CN111619758A - Method for mounting keel backing plate of bilge of ship body - Google Patents
Method for mounting keel backing plate of bilge of ship body Download PDFInfo
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- CN111619758A CN111619758A CN202010473357.7A CN202010473357A CN111619758A CN 111619758 A CN111619758 A CN 111619758A CN 202010473357 A CN202010473357 A CN 202010473357A CN 111619758 A CN111619758 A CN 111619758A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
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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
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
- B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the technical field of ship manufacturing, and discloses a method for installing bilge keel base plates of a ship body. The installation method of the bilge keel liner plate of the ship body comprises the following steps: fixing self-provided base plates on the sectional outer plates at intervals along the length direction of the ship body and assembling the sectional outer plates into ship outer plates; fixing glass fiber cloth between the two ends of the self-provided base plate and the outer plate of the ship along the length direction of the ship body; fixing an embedded base plate between the two self-carrying base plates and forming a butt joint with the two self-carrying base plates, wherein the glass fiber cloth is positioned between the butt joint and the outboard plate; welding the butt seam to connect the self-contained backing plate and the embedded backing plate. According to the method for installing the bilge keel base plate of the ship body, the base plate is high in connection reliability, and the outer plate of the ship is not easy to damage.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to a method for installing bilge keel base plates of a ship body.
Background
The bilge keels of the ship are structures arranged on the bilge outer plates at the bottom of the middle area of the ship and are mainly used for increasing damping during rolling of the ship, so that wave resistance and stability of the ship are increased, and rolling of the ship is greatly reduced. The bilge keels typically include a backing plate directly connected to the outer hull and a keel connected to the backing plate. The outer plate of a large ship needs to be formed by assembling and welding a plurality of plates, so that along the length direction of the ship, the backing plates of bilge keels are also commonly welded on the outer plate of the ship by adopting a plurality of backing plates respectively, and the abutting seams of the two adjacent backing plates are welded and connected.
In the prior art, two adjacent bilge keel backing plates are often welded in the following two modes: firstly, two backing plates are welded on an outer plate of the ship, and then CO is adopted2The gas shielded welding directly welds the butted seam of the two backing plates, a molten pool is easily formed on the outer ship plate in the welding process by the mode, namely certain damage is caused to the outer ship plate, the outer ship plate is torn through the backing plates after the keel is stressed in the subsequent use process, the outer ship plate is easily torn at the molten pool, the service life of the outer ship plate is reduced, in addition, the paint on the outer ship plate around the seam is damaged by a temperature field in the welding process, and the subsequent paint repairing process is increased; the second is, add the copper backing plate between backing plate and the extra-ship board to protect the extra-ship board, but in the welding process have partial copper element to melt the welding seam, copper element can influence the tissue of welding seam, increases the fracture tendency of welding seam, simultaneously because the heat conductivility of copper backing plate is better, the welding seam cooling rate is fast, and welding residual stress increases, and the root can form the crackle and spread gradually to the welding seam surface under the effect of stress, influences the welding seam quality.
Therefore, the invention is needed to provide a method for installing bilge keels of a ship to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for installing a bilge keel base plate of a ship body, which has high connection reliability and is not easy to damage an outer plate of the ship.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for installing a keel liner plate of a bilge of a ship body comprises the following steps:
fixing self-provided base plates on the sectional outer plates at intervals along the length direction of the ship body and assembling the sectional outer plates into ship outer plates;
fixing glass fiber cloth between the two ends of the self-provided base plate and the outer plate of the ship along the length direction of the ship body;
fixing an embedded base plate between the two self-contained base plates and respectively forming a butt joint with the two self-contained base plates, wherein the glass fiber cloth is positioned between the butt joint and the outboard plate;
welding the butt seam to connect the self-contained backing plate and the embedded backing plate.
Optionally, when the self-contained base plate is fixed on the outer board, a gap for accommodating the glass fiber cloth is reserved between the two ends of the self-contained base plate along the length direction of the hull and the outer board.
Optionally, before the butt joint seam is welded, an arc striking plate and an arc quenching plate are welded at two ends of the butt joint seam, arc striking and quenching seams are arranged on the arc striking plate and the arc quenching plate, the arc striking and quenching seams are respectively located at two ends of the butt joint seam, and the cross-sectional size of the arc striking and quenching seams is the same as that of the butt joint seam.
