CN114834610B - Preparation method of large chemical tanker tank-type bulkhead - Google Patents
Preparation method of large chemical tanker tank-type bulkhead Download PDFInfo
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- CN114834610B CN114834610B CN202210344886.6A CN202210344886A CN114834610B CN 114834610 B CN114834610 B CN 114834610B CN 202210344886 A CN202210344886 A CN 202210344886A CN 114834610 B CN114834610 B CN 114834610B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
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Abstract
The invention relates to a preparation method of a tank bulkhead of a large chemical tanker, which comprises the following steps: trial production of bulkhead plates; welding the Z-shaped stainless steel plate on the jig frame, wherein the edge welding and the edge pressing of the ballast pier are adopted in the welding; after splicing welding, correcting the inner field of the weld angle deformation to ensure that the deviation of the weld angle deformation is less than or equal to 2mm, and measuring the size of the formed groove-shaped plate as first data; the groove-shaped plates are assembled in a diffusion mode to form plate units, allowance cutting and polishing are carried out, the size of each plate unit is measured to be second data, the upper opening and the lower opening of each plate unit are structurally reinforced, and trial production of bulkhead plates is completed; performing data measurement and analysis according to the first data and the second data to determine a margin line of the bulkhead slipway; and (5) preparing bulkhead plates according to the step S1, and welding and folding the prepared bulkhead plates and the bulkhead berth. The method provided by the invention controls the dimensional data of each stage, performs measurement and analysis, determines the allowance line of the bulkhead slipway, reduces the hoisting and positioning times and shortens the manufacturing period.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a preparation method of a tank-shaped bulkhead of a large chemical tanker.
Background
At present, in the field of ship construction, a chemical transport ship is one of high-technology and high-added-value ship types acknowledged in the shipbuilding field at home and abroad, and the manufacturing difficulty is quite large. Chemical ships are used as international sailing ships to carry various chemical products, and due to the design and the ship shape requirements, the bulkhead is designed to be a groove type, the groove type bulkhead is usually formed by pressing steel plates, and the groove type bending is used for replacing a strengthening material, so that the strength and the rigidity of a ship body are ensured, the structural weight can be reduced, and the materials are saved.
In the existing method for manufacturing the tank bulkhead, for example, patent 2015104415323 discloses a method for centering installation and precision control of a sectional tank wall and a reinforcing part of a cargo hold, which comprises four stages, namely a double-layer bottom section manufacturing stage, a tank bulkhead manufacturing stage, a deck body and tank bulkhead section middle combination stage, and a deck section and bottom section folding stage.
For a large stainless steel chemical tanker such as 13800 tons, the tank bulkhead has a large volume, so that the tank bulkhead is prepared by the method, the tank bulkhead needs to be positioned for many times, the fineness is low, the welding and installation difficulty is high, once rework is performed due to excessive errors, an overlong manufacturing period is caused, and the construction efficiency is low.
Therefore, how to relate to a preparation method for preparing the tank bulkhead of the large chemical tanker with short production period is a technical problem to be solved urgently in the field.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a preparation method of a tank bulkhead of a large chemical tanker, which can shorten the manufacturing period of the tank bulkhead and improve the construction efficiency.
In order to achieve the above purpose, the invention provides the following technical scheme: a preparation method of a tank bulkhead of a large chemical tanker comprises the following steps:
step S1, trial-manufacturing bulkhead plates;
s11, welding two adjacent Z-shaped stainless steel plates on a jig frame, wherein a ballast pier is adopted for performing welding and pressing simultaneously in the welding process; after splicing welding, performing inner field correction on the welding seam angular deformation to ensure that the deviation of the welding seam angular deformation is less than or equal to 2mm to form a groove-shaped plate, and measuring the size of the groove-shaped plate as first data;
s12, diffusing and assembling the plurality of groove-shaped plates formed in the step S11 to form plate units, cutting allowance and polishing the plate units, measuring the sizes of the plate units as second data, and respectively performing structural reinforcement on upper openings and lower openings of the plate units by using a reinforcement member to complete trial production of the bulkhead plate;
s2, performing data measurement and analysis according to the first data and the second data, and determining a margin line of a bulkhead slipway;
and S3, preparing the bulkhead plate according to the step S1, and welding and folding the prepared bulkhead plate and the bulkhead slipway.
Further, the jig frame comprises a first jig plate and a second jig plate connected with the first jig plate, wherein the height of the first jig plate is higher than that of the second jig plate; one end of each Z-shaped stainless steel plate is placed on the first tire plate, the other end of each Z-shaped stainless steel plate is placed on the second tire plate, a splice welding seam is formed between every two adjacent Z-shaped stainless steel plates, and splice welding is carried out on the first tire plate.
