CN103394835A - Argon filling protective hood for welding P91/T91 header pipes - Google Patents
Argon filling protective hood for welding P91/T91 header pipes Download PDFInfo
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- CN103394835A CN103394835A CN2013103537998A CN201310353799A CN103394835A CN 103394835 A CN103394835 A CN 103394835A CN 2013103537998 A CN2013103537998 A CN 2013103537998A CN 201310353799 A CN201310353799 A CN 201310353799A CN 103394835 A CN103394835 A CN 103394835A
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- argon
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- air inlet
- cover
- collecting box
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Abstract
The invention relates to an argon filling protective hood for welding P91/T91 header pipes and aims to solve the problems that in the prior art, when P91/T91 steel is welded, the welding quality is poor, the comprehensive mechanical properties of welding joints are easily lowered, argon gas is wasted, the cost is increased, the working efficiency is low, and the operation is cumbersome. The argon filling protective hood comprises an air inlet joint, an air inlet pipe, a cover plate, a breather ring, a closure plate and a positioning lid, wherein the bottom end of the air inlet joint is fixedly connected with the top end of the air inlet pipe; the top end of the breather ring is fixedly connected with the lower surface of the cover plate; the bottom end of the breather ring is fixedly connected with the upper surface of the closure plate; the bottom end of the air inlet pipe penetrates through the cover plate and then is fixedly mounted on the upper surface of the closure plate; the argon filling protective hood is arranged in a welded pipe; the positioning lid is mounted on the air inlet pipe in a sleeving manner and arranged above the welded pipe. The argon filling protective hood is used in the welding of P91/T91 header pipes.
Description
Technical field
The present invention relates to a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe.
Background technology
P91/T91 steel (the domestic grade of steel that P91 steel and T91 steel are corresponding is 10Cr9Mo1VNb) steel is that developed countries is in the successful heat-resisting steel grade of new type high temperature of research and development in 20 end of the centurys, because it has good creep rupture strength, heat endurance and high temperature and creep resistance ability.Therefore, the P91/T91 steel has become at present the first-selected main flow steel grade of high parameter thermal power generation unit high temperature steam pipeline and boiler heating surface pipe both at home and abroad.
But the P91/T91 steel grade, in welding process, very easily causes welding point to lose efficacy, and when pipe interior loses the argon protection, causes root of weld alloying element scaling loss, and then produces micro-crack, reduces the welding point comprehensive mechanical property.At present; argon-filled protection during welding mostly is each end of pipe is sealed; then to it, be filled with argon gas protection; because main steam pipe diameter is larger, slightly there is sealing bad, will affect the protection effect and cause a large amount of argon gas wastes; poor welding quality; increase cost, inefficiency, complex operation.
Summary of the invention
The present invention, in order to solve P91/T91 steel poor welding quality when welding in prior art, easily reduces the welding point comprehensive mechanical property, and the waste argon gas; increase cost; inefficiency, the problem of complex operation, and then a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe is provided.
The present invention addresses the above problem the technical scheme that adopts to be: described argon-filled protection cover comprises inlet suction port, air inlet pipe, cover plate, ventilation ring, closure plate and locating cover; Welded pipe is arranged on collecting box pipe; and the axis of welded pipe is vertical with the collecting box pipe axis; the bottom of inlet suction port is fixedly connected with the top of air inlet pipe; the top of ventilation ring is fixedly connected with the lower surface of cover plate; the bottom of ventilation ring is fixedly connected with the upper surface of closure plate, and the bottom of air inlet pipe is passed on the upper surface that cover plate is fixedly mounted on closure plate, and the argon-filled protection cover is arranged in welded pipe; locating cover is sleeved on air inlet pipe, and locating cover is arranged on the top of welded pipe.
The invention has the beneficial effects as follows: by the present invention, when welding, improved quality of weld joint, make comprehensive mechanical property more firm, save simultaneously the use of argon gas, Cost reduction, operating efficiency has improved 10%-25%, the present invention has simple in structure, characteristics easy to use, and the present invention can Reusability.
The accompanying drawing explanation
Fig. 1 is overall structure front view of the present invention, and Fig. 2 is the front view of locating cover 8, and Fig. 3 is the front view of air inlet pipe 2, and Fig. 4 is the front view of ventilation ring 4.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1-Fig. 4, a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described, described argon-filled protection cover comprises inlet suction port 1, air inlet pipe 2, cover plate 3, ventilation ring 4, closure plate 5 and locating cover 8; Welded pipe 6 is arranged on collecting box pipe 7; and the axis of welded pipe 6 is vertical with collecting box pipe 7 axis; the bottom of inlet suction port 1 is fixedly connected with the top of air inlet pipe 2; the top of ventilation ring 4 is fixedly connected with the lower surface of cover plate 3; the bottom of ventilation ring 4 is fixedly connected with the upper surface of closure plate 5, and the bottom of air inlet pipe 2 is passed on the upper surface that cover plate 3 is fixedly mounted on closure plate 5, and the argon-filled protection cover is arranged in welded pipe 6; locating cover 8 is sleeved on air inlet pipe 2, and locating cover 8 is arranged on the top of welded pipe 6.
The specific embodiment two: in conjunction with Fig. 1-Fig. 2, a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described, described locating cover 8 comprises sleeve pipe 8-1, plectane 8-2 and annulus 8-3; In plectane 8-2, be processed with in the heart hole 8-4, sleeve pipe 8-1 is fixed on plectane 8-2 upper surface, and annulus 8-3 is fixed on the lower surface of plectane 8-2, and other is identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1 and Fig. 3, a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described, described air inlet pipe 2 evenly is processed with eight the first venthole 2-1 near the sidewall of bottom, and other is identical with the specific embodiment one.
