CN115230903B - Ship body construction process - Google Patents
Ship body construction process Download PDFInfo
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- CN115230903B CN115230903B CN202210906842.8A CN202210906842A CN115230903B CN 115230903 B CN115230903 B CN 115230903B CN 202210906842 A CN202210906842 A CN 202210906842A CN 115230903 B CN115230903 B CN 115230903B
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- Prior art keywords
- bow
- bow door
- door
- hull
- total section
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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
- B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The invention relates to the technical field of hull construction, and discloses a hull construction process, which comprises the following steps: s1, providing a plurality of bow door hull sections; s2, welding a plurality of bow door hull sections by a total group to obtain a bow door total section, and forming a bow door contour line; s3, supporting a bow door total section; s4, installing two hinges on the bow door block, and connecting the input ends of the two hinges with the output end of a hydraulic system on the bow door block, wherein the output ends of the two hinges are connected with the inner side wall of a ship body outer plate of an inner area surrounded by the outline of the bow door; s5, cutting a hull plate of a bow door total section along a bow door contour line; s6, driving the two hinges to enable the two bow doors to open and close for a plurality of times; s7, a conformal assembly is arranged on the bow door total section; s8, hoisting a bow door block, and enabling the bow door block to enter a dock for folding to form a ship body; s9, removing the conformal assembly. The invention reduces the occupied time of ship body construction to the dock, reduces the ship manufacturing cost and ensures the safety.
Description
Technical Field
The invention relates to the technical field of hull construction, in particular to a hull construction process.
Background
The plurality of hull sections are grouped together on the ground to form a hull section, and the plurality of hull sections are moved to the dock and folded within the dock to form the hull. In the dock, after the ship body is folded, a hydraulic device for driving a bow door is arranged on the ship body; after the hydraulic device is debugged, the hull planking of the bow door block is cut to form the bow door.
According to the ship body building method provided by the prior art, after the bow door is cut and molded, the ship body outer plates near the bow door are deformed, a certain time is consumed for trimming the ship body outer plates, the duration of the ship body in a dock is prolonged, and the site cost is increased; meanwhile, the number of the dock is limited, the time that each ship occupies the dock is long, and the construction efficiency of each ship is also affected. After the ship body total sections are folded, the height of the bow door total sections is higher, the height of the scaffold required by processing and debugging of the bow door is increased, the material cost and the time cost for building the scaffold are increased, and the ship body building cost is increased. Furthermore, the debris created when cutting the hull planks affects the environment within the dock, increasing the cost of cleaning the dock. In order to accelerate the occupied time of the dock, the operation of cutting the bow door at high altitude and the operation of debugging other equipment on the ship body are usually carried out in the dock at the same time, so that the safety of debugging personnel is reduced.
Based on this, there is a need for a hull construction process to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a ship body building process, which is used for reducing the occupied time of ship body building on a dock, reducing the ship building cost and ensuring the safety.
To achieve the purpose, the invention adopts the following technical scheme:
a hull construction process comprising:
s1, providing a plurality of bow-gate ship body sections, and marking bow-gate contour line segments on the bow-gate ship body sections;
s2, welding a plurality of bow door hull sections in a total group to obtain a bow door total section, wherein the bow door profile sections are connected end to end on the bow door total section to form a bow door profile;
s3, supporting the bow door block on a supporting component;
s4, installing two hinges on the bow door block, and connecting the input ends of the two hinges with the output end of a hydraulic system on the bow door block, wherein the output ends of the two hinges are connected with the inner side wall of a ship body outer plate of an inner area surrounded by the outline of the bow door;
s5, cutting a ship body outer plate of the bow door total section along the bow door contour line to form two bow doors, wherein the output ends of the two hinges are respectively and correspondingly connected to the inner side walls of the two bow doors;
s6, driving the two hinges to enable the two bow doors to open and close for a plurality of times;
s7, a shape-preserving component is arranged on the bow door total section and comprises a plurality of shape-preserving flat irons arranged along the bow door contour line, one end of each shape-preserving flat iron is connected with the outer side wall of the bow door in a closed position, and the other end of each shape-preserving flat iron is connected with the outer side wall of a hull outer plate positioned outside the bow door contour line;
S8, hoisting the bow door block into a dock for folding to form a ship body;
s9, removing the conformal assembly.
As an alternative solution of the hull construction process, in step S4, before the input end of the hinge is connected to the output end of the hydraulic system on the bow door block, the method further comprises: the input end of the hydraulic system is connected with the temporary hydraulic cabin opening pump station, and the hydraulic system is debugged;
in step S6, the temporary hydraulic cabin opening pump station is used to drive the two hinges to act, so as to realize the multiple opening and closing of the two bow doors.
As an optional technical scheme of the hull construction process, after the step S3, a lifting unit is arranged on a deck of the bow door block, the lifting unit comprises lifting lugs, two lifting units are arranged, and the two lifting units are respectively arranged on two opposite sides of the center of gravity of the bow door block along the ship length direction.
As an optional technical scheme of the hull construction process, the lifting unit comprises two lifting components which are arranged at intervals along the width direction of the ship, the two lifting components in the same lifting unit are symmetrically arranged about the center line of the hull, and the lifting components comprise a plurality of lifting lugs.
As an alternative technical scheme of the hull construction process, after the step S1, the method further comprises the step of covering steel bars on the hull outer plates along the outline line segments of the bow door;
in step S5, before cutting the hull external plates of the fore door block, the method further comprises dismantling the steel bars.
As an optional technical scheme of a hull construction process, in the step S1, before being covered with steel bars, the method further comprises the step of marking a plurality of monitoring lines on the outline of the bow door, wherein the plurality of monitoring lines are arranged at intervals along the outline of the bow door, the intersection point between the monitoring lines and the outline of the bow door is a monitoring point, and the initial position of the monitoring point is measured by using a total station;
in step S5, before cutting the hull external plate of the fore-door total section and after dismantling the steel bar, measuring the actual position of the monitoring point by using a total station, comparing the coordinates of the actual position and the coordinates of the initial position of the same monitoring point, and if the difference between the coordinates of the actual position and the coordinates of the initial position of any monitoring point exceeds the preset range, correcting the fore-door contour line at the monitoring point to smooth the fore-door contour line, otherwise, cutting the hull external plate of the fore-door total section.
As an optional technical scheme of hull construction technology, in step S3, the supporting component comprises a high-level support and a low-level support, the bottom of the bow door block is connected to the top of the low-level support, a plurality of high-level supports are arranged along the circumferential interval of the hull outer plate of the bow door block, one high-level support is arranged at the front end of the bow door block, a group of high-level support groups are respectively arranged on two sides of the bow door block along the width direction, each high-level support group comprises a plurality of high-level supports arranged along the hull outer plate at intervals, the bottoms of the high-level supports and the bottoms of the low-level supports are connected to the working ground, and the top ends of the high-level supports are connected to the upper end of the hull outer plate.
