A welding aid for a post-processing device exhaust section

Abstract

The application provides a welding auxiliary device for an exhaust section of an aftertreatment device, which can be adapted to various models of off-road aftertreatment device products and has good versatility, and comprises an exhaust section cylinder positioning mechanism and a tail pipe positioning assembly. The tail pipe positioning assembly comprises a vertical support, a matched guide column and a guide sleeve are mounted on the vertical support, a limiting plate is arranged at the upper end of the guide column, a positioning connecting plate is connected to the lower end of the guide column, the positioning connecting plate is further rotationally connected with an operating handle, at least two limiting clamping grooves are arranged on the vertical support, the operating handle can be clamped in the limiting clamping grooves, a tail pipe positioning support is connected to one end of the positioning connecting plate through a rotating shaft, locking positioning holes are further arranged on the positioning connecting plate and the tail pipe positioning support, the positioning connecting plate and the tail pipe positioning support are fixedly connected through bolts matched with the locking positioning holes, and the tail pipe positioning support can guide and limit the tail pipe.

Description

Technical Field

[0001] This invention relates to the field of production auxiliary equipment technology for exhaust gas aftertreatment devices, and specifically to a welding auxiliary device for the exhaust section of an aftertreatment device. Background Technology

[0002] With the advent of non-road T4 emission regulations, the demand for agricultural machinery is increasing. For example, Chinese invention patent CN216866819U discloses a protective device for a non-road diesel engine exhaust aftertreatment device, and Chinese invention patent CN217558415U discloses a heat insulation structure for a catalytic muffler. In both cases, the non-road aftertreatment device has a long tailpipe with a bend connected to the exhaust section. In order to prevent the high-temperature exhaust aftertreatment device from igniting weeds and dry branches in the field, a small bracket is welded to the outside of the aftertreatment device to install a heat insulation cover.

[0003] The problem in the production of this type of off-road aftertreatment device is that, in order to adapt to off-road vehicle equipment from different manufacturers, the direction of the tailpipe of the exhaust section of the aftertreatment device is set differently, while the position of the small bracket welded externally is relatively fixed. Currently, there is a lack of suitable equipment to assist in the welding work of the tailpipe of the exhaust section of the aftertreatment device, and it is also necessary to adapt to multiple models of aftertreatment devices. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a welding auxiliary device for the exhaust section of an after-treatment device, which is compatible with various models of off-road after-treatment devices and has good versatility.

[0005] The technical solution is as follows: A welding auxiliary device for the exhaust section of a post-processing unit, comprising:

[0006] An exhaust section cylinder fixing mechanism, wherein the exhaust section cylinder fixing mechanism includes a positioning base, and the exhaust section cylinder is fixed on the positioning base;

[0007] Its characteristic is that it further includes:

[0008] A tailpipe positioning assembly includes a vertical support, on which a matching guide post and guide sleeve are mounted. A limit plate is provided at the upper end of the guide post, and a positioning connecting plate is connected to the lower end of the guide post. The positioning connecting plate is also rotatably connected to an operating handle. The vertical support has at least two limit slots, in which the operating handle can be engaged. One end of the positioning connecting plate is connected to a tailpipe positioning bracket via a rotating shaft. Both the positioning connecting plate and the tailpipe positioning bracket have locking positioning holes. The positioning connecting plate and the tailpipe positioning bracket are fixedly connected by bolts engaging with the locking positioning holes. The tailpipe positioning bracket can guide and limit the tailpipe.

[0009] Furthermore, the tailpipe positioning bracket is provided with two parallel positioning plates, the distance between the positioning plates is matched with the outer diameter of the tailpipe, and the tailpipe is clamped between the two positioning plates and limited by the positioning plates.

[0010] Furthermore, the positioning connecting plate and the operating handle are respectively provided with mounting holes, and the positioning connecting plate and the operating handle are connected together by bolts and nuts.

[0011] Furthermore, the positioning base includes at least three positioning blocks arranged circumferentially on the base, and the positioning blocks are provided with arc-shaped limiting grooves adapted to the exhaust section cylinder, and the exhaust section cylinder is fitted between the positioning blocks.

[0012] Furthermore, it also includes an exhaust section cylinder fixing mechanism, which includes a clamping mechanism support located on one side of the exhaust section cylinder fixing mechanism. The upper end of the clamping mechanism support is provided with a quick clamp, and the front end of the quick clamp is connected to a pressure plate. Moving the quick clamp can press the pressure plate onto the upper end of the exhaust section cylinder to fix the exhaust section cylinder.