Further, the two Z-shaped stainless steel plates comprise the following steps before the tailor welding is carried out on the first base plate:
step S111: leveling two Z-shaped stainless steel plates on the second bed plate by ballast piers which are longitudinally arranged, leveling the Z-shaped stainless steel plates on two adjacent first bed plates by ballast piers which are transversely arranged, and isolating the ballast piers from the Z-shaped stainless steel plates by using backing boards;
step S112: a wood board is arranged between the Z-shaped stainless steel plates on the two adjacent first tire plates, the edges of two sides of the wood board are arranged between the two adjacent tailor-welded joints, and a welding machine with a track is arranged on the wood board;
step S113: and stainless steel arc striking plates are arranged at two ends of the tailor-welded joint, and ceramic liners are pasted on the lower surfaces of the joints of the arc striking plates.
Further, adopt the ballast mound to carry out limit welding in the tailor-welded joint and press, specifically include:
carrying out double-sided welding on the first pair of adjacent Z-shaped stainless steel plates to form a convex welding seam, turning over for 180 degrees, welding a concave seam, and after the Z-shaped stainless steel plates are qualified, adopting single-sided welding on the subsequent adjacent Z-shaped stainless steel plates to form a convex welding seam;
when welding, the welding machine removes welding slag from the formed welding line in the walking process, aluminum plates are padded at two ends of the welding line, and the welding line pressurizing load pier is flattened.
Further, the diffusion and assembly of the plurality of trough-shaped plates formed in step S11 specifically includes:
s121, placing a plurality of groove-shaped plates on the jig frame for positioning, placing convex-surface welding seams of the groove-shaped plates on the second jig plate, enabling the concave-surface welding seams to be upward, and placing two ends of each groove-shaped plate on the first jig plate respectively;
step S122, splicing and welding two groove-shaped plates positioned on the first tire plate into a central plate to form a convex welding seam, and then welding concave seams of the groove-shaped plates positioned on the second tire plate;
step S123, turning the central plate 180 degrees, placing the convex welding seam of the central plate on the second tire plate, and welding the concave welding seam on the central plate;
and step S124, with the central plate as the center, continuously diffusing, splicing and welding the groove-shaped plates on two sides of the central plate respectively to form plate units.
Furthermore, when the concave seam on the second tire plate is welded, the two ends of the welded groove-shaped plate are placed on the adjacent two first tire plates, the welding machine is placed on the first tire plate at one end, the large-size ballast pier is ballasted on the first tire plate at the other end through the longitudinal placement, and the small-size ballast pier is ballasted on the adjacent second tire plate at the other side of the welding machine through the longitudinal placement.
Further, the ballast mound with be equipped with aluminum plate between the channel plate and keep apart, aluminum plate locates respectively convex surface welding seam or the both sides of concave surface seam.
Further, adopt the reinforcement to carry out the structure respectively with suitable for reading of plate unit and strengthen, specifically include:
the Z-shaped stainless steel plate comprises two flat plates and an inclined plate connected with the two flat plates;
the upper opening of the plate unit is butted with a plurality of first stainless steel plates arranged at intervals, the first stainless steel plates are butted with the inclined plates, at least one first stainless steel plate is arranged on each inclined plate, I-shaped steel is fixed on each first stainless steel plate, one side of a web plate of each I-shaped steel is fixed with one end, far away from the inclined plates, of each first stainless steel plate, the inner sides of two wing plates of each I-shaped steel are fixed with the two sides of each first stainless steel plate respectively, lifting lugs are installed on the other side of the web plate of each I-shaped steel, and the installation direction of each lifting lug is consistent with the length direction of each I-shaped steel; the thickness of the first stainless steel plate is the same as that of the inclined plate, and when the first stainless steel plate is fixed with the inclined plate, notches are respectively arranged on two sides of the fixed position of the inclined plate and the first stainless steel plate;
a plurality of second stainless steel plates which are arranged at intervals are fixed at the lower opening of the plate unit, the second stainless steel plates are fixed with the flat plates which are positioned in the same plane, at least one second stainless steel plate is fixed on the two flat plates which are spliced and welded in the same plane, the second stainless steel plates are perpendicular to the flat plates, all the second stainless steel plates are positioned in the same plane, channel steel is lapped on the second stainless steel plates, and the outer sides of webs of the channel steel are fixed with all the second stainless steel plates;
and paint layers are coated on the outer sides of the I-shaped steel and the channel steel.