Optionally, the length of the quenching arc seam is H, wherein H is more than or equal to 25mm and less than or equal to 35 mm.
Optionally, the size of the glass fiber cloth along the length direction of the butt seam is not smaller than the sum of the lengths of the butt seam and the arc striking and extinguishing seams at the two ends of the butt seam.
Optionally, the self-carrying backing plate, the embedded backing plate, the arc striking plate and the arc extinguishing plate are made of the same material and have the same thickness.
Optionally, after the butt joint seam is welded, the arc striking plate and the arc extinguishing plate are detached.
Optionally, welding grooves are symmetrically arranged at the butt joint position of the embedded base plate and the self-contained base plate to form a butt joint seam;
the inclination angle of the welding groove is alpha, wherein alpha is more than or equal to 40 degrees and less than or equal to 45 degrees;
the groove gap between the welding groove with the backing plate and the adjacent welding groove of the embedded backing plate is D, wherein D is more than or equal to 4mm and less than or equal to 7 mm.
Optionally, after the butt seam welding is completed, the glass fiber cloth is taken out.
Optionally, before welding the butt seam, fixing the embedded backing plate on the outer ship plate by spot welding;
and after the butt joint is welded, welding the embedded base plate on the outer plate of the ship in an angle welding mode.
The invention has the beneficial effects that:
according to the installation method of the keel backing plate of the bilge of the ship body, the self-carrying backing plates are firstly fixed on the segmented outer plates before the segmented outer plates are assembled into the outer plates of the ship body, so that the installation operation of the self-carrying backing plates is more convenient, the embedded backing plates are fixed between the two adjacent self-carrying backing plates, the continuity of the backing plates along the length direction of the ship body can be ensured, and the glass fiber cloth is fixed between the outer plates of the ship body and the embedded backing plates and between the outer plates of the ship body and the self-carrying backing plates at the positions of butt joints, namely, in the welding process, the glass fiber cloth backing plates support a metal molten pool of a welding seam and prevent the molten pool from leaking downwards, so that the back of the welding seam is forced to be formed, the glass fiber cloth can isolate the welding seam from the outer plates of the ship; the glass fiber cloth has good heat insulation performance, so that the damage of the welding process to paint around a welding seam on the outer board of the ship can be greatly reduced, the working time of subsequent paint repair is reduced, and the ship building efficiency is improved; the glass fiber cloth can not generate elements such as copper elements and the like which increase the cracking tendency of the welding seam and be fused into the welding seam, so that the welding seam is uniformly cooled, the residual stress of the welding seam is reduced, the welding seam is not easy to crack, and the reliability of the welding seam is improved; in addition, glass fiber cloth texture ground is soft, and it can change along with the change of ship outer panel radian in a flexible way, consequently can laminate more with the ship outer panel, further guarantees good thermal-insulated effect, and the suitability is high and with low costs.
Drawings
FIG. 1 is a process flow chart of a mounting method of bilge keels of a ship body according to an embodiment of the invention;
fig. 2 is a schematic structural view of the hull bilge keel liner plate after the liner plate is embedded and fixed in the installation method of the hull bilge keel liner plate according to the embodiment of the invention;
fig. 3 is a schematic structural view of another view angle after a backing plate is fixed in the installation method of the bilge keel backing plate of the ship body according to the embodiment of the invention;
fig. 4 is a schematic structural view of the hull bilge keel plate installation method after the arc striking plate and the arc extinguishing plate are fixed according to the embodiment of the invention;
FIG. 5 is an enlarged view taken at A in FIG. 3;
fig. 6 is a process flow chart of another installation method of bilge keels of the ship hull according to the embodiment of the invention.
In the figure:
1-an outer plate of the ship; 11-a segmented outer plate;
2-carrying a backing plate;
3-embedding a backing plate;
4-butt seam; 41-welding a groove;
5-glass fiber cloth;
61-arc striking plate; 62-arc quenching plate; 63-quenching the arc seam.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
In the prior art, the bilge keel base plate of the ship mainly adopts CO2Direct welding by gas shielded welding and welding after copper plate is arranged between the backing plate and the outer plate of the ship, CO2The gas shielded welding directly welds and easily forms a molten pool on the outer ship plate, thereby influencing the service life of the outer ship plate in the subsequent use process and increasing the paint repairing working hours of the subsequent outer ship plate; in the mode of adding the copper gasket between the backing plate and the outer plate of the ship and then welding, part of copper elements can be melted into a welding seam, so that the root of the welding seam forms cracks to influence the welding quality.
