CN218455401U - Heat exchanger tube head structure capable of ensuring root penetration - Google Patents
Heat exchanger tube head structure capable of ensuring root penetration Download PDFInfo
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- CN218455401U CN218455401U CN202222736049.6U CN202222736049U CN218455401U CN 218455401 U CN218455401 U CN 218455401U CN 202222736049 U CN202222736049 U CN 202222736049U CN 218455401 U CN218455401 U CN 218455401U
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Abstract
The utility model relates to a welded joint technical field of shell and tube heat exchanger tube sheet and heat exchange tube, concretely relates to ensure heat exchanger tube head structure that root welded through, including tube sheet and heat exchange tube, the tube sheet is opened there is the tube hole, and the tip of heat exchange tube penetrates in the tube hole, and the port concave yield tube sheet surface height of heat exchange tube is 0.5 ~ 1mm, and the port of tube hole is opened has the welding groove of the frustum shape of falling, and the angle of welding groove is 35 ~ 50, and the height of welding groove is 1.5 ~ 2.5mm, as the improvement be: the bottom of the welding groove is provided with transversely arranged annular steps around the periphery of the pipe hole, and a concave fillet is arranged at the transition part of the annular steps and the side wall of the welding groove. Because the step is arranged at the bottom of the welding groove, the bottom of the groove is widened, the difficulty of fusing the root of the groove is reduced, and the qualification rate is improved. And moreover, the concave fillet between the annular step and the welding groove enables the transition to be smoother, the filler wire welding can reach the root position more easily, and the root penetration is ensured.
Description
Technical Field
The utility model relates to a welded joint technical field of shell and tube heat exchanger tube sheet and heat exchange tube, concretely relates to ensure heat exchanger tube head structure of root penetration.
Background
In chemical equipment, a tube type heat exchanger is an important device, and a welded joint of a tube plate and a heat exchange tube is the most important welded joint which is most prone to failure in the device, and the quality of the welded joint directly influences the service life of the device and the stability of the device. At present, the connection joint of a heat exchange tube and a tube plate of a heat exchanger is divided into two types according to different working conditions: the fuse head and fillet weld. In a common melt head type joint, a groove is formed in a heat exchange tube hole in a tube plate, when the common melt head type joint is assembled, a heat exchange tube extends out of the surface of the tube plate and is directly welded by adopting argon arc welding twice, a tube bundle does not rotate, an arc striking is at a six-point position, an arc closing is at a twelve-point position, and a single tube head is adopted for welding during welding, so that the conventional welding joint and welding method have the problem of low efficiency.
The Chinese patent document with the publication number of CN102151958A discloses a welding method of a heat exchanger tube plate and a welding joint of a heat exchange tube, wherein a structure which is recessed 0.5-1mm from the surface of the tube plate is adopted in the assembly of the heat exchange tube and the tube plate, so that a tungsten electrode can easily penetrate into the root part of an included angle between the heat exchange tube and the tube plate in the welding process, and an electric arc can reach a sharp corner position in the self-fluxing welding process.
However, in practice, as shown in fig. 4, the above method has a 45 ° bevel or R2 bevel between the inner wall of the tube hole of the tube plate and the outer wall of the tube hole of the heat exchange tube, and a narrow corner is formed between the bottom of the bevel and the heat exchange tube, so that the welding space is small, welding fusion is difficult during welding, and the yield is low.
Disclosure of Invention
There is above-mentioned technical problem to prior art, the utility model provides a ensure heat exchanger tube head structure of root penetration.
In order to achieve the above object, the utility model provides a following technical scheme:
the heat exchanger tube head structure capable of ensuring root penetration comprises a tube plate and a heat exchange tube, wherein the tube plate is provided with a tube hole, the end part of the heat exchange tube penetrates into the tube hole, the surface of the port of the heat exchange tube, which is recessed into the tube plate, is 0.5-1mm high, the port of the tube hole is provided with an inverted frustum-shaped welding groove, the angle of the welding groove is 35-50 degrees, and the height of the welding groove is 1.5-2.5 mm, and the heat exchanger tube head structure is characterized in that: the bottom of the welding groove is provided with transversely arranged annular steps around the periphery of the pipe hole, and a concave fillet is arranged at the transition part of the annular steps and the side wall of the welding groove.