Further, the determining the margin line of the bulkhead berth by performing data measurement and analysis according to the first data and the second data specifically includes:
step S21, marking a preset theoretical allowance line on a bottom plate in a cabin wall ship bottom, wherein the theoretical allowance line comprises a position line and an inspection line;
s22, hoisting the bulkhead plate for positioning, determining an actual allowance line, and comparing a difference value between the actual allowance line and a preset theoretical allowance line;
step S23, if the difference value of the theoretical allowance line and the actual allowance line is within a set range, determining the theoretical allowance line as the allowance line of the bulkhead slipway; and if the difference value between the theoretical allowance line and the actual allowance line exceeds the set range, adjusting the position of the preset theoretical allowance line, and determining the actual allowance line as the allowance line of the bulkhead slipway.
Further, the assembling, welding and folding specifically includes:
CO Using ceramic Mat 2 And welding the bulkhead plate and the bulkhead slipway in a positioning way, polishing a positioning welding area, welding butt joints after the experience is qualified, welding vertical angle joints between the longitudinal and transverse bulkheads and vertical angle joints between the transverse bulkheads and the inner side wall, and finally welding upper and lower corner joints after the deck is installed to finish assembling, welding and folding.
Compared with the prior art, the preparation method of the tank bulkhead of the large chemical tanker has the following advantages:
1. in the preparation method provided by the invention, the trial production of the bulkhead plate is firstly carried out, the size data of each stage is strictly controlled, the first data and the second data are formed, then the data measurement and analysis are carried out, the allowance line of the bulkhead slipway is determined according to the result of the data measurement and analysis, and then the erection welding and the folding are carried out, so that the times of hoisting and positioning are reduced, the manufacturing period is shortened, and the manufacturing of the integral structure can reach the standard requirement;
2. the Z-shaped stainless steel plate is welded into a groove-shaped plate, the groove-shaped plate is welded into a plate unit, the plate unit is welded into a groove-shaped bulkhead, and the whole is divided into parts, deformed dispersedly and controlled respectively, stress concentration is reduced, and therefore the overall deformation of the large chemical tanker is controlled.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a flow chart illustrating a method of making a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating ballast leveling in a method of making a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
FIG. 3 is a schematic view showing placement of a welder in a method of making a large chemical tanker channel bulkhead according to an embodiment of the invention;
FIG. 4 is a schematic view showing the positioning of trough plates in a method of making a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
FIG. 5 is a schematic view showing welding of channel plates in a method of manufacturing a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
FIG. 6 is a schematic view showing structural reinforcement in a method of making a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
FIG. 7 is a side view of the structural reinforcement shown in FIG. 6;
FIG. 8 is a schematic view of the structural reinforcement of FIG. 7 in the direction of the bulkhead plate;
FIG. 9 is a schematic view showing structural reinforcement in a method of making a tank bulkhead for a large chemical tanker according to an embodiment of the invention;
fig. 10 is an enlarged view of a portion B in the structural reinforcement shown in fig. 9.
Reference numerals:
1-a moulding bed, 11-a first moulding bed, 12-a second moulding bed, 2-Z-shaped stainless steel plates, 3-a ballast pier, 4-a wood plate, 5-a welding machine, 6-an aluminum plate, 7-a reinforcing member, 71-a first stainless steel plate, 72-I-shaped steel, 73-a lifting lug, 74-a second stainless steel plate, 75-channel steel, 20-a channel plate and 200-a bulkhead plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "the plural" typically includes at least two.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element described by the phrase "comprising" does not exclude the presence of additional identical elements in the article or device in which the element is included.
The invention is described in detail below with reference to the figures and specific embodiments.
Referring to fig. 1, fig. 1 is a flow chart illustrating a method for manufacturing a tank bulkhead of a large chemical tanker according to an embodiment of the present invention.
The embodiment provides a preparation method of a tank bulkhead of a large chemical tanker, which comprises the following steps:
step S1, trial production of bulkhead plates;
s11, welding two adjacent Z-shaped stainless steel plates on a jig frame, wherein a ballast pier is adopted for performing welding and pressing simultaneously in the welding process; after splicing welding, performing infield correction on the weld corner deformation to ensure that the deviation of the weld corner deformation is less than or equal to 2mm to form a groove-shaped plate, and measuring the size of the groove-shaped plate as first data;
the first data comprises longitudinal data and transverse data of the trough plate, and the longitudinal data comprises the following data:
L N ′＝L N ×[1-K×(A 1 /A 0 )]；
wherein L is N ' is the post-weld longitudinal workpiece length, L N Is the length of the longitudinal workpiece before welding, K is the longitudinal welding coefficient, A 1 Is the cross-sectional area of the bead, A 0 The sectional area of the workpiece is shown, and N is the serial number of the current trough plate;
the lateral data are as follows:
W N ′＝W N -(ξ 1 A 1 /t+ξ 2 ×D N )；
wherein, W N ' is the width of the transverse workpiece after welding, W N Is the width of the transverse workpiece before welding xi 1 As a coefficient of transverse shrinkage, A 1 Is the cross-sectional area of the weld bead, t is the thickness of the workpiece, xi 2 For conversion factor of opening gap, D N Is an open gap between the weldments.