In order to solve the above problems, the embodiment provides a method for installing a bilge keel liner plate of a ship body, which can be used in the technical field of ship manufacturing, and is particularly suitable for installing a bilge keel structure of a large ship. As shown in fig. 1-4, the installation method of the bilge keel liner plate of the ship body comprises the following steps:
fixing self-provided backing plates 2 on the sectional outer plates 11 at intervals along the length direction of the ship body, and assembling the sectional outer plates 11 into the outer plates 1;
along the length direction of the ship body, glass fiber cloth 5 is fixed between two ends of the self-provided backing plate 2 and the outer ship plate 1;
fixing the embedded base plate 3 between the two self-contained base plates 2 and forming a butt joint 4 with the two self-contained base plates 2 respectively, wherein the glass fiber cloth 5 is positioned between the butt joint 4 and the outboard plate 1;
the butt seam 4 is welded to connect the self-carrying mat 2 and the insert mat 3.
According to the installation method of the keel backing plate of the bilge of the ship body, the self-carrying backing plate 2 is firstly fixed on the sectional outer plate 11 before the sectional outer plate 11 is assembled into the ship outer plate 1, so that the installation operation of the self-carrying backing plate 2 is more convenient, the continuity of the backing plate along the length direction of the ship body can be ensured by fixing the embedded backing plate 3 between the two adjacent self-carrying backing plates 2, and the glass fiber cloth 5 is fixed between the ship outer plate 1 and the embedded backing plate 3 and the self-carrying backing plates 2 at the position of the seam 4, namely, in the welding process, the glass fiber cloth backing plate supports a metal molten pool of the welding seam and prevents the molten pool from leaking downwards, so that the back of the welding seam is forced to be formed, the glass fiber cloth can isolate the welding seam from the ship outer plate, the glass fiber cloth has good heat resistance and can drag the welding seam, and; the glass fiber cloth 5 has good heat insulation performance, so that the damage of the welding process to paint around the welding seam on the outer ship plate 1 can be greatly reduced, the working hours of subsequent paint repair are reduced, and the ship building efficiency is improved; the glass fiber cloth 5 does not generate elements such as copper elements and the like which increase the cracking tendency of the welding seam and are blended into the welding seam, so that the welding seam is uniformly cooled, the residual stress of the welding seam is reduced, the welding seam is not easy to crack, and the reliability of the welding seam is improved; in addition, the glass fiber cloth 5 is soft and can flexibly change along with the change of the radian of the outer ship plate 1, so that the glass fiber cloth can be more attached to the outer ship plate 1, a good heat insulation effect is further ensured, and the glass fiber cloth is high in applicability and low in cost.
Specifically, in the present embodiment, the self-attaching stay 2 is fixed to the segment outer panel 11 by fillet welding. Alternatively, as shown in fig. 2, the sectional outer plates 11 welded with the self-bearing backing plates 2 are assembled into the outer ship plate 1 by welding after positioning and assembling. From the concrete length of taking backing plate 2 and embedding backing plate 3 to can guarantee 11 concatenations of segmentation planking after, also can totally dock the concatenation from taking backing plate 2 and embedding backing plate 3 can. Optionally, in this embodiment, the size of the self-carrying backing plate 2 and the embedded backing plate 3 along the length direction of the hull is not less than 300mm, so that the number of butt joints 4 can be reduced as much as possible, and the welding workload can be reduced.
