Welding tool for inner container of water heater

Abstract

The utility model discloses a water heater inner container welding tool which is used for welding a water heater inner container and a water pipe fitting, a through hole used for welding the water pipe fitting is formed in the water heater inner container, and the water heater inner container welding tool comprises a water pipe positioning unit and a frame body unit. The water pipe positioning unit comprises an inner container supporting part, a water pipe positioning part and a water pipe vertical adjusting part, the water pipe positioning part is arranged on the inner container supporting part, the inner container supporting part is used for supporting a water heater inner container, the water pipe positioning part extends out of the through hole, the water pipe positioning part is sleeved with a water pipe fitting, and the water pipe vertical adjusting part is used for adjusting the water pipe vertical adjusting part. The water pipe vertical adjusting part is used for adjusting the relative position of the end, away from the inner container supporting part, of the water pipe fitting and the end, close to the inner container supporting part, of the water pipe fitting. And the frame body unit is used for supporting the water pipe positioning unit. The utility model provides a water heater inner container welding tool which is used for positioning in the welding process of a water pipe fitting and a water heater inner container, avoids inclination in the welding process and is easy and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of water heaters, and in particular relates to a welding tool for an inner tank of a water heater. Background Art

[0002] The inner tank of an electric water heater, serving as the water storage device, must withstand high pressure for extended periods, especially when high-temperature gases are generated within the tank. Typically, the water pipes within the water heater tank are welded to achieve a sealed connection. To prevent leakage at the weld between the inner tank and the pipes under high pressure, the weld surfaces must be accurately positioned.

[0003] However, the existing water heater water pipe head welding tooling, especially for long water heater water pipe fittings, is prone to tilt in the vertical direction during welding, resulting in an excessively large gap between the water heater water pipe fitting and the water heater inner tank, causing uneven welding cross-sections, thin areas in some areas, and long-term high-pressure impact, resulting in water leakage.

[0004] Therefore, developing a water heater tank welding tool for positioning water pipe fittings and water heater tank during welding to avoid tilting during welding and with simple and convenient operation is a technical problem that needs to be solved urgently. Utility Model Content

[0005] The purpose of the utility model is to provide a water heater inner tank welding tool to solve the problem in the prior art that the water heater water pipe parts and the water heater inner tank are easily tilted in the vertical direction and the positioning is inaccurate when welding.

[0006] In order to achieve the above-mentioned utility model / design purpose, this utility model adopts the following technical solutions:

[0007] This application proposes a water heater inner tank welding tool, which is used for welding the water heater inner tank to a water pipe fitting. The water heater inner tank is provided with a through hole for welding the water pipe fitting, comprising:

[0008] A water pipe positioning unit, comprising an inner liner support portion, a water pipe positioning portion, and a water pipe vertical adjustment portion. The water pipe positioning portion is disposed on the inner liner support portion, the inner liner support portion being used to support the water heater inner liner. The water pipe positioning portion extends from the through hole, and the water pipe fitting is sleeved on the water pipe positioning portion. The water pipe vertical adjustment portion is used to adjust the relative position of the water pipe fitting away from the inner liner support portion and the end close to the inner liner support portion.

[0009] The frame unit is used to support the water pipe positioning unit.

[0010] In some embodiments of the present application, the water pipe vertical adjustment portion can move relative to the water pipe positioning portion along the axial direction of the through hole.

[0011] In some embodiments of the present application, a threaded positioning hole is provided on the water pipe positioning portion, and the threaded positioning hole is coaxially arranged with the through hole; the water pipe vertical adjustment portion includes a threaded connection end and a conical positioning end, and the threaded connection end is threadedly connected to the threaded positioning hole; the threaded connection end moves relative to the threaded positioning hole to the circumference of the conical positioning end and abuts against the end of the water pipe component away from the inner tank support portion.

[0012] In some embodiments of the present application, a water heater tank head is formed at the end of the water heater tank; it also includes a head shaping unit, which is used to support the water heater tank head; the head shaping unit is connected to the water pipe positioning unit.