As a further alternative, the width of the annular step is 0.8 to 1.2mm.
As a further alternative, the width of the annular step is 1mm.
As a further alternative, the height of the end opening of the heat exchange tube, which is recessed into the surface of the tube plate, is 1 +/-0.1 mm, the height of the welding groove is 2 +/-0.1 mm, and the angle of the welding groove is 45 degrees.
As a further alternative, a sunken annular groove is formed in the annular step close to the heat exchange tube, so that an annular protrusion is formed between the side wall of the annular groove and the side wall of the tube hole.
As a further alternative, the depth direction of the annular groove is parallel to the axial direction of the pipe hole, or parallel to the side wall of the welding groove.
As a further alternative, the annular step is provided with an annular hook bulge, and a fulcrum abutting against the outer wall of the heat exchange tube is arranged at the bent part of the hook bulge.
As a further alternative, the hook projection tapers in thickness from the root portion upwards.
The utility model has the advantages that:
the utility model discloses an ensure heat exchanger tube head structure of root penetration, owing to set up the step in the bottom of welding groove, widen the groove bottom, reduce the degree of difficulty of fusing groove root, improve the qualification rate. And moreover, the concave fillet between the annular step and the welding groove enables the transition to be smoother, the filler wire welding can reach the root position more easily, and the root penetration is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a heat exchanger tube head structure for ensuring root penetration in an embodiment.
FIG. 2 is a schematic diagram of a heat exchanger tube head structure with root penetration assurance according to another embodiment.
FIG. 3 is a schematic diagram of a heat exchanger tube head structure with root penetration assurance according to yet another embodiment.
Fig. 4 is a schematic structural diagram of a tube structure of a heat exchanger in the background art.
Reference numerals:
the heat exchanger comprises a tube plate 1, a heat exchange tube 2, a welding groove 3, an annular step 4, an annular groove 5, an annular bulge 6 and a hook bulge 7.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
Example 1
The utility model discloses an ensure one of heat exchanger tube head structure embodiment of root penetration, as shown in fig. 1, including traditional common structure: tube sheet 1 and heat exchange tube 2, tube sheet 1 is opened there is the tube hole, and the tip of heat exchange tube 2 penetrates in the tube hole, and the port of heat exchange tube 2 indent tube sheet surface height h is 0.5 ~ 1mm, and the port of tube hole is opened has the welding groove 3 of frustum of an inverted cone shape, and the angle theta of welding groove 3 is 35 ~ 50, and the height x of welding groove 3 is 1.5 ~ 2.5mm, as the improvement:
the bottom of the welding groove 3 is provided with the annular steps 4 which are transversely arranged around the periphery of the pipe hole, the bottom of the welding groove 3 is widened by the annular steps 4, the difficulty of fusing the root of the groove is reduced, and the qualification rate is improved. Concave fillets R are arranged at the transition positions of the annular steps 4 and the side walls of the welding grooves 3, so that the transition is smoother, the filler wire welding can reach the root position more easily, and the root penetration is ensured.
In particular, the width z of the annular step 4 is between 0.8 and 1.2mm, preferably 1mm.
Preferably, the height h of the port of the heat exchange tube 2 recessed into the surface of the tube plate is 1 +/-0.1 mm, the height of the welding groove x is 2 +/-0.1 mm, and the angle of the welding groove 3 is 45 degrees.
Example 2
The utility model discloses a ensure the heat exchanger tube structure's of root penetration two embodiment, as shown in FIG. 2, the main technical scheme of this embodiment is the same with embodiment 1, and the explanation in embodiment 1 is adopted to the characteristics unexplained in this embodiment, no longer has repeated here. The difference between the embodiment and the embodiment 1 is that a sunken annular groove 5 is arranged at a position, close to the heat exchange tube 2, of the annular step 4, so that an annular protrusion 6 is formed between the side wall of the annular groove 5 and the side wall of the tube hole, and during welding, the annular protrusion 6 is heated and melted by using an argon arc welding machine and is welded with the outer wall of the heat exchange tube 2 into a whole.
