CN115255699A - Ship depth finder mounting and welding method - Google Patents
Ship depth finder mounting and welding method Download PDFInfo
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- CN115255699A CN115255699A CN202210980446.XA CN202210980446A CN115255699A CN 115255699 A CN115255699 A CN 115255699A CN 202210980446 A CN202210980446 A CN 202210980446A CN 115255699 A CN115255699 A CN 115255699A
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- welding
- ship
- annular groove
- depth finder
- outer plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
Abstract
The invention relates to the technical field of ship welding, in particular to a ship depth finder installing and welding method, which comprises the following steps: s1, arranging a mounting hole for mounting a depth finder on a bottom outer plate of a ship; s2, a first annular groove and a second annular groove are formed in the outer plate at the bottom of the ship at the edge of the mounting hole, the first annular groove is located at the upper end of the outer plate at the bottom of the ship, and the second annular groove is located at the lower end of the outer plate at the bottom of the ship; s3, mounting the depth finder at the mounting hole, and performing positioning welding on the depth finder; s4, full welding is carried out on the first annular groove between the depth finder and the outer plate at the bottom of the ship; and carrying out full welding on the second annular groove between the depth finder and the outer plate at the bottom of the ship. The invention can ensure the welding quality and reduce the construction difficulty.
Description
Technical Field
The invention relates to the technical field of ship welding, in particular to a ship depth finder installation welding method.
Background
The depth finder is an intelligent automatic water depth measuring instrument essential for modern ships, and is a tubular combination welded by common carbon steel. The depth finder penetrates through the outer plate at the bottom of the ship and is firmly welded with the outer plate at the bottom of the ship. The annular welding seam between the depth finder and the outer plate at the bottom of the ship meets the strength and watertight requirements of the region. The prior art has two types:
1. the welding groove is completely designed at the lower part of the outer plate at the bottom of the ship, the upper part of the welding groove is not provided with a groove, and the root gap between the depth finder and the outer plate at the bottom of the ship is not more than 1mm. The method has very high requirements on the opening precision, once the gap of the groove root is more than 1mm, the common fillet weld without the groove is easy to crack under the action of various stresses; the welding groove is completely arranged at the lower part of the outer plate at the bottom of the ship, a large amount of overhead welding position welding construction needs to be carried out on site, and in addition, the root gap of the welding groove is small, the depth of the welding groove is large, a welding gun cannot go deep into the root of the welding groove, and the welding quality of a welding seam at the root of the welding groove is not easy to guarantee; because the welding groove is completely arranged at the lower part of the outer plate at the bottom of the ship, the welding filling amount at the lower end of the depth finder is overlarge, and the overlarge welding stress and deformation are easily generated at the lower end of the depth finder.
2. The welding groove is completely arranged on the upper portion of the outer plate at the bottom of the ship, and in order to ensure that a welding gun can deeply weld the root of the groove and ensure the welding quality of a root welding seam, the root gap between the depth finder and the outer plate at the bottom of the ship is generally larger than 10mm. Although the welding construction difficulty is reduced because all the site construction nodes are welded at the flat welding positions, the welding filling amount is large, and the welding stress and deformation from bottom to top can be continuously accumulated, so that the stress and deformation of the upper structure of the depth finder caused by welding are large, and the upper structure of the depth finder is easy to generate overlarge welding deformation and even crack.
Therefore, a ship depth finder installation welding method is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a mounting and welding method of a ship depth finder, which can ensure the welding quality and reduce the construction difficulty.
In order to achieve the purpose, the invention adopts the following technical scheme:
the installation and welding method of the ship depth finder comprises the following steps:
s1, arranging a mounting hole for mounting a depth finder on a bottom outer plate of a ship;
s2, a first annular groove and a second annular groove are formed in the outer plate at the bottom of the ship at the edge of the mounting hole, the first annular groove is located at the upper end of the outer plate at the bottom of the ship, and the second annular groove is located at the lower end of the outer plate at the bottom of the ship;
s3, mounting the depth finder at the mounting hole, and performing positioning welding on the depth finder;
s4, full welding is carried out on the first annular groove between the depth finder and the outer plate at the bottom of the ship; and carrying out full welding on the second annular groove between the depth finder and the outer plate at the bottom of the ship.
Further, in the step S1, a cutting line is cut on the outer plate at the bottom of the ship, and the mounting hole is cut according to the cutting line.
Further, in the step S1, the diameter of the mounting hole is larger than the outer diameter of the depth finder.
Further, the angle of the first annular groove is 45 ° ± 5 °, and the angle of the second annular groove is 45 ° ± 5 °.
