Exhaust pipe welding device

Abstract

An exhaust pipe welding device comprises a base, a bearing part, a flange fixing part, a positioning part and an adjusting part are installed on the base, and the bearing part, the flange fixing part and the positioning part are detachably installed on the base through the adjusting part. The positions of the bearing part, the flange fixing part and the positioning part can be changed relative to the base through the adjusting part, the bearing part is used for containing a pipe body of the exhaust pipe, the flange fixing part is used for fixing a connecting flange of the exhaust pipe, the positioning part is used for fixing the free end of the pipe body, the structure is simple, adjustment is convenient, and the practicability is high. Adjustment can be carried out according to exhaust pipes of different specifications, good applicability is achieved, and the welding quality of the connecting flange can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust pipes, in particular to an exhaust pipe welding device. Background Art

[0002] The exhaust pipe is an important pipe structure installed between the engine and the muffler of the car. It can cooperate with the muffler to achieve the effect of vibration reduction and noise reduction. The exhaust pipe usually includes a pipe body and a connecting flange at the end of the pipe body. The connecting flange is connected to the end of the pipe body through a welding process. The connecting flange can realize the connection of the pipe body. The welding quality of the connecting flange directly affects the installation of the exhaust pipe. If the welding quality is poor, it will cause deviations in the installation position and affect the sealing of the pipe body.

[0003] In the prior art, when welding connecting flanges, the pipe body needs to be fixed and then the connecting flange is welded on the end of the pipe body. Since the shape of the pipe body is complex and curved, it is difficult to fix it. It is necessary to independently develop corresponding fixing molds according to the different shapes of the pipe body, which has high investment costs and poor flexibility. Utility Model Content

[0004] In view of this, an object of the utility model is to provide an exhaust pipe welding device, which can be adjusted according to the specifications of the exhaust pipe to be suitable for welding different exhaust pipes, has a simple structure and is easy to adjust.

[0005] The utility model provides an exhaust pipe welding device, comprising a base, on which a supporting part, a flange fixing part, a positioning part and an adjusting part are installed, the supporting part, the flange fixing part and the positioning part are detachably installed on the base through the adjusting part, the adjusting part enables the supporting part, the flange fixing part and the positioning part to change positions relative to the base, the supporting part is used to place the pipe body of the exhaust pipe, the flange fixing part is used to fix the connecting flange of the exhaust pipe, and the positioning part is used to fix the free end of the pipe body.

[0006] In one embodiment, the supporting portion includes a support, a receiving groove is opened at the upper end of the support, the receiving groove is opened along the left-right direction and passes through the left and right end surfaces of the support, the tube body is partially accommodated in the receiving groove, and a limit member is detachably installed in the receiving groove, and the limit member is used to adjust the slot size of the receiving groove.

[0007] In one embodiment, the limiting member includes an abutment plate and positioning plates located at the left and right ends of the abutment plate, the positioning plate extends in the front-to-back direction, the abutment plate is detachably mounted on the groove wall of the accommodating groove, the abutment plate is used to contact the tube body, and the positioning plate is used to contact the left and right ends of the support.

[0008] In one embodiment, the flange fixing portion includes a fixing seat and a clamping member, a positioning column is protrudingly provided on one side of the fixing seat close to the connecting end of the tube body, an opening is provided on the positioning column to cooperate with the welding stud of the connecting flange, the welding stud is passed through the opening, and the clamping member is used to fix the connecting flange to the fixing seat.

[0009] In one embodiment, the flange fixing portion further includes a slide and a base, wherein the slide is connected to the fixing base and is movably mounted on the base, and the slide can move closer to and / or away from the connecting end of the tube body relative to the base.

[0010] In one embodiment, a limit seat is provided on one side of the base, a plurality of stop grooves are formed on the limit seat, a stop rod cooperating with the stop groove is installed on the sliding seat, the stop rod can move towards and / or away from the limit seat, and the stop rod can be clamped in the stop groove.

[0011] In one embodiment, the positioning portion includes a connecting seat and a positioning member, the positioning member includes an adjusting rod and a sleeve, the connecting seat is provided with a positioning hole for passing the adjusting rod, the adjusting rod can move closer to and / or away from the free end of the tube body in the positioning hole, one end of the adjusting rod is connected to the sleeve, the sleeve includes a sleeve hole matching the outer diameter of the tube body, and the sleeve can be sleeved on the free end of the tube body.

