CN111571138A - Pipe comparison method for welding neck flange - Google Patents
Pipe comparison method for welding neck flange Download PDFInfo
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- CN111571138A CN111571138A CN202010442880.3A CN202010442880A CN111571138A CN 111571138 A CN111571138 A CN 111571138A CN 202010442880 A CN202010442880 A CN 202010442880A CN 111571138 A CN111571138 A CN 111571138A
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- pipe
- cylindrical part
- neck flange
- flange
- mandrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to the technical field of ships. The method for comparing the high-neck flange with the pipe is realized through pipe comparison tooling, the tooling comprises a core rod (1), the core rod (1) comprises a first cylindrical part, a second cylindrical part and a third cylindrical part (11, 12 and 13) which are sequentially connected, and a plurality of axial grooves (131) are uniformly distributed on the outer side wall of the third cylindrical part (13) in the circumferential direction; the method comprises the following steps: (1) processing a groove on the connecting end (21) of the pipe fitting (2) and the hubbed flange (3); (2) -inserting the free end (132) of the third cylindrical portion (13) into the tube (2); (3) a neck flange (3) is sleeved on the core rod (1), and a distance is reserved between the neck flange (3) and the pipe fitting (2); (4) spot welding is carried out at the joint intersection of the axial groove (131) of the third cylindrical part (13) of the mandrel and the weld joint; (5) and (3) removing the core rod (1) to complete the welding of the rest parts of the connecting ends of the pipe fitting (2) and the high-neck flange (3). The invention improves the concentricity accuracy of the high-neck flange compared with the pipe and improves the pipe comparison efficiency.
Description
Technical Field
The invention belongs to the technical field of a high-neck flange for a ship, and particularly relates to a method for comparing a pipe with the high-neck flange.
Background
In the process of prefabricating a single ship pipe of a ship, a plurality of high-neck flanges (accounting for about 15 percent of the total number) are not lacked, and the high-neck flanges are matched with the pipe to ensure that the assembly concentricity meets the requirement in the process of aligning the high-neck flanges and the pipe, so that the high-neck flanges are mostly cooperated by two persons in the past, one of the high-neck flanges consumes manpower, the other one of the high-neck flanges is easy to displace in the.
Disclosure of Invention
The invention aims to provide a method for comparing a high-neck flange with a pipe, which improves the concentricity accuracy of the high-neck flange with the pipe and greatly improves the pipe comparison efficiency.
The invention aims to realize the method for comparing the high-neck flange with the pipe by adopting the following technical scheme, and is characterized in that the method for comparing the high-neck flange with the pipe is realized by a pipe comparing tool;
the pipe comparison tool comprises a mandrel, the mandrel comprises a first cylindrical part, a second cylindrical part and a third cylindrical part which are sequentially connected, the diameter of the first cylindrical part is the same as that of the third cylindrical part, the diameter of the second cylindrical part is smaller than that of the first cylindrical part, and a plurality of axial grooves are uniformly distributed in the circumferential direction of the outer side wall of the third cylindrical part; the outer diameter of the core rod is smaller than the inner diameters of the pipe fitting and the neck flange;
the method for comparing the welding neck flange with the pipe comprises the following steps:
(1) processing a groove on the connecting end of the pipe fitting, and processing a groove on the connecting end of the welding neck flange;
(2) inserting the free end of the third cylindrical portion of the mandrel into the pipe; the connecting ends of the first cylindrical part, the second cylindrical part and the third cylindrical part are positioned outside the pipe fitting;
(3) a neck flange is sleeved on the mandrel, the tail end of the connecting end of the neck flange is positioned on the connecting end of the third cylindrical part, at the moment, a welding seam is reserved between the neck flange and the pipe fitting, and the positions of the mandrel and the neck flange are adjusted, so that a flange ring of the neck flange is vertically arranged with the mandrel;
(4) spot welding is carried out at the connecting and intersecting position of the axial groove of the third cylindrical part of the core rod and the welding seam;
(5) and (4) removing the core rod from the pipe fitting and the neck flange to complete the welding of the rest part of the connecting end of the pipe fitting and the neck flange.
Preferably, the outer diameter of the first cylindrical part and the third cylindrical part is 15.5-65 mm; the length of the first cylindrical part is 80-120mm, the length of the second cylindrical part is 40mm, and the total length of the core rod is 140-200 mm;
the axial groove is a rectangular groove, the depth of the axial groove is 3-5mm, and the width of the axial groove is 6-10 mm.