As an alternative technical scheme of the hull construction process, setting the high-level support with the largest vertical distance from the center line of the hull as a reference support, setting the plane along the ship length direction, where the center of gravity of the bow door block is located, as a first plane, and taking the plane along the ship width direction, where the center of gravity is located, as a second plane, taking a reference point in the second plane, wherein the reference point is located on the working ground, and the vertical distance between the reference point and the center line of the hull is the same as the vertical distance between the center point of the bottom of the reference support and the center line of the hull, and supporting the bow door block on a support assembly:
When the two bow doors are not opened, in the first plane, an included angle between a vertical line where the gravity center is located and a lowest point of the gravity center and the bottom of the bow door total section is larger than 7 degrees, and in the second plane, an included angle between the vertical line and the gravity center and a connecting point is larger than 7 degrees;
when both the bow doors are opened, in the first plane, the included angle between the vertical line and the connecting line between the gravity center and the lowest point of the bottom of the bow door total section is larger than 7 degrees;
when only one of the bow doors is opened, in the second plane, the included angle of the connecting line between the vertical line and the gravity center and the datum point is larger than 7 degrees.
As an alternative technical scheme of the hull construction process, in step S5, when the hull outer plate of the bow door block is cut, the hull outer plate is synchronously and symmetrically cut at the left side and the right side of the center line of the hull;
and/or in the step S5, when the hull planking of the bow door total section is cut, cutting the corner of the bow door contour line, the straight line section between two adjacent corners and the center seam of the bow door contour line sequentially from front to back.
As an alternative technical solution of the hull construction process, the profile-preserving assembly further comprises a first inner profile-preserving member, wherein the first inner profile-preserving member is positioned at the inner side of the bow door total section and is connected between the inner side wall of the bow door and the locking arm on the hinge; and/or the number of the groups of groups,
The profile-preserving component further comprises a second inner profile-preserving piece which is vertically arranged, is positioned on the inner side of the bow door total section and is connected between the inner side wall of the bow door and the strong structure on the lower surface of the deck; and/or the number of the groups of groups,
the profile-preserving assembly further comprises a third inner profile-preserving piece which is horizontally arranged, the third inner profile-preserving piece is positioned on the inner side of the bow door total section, and two ends of the third inner profile-preserving piece are respectively connected to the inner side walls of the two bow doors; and/or the number of the groups of groups,
the profile-preserving component further comprises a fourth inner profile-preserving piece which is vertically arranged, and the fourth inner profile-preserving piece is located on the inner side of the bow door total section and connected between the bottom of the bow door and the bottom edge of the bow door frame.
The invention has the beneficial effects that:
according to the ship body building process, after the bow door total sections are assembled into the bow door total sections, and before the bow door total sections enter the dock, the bow door total sections on the working floor are cut and processed in the total assembly stage, and the hinges capable of opening and closing the bow doors are arranged, so that the bow doors can be opened and closed before entering the dock, the processing and debugging of the bow doors after entering the dock are avoided, the occupied time of the dock is shortened, the production and building time of the ship body in the dock stage is shortened, and the site cost is reduced. And the bow door total section carries out cutting processing and debugging of the bow door on the working ground, can utilize longer time to process and debug the bow door, reduce because consider the limit of the maximum allowed duration of the processing procedure and debugging process of field cost to the bow door, do benefit to the accuracy of guaranteeing the processing accuracy and debugging of bow door, the required scaffold height of processing and debugging to the bow door has also been reduced, material cost and time cost of setting up the scaffold, the cost of hull construction has been saved, the influence of the piece that produces when cutting the hull planking to the dock environment has been reduced again, the cost of cleaning the dock has also been avoided carrying out the operation of high altitude cutting bow door and equipment debugging in the dock simultaneously, the security of debugging personnel has been guaranteed. Before the hull planking is cut to form the bow door, utilize supporting component to support the bow door total track, can reduce the risk that the bow door total track emptys and leads to the hull planking damaged when the bow door opens, guaranteed the qualification rate of bow door total track, also guaranteed the security of hull construction. The bow door and the hull planking are connected by adopting the shape-preserving component before the bow door segment is hoisted to the dock, so that the bow door can be prevented from moving relative to the hull planking in the hoisting process and colliding with other structures of the hull, the structural strength of the bow door segment is weakened and the possibility of deformation of the bow door segment in the hoisting process is reduced due to the opening structure formed by the hull planking at the bow door, the qualification rate of the bow door and the bow door segment is ensured, the requirement for maintaining the bow door segment in the dock is reduced, and the construction cost of the hull is further reduced.
Drawings
FIG. 1 is a flow chart of a hull construction process provided by an embodiment of the present invention;
FIG. 2 is a schematic view of a total section of a fore door according to an embodiment of the present invention;
FIG. 3 is a schematic view of a fore door contour provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a fore door contour line and a monitoring line provided by an embodiment of the present invention;
FIG. 5 is a schematic view of a structure of a header and support assembly of a fore door provided by an embodiment of the present invention;
FIG. 6 is a top view of a fore door header and support assembly provided by an embodiment of the present invention;
FIG. 7 is a schematic view of a first angle of stability provided by an embodiment of the present invention;
FIG. 8 is a schematic view of a second angle of stability provided by an embodiment of the present invention;
FIG. 9 is a schematic view of a lifting assembly provided by an embodiment of the present invention on a bow door header;
FIG. 10 is a schematic view of a temporary hydraulic cabin opening pump station connected to a rear bow door block of a hydraulic system according to an embodiment of the present invention;
FIG. 11 is a schematic view of a first view of a conformal flat iron provided in an embodiment of the present invention disposed on a header section of a bow door;
fig. 12 is a schematic view of a structure of a second view of a conformal flat iron provided by an embodiment of the present invention disposed on a header section of a bow door.