[0012] In one embodiment, a plurality of first connecting grooves are formed on the base, the adjusting portion comprises a connecting member, a second connecting groove matching with the first connecting groove is formed on the connecting member, and the first connecting groove and the second connecting groove are matched and connected.

[0013] In one embodiment, a limiting groove cooperating with the connecting piece is opened at the upper end of the base, the first connecting groove is opened at the bottom of the limiting groove, the connecting piece is at least partially installed in the limiting groove, and can rotate around its own axis in the limiting groove, the second connecting groove penetrates the connecting piece in the up and down directions, the orthographic projection of the second connecting groove in the up and down directions can be located in the first connecting groove, and the connecting piece can be fixed to the limiting groove by a locking piece.

[0014] In one embodiment, the adjustment part also includes a connecting shaft and a bracket, and the base is provided with an axial hole that cooperates with the connecting shaft and a slot that cooperates with the bracket, and the slot is opened at the lower end of the base, one end of the connecting shaft is connected to the lower end of the connecting member, and the other end passes through the axial hole and is connected to the bracket, and the bracket can be rotatably accommodated in the slot.

[0015] The beneficial effects of the utility model are:

[0016] By providing a supporting part, the supporting part is used to place the pipe body of the exhaust pipe, and the supporting part is detachably mounted on the base through the adjusting part, so that the position of the supporting part can be adjusted according to the specifications and shape of the pipe body, so as to facilitate the fixing of the pipe body;

[0017] By providing a flange fixing portion, the flange fixing portion can fix the connecting flange of the connecting end of the pipe body, so as to facilitate welding the connecting flange to the pipe body, and the position of the flange fixing portion is adjusted by the adjusting portion to fix the connecting flange according to the position of the connecting end;

[0018] By setting a positioning part, the positioning part is used to fix the free end of the pipe body to prevent the free end from shifting during welding. The positioning part can cooperate with the flange fixing part, which is beneficial to improving the welding quality of the connecting flange. The position of the positioning part can be adjusted by the adjustment part to adjust the position of the positioning part according to the specifications and shape of the pipe body.

[0019] The entire welding device has a simple structure and is easy to adjust. The positions of the supporting part, the flange fixing part and the positioning part can be adjusted according to exhaust pipes of different specifications. It has good applicability and is conducive to ensuring the welding quality of the connecting flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0022] Figure 2 This is a schematic structural diagram of an exhaust pipe according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic structural diagram of a supporting part and an adjusting part according to an embodiment of the utility model;

[0024] Figure 4 A cross-sectional view of a supporting portion and an adjusting portion of an embodiment of the utility model;

[0025] Figure 5 This is an exploded schematic diagram of a flange fixing portion of an embodiment of the utility model;

[0026] Figure 6 Another exploded schematic diagram of a flange fixing portion of an embodiment of the utility model;

[0027] Figure 7 It is a structural schematic diagram of a positioning part according to an embodiment of the utility model.

[0028] In the figure:

[0029] 10-base; 11-handle; 12-first connecting slot; 13-limiting slot; 14-card slot;

[0030] 20-supporting part; 21-support; 211-first adjusting hole; 22-accommodating groove; 23-limiting member; 231-abutting piece; 232-positioning piece; 233-second adjusting hole; 24-connecting member; 241-second connecting groove; 242-locking member; 25-connecting shaft; 26-supporting member;

[0031] 30-flange fixing part; 31-fixing seat; 311-positioning column; 32-clamping piece; 321-adjusting seat; 33-sliding seat; 331-sliding block; 332-stop rod; 34-base; 341-sliding groove; 342-stopper; 35-limiting seat; 351-stop groove;

[0032] 40-positioning part; 41-connecting seat; 411-positioning hole; 42-positioning piece; 421-adjusting rod; 422-set; 423-set hole;

[0033] 50-exhaust pipe; 51-pipe body; 511-connecting end; 512-free end; 52-connecting flange; 521-welding stud. DETAILED DESCRIPTION