S12, diffusing and assembling the plurality of groove-shaped plates formed in the step S11 to form plate units, cutting allowance and polishing the plate units, measuring the sizes of the plate units to serve as second data, and performing structural reinforcement on an upper opening and a lower opening of each plate unit by using a reinforcing piece to finish trial production of bulkhead plates;
the second data comprises longitudinal data and transverse data of the plate units, and the longitudinal data is as follows:
L＝{L 1 ′，L 2 ′，L 3 ′，……L N ′}
L N ′＝L N ×[1-K×(A 1 /A 0 )]；
wherein L is the length of the longitudinal unit after welding, L N ' is the post-weld longitudinal workpiece length, L N Is the length of the longitudinal workpiece before welding, K is the longitudinal welding coefficient, A 1 Is the cross-sectional area of the weld bead, A 0 To workThe sectional area of the part, N is the serial number of the current trough plate;
the lateral data are as follows:
∑＝W 1 ′+W 2 ′+W 3 ′……+W N ′；
W N ′＝W N -(ξ 1 ×A 1 /t+ξ 2 ×D N )；
wherein, W N ' is the width of the transverse workpiece after welding, W N Is the width of the transverse workpiece before welding xi 1 As a coefficient of transverse shrinkage, A 1 Is the cross-sectional area of the weld bead, t is the thickness of the workpiece, xi 2 Is the open gap conversion factor, D N Is an open gap between the weldments.
S2, performing data measurement and analysis according to the first data and the second data, and determining a margin line of the bulkhead slipway;
and S3, preparing the bulkhead plate according to the step S1, and welding and folding the prepared bulkhead plate and the bulkhead slipway.
Each step is described in detail below.
As shown in fig. 2 and 3, wherein fig. 2 is a schematic view showing step S111 in the method for manufacturing the tank bulkhead of the large chemical tanker according to the embodiment of the invention; fig. 3 is a schematic view illustrating step S112 in the method for manufacturing a tank bulkhead of a large chemical tanker according to an embodiment of the present invention.
In the step S11, the jig frame 1 is a special jig frame for splicing the groove-shaped bulkheads, a plurality of Z-shaped stainless steel plates 2 can be spliced and welded at one time, and the jig frame 1 and the Z-shaped stainless steel plates 2 are required to be cleaned before splicing.
Specifically, the jig frame 1 comprises a first jig plate 11 and a second jig plate 12 connected with the first jig plate 11, wherein the height of the first jig plate 11 is higher than that of the second jig plate 12;
one end of each Z-shaped stainless steel plate 2 is placed on the first tire plate 11, the other end of each Z-shaped stainless steel plate 2 is placed on the second tire plate 12, a tailor-welded joint is formed between every two adjacent Z-shaped stainless steel plates 2, and tailor-welding is carried out on the first tire plate 11. The tailor-welded joint is I-shaped, and the cost of polishing and back chipping is reduced.
It should be noted that, the actual size data of each part, i.e. the Z-shaped stainless steel plate 2, is measured on site before assembly, and the parts with similar tolerances are selected and combined in pairs for assembly. If the difference is too large, the proper part needs to be selected again.
Further, the two Z-shaped stainless steel plates 2 comprise the following steps before the tailor welding is performed on the first tire plate 11:
step S111: and ballasting and leveling two Z-shaped stainless steel plates 2 on the second tire plates 12 through longitudinally-arranged ballasting piers 3, ballasting and leveling Z-shaped stainless steel plates 2 on two adjacent first tire plates 11 through transversely-arranged ballasting piers 3, and isolating the ballasting piers 3 from the Z-shaped stainless steel plates 2 through the cushion plates 4.
The ballast pier 3 is a heavy object with a certain weight, the wood boards 4 are respectively arranged at two sides of the tailor-welded joint, and concretely, the wood boards can be 20X 200X 600 mm.
Z shape stainless steel plate 2 adjusts the flat difference through ballast mound 3 before the welding, reduces the probability of warping when welding, avoids producing the contact carburization through 4 isolations of plank simultaneously, plays the guard action.
Step S112: and (3) overlapping wood plates 4 between the Z-shaped stainless steel plates 2 on two adjacent first base plates 11, wherein the edges of two sides of each wood plate 4 are positioned between two adjacent tailor-welded joints, and placing a welding machine 5 with a track on each wood plate 4.
Step S113: and installing stainless steel arc striking plates at two ends of the tailor-welded joint, and sticking a ceramic liner on the lower surface of the joint of the arc striking plates.
