CN110142525B - Riding type large pipe seat welding method - Google Patents
Riding type large pipe seat welding method Download PDFInfo
- Publication number
- CN110142525B CN110142525B CN201910405422.XA CN201910405422A CN110142525B CN 110142525 B CN110142525 B CN 110142525B CN 201910405422 A CN201910405422 A CN 201910405422A CN 110142525 B CN110142525 B CN 110142525B
- Authority
- CN
- China
- Prior art keywords
- welding
- seat
- pipe
- tube
- pipe seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a saddle type large pipe seat welding method, which comprises the following steps: A) marking the central line of the pipe hole of the pipe seat on the cylinder body, and marking an abdomen surfacing welding filling range line on the cylinder body according to the size of the pipe seat; B) metal is bead-welded on the belly of the barrel to a position higher than the shoulder according to a filling range line of the belly bead-welding, and the outer edge of the bead-welded metal is larger than the outer diameter of the tube seat; C) processing a pipe hole of a pipe seat on the cylinder, and processing the top of the surfacing metal into a plane by taking the center line of the pipe hole as a normal line, wherein the plane is vertical to the center line of the pipe hole and is higher than the shoulder; D) processing a groove at one end of a pipe seat connected with the cylinder; E) assembling the tube seat and the tube body and welding a butt weld of the tube seat and the tube body; the invention can reduce the welding difficulty and groove processing difficulty of the tube seat fillet weld, improve the stability and reliability of the welding quality, facilitate the realization of the automation and intellectualization of the tube seat fillet weld, reduce the welding labor intensity and improve the operating environment.
Description
Technical Field
The invention relates to a pipe seat welding method, in particular to a saddle type large pipe seat welding method for a power station boiler header.
Background
The header is an important pressure-bearing part of a power station boiler, as shown in figure 1, a plurality of tube seats 7 with the diameter of phi 100 mm-phi 355.6mm and the wall thickness of 10-75 mm are arranged on a cylinder body 6 of the header, and the welding bevel of the tube seats is a saddle-shaped bevel on the welded cylinder body 6 of the header in a bevel connection mode, so the tube seats of the type are generally called saddle-type large tube seats, and the welding characteristics are that the outer diameter of the cylinder body 6 of the header is smaller than that of the tube seats 7, the cross sections of a shoulder welding seam 8 (the position with the minimum filling amount of the welding seam) and an abdomen welding seam 9 (the position with the maximum filling amount of the welding seam) are greatly different, the positions of the two welding seams are 90 degrees different in the; the tube seat 7 has thick wall thickness, large welding filling amount, more welding passes and large welding pass arrangement difficulty; the welding is carried out at the transverse welding position, the saddle fall is large, the requirement on weld forming control is high, and the welding difficulty is very high; therefore, manual or semi-automatic welding operation modes such as manual argon tungsten-arc welding assembly point, bottoming and manual electric arc welding filling cover surface or manual or semi-automatic welding operation modes such as manual argon tungsten-arc welding assembly point, bottoming, manual electric arc welding transition, gas shielded welding filling and cover surface are usually adopted for the tube seats, the automation degree is low, the labor intensity is high, the welding environment is poor, and the quality of welding completely depends on the operation level and the responsibility of a welder.
Disclosure of Invention
The invention aims to provide a container circumferential weld ray detection device aiming at the defects in the prior art, which can reduce the welding difficulty and the groove processing difficulty of the tube seat fillet weld, improve the stability and the reliability of the welding quality, facilitate the realization of the automation and the intellectualization of the tube seat fillet weld, reduce the welding labor intensity and improve the working environment.
