Pipe joint welding and positioning tool

Abstract

The utility model provides a pipe joint welding and positioning tool, which is used for assisting the welding between a pipe joint on an inner seal head in a liquid hydrogen bottle and an interlayer pipe in the liquid hydrogen bottle, and comprises a tool main body and a pipe fitting positioning part arranged on the tool main body, the tool main body is provided with a first positioning part and a second positioning part, and the tool main body is positioned on the inner sealing head through the first positioning part and the second positioning part; the pipe fitting positioning part comprises a positioning groove which is used for restraining the interlayer pipe and enabling the end of the interlayer pipe to be in butt joint with the pipe connector. According to the pipe joint welding positioning tool, the relative positions of the pipe joint and the interlayer pipe on the inner sealing head can be guaranteed, so that errors in the welding process of a liquid hydrogen bottle can be reduced, the production efficiency is improved, and the product quality of the liquid hydrogen bottle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen bottle manufacturing tooling, in particular to a pipe joint welding positioning tooling. Background Art

[0002] Hydrogen is a globally recognized clean energy source. Currently, my country's on-board hydrogen storage systems offer both high-pressure gaseous storage and cryogenic liquid storage. Liquid hydrogen is a high-energy, low-temperature liquid fuel. Liquid hydrogen storage systems offer the advantages of both high energy density and high hydrogen storage density. This means that within a tank of the same volume, liquid hydrogen can store more hydrogen, significantly increasing the vehicle's range. Liquid hydrogen cylinders for vehicles are a key component of this technology.

[0003] During the manufacturing process of on-board liquid hydrogen cylinders, the pipe joint needs to be passed through the through-hole on the inner head and then butt-welded to one end of the sandwich tube. If the pipe joint installed on the inner head is directly welded to the sandwich tube, the relative position of the pipe joint and the corresponding sandwich tube on the inner head cannot be guaranteed after welding. Therefore, it is urgent to design a pipe joint welding positioning tool. Summary of the Invention

[0004] In view of this, the utility model aims to propose a pipe joint welding positioning tool to ensure the relative position of the pipe joint and the sandwich tube and reduce the error in the liquid hydrogen bottle welding process.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A pipe joint welding positioning tool is used to assist in welding the pipe joint on the inner head of a liquid hydrogen bottle and the sandwich tube in the liquid hydrogen bottle. The pipe joint welding positioning tool includes a tool body and a pipe positioning portion provided on the tool body;

[0007] The tool body has a first positioning portion and a second positioning portion, and the tool body is positioned on the inner head through the first positioning portion and the second positioning portion;

[0008] The pipe fitting positioning portion includes a positioning groove, which is used to constrain the sandwich tube and enable the end of the sandwich tube to be butted against the pipe joint.

[0009] Furthermore, the tooling body includes a connecting rod, and the first positioning portion and the second positioning portion are arranged at both ends of the connecting rod; the first positioning portion can be positioned at the neck tube assembly of the inner head, and the second positioning portion can be positioned at the reference inner joint on the inner head.

[0010] Furthermore, the first positioning portion includes a positioning sleeve; the positioning sleeve is sleeved on the neck tube in the neck tube assembly, and the positioning sleeve can be threadedly connected to the connecting block in the neck tube.

[0011] Furthermore, a reinforcement piece is provided between the connecting rod and the positioning sleeve.

[0012] Furthermore, a gap is left between the inner wall of the positioning sleeve and the outer wall of the neck tube, and the gap is between 0.1 mm and 0.15 mm.

[0013] Furthermore, the second positioning portion includes a first positioning plate, a second positioning plate and a third positioning plate connected in pairs, and the first positioning plate, the second positioning plate and the third positioning plate are respectively used to position different end faces of the reference inner joint.

[0014] Furthermore, the positioning groove is provided corresponding to the bending portion of the sandwich tube, and the positioning groove can constrain the bending portion.

[0015] Furthermore, the pipe positioning parts are multiple and are arranged in a one-to-one correspondence with the self-pressurizing air inlet pipe, the air return pipe and the self-pressurizing air outlet pipe in the sandwich pipe.

