A construction process for a heavy crane support cylinder base of a large crane ship

Abstract

The present application discloses a construction process for a heavy crane support cylinder base of a large crane ship, and relates to the technical field of shipbuilding. The heavy crane support cylinder base includes a first cylinder, a second cylinder and a reinforcement structure. The present application adopts segmentation / sheet division to improve the construction accuracy and reduce the deformation caused by welding. In addition, reasonable arrangement of welds and construction sequence is conducive to ensuring that welding shrinkage deformation is controllable, optimizing welding methods and welding sequence, and combining process accuracy with precise control, so as to realize the construction of the heavy crane support cylinder base structure of a large crane ship.

Description

Technical Field

[0001] The present application relates to the technical field of shipbuilding, and in particular to a construction process for a heavy crane support cylinder base of a large crane ship. Background Art

[0002] The supporting base structure of the heavy crane of a large crane ship is often connected to the deck below the ship, and some are even connected to the bottom plate of the ship. The supporting structure of the heavy crane of a large crane ship is usually a cylindrical structure, and has the characteristics of large size (the diameter of the cylinder cross section can range from more than 10 meters to 20 meters), overall tonnage (ranging from 500 tons to nearly 1,000 tons), and high precision requirements for the upper interface surface (the horizontality, ellipticity, circumference of the cylinder and the deflection of the cylinder center axis on the upper surface of the supporting cylinder base are higher than the conventional precision requirements of the ship structure). In addition, the supporting base is a high-stress part, and has special requirements for the structural fracture and weld arrangement. Conventional hull structure construction methods are difficult to meet the construction requirements of such structures. Summary of the invention

[0003] The present application aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the present application embodiment provides a construction process for a heavy crane support cylinder base of a large crane ship, which effectively solves the construction demand for a heavy crane support cylinder base of a large crane ship.

[0004] According to an embodiment of the present application, a construction process for a heavy crane support cylinder base of a large crane ship is provided, wherein the heavy crane support cylinder base comprises a first cylinder, a second cylinder and a reinforcement structure, and comprises the following steps:

[0005] S1, prefabricate the splicing parts, locate the installation position and calibration reference line of the second cylinder on the bottom plate of the ship;

[0006] S2. constructing a support structure at the installation location;

[0007] S3, butting a plurality of the splicing pieces end to end in sequence within the verification control line to form an unformed cylinder layer, and when the measurement value between the unformed cylinder layer and the verification control line is at a preset value, the butt joints of two adjacent splicing pieces are vertically butt-welded to form a formed cylinder layer, and the butt joints between the splicing pieces and the bottom plate are horizontally butt-welded;

[0008] S4, sequentially butting a plurality of the splicing pieces end to end on the formed cylinder layer to form an unformed cylinder layer, so that the measurement value between the unformed cylinder layer and the calibration control line is at a preset value, the butt joints of two adjacent splicing pieces of the unformed cylinder layer are vertically butt-welded, and the borders of the splicing pieces of two adjacent layers of the cylinder layer are horizontally butt-welded;

[0009] S5, repeating step S4 until the second cylinder is formed;

[0010] S6. Arranging the reinforcement structure in the second cylinder;

[0011] S7, hoisting the inner deck sheet structure. Before this step of hoisting and installation, the inner deck longitudinal bones and deck girders have been welded to the bottom of the inner deck to form a sheet structure;

[0012] S8, repeating step S4 on the second cylinder until the first cylinder is formed;

[0013] S9, the reinforcement structure is arranged in the first cylinder;

[0014] S10, the outer wall of the second cylinder is welded to the hull bulkhead, and the first cylinder is exposed on the hull deck.

[0015] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the vertical welding lines formed by the vertical butt welding of any two layers of the cylinder layers are not in the same straight line.

[0016] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the vertical distance between the vertical welding lines of two adjacent layers of the cylinder is greater than 0.3 meters.

