Welding positioning tool and stop valve welding device containing the same

Abstract

The present application is about a welding positioning tool and a stop valve welding device including the same. The welding positioning tool comprises: an angle adjustment disk and a positioning column; the angle adjustment disk is provided with N first positioning holes, N being an even number; the N first positioning holes are distributed on a first circular track with the center point of the angle adjustment disk as the center of the circle and the set hole spacing as the diameter, forming N / 2 groups of welding positioning, and the two first positioning holes of any group of welding positioning are distributed at both ends of the diameter of the first circular track; the hole spacing is set to be the distance between the mounting holes for assembly on the device to be welded; when the device to be welded is welded, a positioning column is fixed between the mounting hole and the two first positioning holes of any group of welding positioning, so that the welding angle of the device to be welded is fixed. The solution provided by the present application can adapt to various welding angle requirements, without the need to frequently replace the positioning tooling, saving tooling costs, reducing the difficulty of tooling management, improving production efficiency, and improving welding quality and efficiency.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to a welding positioning tool and a stop valve welding device comprising the same. Background Art

[0002] The stop valve is a valve device used to connect the air conditioner outdoor unit with the valve connecting pipe. Its structure is fixed but there are many specifications. The stop valve and the valve connecting pipe are welded together. During welding, the stop valve core should be prevented from being deformed by high temperature, so it should be immersed in water for cooling protection. Due to the differences in the pipeline structure of the outdoor units of different models, there are many welding angles between the valve connecting pipe and the stop valve, which will cause the stop valve specifications to change when the model is replaced, which will cause the welding angle between the stop valve and the valve connecting pipe to change. During the replacement process, the welding angle is prone to deviation, and the positioning tool is required to ensure the accuracy of the welding angle. Frequent replacement of the positioning tool is time-consuming and labor-intensive, and the end of the positioning tool and the stop valve for welding is immersed in the water tank at the same time. The positioning tool is difficult to replace, which reduces production efficiency.

[0003] In the prior art, the patent with publication number CN104816121B (a stop valve welding device) proposes a stop valve welding device including a frame and a rotating disk arranged on the upper part of the frame, the rotating disk is connected to a stepping motor arranged in the middle of the frame, a welding plate is arranged on the rotating disk, and a fixing device and a positioning device are arranged on the welding plate. The fixing device is composed of a base and a support; the positioning device is composed of a base fixing plate, a rotating shaft, a rotating plate, an angle ruler, a frame plate and a moving column.

[0004] The above prior art has the following disadvantages:

[0005] This solution requires the use of an angle ruler to perform measurements one by one, and the stop valve needs to be immersed in the water of a welding tank for welding. Measuring the angle in water is cumbersome and prone to errors, so it is necessary to develop a welding positioning tool that can determine the welding angle without angle measurement. Summary of the invention

[0006] In order to overcome the problems existing in the related technology, the present application provides a welding positioning tool, which can adapt to various welding angle requirements, does not need to frequently replace the positioning tool, saves tooling costs, reduces the difficulty of tooling management, improves production efficiency, and improves welding quality and efficiency.

[0007] The first aspect of the present application provides a welding positioning tool, comprising:

[0008] Angle adjustment plate 1 and positioning column 2;

[0009] The angle adjustment plate 1 is provided with N first positioning holes 11, where N is an even number;

[0010] N first positioning holes 11 are distributed on a first circular track with the center point of the angle adjustment plate 1 as the center and the set hole pitch as the diameter, forming N / 2 groups of welding positioning, and the two first positioning holes 11 of any group of welding positioning are distributed at both ends of the diameter of the first circular track; the set hole pitch is the distance between the mounting holes 31 for assembly on the device 3 to be welded;

[0011] When the device 3 to be welded is welded, a positioning column 2 is fixed between the mounting hole 31 and any group of two first positioning holes 11 for welding positioning, so that the welding angle of the device 3 to be welded is fixed.