In fig. 2, the depth direction of the annular groove 5 is parallel to the axial direction of the pipe hole, and integral casting or turning and milling machining can be adopted. In addition, the side wall of the welding groove 3 can be changed into a side wall parallel to the welding groove, so that the formed annular bulge 6 is larger in size, and the primary welding effect is better.
Example 3
The utility model discloses a ensure three of the specific implementation modes of heat exchanger tube structure of root penetration, as shown in FIG. 3, the main technical scheme of this embodiment is the same with embodiment 1, and the explanation in embodiment 1 is adopted to the characteristics unexplained in this embodiment, no longer has repeated here. The difference between the embodiment and the embodiment 1 is that the annular step 4 is provided with an annular hook protrusion 7, the bending part of the hook protrusion 7 is provided with a fulcrum which is abutted against the outer wall of the heat exchange tube 2, the fulcrum plays a certain positioning role in the heat exchange tube 2, the effect of the fulcrum is the same as that of the annular protrusion in the embodiment 2 during welding, and a smoother step is formed after hot melting.
In the figure 3, the thickness of the hook bulge is gradually reduced from the root part to the top, and the molten pool formed is more ideal when the hook bulge is melted from high speed to low speed.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides a ensure heat exchanger tube head structure of root penetration, includes tube sheet and heat exchange tube, the tube sheet is opened there is the tube hole, the tip of heat exchange tube penetrates in the tube hole, and the port of heat exchange tube is recessed tube sheet surface height and is 0.5 ~ 1mm, the port of tube hole is opened has the welding groove of inverted frustum shape, the angle of welding groove is 35 ~ 50, and the height of welding groove is 1.5 ~ 2.5mm, characterized by: the bottom of the welding groove is provided with transversely arranged annular steps around the periphery of the pipe hole, and a concave fillet is arranged at the transition part of the annular steps and the side wall of the welding groove.
2. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 1, wherein: the width of the annular step is 0.8-1.2 mm.
3. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 2, wherein: the width of the annular step is 1mm.
4. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 1, wherein: the height of the end opening of the heat exchange tube, which is recessed into the surface of the tube plate, is 1 +/-0.1 mm, the height of the welding groove is 2 +/-0.1 mm, and the angle of the welding groove is 45 degrees.
5. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 1, wherein: a sunken annular groove is formed in the position, close to the heat exchange tube, of the annular step, so that an annular protrusion is formed between the side wall of the annular groove and the side wall of the tube hole.
6. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 5, wherein: the depth direction of the annular groove is parallel to the axial direction of the pipe hole or parallel to the side wall of the welding groove.
7. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 1, wherein: the annular step is provided with an annular hook bulge, and a fulcrum abutting against the outer wall of the heat exchange tube is arranged at the bent part of the hook bulge.
8. The heat exchanger tube head structure for ensuring root penetration as claimed in claim 7, wherein: the hook projection has a thickness gradually decreasing from the root portion upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222736049.6U CN218455401U (en) | 2022-10-17 | 2022-10-17 | Heat exchanger tube head structure capable of ensuring root penetration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222736049.6U CN218455401U (en) | 2022-10-17 | 2022-10-17 | Heat exchanger tube head structure capable of ensuring root penetration |
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| CN218455401U true CN218455401U (en) | 2023-02-07 |
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| CN202222736049.6U Active CN218455401U (en) | 2022-10-17 | 2022-10-17 | Heat exchanger tube head structure capable of ensuring root penetration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026170A (en) * | 2023-02-27 | 2023-04-28 | 四川禧上热能科技有限公司 | High-pressure fin type heat exchange device and manufacturing method |
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2022
- 2022-10-17 CN CN202222736049.6U patent/CN218455401U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026170A (en) * | 2023-02-27 | 2023-04-28 | 四川禧上热能科技有限公司 | High-pressure fin type heat exchange device and manufacturing method |
| CN116026170B (en) * | 2023-02-27 | 2023-06-09 | 四川禧上热能科技有限公司 | High-pressure fin type heat exchange device and manufacturing method |
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