Further, the depth of the first annular groove and the depth of the second annular groove are both half the thickness of the bottom outer panel of the ship.
Further, in the step S2, both the first annular groove and the second annular groove are polished to be white.
Further, in the step S3, the positioning welding is symmetrical positioning welding, and the length of each positioning welding is not less than 50mm.
Further, in the step S4, the first annular groove is not lower than the upper end surface of the bottom outer plate of the ship after full welding.
Further, in the step S4, the welded second annular groove is polished.
Further, the method comprises the step S5 of carrying out 100-percent MT + UT flaw detection on the welding line of the installation area of the depth sounder after the depth sounder is placed for 24 hours.
The invention has the beneficial effects that:
the ship depth finder installing and welding method provided by the invention is characterized in that an outer plate at the bottom of a ship is provided with an installing hole for installing the depth finder, the installing hole is provided with a first annular groove and a second annular groove, then the depth finder is installed at the installing hole and is subjected to positioning welding, and the first annular groove and the second annular groove are subjected to full welding. Through the mode, the precision of opening the mounting hole is reduced, the welding filling of the second annular groove is reduced, the welding stress and the deformation are reduced, the risk of cracking is reduced by adopting the first annular groove and the second annular groove, the workload of overhead welding is reduced, and the construction difficulty is reduced while the welding quality can be ensured.
Drawings
FIG. 1 is a flow chart of a method for installing and welding a ship depth finder according to the present invention;
FIG. 2 is a schematic diagram of the welding of a bottom outer plate of a ship and a depth finder in the installation and welding method of the depth finder for the ship.
In the figure:
1. a bottom outer plate of the ship; 2. a depth finder; 3. a first annular groove; 4. a second annular groove.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. 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 but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
When a depth finder is welded on a bottom outer plate of a ship, the invention provides a method for installing and welding the depth finder of the ship, as shown in figures 1-2, in order to ensure the welding quality and reduce the construction difficulty. The installation and welding method of the ship depth finder comprises the following steps:
s1, arranging a mounting hole for mounting a depth finder 2 on an outer plate 1 at the bottom of a ship;
s2, a first annular groove 3 and a second annular groove 4 are formed in the outer plate 1 at the bottom of the ship at the edge of the mounting hole, the first annular groove 3 is located at the upper end of the outer plate 1 at the bottom of the ship, and the second annular groove 4 is located at the lower end of the outer plate 1 at the bottom of the ship;
s3, mounting the depth finder 2 at the mounting hole, and performing positioning welding on the depth finder 2;
s4, full welding is carried out on the first annular groove 3 between the depth finder 2 and the outer plate 1 at the bottom of the ship; and (3) carrying out full welding on a second annular groove 4 between the depth finder 2 and the outer plate 1 at the bottom of the ship.
In this way, the precision of opening the mounting hole has been reduced, has reduced the welding of second annular groove 4 moreover and has filled, has reduced welding stress and deformation, adopts first annular groove 3 and second annular groove 4 to reduce the risk of fracture moreover, has reduced the work load of overhead welding moreover, when can guaranteeing welding quality, reduces the construction degree of difficulty.
A reasonable installation welding process is adopted, so that serious asymmetric welding is avoided; the welding filling amount during installation and welding of the depth finder 2 is effectively reduced, and the welding construction efficiency is improved; the welding workload of the overhead welding position is reduced, and the construction difficulty is reduced; the depth of the unilateral groove is prevented from being too large, and the welding quality of the root weld joint is improved; when welding stress and deformation are reduced, the welding stress and the deformation are prevented from being concentrated at local parts, the risk that the depth finder 2 generates overlarge welding stress and deformation or even cracks in the installation and welding process is effectively reduced, and the installation and welding quality and efficiency of the depth finder 2 are ensured.
Further, in step S1, a cutting line is cut on the bottom outer plate 1 of the ship, and a mounting hole is cut according to the cutting line. The cutting line is arranged in a scribing mode, so that the cutting precision can be guaranteed when the mounting hole is formed.
Further, in step S1, the diameter of the mounting hole is larger than the outer diameter of the depth finder 2. Specifically, in this embodiment, the diameter of the mounting hole needs to be controlled within +6mm of the outer diameter of the depth finder 2, and if the diameter of the mounting hole is greater than +6mm of the outer diameter of the depth finder 2, the region of the mounting hole of the outer plate 1 at the bottom of the ship needs to be subjected to surfacing welding until the diameter of the opening meets the above requirement, and large-gap welding is strictly prohibited.