Preferably, the width of the weld is 2-3 mm.
Preferably, the axial fit clearance between the core rod and the pipe fitting and between the core rod and the high-neck flange is reserved by 0.5 mm.
Preferably, the distance from the tail end of the pipe fitting to the connecting end of the third cylindrical part is 10 mm.
Preferably, the number of the axial grooves is 4.
Preferably, the bevel angle of the pipe fitting connecting end and the groove angle of the high-neck flange connecting end are both 45 degrees.
Compared with the prior art, the invention has the following beneficial effects:
firstly, according to the inner diameter sizes of the welding neck flanges of different models, corresponding core rods are respectively manufactured to be matched (axial fit clearance is reserved by 0.5mm), grooves of positioning welding feet are milled on the core rods, so that a tooling part is prevented from being damaged during positioning welding, and meanwhile, four splines are milled at the connection positions in the pipe, so that four-point positioning welding of the pipe is facilitated, and the pipe can be conveniently detached from the pipe;
secondly, the invention numbers the tools of various types, stores them uniformly, manages them in a fixed position, and is convenient for taking and putting.
Thirdly, the precision and efficiency of the correction of the welding neck flange are obviously improved: 1. the concentricity of the calibration pipe is well guaranteed, and the precision is improved to 98%; 2. single-person operation is realized, and the efficiency is improved by 50 percent.
Drawings
FIG. 1 is a schematic structural view of a pipe-in-pipe apparatus for high neck process of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a view of the assembled relationship of the mandrel and pipe of the present invention;
FIG. 4 is a drawing of the assembled relationship of the mandrel, pipe, and hubbed flange of the present invention;
fig. 5 is a diagram of the fitting relationship of the pipe member and the hubbed flange of the eye plate of the present invention.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
As shown in fig. 1-2, the high neck method is compared with a pipe and is assembled, and comprises a mandrel 1, wherein the mandrel 1 comprises a first cylindrical part 11, a second cylindrical part 12 and a third cylindrical part 13 which are sequentially connected, the diameter of the first cylindrical part 11 is the same as that of the third cylindrical part 13, the diameter of the second cylindrical part 12 is smaller than that of the first cylindrical part 11, and a plurality of axial grooves 131 are uniformly distributed on the outer side wall of the third cylindrical part 13 in the circumferential direction; the outer diameter of the core rod 1 is smaller than the inner diameters of the pipe fitting 2 and the neck flange 3.
The number of axial grooves 131 is preferably 4.
The outer diameters of the first and third cylindrical parts 11 and 13 are 15.5-65 mm; the length of the first cylindrical part 11 is 80-120mm, the length of the second cylindrical part 12 is 40mm, and the total length of the core rod 1 is 140-200 mm;
the axial groove 131 is a rectangular groove, the depth of the axial groove 131 is 3-5mm, and the width of the axial groove 131 is 6-10 mm.
As shown in fig. 3-5, a hubbed flange pipe-aligning method includes the steps of:
(1) processing a groove at the connecting end 21 of the pipe fitting 2, and processing a groove at the connecting end 31 of the welding neck flange 3; the bevel angles are all 45 degrees;
(2) inserting the free end 132 of the third cylindrical portion 13 of the mandrel 1 into the tube 2; the connecting ends 133 of the first cylindrical part 11, the second cylindrical part 12 and the third cylindrical part 13 are positioned outside the pipe fitting 2;
(3) the mandrel 1 is sleeved with the neck flange 3, the tail end of the connecting end 31 of the neck flange 3 is positioned on the connecting end 133 of the third cylindrical part 13, at the moment, the distance between the neck flange 3 and the pipe fitting 2 is 2-3mm, the positions of the mandrel 1 and the neck flange 3 are adjusted, and the flange ring 30 of the neck flange 3 is ensured to be vertically arranged with the mandrel 1 by using the angle square 5;
(4) spot welding is carried out at the joint intersection of the axial groove 131 of the third cylindrical part 13 of the mandrel and the weld;
(5) and (3) removing the core rod 1 from the pipe fitting 2 and the neck flange 3 to complete the welding of the rest part of the connecting end of the pipe fitting 2 and the neck flange 3 and form a welding seam 6.
And axial fit clearance between the core rod 1 and the pipe fitting 2 and between the core rod 1 and the neck flange 3 is reserved by 0.5 mm.