[0034] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0037] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0038] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0039] As attached Figure 1 As shown, the exhaust pipe welding device proposed in the utility model includes a base 10, on which a supporting portion 20, a flange fixing portion 30, a positioning portion 40 and an adjusting portion are provided. The supporting portion 20 is detachably mounted on the base 10 through the adjusting portion. Figure 2 The supporting portion 20 is used to place the pipe body 51 of the exhaust pipe 50. The pipe body 51 includes a connecting end 511 and a free end 512. The connecting end 511 is used for welding the connecting flange 52. The flange fixing portion 30 is detachably mounted on the base 10 through the adjusting portion. The flange fixing portion 30 is used to fix the connecting flange 52 to be welded so that the connecting flange 52 cooperates with the connecting end 511 of the pipe body 51. The positioning portion 40 is detachably mounted on the base 10 through the adjusting portion. The positioning portion 40 is used to fix the free end 512 of the pipe body 51 so that the pipe body 51 can be stably and reliably fixed on the supporting portion 20 to prevent the pipe body 51 from shaking or tilting during the welding process and affecting the welding quality of the connecting flange 52. The adjusting portion is used to make the positions of the supporting portion 20, the flange fixing portion 30 and the positioning portion 40 adjustable relative to the base 10 to adjust the position according to the specifications and shape of the pipe body 51, and has good applicability.

[0040] Optional, as attached Figure 1 As shown, a handle 11 is provided on the base 10, and an operator can carry the base 10 by means of the handle 11, which is convenient for operation.

[0041] To facilitate understanding of the positional relationship and connection relationship of the various components in the utility model, as shown in the attached Figure 1As shown, the front-to-back direction is defined along the X-axis, wherein the direction indicated by the arrow is the back, the left-right direction is defined along the Y-axis, wherein the direction indicated by the arrow is the right, and the up-down direction is defined along the Z-axis, wherein the direction indicated by the arrow is the top. The aforementioned coordinate system is intended to illustrate a possible embodiment of the utility model, and does not mean that the various components of the utility model can only be arranged in this orientation. Those skilled in the art can flexibly select the position of each component according to actual needs.

[0042] In one embodiment, in combination with Figure 1 and attached Figure 3 The supporting portion 20 includes a support 21, and a receiving groove 22 is opened at the upper end of the support 21. The receiving groove 22 is opened along the left-right direction and passes through the left and right end surfaces of the support 21. The tube body 51 is partially received in the receiving groove 22. A limit member 23 is detachably installed in the receiving groove 22. The limit member 23 is used to adjust the notch size of the receiving groove 22 so that the receiving groove 22 can adapt to tube bodies 51 of different diameters.

[0043] For ease of understanding, the slot size of the above-mentioned receiving slot 22 refers to the accommodating area of ​​the positive projection of the receiving slot 22 in the axial direction of the tube body 51 when the central axis of the tube body 51 is installed in the receiving slot 22 along the left-right direction. The limit member 23 is used to adjust the accommodating area of ​​the receiving slot 22.

[0044] Optionally, the number of supports 21 can be freely selected according to the length of the tube body 51 .

[0045] In an exemplary embodiment, the stopper 23 includes an abutment piece 231 and positioning pieces 232 located at the left and right ends of the abutment piece 231, the positioning piece 232 extends in the front-to-back direction, the abutment piece 231 is detachably mounted on the groove wall of the receiving groove 22, and is located inside the receiving groove 22, the abutment piece 231 is used to contact the outer wall of the tube body 51 to change the notch size of the receiving groove 22, so that the tube body 51 can be stably and firmly placed in the receiving groove 22, and the positioning piece 232 is used to contact the left and right ends of the support 21 to achieve a quick positioning connection between the abutment piece 231 and the support 21, which is conducive to improving the installation efficiency of the abutment piece 231 installed in the receiving groove 22. According to the diameter size of the tube body 51, the stopper 23 of different specifications can be replaced to change the notch size of the receiving groove 22, so that the receiving groove 22 can be suitable for different tube bodies 51.

[0046] Optional, combined with Figure 3 and attached Figure 4The support 21 is provided with a first adjustment hole 211, the first adjustment hole 211 is communicated with the receiving groove 22, the abutment sheet 231 is provided with a second adjustment hole 233 that cooperates with the first adjustment hole 211, and the first adjustment hole 211 cooperates with the second adjustment hole 233 to realize the detachable connection between the stopper 23 and the support 21. Optionally, the first adjustment hole 211 and the second adjustment hole 233 are both set as screw holes, and the stopper 23 and the support 21 are detachably connected by screw connection.