[0013] In some embodiments of the present application, the inner tank support portion is configured to conform to the inner tank of the water heater, with the arc direction of the inner tank support portion facing downward; the frame unit supports the water pipe positioning unit from below.

[0014] In some embodiments of the present application, the water pipe positioning portion is arranged on the inner tank supporting portion along the vertical direction.

[0015] In some embodiments of the present application, the arc direction of the head contouring portion is arranged downward; and the frame unit supports the head contouring portion from below.

[0016] In some embodiments of the present application, a tapered introduction portion is formed along the circumference of the water pipe positioning portion, and the water pipe component is sleeved outside the water pipe positioning portion along the tapered introduction portion.

[0017] In some embodiments of the present application, an annular avoidance groove is formed on the inner tank support portion around the water pipe positioning portion, and the water pipe fitting passes through the through hole and is inserted into the annular avoidance groove; and / or, a handle is formed at the end of the water pipe vertical adjustment portion away from the inner tank support portion, and the user drives the water pipe vertical adjustment portion to rotate relative to the water pipe positioning portion by rotating the handle.

[0018] In some embodiments of the present application, the frame unit includes a horizontal support portion and a vertical support portion, the vertical support portion is arranged on the horizontal support portion, the vertical support portion is used to support the water pipe positioning unit, and the height of the vertical support portion is greater than the diameter of the water heater inner tank.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] By setting up a water heater inner tank welding tool for positioning the water heater inner tank and the water pipe fitting during the welding process, the welding accuracy and welding quality are improved; by setting up an inner tank support part for supporting the water heater inner tank, and by setting up a water pipe positioning part, which is set on the inner tank support part, when the inner tank is placed on the inner tank support part, the through hole opened in the water heater inner tank is sleeved on the water pipe positioning part, so that the water heater inner tank is accurately placed on the inner tank support part, and the end of the water pipe fitting is sleeved on the water pipe positioning part. The water pipe vertical adjustment part is used for the relative position of the end of the water pipe fitting away from the inner tank support part relative to the end of the water pipe fitting close to the inner tank support part, thereby ensuring the relative installation position of the water pipe fitting and the water heater inner tank, thereby ensuring the welding accuracy between the two.

[0021] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of the inner tank support portion, water pipe positioning portion and frame unit of an embodiment of a water heater inner tank welding tool proposed by the present invention;

[0024] Figure 2 yes Figure 1 A partial schematic diagram of the middle part;

[0025] Figure 3 yes Figure 2 Partial schematic diagram at point B in the middle;

[0026] Figure 4 This is a schematic diagram of the overall structure of an embodiment of a water heater inner tank welding tool installed with water pipe fittings proposed by the present utility model;

[0027] Figure 5 yes Figure 4 Partial schematic diagram at point C in the middle;

[0028] Figure 6 This is a side view of an embodiment of a water heater inner tank welding tooling installed with water pipe fittings proposed by the present utility model;

[0029] Figure 7 yes Figure 6 Cross-sectional view of FF;

[0030] Figure 8 This is a schematic diagram of the use of an embodiment of a water heater inner tank welding tool proposed by the utility model;

[0031] Figure 9 yes Figure 8 The local schematic diagram of point D in the middle;

[0032] Figure 10 This is a top view of an embodiment of a water heater inner tank welding tool proposed by the utility model;

[0033] Figure 11 yes Figure 10 Cross-sectional view of the middle GG;

[0034] Figure 12 yes Figure 11 A local schematic diagram of point E in FIG.

[0035] In the figure,

[0036] 100. Water heater tank;

[0037] 200, water pipe fittings;

[0038] 300, water pipe positioning unit;

[0039] 310, liner support portion;

[0040] 311, head profiling part;

[0041] 312, annular avoidance groove;

[0042] 320, water pipe positioning unit;

[0043] 321, threaded positioning hole;

[0044] 322, tapered lead-in portion;

[0045] 331, threaded connection end;

[0046] 332, tapered positioning end;

[0047] 333, Hand-held Department;

[0048] 400, frame unit;

[0049] 410, horizontal support portion;

[0050] 420, vertical support portion. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0055] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0056] In some embodiments of the present application, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown, it relates to a water heater inner tank welding tool, which is used for welding the water heater inner tank 100 and the water pipe fitting 200. The water heater inner tank welding tool is used to ensure the verticality of the welding of the water heater inner tank 100 and the water pipe fitting 200 during the welding process, thereby reducing the positioning error between the two.