[0012] In one embodiment, the welding positioning tool further includes:

[0013] Positioning plate 4;

[0014] The angle adjustment plate 1 is provided with M arc positioning notches 12, where M is greater than 2;

[0015] The positioning plate 4 is provided with M second positioning holes 41, and the M second positioning holes 41 are distributed on a second circular track, the center of the second positioning hole 41 and the center of the arc positioning notch 12 are located on the same vertical line, and the radius of the arc positioning notch 12 is consistent with the inner diameter of the second positioning hole 41;

[0016] A rotation adjustment shaft 5 is provided between the center of the second circular trajectory and the center point of the disk, so that the angle adjustment disk 1 is fixedly connected to the positioning plate 4, and when the device 3 to be welded is welded, the angle adjustment disk 1 can rotate around the rotation adjustment shaft 5 to adjust the welding angle.

[0017] In one embodiment, the welding positioning tool further includes:

[0018] Positioning bolt 6;

[0019] The outer diameter of the positioning bolt 6 is consistent with the inner diameter of the second positioning hole 41, so that the positioning bolt 6 can be loosely matched with the second positioning hole 41. When the angle adjustment disk 1 rotates around the rotating adjustment shaft 5 to complete the adjustment of the welding angle, the positioning bolt 6 is fixed in the second positioning hole 41 and the arc positioning notch 12.

[0020] In one embodiment, the angle adjustment disk 1 is a circular adjustment disk;

[0021] M arc positioning notches 12 are arranged on the circumferential edge of the circular adjustment disk.

[0022] In one embodiment, the angle adjustment disk 1 is a regular polygon adjustment disk, and the number of edges of the regular polygon adjustment disk is M;

[0023] The M arc positioning notches 12 are arranged at the vertex positions of the regular polygonal adjustment disk.

[0024] In one embodiment, N first positioning holes 11 are evenly distributed on the first circular track in the circumferential direction, and N is an even multiple of 360.

[0025] In one embodiment, the M second positioning holes 41 are evenly distributed on the second circumferential track;

[0026] M arc positioning notches 12 are evenly arranged on the circumferential edge of the circular adjustment disk, and M is a divisor of 360.

[0027] In one embodiment, a first internal thread is provided in the first positioning hole 11;

[0028] A second internal thread is provided in the mounting hole 31;

[0029] Both ends of the positioning column 2 are provided with a first external thread, and the first external thread matches the first internal thread and the second internal thread.

[0030] In one embodiment, a third internal thread is provided in the second positioning hole 41;

[0031] One end of the positioning bolt 6 is provided with a second external thread, and the second external thread matches the third internal thread.

[0032] A second aspect of the present application provides a stop valve welding device, comprising:

[0033] Welding bracket 7, welding water tank 8 and welding positioning tooling as described in any of the above items;

[0034] The welding positioning tool is arranged in the welding water tank 8;

[0035] The welding bracket 7 includes a first supporting cross bar 71 and a second supporting cross bar 72;

[0036] A connecting pipe positioning groove 711 is provided on the first supporting cross bar 71. The connecting pipe positioning groove 711 is used to fix the connecting pipe 9. The connecting pipe 9 is a pipeline component to be welded with the component to be welded 3.

[0037] The welding water tank 8 is fixed on the second supporting cross bar 72 .