In order to achieve the purpose, the invention discloses a saddle type large pipe seat welding method which is characterized by comprising the following steps of: A) marking the central line of the pipe hole of the pipe seat on the cylinder body, and marking an abdomen surfacing welding filling range line on the cylinder body according to the size of the pipe seat; B) metal is bead-welded on the belly of the barrel to a position higher than the shoulder according to a filling range line of the belly bead-welding, and the outer edge of the bead-welded metal is larger than the outer diameter of the tube seat; C) processing a pipe hole of a pipe seat on the cylinder, and processing the top of the surfacing metal into a plane by taking the center line of the pipe hole as a normal line, wherein the plane is vertical to the center line of the pipe hole and is higher than the shoulder; D) processing a groove at the end of the tube seat connected with the tube body; e) Assembling the tube seat and the tube body and welding a butt weld of the tube seat and the tube body;
according to the position of a tube seat, marking a tube body belly overlaying position line, overlaying the tube body belly to a position not lower than a shoulder, processing tube holes of the tube body, processing overlaying metal into a plane which is not lower than the shoulder and is vertical to the tube hole line, and finally installing and welding the tube seat on the tube body; the connection between the cylinder and the tube seat is converted from the saddle-shaped groove fillet weld into the annular plane butt weld, so that the welding difficulty of the tube seat fillet weld is reduced, the stability and the reliability of the welding quality are improved, the groove processing difficulty can be reduced, the welding labor intensity is reduced, and the operating environment is improved;
as a further improvement of the invention, the surfacing metal is a circular table provided with an inner hole, the outer diameter of the top of the circular table is larger than that of the pipe seat, and the inner hole of the circular table is smaller than that of the pipe seat; the overlaying workload can be reduced, and the intensity of the overlaying layer is improved;
as a further improvement of the invention, in the step B, the height of the surfacing metal above the shoulder is not less than 5 mm; the height of the plane in the step C is at least 0.5 mm higher than the shoulder; welding defects of surfacing metal after machining can be avoided, and the barrel body is prevented from being damaged;
as a further improvement of the invention, in the step D, the end, connected with the cylinder, of the tube seat is processed into an annular J-shaped groove with a reserved truncated edge b, a radius R and an angle alpha; the width of the groove can be reduced, welding materials can be saved, and the welding efficiency can be improved;
as a further improvement of the invention, the surfacing welding or welding in the steps B and E is one of automatic welding, special machine welding or manual welding, and full penetration is realized; because the welding difficulty is reduced, any one of the welding processes can be adopted, and the automation and the intellectualization of the fillet weld of the tube seat can be conveniently realized by adopting the automation welding;
in conclusion, the invention can reduce the welding difficulty and the groove processing difficulty of the fillet weld of the tube seat, improve the stability and the reliability of the welding quality, facilitate the realization of the automation and the intellectualization of the fillet weld of the tube seat, reduce the labor intensity of welding and improve the working environment.
Drawings
Fig. 1 is a comparison view of a welding structure of a shoulder welding seam and an abdomen welding seam of a conventional cylinder and a tube seat.
FIG. 2 is a front view of a belly weld overlay in an embodiment of the invention.
Fig. 3 is a left side view of fig. 2.
FIG. 4 is a schematic view of the machining of the pipe hole and the surfacing welding plane in the embodiment of the invention.
Fig. 5 is a left side view of fig. 4.
FIG. 6 is a schematic view of the tube assembly welding according to the embodiment of the present invention.
Fig. 7 is a left side view of fig. 6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The welding method of the saddle-type large pipe seat comprises the following steps: A) marking the central line of the pipe hole of the pipe seat on the cylinder body, and marking an abdomen surfacing welding filling range line on the cylinder body according to the size of the pipe seat; B) as shown in fig. 2 and 3, metal 2 is overlaid on the belly of a cylinder 1 to a position higher than the shoulder according to a belly overlaying filling range line, the distance h higher than the shoulder is not less than 5mm, the overlaid metal 2 is a circular table with an inner hole, the outer diameter of the top of the circular table is greater than that of a pipe seat, the inner hole aperture d1 of the circular table is smaller than the inner diameter d of the pipe seat, and the overlaying adopts intelligent control automatic welding which can realize automatic identification of a welding seam, automatic tracking, automatic arrangement of a welding bead and a welding layer, continuous or intermittent welding and the like; c) As shown in fig. 4 and 5, a pipe hole 3 of a pipe seat is machined on a cylinder 1, a surfacing metal 2 is also machined to form a through hole of the pipe seat, the top of the surfacing metal 2 is machined into a plane by taking the center line of the pipe hole as a normal line, the plane is perpendicular to the center line of the pipe hole, and the height of the plane is at least 0.5 mm higher than the shoulder; D) as shown in fig. 6 and 7, the end of the tube seat 4 connected with the tube body 1 is processed into an annular J-shaped groove with a reserved truncated edge b, a radius R and an angle α; e) Assembling a tube seat 4 and a cylinder body 1 and welding a butt weld 5 of the tube seat and the cylinder body, wherein the welding adopts intelligent automatic welding which can ensure full penetration, realize automatic identification of a groove and a weld, automatic tracking, automatic arrangement of a weld bead and a weld layer, continuous or intermittent welding and the like;
according to the position of a tube seat, marking a tube body belly overlaying position line, overlaying the tube body belly to a position not lower than a shoulder, processing a tube hole 3 of the tube body, processing overlaying metal 2 into a plane which is not lower than the shoulder and is vertical to the tube hole line, and finally installing and welding the tube seat 4 on the tube body 1; the connection between the cylinder body 1 and the tube seat 4 is converted from the saddle-shaped groove fillet weld into the circumferential plane butt weld, so that the welding difficulty of the tube seat fillet weld is reduced, automatic welding can be adopted, the automation and the intellectualization of the welding of the tube seat fillet weld 5 are conveniently realized, the stability and the reliability of the welding quality are improved, the groove processing difficulty can be reduced, the welding labor intensity is reduced, and the operation environment is improved; the circumferential J-shaped groove can reduce the width of the groove, save welding materials and improve welding efficiency;
the present invention is not limited to the above-described embodiment, and the build-up welding or welding in steps B and E may be performed by a dedicated machine or by hand.