[0057] In some embodiments of the present application, Figure 1 、 Figure 4 、 Figure 6 、 Figure 8 As shown, the water heater inner tank welding tool includes a water pipe positioning unit 300 and a frame unit 400.

[0058] The water heater inner tank 100 is provided with a through hole for welding the water pipe 200 .

[0059] The water pipe positioning unit 300 includes an inner container supporting portion 310 , a water pipe positioning portion 320 and a water pipe vertical adjustment portion.

[0060] The inner tank support portion 310 is used to support the water heater inner tank 100 during the welding process.

[0061] The water pipe positioning portion 320 is disposed on the inner container supporting portion 310 .

[0062] Specifically, the water pipe positioning portion 320 is specifically arranged on the inner tank support portion 310 , and needs to be arranged according to the position of the water pipe fitting that needs to be connected on the water heater inner tank 100 .

[0063] In some embodiments of the present application, the end of the water pipe member 200 that is sleeved on the water pipe positioning portion 320 is an end of the water pipe member 200 that is close to the inner tank supporting portion 310 .

[0064] The water pipe vertical adjustment portion is used to adjust the relative position of the end of the water pipe member 200 away from the inner container support portion 310 relative to the end close to the inner container support portion 310 .

[0065] During the welding process of the water pipe 200 relative to the water heater inner tank 100 , it is necessary to ensure that the axis of the water pipe 200 is coaxial with the through hole, thereby ensuring the relative installation position of the water pipe 200 and the water heater inner tank 100 .

[0066] The water pipe vertical adjustment portion is used to adjust one end of the water pipe member 200 away from the inner tank support portion 310 , thereby improving the position accuracy of the water pipe member 200 welded relative to the water heater inner tank 100 .

[0067] In some embodiments of the present application, in order to support the water pipe positioning unit 300, a frame unit 400 is further provided.

[0068] In some embodiments of the present application, the water pipe component 200 may be a water inlet pipe, and / or the water pipe component 200 may be a water outlet pipe.

[0069] The number of through holes provided on the water heater inner tank 100 may be several, and the number of through holes provided is determined by the number of water pipes 200 that need to be connected to the water heater inner tank 100 .

[0070] Correspondingly, the number of the water pipe positioning portions 320 is the same as the number of the through holes. The positions of the water pipe positioning portions 320 and the positions of the through holes correspond one to one.

[0071] Specifically, the cross-sectional area of ​​the water pipe positioning portion 320 is smaller than that of the through hole, thereby ensuring that the water pipe positioning portion 320 can extend from the through hole.

[0072] In some embodiments of the present application, the inner tank support portion 310 is used to support the water heater inner tank 100 during the welding process, and several water pipe positioning portions 320 respectively pass through several through holes to achieve relative positioning support between the water heater inner tank 100 and the water heater inner tank tooling.

[0073] Specifically, such as Figure 2 、 Figure 5 、 Figure 9 As shown, a water heater inner tank welding tool is developed, which is used for positioning water pipe fittings and water heater inner tank during welding to avoid tilting during the welding process. The operation is simple and convenient. The inner tank support part 310 is configured to imitate the water heater inner tank 100, so that the inner tank support part 310 can stably support the water heater inner tank 100.

[0074] In some embodiments of the present application, in order to achieve welding of the water pipe fitting 200 relative to the water heater inner tank 100, it is more convenient to extend the water pipe fitting 200 in the vertical direction during the welding process. Therefore, the water pipe positioning portion 320 is arranged on the inner tank support portion 310 in the vertical direction.