[0038] The technical solution provided by this application may have the following beneficial effects:

[0039] By arranging N first positioning holes on the angle adjustment disk, the N first positioning holes are distributed on a first circular trajectory with the disk center point of the angle adjustment disk as the center and the set hole spacing as the diameter, and N is an even number, N / 2 groups of welding positioning can be formed, and the two first positioning holes of any group of welding positioning are distributed at both ends of the diameter of the first circular trajectory, that is, the distance between the two first positioning holes of any group of welding positioning is the set hole spacing, and the set hole spacing is the distance between the mounting holes for assembly on the device to be welded, so that when the device to be welded is welded, the positioning column can be fixed between the mounting hole and the two first positioning holes of any group of welding positioning, that is, the welding angle of the device to be welded can be fixed, and when the positioning column is fixed between the mounting hole and the two first positioning holes of different groups of welding positioning, the welding angle of the device to be welded can be changed, so that it can adapt to various welding angle requirements, there is no need to frequently replace positioning tooling, saving tooling costs, reducing the difficulty of tooling management, improving production efficiency, and avoiding the problem of welding angle error caused by the need to re-measure the welding angle, thereby improving welding quality and efficiency.

[0040] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0042] Figure 1 It is a structural schematic diagram of an angle adjustment plate of a welding positioning tool shown in an embodiment of the present application;

[0043] Figure 2 It is a structural schematic diagram of a positioning plate of a welding positioning tool shown in an embodiment of the present application;

[0044] Figure 3 It is a structural schematic diagram of the welding positioning tool shown in the embodiment of the present application, in which the angle adjustment plate is connected to the positioning plate;

[0045] Figure 4 It is a schematic diagram of a top view of the structure when a device to be welded is positioned on a welding positioning tool as shown in an embodiment of the present application;

[0046] Figure 5 It is a schematic structural diagram of a stop valve welding device shown in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0048] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0049] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0050] Embodiment 1

[0051] Due to the differences in the external machine pipeline structure of different models, there are multiple welding angles between the valve connecting pipe and the stop valve, which will cause the stop valve specifications to change when the model is changed, which will cause the welding angle between the stop valve and the valve connecting pipe to change. During the replacement process, it is easy to produce deviations in the welding angle, and a positioning tool is required to ensure the accuracy of the welding angle. Frequent replacement of the positioning tool is time-consuming and labor-intensive, and the end of the positioning tool and the stop valve for welding is immersed in the water tank at the same time, which makes it difficult to replace the positioning tool, reducing production efficiency. The existing technology requires the use of an angle ruler to measure one by one, and the stop valve needs to be immersed in the water of the welding tank for welding. Measuring the angle in water is cumbersome and prone to errors. Therefore, it is necessary to develop a welding positioning tool that can determine the welding angle without angle measurement.

[0052] In response to the above problems, an embodiment of the present application provides a welding positioning tool that can adapt to various welding angle requirements, eliminates the need for frequent replacement of positioning tooling, saves tooling costs, reduces the difficulty of tooling management, improves production efficiency, and improves welding quality and efficiency.

[0053] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0054] See also Figure 1 and Figure 4 , the first embodiment of the welding positioning tool shown in the embodiment of the present application includes:

[0055] Angle adjustment plate 1 and positioning column 2, wherein Figure 1 As shown, the angle adjustment disk 1 is provided with N first positioning holes 11, N is an even number, and the N first positioning holes 11 are distributed on a first circular track with the disk center point of the angle adjustment disk 1 as the center and a set hole spacing as the diameter, forming N / 2 groups of welding positioning, and the two first positioning holes 11 of any group of welding positioning are distributed at both ends of the diameter of the first circular track, and the set hole spacing is the distance between the mounting holes 31 used for assembly on the device 3 to be welded, that is, the distance between the two first positioning holes of any group of welding positioning is the set hole spacing, so that when the device 3 to be welded is welded, a positioning column 2 is fixed between the mounting hole 31 and the two first positioning holes 11 of any group of welding positioning, so that the welding angle of the device 3 to be welded is fixed.