[0016] Furthermore, the plurality of pipe positioning parts are connected to the tool body via a plurality of corresponding connecting arms. Furthermore, the pipe positioning part includes a support plate and an arc-shaped positioning plate provided on the support plate, wherein the positioning groove is defined between the support plate and the arc-shaped positioning plate.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The pipe joint welding positioning tool described in the utility model can constrain the sandwich tube in the positioning groove and enable the end of the sandwich tube to be butted together with the pipe joint through the tool body positioned on the inner head in the liquid hydrogen bottle, and the pipe positioning part provided on the tool body, thereby realizing the positioning of the sandwich tube and the pipe joint, thereby ensuring the relative position of the pipe joint and the sandwich tube on the inner head, thereby reducing the error of the liquid hydrogen bottle welding process, accelerating production efficiency, and improving the product quality of the liquid hydrogen bottle, and having a very good use effect.

[0019] In addition, the fixture body includes a connecting rod, with the first and second positioning portions located at either end of the connecting rod. This provides a simple structure and facilitates design and implementation. Furthermore, by positioning the first positioning portion on the neck tube assembly and the second positioning portion on the reference inner joint, the structure of the liquid hydrogen cylinder itself can be leveraged to better position the fixture body on the inner head, thereby improving the positioning accuracy of the pipe joint. The first positioning portion utilizes a positioning sleeve that fits over the neck tube and is threadedly connected to a connecting block within the neck tube, facilitating installation and positioning of the fixture body on the inner head and providing excellent positioning reliability.

[0020] Secondly, the reinforcement member helps to improve the connection strength between the connecting rod and the positioning sleeve, ensuring the reliability of the connection between the connecting rod and the positioning sleeve. The defined gap between the inner wall of the positioning sleeve and the outer wall of the neck tube not only facilitates the installation and removal of the positioning sleeve on the neck tube, but also effectively ensures the positioning accuracy of the positioning sleeve and thus the positioning accuracy of the tooling body.

[0021] Furthermore, the second positioning portion adopts a first positioning plate, a second positioning plate and a third positioning plate connected in pairs, and uses the first positioning plate, the second positioning plate and the third positioning plate to respectively position the different end faces of the reference inner joint, and its structure is simple and easy to operate and use. The use of the positioning groove in conjunction with the bending part of the sandwich tube can facilitate better positioning of the sandwich tube, ensure the accuracy of the relative position of the sandwich tube, and also facilitate design and implementation. In addition, there are multiple pipe positioning parts, which can facilitate the positioning of multiple sandwich tubes. The pipe positioning part is connected to the tool body through a connecting arm, which is beneficial to the overall weight reduction design of the pipe joint welding tool. The pipe positioning part includes a support plate and an arc-shaped positioning plate, and its structure is simple, which is conducive to the preparation of the positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic structural diagram of the pipe joint welding positioning tool according to an embodiment of the present utility model from a first perspective;

[0024] Figure 2 This is a structural schematic diagram of the pipe joint welding positioning tool according to an embodiment of the present utility model from a second perspective;

[0025] Figure 3 This is a structural diagram of the inner head and the sandwich tube in cooperation with each other according to an embodiment of the present utility model;

[0026] Figure 4This is a structural schematic diagram of the pipe joint welding positioning tooling in an application state according to an embodiment of the present utility model;

[0027] Description of reference numerals:

[0028] 1. Tool body; 2. Connecting arm; 3. Reinforcement plate; 4. Connecting bolt; 101. First positioning portion; 102. Second positioning portion; 103. Connecting rod; 21. Pipe fitting positioning portion; 201. Support plate; 202. Arc-shaped positioning plate; 203. Positioning groove; 1021. First positioning plate; 1022. Second positioning plate; 1023. Third positioning plate; 1001. Neck tube; 1002. Connecting block; 10021. Threaded hole;

