CN113458551A - Welding method and connecting pipe between double containers of narrow-gap double-container water heater - Google Patents
Welding method and connecting pipe between double containers of narrow-gap double-container water heater Download PDFInfo
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- CN113458551A CN113458551A CN202110609039.3A CN202110609039A CN113458551A CN 113458551 A CN113458551 A CN 113458551A CN 202110609039 A CN202110609039 A CN 202110609039A CN 113458551 A CN113458551 A CN 113458551A
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- water heater
- connecting pipe
- hole
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- container
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a welding method and a connecting pipe between double containers of a narrow-gap double-container water heater, which replace the prior symmetrical connecting structure of an upper container and a lower container and realize the connection of the upper container and the lower container with a gap of 4mm-8 mm. The connecting pipe is of a boss structure with a small diameter at the upper end, the outer diameter of the small diameter of the boss structure is matched with the diameter of the upper liner through hole of the water heater, and the inner diameter of the lower end of the connecting pipe is larger than the diameter of the lower liner through hole of the water heater. The welding method adopts the connecting pipe, and the outer wall of the bottom of the connecting pipe and the outer edge of the surface of the through hole of the lower container of the water heater are welded together by using MAG; the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater are welded together by TIG; and then the small diameter of the upper end boss of the connecting pipe is extended into the through hole of the upper container of the water heater, and the upper end of the small diameter part of the upper end boss of the connecting pipe and the through hole of the upper container of the water heater are welded together by TIG. The invention realizes metallurgical bonding, has the advantage of high strength and is safer.
Description
Technical Field
The invention relates to a method for welding double containers of a narrow-gap double-container water heater and a connecting pipe.
Background
The double-liner electric water heater is a water-storage type electric water heater with new structure, new function and new appearance, it adopts double-liner ultrathin novel appearance and reasonable structure, and has the functions of quick heating and capacity-changing, and has higher hot water output rate, and its different heating modes can obtain hot water with different capacities and heating speeds.
At present, an upper liner and a lower liner of a double-liner electric water heater are mainly connected in a connecting pipe mode, namely the upper liner and the lower liner are respectively welded with the connecting pipe through a T-shaped joint. The connecting method is suitable for the condition that the gap between the upper liner and the lower liner of the double-liner electric water heater is large, and if the gap between the upper liner and the lower liner of the double-liner electric water heater is small (4mm-8mm), because the upper part and the lower part of the double-liner electric water heater need fillet welds with certain fusion width, and when the weld on one side is welded and the weld on the other side is welded, a welding gun is difficult to extend into the gap, so the connection cannot be realized by using the connecting method.
Disclosure of Invention
Based on the defects, the invention provides a welding method and a connecting pipe between double containers of a narrow-gap double-container water heater, which replace the prior symmetrical connecting structure of an upper container and a lower container and realize the connection of the upper container and the lower container with a gap of 4mm-8 mm.
The technical scheme adopted by the invention is as follows: the connecting pipe for connecting the two liners of the narrow-gap double-liner water heater is of a boss structure with a small diameter at the upper end, the outer diameter of the small diameter part of the boss structure is matched with the diameter of a through hole of the upper liner of the water heater, and the inner diameter of the lower end of the connecting pipe is larger than the diameter of the through hole of the lower liner of the water heater.
The invention also provides a welding method between the double containers of the narrow-gap double-container water heater, which adopts the connecting pipe, the narrow gap is 4mm-8mm, and the method comprises the following steps:
welding the outer wall of the bottom of the connecting pipe and the outer edge of the surface of the through hole of the lower liner of the water heater together by using MAG; the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater are welded together by TIG;
and step two, contacting the outer edge of the through hole of the upper container of the water heater with the plane of a boss at the upper end of the connecting pipe, extending the small diameter of the boss at the upper end of the connecting pipe into the through hole of the upper container of the water heater, and welding the upper end of the boss at the upper end of the connecting pipe and the inner wall of the through hole of the upper container of the water heater together by TIG.
Furthermore, the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater are welded together by TIG, and the melting depth needs to be controlled to enable the connecting pipe to be formed smoothly.
