Welding auxiliary positioning tool

Abstract

The utility model relates to the technical field of air conditioner tools, in particular to a welding auxiliary positioning tool which is used for assisting installation of an air conditioner system, the air conditioner system comprises a shell, an electromagnetic valve and a connecting pipe, and a valve body of the electromagnetic valve is welded to the connecting pipe; a first installation position and a second installation position are arranged in the shell and used for installing a coil of the electromagnetic valve and a welding auxiliary positioning tool respectively. The welding auxiliary positioning tool comprises a bottom plate and a positioning assembly, the positioning assembly is arranged on the bottom plate and comprises n supports, n is larger than or equal to 1, limiting grooves are formed in the ends, away from the bottom plate, of the supports so that connecting pipes can penetrate through the limiting grooves, and the supports limit movement of the connecting pipes through the limiting grooves. According to the welding auxiliary positioning tool, the connecting pipe welded to the electromagnetic valve body can be positioned, the connecting pipe can be accurately installed at the pre-installation position of the connecting pipe in the shell, and therefore the positioning / assembling error of the connecting pipe is reduced, and then the positioning / assembling error of the electromagnetic valve body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner tooling, in particular to a welding auxiliary positioning tooling. Background Art

[0002] In a rail transit air conditioning system, a solenoid valve is a key component, an automatic element for regulating the refrigerant flow rate, and can control the on / off of the refrigerant. The solenoid valve consists of two parts, a coil and a valve body. The coil is installed on the housing of the air conditioning system, and the valve body is directly welded to the pipeline assembly of the air conditioning system.

[0003] In the process of implementing this application, the inventor found that there are at least the following problems in the prior art:

[0004] Due to the positioning / assembly error in the welding of the pipeline assembly in the air conditioning system, after the welding of the valve body is completed, there will be a large deviation between the actual position and the theoretical position of the valve body, which will lead to difficulties in assembling the coil and the valve body in the later stage or inability to assemble, affecting the processing efficiency and product quality of the air conditioning system. Summary of the Utility Model

[0005] This application proposes a welding auxiliary positioning tooling, aiming to reduce the positioning / assembly error of the solenoid valve body in the air conditioning system.

[0006] In a first aspect, an embodiment of this application provides a welding auxiliary positioning tooling for assisting in the installation of an air conditioning system. The air conditioning system includes a housing, a solenoid valve, and a connecting pipe. The valve body of the solenoid valve is welded to the connecting pipe. A first installation position and a second installation position are provided in the housing for installing the coil of the solenoid valve and the welding auxiliary positioning tooling respectively; the welding auxiliary positioning tooling includes:

[0007] A bottom plate;

[0008] A positioning assembly is arranged on the bottom plate. The positioning assembly includes n brackets, where n≥1. A limiting groove is provided at one end of the bracket away from the bottom plate for the connecting pipe to pass through, and the movement of the connecting pipe is restricted by the limiting groove of the bracket.

[0009] In some embodiments, n≥2. At least part of the n brackets are first brackets, and the limiting groove of the first bracket is a first limiting groove, which is recessed from one end of the first bracket facing away from the bottom plate; or,

[0010] The first bracket includes a first support rod and a bent portion. One end of the first support rod is fixed to the bottom plate, and the other end is connected to the bent portion. The bent portion includes a first extension section and a second extension section. The first extension section extends from the side wall of the first support rod away from the first support rod, and the second extension section extends from the end of the first extension section away from the first support rod and away from the bottom plate. The first limiting groove is located between the second extension section and the side wall of the first bracket.

[0011] In some embodiments, some of the n brackets are second brackets. The limiting groove of the second bracket is a second limiting groove. The second bracket includes a second support rod and a locking plate that are detachably and fixedly connected. One end of the second support plate is fixed to the bottom plate, and a second limiting groove is recessed in the side wall of the other end. The locking plate covers the notch of the second limiting groove.

[0012] In some embodiments, the second bracket is provided with a plurality of second limiting grooves, and the plurality of second limiting grooves are arranged in sequence along the height direction of the second support rod. The second limiting grooves are configured to be arranged in one-to-one correspondence with the connecting pipes.

[0013] In some embodiments, the connecting pipe includes a first connecting section and a second connecting section. The first limiting groove is used to limit the movement of the first connecting section, and the second limiting groove is used to limit the movement of the second connecting section.

