CN219277749U - Arrangement structure of calibration beam of cable laying operation ship - Google Patents

Abstract

The utility model provides an arrangement structure of a calibration beam of a cable laying operation ship, which comprises a calibration beam assembly and two slotted holes; the groove holes are respectively formed on moon pool wave absorbing plates at two sides of the interior of the moon pool, and the positions of the two groove holes are correspondingly pear-shaped with smaller upper part and larger lower part; the calibration beam assembly comprises a calibration beam, a calibration lifting lug, two steel castings and two lifting lugs; the calibration lifting lug is connected with and partially inserted into the middle part of the calibration beam; the steel castings are connected in a cylindrical shape and are partially inserted into two ends of the calibration beam; two ends of the calibration beam are respectively provided with a lifting lug; the steel castings are respectively inserted into the slots. The arrangement structure of the calibration beam of the cable laying operation ship can solve the defect that the calibration beam cannot be fixed along with the two ends of the ship, and does not occupy any operation deck use area; the flexible detachable mounting mode can be used for exchanging calibration beams with different specifications at any time, and the device is simple to mount, flexible to operate, safe, reliable, economical and efficient.

Description

Arrangement structure of calibration beam of cable laying operation ship

Technical Field

The utility model relates to the technical field of cable laying operation boats, in particular to an arrangement structure of a calibration beam of a cable laying operation boat.

Background

With the great development of the wind power field, submarine pipe laying and cable operation are more and more important, and the deep open sea is more and more developed. Cabling vessels typically perform subsea pipelaying tasks by equipping the vessel with a pipelaying operation apparatus, the system of which is permanently fixed in the vicinity of the moonpool of the hull.

Tensioners are used as the main equipment in the pipe and cable laying system, and the pretensioning force generated by the tensioners slowly lays the pipe and cable preassembled on the ship on the seabed through the moon pool of the ship body. Whether the pretension meets the requirements is critical to complete the laying of the pipe, cable. Therefore, the pretension of the tensioner is calibrated before the pipe and cable laying operation.

The conventional practice mainly comprises the following two steps:

1. and checking the test hanging block. The corresponding tonnage 'test hanging block' is prepared on the shore in advance before the ship leaves the wharf to check the capacity of the tensioner. The process is to hoist the test hanging block from the wharf to the ship and below the tensioner by the wharf crane, and then hoist the test hanging block by the tensioner to verify whether the pretension of the tensioner meets the operation requirement. When different diameter pipe and cable equipment is laid, a plurality of corresponding tonnage test hanging blocks are prepared for calibration along with different pretension operation requirements of the tensioner. When the tensioner pretension needs to be recalibrated during offshore operations, the operating vessel needs to be returned to the quay or carry several "test hanging blocks" with the vessel. Not only occupies a large amount of operation deck area, but also can limit the running of the operation ship to deep open sea.

2. Calibration beam type verification. The calibration beam is pre-fixed on the shore in advance before the ship leaves the wharf, and the calibration beam has enough strength and rigidity and can test pretension of different orders. The calibration method is limited by the defect that two ends of the calibration beam need to be fixed, but the calibration method cannot be used when the ship leaves the dock.

When the cable laying operation ship is in deep sea operation, the pretension of the tensioner is calibrated in a mode that a plurality of risks and disadvantages exist, and the method is specifically expressed in the following steps:

1. the calibration mode of the test hanging block is as follows: the test hanging blocks with different specifications are required to be carried, a large amount of operation deck area is occupied, the test operation is complex, and great potential danger exists.

2. "calibration beam" calibration mode: is limited by the defect that two ends of the calibration beam need to be fixed, and can not be used with a ship all the time.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the arrangement structure of the calibration beam of the cable laying operation ship, which can solve the defect that the calibration beam cannot be fixed along with the two ends of the ship and does not occupy any operation deck use area; the flexible detachable mounting mode can be used for exchanging calibration beams with different specifications at any time, and the device is simple to mount, flexible to operate, safe, reliable, economical and efficient.

In order to achieve the above-mentioned object, the present utility model provides an arrangement structure of calibration beams for a cable laying operation ship, comprising a calibration beam assembly and two slots; the slotted holes are respectively formed in moon pool wave absorbing plates at two sides of the interior of the moon pool, and the positions of the two slotted holes are correspondingly pear-shaped with smaller upper part and larger lower part; the calibration beam assembly comprises a calibration beam, a calibration lifting lug, two steel castings and two lifting lugs; the calibration lifting lug is connected with and partially inserted into the middle part of the calibration beam; the steel castings are connected in a cylindrical shape and are partially inserted into two ends of the calibration beam; the two ends of the calibration beam are respectively provided with the lifting lugs; the steel castings are respectively inserted into the slots.