Furthermore, the upper end of the thin neck of the upper end boss of the connecting pipe is welded with the through hole of the upper liner of the water heater by TIG, so that the melting depth needs to be as deep as possible, and the upper liner of the water heater is stably connected with the connecting pipe.
The invention has the advantages that: the connection of the narrow-gap double-liner water heater is realized, the welding method of MAG welding and TIG welding is used for welding each joint to form a good welding seam, the welding strength of each welding seam is ensured, the comprehensive mechanical property of the joint is improved, compared with the enamel structure which is commonly used at present, the metallurgical bonding is realized, the strength is high, the safety is higher, the method can be quickly applied to the actual production, and the connection efficiency of the double-liner water heater is improved.
Drawings
FIG. 1 is a schematic view of the connection structure of the upper and lower liners and the connecting pipe of a narrow-gap double-liner water heater;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of the bottom outer wall of the coupling tube and the lower bladder of the water heater welded together using MAG;
FIG. 4 is a schematic view of the inside of the bottom of the connecting tube and the lower bladder of the water heater being welded together using TIG;
FIG. 5 is a schematic view of the upper end of the thin neck of the upper end boss of the connecting pipe and the through hole of the upper liner of the water heater being welded together by TIG;
Detailed Description
The invention is further illustrated by way of example in the accompanying drawings of the specification:
example 1
As shown in fig. 1, the adopted connecting pipe is a boss structure with a small diameter at the upper end, the outer diameter of the small diameter part of the boss structure is matched with the diameter of the through hole of the upper liner of the water heater, the inner diameter of the lower end of the connecting pipe is 1 mm larger than the diameter of the through hole of the lower liner of the water heater, and the height of the small diameter is 0.5 mm larger than the thickness of the inner wall of the lower liner of the water heater, because a TIG welding mode is adopted, a base material with a certain margin is required to be left;
a welding method between double containers of a narrow-gap double-container water heater is disclosed, wherein the narrow gap is 4mm-8mm, and the welding method comprises the following steps:
the method comprises the following steps: as shown in fig. 2, the bottom outer wall of the connecting pipe and the outer edge of the surface of the through hole of the lower container of the water heater are welded together by using MAG;
step two: as shown in fig. 3, the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater are welded together by TIG, and the melting depth is controlled to enable the connecting pipe to be formed smoothly;
step three: as shown in fig. 4, the outer edge of the through hole of the upper liner of the water heater is contacted with the plane of the boss at the upper end of the connecting pipe, the small diameter of the boss at the upper end of the connecting pipe is extended into the through hole of the upper liner of the water heater, the welding gun is extended into the liner opening, the upper end surface and the upper end of the small diameter part of the boss at the upper end of the connecting pipe are welded with the outer edge of the through hole of the upper liner of the water heater and the inner wall of the upper end of the through hole of the upper liner of the water heater by TIG, at the moment, the melting depth needs to be as deep as possible, so that the upper liner is stably connected with the connecting pipe, and the connecting strength is high enough.
The welding can be used for completing the connection of the narrow-gap double-container water heater, and meanwhile, the connection strength is also ensured, and the connection structure has higher strength than that used at present.
Claims (5)
1. The utility model provides a two courage of narrow clearance two courage water heater are connected and are used connecting tube which characterized in that: the connecting pipe is of a boss structure with a small diameter at the upper end, the outer diameter of the small diameter of the boss structure is matched with the diameter of the upper liner through hole of the water heater, and the inner diameter of the lower end of the connecting pipe is larger than the diameter of the lower liner through hole of the water heater.
2. The connecting pipe for connecting the double containers of the narrow-gap double-container water heater according to claim 1, wherein: the height of the small diameter is slightly larger than the thickness of the inner wall of the lower container of the water heater.
3. A method for welding the double containers of a narrow-gap double-container water heater, which adopts the connecting pipe as claimed in claim 1, wherein the narrow gap is 4mm-8mm, and is characterized by comprising the following steps:
welding the outer wall of the bottom of the connecting pipe and the outer edge of the surface of the through hole of the lower liner of the water heater together by using MAG; the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater are welded together by TIG;
and step two, contacting the outer edge of the through hole of the upper container of the water heater with the plane of a boss at the upper end of the connecting pipe, extending the small diameter of the boss at the upper end of the connecting pipe into the through hole of the upper container of the water heater, and welding the upper end of the boss at the upper end of the connecting pipe and the through hole of the upper container of the water heater together by TIG.
