CN108773457B - Large-scale annular total segment folding and positioning method - Google Patents

Large-scale annular total segment folding and positioning method Download PDF

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Publication number
CN108773457B
CN108773457B CN201810550733.0A CN201810550733A CN108773457B CN 108773457 B CN108773457 B CN 108773457B CN 201810550733 A CN201810550733 A CN 201810550733A CN 108773457 B CN108773457 B CN 108773457B
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middle ring
ring segment
segment
stern
ring section
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CN108773457A (en
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林仁志
龙汉新
张光锋
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Guangzhou Shipyard International Co Ltd
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Guangzhou Shipyard International Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00Building or assembling vessels or marine structures, e.g. hulls or offshore platforms

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Abstract

The invention discloses a large annular total segment folding and positioning method, which comprises the following steps: s100, providing a stern ring segment and a middle ring segment of the ship, and building the stern ring segment and the middle ring segment at a set distance; s200, after the stern ring segment and the middle ring segment are built, fixing the stern ring segment, and arranging a plurality of adjusting trolleys below the middle ring segment; step S300, starting a plurality of adjusting trolleys to sequentially carry out jacking operation, horizontal adjustment and center line adjustment on the middle ring segment so as to enable the middle ring segment to be located at a first folding position; and S400, starting the plurality of adjusting trolleys to enable the middle ring section to move towards the stern ring section so as to enable the middle ring section to be located at the second folding position and folded with the stern ring section. By arranging the adjusting trolley, the position of the middle ring section can be accurately adjusted in the process of folding the middle ring section and the stern ring section, and the precision requirement of folding the middle ring section and the stern ring section is met.

Description

Large-scale annular total segment folding and positioning method
Technical Field
The invention relates to the technical field of ships, in particular to a large annular block folding and positioning method.
Background
The existing common ship body folding method is docking or boarding platform folding in a mode of a total assembly block, and the total assembly block is integrally hoisted by adopting gantry crane equipment. The hoisting capacity of the gantry crane equipment is limited, the overall assembling scale of the ship body segments is greatly limited, and the integral hoisting of the annular overall segment after the overall assembling is difficult to realize, so that the gantry crane equipment often participates in the dock or closure of the slipway in the form of the overall segment, the period of the slipway of the dock is difficult to further shorten, and the shipbuilding efficiency is improved to reach the bottleneck. After the block is closed, a large amount of shell, outfitting and coating operations face the difficulties of time-space intersection, poor operation environment, high construction difficulty, short operation period, tense construction nodes and the like, thus not only increasing the shipbuilding cost, but also restricting the development of enterprises.
Technical personnel provide a mode of adopting an annular block to assemble and then integrally move and assemble to form a ship, namely, the ship forms a bow ring section, at least one middle ring section and a stern ring section, the bow ring section, the at least one middle ring section and the stern ring section are conveyed to an appointed folding position by adopting translation equipment, the translation equipment comprises a bow stern transportation tool and a middle ring section transportation tool, the bow stern transportation tool comprises a ship moving trolley and a supporting platform, and the middle ring section transportation tool is a power module vehicle. This way of shaping the ship, although it eliminates the use of cranes, it still has the following drawbacks: (1) the ship moving trolley and the power module trolley which can only move horizontally are adopted, so that accurate alignment of the annular main section cannot be realized, namely the annular main section is poor in positioning effect and large in manufacturing error, the subsequent repair process is large, and the manufacturing difficulty is increased; (2) all the annular main sections need to be moved to the designated positions, and the positions of all the annular main sections need to be adjusted, so that the adjustment difficulty is increased, and the manufacturing error is improved.
Disclosure of Invention
The invention aims to: the method for positioning the closure of the large annular total section is simple to operate, can accurately realize positioning in the closure process of the large annular total section, and ensures the building precision of a ship.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for folding and positioning the large annular total section comprises the following steps:
s100, providing a stern ring segment and a middle ring segment of a ship, and building the stern ring segment and the middle ring segment at a set distance;
s200, after the stern ring segment and the middle ring segment are built, fixing the stern ring segment, and arranging a plurality of adjusting trolleys below the middle ring segment;
step S300, starting a plurality of adjusting trolleys to sequentially carry out jacking operation, horizontal adjustment and center line adjustment on the middle ring segment so as to enable the middle ring segment to be located at a first folding position;
and S400, starting the plurality of adjusting trolleys to enable the middle ring section to move towards the stern ring section so as to enable the middle ring section to be located at a second folding position and folded with the stern ring section.