[0056] It can be understood that, with the center point of the disk as the rotation center, the rotation angles between each group of welding positions can be set to be consistent or inconsistent. The rotation angle can be set according to the actual application needs. If it is set to be consistent, the rotation angle between adjacent welding positions can be set to the common divisor of the commonly used welding angles, which can be 15° or 10° for example, without making a unique limitation. Assuming that the rotation angle between adjacent welding positions is set to 15°, it can meet the welding angles of 15°, 30°, 45° and 60°, etc.; if it is set to be inconsistent, several different commonly used welding angles can be set, which can be 15°, 30°, 45° and 60°, etc. for example, without making a unique limitation. It can also be understood that a group of welding positions in the horizontal direction can be used as the welding angle adjustment reference line of 0°, or other groups of welding positions can be used as the welding angle adjustment reference line of 0°, which needs to be determined according to the actual application situation, and is not uniquely limited here. Therefore, the purpose of changing the welding angle can be achieved by changing the welding position of the positioning column 2.

[0057] In the embodiment of the present application, the device 3 to be welded includes but is not limited to a stop valve, and may also be other devices with welding angle requirements. The mounting holes 31 originally used for assembly on the device 3 to be welded can be used to achieve the positioning of the welding angle, thereby ensuring the accuracy of the welding angle.

[0058] The following beneficial effects can be seen from the above embodiment 1:

[0059] By arranging N first positioning holes on the angle adjustment disk, the N first positioning holes are distributed on a first circular trajectory with the disk center point of the angle adjustment disk as the center and the set hole spacing as the diameter, and N is an even number, N / 2 groups of welding positioning can be formed, and the two first positioning holes of any group of welding positioning are distributed at both ends of the diameter of the first circular trajectory, that is, the distance between the two first positioning holes of any group of welding positioning is the set hole spacing, and the set hole spacing is the distance between the mounting holes for assembly on the device to be welded, so that when the device to be welded is welded, the positioning column can be fixed between the mounting hole and the two first positioning holes of any group of welding positioning, that is, the welding angle of the device to be welded can be fixed, and when the positioning column is fixed between the mounting hole and the two first positioning holes of different groups of welding positioning, the welding angle of the device to be welded can be changed, so that it can adapt to various welding angle requirements, there is no need to frequently replace positioning tooling, saving tooling costs, reducing the difficulty of tooling management, improving production efficiency, and avoiding the problem of welding angle error caused by the need to re-measure the welding angle, thereby improving welding quality and efficiency.

[0060] Embodiment 2

[0061] For ease of understanding, an embodiment of a welding positioning tool is provided below for illustration. In actual applications, a positioning plate with a second positioning hole will be provided to cooperate with an angle adjustment disk to adjust and position the welding angle, further satisfying more welding angles, so that one welding positioning tool can meet most welding angle requirements, reduce the frequency of replacing the positioning tool, reduce the difficulty of storage and management of the positioning tool, and improve the adjustment accuracy of the welding angle.

[0062] See also Figures 1 to 4 , the second embodiment of the welding positioning tool shown in the embodiment of the present application includes:

[0063] The angle adjustment plate 1 is provided with M arc positioning notches 12, where M is greater than 2. The welding positioning tool also includes a positioning plate 4, on which M second positioning holes 41 are provided, and the M second positioning holes 41 are distributed on a second circular trajectory, and the center of the second positioning hole 41 and the center of the arc positioning notch 12 are located on the same vertical line, and the radius of the arc positioning notch 12 is consistent with the inner diameter of the second positioning hole 41. A rotation adjustment shaft 5 is provided between the center of the second circular trajectory and the center point of the disk, so that the angle adjustment disk 1 is fixedly connected to the positioning plate 4, and the angle adjustment disk 1 will not be positionally offset on the positioning plate 4, and when the device 3 to be welded is being welded, the angle adjustment disk 1 can rotate around the rotation adjustment shaft 5 to adjust the welding angle. It can be understood that when the current arc positioning notch 12 rotates from the position of the current second positioning hole 41 to the position of the next second positioning hole 41, even if the positioning column 2 is fixed at the current welding position, the welding angle can be adjusted, thereby achieving the purpose of adjusting the welding angle by cooperating with the angle adjustment disk with N / 2 sets of welding positions. Assuming that a set of welding positions in the horizontal direction is used as the welding angle adjustment reference line of 0°, the positioning column 2 changes the rotation angle corresponding to the two sets of welding positions in the counterclockwise direction, and then the angle adjustment disk 1 is rotated clockwise to change the current arc positioning notch 12 from the position of the current second positioning hole 41 to the rotation angle corresponding to the position of the next second positioning hole 41. If the rotation angle is 60 degrees and the rotation angle is 45 degrees at this time, the actual welding angle of the device 3 to be welded is 15° deflected counterclockwise. It can be explained that if the change direction of the welding position is consistent with the rotation direction of the angle adjustment disk 1, the corresponding rotation angle is added to the rotation angle; if the change direction of the welding position is opposite to the rotation direction of the angle adjustment disk 1, the corresponding rotation angle is subtracted from the rotation angle.