[0029] 10. Inner head; 30. Self-pressurizing air inlet pipe; 40. Return air pipe; 50. Self-pressurizing air outlet pipe; 30a. First bending part; 40a. Second bending part; 50a. Third bending part; 31. First inner joint; 41. Second inner joint; 51. Third inner joint; 100. Reference inner joint. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0031] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0032] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] First, a liquid hydrogen cylinder, or liquid hydrogen cylinder, generally adopts a double-layer structure of an outer cylinder and an inner cylinder, with a vacuum interlayer formed between the inner and outer cylinders. The outer cylinder includes an outer cylinder body and outer heads connected to both ends of the outer cylinder body, while the inner cylinder includes an inner cylinder body and inner heads connected to both ends of the inner cylinder body. Secondly, in order to connect the interior of the inner cylinder with the exterior of the outer cylinder, it is necessary to install an interlayer pipe between the inner and outer heads. Pipe joints are welded to both ends of the interlayer pipe, and the pipe joints at both ends are welded to the inner and outer heads, respectively, thereby forming a closed channel between the inner and outer cylinders.

[0035] During the production of liquid hydrogen cylinders, the pipe joint needs to be inserted through the through-hole on the inner head and then butt-welded to one end of the sandwich tube. For ease of distinction, the pipe joint welded to the inner head is defined as the inner joint, and the pipe joint welded to the outer head is defined as the outer joint. During actual production, the inner and outer joints need to be butt-welded to both ends of the sandwich tube.

[0036] In the existing technology, the sandwich tube is mostly placed in the approximate position manually, and then the inner joint provided on the inner head is directly welded to the sandwich tube. After the inner joint and the sandwich tube are welded, the relative position of the inner joint and the corresponding sandwich tube on the inner head cannot be guaranteed, resulting in a low welding yield of the hydrogen storage bottle and low production efficiency.

[0037] Therefore, in order to solve the problem that the relative position of the pipe joint and the sandwich tube cannot be guaranteed in the prior art, this embodiment proposes a pipe joint welding positioning tool to assist in welding the pipe joint on the inner head of the liquid hydrogen bottle and the sandwich tube in the liquid hydrogen bottle. And in terms of the overall structure, such as Figure 1 and Figure 2 As shown, the pipe joint welding positioning tool of this embodiment includes a tool body 1 and a pipe positioning portion 21 provided on the tool body 1.

[0038] The tool body 1 is provided with a first positioning portion 101 and a second positioning portion 102, by which the tool body 1 is positioned on the inner head 10. The pipe positioning portion 21 includes a positioning groove 203, which is used to constrain the sandwich pipe and connect the end of the sandwich pipe with the pipe joint on the inner head.

[0039] At this time, as in the above structure, the tooling body 1 is positioned on the inner head 10 in the liquid hydrogen bottle, and the sandwich tube is positioned using the pipe positioning portion 21 provided on the tooling body 1, so that the pipe joint on the inner head 10, that is, the inner joint can be butted together with the end of the sandwich tube, thereby ensuring the relative position of the pipe joint and the sandwich tube on the inner head 10, thereby reducing the error in the welding process of the liquid hydrogen bottle, accelerating production efficiency, and improving the product quality of the liquid hydrogen bottle.

[0040] It should be noted that the pipe joint mentioned above, also known as the inner joint, can be inserted from the inner side of the inner head 10 into the through-hole of the inner head 10 and has an overhanging portion extending to the outside of the inner head 10. One end of the sandwich tube is butt-connected to the overhanging portion. In other words, the pipe joint welding positioning tool of this embodiment is used to position the sandwich tube to assist in welding between the inner joint and the end of the sandwich tube near the inner head 10.

[0041] Based on the above overall structure, in detail, as a preferred embodiment, continue to refer to Figure 1 and Figure 2 , and combined with Figure 3 and Figure 4 As shown, the tool body 1 of this embodiment includes a connecting rod 103, and a first positioning portion 101 and a second positioning portion 102 are respectively provided at both ends of the connecting rod 103. The first positioning portion 101 can be positioned at the neck tube assembly on the inner head 10, and the second positioning portion 102 can be positioned at the reference inner joint 100 on the inner head 10.