The distance from the end of the pipe 2 to the connecting end 133 of the third cylindrical part 13 is 10 mm.
The parameters of the core rod and the pipe fitting of the invention are shown in table 1.
TABLE 1 core rod, pipe parameters
| Pipe type | D | L1 | L2 | L3 | B | H |
| φ22x3 | φ15.5 | 80 | 40 | 140 | 6 | 3 |
| φ27x3 | φ20.5 | 80 | 40 | 140 | 6 | 3 |
| φ34x3.5 | φ26.5 | 80 | 40 | 140 | 8 | 4 |
| φ34x4.5 | φ24.5 | 80 | 40 | 140 | 8 | 4 |
| φ42x4 | φ33 | 80 | 40 | 140 | 8 | 4 |
| φ42x5 | φ31 | 80 | 40 | 140 | 8 | 4 |
| φ48x4 | φ39 | 120 | 60 | 200 | 10 | 5 |
| φ48x5 | φ37 | 120 | 60 | 200 | 10 | 5 |
| φ60x4 | φ51 | 120 | 60 | 200 | 10 | 5 |
| φ60x5.5 | φ48 | 120 | 60 | 200 | 10 | 5 |
| φ76x5 | φ65 | 120 | 60 | 200 | 10 | 5 |
The above description is only a preferred embodiment of the present invention, and it should be understood that the present invention is not limited to the above description, but the present invention can be modified within the scope of the present invention.
Claims (7)
1. A method for comparing a high-neck flange with a pipe is characterized in that the method for comparing the high-neck flange with the pipe is realized through a pipe comparing tool;
the pipe comparison tool comprises a mandrel (1), the mandrel (1) comprises a first cylindrical part (11), a second cylindrical part (12) and a third cylindrical part (13) which are sequentially connected, the diameter of the first cylindrical part (11) is the same as that of the third cylindrical part (13), the diameter of the second cylindrical part (12) is smaller than that of the first cylindrical part (11), and a plurality of axial grooves (131) are uniformly distributed on the outer side wall of the third cylindrical part (13) in the circumferential direction; the outer diameter of the core rod (1) is smaller than the inner diameters of the pipe fitting (2) and the high-neck flange (3);
the method for comparing the welding neck flange with the pipe comprises the following steps:
(1) processing a groove on the connecting end (21) of the pipe fitting (2), and processing a groove on the connecting end (31) of the welding neck flange (3);
(2) inserting the free end (132) of the third cylindrical portion (13) of the mandrel (1) into the pipe (2); the connecting ends (133) of the first cylindrical part (11), the second cylindrical part (12) and the third cylindrical part (13) are positioned outside the pipe fitting (2);
(3) a neck flange (3) is sleeved on the mandrel (1), the tail end of a connecting end (31) of the neck flange (3) is positioned on a connecting end (133) on the third cylindrical part (13), at the moment, a distance is reserved between the neck flange (3) and the pipe fitting (2), and the positions of the mandrel (1) and the neck flange (3) are adjusted, so that a flange ring (30) of the neck flange (3) is vertically arranged with the mandrel (1);
(4) spot welding is carried out at the joint intersection of the axial groove (131) of the third cylindrical part (13) of the mandrel and the weld joint;
(5) and (3) removing the core rod (1) from the pipe fitting (2) and the neck flange (3) to complete the welding of the rest parts of the connecting ends of the pipe fitting (2) and the neck flange (3).
2. A method of welding a neck flange to a pipe according to claim 1 wherein the first and third cylindrical portions (11, 13) have an outer diameter of from 15.5 to 65 mm; the length of the first cylindrical part (11) is 80-120mm, the length of the second cylindrical part (12) is 40mm, and the total length of the mandrel (1) is 140-200 mm;
the axial groove (131) is a rectangular groove, the depth of the axial groove (131) is 3-5mm, and the width of the axial groove (131) is 6-10 mm.
3. A method of welding a neck flange to a pipe according to claim 1 or 2, characterised in that the width of the weld seam (4) is 2-3 mm.
4. A method for producing a pipe by using a hubbed flange according to claim 3, wherein the axial fit clearance between the mandrel (1) and the pipe (2) and between the mandrel (1) and the hubbed flange (3) is reserved by 0.5 mm.
5. A method of welding a neck flange to a pipe according to claim 2, characterised in that the distance from the end of the pipe element (2) to the connecting end (133) of the third cylindrical portion (13) is 10 mm.