[0014] In some embodiments, the second bracket and the first bracket are arranged at intervals. Relative to the bottom plate, the height of the second limiting groove is higher than the height of the first limiting groove.

[0015] In some embodiments, the connecting pipe has a welding section, and the bracket is used to position the welding section.

[0016] In some embodiments, the connecting pipe has a bent section, and the bracket is used to position the bent section.

[0017] In some embodiments, the material of the welding auxiliary positioning tooling is carbon steel material.

[0018] Compared with the prior art, the technical solution of the present invention has at least the following technical effects:

[0019] The welding auxiliary positioning tooling of the technical solution of the present application can position the connecting pipe welded to the solenoid valve body, reduce the assembly error of the connecting pipe in the air conditioning system, and thus can improve the problem that it is difficult to assemble the solenoid valve body and the coil due to the assembly error of the connecting pipe. During the assembly process of the air conditioning system, in the pipeline welding step, the connecting pipe can be preliminarily positioned by the welding auxiliary positioning tooling. In the subsequent assembly steps of the pipeline assembly and the pre-assembled unit, by aligning the welding auxiliary positioning tooling with the second installation position on the housing, the connecting pipe can be accurately installed at the pre-installation position of the connecting pipe in the housing, thereby reducing the positioning / assembly error of the connecting pipe and further reducing the positioning / assembly error of the solenoid valve body. Brief Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0021] Figure 1 Structural schematic diagram of the welding auxiliary positioning tooling of the present application in an embodiment;

[0022] Figure 2 is Figure 1 left view of;

[0023] Figure 3 Structural schematic diagram of the first bracket in an embodiment;

[0024] Figure 4 Structural schematic diagram of the first bracket in another embodiment;

[0025] Figure 5 Structural schematic diagram of the second bracket in an embodiment;

[0026] Figure 6 Cooperating schematic diagram of the welding auxiliary positioning tooling and the connecting pipe;

[0027] Figure 7 is Figure 6 front view of.

[0028] Reference Numerals:

[0029] Label Name Label Name 100 Welding auxiliary positioning tooling 110 Bottom plate 121 First bracket (bracket) 121a First limiting groove (limiting groove) 1211 First support rod 1212 Bending part 12121 First extension segment 12122 Second extension segment 122 Second bracket (bracket) 122a Second limiting groove (limiting groove) 1221 Second support rod 1222 Locking plate 210 First connecting pipe (connecting pipe) 220 Second connecting pipe (connecting pipe) 221 First connecting segment 222 Second connecting segment 223 Third connecting segment 240 Evaporator Detailed Description of the Embodiment

[0030] In order to better understand the technical solution of the present utility model, the embodiments of the present utility model will be described in detail below in conjunction with the drawings.

[0031] It should be clear that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0032] The terms used in the embodiments of the present utility model are for the purpose of describing specific embodiments only and are not intended to limit the present utility model. The singular forms "a", "said", and "the" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be understood that the term " / and / " used herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0034] The present application provides a welding auxiliary positioning tooling 100 for assisting in the installation of an air conditioning system.

[0035] The air conditioning system includes a housing, an evaporator, a compressor, a condenser, and a solenoid valve disposed in the housing, and a pipeline assembly connecting the evaporator, the compressor, the condenser, and the solenoid valve. The pipeline assembly includes multiple pipes, and the solenoid valve includes a valve body and a coil that are detachably connected. Among them, the coil is installed on the housing, and the valve body is welded to the pipe. For the sake of convenience of distinction, the pipe welded with the valve body will be hereinafter referred to as a connecting pipe.

[0036] Specifically, a first installation position is provided in the housing, and the coil of the solenoid valve is disposed at the first installation position. In the prior art, due to the positioning / assembly error in the welding of the pipeline assembly including the connecting pipe, after the valve body is welded to the connecting pipe, there will be a large deviation between the actual position and the theoretical position of the valve body, which will cause difficulties or inability to assemble the coil and the valve body in the later stage. By using the welding auxiliary positioning tooling 100 of the present application to assist in the installation of the connecting pipe in the air conditioning system, the deviation of the actual position of the valve body relative to the theoretical position can be reduced, thereby effectively solving the problem of difficult or impossible assembly of the coil and the valve body.

[0037] In the embodiments of the present application, for the sake of convenience of description, the length direction of the welding auxiliary positioning tooling 100 is defined as the X-axis direction, the width direction of the welding auxiliary positioning tooling 100 is defined as the Y-axis direction, and the height direction of the welding auxiliary positioning tooling 100 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other in pairs.