[0017] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, all the vertical welding lines close to the same vertical direction are arranged in a stepped manner.

[0018] According to the construction process of the heavy crane support cylinder base of a large crane ship described in the embodiment of the present application, a center-symmetrical skip welding method is adopted to perform the vertical butt welding.

[0019] According to the construction process of the heavy crane support cylinder base of a large crane ship described in the embodiment of the present application, a center-symmetrical skip welding method is adopted to perform the horizontal butt welding.

[0020] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the reinforcement structure includes a plurality of first reinforcement members and second reinforcement members, the first reinforcement members are vertically arranged, and the first reinforcement members are arranged in an array on the inner cylinder wall of the second cylinder or the first cylinder, the first reinforcement member spans between the two ends of the second cylinder or the first cylinder, the second reinforcement member is annular, the second reinforcement members are arranged in an array along the vertical direction, and all the first reinforcement members are fixedly connected to the second reinforcement members.

[0021] According to the process for building a heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the first reinforcement of the first cylinder extends to fit the inner cylinder wall of the second cylinder.

[0022] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the second cylinder includes at least 5 cylinder layers, the first cylinder includes at least two cylinder layers, and the height of the first cylinder is at least 4 meters.

[0023] According to the construction process of the heavy crane support cylinder base of a large crane ship described in an embodiment of the present application, the splicing pieces are arc-shaped plates, and each layer of the cylinder includes at least 4 splicing pieces.

[0024] The above-mentioned heavy crane support cylinder base construction process for large crane ships has at least the following beneficial effects: the construction process of the present application adopts segmentation / sheet division to improve the construction accuracy and reduce the deformation caused by welding. In addition, the reasonable arrangement of welds and construction sequence is conducive to ensuring that welding shrinkage deformation is controllable, optimizing welding methods and welding sequences, and combining process accuracy with precise control to achieve the construction of the heavy crane support cylinder base structure of large crane ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application is further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 is a schematic diagram of the connection between the heavy crane support cylinder base and the hull in an embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of the structure of the ship bottom segment in an embodiment of the present application;

[0028] Figure 3 It is a schematic diagram of the segmented structure of the hull deck in an embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the expansion of the cylinder wall structure of the heavy crane support cylinder base in the embodiment of the present application;

[0030] Figure 5 is a bird's-eye view of the base structure in an embodiment of the present application;

[0031] Figure 6 yes Figure 5 The M-direction view in the figure;

[0032] Figure 7 yes Figure 5 The cross-sectional view along the AA direction;

[0033] Figure 8 yes Figure 5The cross-sectional view along the BB direction;

[0034] Fig. 9 yes Figure 5 Cross-sectional view along CC direction;

[0035] Fig.10 yes Figure 5 The cross-sectional view along the DD direction;

[0036] Fig.11 yes Figure 7 A cross-sectional view along the A1-A1 direction;

[0037] Fig.12 This is a schematic diagram of the structure of the cylinder layer in an embodiment of the present application;

[0038] Fig.13 is a schematic diagram of welding the first reinforcement member and the second cylinder or the first cylinder in an embodiment of the present application;

[0039] Fig.14 It is a schematic diagram of horizontal butt welding in an embodiment of the present application. DETAILED DESCRIPTION

[0040] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0044] Reference Figure 1 The hull of the application embodiment includes a hull deck 210 and a bottom plate 260. A hull cabin is arranged between the hull deck 210 and the bottom plate 260. The hull cabin is divided by a transverse bulkhead, an inclined bulkhead and a middle longitudinal bulkhead. The heavy crane support cylinder base of the present application passes through the hull deck 210 and extends to the bottom plate 260, and part of the heavy crane support cylinder base is exposed outside the hull deck 210.

[0045] The heavy crane supporting cylinder base of the present application includes a first cylinder 110 , a second cylinder 120 and a reinforcement structure, wherein the first cylinder 110 is exposed from the hull deck 210 , and the first cylinder 110 and the second cylinder 120 are both provided with reinforcement structures.