In order to conveniently fix the glass cloth 5 between both ends of the self-contained mat 2 and the outer board 1, as shown in fig. 3, when the self-contained mat 2 is fixed to the outer board 1, a gap for accommodating the glass cloth 5 is left between both ends of the self-contained mat 2 in the longitudinal direction of the hull and the outer board 1. In this embodiment, the self-contained backing plate 2 is fixed to the segmented outer plate 11 by welding, and unwelded sections are left at both ends of the self-contained backing plate 2 along the length direction of the ship body, so that the glass fiber cloth 5 can be inserted between the self-contained backing plate 2 and the outer plate 1 from the unwelded sections. The fixing process of the glass fiber cloth 5 is as follows: one side of the glass fiber cloth 5 is inserted into a gap of a non-welded section between the self-contained backing plate 2 and the outer ship plate 1, the embedded backing plate 3 is butted with the self-contained backing plate 2 to form a butt joint seam 4, the glass fiber cloth 5 is pressed when the embedded backing plate 3 is butted with the self-contained backing plate 2, the glass fiber cloth 5 is positioned between the butt joint seam 4 and the outer ship plate 1, and at the moment, the embedded backing plate 3 is fixed on the outer ship plate 1. The fixing of the embedded backing plate 3 not only realizes the butt joint with the self-provided backing plate 2, but also plays a role in fixing the glass fiber cloth 5. In this embodiment, the glass fiber cloth 5 may be stacked in two layers, and the total thickness is about 0.5mm, and in other embodiments, the thickness of the glass fiber cloth 5 may be selected according to actual needs.
In order to improve the welding quality of the butt seam 4, as shown in fig. 4, before the butt seam 4 is welded, an arc striking plate 61 and an arc extinguishing plate 62 are welded at two ends of the butt seam 4, the arc striking plate 61 and the arc extinguishing plate 62 are both provided with arc striking and extinguishing seams 63, and the arc striking and extinguishing seams 63 are respectively positioned at two ends of the butt seam 4 and have the same cross-sectional size as the butt seam 4. When the butt joint seam 4 is welded, the arc leading and extinguishing seam 63 below the butt joint seam 4 is used as a welding starting point, the whole butt joint seam 4 is continuously welded from bottom to top, and finally the welding is stopped at the arc leading and extinguishing seam 63 above the butt joint seam 4, so that the welding starting point and the welding finishing point fall at the arc leading and extinguishing seam 63, the phenomena of cracks and stress concentration at the butt joint seam 4 are ensured to be difficult to occur, and the welding quality of the butt joint seam 4 is improved. Specifically, in the present embodiment, the arc striking plate 61 and the arc extinguishing plate 62 are fixed to the self-contained backing plate 2 and the embedded backing plate 3 by spot welding. The size of the arc striking plate 61 and the arc extinguishing plate 62 is 50-60 mm, and within the size range, the arc striking plate 61 and the arc extinguishing plate 62 not only need less fixed welding workload, but also can ensure that the arc striking plate 61 and the arc extinguishing plate 62 have enough connection rigidity. In the welding process, the width of welding swing is reduced as much as possible, and the embedded base plate 3 and the self-contained base plate 2 on two sides can be fused. In this embodiment, the welding current is 150-190A, the voltage is 22-25V, and the welding speed is 20-30 cm/min.
Preferably, as shown in FIG. 4, the length of the quenching arc slot 63 is H, where H is 25mm ≦ 35 mm. In the welding process, the length H is welded on the striking-extinguishing arc seam 63, and then the welding of the butt joint seam 4 is carried out, so that the welding stability of the butt joint seam 4 section can be ensured, and the welding quality of the butt joint seam 4 is better. Further, the material of the self-contained backing plate 2, the embedded backing plate 3, the arc striking plate 61 and the arc extinguishing plate 62 is the same, and the thickness is the same.
Preferably, as shown in fig. 4, the size of the glass cloth 5 along the length direction of the butt seam 4 is not smaller than the sum of the lengths of the butt seam 4 and the striking and extinguishing arc seams 63 at both ends thereof. All welding sections are guaranteed to be isolated from the outer ship plate 1 through the glass fiber cloth 5, and the influence of the welding process on paint on the outer ship plate 1 and the quality of the outer ship plate is further reduced.