Preferably, the edge of the slot hole is formed by splicing three circular arcs, and the centers of the three circular arcs are arranged in a triangle; the radius of each arc is the radius of the steel casting.

Preferably, the center distance of the two circular arcs below is the radius of the steel casting.

Preferably, the distance between the center of the other upper arc and the center of the lower arc in the vertical direction is the radius of the steel casting.

Preferably, the calibration beam assembly further comprises a plurality of limiting plates detachably fixed at two ends of the calibration beam and contacting the corresponding moon pool wave absorbing plates.

Preferably, the calibration beam is made of high-strength steel; the material of calibration lug adopts super high strength steel.

The utility model adopts the technical proposal, which has the following beneficial effects:

1. the 'calibration beam' type pretension testing method completely replaces the 'test hanging block' type method, completely gets rid of the requirements of the test on related equipment of the wharf, and can be completed anytime and anywhere.

2. The calibration beam is arranged in the moon pool, an operation deck is not needed at all, a special cabin is not needed for storage, and the requirement on the arrangement space is met.

3. The calibration beam is movable, the replacement is very convenient, the calibration beam is assembled with the use and the normal operation of the moon pool is not affected.

4. The weight of the calibration beam is only 1/10 of the weight of the test hanging block, so that the pretension calibration cost of the tensioner is effectively reduced, and the operation is very simple.

5. The center distance of the two circular arcs below is the radius of the steel casting, so that the calibration beam can move left and right during installation/disassembly and is convenient for installation;

6. the distance between the circle centers of the other circular arcs above and the perpendicular direction of the circle centers of the two circular arcs below is the radius of the steel casting, so that when the pretension force calibration is ensured, the steel casting at the two ends is tightly attached to the upper ends of the slotted holes after the calibration beam is pulled upwards.

Drawings

FIG. 1 is a schematic structural view of an arrangement of calibration beams of a cabling operation ship according to an embodiment of the present utility model;

FIG. 2 is a top view of a calibration beam assembly according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an embodiment of the present utility model at a calibration beam assembly calibration lug;

FIG. 4 is a schematic view of a slot structure of an embodiment of the present utility model after the alignment beam assembly is installed;

fig. 5 to 7 are exploded views of the installation of the calibration beam assembly for the installation method of the calibration beam of the cabling operation ship according to the embodiment of the present utility model.

Detailed Description

The following description of the preferred embodiments of the present utility model will be given with reference to fig. 1 to 7 of the accompanying drawings, so that the functions and features of the present utility model can be better understood.

Referring to fig. 1 to 7, an arrangement structure of a calibration beam for a cable laying operation ship according to an embodiment of the present utility model includes a calibration beam assembly and two slots 8; the groove holes 8 are respectively formed in the moon pool wave absorbing plates 4 at two sides of the interior of the moon pool, the moon pool wave absorbing plates 4 are arranged at the inner side of the moon pool peripheral wall 5, and the positions of the two groove holes 8 are correspondingly pear-shaped with smaller upper part and larger lower part; the calibration beam assembly comprises a calibration beam 1, a calibration lifting lug 2, two steel castings 3 and two lifting lugs 6; the calibration lifting lug 2 is connected with and partially inserted into the middle part of the calibration beam 1; the steel castings 3 are connected in a cylindrical shape and are partially inserted into the two ends of the calibration beam 1; two ends of the calibration beam 1 are respectively provided with a lifting lug 6; the steel castings 3 are respectively inserted into the slots 8.

The edge of the slot hole 8 is formed by splicing three circular arcs, and the centers of the three circular arcs are arranged in a triangle; the radius of each arc is the radius of the steel casting 3.

The center distance of the two circular arcs below is the radius of the steel casting 3, so that the calibration beam assembly can move left and right during installation/disassembly and is convenient for installation.

The distance between the center of the other circular arc above and the center of the two circular arcs below in the vertical direction is the radius of the steel casting 3, so that when the pretension force calibration is guaranteed, the steel casting 3 at the two ends is tightly attached to the upper ends of the slotted holes 8 after the calibration beam 1 is pulled upwards.

The shape of the slotted hole 8 cannot be too large, so that the calibration beam 1 is prevented from falling down along with the shaking of the ship body; the shape of the slot 8 cannot be too small, which is not beneficial for the disassembly and assembly of the calibration beam 1.

