CN117415572B - Pile fixing frame manufacturing process suitable for self-elevating platform ship - Google Patents
Pile fixing frame manufacturing process suitable for self-elevating platform ship Download PDFInfo
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- CN117415572B CN117415572B CN202311747013.0A CN202311747013A CN117415572B CN 117415572 B CN117415572 B CN 117415572B CN 202311747013 A CN202311747013 A CN 202311747013A CN 117415572 B CN117415572 B CN 117415572B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000003466 welding Methods 0.000 claims abstract description 204
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000003754 machining Methods 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims description 97
- 238000007789 sealing Methods 0.000 claims description 63
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 36
- 238000005520 cutting process Methods 0.000 claims description 30
- 230000003014 reinforcing effect Effects 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 18
- 239000001569 carbon dioxide Substances 0.000 claims description 18
- 230000032683 aging Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000035882 stress Effects 0.000 claims description 12
- 238000007747 plating Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 7
- 230000008439 repair process Effects 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims 1
- 238000013461 design Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
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- 238000011105 stabilization Methods 0.000 description 2
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the technical field of self-elevating platform ship manufacturing, in particular to a pile fixing frame manufacturing process suitable for a self-elevating platform ship. The pile fixing frame is formed by assembling and welding a middle base plate, an upper box body and a lower box body. In actual production, the middle base plate, the upper box body and the lower box body are respectively and independently welded and formed, and the upper box body and the lower box body in the assembly process are respectively based on the middle base plate, so that on one hand, most of welding working quantity is advanced to the independent forming working procedures of the middle base plate, the upper box body and the lower box body, and the control of welding deformation quantity is realized in stages; on the other hand, in the assembly process, the alignment precision among the upper blank mounting holes, the lower blank mounting holes and the middle blank mounting holes is used as a basis for fine adjustment of the relative positions of the upper box body and the lower box body, and after the pile fixing frame is welded and aged, the upper mounting holes, the middle mounting holes and the lower mounting holes with good coaxiality are finally formed in a machining mode.
Description
Technical Field
The invention relates to the technical field of self-elevating platform ship manufacturing, in particular to a pile fixing frame manufacturing process suitable for a self-elevating platform ship.
Background
The self-elevating platform ship consists of main deck, upper structure, pile leg and other parts. Wherein the superstructure is a relatively buoyant barge-shaped buoyant body for carrying the lifting machinery. In practical application, the upper structure can be lifted by means of the pile legs to adapt to different working water depth requirements. The jacking system of the self-elevating platform ship mainly comprises a pile fixing frame, pile legs, a driving device and the like. When the self-elevating wind power installation platform moves to a designated position, the driving device is started to drive the pile legs to execute downward extending movement along the pile fixing frame until the pile legs are propped against the seabed, so that the upper structure is completely or partially exposed out of the water surface, and the main deck serving as a working site is ensured to be free from the influence of waves.
The pile fixing frame is an important component part in a lifting system of the self-elevating platform ship, the pile fixing frame is required to bear the mechanical structure of a heavy-duty large marine device in the actual working process, and the strength characteristic of the pile fixing frame has an extremely important influence on the overall safety of the self-elevating platform ship. The pile fixing frame is mostly of a box type structure and mainly comprises a main box body, and a middle plate, a partition plate and a reinforcing rib plate welded in the main box body. The front and rear side walls of the main case and the middle plate are formed with process mounting holes for mounting the motor driving device. In the current state of manufacture, the pile fixing frame is formed by adopting a traditional splice welding mode, namely, a three-face structure (cover plate rear seal) of the main box body is formed by welding preferentially, then a line is drawn on the inner side wall of the main box body according to a design blueprint to be used as a positioning adjustment reference of auxiliary parts such as a follow-up middle plate, a baffle plate and reinforcing ribs, and finally the welding action of the cover plate is completed after the middle plate, the baffle plate and the reinforcing ribs are welded in place. On the one hand, the inner cavity of the main box body is deeper (about 2 m), the arm of the welding robot is difficult to reach, the automatic welding line is not realistic, and a great amount of work is required to be finished when a welder enters the main box body, the working environment is severe, the welding quality is difficult to guarantee due to the limitation of the body accommodating space; on the other hand, in the blanking stage, the process mounting holes are cut and formed on the side plates of the main box body in advance, and welding deformation phenomena (including telescopic deformation and torsional deformation) tend to occur on the pile fixing frame due to the influence of heat supply after welding, so that the coaxiality of the process mounting holes formed on the middle plate is difficult to ensure and is usually adjusted by means of integral initiating explosive device correction, initiating explosive device repair or repair welding and the like, the operation is time-consuming and labor-consuming, and the complaints of the shipmen and the supervision are continuous; on the other hand, in the actual welding process, in order to ensure strict reinforcement, the partition plate and the reinforcing ribs are often required to be cut by a fire machine, so that the total time is consumed longer, the forming quality of the pile fixing frame is further affected, and the total engineering process is further delayed. Thus, a technician is required to solve the above problems.
Disclosure of Invention
Therefore, in view of the above-mentioned existing problems and drawbacks, the project group of the present invention gathers related data, and through evaluation and consideration of multiple parties, and continuous experiments and modification by project group personnel, the pile fixing frame manufacturing process suitable for the jack-up platform ship is finally caused.