[0046] The construction process of the heavy crane support cylinder base of the large crane ship of the present application mainly includes the following steps:

[0047] S1. When assembling the hull, first assemble the bottom plate 260, such as Figure 2 As shown, the ship bottom is divided into a first section 261, a second section 262, two symmetrical third sections 263 and two symmetrical fourth sections 264. The first section 261 is the main bearing part of the heavy crane support cylinder base, and a positioning hole is arranged therein, and the remaining parts are arranged around the first section 261. When constructing the heavy crane support cylinder base, the splicing piece 101 is prefabricated first, and the installation position and the verification control line of the second cylinder 120 are located on the ship bottom plate 260 with the ship bottom plate 260 as the plane, wherein the installation position of the second cylinder 120 refers to the central axis position of the second cylinder 120, and the verification control line refers to the circumferential theoretical line of the inner cylinder wall and the outer cylinder wall of the second cylinder 120.

[0048] After completing step S2 and step S1, build a support structure at the installation location.

[0049] The support structure includes a support seat inner cylinder 134, a plurality of radial bottom girders 135, a plurality of transverse reinforcing walls 136 and a longitudinal reinforcing wall 139. The support seat inner cylinder 134 is vertically arranged and located at the center of the second cylinder 120. The radial bottom girders 135 and the transverse reinforcing walls 136 are arranged in a circular array along the horizontal direction with the support seat inner cylinder 134 as the center. The two sides of the transverse reinforcing wall 136 or the two sides of the longitudinal reinforcing wall 139 are respectively connected to the support seat inner cylinder 134 and the second cylinder 120. In the embodiment of the present application, the two sides of the transverse reinforcing wall 136 are respectively connected to the support seat inner cylinder 134 and the second cylinder 120, and the two sides of the longitudinal reinforcing wall 139 are respectively connected to the support seat inner cylinder 134 and the second cylinder 120. Furthermore, the supporting structure also includes a plurality of inner bottom longitudinals 138 , which are hot-rolled steel profiles, with their length direction parallel to the bow and stern direction of the ship. The bottom is welded to the bottom plate 260 , passes through the transverse reinforcement wall 136 , and both ends are welded to the inner wall of the second cylinder 120 .

[0050] The radial bottom girder 135 is arranged in the horizontal direction. The radial bottom girder 135 is a girder (T-shaped bar) welded to the bottom plate. The inner cylinder 134 of the support seat is arranged in the vertical direction. Figures 7 to 10 It is understood that the inner cylinder 134 of the support seat is one and vertically arranged. When the inner cylinder 134 of the support seat is hoisted, it is necessary to detect whether the inner cylinder 134 of the support seat is at the central axis position of the second cylinder 120. The radial bottom girder 135 is arranged in a circular array with the inner cylinder 134 of the support seat as the center. After the radial bottom girder 135 and the inner cylinder 134 of the support seat are assembled, a transverse reinforcement wall 136 and a longitudinal reinforcement wall 139 are arranged on the inner cylinder 134 of the support seat; from a top view, the transverse reinforcement wall 136 and the longitudinal reinforcement wall 139 form a cross structure. The radial bottom girder 135 extends from the inner cylinder wall of the second cylinder 120 to the outer wall of the inner cylinder 134 of the support seat. The support structure here not only supports the inside of the second cylinder 120, but also supports the tire frame when the second cylinder 120 is built. There is no need to make an additional temporary tire frame when building the cylinder structure.