In the figure:
10. a work floor;
1. A bow door hull section; 2. a stem door total section;
3. a bow door contour line; 31. a U-shaped structural wire; 311. a corner; 312. a straight line segment; 32. a center seam;
4. a bow door; 5. a conformal flat iron; 61. high-level support; 62. a low-level support; 63. auxiliary support;
7. a monitoring line; 8. a lifting assembly; 81. lifting lugs; 9. temporary hydraulic cabin opening pump station.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The embodiment provides a hull construction process. Specifically, as shown in fig. 1 to 12, the hull construction process includes:
s1, providing a plurality of bow-gate ship body sections 1, and marking bow-gate contour line segments on the bow-gate ship body sections 1;
s2, a plurality of bow door hull sections 1 are welded in a total group to obtain a bow door total section 2, and bow door contour line segments are connected end to end on the bow door total section 2 to form a bow door contour line 3;
S3, supporting the bow door total section 2 on a supporting component;
s4, installing two hinges on the bow door total section 2, and connecting the input ends of the two hinges with the output end of a hydraulic system on the bow door total section 2, wherein the output ends of the two hinges are connected with the inner side wall of an inner area, which is defined by the hull outer plate corresponding to the bow door contour line 3;
s5, cutting the hull plates of the bow door total section 2 along the bow door contour line 3 to form two bow doors 4, wherein the output ends of the two hinges are respectively and correspondingly connected to the inner side walls of the two bow doors 4;
s6, driving the two hinges to enable the two bow doors 4 to open and close for a plurality of times;
s7, a shape-preserving component is arranged on the bow door total section 2 and comprises a plurality of shape-preserving flat irons 5 arranged along the bow door contour line 3, one end of the shape-preserving flat irons 5 is connected with the outer side wall of the bow door 4 at the closed position, and the other end of the shape-preserving flat irons is connected with the outer side wall of the hull outer plate positioned outside the bow door contour line 3;
s8, hoisting the bow door total section 2 into a dock for folding to form a ship body;
s9, removing the conformal assembly.
According to the hull construction process provided by the embodiment, after the bow door hull sections 1 are assembled to form the bow door total section 2, and before the bow door total section 2 enters the dock, the bow door total section 2 on the working floor 10 is cut and processed in the total assembly stage, and the hinge capable of opening and closing the bow door 4 is installed, so that the bow door 4 can be opened and closed before entering the dock, the processing and debugging of the bow door 4 after entering the dock are avoided, the occupied time of the dock is reduced, the production and construction time of the hull in the dock stage is shortened, and the field cost is reduced. And the bow door total section 2 carries out cutting processing and debugging of the bow door 4 on the working ground 10, can utilize longer time to process and debug the bow door 4, reduce because consider the limit of the maximum allowed duration of the processing course and debugging process of the field cost to the bow door 4, do benefit to the accuracy of guaranteeing the processing accuracy and debugging of the bow door 4, also reduced the height of the scaffold needed when processing and debugging the bow door 4, save the material cost and time cost of setting up the scaffold, save the cost of hull construction, reduce the influence of the piece that produces when cutting the hull planking to the dock environment again, reduced the cost of clearing up the dock, also avoided carrying out the operation of high altitude cutting the bow door 4 and equipment debugging in the dock simultaneously, guaranteed the security of debugging personnel. Before the hull planking is cut to form the bow door 4, utilize supporting component to support bow door total segment 2, can reduce the risk that bow door total segment 2 emptys and lead to the hull planking damaged when bow door 4 opens and shuts, guaranteed the qualification rate of bow door total segment 2, also guaranteed the security of hull construction. The bow door 4 and the hull planking are connected by adopting the shape-preserving component before the bow door segment 2 is hoisted to the dock, so that the bow door 4 can be prevented from moving relative to the hull planking and colliding with other structures of the hull in the hoisting process, the structural strength of the bow door segment 2 is reduced due to the opening structure formed by the hull planking at the bow door 4, the possibility that the bow door segment 2 is deformed in the hoisting process is also reduced, the qualification rate of the bow door 4 and the bow door segment 2 is ensured, the requirement for maintaining the bow door segment 2 in the dock is reduced, and the building cost of the hull is further reduced.
In general, two bow doors 4 are provided on the hull, an opening is provided on the hull outer plate of the bow door block 2, the two bow doors 4 are arranged in the opening side by side along the width direction, and the two bow doors 4 can move along the width direction toward a direction away from each other to realize opening of the bow doors 4. Normally, the fore door 4 moves towards the stern synchronously when being opened, namely the fore door 4 on the left moves towards the left rear, and the fore door 4 on the right moves towards the right rear. The bow door 4 is connected to the bow door block 2 through a hinge, the output end of the hinge is connected to the bow door 4, and the input end of the hinge is connected to the output end of the hydraulic system on the ship body. After the bow door total section 2 and the total sections at other parts of the ship body are folded to form the ship body, a hydraulic pump is installed in the ship body, the input end of a hydraulic system is connected with the hydraulic pump on the ship body, and the hydraulic pump provides power for the hinge through the hydraulic system so as to drive the bow door 4 to be opened or closed. The structure of the hinge, the installation position of the hinge on the hull, the connection position between the hinge and the bow door 4, and the specific structure of the hydraulic system may refer to the hull structure in the prior art, which is not the protection focus of the embodiment, and is not limited herein.
When the fore door 4 is positioned in the opening, the fore door 4 is in a closed position. The two sides of the bow doors 4 facing each other in the closed position are mutually attached and close the opening. When the fore door 4 is moved to be separated from the opening, the fore door 4 is in the opening position. When both bow doors 4 are in the open position, the inside of the bow door block 2 is communicated with the outside through the opening.
The above and the following descriptions of the azimuth directions such as the front, back, left, right, and vertical directions are all based on the direction in which the hull is in the normal sailing state. For example, the bow is located on the front side of the hull and the stern is located on the rear side of the hull.
The bow door contour 3 comprises a square-frame-shaped outer contour, which comprises a lower frame line and an upper frame line parallel to the deck. The middle part of the outer contour is provided with a middle seam 32, the middle seam 32 is connected with the middle point of the upper frame line and the middle point of the lower frame line of the outer contour, and the middle seam 32 and the center line of the ship body are positioned in the same vertical plane. The middle seam 32 separates the outline into two U-shaped structural wires 31 with opposite openings, the U-shaped structural wires 31 comprise two side arms which are oppositely arranged along the height direction of the ship body and a connecting arm connected between the two side arms, corners 311 are arranged between the connecting arm and the side arms, the side arm positioned above in the two side arms is a straight line segment 312, the connecting arm is a straight line segment 312, and the side arm positioned below in the two side arms can be a straight line segment 312 or a broken line segment. If the lower side arm of the two side arms is a broken line segment, the lower side arm comprises a plurality of straight line segments 312, and two adjacent straight line segments 312 are connected through a corner 311. The upper side arms of the two U-shaped structural wires 31 are connected to form an upper frame wire of the outer contour, the lower side arms of the two U-shaped structural wires 31 are connected to form a lower frame wire of the outer contour, and the corners 311 are connected between the lower side arms of the two U-shaped structural wires 31.
The hull construction process provided by the present embodiment is described in detail below. The hull construction process includes:
s1, providing a plurality of bow door hull sections 1, and marking bow door contour line segments on the bow door hull sections 1.
Specifically, paint is used for marking a bow door profile line segment on the bow door hull section 1, and when all the bow door hull sections 1 pass through a total group to form a bow door total section 2, all the bow door profile line segments can be connected end to form a bow door profile line 3.