Claims (5)
1. A saddle type large pipe seat welding method is characterized by comprising the following steps: A) marking the central line of the pipe hole of the pipe seat on the cylinder body, and marking an abdomen surfacing welding filling range line on the cylinder body according to the size of the pipe seat; B) metal is bead-welded on the belly of the barrel to a position higher than the shoulder according to a filling range line of the belly bead-welding, and the outer edge of the bead-welded metal is larger than the outer diameter of the tube seat; C) processing a pipe hole of a pipe seat on the cylinder, and processing the top of the surfacing metal into a plane by taking the center line of the pipe hole as a normal line, wherein the plane is vertical to the center line of the pipe hole and is higher than the shoulder; D) processing a groove at one end of a pipe seat connected with the cylinder; e) And assembling the tube seat and the tube body and welding the butt weld of the tube seat and the tube body.
2. The saddle-type large pipe seat welding method according to claim 1, wherein: the surfacing metal is a circular table provided with an inner hole, the outer diameter of the top of the circular table is larger than that of the pipe seat, and the inner hole of the circular table is smaller than that of the pipe seat.
3. The saddle-type large pipe seat welding method according to claim 1 or 2, wherein: in the step B), the height of the surfacing metal above the shoulder is not less than 5 mm; the height of the plane in the step C) is at least 0.5 mm higher than the shoulder.
4. The saddle-type large pipe seat welding method according to claim 3, wherein: and D), processing one end of the tube seat connected with the tube body into an annular J-shaped groove with a reserved truncated edge b, a radius R and an angle alpha.
5. The saddle-type large pipe seat welding method according to claim 4, wherein: the surfacing in the step B) adopts one of automatic welding or manual welding, and the welding in the step E) adopts one of automatic welding or manual welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405422.XA CN110142525B (en) | 2019-05-16 | 2019-05-16 | Riding type large pipe seat welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405422.XA CN110142525B (en) | 2019-05-16 | 2019-05-16 | Riding type large pipe seat welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110142525A CN110142525A (en) | 2019-08-20 |
| CN110142525B true CN110142525B (en) | 2021-02-02 |
Family
ID=67595523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910405422.XA Active CN110142525B (en) | 2019-05-16 | 2019-05-16 | Riding type large pipe seat welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110142525B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112952A (en) * | 2019-12-30 | 2020-05-08 | 东方电气集团东方锅炉股份有限公司 | Integral forming process for pipe seat of boiler header |
| CN111331276A (en) * | 2020-03-24 | 2020-06-26 | 哈尔滨锅炉厂有限责任公司 | Welding structure of spherical end socket of boiler barrel and reinforcing plate and manufacturing method |
| CN114952053A (en) * | 2021-02-19 | 2022-08-30 | 东方电气集团东方锅炉股份有限公司 | Header and tube seat welding method |
| CN113211004B (en) * | 2021-03-31 | 2022-10-21 | 西安航天发动机有限公司 | Method for eliminating brazing blockage of annular workpiece with tube seat stainless steel interlayer structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63278671A (en) * | 1987-05-07 | 1988-11-16 | Mitsubishi Heavy Ind Ltd | Saddle type weld line welding method for pipe intersection part |
| CN1947911A (en) * | 2006-11-09 | 2007-04-18 | 上海锅炉厂有限公司 | Automatic submerged-arc build-up welding process for drum surface round flange |
| EP1769195B1 (en) * | 2004-07-05 | 2010-09-22 | Hitachi Power Europe GmbH | Establishing a connection between steam generator heating surfaces and a collector and/or distributor |
| CN103111730A (en) * | 2013-01-22 | 2013-05-22 | 北京中电华强焊接工程技术有限公司 | Saddle-shaped track automation welding method of collection box large tube socket |
| CN103170712A (en) * | 2013-03-29 | 2013-06-26 | 东方电气集团东方锅炉股份有限公司 | Tube socket fillet weld reheat crack prevention method |