4. The welding method between the double bladders of the narrow-gap double-bladder water heater according to claim 3, wherein: and welding the inner side of the bottom of the connecting pipe and the inner wall of the through hole of the lower liner of the water heater together by using TIG (tungsten inert gas), and controlling the fusion depth to enable the connecting pipe to be formed smoothly.
5. The welding method between the double bladders of the narrow-gap double-bladder water heater according to claim 3 or 4, wherein: the upper end of the thin neck of the upper end boss of the connecting pipe is welded with the inner wall of the through hole of the upper liner of the water heater by TIG, so that the melting depth needs to be as deep as possible, and the upper liner of the water heater is stably connected with the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609039.3A CN113458551A (en) | 2021-06-01 | 2021-06-01 | Welding method and connecting pipe between double containers of narrow-gap double-container water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609039.3A CN113458551A (en) | 2021-06-01 | 2021-06-01 | Welding method and connecting pipe between double containers of narrow-gap double-container water heater |
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| Publication Number | Publication Date |
|---|---|
| CN113458551A true CN113458551A (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110609039.3A Pending CN113458551A (en) | 2021-06-01 | 2021-06-01 | Welding method and connecting pipe between double containers of narrow-gap double-container water heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941903A (en) * | 2021-02-10 | 2022-08-26 | 芜湖美的厨卫电器制造有限公司 | Inner container and water heater |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05161970A (en) * | 1991-11-25 | 1993-06-29 | Toshiba Corp | Method for welding |
| CN1640351A (en) * | 2004-01-12 | 2005-07-20 | 陈安涛 | Processing method for communicating internal-external wall pipes for two-layer stainless steel wacuum thermal insulating container |
| CN101619900A (en) * | 2009-08-13 | 2010-01-06 | 王树 | Connection assembly for pressure-bearing type heat exchange water tank |
| CN102679554A (en) * | 2012-05-18 | 2012-09-19 | 广东格美淇电器有限公司 | Inner container of electric water heater with single welding line |
| CN103791738A (en) * | 2013-09-08 | 2014-05-14 | 张伟 | Multi-tube heating water storage heat exchanger with pressure borne by closed tubes and manufacturing technology thereof |
| CN105108281A (en) * | 2015-08-29 | 2015-12-02 | 中国北车集团大连机车车辆有限公司 | Welding process for oil pipe of main transformer of electric locomotive |
| CN112378085A (en) * | 2020-11-30 | 2021-02-19 | 艾欧史密斯(中国)热水器有限公司 | Water storage device and water heater and manufacturing method thereof |
-
2021
- 2021-06-01 CN CN202110609039.3A patent/CN113458551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05161970A (en) * | 1991-11-25 | 1993-06-29 | Toshiba Corp | Method for welding |
| CN1640351A (en) * | 2004-01-12 | 2005-07-20 | 陈安涛 | Processing method for communicating internal-external wall pipes for two-layer stainless steel wacuum thermal insulating container |
| CN101619900A (en) * | 2009-08-13 | 2010-01-06 | 王树 | Connection assembly for pressure-bearing type heat exchange water tank |
| CN102679554A (en) * | 2012-05-18 | 2012-09-19 | 广东格美淇电器有限公司 | Inner container of electric water heater with single welding line |
| CN103791738A (en) * | 2013-09-08 | 2014-05-14 | 张伟 | Multi-tube heating water storage heat exchanger with pressure borne by closed tubes and manufacturing technology thereof |
| CN105108281A (en) * | 2015-08-29 | 2015-12-02 | 中国北车集团大连机车车辆有限公司 | Welding process for oil pipe of main transformer of electric locomotive |
| CN112378085A (en) * | 2020-11-30 | 2021-02-19 | 艾欧史密斯(中国)热水器有限公司 | Water storage device and water heater and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941903A (en) * | 2021-02-10 | 2022-08-26 | 芜湖美的厨卫电器制造有限公司 | Inner container and water heater |
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Application publication date: 20211001 |