[0064] The above-mentioned method for adjusting the welding angle is only exemplary and is only for a better understanding of the technical solution of the present application. The angle description therein is also only exemplary. The specific adjustment angle needs to be determined according to the actual application situation and is not the only limitation here.

[0065] In the embodiment of the present application, the angle adjustment disk 1 can be a circular adjustment disk or a regular polygonal adjustment disk, which needs to be selected according to the actual application situation and is not limited to a single one.

[0066] When the angle adjustment disk 1 is a circular adjustment disk, M arc positioning notches 12 are arranged on the circumferential edge of the circular adjustment disk. Preferably, the M arc positioning notches 12 are evenly arranged on the circumferential edge of the circular adjustment disk, and the M second positioning holes 41 are evenly distributed circumferentially on the second circumferential trajectory, and M is a divisor of 360. It can be understood that at this time, the rotation angle of adjacent arc positioning notches 12 is consistent with the rotation angle of adjacent second positioning holes 41, that is, the quotient obtained by dividing 360° by M. Specifically, M can be set to 12. In actual applications, it can also be set to other values, which depends on the actual application situation and is not the only limitation here.

[0067] When the angle adjustment disk 1 is a regular polygon adjustment disk, the number of side lines of the angle adjustment disk 1 is M, and the M arc positioning notches 12 are arranged at the vertex positions of the regular polygon adjustment disk.

[0068] In the embodiment of the present application, N first positioning holes 11 are evenly distributed on the first circular trajectory, and N is an even divisor of 360, an even divisor is a divisor that can be divided by 2. For example, N can be set to 8, that is, the rotation angle between each group of welding positioning is 45°. In actual applications, the value of N is diverse and needs to be determined based on the actual application situation. It is not uniquely limited here.

[0069] The following beneficial effects can be seen from the above-mentioned embodiment 2:

[0070] By providing a positioning plate with a second positioning hole and cooperating with the angle adjustment disk to adjust and position the welding angle, more welding angles can be further satisfied, so that one welding positioning tool can meet most welding angle requirements, reduce the frequency of replacing the positioning tool, reduce the difficulty of storage and management of the positioning tool, and improve the adjustment accuracy of the welding angle.

[0071] Embodiment 3

[0072] For ease of understanding, an embodiment of a welding positioning tool is provided below for illustration. In actual applications, the fixing method between the positioning column and the first positioning hole and the mounting hole will be set to a threaded fixing method, and positioning bolts will be provided to fix the angle adjustment plate to prevent the angle adjustment plate from deflecting during the welding process and causing the welding angle to deviate, thereby improving the reliability of the welding positioning tool.

[0073] See also Figure 4 , the third embodiment of the welding positioning tool shown in the embodiment of the present application includes:

[0074] A first internal thread is provided in the first positioning hole 11, a second internal thread is provided in the mounting hole 31, and first external threads are provided at both ends of the positioning column 2. The first external thread matches the first internal thread and the second internal thread, so that the two ends of the positioning column 2 can be threadedly fixed to the first positioning hole 11 and the mounting hole 31 respectively.