In order to solve the technical problems, the invention relates to a pile fixing frame manufacturing process suitable for a self-elevating platform ship, wherein the pile fixing frame is matched with a pile leg and is driven by a rack and a plurality of power subunits in a cooperative manner, and the self-elevating platform ship can be separated from the sea surface. The pile fixing frame is formed by assembling and welding a middle base plate, an upper box body and a lower box body. The middle base plate, the upper box body and the lower box body are respectively formed with a middle mounting hole, an upper mounting hole and a lower mounting hole. The middle mounting hole, the upper mounting hole and the lower mounting hole are matched with each other to position and mount the power subunit;
the pile fixing frame manufacturing process suitable for the self-elevating platform ship comprises the following steps of:
s1, prefabricating a middle-arranged substrate;
the middle substrate comprises a middle main board, a front epitaxial board, a rear epitaxial board and an 8-shaped board which are welded into a whole;
prefabricating the middle-arranged substrate comprises the following substeps:
S11, a numerical control blanking stage;
cutting and forming a middle main board, a front epitaxial board, a rear epitaxial board and an 8-shaped board in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
in the process of forming the 8-shaped plate, a middle blank mounting hole is cut on the middle plate, machining allowance which is not smaller than 6mm is reserved on a single side of the inner edge of the middle blank mounting hole, and a plurality of 8-shaped through holes for embedding the 8-shaped plate are cut on the middle main plate;
s12, a plating stage;
sequentially tiling the middle main board, the front epitaxial board, the rear epitaxial board and the 8-shaped board on a welding workbench;
s13, intermittent welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship among the middle main board, the front epitaxial board, the rear epitaxial board and the 8-shaped board;
s14, welding and forming;
forming a middle-set substrate by means of submerged arc welding in a final welding mode, wherein the middle-set substrate is subjected to at least one 180-degree turn-over operation;
s2, prefabricating an upper box body;
the upper box body comprises a cover plate, an upper left wing plate, an upper right wing plate, an upper front sealing plate, an upper rear sealing plate, an upper transverse partition plate and an upper longitudinal partition plate which are welded into a whole;
The pre-preparing the upper box body comprises the following substeps:
s21, a numerical control blanking stage;
cutting and forming a cover plate, an upper left wing plate, an upper right wing plate, an upper front sealing plate, an upper rear sealing plate, an upper transverse partition plate and an upper longitudinal partition plate in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
cutting a plurality of overhead blank mounting holes on the cover plate, and reserving machining allowance which is not smaller than 5m on a single side;
s22, a plating stage, which comprises the following substeps;
s221, flatly paving the cover plate on a welding workbench;
s222, drawing an upper positioning datum line set on the cover plate;
s223, sequentially placing an upper transverse partition plate, an upper longitudinal partition plate, an upper left wing plate, an upper right wing plate, an upper front sealing plate and an upper rear sealing plate, and finely adjusting the relative positions of the upper transverse partition plate, the upper longitudinal partition plate, the upper left wing plate, the upper right wing plate and the upper front sealing plate by taking an upper positioning datum line set as a datum;
s23, intermittent welding positioning stage;
the worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship of the cover plate, the upper left wing plate, the upper right wing plate, the upper front sealing plate, the upper rear sealing plate, the upper transverse partition plate and the upper longitudinal partition plate;
s24, welding and forming;
Forming the overhead tank by means of an automatic welding robot to finally weld;
s25, performing aging treatment on the upper box body by means of an aging vibration platform so as to eliminate internal stress of the upper box body;
s3, prefabricating a lower box body;
the lower box body is composed of 2 lower sub-box bodies which are symmetrically arranged along the width direction of the middle base plate and are welded independently with the middle base plate;
the lower sub-box body comprises a bottom plate, a lower wing plate, a lower front sealing plate, a lower rear sealing plate, a lower transverse partition plate, a lower longitudinal partition plate and a weight plate which are welded into a whole;
the prefabricated lower sub-box body comprises the following steps:
s31, a numerical control blanking stage;
cutting and forming a bottom plate, a lower wing plate, a lower front sealing plate, a lower rear sealing plate, a lower transverse baffle, a lower longitudinal baffle and a heavy plate in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
cutting a lower blank mounting hole on a heavy plate in the process of executing numerical control flame cutting, leaving machining allowance which is not smaller than 6mm on a single side of the inner edge of the lower blank mounting hole, and cutting and forming a plurality of non-full-sealing through holes for embedding the heavy plate on a bottom plate;
s32, a plating stage, which comprises the following substeps;
S221, flatly laying the bottom plate on a welding workbench;
s222, drawing a lower positioning datum line set on the bottom plate;
s223, sequentially placing a lower wing plate, a lower front sealing plate, a lower rear sealing plate, a lower transverse partition plate, a lower longitudinal partition plate and a heavy weight plate, and finely adjusting the relative positions of the lower wing plate, the lower front sealing plate, the lower rear sealing plate and the lower longitudinal partition plate by taking a lower positioning datum line set as a datum;
s33, a discontinuous welding positioning stage;
the workers apply intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship of the lower wing plate, the lower front sealing plate, the lower rear sealing plate, the lower transverse partition plate, the lower longitudinal partition plate and the heavy weight plate;
s34, welding and forming;
forming a lower sub-box by means of an automatic welding robot by final welding;
s35, performing aging treatment on the lower sub-box body by means of an aging vibration platform so as to eliminate internal stress of the lower sub-box body;
s4, a pile fixing frame assembly welding stage, which comprises the following substeps:
s41, placing the middle substrate on a welding workbench;
s42, placing the upper box body on the middle-placed base plate, and finely adjusting the relative positions of the upper box body until the alignment precision between each upper blank mounting hole and the corresponding middle-placed blank mounting hole is controlled within an allowable value range;
S43, performing intermittent welding operation by workers by means of carbon dioxide gas shielded welding to fix the relative position relationship between the upper box body and the middle base plate;
s44, integrally overturning the middle base plate and the upper box body by 180 degrees;
s45, respectively placing the 2 lower sub-boxes on the middle base plate, and finely adjusting the relative positions of the lower sub-boxes until the alignment precision between each lower blank mounting hole and the corresponding middle blank mounting hole, the alignment precision between each lower transverse baffle and the upper transverse baffle opposite to the lower transverse baffle and the alignment precision between each lower longitudinal baffle and the upper longitudinal baffle opposite to the lower longitudinal baffle are controlled within an allowable value range;
s46, a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relation between each lower sub-box body and the middle base plate, and the pile fixing frame is initially assembled;
s47, transferring the preliminarily assembled pile fixing frame into a welding workshop, completing a main welding seam welding operation on the pile fixing frame by means of an automatic welding production line, and completing repair welding operation of hidden welding seams or welding missing sections in cavities of an upper box body and a lower sub box body by means of carbon dioxide gas shielded welding by workers;
S5, a post-welding heat treatment stage is carried out to remove residual welding stress in the pile fixing frame;
s6, machining;
and (3) boring the blank by means of a movable boring machine so as to sequentially mill reserved unilateral machining allowance of the inner edges of the upper blank mounting hole, the middle blank mounting hole and the lower blank mounting hole, and the coaxiality of the formed upper mounting hole, middle mounting hole and lower mounting hole is controlled within a quality inspection standard.
As a further improvement of the technical scheme disclosed by the invention, in step S11, after the numerical control flame cutting operation is finished, at least 15mm of cutting allowance is left in the front epitaxial plate and the rear epitaxial plate along the length direction of the numerical control flame cutting operation.
As a further improvement of the technical scheme disclosed by the invention, in step S1, after the middle substrate is prefabricated, a middle cross positioning datum line is drawn on the middle substrate, and a front welding precision control datum line and a rear welding precision control datum line are drawn on the front epitaxial plate and the rear epitaxial plate in one-to-one correspondence respectively. And when the operation of placing each 8-shaped plate is executed, the middle cross positioning datum line is used as a positioning datum.