As a preferable scheme of the method for folding and positioning the large annular total segment, the jacking operation comprises the following steps: and the middle ring section is jacked up along the Z-axis direction by the adjusting trolley until the distance between the middle ring section and the ground is about 100mm, and the outer plate support and the ship bottom linear pier wood which block displacement are removed.
As an optimal scheme of the large annular total segment folding and positioning method, before the outer plate support and the ship bottom linear blocks which are blocked and displaced are removed, the rest blocks of the middle ring segment are reduced by 20-50 mm.
As a preferred scheme of the large annular total segment folding and positioning method, the horizontal adjustment is as follows: the adjusting trolley rotates the middle ring section along the X-axis direction and the Y-axis direction respectively, and the error between the levelness of the middle ring section and the levelness of the stern ring section is not more than +/-1 mm.
As a preferred scheme of the large annular total segment folding and positioning method, the center line is adjusted as follows: the adjusting trolley firstly rotates the middle ring section along the Z axis, then moves the middle ring section along the Y axis, and enables the central line of the middle ring section to be overlapped with the central line of the stern ring section.
As a preferable scheme of the method for positioning the large annular total segment in the closed position, the step S400 includes the following steps:
s410, pre-closing the middle ring segment along the X-axis direction by the adjusting trolley, and determining the movement error of the adjusting trolley;
step S420, the adjusting trolley moves the middle ring segment for a first distance along the X-axis direction each time until the gap of a closure opening is not more than a second distance, the actual moving distance is measured after each movement, the moving errors of multiple movements are comprehensively analyzed, and the movement compensation amount is determined;
step S430, checking the levelness and the center line of the middle ring segment, and ensuring that the levelness and the center line are within a tolerance range;
step S440, measuring the gap of the closure opening, and determining the final closure movement distance to be accurate to 1 mm;
and S450, releasing the movement compensation amount according to the movement distance of final folding, moving the middle ring segment to the right position once by the adjusting trolley, checking the gap of the folding opening, and welding the folding opening.
As a preferable scheme of the method for positioning the large annular total segment by folding, the step S410 includes the following steps:
s411, enabling the middle ring segment to be close to the stern ring segment along an X axis by the adjusting trolley, moving the middle ring segment for each time by the first distance, measuring an actual walking distance after each movement is finished, and mastering the moving error of the adjusting trolley until the folding opening gap is not larger than the second distance;
step S412, checking the levelness and the center line of the middle ring segment, and ensuring that the levelness and the center line are within a tolerance range;
step S413, the adjusting trolley enables the middle ring segment to continuously approach the stern ring segment along the X axis until the folding opening gap is not larger than a third distance;
step S414, the middle ring segment is moved along the Z axis by the adjusting trolley, so that the central line of the middle ring segment is staggered with the central line of the stern ring segment;
step S415, determining the end face allowance of the middle ring segment, and trimming the allowance;
step S416, the middle ring section is moved along the Z axis by the adjusting trolley, so that the central line of the middle ring section is superposed with the central line of the stern ring section;
and S417, moving the middle ring section away from the stern ring section along the X axis by the adjusting trolley to enable the closing opening gap to be 2 m.
As a preferable scheme of the large annular total segment folding and positioning method, the first distance is 500mm, the second distance is 500mm, and the third distance is 50 mm.
As a preferable scheme of the large annular total segment folding and positioning method, the step S414 is: and the middle ring section is moved upwards along the Z axis by the adjusting trolley, so that the central line of the middle ring section and the central line of the stern ring section are staggered by 5 mm.
As a preferable scheme of the large annular total segment folding and positioning method, the step S414 is: and the middle ring section moves downwards along the Z axis by the adjusting trolley, so that the central line of the middle ring section and the central line of the stern ring section are staggered by 5 mm.
The embodiment of the invention has the beneficial effects that: the ship is assembled in a large ring segment folding mode, so that the integrity of the cabin can be improved, the manufacturing period of the ship is effectively shortened, and the manufacturing cost is reduced; the stern ring segment is fixed, and only the middle ring segment is moved, so that the moving workload of the ring segment can be reduced, and the closing precision is improved; by arranging the adjusting trolley, the position of the middle ring section can be accurately adjusted in the process of folding the middle ring section and the stern ring section, and the precision requirement of folding the middle ring section and the stern ring section is met.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic view of the intermediate ring segment of the present invention in a state of translation in the Z-axis direction (adjustment trolley not shown).