[0051] S3. After the support structure is built, several splicing pieces 101 are hoisted into the verification control line, and several splicing pieces 101 are sequentially butted end to end in the verification control line to form an unformed cylinder layer 140. When the measured value between the unformed cylinder layer 140 and the verification control line is at a preset value, the preset value here refers to the difference between the inner circle or outer circle of the cylinder layer 140 and the circumference theoretical line, and the preset value is generally 1mm to 2mm. The butt joints of two adjacent splicing pieces 101 are vertically butt-welded to form a formed cylinder layer 140, and the butt joints of the splicing pieces 101 and the bottom plate 260 are horizontally butt-welded to ensure that the first cylinder layer 140 is firmly fixed to the bottom plate 260.

[0052] Among them, the vertical butt welding is carried out by using the center-symmetrical jump welding method. Specifically, Fig.12 As shown, the cylinder layer 140 of the embodiment of the present application is formed by butting four splicing pieces 101. When vertically butting welding, the butting points of two adjacent splicing pieces 101 are A1, A2, B1, and B2. The vertical butt welding of each layer needs to be performed in the following order: automatic welding machine A (welder A): A1→A2; automatic welding machine B (welder B): B1→B2. A and B are welded synchronously in the same direction and at a similar speed.

[0053] Among them, the horizontal butt welding is carried out by the symmetrical jump welding method. Specifically, Fig.14 As shown, the outer circumference of the second cylinder 120 or the first cylinder 110 can be divided into 36 parts in advance. When horizontally butting the two adjacent layers of the cylinder layer 140 or the cylinder layer 140 and the bottom plate 260, two automatic welding machines (or two welders) are used for joint welding, and the operating parameters of the two automatic welding machines are required to be set consistent (the operating skills of the two welders should be relatively close to each other) so that the welding speed is similar to ensure that the heat input energy of the weld is equal. According to the established welding sequence, the vertical fillet welds of the cylindrical shell plate and the vertical stiffener are welded in turn by using the method of split-center symmetrical jump welding. Each weld in the groove needs to be executed according to the following established sequence: automatic welding machine A (welder A): M1→M2→M3→……→M18; automatic welding machine B (welder B): N1→N2→N3→……→N18.

[0054] S4. Several splicing pieces 101 are butt-jointed end to end on the formed cylinder layer 140 to form an unformed cylinder layer 140, so that the measurement value between the unformed cylinder layer 140 and the calibration control line is at a preset value. Specifically, a plumb line is hung from the two end points of the upper edge of each hoisted splicing piece 101 and the center point of the arc to the bottom plate 260 (it should be noted that the plumb line method can be used in actual operation, but is not limited to this method for accuracy inspection and control), and the deviation value from the circumferential theoretical line of the outer cylinder wall at the bottom plate 260 is checked. After controlling and adjusting the accuracy of the outer cylinder wall not to exceed the standard, the butt joints of two adjacent splicing pieces 101 of the unformed cylinder layer 140 are vertically butt-welded, and the borders of the splicing pieces 101 of two adjacent cylinder layers 140 are horizontally butt-welded, so as to build a second cylinder layer on the basis of the first cylinder layer 140. It should be noted that in the embodiment of the present application, both vertical butt welding and horizontal butt welding are performed using the center-symmetrical jump welding method. The horizontal welding line 103 formed by the horizontal butt welding is arranged in the horizontal direction, and the vertical welding line 102 formed by the vertical butt welding is arranged in the vertical direction.

[0055] S5. Repeat the above step S4 until the second cylinder 120 is formed. In the embodiment of the present application, the second cylinder 120 includes at least 5 cylinder layers 140. Of course, the optimal number of layers can be selected according to actual conditions.

[0056] S6. A reinforcement structure is provided in the second cylinder 120. The reinforcement structure can improve the overall structural rigidity of the second cylinder 120 and improve the load capacity.

[0057] S7, hoisting the sheet structure of the inner deck 209. Before this hoisting and installation step, the inner deck longitudinal bones 137 and the deck girders 131 have been welded to the bottom of the inner deck 209 to form a sheet structure.