As a further improvement of the disclosed solution, in step S24, neither the upper transverse partition nor the upper longitudinal partition is fully welded, and the upper transverse partition is temporarily not welded by a length of at least 30cm from the bottom side thereof to the upper side. In step S34, neither the underlying transverse separator nor the underlying longitudinal separator are fully welded, and are temporarily unwelded by a length of at least 30cm from the top end face thereof downward.
As a further improvement of the technical scheme disclosed by the invention, the upper box body further comprises an upper auxiliary reinforcing rib plate. The lower sub-box body also comprises a lower auxiliary reinforcing rib plate. The upper auxiliary reinforcing rib plates and the lower auxiliary reinforcing rib plates are welded in the cavities of the upper box body and the lower sub box body in a one-to-one correspondence mode respectively. After the pile fixing frame is assembled and welded, the upper auxiliary reinforcing rib plate and the lower auxiliary reinforcing rib plate are welded with the front side and the back side of the middle main board respectively, the opposite ribs are kept, and the upper auxiliary reinforcing rib plate and the lower auxiliary reinforcing rib plate are opposite to the waist area of the 8-shaped board.
As a further improvement of the disclosed technical solution, in step S47, the automated welding line is composed of a left-hand welding robot and a right-hand welding robot symmetrically arranged on the left and right sides of the pile holder. In the actual welding process, the welding actions of the left welding robot and the right welding robot are kept synchronous, and the welding speeds are kept consistent.
As a further improvement of the disclosed technical solution, step S5 comprises the following sub-steps:
s51, heating the pile fixing frame by means of electric heating. A plurality of thermocouples are uniformly distributed on the pile fixing frame at the position close to the main welding line;
S52, wrapping heat-insulating asbestos around the pile fixing frame along the main welding line so that each thermocouple is fully covered;
s53, in the heating stage, the heating rate is controlled to be 80-120 ℃/hr, the annealing temperature is controlled to be 280-300 ℃, and the total duration is 2.5-3 h.
The design structure of the pile fixing frame is optimized and improved, and the main body of the pile fixing frame is formed by splicing and welding a middle base plate, an upper box body and a lower box body. And the manufacturing process flow of the pile fixing frame is optimized and improved, so that the middle base plate, the upper box body and the lower box body can be independently welded and formed in the actual manufacturing process, and then the pile fixing frame is assembled and welded to finally form the pile fixing frame.
In practical application, the pile fixing frame manufacturing process suitable for the self-elevating platform ship disclosed by the invention has the following technical effects:
1) The middle base plate, the upper box body and the lower box body are welded independently in different places, and the upper box body and the lower box body in the subsequent assembly process take the middle base plate as the assembly and welding basis, so that most of welding working quantity is advanced to the independent forming working procedures of the middle base plate, the upper box body and the lower box body, thereby being beneficial to controlling welding deformation in stages, greatly reducing welding quantity after assembly and further being beneficial to controlling welding deformation of the pile fixing frame within a reasonable value range (especially the expansion quantity and the integral torsion degree in the length direction);
2) When the upper box body and the lower box body are assembled, the alignment precision between the upper blank mounting hole and the middle blank mounting hole is preferentially used as the basis for fine adjustment of the relative position of the upper box body, and the alignment precision between the lower blank mounting hole and the middle blank mounting hole is used as the basis for fine adjustment of the relative position of each lower sub box body, so that good coaxiality among the upper blank mounting hole, the middle blank mounting hole and the lower blank mounting hole is maintained after the pile fixing frame is welded;
3) After the pile fixing frame is welded and subjected to aging stabilization treatment, boring is carried out on the pile fixing frame by means of a movable boring machine so as to form an upper mounting hole, a middle mounting hole and a lower mounting hole on the basis of the upper mounting hole, the middle mounting hole and the lower mounting hole, the coaxiality of the upper mounting hole, the middle mounting hole and the lower mounting hole is ensured, and after the pile fixing frame is subjected to aging treatment, the internal stress of the pile fixing frame is fully released, so that the coaxiality among the upper mounting hole, the middle mounting hole and the lower mounting hole is ensured to still meet the installation acceptance criterion in a subsequent quite long period;
4) Compared with the traditional integrated splice welding structure, the depth value of the inner cavity of the upper box body or the lower box body is greatly reduced (less than 1 m), so that an automatic welding robot arm can reach a pre-welding area, and the application of an automatic welding line is facilitated, the manufacturing efficiency can be effectively improved, the total construction period can be effectively shortened, and the welding line forming quality can be ensured;
5) The upper box body and the lower box body in the subsequent assembling process take the middle base plate as an assembling and welding foundation, so that the integral reinforcement control of the internal structure of the pile fixing frame is ensured to be within the blueprint acceptance standard, the initiating explosive device operation workload is greatly reduced, and the total engineering progress is accelerated.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a concrete application state of the pile fixing frame disclosed by the invention.
Fig. 2 is a schematic perspective view of a pile holder according to the present invention.
Fig. 3 is an exploded view of the pile holder of the present invention.
Fig. 4 is a schematic perspective view of a centrally disposed base plate in a pile holder according to the present invention.
Fig. 5 is a schematic perspective view of a central main board in a pile fixing frame according to the present invention.
Fig. 6 is a schematic perspective view of an 8-shaped plate in the pile fixing frame disclosed by the invention.
Fig. 7 is a schematic perspective view of an overhead box in a pile holder according to the present invention.
Fig. 8 is a schematic perspective view of an upper casing (with a cover removed) in the pile fixing frame according to the present invention.
Fig. 9 is a schematic perspective view of a cover plate in a pile holder according to the present invention.
Fig. 10 is a schematic perspective view of a lower sub-box in a pile holder according to the present invention.
Fig. 11 is a schematic perspective view of a bottom plate in a pile holder according to the present invention.
Fig. 12 is a schematic perspective view of a weight plate in the pile holder of the present invention.
Fig. 13 is a schematic layout view of an automated welding line for pile holders in accordance with the present disclosure.
1-arranging a substrate in the middle; 11-a middle main board; 111-8-shaped through holes; 112-a cross positioning datum line; 12-a front-end epitaxial plate; 121-prepositioning a welding precision control datum line; 13-a rear epitaxial plate; 131-postposition of a welding precision control datum line; 14-8 shaped plates; 141-a middle blank mounting hole; 142-a centrally installed mounting hole; 2-an upper box body; 21-cover plate; 211-placing blank mounting holes; 212-upper mounting holes; 22-upper left wing plate; 23-upper right wing plate; 24-upper front sealing plate; 25-upper rear sealing plate; 26-upper transverse partition; 27-upper longitudinal baffles; 28-upper auxiliary reinforcing rib plates; 3-placing a box body downwards; 31-placing a sub-box body downwards; 311-bottom plate; 3111-non-fully sealed through holes; 312-lower wing plate; 313-lower front seal plate; 314-lower rear seal plate; 315-arranging a transverse partition board; 316-underlying longitudinal baffles; 317-weight plate; 3171-placing a blank mounting hole; 3172-lower mounting holes; 318-arranging an auxiliary reinforcing rib plate.