[0047] Optional, combined with Figure 3 and attached Figure 4 The limit member 23 is installed on at least one of the front groove wall, the rear groove wall and the lower groove wall of the accommodating groove 22. Those skilled in the art can adjust the position of the first adjustment hole 211 according to actual needs to adjust the adaptability of the accommodating groove 22 according to the specifications of the tube body 51.

[0048] In one embodiment, in combination with Figure 3 and attached Figure 4 The adjusting part includes a connecting member 24, a plurality of first connecting grooves 12 are formed on the base 10, a second connecting groove 241 is formed on the connecting member 24, the second connecting groove 241 penetrates the connecting member 24 in the up and down direction, and the second connecting groove 241 cooperates with the first connecting groove 12 to realize connection.

[0049] Optionally, the first connecting groove 12 and the second connecting groove 241 are set as screw holes, and the number of the first connecting grooves 12 is greater than the number of the second connecting grooves 241. According to actual needs, an appropriate number of connecting parts 24 can be installed on the base 10. According to the fixing requirements of the tube body 51, the position of the connecting part 24 relative to the base 10 can be adjusted, thereby changing the position of the supporting part 20, the flange fixing part 30 and the positioning part 40 on the base 10.

[0050] When the adjustment part is connected to the supporting part 20, the connecting piece 24 is connected to the lower end of the support 21, and the support 21 is detachably mounted on the base 10 through the connecting piece 24. The position and number of the support 21 on the base 10 can be adjusted according to the shape of the tube 51, so that the supporting part 20 has good applicability. Optionally, the connecting piece 24 and the support 21 are detachably connected by screw connection.

[0051] In an example scenario, as shown in the attached Figure 4As shown, a limiting groove 13 is provided at the upper end of the base 10, and the limiting groove 13 cooperates with the connecting member 24. The connecting member 24 is at least partially accommodated in the limiting groove 13, and the connecting member 24 can rotate around its own axis in the limiting groove 13. The first connecting groove 12 is provided at the bottom of the limiting groove 13, and the second connecting groove 241 penetrates the connecting member 24 along the up and down directions. The orthographic projection of the second connecting groove 241 in the up and down directions can be located in the first connecting groove 12. The connecting member 24 can be fixed to the limiting groove 13 by a locking member 242. The locking member 242 is installed in the second connecting groove 241 from top to bottom. The end of the locking member 242 passes through the second connecting groove 241 and enters the first connecting groove 12 to apply force to the bottom of the first connecting groove 12, thereby fixing the connecting member 24.

[0052] The operator can apply external force to the connecting member 24 to rotate the connecting member 24 in the limiting groove 13, thereby changing the angle of the connecting member 24 relative to the base 10. When the connecting member 24 is adjusted to the desired angle, the operator fixes the connecting member 24 with the locking member 242 to complete the adjustment.

[0053] Optionally, the orthographic projection of the connecting member 24 in the up-down direction is circular, and the orthographic projection of the limiting groove 13 in the up-down direction is circular, so as to ensure that the angle adjustment of the connecting member 24 is convenient.

[0054] Optionally, the second connecting groove 241 is configured as a threaded groove, and the locking member 242 is a bolt.

[0055] In an example scenario, as shown in the attached Figure 4 As shown, the adjustment part also includes a connecting shaft 25 and a bracket 26 located at the lower end of the connecting shaft 25. An axial hole cooperating with the connecting shaft 25 is opened on the base 10, and the axial hole penetrates the base 10 in the up and down directions. One end of the connecting shaft 25 is connected to the lower end of the connecting member 24, and the other end passes through the axial hole and is connected to the bracket 26. A slot 14 cooperating with the bracket 26 is opened at the lower end of the base 10, and the limiting slot 13 is connected with the slot 14 through the axial hole. The bracket 26 is located at the lower end of the base 10 and is accommodated in the slot 14. The connecting shaft 25 can rotate in the axial hole, and the bracket 26 can rotate in the slot 14 to ensure the stability of the rotation of the connecting member 24.

[0056] Optionally, the depth of the slot 14 in the up-down direction is greater than or equal to the height of the bracket 26 in the up-down direction.