[0013] Furthermore, it also includes a tailpipe support positioning mechanism, which includes a guide support located on the side of the exhaust section cylinder fixing mechanism. A linear drive device is installed on the guide support, and the front end of the linear drive device is connected to a tailpipe support positioning connecting plate. A bearing sleeve and a guide column are also provided on the guide support for guiding cooperation. The front end of the guide column is connected to the tailpipe support positioning connecting plate. A support contour positioning seat is fixed on the tailpipe support positioning connecting plate through a connecting plate, and the tailpipe support can be fixed on the support contour positioning seat.

[0014] Furthermore, the guide support is also provided with a tailpipe bracket positioning and connecting plate limiting block, which extends to the front side of the tailpipe bracket positioning and connecting plate to limit the tailpipe bracket positioning and connecting plate.

[0015] Furthermore, it also includes a cylindrical support positioning mechanism, which includes a guide shaft seat mounted on a base plate. The guide shaft seat is equipped with a cooperating guide shaft and a bushing. The front end of the guide shaft is connected to a support contour positioning seat mounting plate. A spring is provided on the guide shaft between the guide shaft seat and the support contour positioning seat. A moving handle is also provided on the rear side of the guide shaft. A handle slot is correspondingly provided on the rear side of the guide shaft seat. The support contour positioning seat is mounted on the support contour positioning seat mounting plate. The cylindrical support can be fixed on the support contour positioning seat. A slide rail is also provided on the base plate and in front of the guide shaft seat. A slide groove that cooperates with the slide rail is correspondingly provided at the lower end of the support contour positioning seat mounting plate. A limit block is also provided on the front side of the slide rail.

[0016] Furthermore, the bracket contour positioning seat is provided with a limiting groove that matches the tailpipe bracket or the cylindrical bracket. The bracket contour positioning seat is also provided with a positioning hole corresponding to the welding nut of the tailpipe bracket or the cylindrical bracket. A magnet is provided in the positioning hole, and the tailpipe bracket or the cylindrical bracket is attracted to the bracket contour positioning seat by the magnet.

[0017] Furthermore, the magnet is a ring magnet, and a bracket positioning pin is provided in the positioning hole, which passes through the ring magnet. The bracket positioning pin can extend into the welding nut of the tailpipe bracket to position the tailpipe bracket or the cylinder bracket.

[0018] Furthermore, a sliding guide rail is provided on the base, and a slider is provided on the sliding guide rail. The cylinder support positioning mechanism is fixed on the slider. A first sliding positioning hole is also provided on the base plate of the cylinder support positioning mechanism. A corresponding sliding positioning plate is provided on the base, and a second sliding positioning hole is provided on the sliding positioning plate. The positioning pin can pass through the first sliding positioning hole and the second sliding positioning hole to position the cylinder support positioning mechanism on the slider.

[0019] This invention provides a welding auxiliary device for the exhaust section of a post-processing unit. It fixes the exhaust section cylinder using an exhaust section cylinder fixing mechanism and positions the tailpipe using a tailpipe positioning assembly. The tailpipe orientation is adjustable. A positioning connecting plate is connected to a tailpipe positioning bracket via a rotating shaft. Both the positioning connecting plate and the tailpipe positioning bracket are provided with locking positioning holes. The locking is achieved by bolts engaging with the locking positioning holes, allowing adjustment of the tailpipe angle for different products. When handling the tailpipe assembly, the tailpipe positioning assembly can be lifted upwards. The vertical support has at least two limiting slots, and the operating handle can be engaged in these slots. The lower limiting slot is used for positioning, while the upper limiting slot is used for clearance during handling, making it convenient to use. The welding auxiliary device for the exhaust section in this application also includes an exhaust section cylinder fixing mechanism to assist in fixing the exhaust section cylinder. This mechanism uses quick-clamping clamps for easy and fast operation.