Further, the angle of the first annular groove 3 is 45 ° ± 5 °, and the angle of the second annular groove 4 is 45 ° ± 5 °. Specifically, a carbon arc gouging is adopted to machine the first annular groove 3 and the second annular groove 4. Through the arrangement, the welding difficulty can be reduced, and meanwhile, the welding filling amount is reduced.
Further, the depth of the first annular groove 3 and the depth of the second annular groove 4 are both half the thickness of the bottom outer panel 1 of the ship. The connection strength between the ship bottom outer plate 1 and the depth finder 2 can be ensured after welding is finished.
Further, in step S2, both the first annular groove 3 and the second annular groove 4 are polished to be white. By polishing and whitening, the welding quality can be ensured in the welding process.
Further, in the step S3, the positioning welding is symmetrical positioning welding, and the length of each positioning welding is not less than 50mm. By adopting the symmetrical welding, when the ship bottom outer plate 1 and the depth finder 2 are welded, the depth finder 2 is uniformly stressed, and the installation precision of the depth finder 2 is ensured.
Further, in step S4, the first annular groove 3 is not lower than the upper end surface of the bottom outer plate 1 after full welding. In this embodiment, the welding leg size is increased after welding first annular groove 3 strictly forbidden, prevents that 2 atress inequalities of depth finder from leading to the installation accuracy to descend.
Further, in step S4, the welded second annular groove 4 is polished. The lower end surface of the ship bottom outer plate 1 is in water when sailing. By polishing the filling material of the second annular groove 4, extra resistance generated when the ship sails can be avoided; meanwhile, the subsequent coating operation is convenient.
Further, during welding, adjacent weld joints require: the joints between adjacent welding seams need to be staggered by more than 30mm, so that the welding joints are prevented from being concentrated, and the welding quality of the welding joints is ensured. And (3) welding defect treatment: when welding defects are found in the welding process, the welding can be continued after the welding defects need to be cleared in time, and the welding defects are not allowed to exist.
Further, welding construction is carried out by adopting CO2 gas shielded welding; adopting an E501T-1 flux-cored wire (phi 1.2 mm) and CO2 gas (the gas purity is more than or equal to 99.5%); the welding current of the first annular groove 3 is 210-250A; the welding current of the second annular groove 4 is 180-220A; welding bead interlayer temperature: below 250 ℃; width of single welding seam: less than 20 mm; thickness of single weld: 5mm or less; the requirements of adjacent weld joints are as follows: the joints between adjacent welding seams need to be staggered by more than 30 mm.
Further, after the test piece is left for 24 hours in step S5, the weld of the installation area of the depth finder 2 is subjected to a 100-% MT + UT flaw detection test to ensure that there is no welding defect.
The ship depth finder installation and welding method provided by the embodiment has the following advantages:
1. the requirement on the diameter precision of the opening at the corresponding position of the outer plate 1 at the bottom of the ship is reduced, and convenience is brought to the actual construction on site;
2. the total welding filling amount between the depth finder 2 and the outer plate 1 at the bottom of the ship is obviously reduced, and particularly the welding filling amount between the depth finder 2 and the second annular groove 4 at the lower part of the outer plate 1 at the bottom of the ship is greatly reduced, so that the welding stress and deformation of the depth finder are reduced;
3. the depth finder 2 and the upper part of the outer plate 1 at the bottom of the ship are separately provided with the first annular groove 3, so that multilayer multi-pass welding can be carried out in a welding groove, the welding seam cracking caused by the insufficient strength of a single-pass fillet weld is avoided, meanwhile, the first annular groove 3 is required to be fully welded, the stress concentration caused by the fillet weld is avoided, and the risk of cracking of the depth finder 2 in the welding process is greatly reduced;
4. the welding filling amount of the second annular groove 4 between the depth finder 2 and the outer plate 1 at the bottom of the ship is greatly reduced, the consumption of welding materials and energy is greatly reduced, the welding efficiency is improved, and meanwhile, the stress and the deformation generated by the depth finder 2 in the welding process are effectively reduced;
5. the cross-sectional shapes of welding seams between the depth sounder 2 and the ship bottom outer plate 1 are symmetrically distributed, so that the risk of overlarge welding deformation and even cracking caused by welding of an upper structure of the depth sounder 2 due to continuous accumulation of all welding stress and deformation from bottom to top is avoided.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. 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. The installation and welding method of the ship depth finder is characterized by comprising the following steps of:
s1, arranging a mounting hole for mounting a depth finder (2) on a bottom outer plate (1) of a ship;
s2, a first annular groove (3) and a second annular groove (4) are formed in the outer plate (1) at the bottom of the ship at the edge of the mounting hole, the first annular groove (3) is located at the upper end of the outer plate (1) at the bottom of the ship, and the second annular groove (4) is located at the lower end of the outer plate (1) at the bottom of the ship;
s3, mounting the depth finder (2) at the mounting hole, and performing positioning welding on the depth finder (2);
s4, performing full welding on the first annular groove (3) between the depth finder (2) and the outer plate (1) at the bottom of the ship; and fully welding the second annular groove (4) between the depth finder (2) and the outer plate (1) at the bottom of the ship.