Specifically, the stainless steel arc ignition plate is a metal plate which is assembled at the beginning and the end of a welding seam before welding, in order to obtain a welding seam section with normal size at the beginning and the end of a butt welding seam and avoid welding seam defects caused by arc ignition and arc ending, welding is respectively started and stopped on the two plates, and the two plates can be cut off after welding. The size of the stainless steel arc striking plate is 100 multiplied by 10mm, when the gap of the splice welding seam is larger than 1mm, a ceramic liner is used for welding again to ensure the stability of welding current.
Further, adopt the ballast mound to carry out limit welding in the tailor-welded joint and press, specifically include:
and after the first pair of adjacent Z-shaped stainless steel plates 2 are turned over by 180 degrees after a convex welding seam is formed, welding the concave welding seam, and after the evaluation is qualified, performing single-side welding on the subsequent adjacent Z-shaped stainless steel plates 2 to form the convex welding seam.
The welding is specifically positioning welding, which refers to welding for assembling and fixing the position of a weldment joint, and welding current and voltage are welded according to specified parameters given by a welding process.
The test and evaluation is a first test and evaluation, which means that when the first pair of adjacent Z-shaped stainless steel plates 2 are subjected to double-side welding to form a first trough-shaped plate 20, the first trough-shaped plate is qualified through special test, and if the surface protection, the unevenness, the appearance and the internal quality of a welding line meet the requirements, the subsequent adjacent Z-shaped stainless steel plates 2 are continuously welded.
When welding, the welding slag is removed from the formed welding line in the walking process of the welding machine 5, the aluminum plates 6 are padded at the two ends of the welding line, the aluminum plates are isolated so as to avoid damaging the surface of the Z-shaped stainless steel plate 2 due to tack welding, and the aluminum plates 6 are 5 multiplied by 250 multiplied by 1200mm. And flattening the welding seam pressurizing pier 3 immediately after the welding seam is still red hot after the welding machine 5 runs, and ballasting 4-5 longitudinally-arranged ballasting piers by taking a 6m long welding seam as an example so as to reduce the deformation of the welding seam.
As shown in fig. 4 and 5, wherein fig. 4 is a schematic view showing step S121 in the method for preparing the tank bulkhead of the large chemical tanker according to the embodiment of the invention; fig. 5 is a schematic view showing step S122 in the method for manufacturing the tank bulkhead of the large chemical tanker according to the embodiment of the present invention.
In step S12, the diffusion assembly of the plurality of trough-shaped plates formed in step S11 specifically includes:
step S121, the groove-shaped plates 20 are placed on the jig frame 1 for positioning, convex welding seams of the groove-shaped plates 20 are placed on the second jig plate 12, the concave welding seams are upward, and two ends of each groove-shaped plate 20 are respectively placed on the first jig plate 11.
Step S122, the two groove plates 20 on the first tire plate 11 are spliced and welded into a center plate to form a convex weld, and then the concave seams of the groove plates 20 on the second tire plate 12 are welded.
Further, when the concave joint on the second bed-jig 12 is welded, the two ends of the welded groove plate 20 are placed on the two adjacent first bed-jigs 11, the welding machine 5 is placed on the first bed-jig 11 at one end, the ballast of the large ballast pier is placed on the first bed-jig 11 at the other end through the longitudinal direction, and the ballast of the small ballast pier is placed on the adjacent second bed-jig 12 at the other side of the welding machine 5 through the longitudinal direction, so that the angular deformation during the welding of the concave joint is reduced. At this time, the sizes of the ballast piers on the first tire plate 11 and the second tire plate 12 are different according to the welding deformation condition of the seam, and the specific sizes of the ballast piers can be set in advance according to the actual condition.
Further, the welding machine 5 is a welding machine with a track, and when the welding machine 5 is placed on the surface of the groove-shaped plate 20 on the first tire plate 11, the groove-shaped plate 20 is separated by asbestos cloth under the track, so that a protection effect is achieved.
Further, aluminum plates 6 are arranged between the ballast piers 3 and the trough plate 20 for isolation, and the aluminum plates 6 are respectively arranged on two sides of the convex welding seam or the concave welding seam. Specifically, aluminum plate 6 was 5X 200X 1200mm.
And S123, turning the central plate by 180 degrees, placing the convex welding seam of the central plate on the second tire plate 12, and welding the concave welding seam on the central plate.
And step S124, continuously diffusing, splicing and welding the groove-shaped plates 20 on the two sides of the central plate by taking the central plate as the center to form plate units.
It should be noted that, when the plate units are jointed, the geometric dimensions of the trough-shaped plates should be strictly controlled, after passing the strict inspection by the quality inspection department, the trough-shaped plates can be welded, and the data related to the actual geometric dimensions are provided for the next procedure.