Preferably, after step S1, the method further comprises covering the hull outer plate with steel bars along the outline line of the fore door. The steel bars are utilized to protect the outline line segments of the bow doors, the outline line segments of the bow doors are prevented from being scraped and rubbed off by the bow door hull segments 1 in the process of the total assembly, the accuracy of the cutting positions of the subsequent bow doors 4 is ensured, the large-area restoration of the outline line 3 of the bow doors before the hull outer plates are cut is avoided, and the production and construction efficiency of the hull is improved. Specifically, the steel bars are welded with the hull planks.
Preferably, in step S1, before being covered with the steel bar, the method further comprises marking a plurality of monitoring lines 7 on the fore door contour line 3, the plurality of monitoring lines 7 are arranged at intervals along the fore door contour line 3, the intersection point between the monitoring lines 7 and the fore door contour line 3 is a monitoring point, and the initial position of the monitoring point is measured by using the total station. The monitoring line 7 is arranged, and the three-dimensional space coordinates of the monitoring points in each stage of hull construction can be measured through the total station, so that the outline 3 of the bow door at the position can be conveniently adjusted according to the movement of the monitoring points, the dimensional accuracy of the bow door 4 is ensured, and the yield of the bow door total section 2 and the hull is ensured. In this embodiment, the monitoring line 7 is located on the straight line segment 312 and the middle slit 32, and the monitoring line 7 is vertically disposed between the straight line segment 312 or the middle slit 32. Since the steel bar has a width, the steel bar can cover the monitoring points, so that the monitoring points are prevented from being erased, and the length of the monitoring line 7 can be the same as or different from the width of the steel bar.
S2, welding a plurality of bow door hull sections 1 in a total group to obtain a bow door total section 2, and connecting bow door profile line sections on the bow door total section 2 end to form a bow door profile line 3.
Specifically, two adjacent bow door hull sections 1 are connected by welding.
In this embodiment, the number of the bow-door hull sections 1 is eight, the sequence numbers of the bow-door hull sections 1 are F031, F232, F322, F252, F352, F051, F050, and W091, the F031, F232, and F322 are taken as bottom layer sections, and the F252, F352, F051, F050, and W091 are placed above the F031, F232, and F322, and the total group sequence of the specific bow-door hull sections 1 is: F031→F322→F232→F252→F352→F051→F050→W091. In other embodiments, the numbers of the bow-door hull sections 1 may be other numbers, the relative positions of the bow-door hull sections 1 may be adaptively adjusted, and the total sequence of the bow-door hull sections 1 may be other sequences, which are not limited herein.
S3, supporting the bow door total section 2 on a supporting component.
Preferably, in step S3, the support assembly includes a high-level support 61 and a low-level support 62, the bottom of the bow door block 2 is connected to the top of the low-level support 62, the high-level support 61 is provided with a plurality of high-level supports 61 along the circumferential interval of the hull outer plates of the bow door block 2, the front end of the bow door block 2 is provided with a high-level support 61, two sides of the bow door block 2 along the ship width direction are respectively provided with a group of high-level support groups, each high-level support group includes a plurality of high-level supports 61 arranged along the hull outer plates at intervals, the bottoms of the high-level supports 61 and the bottoms of the low-level supports 62 are both connected to the working floor 10, and the top ends of the high-level supports 61 are connected to the upper ends of the hull outer plates. Because the bottom contour of the fore door header 2 is generally not in one plane. The low-level support 62 can be connected between the bow door block 2 and the working ground 10, so that relative movement of the bow door block 2 relative to the working ground 10 is avoided, the safety of hull construction is guaranteed, the deck level of the bow door block 2 can be realized by adjusting the heights of the low-level supports 62 at different positions, the bow door block 2 is prevented from toppling over, and the safety of hull construction is further guaranteed. The high-level support 61 is arranged, the bow door block 2 can be supported at a higher position, the support position for the bow door block 2 is increased, and the bow door block 2 is prevented from toppling over in the process of cutting a hull outer plate to form the bow door 4, so that the safety is ensured, the qualification rate of the bow door block 2 is also ensured, the bow door block 2 is prevented from being maintained in a dock, and the site cost is saved.
In the embodiment, the lowest point of the bottom of the bow door total section 2 is connected with a low-level support 62. Three high-level supports 61 are arranged in the same high-level support group, and as can be seen from the foregoing, one high-level support 61 is arranged at the front end of the fore-door main section 2, that is to say, seven high-level supports 61 are arranged in total, and the positions of the seven high-level supports 61 need to ensure that the opening and closing of the fore-door 4 are not interfered. The high-level support 61 is a vertically arranged steel frame structure and is connected with the working ground 10 and the hull outer plates of the bow door block 2 through welding. The low-level support 62 is a cement pier body comprising vertical setting, the top surface and the bottom surface of the cement pier body are fixedly provided with metal pieces, and the metal pieces are connected with the bottom surface of the bow door block 2 and the working ground 10 through welding. F322 and F232 are arranged along the ship width direction, F031 is positioned at one end of F322 and F232 facing the ship bow, the bottom of F031 is lower than the bottom of F322 and F232, so the height of the low-level support 62 at the bottom of F031 is smaller than the height of the low-level support 62 at the bottom of F322 and F232. The lowest point of the bottom of the bow door total section 2 is positioned at the bottom of F031.
In this embodiment, the two sides of the stem section 2 along the width direction are respectively provided with three high-level supports 61, and the three high-level supports 61 positioned on the left side of the stem section 2 are arranged opposite to the three high-level supports 61 positioned on the right side of the stem section 2 one by one along the width direction. And the distance between the corresponding two high supports 61 and the hull centerline is the same. The distances between the three high supports 61 in the same high support group and the center line of the hull are all different.
In other embodiments, the low-level supports 62 may be steel frame structures, the number of the high-level supports 61 in the same high-level support group may be adaptively adjusted according to the size of the bow door block 2, and the plurality of high-level supports 61 in the same high-level support group may be arranged at intervals along the ship length direction, which is not limited herein.
Further, the support assembly further includes an auxiliary support 63, and both sides of the lower support 62 in the ship width direction may be provided with the auxiliary support 63. The auxiliary support 63 is a vertically arranged steel frame structure, the bottom end of the auxiliary support is connected to the working ground 10, the top end of the auxiliary support is supported at the lower end of the hull outer plate, the support position of the bow door block 2 is further increased, the bow door block 2 is further prevented from toppling, and the safety is guaranteed. The auxiliary support 63 is not connected with the ship body outer plate, so that the work of separating the ship body outer plate from the auxiliary support 63 before moving the bow door block 2 is reduced, and the efficiency of ship body construction is improved. Still further, the lower end of the hull outer plate at the front end of the fore door header 2 may also be supported on the auxiliary support 63.