2. The marine depth finder installation welding method according to claim 1, wherein in step S1, a cutting line is cut on the marine bottom outer plate (1), and the installation hole is cut according to the cutting line.
3. The marine depth finder installation welding method according to claim 1, wherein in step S1, the diameter of the installation hole is larger than the outer diameter of the depth finder (2).
4. The marine depth finder erection welding method according to claim 1, wherein the angle of the first annular groove (3) is 45 ° ± 5 °, and the angle of the second annular groove (4) is 45 ° ± 5 °.
5. The marine depth finder erection welding method according to claim 1, wherein the depth of the first annular groove (3) and the depth of the second annular groove (4) are both half the thickness of the marine bottom outer panel (1).
6. The marine depth finder installation welding method according to claim 1, wherein in step S2, both the first annular groove (3) and the second annular groove (4) are ground and whitened.
7. The marine depth finder installation welding method according to claim 1, wherein in step S3, the tack welding is symmetrical tack welding, and a length of each tack welding is not less than 50mm.
8. The ship depth finder installation welding method according to claim 1, wherein in step S4, the first annular groove (3) is not lower than the upper end face of the ship bottom outer plate (1) after full welding.
9. The ship depth finder installation welding method according to claim 1, wherein in step S4, the second annular groove (4) which is welded is ground.
10. The marine depth finder erection welding method according to claim 1, characterized by further comprising step S5, after leaving for 24 hours, performing 100% mt + ut flaw detection on the weld of the installation area of said depth finder (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980446.XA CN115255699A (en) | 2022-08-16 | 2022-08-16 | Ship depth finder mounting and welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210980446.XA CN115255699A (en) | 2022-08-16 | 2022-08-16 | Ship depth finder mounting and welding method |
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| CN115255699A true CN115255699A (en) | 2022-11-01 |
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| CN202210980446.XA Pending CN115255699A (en) | 2022-08-16 | 2022-08-16 | Ship depth finder mounting and welding method |
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| CN106903397A (en) * | 2017-03-31 | 2017-06-30 | 中国核工业第五建设有限公司 | The method of welding AP1000 nuclear power station CV cylinders and penetration piece sleeve |
| CN107248420A (en) * | 2017-05-31 | 2017-10-13 | 中国核工业第五建设有限公司 | The installation method of steel containment vessel of nuclear power station electrical penetration |
| CN111438461A (en) * | 2019-01-16 | 2020-07-24 | 江苏利柏特股份有限公司 | Welding groove form and welding process of container connecting pipe or blind flange connecting pipe |
| TWI771066B (en) * | 2021-06-18 | 2022-07-11 | 中國鋼鐵股份有限公司 | Simulation test method for welding lamellar tearing of high-strength steel plate for offshore underwater foundation |
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2022
- 2022-08-16 CN CN202210980446.XA patent/CN115255699A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530193A (en) * | 2012-01-17 | 2012-07-04 | 武汉船用机械有限责任公司 | Roller built in double-brake flange for large towing winch and manufacturing method thereof |
| CN103737157A (en) * | 2013-12-04 | 2014-04-23 | 江苏民生特种设备集团有限公司 | Method for welding boiler feedwater preheater |
| CN104959703A (en) * | 2015-07-02 | 2015-10-07 | 武汉铁锚焊接材料股份有限公司 | Welding method and application of maritime work high-strength steel plates |
| CN106903397A (en) * | 2017-03-31 | 2017-06-30 | 中国核工业第五建设有限公司 | The method of welding AP1000 nuclear power station CV cylinders and penetration piece sleeve |
| CN107248420A (en) * | 2017-05-31 | 2017-10-13 | 中国核工业第五建设有限公司 | The installation method of steel containment vessel of nuclear power station electrical penetration |
| CN111438461A (en) * | 2019-01-16 | 2020-07-24 | 江苏利柏特股份有限公司 | Welding groove form and welding process of container connecting pipe or blind flange connecting pipe |
| TWI771066B (en) * | 2021-06-18 | 2022-07-11 | 中國鋼鐵股份有限公司 | Simulation test method for welding lamellar tearing of high-strength steel plate for offshore underwater foundation |
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