CN211072174U - Welding structure for forged pipes of quenching device header - Google Patents
Welding structure for forged pipes of quenching device header Download PDFInfo
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- CN211072174U CN211072174U CN201921312979.0U CN201921312979U CN211072174U CN 211072174 U CN211072174 U CN 211072174U CN 201921312979 U CN201921312979 U CN 201921312979U CN 211072174 U CN211072174 U CN 211072174U
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Abstract
The utility model relates to a quencher collection case forges a tub welded structure, including first, second body, first, second body have first, second link, first, second link includes first, second thickness face that is connected with first, second body inner peripheral surface and extends along first direction, first, second width face that is connected with first, second thickness face and extends along the second direction, first, second bevel face that is connected with first, second width face, first, second body outer peripheral face, form first, second welding area between first, second width face, first, second bevel face; during welding, the first thickness surface and the second thickness surface are jointed and attached, and the solder is filled in the first welding area and the second welding area. The utility model discloses guarantee the disposable qualification rate of welded reliability, welding seam, reduce welding groove angle, reduce welding packing volume, welding volume, reduce welding deformation and welding residual stress, improve welding quality, realize special materials's quench cooler collection case scale production.
Description
Technical Field
The utility model relates to a quencher collection case forges a tub welded structure.
Background
The development and utilization of petroleum refining, fine chemical engineering and large-scale ethylene engineering in China, and a plurality of chemical devices are required to be used in recent years in China. At present, the demand of domestic linear quencher of ethylene unit is huge, linear quencher adopts the design of jacket type inside and outside pipe structure, the inner tube is walked high temperature pyrolysis gas about reaching 1000 ℃ and is cooled down to about 500 ℃ through pressing from both sides the cover water with higher speed, it produces high-pressure high-temperature steam through inner tube high temperature pyrolysis gas to walk cooling water between outer tube and the inner tube jacket, the interior thimble assembly in bank couples together through the header, high temperature high-pressure steam gathers through the header and collects the steam admission pocket, deoxidization free water forms pure steam and promotes the steam turbine electricity generation in the steam pocket, reach the high-efficient conversion and the utilization of the energy.
At present, because a high-temperature and high-pressure collection box of a quencher is special in use condition, materials of the collection box need to be heat-resistant steel large-caliber thick-wall steel pipes, and collection box connecting pipes are thick-wall forging connecting pipes. Most of domestic pressure vessel manufacturers adopt the traditional 'riding type lap joint' groove, the thick wall forging is taken over the tip and is adopted more than 50 outer chamfer welding groove argon arc welder and just can enter into the welding tip, and the round hole that the internal diameter is unanimous is taken over with the thick wall to the processing of heavy-calibre thick wall header pipe. The two sides of a steel welding area are required to be preheated before welding by the heat-resistant steel material, welding can be carried out only when the temperature reaches 100-150 ℃, the welding condition is met and is the premise of ensuring the welding quality, the temperature is not lower than the temperature in the whole welding process, otherwise, cracks after welding can occur, and the welding difficulty of manual welding is high. The chamfering angle of the end part of the connecting pipe of the thick-wall forging piece is large, and the welding part of the large-caliber thick-wall header pipe is not chamfered, namely the welding grooves of two materials at the welding part are seriously asymmetric, so that the preheating temperature rising speeds of preheating parts of the two parts are inconsistent, namely the temperature rising speed of the thick-wall part is low, and the temperature rising speed of the thin-wall part is high. The welding quality of the part with sufficient preheating is higher than that of the part with insufficient preheating; meanwhile, the heat dissipation speed of the thick wall after welding is higher than that of the thin wall, and the riding type lap joint welding seam has larger residual stress due to the imbalance of the heat dissipation speed, so that welding cracks are easily generated; and the first welding seam of the riding type lap joint position is not consistent in welding penetration depth of two sides, the end part of the connecting pipe of the thick-wall forging piece is thin and easy to weld through, and the end part of the large-diameter header is thick and difficult to weld through, so that the welding defect of the first welding seam is easy to generate. Heat resistant steels are particularly troublesome to rework if they have defects, each rework resulting in a severe degradation of the mechanical properties of the material. Because the inner diameter of the forging connecting pipe is very small, manual welding is needed, the welding quality completely depends on the personal skill level of a welder, the quencher header operates at high temperature and high pressure, and the welding line must ensure that 100 percent UT is qualified. The manual welding has low production efficiency, the welding quality is greatly influenced by the personal skill level of a welder, and uncontrollable factors are more, so the welding stability is poor; in addition, the skilled welders who master the welding technology of the quenching device header by domestic manufacturing enterprises are few, the culture of the high-skill welders also needs a long period, the large-scale and industrialized production of the quenching device header is realized, the welding structure must be changed, the production efficiency is improved, and the welding quality is improved.
Disclosure of Invention
The utility model aims at providing a quencher collection case forges a welded structure, specifically is the welded structure who takes over and heavy-calibre thick wall collection case pipe for quencher collection case forging.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a welding structure of a forged pipe of a quenching device header comprises a first body and a second body, wherein the first body is provided with a first connecting end, the second body is provided with a second connecting end,
the first connecting end comprises a first thickness surface, a first width surface and a first bevel surface, wherein the first thickness surface is connected with the inner peripheral surface of the first body and extends along a first direction, the first width surface is connected with the first thickness surface and extends along a second direction, the first bevel surface is connected with the first width surface and the outer peripheral surface of the first body, and a first welding area is formed between the first width surface and the first bevel surface;
the second connecting end comprises a second thickness surface connected with the inner peripheral surface of the second body and extending along the first direction, a second width surface connected with the second thickness surface and extending along the second direction, and a second bevel surface connected with the second width surface and the outer peripheral surface of the second body, wherein a second welding area is formed between the second width surface and the second bevel surface;
during welding, the first thickness surface of the first body and the second thickness surface of the second body are in butt joint, and solder is filled in the first welding area and the second welding area.
Preferably, the first direction and the second direction are perpendicular.
Further preferably, the first direction is a radial direction of the first body and the second body; the second direction is the axial direction of the first body and the second body.
Preferably, the first width surface, the first bevel surface and/or the second width surface and the second bevel surface are connected by an arc chamfer.
Further preferably, the radius of the arc-shaped chamfer is 4-6mm, and an argon arc welding gun can penetrate into the arc-shaped chamfer to weld.
Preferably, the thickness of the first thickness surface is 1 +/-0.1 mm; the width of the first width surface is 1.5 +/-0.1 mm; the first bevel face and the radial section of the first body form an included angle of 20-60 degrees.
Preferably, the thickness of the second thickness surface is 1 +/-0.1 mm; the width of the second width surface is 1.5 +/-0.1 mm; and an included angle of 20-60 degrees is formed between the second bevel face and the radial section of the second body.
Preferably, the first connecting end and the second connecting end are symmetrical, the welding grooves are easy to butt, the misalignment amount is reduced, and the welding quality is improved.
Preferably, the first body is a large-caliber thick-wall header pipe, and the second body is a thick-wall forging connecting pipe, wherein the large-caliber thick-wall header pipe phi 406 × mm and the thick-wall forging connecting pipe phi 122 × mm are provided.
Further preferably, the inner diameter of the opening of the large-caliber thick-wall header pipe is equal to the inner diameter of the thick-wall forging connecting pipe, the welded inner wall of the thick-wall forging connecting pipe is attractive in appearance, and the weld reinforcement is greatly reduced.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model realizes the butt welding groove technology of the large-caliber thick-wall header pipe and the thick-wall connecting pipe, and avoids the phenomena that the body materials on the two sides of the welding groove are heated and have uneven temperature rise when the special heat-resistant steel material is preheated and the welding stress is unevenly distributed when welding;
the welding reliability can be ensured, the one-time qualification rate of welding seams is ensured, the angle of a welding groove is reduced, the welding filling amount and the welding amount are reduced, and the number of layers is reduced by about 30% compared with the traditional large-groove chamfer welding; the heating speeds of the workpieces on the two sides are basically consistent during preheating; the welding penetration depth of the materials on the two sides is basically consistent during welding, so that the welding residual stress is greatly reduced, the welding quality is improved, the labor production efficiency is greatly improved, the production period is shortened, the manufacturing cost is reduced, the effects of energy conservation and emission reduction are achieved, and the large-scale production of the quenching cooler header made of special materials is realized.
Drawings
FIG. 1 is a schematic view of a conventional "riding" lap joint configuration;
FIG. 2 is a schematic view of a prior art lap groove;
FIG. 3 is a schematic view of the "butt-joint type" butt-joint structure in the present embodiment;
FIG. 4 is a schematic view of a butt groove in this embodiment;
FIG. 5 is a schematic view of the connecting end of the large-diameter thick-wall header pipe and the thick-wall forging connecting pipe in this embodiment.
Wherein: 1. a first body; 10. an inner peripheral surface; 11. a first thickness surface; 12. a first width surface; 13. an outer peripheral surface; 14. a first bevel face; 15. a first weld region; 16. arc chamfering; 2. a second body; 20. an inner peripheral surface; 21. a second thickness surface; 22. a second width surface; 23. an outer peripheral surface; 24. a second bevel face; 25. a second weld region; 26. arc chamfering; 3. and (3) soldering.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral 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.
As shown in fig. 3, 4 and 5: a quencher header forged tube welding structure comprises a first body 1 and a second body 2, and in the embodiment: the first body 1 is a large-caliber thick-wall header pipe; the second body 2 is a thick-walled forging adapter. Wherein:
the first body 1 has a first connection end. The first connecting end comprises a first thickness surface 11, a first width surface 12 and a first bevel surface 14, wherein the first thickness surface 11 is connected with the inner peripheral surface 10 of the first body 1 and extends along a first direction, the first width surface 12 is connected with the first thickness surface 11 and extends along a second direction, the first bevel surface 14 is connected with the first width surface 12 and the outer peripheral surface 13 of the first body 1, and a first welding area 15 is formed between the first width surface 12 and the first bevel surface 14; further, the first width surface 12 and the first bevel surface 14 are connected by an arc-shaped chamfer 16. Specifically, the method comprises the following steps: the thickness of the first thickness surface 11 is 1 plus or minus 0.1 mm; the width of the first width surface 12 is 1.5 +/-0.1 mm; the included angle between the first bevel face 14 and the radial section of the first body 1 is 20-60 degrees, preferably 30 degrees; the radius of the arc chamfer 16 is 4-6mm, preferably 5 mm.
The second body 2 has a second connection end. The second connecting end comprises a second thickness surface 21 connected with the inner circumferential surface 20 of the second body 2 and extending along the first direction, a second width surface 22 connected with the second thickness surface 21 and extending along the second direction, and a second bevel surface 24 connected with the second width surface 22 and the outer circumferential surface 23 of the second body 2, and a second welding area 25 is formed between the second width surface 22 and the second bevel surface 24; in addition, the second width surface 22 and the second bevel surface 24 are connected by an arcuate chamfer 26. Specifically, the method comprises the following steps: the thickness of the second thickness surface 21 is 1 plus or minus 0.1 mm; the width of the second width surface 22 is 1.5 +/-0.1 mm; the second bevel face 24 and the radial section of the second body 2 form an included angle of 20-60 degrees, preferably 30 degrees; the radius of the arc-shaped chamfer 26 is 4-6mm, preferably 5 mm.
That is to say: the first connecting end and the second connecting end are symmetrical optimally, but in practice, the symmetrical welding structure is usually not realized due to the structure of the header pipe of the first body 1.
The first direction described above is a radial direction of the first body 1 and the second body 2, i.e. a horizontal direction in the drawing; the second direction is an axial direction of the first body 1 and the second body 2, i.e. a vertical direction in the figure, and the first direction and the second direction are perpendicular, that is to say: a first thickness surface 11, a first width surface 12; the second thickness surface 21 and the second width surface 22 are perpendicular to each other.
During soldering, the first thickness surface 11 of the first body 1 and the second thickness surface 21 of the second body 2 are butted and attached to each other, and the solder 3 is filled in the first soldering region 15 and the second soldering region 25 to connect them.
This embodiment can realize heat-resisting steel thick wall forging pipe and heavy-calibre thick wall collection case butt joint welded structure through reasonable welded structure, before this welding technique is implemented in scale, has done a large amount of welding experiments, including electric current, voltage during the welding, welding speed, preheat method and temperature control, welding machine send a wire speed etc. the observation of welding seam metallographic structure, the supersound UT inspection of welding seam, welding seam PT infiltration inspection, after a large amount of experiments are verified to be qualified, each parameter is stable just is used for the welding of equipment.
The welding structure solves the problems that the welding quality is limited by the manual welding skill level and the welding quality is unstable, can ensure 100 percent of welding qualified rate as long as the workpiece is processed in place, greatly improves the production efficiency and the welding quality, achieves the effects of energy conservation and emission reduction, and greatly reduces the manufacturing cost.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a quencher collection case forges tub welded structure which characterized in that: comprises a first body and a second body, wherein the first body is provided with a first connecting end, the second body is provided with a second connecting end,
the first connecting end comprises a first thickness surface, a first width surface and a first bevel surface, wherein the first thickness surface is connected with the inner peripheral surface of the first body and extends along a first direction, the first width surface is connected with the first thickness surface and extends along a second direction, the first bevel surface is connected with the first width surface and the outer peripheral surface of the first body, and a first welding area is formed between the first width surface and the first bevel surface;
the second connecting end comprises a second thickness surface connected with the inner peripheral surface of the second body and extending along the first direction, a second width surface connected with the second thickness surface and extending along the second direction, and a second bevel surface connected with the second width surface and the outer peripheral surface of the second body, wherein a second welding area is formed between the second width surface and the second bevel surface;
the first connecting end and the second connecting end are symmetrical, the first width surface, the first bevel surface and/or the second width surface and the second bevel surface are connected through an arc chamfer with the radius of 4-6mm,
during welding, the first thickness surface of the first body and the second thickness surface of the second body are in butt joint, and solder is filled in the first welding area and the second welding area.
2. The welded structure of a quencher header-forged tube as set forth in claim 1, wherein: the first direction and the second direction are vertical to each other.
3. The welded structure of a quencher header-forged tube as set forth in claim 2, wherein: the first direction is the radial direction of the first body and the second body; the second direction is the axial direction of the first body and the second body.
4. The welded structure of a quencher header-forged tube as set forth in claim 1, wherein: the thickness of the first thickness surface is 1 +/-0.1 mm; the width of the first width surface is 1.5 +/-0.1 mm; the first bevel face and the radial section of the first body form an included angle of 20-60 degrees.
5. The welded structure of a quencher header-forged tube as set forth in claim 1, wherein: the thickness of the second thickness surface is 1 +/-0.1 mm; the width of the second width surface is 1.5 +/-0.1 mm; and an included angle of 20-60 degrees is formed between the second bevel face and the radial section of the second body.
6. The welded structure of a quencher header-forged tube as set forth in claim 1, wherein: the first body is a large-caliber thick-wall header pipe; the second body is a thick-wall forging connecting pipe.
7. The welded structure of a quencher header-forged tube as set forth in claim 6, wherein: the inner diameter of the opening of the large-caliber thick-wall header pipe is equal to the inner diameter of the thick-wall forging connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921312979.0U CN211072174U (en) | 2019-08-14 | 2019-08-14 | Welding structure for forged pipes of quenching device header |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921312979.0U CN211072174U (en) | 2019-08-14 | 2019-08-14 | Welding structure for forged pipes of quenching device header |
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| Publication Number | Publication Date |
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| CN211072174U true CN211072174U (en) | 2020-07-24 |
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| CN201921312979.0U Active CN211072174U (en) | 2019-08-14 | 2019-08-14 | Welding structure for forged pipes of quenching device header |
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Address after: 215635 No.139 Gangfeng Road, Yangzijiang International Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (Jiangnan boiler) Patentee after: Jiangsu Jiangguo Intelligent Equipment Co.,Ltd. Address before: 215635 No.139 Gangfeng Road, Yangzijiang International Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (Jiangnan boiler) Patentee before: Jiangnan Boilers & Pressure Vessels (Zhangjiagang) Co.,Ltd. |