In the present embodiment, the high-level support 61 having the largest vertical distance from the center line of the hull is set as the reference support, the plane in the ship length direction in which the center of gravity of the bow door header 2 is located is set as the first plane, the plane in the ship width direction in which the center of gravity is located is set as the second plane, the reference point is taken in the second plane, the reference point is located on the work floor 10, and the vertical distance between the reference point and the center line of the hull and the vertical distance between the center point of the bottom of the reference support and the center line of the hull are the same. The three high supports 61 positioned on the left side of the bow door total section 2 and the three high supports 61 positioned on the right side of the bow door total section 2 are arranged in a one-to-one opposite mode along the ship width direction, namely, the datum supports are respectively arranged on two sides of the bow door total section 2.
Specifically, after supporting the fore door header 2 on the support assembly:
after the bow doors 4 are cut and formed, and when the two bow doors 4 are not opened, in a first plane, an included angle between a vertical line of the center of gravity of the bow door total section 2 and a connecting line between the center of gravity of the bow door total section 2 and the lowest point of the bottom of the bow door total section 2 is a first stability angle alpha, the first stability angle alpha is 7 degrees, and in a second plane, an included angle between a vertical line of the center of gravity of the bow door total section 2 and a connecting line between the center of gravity of the bow door total section 2 and a datum point is a second stability angle beta, and the second stability angle beta is 7 degrees. The first stability angle alpha >7 and the second stability angle beta >7 are the range requirements of the stability angles regulated in the ship industry. In this embodiment, the lowest point of the bottom of the fore door header 2 is located on the front side of the center of gravity of the fore door header 2.
After the cut forming of the bow doors 4, and when both bow doors 4 are opened, both bow doors 4 move in opposite directions in the ship width direction at the same time, and both bow doors 4 move backward in the ship length direction, that is, the center of gravity of the bow door header 2 does not move in the ship width direction but moves in the ship length direction. When both bow doors 4 are opened, the center of gravity of the bow door header 2 may move forward or backward in the ship length direction, that is, the vertical line in which the center of gravity of the bow door header 2 is located may move forward or backward. If the center of gravity of the total section 2 of the fore door is gradually moved forward with both fore doors 4 open, the first stability angle α gradually becomes smaller, i.e. the first stability angle α is at a minimum when both fore doors 4 are fully open. If the center of gravity of the total section 2 of the fore-door is gradually moved backward when both fore-doors 4 are opened, the first stability angle α gradually becomes larger, i.e., the first stability angle α is maximum when both fore-doors 4 are fully opened. In the first plane, the included angle between the vertical line where the gravity center of the bow door total section 2 is located and the gravity center of the bow door total section 2 and the lowest point at the bottom of the bow door total section 2 is larger than 7 degrees, namely, the first stability angle alpha is larger than 7 degrees, so that the first stability angle alpha always meets the stability angle range in the process of opening the bow door 4 and after the bow door 4 is completely opened, the bow door total section 2 can be stably supported by the supporting component, and the possibility that the bow door total section 2 is toppled when the bow door 4 is opened and closed is reduced.
After the bow doors 4 are cut and formed, and when only one of the bow doors 4 is opened, the center of gravity of the bow door header 2 is moved in the ship width direction and also in the ship length direction. However, compared with the case where both of the bow doors 4 are opened, in the case where only one of the bow doors 4 is opened, the movement distance of the center of gravity of the bow door header 2 in the ship length direction is smaller, so in the ship length direction, if the first stability angle α when both of the bow doors 4 are opened satisfies the range requirement of the stability angle, then only the first stability angle α when one of the bow doors 4 is opened must satisfy the range requirement of the stability angle. Taking a state that only the left side bow door 4 is opened as an example, after the left side bow door 4 is opened in the ship width direction, the center of gravity of the bow door block 2 moves left, and a second stability angle beta formed on the left side of the center of gravity is smaller than a second stability angle beta formed on the right side of the center of gravity. In the second plane, the connecting line between the vertical line where the center of gravity of the bow door total section 2 is located and the center of gravity and the reference point of the bow door total section 2 is larger than 7 degrees, namely, the second stability angles beta on the left side and the right side of the center of gravity meet the second stability angle beta of 7 degrees, so that the second stability angle beta always meets the stability angle range in the process of opening the bow door 4 and after the bow door 4 is completely opened, the bow door total section 2 can be stably supported by the supporting component, and the possibility that the bow door total section 2 is toppled when the bow door 4 is opened and closed is reduced.
Specifically, as shown in fig. 7 and 8, the center of gravity of the stem section 2 is a point O, and the vertical line in which the center of gravity of the stem section 2 is located is a straight line L. In the first plane, the lowest point at the bottom of the bow door total section 2 is a point M, the connecting line between the gravity center of the bow door total section 2 and the lowest point at the bottom of the bow door total section 2 is a point O and a connecting line K between the points M, and the included angle between the connecting line K and the straight line L is a first stability angle alpha. In the second plane, the datum point is a point Q, the connecting line between the center of gravity of the bow door total section 2 and the datum point is a point O and a connecting line P between the points Q, and the included angle between the connecting line P and the straight line L is a second stability angle beta.
In the present embodiment, when both of the fore doors 4 are not opened, both of the fore doors 4 are in the closed position, the first stability angle α=38.7°, and the second stability angle β=50.7°. When both bow doors 4 are opened, both bow doors 4 are in the opened position, the center of gravity of the bow door header 2 is moved forward in the ship length direction, and the first stability angle α=36.9°. When only one of the bow doors 4 is opened, the center of gravity of the bow door header 2 is shifted 240mm in the ship width direction, and the smaller second stability angle β=50.2° of the two second stability angles β of the center of gravity of the bow door header 2.
Preferably, after step S3, a lifting unit is further disposed on the deck of the bow door block 2, the lifting unit includes a lifting lug 81, the lifting lug 81 is connected to the deck, two lifting units are disposed, and the two lifting units are disposed on two opposite sides of the center of gravity of the bow door block 2 along the ship length direction. By arranging the hoisting unit, after the cutting processing of the bow door 4 is completed, the bow door block 2 can be hoisted and moved by a crane. After the support assembly is utilized to support the bow door section 2, a lifting unit is arranged on the bow door section 2, so that the stability of the bow door section 2 can be ensured in the process of connecting lifting lugs 81 on the deck, the possibility of toppling of the bow door section 2 is reduced, and the safety and the qualification rate of the bow door section 2 are ensured.
In this embodiment, the distances between the two lifting units and the center of gravity of the bow door header 2 along the ship length direction may be the same or different, so that the crane can be ensured to stably lift the bow door header 2 through the lifting lugs 81, which is not limited herein.