Specifically, as shown in fig. 5, welding grooves 41 are symmetrically arranged at the butt joint position of the embedded backing plate 3 and the self-carrying backing plate 2 to form a butt joint seam 4, the inclination angle of the welding groove 41 is alpha, wherein alpha is more than or equal to 40 degrees and less than or equal to 45 degrees; the groove gap between the welding groove 41 with the backing plate 2 and the adjacent welding groove 41 embedded into the backing plate 3 is D, wherein D is more than or equal to 4mm and less than or equal to 7 mm. Through setting up the parameter setting of welding groove 41 in above-mentioned within range, can guarantee the heat input of welding seam fusion and control welding process, avoid welded groove clearance undersize to appear the welding seam incomplete weld and groove clearance too big lead to heat input too big and then make the planking warp and destroy paint scheduling problem. In this embodiment, the quenching arc joint 63 is also composed of symmetrically arranged grooves, and the angle of the grooves and the gap between the grooves are the same as the welding groove 41 and the groove gap of the butt joint 4.
Preferably, the arc striking plate 61 and the arc quenching plate 62 are removed after the welding of the butt seam 4 is completed. In this embodiment, the arc striking plate 61 and the arc quenching plate 62 are removed from the welding seam between the backing plate 2 and the embedded backing plate 3 by grinding and carbon planing, so as to detach the arc striking plate 61 and the arc quenching plate 62.
Alternatively, after the arc striking plate 61 and the arc extinguishing plate 62 are removed, the glass cloth 5 is pulled out from between the weld and the outer ship plate 1, and finally the embedded base plate 3 is completely welded to the outer ship plate 1 by fillet welding. Before welding the butt joint 4, the embedded base plate 3 is fixed on the outer ship plate 1 in a spot welding mode, the spot welding plays a role in temporary positioning, and after the butt joint 4 is welded and the glass fiber cloth 5 is drawn out, the embedded base plate 3 is fixed on the outer ship plate 1 in an angle welding mode to completely fix the embedded base plate 3.
In summary, as shown in fig. 6, the installation method of the bilge keel liner plate of the hull comprises the following steps:
s1: welding the self-provided base plate 2 on the segmented outer plate 11 along the length direction of the ship body, wherein two ends of the self-provided base plate 2 are provided with unwelded segments;
s2: positioning and assembling the sectional outer plate 11, and welding the sectional outer plate into the outboard plate 1;
s3: clamping glass fiber cloth 5 between the unwelded section with the backing plate 2 and the outer plate 1 of the ship;
s4: fixing an embedded base plate 3 on the outer ship plate 1 and between two self-contained base plates 2, wherein the embedded base plate 3 and the self-contained base plates 2 respectively form butt joints 4 and simultaneously compress and fix glass fiber cloth 5;
s5: welding an arc striking plate 61 and an arc extinguishing plate 62 at two ends of the butt joint seam 4, and connecting an arc striking and extinguishing seam 63 on the arc striking plate 61 and the arc extinguishing plate 62 with the butt joint seam 4;
s6: continuously welding the butt joint 4 to the arc striking and extinguishing seam 63 above the butt joint 4 from the arc striking and extinguishing seam 63 below the butt joint 4 as a welding starting point;
s7: disassembling the arc striking plate 61 and the arc extinguishing plate 62;
s8: taking out the glass fiber cloth 5 between the welding seam and the outboard plate 1;
s9: the embedded backing plate 3 is welded to the outer hull plate 1 by fillet welding.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not to be construed as limitations of the embodiments of the present invention, but may be modified in various embodiments and applications by those skilled in the art according to the spirit of the present invention, and the content of the present description should not be construed as a limitation of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method for installing a keel liner plate of a bilge of a ship body is characterized by comprising the following steps:
fixing self-provided backing plates (2) on the sectional outer plates (11) at intervals along the length direction of the ship body, and assembling the sectional outer plates (11) into the ship outer plate (1);
fixing glass fiber cloth (5) between the two ends of the self-provided base plate (2) and the outer ship plate (1) along the length direction of the ship body;
fixing an embedded base plate (3) between the two self-carrying base plates (2) and respectively forming a butt joint seam (4) with the two self-carrying base plates (2), wherein the glass fiber cloth (5) is positioned between the butt joint seam (4) and the outer ship plate (1);
welding the butt seam (4) to connect the self-contained mat (2) and the embedded mat (3).
2. The method for installing the bilge keels of the ship body according to claim 1, wherein a gap for accommodating the glass fiber cloth (5) is left between both ends of the self-contained backing plate (2) in the length direction of the ship body and the outer ship plate (1) when the self-contained backing plate (2) is fixed on the outer ship plate (1).