[0075] The welding positioning tool also includes a positioning bolt 6, the outer diameter of which is consistent with the inner diameter of the second positioning hole 41, so that the positioning bolt 6 can be loosely matched with the second positioning hole 41. When the angle adjustment disk 1 rotates with the rotating adjustment shaft 5 as the axis to complete the adjustment of the welding angle, the positioning bolt 6 is fixed in the second positioning hole 41 and the arc positioning notch 12. Furthermore, a third internal thread is provided in the second positioning hole 41, and a second external thread is provided at one end of the positioning bolt 6. The second external thread matches the third internal thread, so that the positioning bolt 6 can be threadedly fixed with the second positioning hole 41, thereby being stuck in the notch range of the arc positioning notch 12, preventing the angle adjustment disk 1 from continuing to rotate after completing the welding angle adjustment, and preventing the angle adjustment disk 1 from deflecting during the welding process, which causes the welding angle to deviate.

[0076] The following beneficial effects can be seen from the above embodiment 3:

[0077] By setting the fixing method between the positioning column and the first positioning hole and the mounting hole to a threaded fixing method, and providing positioning bolts to fix the angle adjustment plate, it is possible to effectively prevent the welding angle from deviating and improve the reliability of the welding positioning tooling.

[0078] Embodiment 4

[0079] Corresponding to the above-mentioned embodiment of the welding positioning tool, the present application also provides a stop valve welding device and corresponding embodiments.

[0080] Figure 5 It is a schematic structural diagram of a stop valve welding device shown in an embodiment of the present application.

[0081] See also Figure 5 The stop valve welding device shown in the embodiment of the present application includes:

[0082] The welding bracket 7, the welding trough 8 and the welding positioning tooling as described in any of the above embodiments, the welding positioning tooling is arranged in the welding trough 8. In practical applications, the positioning plate 4 of the welding positioning tooling can be fixed on the bottom of the welding trough 8, or other fixing methods can be used, which are not limited to the only one. Thus, the device 3 to be welded can be immersed in the water of the welding trough 8 for welding.

[0083] The welding bracket 7 includes a first supporting cross bar 71 and a second supporting cross bar 72. The first supporting cross bar 71 is provided with a connecting pipe positioning groove 711. The connecting pipe positioning groove 711 is used to fix the connecting pipe 9. The connecting pipe 9 is a pipeline device welded to the device 3 to be welded. It can be understood that after the position and angle of the connecting pipe 9 are fixed, the welding angle of the device 3 to be welded can be fixed more accurately, thereby effectively improving the welding quality.

[0084] like Figure 5 As shown, the welding water tank 8 is fixed on the second supporting cross bar 72 , and the second supporting cross bar 72 is located below the first supporting cross bar 71 , so as to better adapt to the extension direction of the connecting pipe 9 .

[0085] Regarding the welding positioning tool in the above embodiment, the specific methods of each part thereof have been described in detail in the embodiment of the welding positioning tool, and will not be elaborated again here.