FIG. 2 is a schematic view of the intermediate ring segment of the present invention in a state of translating along the Y-axis.
Fig. 3 is a schematic view of the intermediate ring segment of the present invention in a state of translation along the X-axis (adjustment trolley not shown).
Fig. 4 is a schematic view of the intermediate ring segment of the present invention in a state of rotating in the Y-axis direction (adjustment cart not shown).
FIG. 5 is a schematic view of the intermediate ring segment of the present invention in a state of rotating in the Z-axis direction.
FIG. 6 is a schematic view of the intermediate ring segment of the present invention in a state of rotating in the X-axis direction.
In the figure:
1. a stern ring section; 2. a middle ring segment; 3. adjusting the trolley; 4. the center of the circle is rotated.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 6, an embodiment of the present invention provides a method for closing and positioning a large annular total segment, including the following steps:
step S100, providing a stern ring segment 1 and a middle ring segment 2 of a ship, and building the stern ring segment 1 and the middle ring segment 2 at a set distance;
step S200, after the stern ring segment 1 and the middle ring segment 2 are built, fixing the stern ring segment 1, and arranging a plurality of adjusting trolleys 3 below the middle ring segment 2;
step S300, starting the plurality of adjusting trolleys 3 to sequentially carry out jacking operation, horizontal adjustment and center line adjustment on the middle ring segment 2 so as to enable the middle ring segment 2 to be located at a first folding position;
step S400, starting the plurality of adjusting trolleys 3 to enable the middle ring section 2 to move towards the stern ring section 1, so that the middle ring section 2 is located at a second folding position and folded with the stern ring section 1.
The ship is assembled in a large ring segment folding mode, so that the integrity of the cabin can be improved, the manufacturing period of the ship is effectively shortened, and the manufacturing cost is reduced; the stern ring segment 1 is fixed, and only the middle ring segment 2 is moved, so that the moving workload of the ring segments can be reduced, and the closing precision is improved; by arranging the adjusting trolley 3, the position of the middle ring segment 2 can be accurately adjusted in the process of folding the middle ring segment 2 and the stern ring segment 1, and the precision requirement of folding the middle ring segment 2 and the stern ring segment 1 is met.
The large-scale ring segment folding of the embodiment of the invention is built in a 1+1+ n mode, and the whole ship is divided into a stern ring segment 1, a middle ring segment 2 (namely a large-scale ring segment of a cargo hold) and 4 bow upper building total segments for folding and carrying.
The stern ring segment 1 and the middle ring segment 2 are assembled on a platform line in an assembling assembly mode, a total segment mode and a segmented mode, the stern ring segment 1 is fixed in place after being finished, the middle ring segment 2 and the stern ring segment 1 are built at a certain distance in the longitudinal direction, and after the ring segments are finished, the stern ring segments are folded with the stern ring segment 1 through adjusting a trolley 3 in the longitudinal translation mode before light is observed. The adjusting trolley 3 is a rail-type power trolley and has the functions of synchronous jacking or descending, synchronous walking, transverse moving and load grouping or limiting, and the rotation of the adjusting trolley 3 is realized by different jacking distances of a plurality of adjusting trolleys 3.
The method for folding and positioning the large annular total section of the platform line has the following advantages that:
(1) the ship is built by adopting a large annular total section folding method, the integrity of the cabin can be improved, and partial working procedures move forward, so that the shipbuilding period is shortened, and the production cost is reduced;
(2) the adjustment trolley 3 is adopted to carry out shifting and folding on the annular main section, the limitation of the hoisting capacity of a gantry crane is avoided, the adjustment trolley 3 can be arranged in a plurality of groups, the lifting weight is large, the shifting and folding on the large annular main section can be carried out, and the adjustment trolley is not only suitable for building small ships, but also suitable for building medium and large ships and has wide application range;
(3) the folding precision can be effectively controlled, and the precision requirement is met.
In a preferred embodiment of the present invention, the jacking operation is: and the adjusting trolley 3 lifts the middle ring section 2 along the Z-axis direction until the middle ring section 2 is about 100mm away from the ground, and removes the outer plate support and the ship bottom linear pier wood which block the displacement.
Jacking operation can break away from planking support and hull bottom line type pier wood with 2 bottoms of intermediate ring section, and the later stage of being convenient for removes, and removes 100mm, and this distance can reduce the removal degree of difficulty when guaranteeing that the later stage removes smoothly, and then reduces the consumption of the energy.
In this embodiment, before the displacement of the planking supports and the ship bottom line-type blocks which block the displacement is removed, the rest blocks of the middle ring segment 2 are lowered by a distance of 20-50 mm. The rest of the piers are lowered to prevent the middle ring segment 2 from sitting in the pier in advance and avoid the movement failure.
In another preferred embodiment of the present invention, the level adjustment is: the adjusting trolley 3 respectively rotates the middle ring section 2 along the X-axis direction and the Y-axis direction, and the error between the levelness of the middle ring section 2 and the levelness of the stern ring section 1 is not more than +/-1 mm.
As shown in fig. 6, when the intermediate ring segment 2 rotates in the X-axis direction, the adjusting trolley 3 on the starboard side is used as a rotation center 4, so that the adjusting trolley 3 on the starboard side of the intermediate ring segment 2 is lifted up, and the intermediate ring segment 2 rotates around the X-axis by a specified angle.
The centerline adjustment is: the adjusting trolley 3 firstly rotates the middle ring section 2 along the Z axis, then moves the middle ring section 2 along the Y axis, and enables the central line of the middle ring section 2 to be overlapped with the central line of the stern ring section 1.
As shown in fig. 5, when the intermediate ring segment 2 rotates along the Z axis, a certain point on an extension line of the adjustment trolley 3 in the middle of the intermediate ring segment 2 is taken as a rotation center 4, and then the adjustment trolley 3 at one end of the intermediate ring segment 2 translates along one side of the horizontal direction, and the adjustment trolley 3 at the other end translates along the other side of the horizontal direction.
As shown in fig. 2, the intermediate ring segment 2 moves along the Y-axis, and all the adjustment carriages 3 move in the width direction of the intermediate ring segment 2.
Therefore, the adjusting trolley 3 below the middle ring segment 2 can support and move the middle ring segment 2, and can rotate in the directions of an X axis, a Y axis and a Z axis by matching with the movement or jacking of different adjusting trolleys 3 at different positions so as to adjust the levelness and the center line of the whole middle ring segment 2.
In one embodiment of the present invention, the step S400 includes the steps of:
step S410, the adjusting trolley 3 pre-folds the middle ring segment 2 along the X-axis direction, and the movement error of the adjusting trolley 3 is determined;
step S420, the adjusting trolley 3 moves the middle ring segment 2 for a first distance along the X-axis direction each time until the gap of the closure opening is not more than a second distance, measures the actual moving distance after each movement, comprehensively analyzes the moving error of multiple movements, and determines the movement compensation amount;
step S430, checking the levelness and the center line of the middle ring segment 2, and ensuring that the levelness and the center line are within a tolerance range;
step S440, measuring the gap of the closure opening, and determining the final closure movement distance to be accurate to 1 mm;
and S450, releasing the movement compensation amount according to the movement distance of final folding, moving the middle ring segment 2 in place once by the adjusting trolley 3, checking the gap of the folding opening, and welding the folding opening.
By setting the pre-folding step, the movement error of the adjusting trolley 3 can be accurately found out, so that the accurate movement compensation amount is obtained, an accurate data base is provided for subsequent final folding, and the final folding precision is ensured.
The folding opening is the position between the middle ring section 2 and the stern ring section 1, and the folding opening gap is the distance between the middle ring section 2 and the stern ring section 1.
In this embodiment, the step S410 includes the following steps:
step S411, the adjusting trolley 3 moves the middle ring segment 2 close to the stern ring segment 1 along an X axis for each time by the first distance, measures an actual walking distance after each time of movement is finished, and grasps the moving error of the adjusting trolley 3 until the closure gap is not larger than the second distance;
step S412, checking the levelness and the center line of the middle ring segment 2, and ensuring that the levelness and the center line are within a tolerance range;
step S413, the adjusting trolley 3 enables the middle ring segment 2 to continuously approach the stern ring segment 1 along the X axis until the gap of the folding opening is not larger than a third distance;
step S414, the adjusting trolley 3 moves the middle ring segment 2 along the Z axis, so that the central line of the middle ring segment 2 is staggered with the central line of the stern ring segment 1;
step S415, determining the end surface allowance of the middle ring segment 2, and trimming the allowance;
step S416, the adjusting trolley 3 moves the middle ring segment 2 along the Z axis, so that the central line of the middle ring segment 2 is superposed with the central line of the stern ring segment 1;
step S417, the adjusting trolley 3 moves the middle ring segment 2 away from the stern ring segment 1 along the X axis, so that the gap of the folding opening is 2 m.