[0038] When describing the welding auxiliary positioning tooling 100 in the embodiments of the present application, the orientation terms such as "upper", "lower", "top", "bottom", "left", "right", "front", and "rear" are mainly based on the welding auxiliary positioning tooling 100 in the attached Figure 1The display orientation in [the figure] is described as follows: towards the positive direction of the Z-axis is "top" and "upper", towards the negative direction of the Z-axis is "bottom" and "lower", towards the positive direction of the X-axis is "right", towards the negative direction of the X-axis is "left", towards the positive direction of the Y-axis is "rear", and towards the negative direction of the Y-axis is "front". This does not form a limitation on the orientation of the weldable auxiliary positioning tooling 100 in the actual application scenario.

[0039] Please refer to Figures 1 - 7 , in the embodiment of the present application, the welding auxiliary positioning tooling 100 includes a bottom plate 110 and a positioning component; the positioning component is arranged on the bottom plate 110, and the positioning component includes n brackets 121(122), n≥1. A limiting groove 121a(122a) is arranged at one end of the bracket 121(122) away from the bottom plate 110 to limit the movement of the connecting pipe 210(220). Specifically, the lower end of the bracket 121(122) is fixedly connected to the bottom plate 110, and a limiting groove 121a(122a) is arranged at the upper end of the bracket 121(122) for the connecting pipe 210(220) to pass through; the bracket 121(122) and the bottom plate 110 can be integrally formed or separately formed. Preferably, the bracket 121(122) and the bottom plate 110 are integrally formed.

[0040] A second installation position is also arranged inside the housing of the air-conditioning system for installing the welding auxiliary positioning tooling 100. The assembly method of the air-conditioning system is as follows:

[0041] Unit pre-assembly: Assemble the housing, evaporator 240, condenser, compressor, etc. to obtain a pre-assembled unit;

[0042] Pipeline welding: Weld the corresponding pipelines of the pipeline components at each welding station in sequence. Among them, the connecting pipe 210(220) is placed on the welding auxiliary positioning tooling 100 for welding to perform preliminary positioning of the connecting pipe 210(220) for subsequent assembly, and a welded pipeline component (carrying the welding auxiliary positioning tooling 100) is obtained.

[0043] Assemble the pre-assembled unit and the pipeline component: First, place the welded pipeline component at the preset installation position of the housing, then assemble the valve body and the coil, and assemble the pipeline component and the corresponding components in the pre-assembled unit.

[0044] It can be understood that when the air-conditioning system is assembled, the welding auxiliary positioning tooling 100 can be taken away from the second installation position, and the welding auxiliary positioning tooling 100 can be reused to assist in the installation of the air-conditioning system.

[0045] The welding auxiliary positioning tooling 100 of the technical solution of this application can position the connecting pipe 210 (220) welded to the solenoid valve body, reduce the positioning / assembly error of the connecting pipe 210 (220) in the air-conditioning system, and thus can improve the problem that it is difficult to assemble the solenoid valve body and the coil due to the assembly error of the connecting pipe 210 (220). During the assembly process of the air-conditioning system, in the pipeline welding step, the connecting pipe 210 (220) can be preliminarily positioned through the welding auxiliary positioning tooling 100. In the subsequent assembly steps of the pipeline assembly and the pre-assembled unit, by aligning the welding auxiliary positioning tooling 100 with the second installation position on the housing, the connecting pipe 210 (220) can be accurately installed at the pre-installation position of the connecting pipe 210 (220) in the housing, thereby reducing the positioning / assembly error of the connecting pipe 210 (220), and further reducing the positioning / assembly error of the solenoid valve body.

[0046] In the embodiment of this application, the welding auxiliary positioning tooling 100 is made of a material with high strength, low density and high temperature resistance. Preferably, the material of the welding auxiliary positioning tooling 100 is carbon steel. In addition to having the characteristics of high strength, low density and high temperature resistance, carbon steel also has characteristics such as high hardness and good toughness.

[0047] In the embodiment of this application, the shape / size of the limiting groove 121a (122a) provided on the bracket 121 (122) is flexibly adjusted according to the shape / diameter of the positioned connecting pipe 210 (220), and this application does not limit this.