| WO2015036189A1 (en) * | 2013-09-12 | 2015-03-19 | Endress+Hauser Flowtec Ag | Measuring tube for an ultrasonic flow measuring device and ultrasonic flow measuring device |
| CN108890166A (en) * | 2018-09-19 | 2018-11-27 | 张化机（苏州）重装有限公司 | The welding procedure of skirt and equipment lower head |
-
2019
- 2019-05-16 CN CN201910405422.XA patent/CN110142525B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63278671A (en) * | 1987-05-07 | 1988-11-16 | Mitsubishi Heavy Ind Ltd | Saddle type weld line welding method for pipe intersection part |
| EP1769195B1 (en) * | 2004-07-05 | 2010-09-22 | Hitachi Power Europe GmbH | Establishing a connection between steam generator heating surfaces and a collector and/or distributor |
| CN1947911A (en) * | 2006-11-09 | 2007-04-18 | 上海锅炉厂有限公司 | Automatic submerged-arc build-up welding process for drum surface round flange |
| CN103111730A (en) * | 2013-01-22 | 2013-05-22 | 北京中电华强焊接工程技术有限公司 | Saddle-shaped track automation welding method of collection box large tube socket |
| CN103170712A (en) * | 2013-03-29 | 2013-06-26 | 东方电气集团东方锅炉股份有限公司 | Tube socket fillet weld reheat crack prevention method |
| WO2015036189A1 (en) * | 2013-09-12 | 2015-03-19 | Endress+Hauser Flowtec Ag | Measuring tube for an ultrasonic flow measuring device and ultrasonic flow measuring device |
| CN108890166A (en) * | 2018-09-19 | 2018-11-27 | 张化机（苏州）重装有限公司 | The welding procedure of skirt and equipment lower head |
Non-Patent Citations (1)
| Title |
|---|
| 细丝小马鞍型埋弧焊试验及其在汽包管角焊缝上的应用;刘洪伟;《电焊机》;20100228;第40卷(第2期);第23-26及46页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110142525A (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110142525B (en) | Riding type large pipe seat welding method | |
| CN102699493B (en) | Carbon dioxide (CO2) gas shielded welding vertical downwards welding method for waste heat boiler heat pipe and connecting plate | |
| CN105195872A (en) | Double-sided submerged arc back-chipping-free welding technology for pipeline steel | |
| CN104339123A (en) | Bimetal composite pipe welding method | |
| CN102744499A (en) | Double-side double-arc welding process for root layer of pipeline | |
| CN108188549A (en) | A kind of submerged-arc welding process of nickel-base alloy air cooler plug formula bobbin carriage | |
| CN105414782A (en) | Isolated layer surfacing method of dissimilar steel welding joint | |
| CN113878204A (en) | Welding method of stainless steel composite plate | |
| CN101972885A (en) | Bushing-free narrow-gap pulse gas metal arc backing welding method of petroleum kelly bar | |
| CN108890092B (en) | Method for single-side welding and double-side forming of fusion electrode MAG welding tube plate | |
| CN101961811A (en) | Welding method of pipes on marine diesel engine | |
| CN107671398A (en) | A kind of narrow groove SAW automatic soldering techniques method of thick-walled pipe and welding head | |
| CN104439672A (en) | High frequency prewelding technology of longitudinal submerged arc welded pipe | |
| CN106392325A (en) | Laser welding method for stainless steel thick-wall pressure container | |
| CN111112952A (en) | Integral forming process for pipe seat of boiler header | |
| CN103752994A (en) | Circular seam welding process of thin-wall container | |
| CN108705266A (en) | A kind of processing technology of press-fit car wheel structure | |
| CN105618901A (en) | Left baffle for pipeline welding and gas protection device and welding tool | |
| CN113664342A (en) | Process for welding through strength welding joint between heat exchange tube and tube plate of reactor or heat exchanger | |
| CN110509010B (en) | Machining process for heavy-duty wheel seat ring | |
| CN104772551B (en) | Rubber film sealing coal gas cabinet bottom plate or top plate welding method | |
| CN210566125U (en) | Welding structure for intermediate shaft of transmission | |
| CN221019252U (en) | Circular seam welding structure of pressure vessel | |
| CN111151843A (en) | TIG (tungsten inert gas) wire-adding welding process for spiral weld joint on inner surface of automatic aluminum alloy spiral welded pipe | |
| CN111702358A (en) | Welding method and welding equipment for titanium window screws of CT (computed tomography) tubes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |