CN201950378U - Melting ring for butt welding of dissimilar steel heat exchange tube - Google Patents
Melting ring for butt welding of dissimilar steel heat exchange tube Download PDFInfo
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- CN201950378U CN201950378U CN2011200078614U CN201120007861U CN201950378U CN 201950378 U CN201950378 U CN 201950378U CN 2011200078614 U CN2011200078614 U CN 2011200078614U CN 201120007861 U CN201120007861 U CN 201120007861U CN 201950378 U CN201950378 U CN 201950378U
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Abstract
The utility model discloses a melting ring for the butt welding of a dissimilar steel heat exchange tube, which comprises a nickel-based alloy melting ring. When in an all-position butt welding process of the nickel-based alloy and the dissimilar steel heat exchange tube which is made of Cr-Mo heat resistant steel, the welding is realized by adding the nickel-based alloy melting ring with good high-temperature durability between the two types of metal, so that the convex parts and concave parts on the inner wall and the outer wall of a welding seam of the product do not exceed 0.2mm of the wall thickness, and the effectiveness of the nickel-based alloy butt welding back roof welding seam gas protection is ensured. The welding of a dissimilar steel technology is carried out by adopting the all-position welding method of backing the melting ring at the root of a groove and filling a silk cover surface or filling the melting ring in the whole groove depth, so that the wrong variable of welding is reduced; and the special structural form of the melting ring can ensure the airflow of the root and the surface of the groove is relatively balanced, and the butt welding of the thin-wall dissimilar steel heat exchange tube with a small diameter is completed through low-heat input, less welding deformation and the like.
Description
Technical field
The utility model relates to a kind of dissimilar steel heat exchanger tube butt welding with the fusing ring, in order to the difficult problem of the minor diameter thin wall dissimilar steel heat exchanger tube butt welding that solves HTGR demonstration reactor steam generator.
Background technology
At present, dissimilar steel butt welding is in the nuclear power generating equipment manufacturing and use comparatively extensively in producing, and the heat exchanger tube of Ni-based and stainless steel material becomes the main heat exchange unit in the nuclear power main equipment with its good corrosion resistance.Along with the fast development of nuclear power technology, with the HTGR be one of representative the 4th generation nuclear power technology begin to rise in the world gradually.But in high temperature gas-cooled manufacture process with steam generator, the foreign material heat exchanger tube be welded into one of main restricting factor of manufacturing.
Relate to the xenogenesis steel full position butt welding of nickel-bass alloy material, be still the bigger technological problems of difficulty up to now.Present stage, built-up welding transition zone metal is all adopted in the butt welding of nickel-base material dissimilar steel, and fills the process of transition metal in the butt joint groove, and all-position welding is seldom adopted to guarantee welding quality in most downhand welding position and horizontal position welding position of adopting.And adopting pre-heap separation layer in full position for the little thin-walled heat exchanger tube of diameter, the mode of filling transition metal can't realize.
The utility model content
In view of above-mentioned present situation, the utility model is in order to overcome the technology difficult problem of minor diameter dissimilar steel metal heat exchanger tube all-position welding, satisfy of the requirement of HTGR steam generator product to the moulding of dissimilar steel heat exchanger tube banjo fixing butt jointing quality surface, by nickel-base alloy fusing connector, in order to realize the minor diameter dissimilar steel heat exchanger tube full position butt welding of nickel-base alloy and Cr-Mo heat resisting steel.
Technical solution of the present utility model is: a kind of dissimilar steel heat exchanger tube butt welding comprises having nickel-base alloy fusing ring with the fusing ring.
According to such scheme, described fusing ring end face is parallel end faces or non-parallel end face.
In this was novel, the cross section of described fusing ring was rectangle or triangle or T shape or a bulge loop is arranged or near the internal diameter both sides of described fusing ring one sawtooth bulge loop is arranged near the external diameter both sides of described fusing ring.Can be by the end face of above-mentioned fusing ring or the difformity and the installation site in cross section, to satisfy the requirement of dissimilar steel heat exchanger tube all-position welding.
In this was novel, the end faces of both sides of described fusing ring was provided with a plurality of recessed air channels.
In this was novel, described fusing ring was that the interior ring end face of T section is parallel or the circular arc end face.
The beneficial effects of the utility model are in the full position butt welding of the dissimilar steel heat exchanger tube technical process of nickel-base alloy and Cr-Mo heat resisting steel, to adopt the mode of adding the nickel-base alloy fusing ring with good high temperature endurance performance between two kinds of metals to realize welding.According to the requirement of HTGR product heat exchange unit dissimilar steel heat exchanger tube butt joint, satisfy the 0.2mm that production joint inside and outside wall projection (depression) is no more than wall thickness, and the validity that guarantees nickel-base alloy butt welding back side root run gas shield.Select the fusing ring of respective material and version for use, utilize the automatic TIG welding connection technology, the STUDY ON THE WELDING of dissimilar steel technology is carried out in employing in the all-position welding mode of groove root fusing ring bottoming filling wire cover face or whole groove depth filling fusing ring.Both sides dissimilar steel metal heat exchanger tube can carry out groove centering by the version of fusing ring, reduces to weld wrong variable; The special version of fusing ring can guarantee the gas flow relative equilibrium on groove root and surface, and has controlled the projection and the depression of bevel for welding filling metal; With the low-heat input, modes such as less welding deformation are finished the butt welding of minor diameter thin wall dissimilar steel heat exchanger tube.Realize the made in China of HTGR demonstration reactor steam generator, fill up the blank of HTGR commercial operation in the world, for China develop the 4th generation nuclear power technology powerful technical support is provided.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is another embodiment that Fig. 1 is used to dock groove;
Fig. 3 is another embodiment of Fig. 1 circular arc T section;
Fig. 4 is another embodiment of Fig. 3 T section;
Fig. 5 is another embodiment that Fig. 4 has bulge loop;
Fig. 6 is another embodiment that Fig. 5 has the sawtooth bulge loop.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
See fusing ring shown in Figure 1.Comprise fusing ring 1, the cross section 2 of its fusing ring is a parallel end faces.Under this situation that fusing ring 1 can utilize with dissimilar steel heat exchanger tube groove root root face is fitted and the centering position is good, to melt ring 1 and be enclosed within the dissimilar steel heat exchanger tube groove root root face outside, fusing ring external diameter should be identical with the external diameter of dissimilar steel heat exchanger tube, and fusing ring 1 internal diameter is because of equaling the blunt limit thickness sum of dissimilar steel heat exchanger tube internal diameter and dissimilar steel heat exchanger tube groove root.
See fusing ring shown in Figure 2.Comprise fusing ring 1, the cross section 2 of its fusing ring is a groove shape.According to welding process requirement, the groove at dissimilar steel heat exchanger tube two ends is processed into one-sided 30 ° groove (angle can be determined according to actual conditions), fusing ring 1 is processed into groove shape by the cross section and cooperates with dissimilar steel heat exchanger tube root face to finish and assemble and weld.
Fig. 3 has provided another embodiment.The cross section 2 of given fusing ring 1 is a T shape.The interior ring of its T shape is an arcwall face.When the fusing ring 1 of this structure is used, select for use the inwall of dissimilar steel heat exchanger tube to position, earlier dissimilar steel heat exchanger tube end inwall is carried out wall thickness reduction processing, make the T shape boss of fusing ring 1 be stuck between the two dissimilar steel heat exchanger tubes, the minimum diameter of fusing ring 1 should be identical with dissimilar steel heat exchanger tube minimum diameter.
The fusing ring embodiment that Fig. 4 provides.What it was different with above-mentioned Fig. 3 is: the cross section 2 of described fusing ring 1 is a planar ends for the interior ring of T shape.Its function of use is identical with Fig. 3.
The fusing ring embodiment that Fig. 5 provides.The cross section 2 of described fusing ring 1 is that the external diameter both sides of close described fusing ring have a bulge loop 3.When the fusing ring 1 of this structure is used, select for use dissimilar steel heat exchanger tube outer wall to position, earlier dissimilar steel heat exchanger tube end outer wall is carried out wall thickness reduction processing, make the bulge loop 3 of fusing ring 1 be stuck between the two dissimilar steel heat exchanger tubes, the external diameter of fusing ring 1 should be identical with the external diameter of dissimilar steel heat exchanger tube.
Fig. 6 has provided the fusing ring embodiment different with Fig. 5.Different is that the internal diameter both sides of melting the cross section 2 close described fusing rings of ring 1 have a sawtooth bulge loop 3, is positioned at described sawtooth bulge loop 3 and is provided with a plurality of recessed air channels 4 with the end faces of both sides that fusing encircles.The fusing ring 1 of this structure selects for use dissimilar steel heat exchanger tube inwall to position; earlier dissimilar steel heat exchanger tube end inwall is carried out wall thickness reduction processing; make the bulge loop 3 of fusing ring 1 be stuck between the two dissimilar steel heat exchanger tubes; the minimum diameter of fusing ring should be identical with dissimilar steel heat exchanger tube minimum diameter; the recessed air channel 4 of vertical processing on the cross section 2 guarantees that in order to logical protective gas the gas shield of adapter inside and outside wall is good.
In above-mentioned, described recessed air channel 4 removes and is used under the situation of Fig. 6, can recessed air channel 4 be set in the end faces of both sides of the fusing ring 1 of described arbitrary structure.
In the present embodiment, the fusing ring adopts Ni-based 600 alloys as manufactured materials.According to different welding process requirement, select the fusing ring of corresponding construction form for use.
The automatic TIG welding connection technology is adopted in the dissimilar steel heat exchanger tube all-position welding of nickel-base alloy and Cr-Mo heat resisting steel, and the joint inside and outside wall welds in the space of comparatively sealing by argon shield.Control interlayer temperature and sweating heat input in the welding process.Behind outer wall (or inwall) finished edge with heat exchanger tube welding point end, utilize the auxiliary centering assembling of fusing ring, in order to guaranteeing the wrong variable of joint in the 0.2mm scope, and the validity that guarantees nickel-base alloy butt welding back side root run gas shield.
The nickel-base alloy fusing ring that embodiment of the present utility model provided, can realize the minor diameter dissimilar steel heat exchanger tube full position butt welding of nickel-base alloy and Cr-Mo heat resisting steel, to fill up domestic research, and finish the manufacturing of HTGR demonstration reactor steam generator these two kinds of material welding points.
Claims (5)
1. a dissimilar steel heat exchanger tube butt welding is characterized in that with the fusing ring it has nickel-base alloy fusing ring (1).
2. dissimilar steel heat exchanger tube butt welding according to claim 1 is characterized in that with the fusing ring described fusing ring end face is parallel end faces or non-parallel end face.
3. dissimilar steel heat exchanger tube butt welding according to claim 1 encircles with fusing, it is characterized in that the cross section (2) of described fusing ring (1) is for rectangle or triangle or T shape or a bulge loop (3) is arranged in the external diameter both sides of close described fusing ring or there is a sawtooth bulge loop internal diameter both sides of close described fusing ring.
4. dissimilar steel heat exchanger tube butt welding according to claim 1 is characterized in that with the fusing ring end faces of both sides of described fusing ring (1) is provided with a plurality of recessed air channels (4).
5. dissimilar steel heat exchanger tube butt welding according to claim 2 is characterized in that with the fusing ring described fusing ring is that the interior ring end face of T section (2) is parallel or the circular arc end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200078614U CN201950378U (en) | 2011-01-12 | 2011-01-12 | Melting ring for butt welding of dissimilar steel heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200078614U CN201950378U (en) | 2011-01-12 | 2011-01-12 | Melting ring for butt welding of dissimilar steel heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201950378U true CN201950378U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200078614U Expired - Lifetime CN201950378U (en) | 2011-01-12 | 2011-01-12 | Melting ring for butt welding of dissimilar steel heat exchange tube |
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| CN (1) | CN201950378U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016115821A1 (en) * | 2015-01-23 | 2016-07-28 | 李泽文 | Nickel-based alloy pressure-resistant shell and implementation method thereof |
| CN106735780A (en) * | 2017-01-18 | 2017-05-31 | 上海电气核电设备有限公司 | The joint design and welding method of a kind of tube butt welding |
| CN106944723A (en) * | 2017-05-05 | 2017-07-14 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of low-alloy steel heat exchanger tube docking automatic soldering technique for filling melting ring |
| CN106975826A (en) * | 2017-05-05 | 2017-07-25 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of nickel-base alloy heat exchanger tube docks automatic soldering technique |
| CN107052517A (en) * | 2017-05-05 | 2017-08-18 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of low-alloy steel docks automatic soldering technique with nickel-base alloy dissimilar steel heat exchange tube |
-
2011
- 2011-01-12 CN CN2011200078614U patent/CN201950378U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016115821A1 (en) * | 2015-01-23 | 2016-07-28 | 李泽文 | Nickel-based alloy pressure-resistant shell and implementation method thereof |
| CN106735780A (en) * | 2017-01-18 | 2017-05-31 | 上海电气核电设备有限公司 | The joint design and welding method of a kind of tube butt welding |
| CN106735780B (en) * | 2017-01-18 | 2019-10-22 | 上海电气核电设备有限公司 | A kind of joint structure and welding method of tube butt welding |
| CN106944723A (en) * | 2017-05-05 | 2017-07-14 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of low-alloy steel heat exchanger tube docking automatic soldering technique for filling melting ring |
| CN106975826A (en) * | 2017-05-05 | 2017-07-25 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of nickel-base alloy heat exchanger tube docks automatic soldering technique |
| CN107052517A (en) * | 2017-05-05 | 2017-08-18 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of low-alloy steel docks automatic soldering technique with nickel-base alloy dissimilar steel heat exchange tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |
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| CX01 | Expiry of patent term |