By setting the movement of the pre-folding and the final folding to be the same first distance, the movement compensation amount calculated by the movement error of the pre-folding can be ensured to be applied to the final folding, and the precision of the final folding is further ensured.
In this embodiment, the first distance is 500mm, the second distance is 500mm, and the third distance is 50 mm.
In another embodiment of the present invention, the step S414 is: and the adjusting trolley 3 moves the middle ring section 2 upwards along the Z axis, so that the central line of the middle ring section 2 and the central line of the stern ring section 1 are staggered by 5 mm.
In other embodiments, the step S414 is: and the adjusting trolley 3 moves the middle ring section 2 downwards along the Z axis, so that the central line of the middle ring section 2 and the central line of the stern ring section 1 are staggered by 5 mm.
The center line is arranged in a staggered mode so as to accurately draw allowance and cut allowance in the pre-folding stage.
In a specific embodiment of the present invention, the method for closing and positioning the large-sized ring-shaped total segment comprises the following steps:
step S10, adjusting the trolley 3 to lift the middle ring segment 2 to 100mm above the ground, removing the outer plate support and the ship bottom linear blocks which block the displacement, and reducing other blocks by 20-50 mm to avoid the middle ring segment 2 from sitting on the blocks in advance;
step S20, the adjusting trolley 3 rotates the middle ring segment 2 along the X axis and the Y axis to adjust the levelness of the middle ring segment 2;
step S30, the adjusting trolley 3 rotates the middle ring segment 2 along the Z axis and translates the middle ring segment 2 along the Y axis to adjust the central line of the middle ring segment 2;
step S40, adjusting the trolley 3 to translate the middle ring segment 2 in the X direction, moving the middle ring segment 2 close to the stern ring segment 1, walking for 500mm each time, measuring the actual walking distance after the walking for each time is finished, and mastering the walking error value until the walking reaches about 500mm of the closing opening gap;
step S50, checking to ensure that the center line and the levelness are in a tolerance range; checking the distances among the hull structure, the outfitting piece and the scaffold at the closure opening to ensure that the middle ring segment 2 cannot be collided after being closed;
step S60, walking to the final step until the gap of the closing opening is about 50mm, and after rechecking again to ensure that the central line and the levelness are within the tolerance range, reducing the middle ring segment 2 to be about 5mm higher than the stern ring segment 1;
step S70, determining the end face allowance through the inspection line, the folding opening gap and the like, and performing local allowance trimming; simultaneously, the wood blocks in the flat-bottom area of the ring section in the middle section are tightened, and the high-position support of the outer plate is put in place;
step S80, after the allowance trimming is finished, the middle ring segment 2 is jacked up by 50mm by the adjusting trolley 3, and then the adjusting trolley 3 reversely travels until the gap of the closing opening is about 2 m;
s90, adjusting the trolley 3 to walk, enabling the middle ring segment 2 to approach the stern ring segment 1 again, walking 500mm each time until the third time of walking to the gap of the closing opening is about 500mm, measuring the actual walking distance after the walking of each time is finished, comprehensively analyzing the walking error of the three times, and taking a reasonable value as the walking compensation amount;
s100, rechecking to ensure that the central line and the horizontal value are within a tolerance range, comprehensively measuring the gap of a closure opening, and determining the walking distance of the last step to be accurate to 1mm after considering the gap of a groove;
step S110, after the walking compensation amount is released according to the determined walking distance, finally commanding the adjusting trolley 3 to walk to translate the middle ring segment 2 to the right position in one step, checking the gap of the closing opening, and repeating the steps S80 to step 110 if the gap is out of tolerance;
step S120, if the gap of the folding opening meets the requirement, the middle ring segment 2 is lowered to sit on the pier, all the piers are tightened, the high-position support is tightened, then the trolley 3 is adjusted to unload about 2/3, and the positioning data is reviewed and recorded;
s130, sintering a shoulder row at a folding opening and positioning welding;
and step S140, unloading the adjusting trolley 3.