[0042] By arranging the first positioning portion 101 and the second positioning portion 102 at both ends of the connecting rod 103, the structure of the tool body 1 is relatively simple and easy to design and implement. The first positioning portion 101 is positioned on the neck tube assembly, and the second positioning portion 102 is positioned on the reference inner joint 100. In this way, by leveraging the structure of the liquid hydrogen bottle itself, the tool body 1 can be better positioned on the inner head 10, thereby improving the positioning accuracy of the pipe joint.

[0043] It is worth noting that, in the structure of the inner head 10, the neck tube assembly is disposed at the raised center of the inner head 10. The neck tube assembly comprises a neck tube 1001 and a connecting block 1002 welded to the inner end of the neck tube 1001. The connecting block 1002 is used to enhance the support of the neck tube 1001. The reference inner joint 100 is one of multiple inner joints welded to the inner head 10. In this embodiment, the inner joint between the liquid-filled pipeline in the sandwich tube and the inner head 10 is preferably used as the reference inner joint 100 for positioning.

[0044] As a preferred embodiment, the first positioning portion 101 of this embodiment includes a positioning sleeve, which is sleeved on the neck tube 1001 in the neck tube assembly and can be threadedly connected to the connecting block 1002 in the neck tube 1001. This arrangement not only facilitates the installation and positioning of the tool body 1 on the inner head 10, but also provides better positioning reliability.

[0045] In the specific implementation, as a preference, in this embodiment, a threaded hole 10021 is provided on the connecting block 1002, and correspondingly, a connecting bolt 4 is provided on the positioning sleeve. By screwing the connecting bolt 4 and the threaded hole 10021, the positioning sleeve is screwed to the connecting block 1002, so that the first positioning portion 101 can be better positioned on the neck tube assembly.

[0046] It can be understood that in addition to adopting the structural form of a positioning sleeve, the first positioning part 101 can also adopt a positioning shaft that cooperates with the neck tube assembly. One end of the positioning shaft is provided with an external thread, which is screwed to the threaded hole 10021 on the connecting block 1002 through the positioning shaft, so that the first positioning part 101 is positioned on the neck tube assembly. This is also possible.

[0047] In this embodiment, a gap is preferably provided between the inner wall of the positioning sleeve and the outer wall of the neck tube 1001, with the gap being between 0.1 mm and 0.15 mm. In this case, defining the gap between the inner wall of the positioning sleeve and the outer wall of the neck tube 1001 facilitates installation and removal of the positioning sleeve from the neck tube 1001, while also ensuring the positioning accuracy of the positioning sleeve and, consequently, the positioning accuracy of the tooling body. In specific implementations, this gap can be set to, for example, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, or 0.15 mm.

[0048] Still see Figure 1 and Figure 2 As shown, in this embodiment, a reinforcement member is provided between the connecting rod 103 and the positioning sleeve, and the reinforcement member is a triangular reinforcement plate 3. The provision of the reinforcement member is conducive to improving the connection strength between the connecting rod 103 and the positioning sleeve, ensuring the reliability of the connection between the connecting rod 103 and the positioning sleeve.

[0049] In this embodiment, the connecting rod 103 is preferably made of a stainless steel tube and includes a first rod body and a second rod body connected to each other, with the second positioning portion 102 disposed at the end of the second rod body. Furthermore, to ensure the structural strength of the connecting rod 103, a triangular reinforcement plate 3 is also disposed between the first rod body and the second rod body.

[0050] As a preferred embodiment, the second positioning portion 102 of this embodiment includes a first positioning plate 1021, a second positioning plate 1022, and a third positioning plate 1023 connected in pairs. The first positioning plate 1021, the second positioning plate 1022, and the third positioning plate 1023 are respectively used to position different end faces of the reference internal joint 100. In this case, the first positioning plate 1021, the second positioning plate 1022, and the third positioning plate 1023 are respectively used to position different end faces of the reference internal joint 100, which has the characteristics of simple structure and easy operation and use.