Further, each lifting unit comprises two lifting components 8 which are arranged at intervals along the ship width direction, the two lifting components 8 in the same lifting unit are symmetrically arranged about the center line of the ship body, and each lifting component 8 comprises a plurality of lifting lugs 81. Above-mentioned structure sets up, and the quantity of lug 81 is more, and is four at least, and the lug 81 that all can set up in every unit department of lifting by crane all can be followed the both sides of the ship width direction lifts up the bow door total section 2, has further guaranteed the steady degree of hoist and mount bow door total section 2, has reduced the possibility that bow door total section 2 drops in the hoist and mount in-process, has guaranteed the security of hull construction and the qualification rate of bow door total section 2. In this embodiment, each lifting assembly 8 comprises eight lifting lugs 81.
S4, installing two hinges on the bow door total section 2, and connecting the input ends of the two hinges with the output end of a hydraulic system on the bow door total section 2, wherein the output ends of the two hinges are connected with the inner side wall of a ship body outer plate of an inner area surrounded by the bow door contour line 3.
Specifically, after the hull plate is cut along the center seam 32 and one of the U-shaped structural lines 31, a bow door 4 can be formed, and the output end of the hinge is connected to the inner side wall of the hull plate at the position where the bow door 4 is opened. The structure of the hinge, the installation position of the hinge, and the connection structure between the hinge and the bow door 4 all adopt the prior art, and are not described herein.
In step S4, before the input end of the hinge is connected to the output end of the hydraulic system on the bow door header 2, the method further comprises: the input end of the hydraulic system is connected with the temporary hydraulic cabin opening pump station 9, and the hydraulic system is debugged. Because the hydraulic pump on the ship body needs to be placed on the ship body after being folded in the dock, the hydraulic system is independently debugged by utilizing the temporary hydraulic cabin opening pump station 9 before the bow door 4 is cut and formed, the hinge and the bow door 4 formed by cutting can be prevented from moving in the process of debugging the hydraulic system, if the hydraulic system has a problem, the risk of collision between the bow door 4 and other structures is increased, the possibility of deformation of the bow door 4 is increased, and the qualification rate of the bow door 4 and the bow door total section 2 is reduced.
In this embodiment, the temporary hydraulic cabin opening pump station 9 is placed on the working floor 10, but also on the bow door header 2.
S5, cutting the hull plates of the bow door total section 2 along the bow door contour line 3 to form two bow doors 4, wherein the output ends of the two hinges are respectively and correspondingly connected with the inner side walls of the two bow doors 4.
Specifically, the hull outer plate is cut along the center slit 32 and the U-shaped structural line 31 by using a guide rail type semiautomatic flame cutting machine, to form two bow doors 4. When the hull planking is cut, adopt the overhead traveling crane to lift the cutting personnel to the front side position of bow door total section 2, cooperate the scaffold frame to carry out the cutting shaping of bow door 4.
In this embodiment, the hinge is provided with a rotation shaft, and the opening and closing of the bow door 4 are all rotated around the rotation shaft. After being cut along the U-shaped structural line 31, a door gap with the width of 20mm is formed, and enough movement space is provided for the rotation of the bow door 4 around the rotating shaft on the hinge.
Preferably, in step S5, when the hull external plates of the fore door block 2 are cut, the cuts are symmetrically made at the left and right sides of the hull center line in synchronization. In the cutting process, if the hull planking is cut along the bow door contour line 3 on one side of the hull center line, the hull planking can generate certain deformation, and when the hull planking is cut along the bow door contour line 3 on the other side of the hull center line, the hull planking is deformed again, and the two deformations can be overlapped, so that the opening shape formed on the hull planking is greatly different from the shape of the bow door contour line 3 finally, the qualification rate of the bow door 4 and the bow door total section 2 is reduced, and the smooth opening and closing of the bow door 4 are not facilitated. If the ship body center line is cut synchronously and symmetrically at the left side and the right side, the stress and the deformation generated at the two sides of the ship body center line can be offset to a certain extent, the deformation generated when the ship body outer plate is cut is reduced, the smooth opening and closing of the bow door 4 are facilitated, the qualification rate of the bow door 4 and the bow door total section 2 is ensured, the cutting time length can be shortened, and the building efficiency of the ship body is ensured.
Specifically, in step S5, when the hull plate of the fore door header 2 is cut, the straight line segment 312 at the corner 311 of the fore door contour line 3 and between the adjacent two corners 311, and the center seam 32 of the fore door contour line 3 are cut sequentially from front to back. I.e. the corners 311 on the outer contour of the fore door contour 3 and the straight line sections 312 between adjacent two corners 311 are cut first, and then the centre joint 32 is cut. When the corner 311 is cut, the deformation of the ship body outer plate is complex, and after the corner 311 is cut, the straight line section 312 is cut, so that the cutting direction can be adjusted adaptively during cutting, the straightness of the straight line section 312 is ensured, and the qualification rate of the bow door 4 is ensured.
In the present embodiment, the lower side arm of the two side arms of the U-shaped structural wire 31 is a broken line segment. The corner 311 between the upper side arm and the connecting arm of the two side arms of the U-shaped structural wire 31 is cut, the corner 311 between the lower side arm and the connecting arm of the two side arms of the U-shaped structural wire 31 is cut, the corner 311 of the lower side arm of the two side arms of the U-shaped structural wire 31 is cut, the straight line segment 312 of the side arm and the connecting arm is cut, and the middle seam 32 is cut.
In step S5, before the hull planking of the bow door block 2 is cut, the steel bars are removed, the bow door contour line segments are exposed, and the hull planking is cut along the bow door contour line 3 formed by the bow door contour line segments conveniently.
In step S5, before cutting the hull outer plate of the fore-door total section 2 and after dismantling the steel bars, the method further includes measuring actual positions of all monitoring points by using a total station, comparing coordinates of actual positions of the same monitoring points with coordinates of initial positions, and if a difference value between the coordinates of the actual positions of any monitoring point and the coordinates of the initial positions exceeds a preset range, correcting the fore-door contour line 3 at the monitoring points to smooth the fore-door contour line 3, otherwise, cutting the hull outer plate of the fore-door total section 2.
The coordinates of the actual position and the coordinates of the initial position are three-dimensional space coordinates, and each coordinate comprises three coordinate values of x, y and z. In this embodiment, the coordinates of the initial position of a monitoring point are set to be (x, y, z), the coordinates of the actual position of the monitoring point are set to be (x ', y', z '), x-x' =a, y-y '=b, z-z' =c, and if a > D, B > D or C > D, it is determined that the difference between the coordinates of the actual position and the coordinates of the initial position is out of the preset range. Wherein, D >0, the specific value of D can be adaptively adjusted according to the accuracy requirement of the fore door contour line 3. In other embodiments, it may be determined according to other criteria that "the difference between the coordinates of the actual position of any monitoring point and the coordinates of the initial position is out of the preset range", which is not limited herein.
S6, driving the two hinges to enable the two bow doors 4 to open and close for a plurality of times.
