in a shipyard mainly comprises the following two methods:

1. the ship body enters a dry dock, the structure at the joint of the single-point bearing rotary joint and the soft rigid arm is cut off, then the bearing end rotary joint is hung on the dock and transferred to a workshop for processing and repairing, and then the bearing end rotary joint is transferred to the dock bottom and the soft rigid arm for welding and reinstalling after repairing; the dry dock resources are occupied for a long time, the lifting is transferred by multiple vehicles, and a large amount of thermal operation is carried out, so that the repair cost is greatly increased.

2. And (4) repairing in a floating state, renting a large floating crane, and pulling a bearing rotary joint to be horizontal by using a hook until the end face is repaired and then releasing the hook. The cost of renting the floating crane for a long time is increased, wave flow influence exists in a floating state, the ship body can fluctuate, the construction time is prolonged, and the construction difficulty and the safety risk are increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who needs the solution: the defects that the end face of the rotary joint of the single-point bearing occupies a dry dock place for a long time and a large amount of thermal engineering and large-piece hoisting operation are high in cost for multiple times are overcome, the cost of using the floating crane for construction for a long time in a floating state is reduced, the risk of long-time floating construction is reduced, and therefore the end face repairing work of the rotary joint is completed safely and quickly.

The utility model discloses hoisting device's design is realized through following technical scheme:

a soft rigid arm single-point movable lifting device comprises two truss type supporting towers and a movable cross beam;

two truss type support towers are positioned at the left side and the right side of the single-point bearing rotating head, and the bottoms of the truss type support towers are welded and fixed with the steel embedded parts at the dock bottom; the movable cross beam spans above the two truss type support towers; two groups of lifting mechanisms are arranged on the movable cross beam, and the positions of the two groups of lifting mechanisms correspond to two groups of combined lifting lugs on the single-point bearing rotating head;

the top of the truss type supporting tower is provided with a moving track, the moving track is perpendicular to the movable cross beam, the movable cross beam is provided with a rolling device, and the rolling device is used for moving on the moving track;

the truss type support tower further comprises four support columns, and the four support columns are located between the two truss type support towers.

And moving devices are arranged at the bottoms of the four supporting upright columns and move below the movable cross beam.

The lifting mechanism comprises a hydraulic jack fixed on the movable cross beam, the hydraulic jack is further connected with a steel wire rope and a bearing block, and the bearing block is used for being connected with two sets of combined lifting lugs on the single-point bearing rotating head.

The utility model discloses repair the mode contrast with current and have following advantage:

the use of the lifting device greatly shortens the docking period and saves the site resource cost; the construction of a floating crane hook is not required to be rented for a long time, so that the renting cost of the construction of using the floating crane for a long time is reduced; the lifting device is detachably designed and manufactured, can flexibly adjust the height, is quick and convenient to use, is safe and reliable, can be repeatedly used, and can bear the quick lifting and the releasing of a large-tonnage lifting piece.

The utility model discloses the fastener experiment is used for the soft rigid arm formula single point bearing swivel head end face machining of FSO "CHI LINH" wheel to repair, and the effect is very obvious, shortens the depressed place period greatly to construction cost has been practiced thrift.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the combined lifting lug of the present invention;

FIG. 3 is a schematic structural view of the rolling device of the present invention;

FIG. 4 is a schematic side view of the working state of the present invention;

fig. 5 is a schematic top view of the working state of the present invention.

Detailed Description

The technical scheme of the utility model is explained by combining the attached drawings.

As shown in fig. 1 and 2, a soft rigid arm single-point movable lifting device is composed of 6 parts, two truss type supporting towers 1 with 7 meters in length, 4.45 meters in width and 25 meters in height and with wide lower parts and narrow upper parts; a movable cross member 2; two sets of rolling devices 3; two groups of lifting mechanisms comprise a hydraulic jack 4, a steel wire rope 5 and a bearing block 6; four supporting columns 7 with the height of 17 meters; two sets of combined lifting lugs 8;

as shown in fig. 4 and 5, two truss-type support towers 1 are positioned at the designated positions on the left and right sides of the single-point bearing rotating head, and the bottom of the truss-type support tower 1 is welded and fixed with the steel embedded part of the dock bottom; a movable beam 2 with a rolling device 3 is connected above the truss type supporting tower frame 1 in a left-right crossing manner; as shown in fig. 3, the rolling device 3 is characterized in that hydraulic jacks 4 in two groups of lifting mechanisms are arranged at the top of the movable cross beam 2, and the hydraulic jacks are arranged at positions with the same width as two groups of combined lifting lugs 8 on the single-point bearing rotating head; two sets of combined lifting lugs 8 are welded at the side plates on the left side and the right side of the single-point bearing rotating head, and a reinforcing structure is made to guarantee that the single-point bearing rotating head can bear 500 tons of tensile strength.

In a dock, two truss type supporting towers 1 are used as supporting points, a movable cross beam 2 stretching over a single point is used as a simply supported beam for bearing, hydraulic jacks 4 of two groups of lifting mechanisms are fixed on a base of the movable cross beam 2, and bearing blocks 6 at the bottom of a steel wire rope 5 are connected to combined lifting lugs 8 on two sides of a single-point bearing rotating head. Because the hinge end of the soft rigid arm is fixed on the dock bottom, the bearing end is taken as the movable end and lifted upwards along an arc-shaped movable track when lifted by taking the hinge end as a fixed circle center. In order to ensure that the steel wire rope 5 is vertically stressed, the movable cross beam 2 moves back and forth through the rolling devices 3 at the two ends to adjust the vertical angle. After the bearing surface is lifted to the horizontal position, the hydraulic jack 4 stops lifting, and then the four support upright posts 7 are moved to the strong structure positions corresponding to the bottom of the single-point bearing rotating head to be supported and fixed, so that the stressed compaction is ensured. After the bearing is stable, the bearing end face can be machined and repaired, after the bearing end face is finished and checked, the supporting upright post 7 is moved away, and the bearing rotating head is slowly lowered to the bottom of the dock through the same method, so that the repairing work is finished. After the whole set of lifting device is removed, the ship can be undocked.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A soft rigid arm single-point movable lifting device is characterized by comprising two truss type supporting towers (1) and a movable cross beam (2);

two truss type supporting towers (1) are positioned at the left side and the right side of the single-point bearing rotating head, and the bottoms of the truss type supporting towers (1) are welded and fixed with the steel embedded parts at the dock bottom; the movable beam (2) spans above the two truss type support towers (1); two groups of lifting mechanisms are arranged on the movable cross beam (2), and the positions of the two groups of lifting mechanisms correspond to two groups of combined lifting lugs (8) on the single-point bearing rotating head;

the top of the truss type supporting tower frame (1) is provided with a moving track, the moving track is perpendicular to the movable cross beam (2), the movable cross beam (2) is provided with a rolling device (3), and the rolling device (3) is used for moving on the moving track;

the truss type tower crane further comprises four supporting columns (7), wherein the four supporting columns (7) are located between the two truss type supporting towers (1).

2. A soft rigid arm single point movable lifting device according to claim 1, characterized in that the bottom of four supporting columns (7) is provided with a moving device, and the movable beam (2) moves below.

3. The single-point movable lifting device with the soft rigid arm according to claim 1, wherein the lifting mechanism comprises a hydraulic jack (4) fixed on the movable cross beam (2), the hydraulic jack (4) is further connected with a steel wire rope (5) and a bearing block (6), and the bearing block (6) is used for being connected with two sets of combined lifting lugs (8) on the single-point bearing rotating head.