[0020] In addition, the welding auxiliary device of the present invention can also realize external bracket welding assistance. For brackets at different positions on the tailpipe and exhaust end cylinder, the present solution respectively sets a tailpipe bracket positioning mechanism and a cylinder bracket positioning mechanism. The tailpipe bracket positioning mechanism adopts a bracket contour positioning seat, which can directly attract the bracket with a magnet. At the same time, the bracket contour positioning seat is also equipped with a positioning pin to position the bracket attracted by the magnet, ensuring the accuracy of the bracket positioning position. The tailpipe bracket positioning mechanism moves the bracket contour positioning seat through a linear drive device. The linear drive device, in conjunction with the guide shaft bushing, can move linearly, thereby realizing the movement and positioning of the bracket on the tailpipe. The bracket is very convenient to install and remove. The cylinder bracket positioning mechanism also adopts a bracket contour positioning seat. The cylinder bracket positioning mechanism installs a guide shaft and a bushing on the guide shaft seat. The bracket contour positioning seat is connected to the front end of the guide shaft, and a spring is installed on the guide shaft. The handle drives the guide shaft to move, allowing for the placement and removal of the bracket. After the bracket is placed on the bracket contour positioning seat, the guide shaft moves under the force of the spring, positioning the bracket to contact the exhaust section cylinder, facilitating the welding of the exhaust section cylinder and the bracket. This welding auxiliary device has good versatility and is suitable for welding the exhaust end cylinder and tailpipe of various non-road aftertreatment devices. It can also be used to weld external brackets of the exhaust section. Through one welding auxiliary device, welding assistance can be completed for the tailpipe and exhaust end cylinder, as well as welding assistance for the bracket and tailpipe and exhaust end cylinder. These two welding assistance methods complement each other. The external bracket welding positioning can also help confirm the installation angle of the exhaust end cylinder and tailpipe, further ensuring the reliability of the installation. The tailpipe positioning component and the exhaust section cylinder fixing mechanism also play a role in assisting in fixing and positioning the exhaust section cylinder and tailpipe during bracket welding, ensuring accurate positioning and welding of each component. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0023] Figure 1 This is a perspective view of a welding auxiliary device for the exhaust section of a post-processing device in one of the embodiments;

[0024] Figure 2 This is a first-view perspective view of the welding auxiliary device in the embodiment after the tailpipe support and cylinder support have been installed.

[0025] Figure 3 This is a second-view perspective perspective view of the welding auxiliary device in the embodiment after the tailpipe support and cylinder support have been installed.

[0026] Figure 4 This is a schematic diagram of the bracket contour positioning seat and tail tube bracket in the embodiment;

[0027] Figure 5 This is a schematic diagram of a cylindrical support positioning mechanism in one embodiment;

[0028] Figure 6 This is a first-view perspective view of the welding auxiliary device, exhaust end cylinder, and tailpipe after they have been positioned in the embodiment.

[0029] Figure 7 This is a second-view perspective perspective view of the welding auxiliary device, exhaust end cylinder, and tailpipe after they have been positioned in the embodiment. Detailed Implementation

[0030] Given the current lack of suitable equipment to assist in the welding of exhaust tailpipes for off-road aftertreatment devices, and the need to adapt to multiple models of aftertreatment devices, see... Figures 1 to 7 The present invention provides a welding auxiliary device for the exhaust section of a post-processing unit, comprising:

[0031] The exhaust section cylinder fixing mechanism 100 includes a positioning base 101, on which the exhaust section cylinder 1 is fixed, and also includes:

[0032] The tailpipe positioning assembly 200 includes a vertical support 201, on which a guide post 202 and a guide sleeve 203 are mounted. A limit plate 204 is provided at the upper end of the guide post 202, and a positioning connecting plate 205 is connected to the lower end of the guide post 202. The positioning connecting plate 205 is also rotatably connected to an operating handle 206. Two limit slots 207 are provided on the vertical support 201, allowing the operating handle 206 to be engaged in the limit slots 207. One end of the positioning connecting plate 205 is connected to a tailpipe positioning bracket 209 via a rotating shaft 208. Locking positioning holes 210 are also provided on the positioning connecting plate 205 and the tailpipe positioning bracket 209. The positioning connecting plate 205 and the tailpipe positioning bracket 209 are fixedly connected by bolts engaging with the locking positioning holes 210. The tailpipe positioning bracket 209 can guide and limit the tailpipe 2.

[0033] Specifically, the tailpipe positioning bracket 209 is provided with two parallel positioning plates 211. The distance between the positioning plates 211 matches the outer diameter of the tailpipe 2. The tailpipe 2 is clamped between the two positioning plates 211 and is limited by the positioning plates 211. The positioning connecting plate 205 and the operating handle 206 are respectively provided with mounting holes. The positioning connecting plate 205 and the operating handle 206 are connected together by bolts 212 and nuts 213.