[0048] In the embodiment of this application, the connecting pipe 210 (220) has a welding section, and there are welding points on the welding section. The connecting pipe 210 (220) is welded to other pipelines at the welding points. The bracket 121 (122) is used to position the welding section of the connecting pipe 210 (220), that is, the welding section of the connecting pipe 210 (220) passes through the limiting groove 121a (122a) of the bracket 121 (122); for the convenience of welding the connecting pipe 210 (220), the welding points of the welding section are located outside the limiting groove 121a (122a).

[0049] In the embodiments of the present application, the connecting pipe 210 (220) has a straight section and a bent section, and the bracket 121 (122) is further used to position the bent section of the connecting pipe 210 (220). Specifically, the two ends of the bent section can be directly positioned, or the straight sections connected to the two ends of the bent section can be positioned. In the prior art, the deviation of the bending angle of the bent section of the connecting pipe 210 (220) is also an important factor affecting the assembly error of the connecting pipe 210 (220). By using the welding auxiliary positioning tooling 100 to position the bent section of the connecting pipe 210 (220), the deviation of the bending angle of the bent section of the connecting pipe 210 (220) can be corrected, which is beneficial to improving the positioning accuracy of the welding auxiliary positioning tooling 100 for the connecting pipe 210 (220).

[0050] It should be noted that the welding section of the connecting pipe 210 (220) can be located on the straight section or the bent section of the connecting pipe 210 (220). Generally, the connecting pipe 210 (220) has multiple welding sections, and the multiple welding sections can all be located on the straight section or the bent section of the connecting pipe 210 (220), or some can be located on the straight section of the connecting pipe 210 (220) and some on the bent section of the connecting pipe 210 (220). The embodiments of the present application do not limit this.

[0051] In the embodiments of the present application, the number and arrangement position of the brackets 121 (122) can be flexibly adjusted according to the actual application scenario. Here, taking the number of the brackets 121 (122) being multiple, that is, n≥2, as an example, the embodiments of the present application will be further described.

[0052] Please refer to Figure 1 、 Figure 2 and Figure 3 , in one embodiment, at least some of the n brackets 121 (122) are the first brackets 121. The limiting groove of the first bracket 121 is the first limiting groove 121a, and the first limiting groove 121a is recessed from the top of the first bracket 121.

[0053] Please continue to refer to Figure 4 , in another embodiment, the first bracket 121 includes a first support rod 1211 and a bent portion 1212. The lower end of the first support rod 1211 is fixed on the bottom plate 110, and the upper end is connected to the bent portion 1212. The bent portion 1212 includes a first extension section 12121 and a second extension section 12122. The first extension section 12121 extends from the side wall of the upper end of the first support rod 1211 in a direction away from the first support rod 1211, and the second extension section 12122 extends from the end of the first extension section 12121 away from the first support rod 1211 in a direction away from the bottom plate 110. The first limiting groove 121a is located between the second extension section 12122 and the side wall of the first bracket 121 (122) 121.

[0054] In the above embodiments, the first limiting groove 121a has a bottom wall, a front side wall and a rear side wall, and the top, left and right sides of the first limiting groove 121a are all open. When the welding auxiliary positioning tooling 100 cooperates with the connecting pipe 210 (220), the connecting pipe 210 (220) is inserted into the first limiting groove 121a.

[0055] In the above embodiments, further, the first limiting groove 121a is a clamping groove. When the welding auxiliary positioning tooling 100 cooperates with the connecting pipe 210 (220), the connecting pipe 210 (220) is clamped in the first limiting groove 121a. Such a setting can improve the fastening degree between the first bracket 121 and the connecting pipe 210 (220), and prevent the connecting pipe 210 (220) from easily coming out of the first limiting groove 121a.

[0056] Please refer to Figure 1 , Figure 2 and Figure 5 , in an embodiment, at least part of the n brackets 121 (122) are second brackets 122. The limiting groove of the second bracket 122 is the second limiting groove 122a. The second bracket 122 includes a second support rod 1221 and a locking plate 1222 that are detachably and fixedly connected. The lower end of the second support plate is fixed on the bottom plate 110, and the side wall of the upper end is recessed with the second limiting groove 122a. The locking plate 1222 covers the notch of the second limiting groove 122a.

[0057] Specifically, the second limiting groove 122a has a bottom wall, a top wall and a front side wall, and the rear, left and right sides of the second limiting groove 122a are all open. When the welding auxiliary positioning tooling 100 cooperates with the connecting pipe 210 (220), the connecting pipe 210 (220) is inserted into the second limiting groove 122a, and the locking plate 1222 covers the notch at the rear side of the second limiting groove 122a to prevent the connecting pipe 210 (220) from coming out of the notch at the rear side of the second limiting groove 122a.