The specific embodiment four: in conjunction with Fig. 1 and Fig. 4, a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described, described ventilation ring 4 evenly is processed with a plurality of the second venthole 4-1 near the sidewall of bottom, and other is identical with the specific embodiment one.
The specific embodiment five: in conjunction with Fig. 1, a kind of argon-filled protection cover for P91/T91 collecting box pipe welding of present embodiment is described, described cover plate 3 be circular slab, the diameter of cover plate 3 is D, the numerical value of D is 50mm-420mm, other is identical with the specific embodiment one.
The specific embodiment six: a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described in conjunction with Fig. 1-Fig. 2; described argon-filled protection cover also comprises securing member 9; locating cover 8 is fixed on air inlet pipe 2 by securing member 9, and other is identical with the specific embodiment two.
The specific embodiment seven: in conjunction with Fig. 1, a kind of argon-filled protection cover for the welding of P91/T91 collecting box pipe of present embodiment is described, the arc of described closure plate 5 for raising up, other is identical with the specific embodiment one.
Operation principle
During work, the argon-filled protection cover vertically is placed in welded pipe 6; closure plate 5 is contacted with collecting box pipe 7; by inlet suction port 1, pass into argon gas; argon gas enters in ventilation ring 4 through air inlet pipe 2; last argon gas enters into welded pipe 6 and collecting box pipe 7 welds by a plurality of the second venthole 4-1, makes it obtain sufficient argon gas.
Claims (7)
1. argon-filled protection cover for P91/T91 collecting box pipe welding, it is characterized in that: described argon-filled protection cover comprises inlet suction port (1), air inlet pipe (2), cover plate (3), ventilation ring (4), closure plate (5) and locating cover (8), welded pipe (6) is arranged on collecting box pipe (7), and the axis of welded pipe (6) is vertical with collecting box pipe (7) axis, the bottom of inlet suction port (1) is fixedly connected with the top of air inlet pipe (2), the top of ventilation ring (4) is fixedly connected with the lower surface of cover plate (3), the bottom of ventilation ring (4) is fixedly connected with the upper surface of closure plate (5), the bottom of air inlet pipe (2) is passed cover plate (3) and is fixedly mounted on the upper surface of closure plate (5), the argon-filled protection cover is arranged in welded pipe (6), locating cover (8) is sleeved on air inlet pipe (2), and locating cover (8) is arranged on the top of welded pipe (6).
2. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 1, it is characterized in that: described locating cover (8) comprises sleeve pipe (8-1), plectane (8-2) and annulus (8-3); In plectane (8-2), be processed with in the heart hole (8-4), sleeve pipe (8-1) is fixed on plectane (8-2) upper surface, and annulus (8-3) is fixed on the lower surface of plectane (8-2).
3. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 1, it is characterized in that: described air inlet pipe (2) evenly is processed with eight the first ventholes (2-1) near the sidewall of bottom.
4. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 1, it is characterized in that: described ventilation ring (4) evenly is processed with a plurality of the second ventholes (4-1) near the sidewall of bottom.
5. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 1 is characterized in that: described cover plate (3) be circular slab, the diameter of cover plate (3) is D, the numerical value of D is 50mm-420mm.
6. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 2, it is characterized in that: described argon-filled protection cover also comprises securing member (9), locating cover (8) is fixed on air inlet pipe (2) by securing member (9).
7. a kind of argon-filled protection cover for P91/T91 collecting box pipe welding according to claim 1, is characterized in that: the arc of described closure plate (5) for raising up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103537998A CN103394835A (en) | 2013-08-14 | 2013-08-14 | Argon filling protective hood for welding P91/T91 header pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103537998A CN103394835A (en) | 2013-08-14 | 2013-08-14 | Argon filling protective hood for welding P91/T91 header pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103394835A true CN103394835A (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103537998A Pending CN103394835A (en) | 2013-08-14 | 2013-08-14 | Argon filling protective hood for welding P91/T91 header pipes |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384313A (en) * | 2002-06-14 | 2002-12-11 | 佟秀全 | Automatic submerged-arc welding method for boiler ppie header and head |
| CN202591899U (en) * | 2012-06-11 | 2012-12-12 | 山东恒涛节能环保有限公司 | Welding locating device of header pipe joint |
| WO2013058321A1 (en) * | 2011-10-19 | 2013-04-25 | 大陽日酸株式会社 | Tig welding method for ferrite-based stainless steel plates |
| CN203437838U (en) * | 2013-08-14 | 2014-02-19 | 哈尔滨哈锅锅炉工程技术有限公司 | Argon protective cover used for welding of P91 / T91 header pipe |
-
2013
- 2013-08-14 CN CN2013103537998A patent/CN103394835A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384313A (en) * | 2002-06-14 | 2002-12-11 | 佟秀全 | Automatic submerged-arc welding method for boiler ppie header and head |
| WO2013058321A1 (en) * | 2011-10-19 | 2013-04-25 | 大陽日酸株式会社 | Tig welding method for ferrite-based stainless steel plates |
| CN202591899U (en) * | 2012-06-11 | 2012-12-12 | 山东恒涛节能环保有限公司 | Welding locating device of header pipe joint |
| CN203437838U (en) * | 2013-08-14 | 2014-02-19 | 哈尔滨哈锅锅炉工程技术有限公司 | Argon protective cover used for welding of P91 / T91 header pipe |
Non-Patent Citations (1)
| Title |
|---|
| 曾会强等: "SA-335P91集箱焊接工艺试验研究及应用", 《能源工程焊接国际论坛》 * |
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Application publication date: 20131120 |