Description of the embodiments
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "upper", "lower", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The present disclosure is further described in detail below in connection with specific examples. Fig. 1 shows a schematic view of a specific application state of the pile fixing frame disclosed by the invention, and it can be known that the pile fixing frame is matched with a pile leg and is driven cooperatively by a rack and a plurality of power subunits. When the self-elevating platform ship is required to be changed from a floating state to a positioning state, the power subunits are synchronously started, and the spud leg performs downward movement under the action of rack driving force until the lower free end of the spud leg is in contact with the seabed. When the self-elevating platform ship is required to be converted from a positioning state to a floating state, the power subunits are started again, the pile legs execute upward movement under the action of reverse driving force of the racks until the lower free ends of the pile legs are separated from the seabed.
Fig. 2 and 3 show a perspective view and an exploded view of the pile fixing frame according to the present invention, respectively, and it can be seen that the pile fixing frame is formed by butt welding three parts of a middle base plate 1, an upper box 2 and a lower box 3. Wherein, the middle substrate 1, the upper case 2 and the lower case 3 are respectively formed with a middle mounting hole 142, an upper mounting hole 212 and a lower mounting hole 3172. The power subunit mainly comprises a motor, a reduction gearbox, a gear transmission mechanism and the like. The middle mounting hole 142, the upper mounting hole 212 and the lower mounting hole 3172 are matched so that the gear transmission mechanism can be accurately assembled with the pile fixing frame.
In this application, the specific design structures of the middle substrate 1, the upper box 2 and the lower box 3 are greatly optimized and improved, and the specific embodiments are as follows:
as shown in fig. 4, the middle substrate 1 mainly comprises a middle main board 11, a front epitaxial board 12, a rear epitaxial board 13, an 8-shaped board 14 and the like, and is welded into a whole according to an engineering blueprint or a specific manufacturing process file in actual production. As shown in fig. 6, in the course of blanking the molded 8-shaped plate 14, a center blank mounting hole 141 is cut thereon, and a machining allowance of not less than 6mm is left on one side of its inner edge (for subsequent machining of a bore hole to finally mold a center mounting hole 142 as a mat). In order to facilitate the embedding of the 8-shaped plate 14, a plurality of 8-shaped through holes 111 (as shown in fig. 5) are correspondingly cut in the middle main board 11 during the blanking process.
As shown in fig. 7 and 8, the upper case 2 is mainly composed of a cover plate 21, an upper left wing plate 22, an upper right wing plate 23, an upper front sealing plate 24, an upper rear sealing plate 25, an upper transverse partition 26, an upper longitudinal partition 27, and the like, and is welded into a whole according to a blueprint or a specific manufacturing process file in actual production. As shown in fig. 9, a plurality of upper blank mounting holes 211 are cut in the cover plate 21, and a machining allowance of not less than 5m is left on one side (for subsequent machining of a bore hole to finally form an upper mounting hole 212 for laying).
Referring to fig. 2 and 3, the lower case 3 is composed of 2 lower sub-cases 31 which are symmetrically arranged along the width direction of the middle substrate 1, mirror-image in design structure, and welded independently of the middle substrate 1. As shown in fig. 10, the lower sub-box 31 is mainly composed of a bottom plate 311, a lower wing plate 312, a lower front sealing plate 313, a lower rear sealing plate 314, a lower transverse partition 315, a lower longitudinal partition 316, a heavy weight plate 317 and the like, and is welded into a whole according to an engineering blueprint or a specific manufacturing process file in actual production. As shown in fig. 11, in the course of performing the numerical control flame cutting, the under-placed blank mounting hole 3171 is cut on the weight plate 317 with a machining allowance of not less than 6mm left on one side of the inner edge thereof (for subsequent machining of the bore hole to finally form the under-placed mounting hole 3172 as a mat). As shown in fig. 12, a plurality of non-fully sealed through holes 3111 are cut into the base plate 311 for embedding and mounting the weight plate 317.
In this application, a pile fixing frame manufacturing process suitable for a jack-up platform ship is also disclosed, including the following steps:
s1, prefabricating a middle-arranged substrate 1, which comprises the following substeps:
s11, a numerical control blanking stage;
cutting and forming a central main board 11, a front epitaxial board 12, a rear epitaxial board 13 and an 8-shaped board 14 respectively in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
s12, a plating stage;
the middle main board 11, the front extension board 12, the rear extension board 13 and the 8-shaped board 14 are paved on a welding workbench according to the requirements of a construction blueprint or specific manufacturing process files;
s13, intermittent welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative positional relationship among the central main board 11, the front epitaxial board 12, the rear epitaxial board 13 and the 8-shaped board 14;
s14, welding and forming;
forming the mid-set baseplate 1 by means of semi-automatic submerged arc welding with final application, during which it undergoes at least one 180 ° turn-over operation;
s2, prefabricating an upper box body 2, which comprises the following substeps:
s21, a numerical control blanking stage;
a cover plate 21, an upper left wing plate 22, an upper right wing plate 23, an upper front sealing plate 24, an upper rear sealing plate 25, an upper transverse partition plate 26 and an upper longitudinal partition plate 27 are respectively cut and formed in a numerical control workshop by means of a numerical control flame straight bar cutting machine;
S22, a plating stage, which comprises the following substeps;
s221, flatly paving the cover plate 21 on a welding workbench;
s222, drawing an upper positioning datum line set (not shown in the figure) on the cover plate 21;
s223, sequentially placing the upper transverse partition plate 26, the upper longitudinal partition plate 27, the upper left wing plate 22, the upper right wing plate 23, the upper front sealing plate 24 and the upper rear sealing plate 25, and finely adjusting the relative positions of the upper transverse partition plate 26, the upper longitudinal partition plate 27, the upper left wing plate 23 and the upper right wing plate with the upper positioning datum line set as a datum;
s23, intermittent welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative positional relationship of the cover plate 21, the upper left wing plate 22, the upper right wing plate 23, the upper front sealing plate 24, the upper rear sealing plate 25, the upper transverse partition plate 26 and the upper longitudinal partition plate 27;
s24, welding and forming;
forming the overhead tank 2 by means of an automatic welding robot for final welding;
s25, performing aging treatment on the upper box body 2 by means of an aging vibration platform so as to eliminate internal stress of the upper box body;
s3, prefabricating the lower box body 3. As can be seen from the above description, the lower case 3 is composed of the lower sub-case 31 with 2 mirror image design structures.
The prefabricated lower sub-tank 31 comprises the steps of:
S31, a numerical control blanking stage;
a bottom plate 311, a lower wing plate 312, a lower front sealing plate 313, a lower rear sealing plate 314, a lower transverse partition 315, a lower longitudinal partition 316 and a weight plate 317 are respectively cut and formed in a numerical control workshop by means of a numerical control flame straight bar cutting machine;
s32, a plating stage, which comprises the following substeps;
s221, flatly laying the bottom plate 311 on a welding workbench;
s222, a lower positioning datum line set (not shown in the figure) is drawn on the bottom plate 311;
s223, sequentially placing the lower wing plate 312, the lower front sealing plate 313, the lower rear sealing plate 314, the lower transverse partition 315, the lower longitudinal partition 316 and the weight plate 317, and finely adjusting the relative positions of the lower wing plate 312, the lower front sealing plate 313, the lower transverse partition 315 and the lower longitudinal partition 316 by taking the lower positioning datum line set as a reference;
s33, a discontinuous welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative positional relationship of the lower wing plate 312, the lower front sealing plate 313, the lower rear sealing plate 314, the lower transverse partition 315, the lower longitudinal partition 316 and the weight plate 317;
s34, welding and forming;
forming the lower sub-tank 31 by means of an automatic welding robot to finally perform welding;
s35, performing aging treatment on the lower sub-box 31 by means of an aging vibration platform so as to eliminate internal stress of the lower sub-box;
S4, a pile fixing frame assembly welding stage, which comprises the following substeps:
s41, placing the middle substrate 1 on a welding workbench;
s42, placing the upper box body 2 on the middle-placed base plate 1, and finely adjusting the relative positions of the upper box body until the alignment precision between each upper blank mounting hole 211 and the corresponding middle-placed blank mounting hole 141 is controlled within an allowable value range;
s43, performing intermittent welding operation by workers by means of carbon dioxide gas shielded welding to fix the relative position relationship between the upper box body 2 and the middle base plate 1;
s44, integrally overturning the middle base plate 1 and the upper box body 2 by 180 degrees;
s45, respectively placing 2 lower sub-boxes 31 on the middle-set base plate 1, and finely adjusting the relative positions of the lower sub-boxes until the alignment precision between each lower blank mounting hole 3171 and the corresponding middle blank mounting hole 141, the alignment precision between each lower transverse partition 315 and the corresponding upper transverse partition 26, and the alignment precision between each lower longitudinal partition 316 and the corresponding upper longitudinal partition 27 are controlled within an allowable value range;
s46, a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship between each lower sub-box 31 and the middle base plate 1, and the pile fixing frame is initially assembled;
S47, transferring the preliminarily assembled pile fixing frame into a welding workshop, and completing the main welding seam welding operation on the pile fixing frame by means of an automatic welding production line. The automatic welding production line consists of a left welding robot and a right welding robot which are symmetrically arranged at the left side and the right side of the pile fixing frame. In the actual welding process, the welding actions of the left welding robot and the right welding robot are kept synchronous, and the welding speeds are kept consistent (as shown in fig. 13);
the workers finish repair welding operation of hidden welding seams or welding missing sections in the cavities of the upper box body 2 and the lower sub box body 31 by means of carbon dioxide gas shielded welding;
s5, a post-welding heat treatment stage for removing residual welding stress in the pile fixing frame, which specifically comprises the following sub-steps:
s51, heating the pile fixing frame by means of electric heating. A plurality of thermocouples are uniformly distributed on the pile fixing frame at the position close to the main welding line;
s52, wrapping heat-insulating asbestos around the pile fixing frame along the main welding line so that each thermocouple is fully covered;
s53, in the heating stage, the heating rate is controlled to be 80-120 ℃/hr, the annealing temperature is controlled to be 280-300 ℃, and the total duration is 2.5-3 hours;
it should be noted that, the main welding seam refers to a single-sided welding double-sided forming welding seam formed when the upper left wing plate 22, the upper right wing plate 23, the upper front sealing plate 24, the upper rear sealing plate 25, the upper longitudinal partition 27, the lower wing plate 312, the lower front sealing plate 313, the lower rear sealing plate 314, the lower longitudinal partition 316 and the middle main plate 11 are welded;
S6, machining;
boring operation is performed on the pile holder by means of a movable boring machine to sequentially mill reserved single-side machining allowance remained on the inner edges of the upper blank mounting hole 211, the middle blank mounting hole 141 and the lower blank mounting hole 3171, so that coaxiality of the formed upper mounting hole 212 (shown in fig. 9), the middle mounting hole 142 (shown in fig. 6) and the lower mounting hole 3172 (shown in fig. 12) is controlled to be within a quality inspection standard.
In the application, the design structure of the pile fixing frame is optimized and improved, and the pile fixing frame is formed by welding three parts of a middle base plate 1, an upper box body 2 and a lower box body 3. And the manufacturing process flow of the pile fixing frame is optimized and improved, so that the middle base plate 1, the upper box body 2 and the lower box body 3 can be independently welded and formed in the actual manufacturing process, and then the pile fixing frame is assembled and welded to finally form the pile fixing frame.
In practical application, the pile fixing frame manufacturing process suitable for the self-elevating platform ship disclosed by the invention has the following technical effects:
1) The middle base plate 1, the upper box body 2 and the lower box body 3 (consisting of two mutually independent lower sub-box bodies 31) are welded independently in different places, and the upper box body 2 and the lower box body 3 in the subsequent pairing process take the middle base plate 1 as a pairing and welding basis, so that most of the welding work amount is advanced to the independent forming working procedures of the middle base plate 1, the upper box body 2 and the lower box body 3, thereby being beneficial to controlling the welding deformation amount in stages, greatly reducing the welding amount after pairing and further being beneficial to controlling the welding deformation of the pile fixing frame within a reasonable value range (especially the expansion amount in the length direction and the integral torsion degree);
2) When the assembly operation is carried out on the upper box body 2 and the lower box body 3, the alignment precision between the upper blank mounting holes 211 and the middle blank mounting holes 141 is preferentially used as the basis for fine adjustment of the relative positions of the upper box body 2, and the alignment precision between the lower blank mounting holes 3171 and the middle blank mounting holes 141 is used as the basis for fine adjustment of the relative positions of the lower sub-box bodies 31, so that good coaxiality among the upper blank mounting holes 211, the middle blank mounting holes 141 and the lower blank mounting holes 3171 is maintained after the pile fixing frame is welded;
3) After the pile fixing frame is welded and subjected to aging stabilization treatment, boring is carried out on the pile fixing frame by means of a movable boring machine so as to form an upper mounting hole 212, a middle mounting hole 142 and a lower mounting hole 3172 on the basis of an upper blank mounting hole 211, a middle blank mounting hole 141 and a lower blank mounting hole 3171, the coaxiality of the upper mounting hole 212, the middle mounting hole 142 and the lower mounting hole 3172 is guaranteed, and after aging treatment of a manager, the internal stress of the pile fixing frame is fully released, so that the coaxiality of the upper mounting hole 212, the middle mounting hole 142 and the lower mounting hole 3172 is guaranteed to still meet the installation acceptance standard in a later quite long period;
4) Compared with the traditional integrated splice welding structure, the depth value of the inner cavity of the upper box body 2 or the lower box body 31 forming the lower box body 3 is greatly reduced (less than 1 m), so that the arm of an automatic welding robot can reach a pre-welding area, and the application of an automatic welding line is facilitated, the manufacturing efficiency can be effectively improved, the total construction period can be effectively shortened, and the welding line forming quality can be ensured;
Here, it should be further noted that, in the subsequent pairing process, the upper box body 2 and the lower box body 3 use the middle base plate 1 as a pairing and welding foundation, so that the whole reinforcement of the internal structure of the pile fixing frame is ensured to be controlled within the blueprint acceptance standard, the work load of initiating explosive device is greatly reduced, and the total engineering progress is accelerated.
As known, according to the tonnage of the jack-up platform ship, the length value of the pile fixing frame is different, and in some cases, when the design length of the pile fixing frame exceeds 15m, the pile fixing frame needs to be manufactured in a sectional mode and then welded in a subsequent splicing mode for extension. In the traditional design, the segmentation of the pile fixing frame is not reserved with an operation allowance, and in the subsequent splice welding extension operation, in order to ensure the overall length and straightness of the pile fixing frame at the same time, an ultra-large amount of surfacing operation is needed to be realized at the butt joint interface position, so that a large amount of manpower, material resources and working hours are consumed, the surfacing quality is difficult to ensure (defects or fine cracks more or less existing in welding seams are easy to become the root of subsequent cracking caused by stress), and the overall structural strength of the pile fixing frame cannot be ensured. In view of this, as a further optimization of the pile holder fabrication process, a cutter opening allowance is reserved at the position of the pre-butt-joint port thereof. Taking the central substrate 1 as an example, after the numerical control flame cutting operation is finished, at least 15mm of cutting allowance is reserved on the front epitaxial plate 12 and the rear epitaxial plate 13 along the length direction of the central substrate. Of course, for the same design purpose, the opening allowance of at least 15mm is left at the interface ends of the cover plate 21, the upper left wing plate 22 and the upper right wing plate 23, the upper longitudinal partition plate 27 and the bottom plate 311, the lower wing plate 312 and the lower longitudinal partition plate 316 of the lower sub-box 31.
As a further optimization of the above solution, in step S1, after the intermediate substrate 1 is prefabricated, a central cross-shaped positioning reference line 112 is drawn on it. The operation of placing each of the 8-shaped plates 14 is performed with the center cross-shaped positioning reference line 112 as a positioning reference. In this way, the problem of out-of-tolerance positioning errors caused by non-uniform references can be effectively reduced, and the correct relative positions of the 8-shaped plates 14 relative to the central main board 11 can be ensured.
As can be clearly seen from fig. 4, after the middle main board 11, the front extension board 12, the rear extension board 13 and the 8-shaped board 14 are tiled on a welding workbench according to a construction blueprint or a specific manufacturing process file, before formally performing welding operation, the front welding precision control datum line 121 and the rear welding precision control datum line 131 can be respectively and correspondingly drawn out on the front extension board 12 and the rear extension board 13 one by one, so that on one hand, in the process of welding and forming the middle base board 1, particularly in the scene of welding and splicing the middle main board 11 by multiple boards, the welding deformation amount and the deformation trend can be indirectly known by measuring the mutual position relationship between the front welding precision control datum line 121 and the rear welding precision control datum line 131 in real time, thereby well laying the adjustment of specific welding process parameters; on the other hand, after the whole pile fixing frame is welded and formed, the pile fixing frame can be used as a test datum line when the pile fixing frame is subjected to joint welding or butt joint assembly welding with a ship body in a formal manner so as to determine the whole straightness, the total length and the height value of the pile fixing frame after the pile fixing frame is erected relative to the ship body.
Naturally, in order to achieve the same object, the cover plate 21 of the upper casing 2 and the bottom plate 31 of the lower sub-casing 31 may be correspondingly marked with welding accuracy control reference lines.
In the process of manufacturing the pile fixing frame in the front project, the upper transverse partition plates 26 and the upper longitudinal partition plates 27 are welded in the inner cavity of the upper box body 2 in a full-welded mode, and the lower transverse partition plates 315 and the lower longitudinal partition plates 316 are welded in the inner cavity of the lower sub box body 3 in a full-welded mode, so that in the welding process of realizing the upper box body 2, the lower sub box body 3 and the middle base plate 1, workers are required to perform weld joint operation on the upper transverse partition plates 26, the upper longitudinal partition plates 27, the lower transverse partition plates 315 and the lower longitudinal partition plates 316 which are unqualified by ribs by means of a carbon arc gouging process in order to ensure strict rib alignment, time and labor are consumed, and the base material is extremely easy to damage. In view of this, as a further optimization of the above-described technical solution, in step S24, neither the upper transverse partition 26 nor the upper longitudinal partition 27 is fully welded, and the welding is temporarily not performed by a length of at least 30cm from the bottom end face up. In step S34, neither the underlying transverse partition 315 nor the underlying longitudinal partition 316 are fully welded, and are temporarily unwelded by a length of at least 30cm from the top end face thereof downward. In this way, when it is found that one of the upper transverse partition 26, the upper longitudinal partition 27, the lower transverse partition 315 and the lower longitudinal partition 316 has out of tolerance for the rib, a worker does not need to perform carbon arc gouging operation on the upper transverse partition 26, the upper longitudinal partition 27, the lower transverse partition 315 and the lower longitudinal partition 316, and can easily and quickly correct the pre-welding end by means of a crowbar or a pushing tool, so that post-welding rib alignment of the upper transverse partition 26, the upper longitudinal partition 27, the lower transverse partition 315 is easy to realize.
As is known, the cooperation of the center mounting hole 142, the upper mounting hole 212, and the lower mounting hole 3172 is mainly used to house a gear transmission mechanism. In the process of implementing the jacking jack-up platform ship, the gear transmission mechanism runs at full power, namely, the middle-mounted mounting hole 142, the upper-mounted mounting hole 212 and the lower-mounted mounting hole 3172 are subjected to the action of extremely large bearing force, for example, the theoretical design structural strength is insufficient, deformation phenomenon can be caused in the areas nearby the middle-mounted mounting hole 142, the upper-mounted mounting hole 212 and the lower-mounted mounting hole 3172, the normal exertion of the working performance of the gear transmission mechanism can be influenced, and even safety accidents can be caused in serious cases. In view of this, as a further optimization of the above-described technical solution, as shown in fig. 7 and 8, an overhead auxiliary reinforcing plate 28 is added in the inner cavity of the overhead tank 2. A lower auxiliary reinforcing rib plate 318 is additionally arranged in the inner cavity of the lower sub-box 31. After the pile fixing frame is assembled and welded, the upper auxiliary reinforcing rib plate 28 and the lower auxiliary reinforcing rib plate 318 are welded with the front side and the back side of the middle main plate 11 respectively, and the opposite ribs are maintained and are opposite to the waist region of the 8-shaped plate 14. In this way, when the central mounting hole 142, the upper mounting hole 212, and the lower mounting hole 3172 receive the bearing force transmitted from the gear transmission mechanism, the upper auxiliary reinforcing rib 28 and the lower auxiliary reinforcing rib 318 cooperate to effectively improve the structural strength and deformation resistance of the areas near the central mounting hole 142, the upper mounting hole 212, and the lower mounting hole 3172.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The pile fixing frame is matched with the pile leg, and is driven in a cooperative manner by a rack and a plurality of power subunits, so that the self-elevating platform ship can be separated from the sea surface; the pile fixing frame is formed by assembling and welding a middle base plate, an upper box body and a lower box body; the middle base plate, the upper box body and the lower box body are respectively provided with a middle mounting hole, an upper mounting hole and a lower mounting hole; the middle mounting hole, the upper mounting hole and the lower mounting hole are matched with each other to position and mount the power subunit;
the pile fixing frame manufacturing process suitable for the self-elevating platform ship comprises the following steps of:
S1, prefabricating the middle substrate;
the middle substrate comprises a middle main board, a front epitaxial board, a rear epitaxial board and an 8-shaped board which are welded into a whole;
prefabricating the middle substrate comprises the following substeps:
s11, a numerical control blanking stage;
cutting and forming the middle main board, the front epitaxial board, the rear epitaxial board and the 8-shaped board in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
in the process of forming the 8-shaped plate, a middle blank mounting hole is cut on the middle plate, machining allowance which is not smaller than 6mm is reserved on a single side of the inner edge of the middle plate, and a plurality of 8-shaped through holes for embedding the 8-shaped plate are cut on the middle main plate;
s12, a plating stage;
sequentially tiling the middle main board, the front epitaxial board, the rear epitaxial board and the 8-shaped board on a welding workbench;
s13, intermittent welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship of the middle main board, the front epitaxial board, the rear epitaxial board and the 8-shaped board;
s14, welding and forming;
forming the middle-set substrate by means of submerged arc welding in a final welding mode, wherein the middle-set substrate is subjected to at least one 180-degree turning operation;
S2, prefabricating the upper box body;
the upper box body comprises a cover plate, an upper left wing plate, an upper right wing plate, an upper front sealing plate, an upper rear sealing plate, an upper transverse partition plate and an upper longitudinal partition plate which are welded into a whole;
prefabricating the overhead box comprises the following substeps:
s21, a numerical control blanking stage;
cutting and forming the cover plate, the upper left wing plate, the upper right wing plate, the upper front sealing plate, the upper rear sealing plate, the upper transverse partition plate and the upper longitudinal partition plate in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
a plurality of overhead blank mounting holes are cut in the cover plate, and machining allowance which is not smaller than 5m is reserved on one side;
s22, a plating stage, which comprises the following substeps;
s221, flatly paving the cover plate on a welding workbench;
s222, drawing an upper positioning datum line set on the cover plate;
s223, sequentially placing the upper transverse partition plate, the upper longitudinal partition plate, the upper left wing plate, the upper right wing plate, the upper front sealing plate and the upper rear sealing plate, and finely adjusting the relative positions of the upper transverse partition plate, the upper longitudinal partition plate, the upper left wing plate, the upper right wing plate, the upper front sealing plate and the upper rear sealing plate by taking the upper positioning datum line set as a reference;
S23, intermittent welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship of the cover plate, the upper left wing plate, the upper right wing plate, the upper front sealing plate, the upper rear sealing plate, the upper transverse partition plate and the upper longitudinal partition plate;
s24, welding and forming;
forming the overhead tank by means of an automatic welding robot to finally weld;
s25, performing aging treatment on the upper box body by means of an aging vibration platform so as to eliminate internal stress of the upper box body;
s3, prefabricating the lower box body;
the lower box body is composed of 2 lower sub box bodies which are symmetrically arranged along the width direction of the middle base plate and are welded independently with the middle base plate;
the lower sub-box body comprises a bottom plate, a lower wing plate, a lower front sealing plate, a lower rear sealing plate, a lower transverse partition plate, a lower longitudinal partition plate and a weight plate which are welded into a whole;
prefabricating the lower sub-box body comprises the following steps:
s31, a numerical control blanking stage;
cutting and forming the bottom plate, the lower wing plate, the lower front sealing plate, the lower rear sealing plate, the lower transverse partition plate, the lower longitudinal partition plate and the weight plate in a numerical control workshop by means of a numerical control flame straight strip cutting machine;
Cutting a lower blank mounting hole on the heavy plate in the process of executing numerical control flame cutting, leaving machining allowance which is not smaller than 6mm on a single side of the inner edge of the lower blank mounting hole, and cutting and forming a plurality of non-full-seal through holes for embedding the heavy plate on the bottom plate;
s32, a plating stage, which comprises the following substeps;
s221, tiling the bottom plate on a welding workbench;
s222, drawing a lower positioning datum line set on the bottom plate;
s223, sequentially placing the lower wing plate, the lower front sealing plate, the lower rear sealing plate, the lower transverse partition plate, the lower longitudinal partition plate and the weight plate, and finely adjusting the relative positions of the lower wing plate, the lower front sealing plate, the lower rear sealing plate and the weight plate by taking the lower positioning datum line set as a reference;
s33, a discontinuous welding positioning stage;
a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relationship of the lower wing plate, the lower front sealing plate, the lower rear sealing plate, the lower transverse partition plate, the lower longitudinal partition plate and the weight plate;
s34, welding and forming;
forming the lower sub-box body by means of an automatic welding robot through final welding;
S35, performing aging treatment on the lower sub-box body by means of an aging vibration platform so as to eliminate internal stress of the lower sub-box body;
s4, the pile fixing frame assembly welding stage comprises the following substeps:
s41, placing the middle substrate on a welding workbench;
s42, placing the upper box body on the middle-placed base plate, and finely adjusting the relative position of the upper box body until the alignment precision between each upper blank mounting hole and the corresponding middle-placed blank mounting hole is controlled within an allowable value range;
s43, performing intermittent welding operation by workers by means of carbon dioxide gas shielded welding to fix the relative position relationship between the upper box body and the middle base plate;
s44, integrally overturning the middle base plate and the upper box body by 180 degrees;
s45, respectively placing 2 lower sub-boxes on the middle-placed base plate, and finely adjusting the relative positions of the lower sub-boxes until the alignment precision between each lower blank mounting hole and the middle blank mounting hole which is opposite to the lower blank mounting hole, the alignment precision between each lower transverse partition plate and the corresponding upper transverse partition plate and the alignment precision between each lower longitudinal partition plate and the corresponding upper longitudinal partition plate are controlled within an allowable value range;
S46, a worker performs intermittent welding operation by means of carbon dioxide gas shielded welding to fix the relative position relation between the lower sub-box body and the middle base plate, and the pile fixing frame is initially assembled;
s47, transferring the pile fixing frame subjected to the preliminary assembly into a welding workshop, completing a main welding seam welding operation on the pile fixing frame by means of an automatic welding production line, and completing a hidden welding seam or a welding leakage section repair welding operation in the cavities of the upper box body and the lower sub box body by means of a carbon dioxide gas shielded welding mode by workers;
s5, a post-welding heat treatment stage is carried out to remove residual welding stress in the pile fixing frame;
s6, machining;
and (3) boring the blank by means of a movable boring machine so as to sequentially mill reserved unilateral machining allowance remained on the inner edges of the upper blank mounting hole, the middle blank mounting hole and the lower blank mounting hole, and controlling coaxiality of the formed upper mounting hole, the middle mounting hole and the lower mounting hole within a quality inspection standard.
2. The pile frame manufacturing process for a jack-up platform ship according to claim 1, wherein in step S11, after the numerical control flame cutting operation is completed, the front epitaxial plate and the rear epitaxial plate each have an opening margin of at least 15mm along the length direction thereof.
3. The process for manufacturing a pile-fixing frame suitable for a jack-up platform ship according to claim 1, wherein the overhead box body further comprises an overhead auxiliary reinforcing rib plate; the lower sub-box body also comprises a lower auxiliary reinforcing rib plate; the upper auxiliary reinforcing rib plates and the lower auxiliary reinforcing rib plates are respectively welded in the cavities of the upper box body and the lower sub box body in a one-to-one correspondence manner; after the pile fixing frame is assembled and spliced, the upper auxiliary reinforcing rib plates and the lower auxiliary reinforcing rib plates are welded with the front side and the back side of the middle main board respectively, the rib alignment is kept, and the upper auxiliary reinforcing rib plates and the lower auxiliary reinforcing rib plates are opposite to the waist area of the 8-shaped board.
4. The pile-holding frame manufacturing process for jack-up platform vessels according to claim 1, wherein in step S47, the automated welding line is composed of left and right welding robots symmetrically arranged on left and right sides of the pile-holding frame; in the actual welding process, the welding actions of the left welding robot and the right welding robot are kept synchronous, and the welding speed is kept consistent.
5. The pile-holding frame manufacturing process for jack-up platform vessels according to claim 1, wherein step S5 comprises the sub-steps of:
S51, heating the pile fixing frame by means of electric heating; a plurality of thermocouples are uniformly distributed on the pile fixing frame near the position of the main welding line;
s52, wrapping heat preservation asbestos around the pile fixing frame along the main welding line so that each thermocouple is fully covered;
s53, in the heating stage, the heating rate is controlled to be 80-120 ℃/hr, the annealing temperature is controlled to be 280-300 ℃, and the total duration is 2.5-3 h.
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104384733A (en) * | 2014-10-23 | 2015-03-04 | 武汉船用机械有限责任公司 | Welding deformation control process used for manufacturing plug type hoisting platform pile leg |
CN204626392U (en) * | 2015-05-05 | 2015-09-09 | 中淳高科桩业股份有限公司 | A kind of preformed pile mechanical connecting structure |
CN204780838U (en) * | 2015-07-01 | 2015-11-18 | 中国船舶工业集团公司第七〇八研究所 | Solid pile frame structure from lift -type platform |
CN107825083A (en) * | 2017-11-30 | 2018-03-23 | 南通蓝岛海洋工程有限公司 | A kind of wedge bracket structure construction technology |
CN108625352A (en) * | 2018-07-16 | 2018-10-09 | 陈杰 | A kind of jack up modular multi-function operation platform |
CN111472357A (en) * | 2020-05-27 | 2020-07-31 | 南通长青沙船舶工程有限公司 | Non-self-propelled self-elevating type wind power installation platform main deck pile fixing frame |
-
2023
- 2023-12-19 CN CN202311747013.0A patent/CN117415572B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104384733A (en) * | 2014-10-23 | 2015-03-04 | 武汉船用机械有限责任公司 | Welding deformation control process used for manufacturing plug type hoisting platform pile leg |
CN204626392U (en) * | 2015-05-05 | 2015-09-09 | 中淳高科桩业股份有限公司 | A kind of preformed pile mechanical connecting structure |
CN204780838U (en) * | 2015-07-01 | 2015-11-18 | 中国船舶工业集团公司第七〇八研究所 | Solid pile frame structure from lift -type platform |
CN107825083A (en) * | 2017-11-30 | 2018-03-23 | 南通蓝岛海洋工程有限公司 | A kind of wedge bracket structure construction technology |
CN108625352A (en) * | 2018-07-16 | 2018-10-09 | 陈杰 | A kind of jack up modular multi-function operation platform |
CN111472357A (en) * | 2020-05-27 | 2020-07-31 | 南通长青沙船舶工程有限公司 | Non-self-propelled self-elevating type wind power installation platform main deck pile fixing frame |
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