[0057] In one embodiment, in combination with Figure 5 and attached Figure 6 The flange fixing part 30 includes a fixing seat 31 and a clamping member 32. The fixing seat 31 is used to place the connecting flange 52. The clamping member 32 is used to fix the connecting flange 52 to the fixing seat 31. A positioning column 311 is convexly provided on one side of the fixing seat 31 close to the connecting end 511 of the tube body 51. Figure 2 The positioning column 311 is provided with an opening that cooperates with the welding stud 521 of the connecting flange 52. When the connecting flange 52 is placed on the fixing seat 31, the welding stud 521 is passed through the opening of the positioning column 311. In this way, the connecting flange 52 can be quickly positioned so that the clamping member 32 can fix the connecting flange 52.

[0058] Optionally, the fixing seat 31 is provided with a plurality of holes that cooperate with the positioning posts 311 , and the position of the positioning posts 311 relative to the fixing seat 31 can be adjusted according to the position of the welding studs 521 of the connecting flange 52 to improve applicability.

[0059] Optionally, an adjustment seat 321 is detachably mounted on the fixed seat 31, and the clamping member 32 is mounted on the adjustment seat 321. The position of the adjustment seat 321 relative to the fixed seat 31 can be adjusted to achieve position adjustment of the clamping member 32, so as to be suitable for fixing connecting flanges 52 of different specifications. Optionally, the adjustment seat 321 is detachably mounted on the fixed seat 31 by screwing.

[0060] Optionally, the clamping member 32 is a quick clamp, the number of the clamping members 32 is set to two, and the clamping positions thereof correspond to the positioning columns 311 , so as to clamp the connecting flange 52 on the fixing seat 31 .

[0061] When the adjustment part is connected to the flange fixing part 30, the connector 24 is connected to the lower end of the fixing seat 31, and the fixing seat 31 is detachably mounted on the base 10 through the connector 24. The position of the fixing seat 31 relative to the connecting end 511 can be adjusted according to the position of the connecting end 511 of the tube body 51, thereby adjusting the position of the connecting flange 52. Optionally, the connector 24 and the fixing seat 31 are detachably connected by screw connection.

[0062] In another embodiment, in combination with Figure 5 and attached Figure 6 The flange fixing portion 30 also includes a slide 33 and a base 34. The slide 33 is connected to the fixing seat 31, and the slide 33 is movably installed on the base 34. The slide 33 can drive the fixing seat 31 to move closer to and / or away from the connecting end 511 of the tube body 51 relative to the base 34, so as to adjust the position of the connecting flange 52 according to the specifications of the tube body 51.

[0063] Optionally, the sliding seat 33 and the fixing seat 31 are connected by screwing, or are integrally formed.

[0064] Optionally, the sliding seat 33 is vertically connected to the fixing seat 31 .

[0065] Optionally, a slider 331 is protruding from one of the slide seat 33 and the base 34 , and a slide groove 341 cooperating with the slider 331 is opened on the other one, and the slider 331 is slidably arranged in the slide groove 341 to ensure the relative movement stability between the slide seat 33 and the base 34 .

[0066] Optionally, a stopper 342 is protruded from one side of the base 34 close to or away from the connecting end 511 of the tube body 51, and the height dimension of the stopper 342 in the up and down directions is greater than the height dimension of the slide 33 installed on the base 34, so as to limit the slide 33 and prevent it from falling off the base 34 during the adjustment process.

[0067] Optionally, a limit seat 35 is provided on one side of the base 34, and a plurality of stop grooves 351 are opened on the upper end of the limit seat 35. The plurality of stop grooves 351 are adjacently distributed along the extension direction of the slider 331 or the slide groove 341. A stop rod 332 cooperating with the stop groove 351 is convexly provided on the slide 33. The stop rod 332 is rotatably installed on the slide 33 through a rotating shaft so that the stop rod 332 can move toward and / or away from the limit seat 35 in the up and down directions. By clamping the stop rod 332 in the stop grooves 351 at different positions, the slide 33 can be fixed at different positions so that the position of the slide 33 and the base 34 is fixed.

[0068] When the position of the slide 33 needs to be adjusted, the blocking rod 332 is lifted upward from the stop groove 351, and then the slide 33 is slid. When the slide 33 is adjusted to a suitable position, the blocking rod 332 is rotated downward until it is locked in the stop groove 351, so that the slide 33 can be fixed.