[0058] In the above embodiments, one or more second limiting grooves 122a can be provided on the second bracket 122. The multiple second limiting grooves 122a are arranged in sequence along the height direction of the second support rod 1221, and the second limiting grooves 122a are configured to be arranged in one-to-one correspondence with the connecting pipes 210 (220). Specifically, when the number of solenoid valves is multiple, the number of connecting pipes 210 (220) also corresponds to multiple. Multiple connecting pipes 210 (220) located in the same welding section and close in position can be respectively positioned through the multiple limiting grooves 121a (122a) on the second brackets 122121 (122).

[0059] In the above embodiments, screw holes are provided on both the second support rod 1221 and the locking plate 1222, and the second support rod 1221 and the locking plate 1222 are detachably connected by bolts.

[0060] In one embodiment, part of the n brackets 121 (122) is the first bracket 121 and part is the second bracket 122. The first bracket 121 and the second bracket 122 are used to cooperate together to position different pipe segments of the connecting pipe 210 (220). During the assembly process of the connecting pipe 210 (220) and the welding auxiliary positioning tooling 100, first, the first bracket 121 is fitted with the corresponding pipe segment of the connecting pipe 210 (220), and then the second bracket 122 is fitted with other corresponding pipe segments of the connecting pipe 210 (220). The structural design of the first bracket 121 enables the connecting pipe 210 (220) to be quickly assembled with the first bracket 121, and the structural design of the second bracket 122 can lock the connecting pipe 210 (220) and the auxiliary positioning tooling as a whole. Therefore, by cooperating the connecting pipe 210 (220) with the first bracket 121 and the second bracket 122 together, the welding auxiliary positioning tooling 100 can improve the assembly speed of the connecting pipe 210 (220) and the welding auxiliary positioning tooling 100 while ensuring the positioning accuracy of the connecting pipe 210 (220).

[0061] Please refer to Figure 1 , in the above embodiment, the second bracket 122 is arranged at an interval from the first bracket 121. For the first bracket 121 and the second bracket 122 that position the same connecting pipe 210 (220), the height of the second limiting groove 122a is higher than the height of the first limiting groove 121a.

[0062] Specifically, the connecting pipe 210 (220) includes a first connecting section 221 and a second connecting section 222. Relative to the bottom plate 110, the height of the second connecting section 222 is higher than that of the first connecting section 221. The first limiting groove 121a is used to limit the movement of the first connecting section 221, and the second limiting groove 122a is used to limit the movement of the second connecting section 222. When the connecting pipe 210 (220) is fitted with the welding auxiliary positioning tooling 100, the first connecting section 221 is positioned by the first bracket 121, and the second connecting section 222 is positioned by the second bracket 122. This setting can prevent the first connecting section 221 from tilting up from the first limiting groove 121a under the action of the second connecting section 222, or even from disengaging from the first limiting groove 121a.

[0063] In the embodiment of the present application, the number of the first brackets 121 and the second brackets 122 can be independently one or more, and can be specifically adjusted according to the actual application scenario. When the number of the first brackets 121 / second brackets 122 is multiple, the heights of the multiple first brackets 121 / second brackets 122 can be the same or different.

[0064] The welding auxiliary positioning tooling 100 of the present application will be further described below in combination with specific application scenarios.

[0065] In one embodiment, the air-conditioning system includes a first solenoid valve and a second solenoid valve. The air-conditioning system forms a main circuit and a bypass branch. Among them, the main circuit includes a compressor, a condenser, a first solenoid valve, and an evaporator 240 connected in series in sequence. One end of the bypass branch is communicated with the outlet of the compressor, and the other end is communicated with the inlet end of the evaporator 240. The second solenoid valve is arranged on the bypass branch.

[0066] The pipeline assembly includes a first connecting pipe 210 and a second connecting pipe 220. The valve body of the first solenoid valve is welded to the first connecting pipe 210. The first connecting pipe 210 is used to connect the outlet end of the condenser and the inlet end of the evaporator 240. The valve body of the second solenoid valve is welded to the second connecting pipe 220. The second connecting pipe 220 is used to connect the outlet end of the compressor and the inlet end of the evaporator 240.