[0034] After the tailpipe 2 is inserted into the exhaust section cylinder 1, the direction of the tailpipe can be positioned by the tailpipe positioning bracket 209. The angle of the tailpipe bracket has been fixed in advance by adjusting the angle of the positioning connecting plate 205 and the tailpipe positioning bracket 209 according to the actual angle requirements of the product. By lifting the guide post 202 by operating the handle, the switching between different limit slots can be realized. The lower limit slot is used for positioning, and the upper limit slot is used for avoidance when picking up and putting down parts, which is convenient to use.

[0035] In an embodiment of the present invention, the positioning base 101 includes three positioning blocks 103 arranged circumferentially on the base 102. The positioning blocks 103 are provided with arc-shaped limiting grooves 104 adapted to the exhaust section cylinder 1, and the exhaust section cylinder 1 is fitted between the positioning blocks 103.

[0036] In one embodiment of the present invention, an exhaust section cylinder fixing mechanism 300 is also included. The exhaust section cylinder fixing mechanism 300 includes a clamping mechanism support 301 located on one side of the exhaust section cylinder fixing mechanism 300. A quick clamp 302 is provided at the upper end of the clamping mechanism support 301. A pressure plate 303 is connected to the front end of the quick clamp 302. Moving the quick clamp 302 can press the pressure plate 303 onto the upper end of the exhaust section cylinder 1 to fix the exhaust section cylinder 1. The exhaust section cylinder fixing mechanism 300 can further improve the reliability of positioning.

[0037] In one embodiment of the present invention, a tailpipe support positioning mechanism 400 is further included. The tailpipe support positioning mechanism 400 includes a guide support 401 located on the side of the exhaust section cylinder fixing mechanism 300. A linear drive device 407 is installed on the guide support 401. In this embodiment, the linear drive device is a linear quick clamp. The front end of the linear drive device is connected to a tailpipe support positioning connecting plate 402. A bearing sleeve 403 and a guide post 404 are also provided on the guide support 401 for guiding cooperation. The front end of the guide post 404 is connected to the tailpipe support positioning connecting plate 402. A support contour positioning seat 500 is fixed on the tailpipe support positioning connecting plate 402 through a connecting plate 405. The tailpipe support 3 can be fixed on the support contour positioning seat 500.

[0038] In addition, the guide support is also provided with a tailpipe bracket positioning connection plate limiting block 406. The tailpipe bracket positioning connection plate limiting block 406 extends to the front side of the tailpipe bracket positioning connection plate 402 to limit the tailpipe bracket positioning connection plate 402. The tailpipe bracket positioning connection plate limiting block 406 ensures that the tailpipe bracket on the bracket contour positioning seat 500 moves into place, while also avoiding excessive contact.

[0039] The tailpipe bracket positioning mechanism uses a bracket contour positioning seat, which can directly attract the bracket with a magnet. At the same time, the bracket contour positioning seat is also equipped with a positioning pin to position the bracket attracted by the magnet, ensuring the accuracy of the bracket's positioning position. The tailpipe bracket positioning mechanism moves the bracket contour positioning seat through a linear drive device. The linear drive device, in conjunction with the guide shaft bushing, can move linearly, thereby realizing the movement and positioning of the bracket on the tailpipe. The bracket is very easy to install and remove.

[0040] In one embodiment of the present invention, a cylindrical support positioning mechanism 600 is further included. The cylindrical support positioning mechanism 600 includes a guide shaft seat 602 mounted on a base plate 601. A guide shaft 603 and a bushing 604 are mounted on the guide shaft seat 602. The front end of the guide shaft 603 is connected to a support contour positioning seat mounting plate 605. A spring 606 is provided on the guide shaft 603 between the guide shaft seat 602 and the support contour positioning seat 604. A moving handle 607 is also provided on the rear side of the guide shaft 603. A handle slot 608 is correspondingly provided on the rear side of the guide shaft seat 602. A moving handle 607 is mounted on the support contour positioning seat mounting plate 605. The bracket has a contour positioning seat 500, on which the cylinder bracket 4 can be fixed. A slide rail 609 is also provided on the base plate 601 and in front of the guide shaft seat 602. The lower end of the bracket contour positioning seat mounting plate 605 is provided with a slide groove 610 that cooperates with the slide rail 609. A limit block 611 is also provided in front of the slide rail. After the bracket is placed on the bracket contour positioning seat, the guide shaft will move under the action of the spring, sending the bracket to the position that contacts the exhaust section cylinder, which facilitates the welding of the exhaust section cylinder and the bracket. The limit block 611 in front of the slide rail can prevent the cylinder bracket 4 from excessively contacting the exhaust end cylinder.