[0069] When the adjustment part is connected to the flange fixing part 30, the connector 24 is connected to the lower end of the base 34, and the base 34 is detachably mounted on the base 10 through the connector 24. The position and angle of the fixing seat 31 relative to the connecting end 511 can be adjusted according to the position and angle of the connecting end 511 of the tube body 51, thereby achieving the effect of adjusting the position of the connecting flange 52. Optionally, the connector 24 and the fixing seat 31 are detachably connected by screw connection.

[0070] Optionally, in order to ensure the fixing effect of the slide seat 33 , the limit seat 35 may be connected to the base 34 so that the angle of the limit seat 35 can change synchronously with that of the base 34 .

[0071] In one embodiment, as shown in the attached Figure 7As shown, the positioning portion 40 includes a connecting seat 41 and a positioning member 42 movably mounted on the connecting seat 41. The connecting seat 41 is provided with a positioning hole 411, and the positioning hole 411 penetrates the connecting seat 41 in the left-right direction. The positioning member 42 includes an adjusting rod 421 and a sleeve 422. One end of the adjusting rod 421 is connected to the sleeve 422. The adjusting rod 421 is inserted into the positioning hole 411 and can move closer to and / or away from the free end 512 of the tube body 51 relative to the positioning hole 411. Movement, a sleeve hole 423 is opened on one side of the sleeve 422 close to the free end 512 of the tube body 51, and the sleeve hole 423 matches the outer diameter of the tube body 51. When the tube body 51 is placed in the accommodating groove 22 of the supporting portion 20, the position of the sleeve 422 relative to the free end 512 of the tube body 51 can be adjusted by adjusting the position of the adjusting rod 421 relative to the connecting seat 41, so that the sleeve 422 can be sleeved on the free end 512 of the tube body 51 to achieve the positioning of the tube body 51.

[0072] When the adjusting portion is connected to the positioning portion 40, the connecting piece 24 is connected to the lower end of the connecting seat 41. The connecting seat 41 is detachably mounted on the base 10 through the connecting piece 24. The position of the connecting seat 41 relative to the base 10 can be adjusted according to the position of the free end 512 of the tube body 51, so that the kit 422 can be sleeved on the free end 512 of the tube body 51 to prevent the tube body 51 from moving during welding, thereby ensuring the welding quality of the connecting flange 52.

[0073] The exhaust pipe welding device of the utility model is provided with a supporting part 20, which is used to place the pipe body 51 of the exhaust pipe 50. The supporting part 20 is detachably mounted on the base 10 through the adjusting part, so that the position of the supporting part 20 can be adjusted according to the specifications and shape of the pipe body 51, so as to facilitate fixing the pipe body 51.

[0074] By providing the flange fixing portion 30, the flange fixing portion 30 can fix the connecting flange 52 of the connecting end 511 of the pipe body 51, so as to facilitate welding the connecting flange 52 to the pipe body 51, and the position of the flange fixing portion 30 is adjusted by the adjusting portion to fix the connecting flange 52 according to the position of the connecting end 511;

[0075] The positioning portion 40 is provided to fix the free end 512 of the tube body 51 to prevent the free end 512 from shifting during welding. The positioning portion 40 can cooperate with the flange fixing portion 30, which is beneficial to improving the welding quality of the connecting flange 52. The position of the positioning portion 40 can be adjusted by the adjusting portion to adjust the position of the positioning portion 40 according to the specifications and shape of the tube body 51.

[0076] The entire welding device has a simple structure and is easy to adjust. The positions of the supporting portion 20 , the flange fixing portion 30 and the positioning portion 40 can be adjusted according to exhaust pipes 50 of different specifications. It has good applicability and is conducive to ensuring the welding quality of the connecting flange 52 .

[0077] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust pipe welding device, characterized in that: The invention comprises a base (10), on which a supporting part (20), a flange fixing part (30), a positioning part (40) and an adjusting part are installed. The supporting part (20), the flange fixing part (30) and the positioning part (40) are detachably installed on the base (10) through the adjusting part. The adjusting part enables the supporting part (20), the flange fixing part (30) and the positioning part (40) to change their positions relative to the base (10). The supporting part (20) is used to place a tube body (51) of an exhaust pipe (50), the flange fixing part (30) is used to fix a connecting flange (52) of the exhaust pipe (50), and the positioning part (40) is used to fix a free end (512) of the tube body (51).