[0067] More specifically, the second connecting pipe 220 includes a first connecting section 221, a second connecting section 222, and a third connecting section 223. The first connecting section 221 and the second connecting section 222 are connected through a bending section. The valve body of the second solenoid valve is welded to the first connecting section 221. One end of the third connecting section 223 is connected to the first connecting section 221, and the other end is connected to the air inlet of the evaporator 240. The third connecting section 223 is a bending section.

[0068] Please refer to Figure 6 and Figure 7 , in this embodiment, the welding auxiliary positioning tooling 100 includes a bottom plate 110 and five brackets 121(122) arranged above the bottom plate 110. Among them, three are first brackets 121, and the other two are second brackets 122. And two second limit slots 122a are provided on both of these two second brackets 122. In the air-conditioning system, the first connecting section 221 of the second connecting pipe 220 cooperates with one of the first brackets 121, and both ends of the third connecting section 223 of the second connecting pipe 220 cooperate with the other two first brackets 121. The first connecting pipe 210 and the third connecting section 223 of the second connecting pipe 220 respectively cooperate with the two limit slots 122a of the second bracket 122.

[0069] It can be understood that in the welding auxiliary positioning tooling 100, the number of the brackets 121(122), the height / arrangement position of each bracket 121(122), etc. are all designed according to the pre-installation position of the connecting pipes 210(220). When the connection mode of the pipelines in the air-conditioning system changes and the installation position or arrangement position of the pipelines changes, the arrangement positions of the brackets 121(122) in the welding auxiliary positioning tooling 100 may also need to be adjusted accordingly.

[0070] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the present utility model.

Claims

1. A welding auxiliary positioning tooling, which is used to assist in the installation of an air conditioning system, and is characterized in that, The air conditioning system includes a housing, a solenoid valve, and a connecting pipe. The valve body of the solenoid valve is welded to the connecting pipe. A first mounting position and a second mounting position are provided in the housing for mounting the coil of the solenoid valve and the welding auxiliary positioning tooling respectively; The welding auxiliary positioning tooling includes: A bottom plate; A positioning assembly provided on the bottom plate. The positioning assembly includes n brackets, where n≥1. A limiting groove is provided at one end of the bracket away from the bottom plate for the connecting pipe to pass through, and the movement of the connecting pipe is restricted by the bracket through the limiting groove.

2. The welding auxiliary positioning tooling according to claim 1, wherein When n≥2, at least part of the n brackets are first brackets. The limiting groove of the first bracket is a first limiting groove, which is recessed from one end of the first bracket facing away from the bottom plate; or, The first bracket includes a first support rod and a bent portion. One end of the first support rod is fixed to the bottom plate, and the other end is connected to the bent portion. The bent portion includes a first extension section and a second extension section. The first extension section extends from the side wall of the first support rod away from the first support rod, and the second extension section extends from one end of the first extension section away from the first support rod facing away from the bottom plate. The first limiting groove is located between the second extension section and the side wall of the first bracket.

3. The welding auxiliary positioning tooling according to claim 2, wherein Part of the n brackets are second brackets. The limiting groove of the second bracket is a second limiting groove. The second bracket includes a second support rod and a locking plate that are detachably and fixedly connected. One end of the second support rod is fixed to the bottom plate, and a second limiting groove is recessed in the side wall of the other end. The locking plate covers the notch of the second limiting groove.

4. The welding auxiliary positioning tooling according to claim 3, wherein The second bracket is provided with a plurality of second limiting grooves, and the plurality of second limiting grooves are arranged in sequence along the height direction of the second support rod. The second limiting grooves are configured to be arranged in one-to-one correspondence with the connecting pipe.

5. The welding auxiliary positioning tooling according to claim 3, wherein, The connecting pipe includes a first connecting section and a second connecting section. The first limiting groove is used to restrict the movement of the first connecting section, and the second limiting groove is used to restrict the movement of the second connecting section.

6. The welding auxiliary positioning tooling according to claim 5, wherein, The second bracket and the first bracket are arranged at intervals. Relative to the bottom plate, the height of the second limiting groove is higher than the height of the first limiting groove.

7. The welding auxiliary positioning tooling according to claim 1, wherein, The connecting pipe has a welding section, and the bracket is used to position the welding section.

8. The welding auxiliary positioning tooling according to claim 1, wherein, The connecting pipe has a bent section, and the bracket is used to position the bent section.

9. The welding auxiliary positioning tooling according to claim 1, wherein, The material of the welding auxiliary positioning tooling is carbon steel material.

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