[0051] The tube positioning portion 21 of this embodiment, as a preferred embodiment, specifically comprises a support plate 201 and an arcuate positioning plate 202 fixedly attached to the support plate 201. A positioning groove 203 is defined between the support plate 201 and the arcuate positioning plate 202. The arcuate positioning plate 202 is designed to substantially conform to the contour of the bend of the sandwich tube, thereby effectively constraining the sandwich tube. During implementation, the tube body of the sandwich tube is supported on the support plate 201, and the bend of the sandwich tube is constrained in the positioning groove 203, thereby achieving proper positioning of the sandwich tube.

[0052] In this embodiment, there are multiple interlayer tubes connected to the inner head 10, each of which has at least one bending portion, and the symmetric center plane of each interlayer tube is parallel to the cross section of the inner head 10, and one of the bending portions can be constrained in the positioning groove 203. Figure 3 and Figure 4 As shown, the sandwich tube of this embodiment includes a self-pressurizing air inlet pipe 30, a return air pipe 40, and a self-pressurizing air outlet pipe 50. The self-pressurizing air inlet pipe 30 has a first bend 30a, the return air pipe 40 has a second bend 40a, and the self-pressurizing air outlet pipe 50 has a third bend 50a. The first bend 30a, the second bend 40a, and the third bend 50a are respectively close to the first inner joint 31, the second inner joint 41, and the third inner joint 51 on the inner head 10.

[0053] As a feasible implementation, the pipe fitting positioning portions 21 of this embodiment are provided in a plurality, one-to-one correspondence with the self-pressurized air inlet pipe 30, the air return pipe 40, and the self-pressurized air outlet pipe 50 in the sandwich pipe. Specifically, the plurality of positioning grooves 203 are provided in a one-to-one correspondence with the first bend 30a, the second bend 40a, and the third bend 50a. The first bend 30a, the second bend 40a, and the third bend 50a can be constrained in their respective positioning grooves 203. The corresponding positioning grooves and the bends are engaged to achieve positioning of each sandwich pipe, thereby ensuring the relative position of each sandwich pipe on the inner head 10.

[0054] Moreover, in terms of specific structure, as an example, a plurality of pipe positioning parts 21 are connected to the tool body 1 through a plurality of connecting arms 2 corresponding to each other. Figure 1 、 Figure 2 and Figure 4As shown, the tooling body 1 is provided with multiple connecting arms 2, each of which is provided with a pipe positioning portion 21, that is, each connecting arm 2 is provided with a positioning groove 203. To facilitate a better understanding of this solution, in this embodiment, the positioning grooves 203 are defined as a first positioning groove, a second positioning groove, and a third positioning groove. The first positioning groove is configured to securely engage with the first bend 30a at the end of the self-pressurized intake pipe 30, the second positioning groove is configured to securely engage with the second bend 40a at the end of the return pipe 40, and the third positioning groove is configured to securely engage with the third bend 50a at the end of the self-pressurized outlet pipe 50.

[0055] As a further preferred embodiment, in this embodiment, among the multiple connecting arms 2, some connecting arms 2 are arranged on the first positioning portion 101, and some connecting arms 2 are arranged on the connecting rod 103. That is, the two connecting arms 2 with the first positioning slot and the third positioning slot are connected to the positioning sleeve, and the connecting arm 2 with the second positioning slot is connected to the connecting rod 103. This arrangement makes the pipe joint welding positioning tooling structure relatively simple, facilitates the overall weight reduction design of the pipe joint welding tooling, and also helps to further improve the positioning accuracy of the sandwich tube and reduce positioning errors. It is worth noting that the arrangement position of the connecting arms 2 on the tooling body 1 can be arranged accordingly according to the actual required position of the sandwich tube.