[0041] The cylinder support positioning mechanism also uses a support contour positioning seat. The cylinder support positioning mechanism installs a guide shaft and bushing on the guide shaft seat. The support contour positioning seat is connected to the front end of the guide shaft, and a spring is installed on the guide shaft. The guide shaft is moved by moving the handle, which can pick up and put down the support. After the support is placed on the support contour positioning seat, the guide shaft will move under the force of the spring, sending the support to the position where it contacts the exhaust section cylinder, which facilitates the welding of the exhaust section cylinder and the support. For the positioning of the support on the exhaust pipe cylinder, a set of guide shaft bushings is used in conjunction with the bottom slide rail for linear movement. The parts are manually moved by the spring force for loading and unloading. The lower limit block has a limit to restrict the pushing stroke.

[0042] In this invention, the bracket contour positioning seat 500 is provided with a limiting groove 501 that matches the tail tube bracket or the cylindrical bracket. The bracket contour positioning seat 500 is also provided with a positioning hole 502 corresponding to the welding nut of the tail tube bracket or the cylindrical bracket. A magnet 503 is provided in the positioning hole 502. The tail tube bracket or the cylindrical bracket is attracted to the bracket contour positioning seat 500 by the magnet 503.

[0043] In one embodiment of the present invention, the magnet 503 is a ring magnet, and a bracket positioning pin 504 passing through the ring magnet is also provided in the positioning hole 502. The bracket positioning pin 504 can extend into the welding nut of the tail tube bracket to position the tail tube bracket or the cylinder bracket.

[0044] The bracket contour positioning seat 500 uses the cooperation of the limiting groove 501 and the bracket positioning pin 504 to position the tail tube bracket or cylinder bracket. The bracket contour positioning seat 500 uses a magnet to hold the bracket in place and to release it.

[0045] In one embodiment of the present invention, a sliding guide rail 105 is provided on the base 102, and a slider 106 is provided on the sliding guide rail 105. The cylinder support positioning mechanism 600 is fixed on the slider 106. A first sliding positioning hole 612 is also provided on the base plate of the cylinder support positioning mechanism. A corresponding sliding positioning plate 107 is provided on the base 102. A second sliding positioning hole 613 is provided on the sliding positioning plate 107. The positioning post 108 can pass through the first sliding positioning hole 612 and the second sliding positioning hole 613 to position the cylinder support positioning mechanism 600 on the slider 106. By providing the sliding guide rail 105, the cylinder support positioning mechanism 600 can be moved. The cylinder support positioning mechanism 600 can be moved away first when fixing the exhaust section cylinder 1.