[0075] To facilitate the support of the inner tank 100 by the inner tank support 310, the inner tank support 310 is designed to conform to the inner tank 100, with the arc of the inner tank support 310 facing downward. The frame unit 400 supports the inner tank support 310 from below.

[0076] In some embodiments of the present application, Figure 1 、 Figure 4 、 Figure 6 、 Figure 8 As shown, the frame unit 400 includes a horizontal support portion 410 and a vertical support portion 420. The vertical support portion 420 is connected to the horizontal support portion 410. The horizontal support portion 410 is placed on a flat surface to provide overall support for the water heater tank welding tooling. Therefore, the horizontal support portion 410 extends horizontally for a certain length, thereby reducing the risk of the water heater tank welding tooling tipping over.

[0077] The vertical support portion 420 is disposed on the horizontal support portion 410. The vertical support portion 420 is used to support the water pipe positioning unit 300.

[0078] The vertical support portion 420 needs to meet a certain height to be able to support the inner tank support portion 310. That is, the height of the vertical support portion 420 must be higher than the diameter of the water heater inner tank 100.

[0079] In addition to adjusting the relative position of the water pipe fitting 200 away from or near the inner tank support 310, the water pipe vertical adjustment portion can also be moved closer to or further away from the inner tank support 310 along the axial direction of the through hole. This allows the fitting to be used with water pipe fittings 200 of varying lengths, thereby expanding the range of uses for the water heater inner tank welding tool.

[0080] In some embodiments of the present application, a threaded positioning hole 321 is formed on the water pipe positioning portion 320 , and the threaded positioning hole 321 is coaxially arranged with the through hole.

[0081] The water pipe vertical adjustment portion is threadedly connected to the threaded positioning hole 321 so as to move the water pipe vertical adjustment portion closer to or farther away from the inner tank support portion 310 , thereby adapting to water pipes 200 of different lengths.

[0082] In some embodiments of the present application, the water pipe vertical adjustment portion includes a threaded connection end 331 and a tapered positioning end 332. The threaded connection end 331 is threadedly connected to the threaded positioning hole 321. The threaded connection end 331 rotates relative to the threaded positioning hole 321 to achieve movement of the water pipe vertical adjustment portion relative to the inner tank support portion 310.

[0083] Specifically, the threaded connection end 331 may be in the form of a stud.

[0084] The tapered positioning end 332 is connected to the end of the threaded connection end 331 .

[0085] The cross-sectional area of ​​the tapered positioning end 332 gradually increases from a direction close to the threaded connection end 331 to a direction away from the threaded connection end 331 .

[0086] The reason why the conical positioning end 332 needs to be designed to gradually increase its cross-sectional area from close to the inner tank support portion 310 to away from the inner tank support portion 310 is that it is necessary to enable the water pipe vertical adjustment portion to adapt to water pipe fittings 200 of different diameters, thereby further expanding the scope of use and versatility of the water heater inner tank welding tooling.

[0087] Specifically, during the welding process, after the end of the water pipe fitting 200 is sleeved on the water pipe positioning portion 320, the operator holds the tapered positioning end 332 and inserts the threaded connection end 331 into the water pipe fitting 200, rotates the tapered positioning end 332 to drive the threaded connection end 331 to rotate, and screws the threaded connection end 331 into the threaded positioning hole 321. The threaded connection end 331 and the threaded positioning hole 321 move relative to each other until the circumferential outer wall of the tapered positioning end 332 abuts against the water pipe fitting 200, thereby achieving support and positioning of the water pipe fitting 200 away from the inner tank support portion, and the threaded connection end 331 and the threaded positioning hole 321 stop rotating.

[0088] In some embodiments of the present application, Figure 9 As shown, in order to facilitate the operator to rotate the water pipe vertical adjustment part by hand, a hand-held part 333 is provided on the end of the water pipe vertical adjustment part away from the inner tank support part 310. The operator rotates the hand-held part 333 to drive the conical positioning end 332 and the threaded connection end 331 to rotate.