In the description herein, it is to be understood that the terms "upper" and the like are based on the orientation or positional relationship shown in the drawings, which are for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
In the description herein, references to the term "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (9)

1. A large annular total segment folding and positioning method is characterized by comprising the following steps:
s100, providing a stern ring segment and a middle ring segment of a ship, and building the stern ring segment and the middle ring segment at a set distance;
s200, after the stern ring segment and the middle ring segment are built, fixing the stern ring segment, and arranging a plurality of adjusting trolleys below the middle ring segment;
step S300, starting a plurality of adjusting trolleys to sequentially carry out jacking operation, horizontal adjustment and center line adjustment on the middle ring segment so as to enable the middle ring segment to be located at a first folding position;
step S400, starting the plurality of adjusting trolleys to enable the middle ring section to move towards the stern ring section so as to enable the middle ring section to be located at a second folding position and folded with the stern ring section;
the step S400 includes the steps of:
s410, pre-closing the middle ring segment along the X-axis direction by the adjusting trolley, and determining the movement error of the adjusting trolley;
step S420, the adjusting trolley moves the middle ring segment for a first distance along the X-axis direction each time until the gap of a closure opening is not more than a second distance, the actual moving distance is measured after each movement, the moving errors of multiple movements are comprehensively analyzed, and the movement compensation amount is determined;
step S430, checking the levelness and the center line of the middle ring segment, and ensuring that the levelness and the center line are within a tolerance range;
step S440, measuring the gap of the closure opening, and determining the final closure movement distance to be accurate to 1 mm;
and S450, releasing the movement compensation amount according to the movement distance of final folding, moving the middle ring segment to the right position once by the adjusting trolley, checking the gap of the folding opening, and welding the folding opening.
2. The large-scale annular total section folding and positioning method according to claim 1, wherein the jacking operation is as follows: and the middle ring section is jacked up along the Z-axis direction by the adjusting trolley until the distance between the middle ring section and the ground is about 100mm, and the outer plate support and the ship bottom linear pier wood which block displacement are removed.
3. The method for folding and positioning the large-scale annular total section according to claim 2, wherein the rest of the blocks of the middle ring section are lowered by a distance of 20-50 mm before the displacement blocking planking supports and the ship bottom linear blocks are removed.
4. The large ring-shaped total segment folding and positioning method according to claim 1, wherein the horizontal adjustment is as follows: the adjusting trolley rotates the middle ring section along the X-axis direction and the Y-axis direction respectively, and the error between the levelness of the middle ring section and the levelness of the stern ring section is not more than +/-1 mm.
5. The method for closing and positioning the large-scale annular total segment according to claim 1, wherein the center line is adjusted to: the adjusting trolley firstly rotates the middle ring section along the Z axis, then moves the middle ring section along the Y axis, and enables the central line of the middle ring section to be overlapped with the central line of the stern ring section.
6. The method for folding and positioning the large-scale annular total segment according to claim 1, wherein the step S410 comprises the following steps:
s411, enabling the middle ring segment to be close to the stern ring segment along an X axis by the adjusting trolley, moving the middle ring segment for each time by the first distance, measuring an actual walking distance after each movement is finished, and mastering the moving error of the adjusting trolley until the folding opening gap is not larger than the second distance;
step S412, checking the levelness and the center line of the middle ring segment, and ensuring that the levelness and the center line are within a tolerance range;
step S413, the adjusting trolley enables the middle ring segment to continuously approach the stern ring segment along the X axis until the folding opening gap is not larger than a third distance;
step S414, the middle ring segment is moved along the Z axis by the adjusting trolley, so that the central line of the middle ring segment is staggered with the central line of the stern ring segment;
step S415, determining the end face allowance of the middle ring segment, and trimming the allowance;
step S416, the middle ring section is moved along the Z axis by the adjusting trolley, so that the central line of the middle ring section is superposed with the central line of the stern ring section;
and S417, moving the middle ring section away from the stern ring section along the X axis by the adjusting trolley to enable the closing opening gap to be 2 m.
7. The method as claimed in claim 6, wherein the first distance is 500mm, the second distance is 500mm, and the third distance is 50 mm.
8. The method for folding and positioning the large-scale annular total segment according to claim 6, wherein the step S414 is: and the middle ring section is moved upwards along the Z axis by the adjusting trolley, so that the central line of the middle ring section and the central line of the stern ring section are staggered by 5 mm.
9. The method for folding and positioning the large-scale annular total segment according to claim 6, wherein the step S414 is: and the middle ring section moves downwards along the Z-axis by the adjusting trolley, so that the central line of the middle ring section and the central line of the stern ring section are staggered by 5 mm.
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CN111776163B (en) * 2020-05-15 2021-07-20 上海江南长兴造船有限责任公司 Positioning method for half ship and block water gap butt joint
CN113665762B (en) * 2021-09-28 2022-09-09 广州黄船海洋工程有限公司 Method for building annular block of branch line container ship

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Application publication date: 20181109

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Denomination of invention: A closing and positioning method for large annular total section

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