[0058] S8. Repeat step S4 on the second cylinder 120 until the first cylinder 110 is formed. In the embodiment of the present application, the first cylinder 110 includes at least two cylinder layers 140. In the embodiment of the present application, the cylinder layer 140 of the first cylinder 110 is arranged in two layers. The height of the first cylinder 110 is at least 4 meters. The height of the first cylinder 110 in the embodiment of the present application is 4 meters.

[0059] S9. A reinforcement structure is also provided in the first cylinder 110. The reinforcement structure can improve the overall structural rigidity of the first cylinder 110 and improve the load capacity.

[0060] S10, the outer wall of the second cylinder 120 is welded to the hull bulkhead, and the first cylinder 110 is exposed on the hull deck 210. In the embodiment of the present application, the total height of the heavy crane supporting the cylinder base is 13.5 meters. Figure 1 As shown, the outer wall of the second cylinder 120 is welded to the middle longitudinal bulkhead 220 , the inclined bulkhead 230 , and the transverse bulkhead 250 , and part of the outer wall of the second cylinder 120 is welded to the inner bottom plate 240 .

[0061] In the present application embodiment, Figure 3 As shown, the hull deck 210 is divided into 11 sections, which are two symmetrical first cabin areas 211, two symmetrical second cabin areas 212, a third cabin area 213, a fourth cabin area 214, two symmetrical fifth cabin areas 215, and two stacked sixth cabin areas 216. The 11 sections divided by the hull deck 210 are welded with the second cylinder 120 and the bottom section to form various hull cabins.

[0062] Figure 4 What is shown is a preferred embodiment of the present application, in which a schematic diagram of the cylinder wall structure of the heavy crane supporting cylinder base is mainly composed of 7 cylinder layers 140, each cylinder layer 140 is welded by at least 4 splicing pieces 101 of the same specification and shape, and the splicing piece 101 is an arc-shaped plate so that it can be connected end to end to form a ring-shaped cylinder layer 140.

[0063] Among them, Figure 4 and Figure 6 As shown, the vertical welding lines 102 formed by the vertical butt welding of any two layers of cylinder layers 140 are not in the same straight line, the arc circumference distance between the vertical welding lines 102 of two adjacent cylinder layers 140 is greater than 0.3 meters, and all the vertical welding lines 102 close to the same vertical direction are arranged in a stepped manner. That is to say, the vertical welding lines 102 of each cylinder layer are not on the same vertical line, but are staggered by at least 300mm, and the vertical welding lines 102 are distributed in a stepped manner. Although this plate arrangement method will increase the difficulty of construction, it is beneficial to the force of the supporting cylinder base. Similar to pressure vessels, the supporting cylinder wall must avoid cross welds. The stress concentration at the intersection of cross welds can easily lead to material fatigue and cracks, and is not conducive to the uniformity and stability of the cylinder wall structure. The crane base is subject to huge tensile, compressive and bending stresses, and its cylinder wall structure must avoid cross welds.

[0064] Further, such as Figure 5 as well as Figures 7 to 10 As shown, the second cylinder 120 is also provided with a deck girder 131, a cylinder inner deck 209 and a cylinder inner deck longitudinal bone 137. The cylinder inner deck longitudinal bone 137 is a steel hot-rolled profile, and its length direction is parallel to the bow and stern direction of the ship. Its top is welded to the bottom of the cylinder inner deck 209, and its two ends are welded to the inner wall of the second cylinder 120. The deck girder 131 is welded to the bottom of the hull deck 210, and the two ends of the deck girder 131 are respectively welded to the support seat inner cylinder 134 and the second cylinder 120. It should be noted that the first cylinder 110 can be installed only after the hull deck 210 and the deck girder 131 of the top cylinder of the second cylinder 120 are installed.