[0089] Specifically, the handle portion 333 is connected to an end of the tapered positioning end 332 away from the threaded connection end 331 .

[0090] Specifically, the handle portion 333 may be an annular portion connected to the tapered positioning end 332 .

[0091] In some embodiments of the present application, in order to facilitate the convenient insertion of one end of the water pipe fitting 200 close to the inner tank support portion 310 onto the water pipe positioning portion 320 , a conical introduction portion 322 is formed on the circumference of the outer wall of the water pipe positioning portion 320 .

[0092] Specifically, the cross-sectional area of ​​the tapered inlet portion 322 gradually decreases from one end close to the liner support portion 310 to the end away from the liner support portion 310 , thereby facilitating the water pipe fitting 200 to be fitted onto the outside of the water pipe positioning portion 320 under the guidance of the tapered inlet portion 322 .

[0093] In some embodiments of the present application, to further position the water heater inner container 100 on the inner container support 310, a head-shaped portion 311 is connected to the inner container support 310. The head-shaped portion 311 is designed to be similar to the head of the water heater inner container. When the water heater inner container 100 is placed on the inner container support 310, the head-shaped portion 311 abuts against the inner container 100 from the inside.

[0094] Specifically, the arc direction of the head profiling portion 311 is downwardly disposed, and the frame unit 400 supports the head profiling portion 311 from below.

[0095] In some embodiments of the present application, since the inner tank support portion 310 connected to the water pipe positioning portion 320 is a cylindrical surface, during the process of welding the water pipe fitting 200 to the water heater inner tank 100, if the end of the water pipe fitting 200 is a plane, the end of the water pipe fitting 200 extending into the through hole cannot be in stable contact with the inner tank support portion 310. Therefore, an annular avoidance groove 312 is provided on the inner tank support portion 310 surrounding the water pipe positioning portion 320. After the end of the water pipe fitting 200 extends from the through hole, it is inserted into the annular avoidance groove 312. The bottom wall of the annular avoidance groove 312 is configured to fit tightly with the water pipe fitting 200, thereby achieving stable positioning of the water pipe fitting 200 and the water heater inner tank 100 during the welding process.

[0096] The water heater inner tank welding tool is provided to position the water heater inner tank 100 and the water pipe fitting 200 during the welding process, thereby improving the welding accuracy and welding quality; the inner tank support portion 310 is provided to support the water heater inner tank 100, and the water pipe positioning portion 320 is provided, which is provided on the inner tank support portion 310. When the water heater inner tank 100 is placed on the inner tank support portion 310, the through hole opened in the water heater inner tank 100 is sleeved on the water pipe positioning portion 320, so that the water heater inner tank 100 is accurately placed on the inner tank support portion 310, and the end of the water pipe fitting is sleeved on the water pipe positioning portion 320. The water pipe vertical adjustment portion is used to adjust the relative position of the end of the water pipe fitting 200 away from the inner tank support portion 310 relative to the end of the water pipe fitting close to the inner tank support portion 310, thereby ensuring the relative installation position of the water pipe fitting 200 and the water heater inner tank 100, thereby ensuring the welding accuracy between the two.

[0097] As the water storage device of the electric water heater, the water heater inner tank 100 must withstand high pressure for long periods of time, especially when high-temperature gas is generated within the inner tank. Typically, the water heater inner tank 100 and the water pipe fitting 200 are connected by welding to achieve a sealed connection between the water heater inner tank 100 and the water pipe fitting 200. To prevent leakage at the weld between the water heater inner tank 100 and the water pipe fitting 200 under high pressure, the weld surfaces of the water heater inner tank 100 and the water pipe fitting 200 must be accurately positioned.