In step S6, the temporary hydraulic cabin opening pump station 9 is used for driving the two hinges to act so as to realize the repeated opening and closing of the two bow doors 4, and the hinge is driven by using the same temporary hydraulic cabin opening pump station 9 adopted in step S4 as a power source, so that the situation that the other power sources are connected again is avoided, and the building efficiency of the ship body is improved.
After the step S6, the method further comprises the step of removing the temporary hydraulic cabin opening pump station 9, so that the hydraulic pipeline between the temporary hydraulic cabin opening pump station 9 and the hydraulic system is prevented from affecting the lifting and moving of the subsequent bow door total section 2.
Before step S6, the ship body frame is further connected with a crane at the lifting unit, when the bow door 4 is opened and closed, if the bow door section 2 has a tilting trend, the crane applies a pulling force to the bow door section 2, so that the possibility of tilting of the bow door section 2 can be reduced, and the safety of ship body construction and the qualification rate of the bow door section 2 are ensured.
And S7, a shape-preserving component is arranged on the bow door total section 2 and comprises a plurality of shape-preserving flat irons 5 arranged along the bow door contour line 3, one end of the shape-preserving flat irons 5 is connected with the outer side wall of the bow door 4 at the closed position, and the other end of the shape-preserving flat irons is connected with the outer side wall of the hull outer plate positioned outside the bow door contour line 3.
Specifically, the profile-preserving component is arranged to realize the relative fixation between the bow door 4 and the hull outer plate of the bow door block 2, reduce the possibility that the bow door 4 moves in the hoisting process and collides with other structures, ensure the safety of hull construction and also ensure the qualification rate of the bow door 4.
In the embodiment, the conformal flat iron 5 is welded with the bow door 4 and the hull plate.
Preferably, the shape-preserving component further comprises a first inner shape-preserving component, wherein the first inner shape-preserving component is positioned on the inner side of the bow door main section 2 and connected between the inner side wall of the bow door 4 and the locking arm on the hinge, so that the relative fixation between the bow door 4 and the hinge is realized, the bow door 4 is prevented from being separated from the hinge, the reliability of connection between the bow door 4 and the hinge is ensured, and the bow door 4 is ensured to be smoothly opened.
Further, the profile-preserving component further comprises a second inner profile-preserving piece, a third inner profile-preserving piece and a fourth inner profile-preserving piece which are vertically arranged, wherein the second inner profile-preserving piece, the third inner profile-preserving piece and the fourth inner profile-preserving piece are all positioned on the inner side of the bow door total section 2, and the second inner profile-preserving piece is connected between the inner side wall of the bow door 4 and the strong structure of the lower surface of the deck. The third internal profile-preserving piece is horizontally arranged, and two ends of the third internal profile-preserving piece are respectively connected to the inner side walls of the two bow doors 4. The fourth internal profile-protecting piece is vertically arranged and is connected between the bottom of the bow door 4 and the bottom edge of the bow door frame. The second internal shape-retaining piece, the third internal shape-retaining piece and the fourth internal shape-retaining piece are connected with the bow door 4 on the inner side of the bow door total section 2, the connection position between the bow door total section 2 and the bow door 4 is increased, the possibility that the bow door 4 moves in the hoisting process and collides with other structures is further reduced, and the safety of hull construction and the qualification rate of the bow door 4 are guaranteed.
S8, the hoisting bow door total section 2 enters a dock to be folded, and a ship body is formed.
Specifically, the lifting and moving of the fore door header 2 is achieved by the crane being connected to the lifting lugs 81 of the lifting unit.
S9, removing the conformal assembly.
Specifically, the separation between the bow door 4 and the shape-preserving component and the separation between the bow door block 2 and the shape-preserving component are realized by using tools such as flame cutters.
Preferably, the first, second, third and fourth inner profile is removed first, then the profile flat iron 5 is removed, and the hull outer plate is trimmed when the profile flat iron 5 is removed. When dismantling any structure in the conformal subassembly, all utilize flame cutting machine, the structure of hull planking all has the possibility of certain deformation, above-mentioned setting, after dismantling the inside conformal piece of bow door total section 2 (first interior conformal piece, second interior conformal piece, third interior conformal piece and fourth interior conformal piece), the hull planking produces certain deformation, the in-process of dismantling the outside conformal band iron 5 of bow door total section 2 is being dismantled again, can repair the hull planking according to the deformation that the hull planking produced simultaneously, guarantee the aesthetic measure of the hull planking on the bow door total section 2, do benefit to the qualification rate that improves the bow door total section.
In this embodiment, the first inner shaping member, the second inner shaping member, the third inner shaping member and the fourth inner shaping member may be round bars, channel steel or other structures, and the first inner shaping member, the second inner shaping member, the third inner shaping member and the fourth inner shaping member are welded to the bow door 4 and the bow door header 2.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A hull construction process comprising:
s1, providing a plurality of bow door hull sections (1), and marking bow door contour line segments on the bow door hull sections (1);
s2, a plurality of bow door hull sections (1) are welded in a total group to obtain a bow door total section (2), and bow door contour line sections are connected end to end on the bow door total section (2) to form a bow door contour line (3);
S3, supporting the bow door total section (2) on a supporting component;
s4, installing two hinges on the bow door total section (2), and connecting the input ends of the two hinges with the output end of a hydraulic system on the bow door total section (2), wherein the output ends of the two hinges are connected with the inner side wall of a ship body outer plate of an inner area surrounded by the bow door contour line (3);
s5, cutting hull planking of the bow door total section (2) along the bow door contour line (3) to form two bow doors (4), wherein the output ends of the two hinges are respectively and correspondingly connected to the inner side walls of the two bow doors (4);
s6, driving the two hinges to enable the two bow doors (4) to open and close for a plurality of times;
s7, a shape-preserving component is arranged on the bow door total section (2), the shape-preserving component comprises a plurality of shape-preserving flat irons (5) arranged along the bow door contour line (3), one end of the shape-preserving flat irons (5) is connected with the outer side wall of the bow door (4) in a closed position, and the other end of the shape-preserving flat irons is connected with the outer side wall of a hull outer plate positioned outside the bow door contour line (3);
s8, hoisting the bow door block (2) into a dock for folding to form a ship body;
s9, removing the conformal assembly;
In step S3, the support assembly includes a high-level support (61) and a low-level support (62), the bottom of the bow door block (2) is connected to the top of the low-level support (62), the high-level support (61) is provided with a plurality of high-level supports (61) along the circumferential interval of the hull outer plate of the bow door block (2), the front end of the bow door block (2) is provided with one high-level support (61), two sides of the bow door block (2) along the width direction are respectively provided with a group of high-level support groups, each high-level support group includes a plurality of high-level supports (61) arranged along the hull outer plate at intervals, the bottom of each high-level support (61) and the bottom of each low-level support (62) are both connected to the working floor (10), and the top end of each high-level support (61) is connected to the upper end of the hull outer plate.