[0065] In the present application embodiment, Figures 7 to 11 As shown, the reinforcement structure includes a plurality of first reinforcement members 133 and second reinforcement members 132, the first reinforcement members 133 are arranged vertically, and the first reinforcement members 133 are arranged in an array on the inner wall of the second cylinder 120 or the first cylinder 110, the second reinforcement members 132 are annular, and the second reinforcement members 132 are arranged in an array along the vertical direction, and all the first reinforcement members 133 are fixedly connected to the second reinforcement members 132. In addition, in order to ensure the continuity of the first reinforcement member 133 of the crane support cylinder base, it is necessary to avoid the first reinforcement member 133 from having a process break in the horizontal plane as much as possible, so the first reinforcement member 133 of the second cylinder 120 below the hull deck 210 is not provided with a process break, but is installed as a whole. The support cylinder base is the most critical part of the crane ship under stress, and is closely related to the safety of the crane operation, so it is preferred to adopt a manufacturing method that is more favorable to the stress of the crane.

[0066] like Figures 6 to 11As shown, the first reinforcement 133 of the first cylinder 110 extends to the upper surface of the hull deck 210 inside the second cylinder 120, and fits with the highest cylinder layer 140 of the second cylinder 120, so that the joint between the first cylinder 110 and the second cylinder 120 can be more stable.

[0067] The welding of the first reinforcement member 133 and the first cylinder 110 or the second cylinder 120 is also performed by a split-center symmetrical jump welding method. Specifically, Fig.13 As shown, two automatic welding machines (or two welders) are used for welding together, and the operating parameters of the two automatic welding machines are required to be set consistently (the operating skills of the two welders should be relatively close to each other), so that the welding speed is similar to ensure that the heat input energy of the weld is equal. According to the established welding sequence, the vertical fillet welds of the first cylinder 110 or the second cylinder 120 and the first reinforcement 133 are welded in turn by using the method of split-center symmetrical jump welding. Each weld in the cylinder needs to be executed according to the following established sequence: automatic welding machine A (welder A): C1→C2→C3→...→C18; automatic welding machine B (welder B): D1→D2→D3→...→D18.

[0068] The above-mentioned construction process adopts segmentation / slice division to improve the construction accuracy and reduce the deformation caused by welding. In addition, the reasonable arrangement of welds and construction sequence is conducive to ensuring that the welding shrinkage deformation is controllable, optimizing the welding method and welding sequence, and combining precise control of process accuracy to realize the construction of the heavy crane support cylinder base structure of large crane ships.

[0069] In some other embodiments, the heavy crane support cylinder base of a large crane ship can also be constructed in the following manner:

[0070] Construction method 2: The construction method of the second cylinder 120 below the hull deck 210 is similar to the above construction process. The part above the hull deck 210 is reversed with the top of the first cylinder 110 as the bottom, and the first cylinder 110 is constructed by drawing a line on the working surface. The top of the first cylinder 110 is highly consistent with the line drawn on the working surface, and the ellipticity and circumference length accuracy of the upper opening of the entire crane support cylinder base will be easier to control. In addition, the crane support cylinder structure below the hull deck 210 and above the hull deck 210 are constructed separately, and can be constructed at the same time, shortening the period.

[0071] Construction method three: Figure 4As shown, the outer cylinder wall and the supporting structure of the second cylinder 120 are divided into two halves along the vertical welding line 102. In this construction method, the construction of the second cylinder 120 is similar to the construction process disclosed in this application, except that the corresponding structure and the cylinder wall weld at the vertical welding line 102 are not welded first. Since the entire second cylinder 120 is still built as a whole, it can only be disassembled for transportation during transportation. On the one hand, it ensures that the construction accuracy of the second cylinder 120, such as the ellipticity, circumference and verticality of the cylinder axis, is better controlled. On the other hand, the size and weight of each part are reduced after disassembly, which is convenient for lifting. In addition, since the transportation weight and size are reduced, it can be built and manufactured in the workshop without occupying the slipway period, and the working environment is indoors, which is more favorable than outdoor slipway operations. Correspondingly, the first cylinder 110 can also be divided into two halves along the vertical welding line 102 for pre-closing construction.