And scribing, cutting allowance and polishing after the plate unit is qualified through welding inspection, and respectively performing structural reinforcement on an upper opening and a lower opening of the plate unit by using a reinforcement member 7 to generate a bulkhead plate 200, thereby completing trial production of the bulkhead plate 200.
As shown in fig. 6, 7 and 8, fig. 6 is a schematic view illustrating structural reinforcement in a method for manufacturing a tank bulkhead of a large chemical tanker according to an embodiment of the present invention; FIG. 7 is a side view of the structural reinforcement shown in FIG. 6; fig. 8 is a schematic view of the structural reinforcement of fig. 7 in the direction of the bulkhead plate. The panel unit is a part of bulkhead panel 200, and the positional relationship of bulkhead panel 200 when structurally reinforced is shown in the drawing.
The upper opening of the plate unit is structurally reinforced by a reinforcing part 7 to be used as temporary structural reinforcement, so that the geometric dimension of the groove shape is ensured.
The method specifically comprises the following steps:
the Z-shaped stainless steel plate comprises two flat plates and inclined plates for connecting the two flat plates, and two adjacent inclined plates in the bulkhead plate block 200 are in mirror symmetry;
the upper opening of the bulkhead plate 200 is butted with a plurality of first stainless steel plates 71 which are arranged at intervals; the first stainless steel plate 71 is butted with the inclined plate, namely the first stainless steel plate 71 and the inclined plate are positioned in the same plane; each inclined plate is provided with at least one first stainless steel plate 71. I-shaped steel 72 is fixed on the first stainless steel plate 71, one side of a web plate of the I-shaped steel 72 is fixed with one end, far away from the inclined plate, of each first stainless steel plate 71, the inner sides of two wing plates of the I-shaped steel 72 are fixed with two sides of the first stainless steel plate 71 respectively, lifting lugs 73 are installed on the other side of the web plate of the I-shaped steel 72, and the installation direction of the lifting lugs 73 is consistent with the length direction of the I-shaped steel 72. When the first stainless steel plate 71 is fixed to the swash plate, notches are respectively formed in two sides of the fixed position of the swash plate and the first stainless steel plate 71, so that the first stainless steel plate 71 and the swash plate can be welded conveniently, and the welding strength of the first stainless steel plate 71 and the swash plate is improved. Specifically, when notches are provided on both sides of the swash plate, the cross section of the fixing portion between the swash plate and the first stainless steel plate 71 is tapered (as shown in fig. 8). In addition, the outer side of the i-beam 72 is coated with a paint layer to prevent the first stainless steel plate 71 from being contaminated by rust and dust thereon.
As shown in fig. 9 and 10, fig. 9 is a schematic view illustrating structural reinforcement in a method for manufacturing a tank bulkhead for a large chemical tanker according to an embodiment of the present invention; fig. 10 is an enlarged view of a portion B in the structural reinforcement shown in fig. 9. The panel unit is a part of bulkhead panel 200, and the positional relationship of bulkhead panel 200 when structurally reinforced is shown in the drawing.
Adopt reinforcement 7 to carry out the structure to the end opening of panel unit and strengthen, specifically include:
the lower opening of the bulkhead plate 200 is fixed with a plurality of second stainless steel plates 74 which are arranged at intervals, the second stainless steel plates 74 are fixed with flat plates which are positioned in the same plane, at least one second stainless steel plate 74 is fixed on two flat plates which are welded in the same plane, the second stainless steel plates 74 are perpendicular to the flat plates, and all the second stainless steel plates 74 are positioned in the same plane. The second stainless steel plates 74 are overlapped with channel steel 75, in one application scenario, the inner side of one wing plate of the channel steel 75 is fixed to the upper side faces of all the second stainless steel plates 74, and in another application scenario, the outer side of a web plate of the channel steel 75 is fixed to the upper side faces or the lower side faces of all the second stainless steel plates 74. In addition, the outside of the channel 75 is painted to prevent rust and dust thereon from contaminating the second stainless steel plate 74.
Wherein, the distance between the second stainless steel plate 74 and the tailor welded joint on the bulkhead plate 200 is staggered by more than 50 mm.
In step S2, performing data measurement and analysis according to the first data and the second data to determine the margin line of the bulkhead slipway, which specifically includes:
and S21, marking a preset theoretical allowance line on the bottom plate in the cabin wall slipway, wherein the theoretical allowance line comprises a position line and a check line.
Specifically, before the bulkhead plate 200 is installed, an installation position line and an inspection line are marked on the inner bottom plate according to the actual positions of the stringers, the rib plates and the inclined toggle plates below the longitudinal and transverse bulkhead plates 200, and the inspection line is marked at a position 50mm away from the actual welding position line.