Setting the high-level support (61) with the largest vertical distance from the center line of the ship body as a reference support, wherein the plane along the ship length direction, where the center of gravity of the bow door block (2) is located, is a first plane, the plane along the ship width direction, where the center of gravity is located, is a second plane, a reference point is taken in the second plane, the reference point is located on the working ground (10), the vertical distance between the reference point and the center line of the ship body is the same as the vertical distance between the center point of the bottom of the reference support and the center line of the ship body, and the bow door block (2) is supported on a support assembly:
When the two bow doors (4) are not opened, in the first plane, the included angle between the vertical line where the gravity center is located and the connecting line between the gravity center and the lowest point at the bottom of the bow door total section (2) is larger than 7 degrees, and in the second plane, the included angle between the vertical line and the connecting line between the gravity center and the datum point is larger than 7 degrees;
when both the bow doors (4) are opened, in the first plane, the included angle between the vertical line and the gravity center and the connecting line between the vertical line and the lowest point at the bottom of the bow door total section (2) is larger than 7 degrees;
when only one of the bow doors (4) is opened, in the second plane, the included angle of the connecting line between the vertical line and the gravity center and the datum point is larger than 7 degrees.
2. Hull construction process according to claim 1, characterized in that in step S4, before the input of the hinge is connected to the output of the hydraulic system on the bow door header (2), it further comprises: the input end of the hydraulic system is connected with a temporary hydraulic cabin opening pump station (9) to debug the hydraulic system;
in step S6, the temporary hydraulic cabin opening pump station (9) is used for driving the two hinges to act so as to realize the multi-time opening and closing of the two bow doors (4).
3. The hull construction process according to claim 1, further comprising, after step S3, providing lifting units on the deck of the bow door header (2), the lifting units comprising lifting lugs (81), the lifting units being provided in two, the two lifting units being provided on opposite sides of the center of gravity of the bow door header (2) in the direction of the ship' S length, respectively.
4. A hull construction process according to claim 3, wherein the lifting unit comprises two lifting assemblies (8) arranged at intervals in the width direction of the vessel, two lifting assemblies (8) in the same lifting unit being symmetrically arranged about the centre line of the hull, the lifting assemblies (8) comprising a number of lifting lugs (81).
5. The hull construction process according to claim 1, further comprising covering the hull outer plates with steel bars along the fore door contour line segment after step S1;
in step S5, before cutting the hull external plate of the fore door block (2), the method further comprises dismantling the steel bar.
6. The hull construction process according to claim 5, wherein in step S1, before being covered with steel bars, further comprising marking the gate contour line (3) with a plurality of monitoring lines (7), the plurality of monitoring lines (7) being arranged at intervals along the gate contour line (3), an intersection point between the monitoring lines (7) and the gate contour line (3) being a monitoring point, and measuring an initial position of the monitoring point using a total station;
In step S5, before cutting the hull plate of the fore-door total section (2) and after dismantling the steel bar, the method further includes measuring an actual position of the monitoring point by using a total station, comparing a coordinate of the actual position with a coordinate of an initial position of the same monitoring point, and if a difference value between the coordinate of the actual position of any one of the monitoring points and the coordinate of the initial position exceeds a preset range, correcting the fore-door contour line (3) at the monitoring point to smooth the fore-door contour line (3), otherwise, cutting the hull plate of the fore-door total section (2).
7. The hull construction process according to claim 1, wherein in step S5, the hull outer plates of the fore door header (2) are cut symmetrically at left and right sides of a hull center line in synchronization;
and/or in the step S5, when the hull outer plate of the bow door total section (2) is cut, cutting the corner (311) of the bow door contour line (3), the straight line section (312) between two adjacent corners (311) and the center seam (32) of the bow door contour line (3) sequentially from front to back.
8. The hull construction process according to claim 1, wherein the profile assembly further comprises a first inner profile located inside the fore door header (2) and connected between the inner side wall of the fore door (4) and the locking arm on the hinge; and/or the number of the groups of groups,
The profile-preserving assembly further comprises a second inner profile-preserving piece which is vertically arranged, is positioned on the inner side of the bow door total section (2) and is connected between the inner side wall of the bow door (4) and the strong structure on the lower surface of the deck; and/or the number of the groups of groups,
the profile-preserving assembly further comprises a third inner profile-preserving piece which is horizontally arranged, the third inner profile-preserving piece is positioned on the inner side of the bow door total section (2), and two ends of the third inner profile-preserving piece are respectively connected to the inner side walls of the two bow doors (4); and/or the number of the groups of groups,
the profile-preserving component further comprises a fourth inner profile-preserving piece which is vertically arranged, and the fourth inner profile-preserving piece is located on the inner side of the bow door total section (2) and connected between the bottom of the bow door (4) and the bottom edge of the bow door frame.
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| CN202210906842.8A CN115230903B (en) | 2022-07-29 | 2022-07-29 | Ship body construction process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60154980A (en) * | 1984-01-25 | 1985-08-14 | Mitsui Eng & Shipbuild Co Ltd | Construction of ship |
| CN111792002A (en) * | 2020-07-24 | 2020-10-20 | 上海外高桥造船有限公司 | Assembling method for bow main section of bulk carrier |
| CN112238316A (en) * | 2020-09-29 | 2021-01-19 | 广船国际有限公司 | Welding jig frame for steel shell block of immersed tunnel and using method of welding jig frame |
| CN113371152A (en) * | 2021-07-30 | 2021-09-10 | 广船国际有限公司 | Segmented construction method for bow door of ro-ro passenger ship |
| CN114715352A (en) * | 2022-05-19 | 2022-07-08 | 芜湖造船厂有限公司 | Method for manufacturing bow door of ship |
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2022
- 2022-07-29 CN CN202210906842.8A patent/CN115230903B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60154980A (en) * | 1984-01-25 | 1985-08-14 | Mitsui Eng & Shipbuild Co Ltd | Construction of ship |
| CN111792002A (en) * | 2020-07-24 | 2020-10-20 | 上海外高桥造船有限公司 | Assembling method for bow main section of bulk carrier |
| CN112238316A (en) * | 2020-09-29 | 2021-01-19 | 广船国际有限公司 | Welding jig frame for steel shell block of immersed tunnel and using method of welding jig frame |
| CN113371152A (en) * | 2021-07-30 | 2021-09-10 | 广船国际有限公司 | Segmented construction method for bow door of ro-ro passenger ship |
| CN114715352A (en) * | 2022-05-19 | 2022-07-08 | 芜湖造船厂有限公司 | Method for manufacturing bow door of ship |
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| CN115230903A (en) | 2022-10-25 |
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