[0086] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For the part that is not described in detail in a certain embodiment, refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the description are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0087] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A welding positioning tool, characterized in that: include: An angle adjustment plate (1) and a positioning column (2); The angle adjustment disk (1) is provided with N first positioning holes (11), wherein N is an even number; The N first positioning holes (11) are distributed on a first circular track with the center point of the angle adjustment disk (1) as the center and the set hole spacing as the diameter, forming N / 2 groups of welding positions, and the two first positioning holes (11) of any group of welding positions are distributed at both ends of the diameter of the first circular track; the set hole spacing is the distance between the mounting holes (31) for assembly on the device to be welded (3); When the device to be welded (3) is welded, the positioning column (2) is fixed between the mounting hole (31) and any group of two first positioning holes (11) for welding positioning, so that the welding angle of the device to be welded (3) is fixed; Taking the center point of the disk as the rotation center, the rotation angles between the welding positions of each group are inconsistent; several different commonly used welding angles are set, including 15°, 30°, 45° and 60°; If the direction of the welding position change is consistent with the rotation direction of the angle adjustment disk (1), the corresponding rotation angle is added to the rotation angle; if the direction of the welding position change is opposite to the rotation direction of the angle adjustment disk (1), the corresponding rotation angle is subtracted from the rotation angle; The welding positioning tooling also includes: Positioning plate (4); The angle adjustment disk (1) is provided with M circular arc positioning notches (12), wherein M is greater than 2; The positioning plate (4) is provided with M second positioning holes (41), the M second positioning holes (41) are distributed on a second circular track, the center of the second positioning hole (41) and the center of the circular arc positioning notch (12) are located on the same vertical line, and the radius of the circular arc positioning notch (12) is consistent with the inner diameter of the second positioning hole (41); A rotation adjustment shaft (5) is provided between the center of the second circular track and the center point of the disc, so that the angle adjustment disc (1) is fixedly connected to the positioning plate (4), and when the device to be welded (3) is welded, the angle adjustment disc (1) can rotate around the rotation adjustment shaft (5) to adjust the welding angle; The angle adjustment disk (1) is a circular adjustment disk; The M arc positioning notches (12) are arranged on the circumferential edge of the circular adjustment disk; When the arc positioning notch (12) rotates from the position of the current second positioning hole (41) to the position of the next second positioning hole (41), if the positioning column (2) remains fixed at the current welding position, the welding angle can be adjusted.

2. The welding positioning tool according to claim 1, characterized in that: Also includes: Positioning bolt (6); The outer diameter of the positioning bolt (6) is consistent with the inner diameter of the second positioning hole (41), so that the positioning bolt (6) can be loosely matched with the second positioning hole (41); when the angle adjustment disk (1) rotates around the rotating adjustment shaft (5) to complete the adjustment of the welding angle, the positioning bolt (6) is fixed in the second positioning hole (41) and the circular arc positioning notch (12).

3. The welding positioning tool according to claim 1, characterized in that: The angle adjustment disk (1) is a regular polygon adjustment disk, and the number of side lines of the regular polygon adjustment disk is M; The M arc positioning notches (12) are arranged at the vertex positions of the regular polygonal adjustment disk.

4. The welding positioning tool according to claim 1, characterized in that: The N first positioning holes (11) are evenly distributed on the first circular track in the circumferential direction, and N is an even multiple of 360.

5. The welding positioning tool according to claim 1, characterized in that: The M second positioning holes (41) are evenly distributed on the second circumferential track; The M circular arc positioning notches (12) are evenly arranged on the circumferential edge of the circular adjustment disk, and M is a divisor of 360.

6. The welding positioning tool according to claim 1, characterized in that: The first positioning hole (11) is provided with a first internal thread; The mounting hole (31) is provided with a second internal thread; Both ends of the positioning column (2) are provided with a first external thread, and the first external thread matches the first internal thread and the second internal thread.

7. The welding positioning tool according to claim 2, characterized in that: A third internal thread is provided in the second positioning hole (41); One end of the positioning bolt (6) is provided with a second external thread, and the second external thread matches the third internal thread.

8. A stop valve welding device, characterized in that: include: A welding bracket (7), a welding trough (8), and a welding positioning tool as claimed in any one of claims 1 to 7; The welding positioning tool is arranged in the welding water tank (8); The welding bracket (7) comprises a first supporting cross bar (71) and a second supporting cross bar (72); The first supporting cross bar (71) is provided with a connecting pipe positioning groove (711), and the connecting pipe positioning groove (711) is used to fix the connecting pipe (9), and the connecting pipe (9) is a pipeline component welded to the component to be welded (3); The welding water trough (8) is fixed on the second supporting cross bar (72).

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