[0056] Before using the pipe joint welding positioning tool of this embodiment, the reference inner joint 100 and the inner head 10 are pre-welded and positioned. After the positioning is completed, the pipe joint welding positioning tool of this embodiment is used. During specific use, the positioning sleeve is put on the neck tube 1001, and the tool body 1 is rotated so that the second positioning portion 102 is positioned on the reference inner joint 100. Then, the connecting bolt 4 is tightened into the threaded hole 10021 of the connecting block 1002, so that the tool body 1 is positioned on the inner head 10. Next, the bending part of each sandwich tube is constrained in the corresponding positioning groove 203, so that the multiple inner joints provided on the inner head 10 are respectively connected to the end of each sandwich tube in a one-to-one correspondence, and then the inner joints are welded to the corresponding sandwich tubes.

[0057] The pipe joint welding positioning tool of this embodiment can ensure the relative position of the pipe joint and the sandwich tube on the inner head 10, thereby reducing the error in the welding process of the liquid hydrogen bottle, speeding up production efficiency, improving the product quality of the liquid hydrogen bottle, and has good use effect and promotion significance.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe joint welding positioning tool, used to assist in welding the pipe joint on the inner head (10) in a liquid hydrogen bottle and the sandwich tube in the liquid hydrogen bottle, characterized in that: The pipe joint welding positioning tool comprises a tool body (1) and a pipe positioning portion (21) provided on the tool body (1); The tool body (1) has a first positioning portion (101) and a second positioning portion (102), and the tool body (1) is positioned on the inner head (10) via the first positioning portion (101) and the second positioning portion (102); The pipe fitting positioning portion (21) comprises a positioning groove (203), and the positioning groove is used to constrain the sandwich tube and enable the end of the sandwich tube to be butted together with the pipe joint.

2. The pipe joint welding positioning tool according to claim 1, characterized in that: The tool body (1) comprises a connecting rod (103), and the first positioning portion (101) and the second positioning portion (102) are respectively arranged at two ends of the connecting rod (103); The first positioning portion (101) can be positioned at the neck tube assembly of the inner head (10), and the second positioning portion (102) can be positioned at the reference inner joint (100) on the inner head (10).

3. The pipe joint welding positioning tool according to claim 2, characterized in that: The first positioning portion (101) comprises a positioning sleeve; The positioning sleeve is sleeved on the neck tube (1001) in the neck tube assembly, and the positioning sleeve can be threadedly connected to the connecting block (1002) in the neck tube (1001).

4. The pipe joint welding positioning tool according to claim 3, characterized in that: A reinforcement piece is provided between the connecting rod (103) and the positioning sleeve.

5. The pipe joint welding positioning tool according to claim 3, characterized in that: A gap is left between the inner wall of the positioning sleeve and the outer wall of the neck tube (1001), and the gap is between 0.1 mm and 0.15 mm.

6. The pipe joint welding positioning tool according to claim 2, characterized in that: The second positioning portion (102) comprises a first positioning plate (1021), a second positioning plate (1022) and a third positioning plate (1023) connected in pairs, wherein the first positioning plate (1021), the second positioning plate (1022) and the third positioning plate (1023) are respectively used to position different end faces of the reference inner joint (100).

7. The pipe joint welding positioning tool according to claim 1, characterized in that: The positioning groove (203) is arranged corresponding to the bending portion of the sandwich tube, and the positioning groove (203) can constrain the bending portion.

8. The pipe joint welding positioning tool according to claim 7, characterized in that: The pipe positioning parts (21) are multiple and are arranged in a one-to-one correspondence with the self-pressurizing air inlet pipe (30), the air return pipe (40), and the self-pressurizing air outlet pipe (50) in the sandwich pipe.

9. The pipe joint welding positioning tool according to claim 8, characterized in that: The plurality of pipe positioning portions (21) are connected to the tooling body (1) via a plurality of corresponding connecting arms (2).

10. The pipe joint welding positioning tool according to any one of claims 1 to 9, characterized in that: The pipe positioning portion (21) comprises a support plate (201) and an arc-shaped positioning plate (202) provided on the support plate (201), and the positioning groove (203) is defined between the support plate (201) and the arc-shaped positioning plate (202).

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