6. A method of welding a neck flange to a pipe as claimed in claim 2 wherein the number of axial slots (131) is 4.
7. A method according to claim 2, wherein the included angle between the connecting end (21) of the pipe (2) and the connecting end (31) of the hubbed flange (3) is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442880.3A CN111571138B (en) | 2020-05-22 | 2020-05-22 | Pipe comparison method for welding neck flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442880.3A CN111571138B (en) | 2020-05-22 | 2020-05-22 | Pipe comparison method for welding neck flange |
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| Publication Number | Publication Date |
|---|---|
| CN111571138A true CN111571138A (en) | 2020-08-25 |
| CN111571138B CN111571138B (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010442880.3A Active CN111571138B (en) | 2020-05-22 | 2020-05-22 | Pipe comparison method for welding neck flange |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3960311A (en) * | 1973-11-27 | 1976-06-01 | Welding Controls Limited | Backing ring assembly for pipes |
| CN202137554U (en) * | 2011-07-05 | 2012-02-08 | 中国北车集团大同电力机车有限责任公司 | Automatic rotating device for welding hollow shaft |
| CN202398979U (en) * | 2012-01-05 | 2012-08-29 | 杭州思创恒业机械设备有限公司 | Positioning device for assembling and welding connecting pipe and flange |
| CN202411681U (en) * | 2011-12-21 | 2012-09-05 | 哈电集团（秦皇岛）重型装备有限公司 | Butt welding device for straight pipe with small aperture |
| CN202447851U (en) * | 2011-12-31 | 2012-09-26 | 扬州秋源压力容器制造有限公司 | Butt welding tool of connecting pipe and flange pipe |
| CN104089117A (en) * | 2014-07-04 | 2014-10-08 | 威海石岛重工有限公司 | Welding neck lined flange |
| CN105666001A (en) * | 2016-03-29 | 2016-06-15 | 苏州市合叶精密机械有限公司 | Welding fixture suitable for long pipe flange |
| CN205363142U (en) * | 2015-12-18 | 2016-07-06 | 上海锅炉厂有限公司 | Pipe positioning core axle |
| CN109500542A (en) * | 2018-12-26 | 2019-03-22 | 中国建筑第八工程局有限公司 | The positioning device and its construction method of pipeline welding |
| CN110238601A (en) * | 2019-05-17 | 2019-09-17 | 陕西飞机工业（集团）有限公司 | A kind of anti-deformation plug for the welding of two straight catheters |
-
2020
- 2020-05-22 CN CN202010442880.3A patent/CN111571138B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3960311A (en) * | 1973-11-27 | 1976-06-01 | Welding Controls Limited | Backing ring assembly for pipes |
| CN202137554U (en) * | 2011-07-05 | 2012-02-08 | 中国北车集团大同电力机车有限责任公司 | Automatic rotating device for welding hollow shaft |
| CN202411681U (en) * | 2011-12-21 | 2012-09-05 | 哈电集团（秦皇岛）重型装备有限公司 | Butt welding device for straight pipe with small aperture |
| CN202447851U (en) * | 2011-12-31 | 2012-09-26 | 扬州秋源压力容器制造有限公司 | Butt welding tool of connecting pipe and flange pipe |
| CN202398979U (en) * | 2012-01-05 | 2012-08-29 | 杭州思创恒业机械设备有限公司 | Positioning device for assembling and welding connecting pipe and flange |
| CN104089117A (en) * | 2014-07-04 | 2014-10-08 | 威海石岛重工有限公司 | Welding neck lined flange |
| CN205363142U (en) * | 2015-12-18 | 2016-07-06 | 上海锅炉厂有限公司 | Pipe positioning core axle |
| CN105666001A (en) * | 2016-03-29 | 2016-06-15 | 苏州市合叶精密机械有限公司 | Welding fixture suitable for long pipe flange |
| CN109500542A (en) * | 2018-12-26 | 2019-03-22 | 中国建筑第八工程局有限公司 | The positioning device and its construction method of pipeline welding |
| CN110238601A (en) * | 2019-05-17 | 2019-09-17 | 陕西飞机工业（集团）有限公司 | A kind of anti-deformation plug for the welding of two straight catheters |
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| Publication number | Publication date |
|---|---|
| CN111571138B (en) | 2021-11-26 |
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