And the theoretical allowance line is drawn after data measurement and analysis are carried out on the first data and the second data.
And S22, hoisting the bulkhead plate 200, positioning, determining an actual allowance line, and comparing the difference between the actual allowance line and a preset theoretical allowance line.
After the bulkhead plate 200 is positioned, an actual allowance line is drawn, in the process, attention needs to be paid that the width and the depth direction of the groove shape and the alignment of the inner bottom longitudinal girder and the inclined rib plate are within a tolerance range, and the compensation allowance and the groove shape width can be used for adjustment by pulling and pressing when necessary.
S23, if the difference value of the theoretical allowance line and the actual allowance line is in a set range, determining the theoretical allowance line as the allowance line of the cabin wall berth; and if the difference value between the theoretical allowance line and the actual allowance line exceeds a set range, adjusting the position of the preset theoretical allowance line, and determining that the actual allowance line is the allowance line of the bulkhead slipway.
When the bulkhead plate 200 is installed, the bulkhead plate is aligned with a corresponding framework below the inner bottom plate in a margin adjusting and borrowing mode and meets the requirement.
In the step S3, assembling, welding and folding are performed, which specifically includes:
CO Using ceramic Mat 2 Welding the bulkhead plate and the bulkhead slipway, polishing the tack welding area, welding butt joints after the experience is qualified, welding vertical angle joints between the longitudinal bulkheads and the transverse bulkheads and vertical angle joints between the transverse bulkheads and the inner side walls, and finally welding upper and lower corner joints after the deck is installed to finish assembling, welding and folding.
The above description is for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, which is intended to be clearer and more understandable, but rather, the present invention is intended to be covered by the scope of the appended claims.
Claims (8)
1. A preparation method of a tank-shaped bulkhead of a large chemical tanker is characterized by comprising the following steps:
step S1, trial-manufacturing bulkhead plates;
s11, splicing and welding two adjacent Z-shaped stainless steel plates on a jig frame, wherein the splicing and welding are carried out while welding and pressing by adopting a ballast pier; after splicing welding, performing inner field correction on the welding seam angular deformation to ensure that the deviation of the welding seam angular deformation is less than or equal to 2mm to form a groove-shaped plate, and measuring the size of the groove-shaped plate as first data;
s12, diffusing and assembling the plurality of groove-shaped plates formed in the step S11 to form plate units, cutting allowance of the plate units, polishing the plate units, measuring the sizes of the plate units as second data, and performing structural reinforcement on upper openings and lower openings of the plate units respectively by using a reinforcing piece to finish trial production of the bulkhead plate;
s2, performing data measurement and analysis according to the first data and the second data, and determining a margin line of a bulkhead slipway;
s3, preparing bulkhead plates according to the step S1, and welding and folding the prepared bulkhead plates and the bulkhead berth;
the jig frame comprises a first jig plate and a second jig plate connected with the first jig plate, wherein the height of the first jig plate is higher than that of the second jig plate;
one end of each Z-shaped stainless steel plate is placed on the first bed mould, the other end of each Z-shaped stainless steel plate is placed on the second bed mould, a splice welding seam is formed between every two adjacent Z-shaped stainless steel plates, and splice welding is carried out on the first bed mould;
adopt the ballast pier to carry out limit welding limit in the tailor-welded joint and press, specifically include:
the first pair of adjacent Z-shaped stainless steel plates are subjected to double-sided welding to form a convex welding seam, the first pair of adjacent Z-shaped stainless steel plates are turned over by 180 degrees, a concave welding seam is welded, and after the first pair of adjacent Z-shaped stainless steel plates are qualified through evaluation, the subsequent adjacent Z-shaped stainless steel plates are subjected to single-sided welding to form a convex welding seam;
when welding, the welding machine removes welding slag from the formed welding line in the walking process, aluminum plates are padded at two ends of the welding line, and the welding line pressurizing load pier is flattened.
2. A method for producing a channel bulkhead according to claim 1 wherein, prior to the tailor welding of the two Z-shaped stainless steel panels to the first blank, the method includes the steps of:
step S111: ballasting and leveling two Z-shaped stainless steel plates on the second bed moulds through longitudinally-arranged ballasting piers, ballasting and leveling Z-shaped stainless steel plates on two adjacent first bed moulds through transversely-arranged ballasting piers, and isolating the ballasting piers from the Z-shaped stainless steel plates through backing boards;
step S112: a wood board is arranged between the Z-shaped stainless steel plates on the two adjacent first tire plates, the edges of two sides of the wood board are arranged between the two adjacent tailor-welded joints, and a welding machine with a track is arranged on the wood board;
step S113: and stainless steel arc striking plates are arranged at two ends of the tailor-welded joint, and ceramic liners are pasted on the lower surfaces of the joints of the arc striking plates.