2. The exhaust pipe welding device according to claim 1, characterized in that: The supporting portion (20) comprises a support (21), the upper end of the support (21) is provided with a receiving groove (22), the receiving groove (22) is opened in the left-right direction and passes through the left and right end surfaces of the support (21), the tube body (51) is partially received in the receiving groove (22), a limiting member (23) is detachably installed in the receiving groove (22), and the limiting member (23) is used to adjust the notch size of the receiving groove (22).

3. The exhaust pipe welding device according to claim 2, characterized in that: The limiting member (23) comprises a contact piece (231) and positioning pieces (232) located at left and right ends of the contact piece (231), the positioning piece (232) extending in the front-back direction, the contact piece (231) being detachably mounted on the groove wall of the accommodating groove (22), the contact piece (231) being used to contact the tube body (51), and the positioning piece (232) being used to contact left and right ends of the support (21).

4. The exhaust pipe welding device according to claim 1, characterized in that: The flange fixing portion (30) comprises a fixing seat (31) and a clamping member (32); a positioning column (311) is protrudingly provided on one side of the fixing seat (31) close to the connecting end (511) of the tube body (51); an opening is provided on the positioning column (311) for matching with a welding stud (521) of the connecting flange (52); the welding stud (521) is passed through the opening; and the clamping member (32) is used to fix the connecting flange (52) to the fixing seat (31).

5. The exhaust pipe welding device according to claim 4, characterized in that: The flange fixing portion (30) further comprises a slide seat (33) and a base (34); the slide seat (33) is connected to the fixing seat (31), and the slide seat (33) is movably mounted on the base (34); the slide seat (33) can move relative to the base (34) toward and / or away from the connecting end (511) of the tube body (51).

6. The exhaust pipe welding device according to claim 5, characterized in that: A limit seat (35) is provided on one side of the base (34), and a plurality of stop grooves (351) are provided on the limit seat (35). A stop rod (332) cooperating with the stop groove (351) is installed on the slide seat (33), and the stop rod (332) can move toward and / or away from the limit seat (35), and the stop rod (332) can be clamped in the stop groove (351).

7. The exhaust pipe welding device according to claim 1, characterized in that: The positioning portion (40) comprises a connecting seat (41) and a positioning member (42); the positioning member (42) comprises an adjusting rod (421) and a sleeve (422); the connecting seat (41) is provided with a positioning hole (411) for passing the adjusting rod (421); the adjusting rod (421) can move in the positioning hole (411) toward and / or away from the free end (512) of the tube body (51); one end of the adjusting rod (421) is connected to the sleeve (422); the sleeve (422) comprises a sleeve hole (423) matched with the outer diameter of the tube body (51); and the sleeve (422) can be sleeved on the free end (512) of the tube body (51).

8. The exhaust pipe welding device according to any one of claims 1, 2, 4 and 7, characterized in that: The base (10) is provided with a plurality of first connecting grooves (12); the adjusting portion comprises a connecting member (24); the connecting member (24) is provided with a second connecting groove (241) that matches the first connecting groove (12); the first connecting groove (12) and the second connecting groove (241) are matched and connected.

9. The exhaust pipe welding device according to claim 8, characterized in that: The upper end of the base (10) is provided with a limiting groove (13) which cooperates with the connecting member (24); the first connecting groove (12) is provided at the bottom of the limiting groove (13); the connecting member (24) is at least partially installed in the limiting groove (13) and can rotate around its own axis in the limiting groove (13); the second connecting groove (241) penetrates the connecting member (24) in the up-down direction; the orthographic projection of the second connecting groove (241) in the up-down direction can be located in the first connecting groove (12); and the connecting member (24) can be fixed to the limiting groove (13) by a locking member (242).

10. The exhaust pipe welding device according to claim 9, characterized in that: The adjusting portion further comprises a connecting shaft (25) and a supporting member (26); an axial hole cooperating with the connecting shaft (25) and a clamping groove (14) cooperating with the supporting member (26) are provided on the base (10); the clamping groove (14) is provided at the lower end of the base (10); one end of the connecting shaft (25) is connected to the lower end of the connecting member (24); the other end passes through the axial hole and is connected to the supporting member (26); the supporting member (26) is rotatably accommodated in the clamping groove (14).

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