Methods and processes for modification of ship structures

The present invention relates to ships and, in particular, to a method of modifying the structure of a ship.

Background technology:

1, ship construction, to modify the hull structure, generally in the hull of the modification of the area, and then remove the original structure of the modification area, and then re-prepared inserts welded to the modification of the area to replace the original structure, and ultimately, by virtue of the visual inspection of the modification of the area there is no obvious welding deformation to be done.

When there are important equipment installed in the area near the modification area, if the area of the modification area is relatively small, the welding deformation is relatively small, usually does not affect the important equipment; if the area of the modification area is relatively large, then the welding deformation will be followed by an increase in the installation of important equipment is difficult to meet the requirements of the installation of the accuracy of the important equipment, which affects the installation of the important equipment and the use of the equipment. For example, when carrying out structural modification work on the transom of the ship, if the area of the modification area is too large, it may lead to deviation of the rudder and propeller axis angle and position, and the ship will need to re-enter the dock for repair, which will increase the ship's construction cost and construction period.

Technical realisation ideas

One, the present invention has the object of providing a method. Secondly, the method is directed to the modification of ship structures. Thirdly, the method is capable of reducing welding deformation after modification of the ship structure. Fourthly, it ensures that important equipment in the vicinity of the modification area can be installed and put into use normally.

2. The technical solutions used in the present invention to achieve this are:

3. A method of modifying the structure of a ship, comprising the following steps:

Scenario 4, step s1, is to go about selecting a modification zone of the ship, followed by dividing said modification zone into a plurality of fill zones along the length of said modification zone.

5, s2: Preparation of inserts to replace the original structure within each of said filled areas;

s3, in the order of modification from the two ends of the length direction of the said modification area toward the middle, in each filler area, the original structure is first removed, and then the corresponding piece of insert is welded to the filler area, and so on, until all the filler areas have been filled.

In step s3, as an option for the modification of the ship structure, a reinforcement is provided between the non-modified area of the ship and the inserts to support the inserts before welding the corresponding inserts in each of the filled areas.

This option is a method of modifying the structure of a ship, where one end of the reinforcement is connected to the insert with the help of a spot weld, and the other end of the reinforcement is connected to the non-modified area by means of a spot weld.

9, as an optional option of the ship structure modification method, more than one of those inserts after welding, and then go to remove all of those reinforcing parts.

In step s3, as an optional option of the method of modifying the ship structure, the removal of the original structure is carried out in the left end of the filling area along the length of the modification area, and the welding of the insert is carried out in the right end of the filling area thereof, alternating between the two.

In step s3, in an optional way of the method of modifying the structure of the ship, before welding the insert, the insert has to be moved to the corresponding filling area, and the welding position of the insert and the welding position of the filling area have to be aligned.

As an optional method of modification of the ship's structure, the insert is lifted by means of lifting equipment or supported by means of jacking equipment so that the weld position of the insert is aligned with the weld position of the filler zone.

13. In the method of modifying the structure of the ship, there are various options, one of which is that after the completion of step s3, there will be step s4, which is to detect the welding deformation of the filling area in the modification area, remove the inserts in the failed filling area, and then re-weld those inserts.

14, when the ship structure modification method of optional planning, the embedded parts to weld again, and then go to repeat step s4, until the modification of the welding deformation of the area to meet the standard.

15. In step s4, as an option to the method of modifying the ship structure, the welding distortion in said filled area is detected with the aid of measuring instruments.

16, The beneficial effects of the present invention are:

Firstly, the method for modifying a ship structure proposed in the present invention divides the modification area into a plurality of filling areas along the length direction, then prepares the inserts required for each filling area, and finally, in accordance with the order of modification from the two ends of the modification area in the length direction towards the middle, firstly, removes the original structure in each filling area, and then welds corresponding inserts in the filling areas until all the filling areas are filled up. By adopting the above ship structure modification method, the large modification area is divided into several small modification areas, and the modification is carried out sequentially from the two ends of the modification area towards the middle, and the original structure is removed and the inserts are welded one by one in each of the modification areas, which reduces the welding deformation in the modification area and in turn reduces the welding deformation in the modification area, and ensures that the important equipments in the adjacent modification area are installed and used normally.

Technical characteristics:

1. A method for modifying the structure of a ship, characterised in that it comprises the steps of:

In step s3, a reinforcing member (3) is provided between the non-modified area of the ship and the patch (2) to support the patch (2) before welding the corresponding patch (2) to each filled area, which is a feature of the method of modifying the structure of a ship according to claim 1.

3. A method of modifying the structure of a ship according to claim 2, characterised in that one end of the reinforcement (3) is connected to the insert (2) by means of a spot weld and the other end of the reinforcement (3) is connected to the non-modified area by means of a spot weld.

4. A method of modifying the structure of a ship according to claim 3, characterised by removing all said reinforcements ( 3) after the welding of a plurality of said inserts (2) has been completed.

5. The method of modifying the structure of a ship according to any one of claims 1 to 4, characterised in that, in step s3, the removal of said original structure and the welding of said inserts (2) are carried out alternately in said filler zones, which are located at the left and right ends of said modification zone (1) along the length of said zone.

6. A method of modifying the structure of a ship according to any one of claims 1 to 4, characterised in that, in step s3, before welding said insert (2), said insert (2) is moved to the corresponding filler zone, and said insert (2) is welded in a position aligned with the weld position of said filler zone.

7. Modification of the ship structure according to claim 6, characterised in that said insert (2) is lifted with the aid of lifting equipment or supported by jacking equipment, so that the welding position of said insert (2) can be aligned with the welding position of said filler zone.

The method of modification of a ship structure according to any one of claims 1 to 4, characterised in that step s3 is followed by step s4: detection of weld distortion in the filler zones in the modification area (1), removal of the inserts (2) of the non-compliant filler zones, and welding of the inserts (2) again.

The method of modification of a ship structure according to claim 8, in particular in that after the insert (2) is welded again, step s4 is repeated until the weld deformation of the modification zone (1) reaches a passing standard.

The method for modifying the structure of a ship according to claim 8, characterised in that in step s4 the welding distortion of the filler zone is detected by means of a measuring instrument.

Technical summary

The field to which the present invention belongs is the field of ship technology, and more specifically relates to a modification method for a ship structure. The method for modifying the structure of a ship comprises the following steps: step S1 is such that a modification area of the ship is to be selected and divided into a plurality of filler zones along the length of the modification area. Step S2 is to make inserts for replacing the original structure in each of the filler zones. Step S3 is to remove the original structure and then weld the corresponding inserts into the filling zones in accordance with the order of modification from the ends of the modification zones in the length direction toward the middle, until all the filling zones have been filled. By adopting the above method of modifying the ship structure, the large modification area is divided into a number of small filling areas, and the removal of the original structure and welding of the inserts are carried out in the filling areas in accordance with the order of modification from the ends of the modification area in the direction of the length of the modification area toward the middle, which reduces the welding deformation in the filling areas, thereby reducing the welding deformation in the modification areas, and ensures that the important equipments in the vicinity of the modification area can be installed and used normally.

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