3. The method for manufacturing a grooved bulkhead according to claim 1, wherein the diffusion bonding of the plurality of grooved plates formed in step S11 specifically includes:
s121, placing a plurality of groove-shaped plates on the jig frame for positioning, placing convex-surface welding seams of the groove-shaped plates on the second jig plate, enabling the concave-surface welding seams to be upward, and placing two ends of each groove-shaped plate on the first jig plate respectively;
step S122, splicing and welding the two groove-shaped plates on the first tire plate into a central plate to form a convex welding seam, and then welding the concave seams of the groove-shaped plates on the second tire plate;
step S123, turning the central plate 180 degrees, placing the convex welding seam of the central plate on the second tire plate, and welding the concave welding seam on the central plate;
and step S124, taking the central plate as a center, and continuously diffusing, splicing and welding the groove-shaped plates on two sides of the central plate respectively to form a plate unit.
4. A method of forming a channel bulkhead as defined in claim 3 wherein, when welding the recessed seams in the second tire plate, the welded channel plate is positioned at opposite ends on adjacent first tire plates, the first tire plate at one end having a welder positioned thereon, the first tire plate at the other end being ballasted with longitudinally positioned large ballast piers, and the adjacent second tire plate at the other end having a welder being ballasted with longitudinally positioned small ballast piers.
5. The method for producing a channel bulkhead according to claim 4 wherein the ballast piers are separated from the channel plates by aluminum plates disposed on either side of the convex or concave welds.
6. The method for manufacturing a tank bulkhead according to claim 1, wherein the step of using the reinforcing members to structurally reinforce the upper port and the lower port of the plate unit respectively comprises the steps of:
the Z-shaped stainless steel plate comprises two flat plates and an inclined plate for connecting the two flat plates;
the upper opening of the plate unit is butted with a plurality of first stainless steel plates arranged at intervals, the first stainless steel plates are butted with the inclined plates, at least one first stainless steel plate is arranged on each inclined plate, I-shaped steel is fixed on each first stainless steel plate, one side of a web plate of each I-shaped steel is fixed with one end, far away from the inclined plate, of each first stainless steel plate, the inner sides of two wing plates of each I-shaped steel are fixed with the two sides of each first stainless steel plate respectively, a lifting lug is installed on the other side of the web plate of each I-shaped steel, and the installation direction of each lifting lug is consistent with the length direction of each I-shaped steel; the thickness of the first stainless steel plate is the same as that of the inclined plate, and when the first stainless steel plate is fixed with the inclined plate, notches are respectively arranged on two sides of the fixed position of the inclined plate and the first stainless steel plate;
a plurality of second stainless steel plates which are arranged at intervals are fixed at the lower opening of the plate unit, the second stainless steel plates are fixed with the flat plates which are positioned in the same plane, at least one second stainless steel plate is fixed on the two flat plates which are spliced and welded in the same plane, the second stainless steel plates are perpendicular to the flat plates, all the second stainless steel plates are positioned in the same plane, channel steel is lapped on the second stainless steel plates, and the outer sides of webs of the channel steel are fixed with all the second stainless steel plates;
and paint layers are coated on the outer sides of the I-shaped steel and the channel steel.
7. The method for preparing a tank bulkhead according to claim 1, wherein the step of performing data measurement and analysis based on the first data and the second data to determine the margin line of the bulkhead slipway comprises the steps of:
step S21, marking a preset theoretical allowance line on a bottom plate in a cabin wall ship bottom, wherein the theoretical allowance line comprises a position line and an inspection line;
s22, hoisting the bulkhead plate for positioning, determining an actual allowance line, and comparing a difference value between the actual allowance line and a preset theoretical allowance line;
step S23, if the difference value of the theoretical allowance line and the actual allowance line is within a set range, determining the theoretical allowance line as the allowance line of the bulkhead slipway; and if the difference value between the theoretical allowance line and the actual allowance line exceeds a set range, adjusting the position of the preset theoretical allowance line, and determining that the actual allowance line is the allowance line of the bulkhead slipway.
8. The method for producing a channel bulkhead as defined in claim 1 wherein the welding together includes:
CO Using ceramic Mat 2 And welding the bulkhead plate and the bulkhead slipway, polishing a welding area, welding a butt joint after the welding area is qualified through experience evaluation, welding a vertical angle joint between a longitudinal bulkhead and a transverse bulkhead and a vertical angle joint between a transverse bulkhead and a board side inner wall, and welding an upper corner joint and a lower corner joint after the deck is installed to finish welding and folding.
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