[0098] In this embodiment, by designing the inner tank support portion 310 to be contoured with the water heater inner tank 100, and designing the head contouring portion 311 to be contoured with the water heater head, the two can achieve stable support and auxiliary positioning of the water heater inner tank 100; by providing a water pipe positioning portion 320 on the inner tank support portion, the through hole of the water heater inner tank 100 corresponds to the position of the water pipe positioning portion 320, and the through hole of the water heater inner tank 100 is sleeved outside the water pipe positioning portion 320, so as to realize the water pipe positioning unit 300. Positioning and installation between the water heater inner tank 100; put the lower end of the water pipe fitting 200 on the water pipe positioning part 320, and adjust the relative position of the upper end of the water pipe fitting 200 relative to the lower end by adjusting the water pipe vertical adjustment part, thereby adjusting the verticality of the water pipe fitting 200, that is, adjusting the relative position of the water pipe fitting 200 relative to the water heater inner tank, realizing accurate positioning between the water pipe fitting 200 and the water heater inner tank 100, thereby ensuring the welding quality between the two and reducing the risk of problems such as water leakage at the welding point.

[0099] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A water heater inner tank welding tool, which is used for welding the water heater inner tank to a water pipe fitting. The water heater inner tank is provided with a through hole for welding the water pipe fitting, and is characterized in that: include: A water pipe positioning unit, comprising an inner liner support portion, a water pipe positioning portion, and a water pipe vertical adjustment portion. The water pipe positioning portion is disposed on the inner liner support portion, the inner liner support portion being used to support the water heater inner liner. The water pipe positioning portion extends from the through hole, and the water pipe fitting is sleeved on the water pipe positioning portion. The water pipe vertical adjustment portion is used to adjust the relative position of the water pipe fitting away from the inner liner support portion and the end close to the inner liner support portion. The frame unit is used to support the water pipe positioning unit.

2. The water heater inner tank welding tool according to claim 1, characterized in that: The water pipe vertical adjustment portion can move relative to the water pipe positioning portion along the axial direction of the through hole.

3. The water heater inner tank welding tool according to claim 1, characterized in that: A threaded positioning hole is provided on the water pipe positioning portion, and the threaded positioning hole is coaxially arranged with the through hole; The water pipe vertical adjustment portion includes a threaded connection end and a tapered positioning end, wherein the threaded connection end is threadedly connected to the threaded positioning hole; The threaded connection end moves relative to the threaded positioning hole to the circumference of the tapered positioning end and abuts against an end of the water pipe away from the inner tank support portion.

4. The water heater inner tank welding tool according to claim 1, characterized in that: The end of the water heater inner tank is formed with a water heater inner tank sealing head; It also includes a head profiling unit, which is used to support the water heater tank head; The head profiling unit is connected to the water pipe positioning unit.

5. The water heater inner tank welding tool according to claim 1, characterized in that: The inner tank support portion is arranged in the same shape as the inner tank of the water heater, and the arc direction of the inner tank support portion is arranged downward; the frame unit supports the water pipe positioning unit from below.

6. The water heater inner tank welding tool according to claim 1, characterized in that: The water pipe positioning portion is arranged on the inner container supporting portion along a vertical direction.

7. The water heater inner tank welding tool according to claim 4, characterized in that: The arc direction of the head profiling unit is arranged downward; the frame unit supports the head profiling unit from below.

8. The water heater inner tank welding tool according to claim 1, characterized in that: A tapered introduction portion is formed along the circumference of the water pipe positioning portion, and the water pipe piece is sleeved outside the water pipe positioning portion along the tapered introduction portion.

9. The water heater inner tank welding tool according to claim 1, characterized in that: An annular avoidance groove is formed on the inner container support portion around the water pipe positioning portion, and the water pipe passes through the through hole and is inserted into the annular avoidance groove; And / or, a handle is formed at the end of the water pipe vertical adjustment portion away from the inner tank support portion, and the user drives the water pipe vertical adjustment portion to rotate relative to the water pipe positioning portion by rotating the handle.

10. The water heater inner tank welding tool according to claim 1, characterized in that: The frame unit includes a horizontal support portion and a vertical support portion. The vertical support portion is arranged on the horizontal support portion. The vertical support portion is used to support the water pipe positioning unit. The height of the vertical support portion is greater than the diameter of the water heater inner tank.

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