The calibration beam assembly further comprises a plurality of limiting plates 7, and the limiting plates 7 are detachably fixed at two ends of the calibration beam 1 and contact the corresponding moon pool wave absorbing plates 4. In order to prevent dislocation movement along with ship movement, the positioning problem of the calibration beam assembly is effectively solved by the aid of the limiting plates 7.

The calibration beam 1 is constructed to meet target tensioner pretension specifications, and thus each component size is required to meet strength requirements. Usually, pretension of each tensioner is large, and the material of the calibration beam 1 is high-strength steel; the calibration lifting lug 2 is used as a stress concentration area, and the material of the calibration lifting lug 2 is ultra-high strength steel.

The calibration beam assembly is installed by utilizing structural arrangement of a standard moon pool wave absorbing plate 4 (also called a buffer cavity damping plate), and the load requirement of the round steel casting 3 at the position is reasonably met through calculation and analysis. The reinforcing structure of the moon pool has no influence on the moon pool and adjacent structures, and the realization of other functions of the moon pool is not influenced.

The arrangement and the materials of the calibration beam components can be adjusted according to the pretension technical requirement of the tensioner; the shape of the circular steel castings 3 at the two ends and the form of the slotted holes 8 adjacent to the circular steel castings (namely the moon pool wave absorbing plate 4) can be adjusted along with the shape of the steel castings 3.

The calibration beam component is not welded with the adjacent structure, and the round steel castings 3 at the two ends of the calibration beam component are connected with the moon pool wave absorbing plate 4 through the slotted holes 8, so that the calibration beam component is convenient to assemble, disassemble and replace.

The utility model relates to a method for installing a calibration beam of a cable laying operation ship, which is based on a calibration beam assembly and a slotted hole 8; the method comprises the following steps:

s1: lifting the calibration beam assembly through the lifting lug 6, so that the first end of the calibration beam assembly is aligned to the center of a slotted hole 8, and the connecting line of the calibration beam assembly and the centers of the two slotted holes 8 forms an inclination angle a of 20 degrees in the horizontal direction;

s2: inserting the first end of the alignment beam assembly into the aligned slot 8 and slowly reducing the tilt angle to or near 5 ° tilt angle b with the slot 8 as a fulcrum;

s3: the tilt angle continues to decrease until the second end of the alignment beam assembly is inserted into the other slot 8.

The process of removing the present calibration beam assembly is reversed.

The present utility model has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the utility model based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the utility model, which is defined by the appended claims.

Claims (6)

1. An arrangement structure of a calibration beam of a cable laying operation ship is characterized by comprising a calibration beam assembly and two slotted holes (8); the slotted holes (8) are respectively formed in moon pool wave absorbing plates (4) at two sides of the interior of the moon pool, and the positions of the two slotted holes (8) are correspondingly pear-shaped with smaller upper part and larger lower part; the calibration beam assembly comprises a calibration beam (1), a calibration lifting lug (2), two steel castings (3) and two lifting lugs (6); the calibration lifting lug (2) is connected with and partially inserted into the middle part of the calibration beam (1); the steel castings (3) are connected in a cylindrical shape and are partially inserted into the two ends of the calibration beam (1); the two ends of the calibration beam (1) are respectively provided with a lifting lug (6); the steel castings (3) are respectively inserted into the slotted holes (8).

2. The arrangement structure of the calibration beam of the cable laying operation ship according to claim 1, characterized in that the edge of the slot (8) is formed by splicing three circular arcs, and the centers of the three circular arcs are arranged in a triangle; the radius of each arc is the radius of the steel casting (3).

3. Arrangement of cabling process vessel calibration beams according to claim 2, characterized in that the centre distance of the two arcs below is the radius of the steel casting (3).

4. A cabling operation ship calibration beam arrangement according to claim 3, characterized in that the distance in the vertical direction of the centre of the other arc above from the centre of the two arcs below is the radius of the steel casting (3).

5. The arrangement of calibration beams for a cable laying work vessel according to claim 4, characterized in that the calibration beam assembly further comprises a plurality of limiting plates (7), the limiting plates (7) being detachably fixed to both ends of the calibration beam (1) and contacting the corresponding moon pool wave absorbing plates (4).

6. The arrangement of calibration beams for a cable laying work vessel according to claim 5, characterized in that the calibration beams (1) are made of high strength steel; the calibrating lifting lug (2) is made of ultra-high strength steel.

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