3. The method for installing the keel plates of the bilges of the ship bodies according to claim 1 or 2, wherein before the butt joint seam (4) is welded, an arc starting plate (61) and an arc quenching plate (62) are welded at two ends of the butt joint seam (4), the arc starting plate (61) and the arc quenching plate (62) are both provided with arc starting and quenching seams (63), and the arc starting and quenching seams (63) are respectively positioned at two ends of the butt joint seam (4) and have the same cross-sectional dimension as that of the butt joint seam (4).
4. The method for installing the bilge keels of the ship body according to claim 3, wherein the length of the arc-extinguishing seam (63) is H, and H is more than or equal to 25mm and less than or equal to 35 mm.
5. The method for installing the keels of the bilges of the ship body according to claim 3, wherein the size of the glass fiber cloth (5) along the length direction of the butt seam (4) is not less than the sum of the lengths of the butt seam (4) and the arc striking and extinguishing seams (63) at the two ends of the butt seam.
6. The method for installing the keel pads of the bilges of a ship body according to claim 3, wherein the self-carrying pad (2), the embedded pad (3), the arc ignition plate (61) and the arc extinguishing plate (62) are made of the same material and have the same thickness.
7. The method for installing the keels of the bilges of the ship body as claimed in claim 3, wherein said arc starting plates (61) and said arc extinguishing plates (62) are removed after the welding of said butt seams (4) is completed.
8. The installation method of the keel liner plates of the bilges of the ship bodies according to the claim 1 or 2, wherein the butt joint positions of the embedded liner plate (3) and the self-contained liner plate (2) are symmetrically provided with welding bevels (41) to form butt joints (4);
the inclination angle of the welding groove (41) is alpha, wherein alpha is more than or equal to 40 degrees and less than or equal to 45 degrees;
the groove gap between the welding groove (41) with the backing plate (2) and the adjacent welding groove (41) of the embedded backing plate (3) is D, wherein D is larger than or equal to 4mm and smaller than or equal to 7 mm.
9. The installation method of the keel liner of the bilge of the ship body according to the claim 1 or 2, wherein the fiberglass cloth (5) is taken out after the butt joint seam (4) is welded.
10. The installation method of the keel plates of the bilges of the ship body according to claim 1 or 2, wherein the embedded plate (3) is fixed on the outer ship plate (1) by spot welding before the butt joint seam (4) is welded;
and after the butt joint seam (4) is welded, the embedded base plate (3) is welded on the outer ship plate (1) in an angle welding mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010473357.7A CN111619758A (en) | 2020-05-29 | 2020-05-29 | Method for mounting keel backing plate of bilge of ship body |
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| CN202010473357.7A CN111619758A (en) | 2020-05-29 | 2020-05-29 | Method for mounting keel backing plate of bilge of ship body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147997A (en) * | 2021-04-23 | 2021-07-23 | 中船黄埔文冲船舶有限公司 | Bilge keel structure and construction method thereof |
| CN113734350A (en) * | 2021-09-17 | 2021-12-03 | 上海外高桥造船有限公司 | Side outer plate of upper side cabin, upper side cabin section and half-width control method of upper side cabin |
| CN114954831A (en) * | 2022-05-30 | 2022-08-30 | 江南造船(集团)有限责任公司 | Assembling and welding method for bilge keels in ship closure stage |
| CN114987678A (en) * | 2022-07-08 | 2022-09-02 | 上海外高桥造船有限公司 | Mutually-embedded welding assembly and ship comprising same |
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| CN113734350A (en) * | 2021-09-17 | 2021-12-03 | 上海外高桥造船有限公司 | Side outer plate of upper side cabin, upper side cabin section and half-width control method of upper side cabin |
| CN114954831A (en) * | 2022-05-30 | 2022-08-30 | 江南造船(集团)有限责任公司 | Assembling and welding method for bilge keels in ship closure stage |
| CN114987678A (en) * | 2022-07-08 | 2022-09-02 | 上海外高桥造船有限公司 | Mutually-embedded welding assembly and ship comprising same |
| CN114987678B (en) * | 2022-07-08 | 2023-12-15 | 上海外高桥造船有限公司 | Mutually embedded welding assembly and ship comprising same |
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