[0072] Construction methods four and five are to design different pre-closing seams for the heavy crane support cylinder base structure according to the shipyard's resource conditions, so as to further reduce the weight and size of the cylinder structure during transportation. Their construction mode is similar to the above-mentioned construction method.

[0073] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A construction process for a heavy crane support cylinder base of a large crane ship, characterized in that: The heavy crane support cylinder base comprises a first cylinder (110), a second cylinder (120) and a reinforcement structure, and includes the following steps: S1, prefabricating the splicing part (101), positioning the installation position and the calibration reference line of the second cylinder (120) on the bottom plate (260); S2. constructing a support structure at the installation location; S3, a plurality of the splicing pieces (101) are sequentially butted end to end within the verification control line to form an unformed cylinder layer (140), and when the measurement value between the unformed cylinder layer (140) and the verification control line is at a preset value, the butt joints of two adjacent splicing pieces (101) are vertically butt-welded to form a formed cylinder layer (140), and the butt joints between the splicing pieces (101) and the bottom plate (260) are horizontally butt-welded; S4, sequentially butting a plurality of the splicing pieces (101) end to end on the formed cylinder layer (140) to form an unformed cylinder layer (140), so that the measurement value between the unformed cylinder layer (140) and the calibration control line is at a preset value, the butt joints of two adjacent splicing pieces (101) of the unformed cylinder layer (140) are vertically butt-welded, and the borders of the splicing pieces (101) of two adjacent layers of the cylinder layer (140) are horizontally butt-welded; S5, repeating step S4 until the second cylinder (120) is formed; S6. Arranging the reinforcement structure in the second cylinder (120); S7, hoisting the sheet structure of the inner deck (209). Before this hoisting and installation step, the inner deck longitudinal bones (137) and the deck girder (131) have been welded to the lower part of the inner deck (209) to form a sheet structure; S8, repeating step S4 on the second cylinder (120) until the first cylinder (110) is formed; S9, the reinforcement structure is arranged in the first cylinder (110); S10. The outer cylinder wall of the second cylinder (120) is welded to the hull bulkhead, and the first cylinder (110) is exposed on the hull deck (210).

2. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The vertical welding lines (102) formed by vertical butt welding of any two of the cylinder layers (140) are not in the same straight line.

3. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 2, characterized in that: The vertical distance between the vertical welding lines (102) of two adjacent cylinder layers (140) is greater than 0.3 meters.

4. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 3, characterized in that: All the vertical welding lines (102) close to the same vertical direction are arranged in a stepped manner.

5. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The vertical butt welding is performed by adopting a center-symmetrical jump welding method.

6. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The horizontal butt welding is carried out by adopting a center-symmetrical jump welding method.

7. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The reinforcement structure comprises a plurality of first reinforcement members (133) and second reinforcement members (132); the first reinforcement members (133) are vertically arranged, and the first reinforcement members (133) are arranged in an array on the inner wall of the second cylinder (120) or the first cylinder (110); the first reinforcement member (133) spans between the two ends of the second cylinder (120) or the first cylinder (110); the second reinforcement member (132) is annular, and the second reinforcement members (132) are arranged in an array along the vertical direction, and all the first reinforcement members (133) are fixedly connected to the second reinforcement members (132).

8. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 7, characterized in that: The first reinforcement member (133) of the first cylinder (110) extends to fit the inner cylinder wall of the second cylinder (120).

9. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The second cylinder (120) includes at least 5 cylinder layers (140), the first cylinder (110) includes at least two cylinder layers (140), and the height of the first cylinder (110) is at least 4 meters.

10. The process for constructing a heavy crane support cylinder base of a large crane ship according to claim 1, characterized in that: The splicing piece (101) is an arc-shaped plate, and each layer of the cylinder layer (140) includes at least four splicing pieces (101).

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