[0046] The welding auxiliary device of the present invention has good versatility and is applicable to the welding of exhaust end cylinder and tailpipe of various types of off-road aftertreatment devices. It can also be used to weld the external support of the exhaust section. With one welding auxiliary device, the welding assistance between the tailpipe and the exhaust end cylinder, as well as the welding assistance between the support and the tailpipe and the exhaust end cylinder, can be completed. At the same time, the two welding assistances complement each other. The external support welding positioning can also help confirm the installation angle of the exhaust end cylinder and the tailpipe, further ensuring the reliability of the installation. The tailpipe positioning component and the exhaust section cylinder fixing mechanism also play a role in assisting in fixing the exhaust section cylinder and the tailpipe and positioning when welding the support, ensuring the accurate positioning and welding of each component.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A welding auxiliary device for the exhaust section of a post-processing unit, comprising: An exhaust section cylinder fixing mechanism, wherein the exhaust section cylinder fixing mechanism includes a positioning base, and the exhaust section cylinder is fixed on the positioning base; Its characteristic is that it further includes: A tailpipe positioning assembly includes a vertical support, on which a matching guide post and guide sleeve are mounted. A limit plate is provided at the upper end of the guide post, and a positioning connecting plate is connected to the lower end of the guide post. The positioning connecting plate is also rotatably connected to an operating handle. The vertical support has at least two limit slots, in which the operating handle can be engaged. One end of the positioning connecting plate is connected to a tailpipe positioning bracket via a rotating shaft. Locking positioning holes are also provided on the positioning connecting plate and the tailpipe positioning bracket. The positioning connecting plate and the tailpipe positioning bracket are fixedly connected by bolts engaging with the locking positioning holes. The tailpipe positioning bracket can guide and limit the tailpipe. It also includes an exhaust section cylinder fixing mechanism, which includes a clamping mechanism support located on one side of the exhaust section cylinder fixing mechanism. The upper end of the clamping mechanism support is provided with a quick clamp, and the front end of the quick clamp is connected to a pressure plate. Moving the quick clamp can press the pressure plate onto the upper end of the exhaust section cylinder to fix the exhaust section cylinder. It also includes a tailpipe bracket positioning mechanism, which includes a guide support located on the side of the exhaust section cylinder fixing mechanism. A linear drive device is installed on the guide support. The front end of the linear drive device is connected to a tailpipe bracket positioning connecting plate. A bearing sleeve and a guide column are also provided on the guide support. The front end of the guide column is connected to the tailpipe bracket positioning connecting plate. A bracket contour positioning seat is fixed on the tailpipe bracket positioning connecting plate through a connecting plate. The tailpipe bracket can be fixed on the bracket contour positioning seat. It also includes a cylindrical support positioning mechanism, which includes a guide shaft seat mounted on a base plate, a guide shaft and a bushing mounted on the guide shaft seat, a support contour positioning seat mounting plate connected to the front end of the guide shaft, a spring provided on the guide shaft between the guide shaft seat and the support contour positioning seat, a moving handle provided on the rear side of the guide shaft, a handle slot provided on the rear side of the guide shaft seat, a support contour positioning seat mounted on the support contour positioning seat mounting plate, and the cylindrical support can be fixed on the support contour positioning seat. A slide rail is also provided on the base plate and in front of the guide shaft seat, a slide groove corresponding to the slide rail is provided at the lower end of the support contour positioning seat mounting plate, and a limit block is provided on the front side of the slide rail. The bracket contour positioning seat is provided with a limiting groove that matches the tailpipe bracket or the cylinder bracket. The bracket contour positioning seat is also provided with a positioning hole corresponding to the welding nut of the tailpipe bracket or the cylinder bracket. A magnet is provided in the positioning hole, and the tailpipe bracket or the cylinder bracket is attracted to the bracket contour positioning seat by the magnet.

2. The welding auxiliary device for the exhaust section of a post-processing unit according to claim 1, characterized in that: The tailpipe positioning bracket is provided with two parallel positioning plates. The distance between the positioning plates matches the outer diameter of the tailpipe. The tailpipe is clamped between the two positioning plates and is limited by the positioning plates. The positioning connecting plate and the operating handle are respectively provided with mounting holes. The positioning connecting plate and the operating handle are connected together by bolts and nuts.

3. A welding auxiliary device for the exhaust section of a post-processing unit according to claim 1, characterized in that: The positioning base includes at least three positioning blocks arranged circumferentially on the base. The positioning blocks are provided with arc-shaped limiting grooves that are adapted to the exhaust section cylinder. The exhaust section cylinder is fitted between the positioning blocks.

4. A welding auxiliary device for the exhaust section of a post-processing unit according to claim 1, characterized in that: The guide support is also provided with a tailpipe bracket positioning and connecting plate limiting block, which extends to the front side of the tailpipe bracket positioning and connecting plate to limit the tailpipe bracket positioning and connecting plate.

5. A welding auxiliary device for the exhaust section of a post-processing unit according to claim 1, characterized in that: The magnet is a ring magnet, and a bracket positioning pin is provided in the positioning hole through which the ring magnet passes. The bracket positioning pin can extend into the welding nut of the tailpipe bracket to position the tailpipe bracket or the cylinder bracket.

6. A welding auxiliary device for the exhaust section of a post-processing unit according to claim 3, characterized in that: The base is provided with a sliding guide rail, and a slider is provided on the sliding guide rail. The cylinder support positioning mechanism is fixed on the slider. The base plate of the cylinder support positioning mechanism is also provided with a first sliding positioning hole. The base is provided with a corresponding sliding positioning plate, and the sliding positioning plate is provided with a second sliding positioning hole. The positioning pin can pass through the first sliding positioning hole and the second sliding positioning hole to position the cylinder support positioning mechanism on the slider.

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