Portable support for metal jig welding

Abstract

The invention relates to the technical field of welding, and discloses a portable support for metal jig welding, the portable support comprises a portable support body provided with a metal annular jig, and a side extension plate is fixedly arranged on the portable support body. The waste gas generated by welding can be collected in a centralized manner, can be cooled under the cooperation of the cooling assembly, and then is discharged under the filtration of the filter element body, so that the effect of cooling a welding part by using the waste gas after the waste gas is filtered can be achieved, and by collecting and reusing the waste gas, the welding quality is improved. Harmful substances discharged to the atmosphere can be remarkably reduced, so that pollution to the environment is reduced, air flowing in the area can be accelerated by pumping away air in the welding position, the convection effect is formed, hot air is pumped away, cold air is continuously supplemented, and therefore part of heat of the welding position is taken away, and preliminary cooling is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a portable bracket for welding metal fixtures. Background Art

[0002] A fixture is a large category of tools for carpentry, ironworking, fitter work, machinery, electronic control, and other handicrafts. It is mainly a tool for assisting in controlling position or movement. Fixtures can be divided into three categories: process assembly fixtures, project test fixtures, and circuit board test fixtures; In the patent application with the application publication number CN217045181U, it includes a bottom plate. Two installation grooves are provided on the bottom plate. One end of the two installation grooves is rotatably connected to the bottom plate, and the openings of the two installation grooves are close to each other; two ear plates are fixed on the bottom plate. The two ear plates are respectively located outside the two installation grooves, and a double-threaded screw rod is rotatably installed between the two ear plates. Both ends of the double-threaded screw rod are threadedly connected with installation blocks. A connecting rod is rotatably installed on each of the two installation blocks, and the tops of the two connecting rods are respectively rotatably connected to the two installation grooves. By installing the two parts of the fixture in the installation grooves respectively and rotating the double-threaded screw rod, the angle between the two parts can be adjusted to adapt to the processing angle, so as to facilitate the welding operation and improve the welding efficiency.

[0003] In the prior art including the above patents, among many fixtures, there are fixtures for positioning large pipelines such as metal bellows or municipal sewage pipes. The shape of this fixture is annular. When welding this positioning fixture, and to ensure the welding efficiency, a portable bracket is usually used to load and position the fixture, and it is welded with a welding gun. In the existing welding steps, natural cooling is usually used when cooling the metal fixture. The weld and the surrounding area will experience high temperatures. If the cooling speed is too slow, it will cause poor microstructure in the heat-affected zone, such as coarse grains, formation of precipitation phases, etc. These changes in microstructure will directly affect the mechanical properties and corrosion resistance of the weld. Summary of the Invention

[0004] The problem to be solved by the present invention is that it is difficult for the existing portable bracket to cool down the welding part of the fixture.

[0005] To solve the above technical problems, the technical solution of the present invention is: a portable bracket for welding metal fixtures, including a portable bracket body equipped with a metal annular fixture. A side extension plate is fixedly arranged on the portable bracket body, and an exhaust gas collection component is arranged on the side extension plate; The waste gas collection component includes an integrated refrigeration cylinder fixed on the side extension plate. An installation cylinder is fixedly arranged on the inner wall of the integrated refrigeration cylinder. A re-blowing pipe is fixedly arranged on the arc-shaped outer wall of the integrated refrigeration cylinder, and one end of the re-blowing pipe is communicated with the inside of the integrated refrigeration cylinder. An installation frame is fixedly arranged on the integrated refrigeration cylinder. A motor body is installed on the installation frame. The output end of the motor body is connected with a rotating shaft through a coupling. A first pulley is fixedly arranged at one end of the rotating shaft. A cooling component is arranged on the installation cylinder; The cooling component includes a tooth fan fixed on the first pulley. A square rack is slidably arranged on the installation frame. Two inner racks meshing with the tooth fan are fixedly arranged on the inner wall of the square rack. An outer rack is fixedly arranged on the outer wall of the square rack. A guiding ring is rotatably arranged on the inner wall of the integrated refrigeration cylinder. A sector gear ring meshing with the outer rack is fixedly arranged on the guiding ring. Two limiting rings are fixedly arranged on the inner wall of the integrated refrigeration cylinder, and the two limiting rings are respectively located at both ends of the integrated refrigeration cylinder. A pair of first cooling plates are slidably arranged between the two limiting rings. A pair of second cooling plates are slidably arranged between the two limiting rings. A first guiding rod slidably connected with the two limiting rings is fixedly arranged on one side of each first cooling plate. A second guiding rod slidably connected with the two limiting rings is fixedly arranged on the other side of each first cooling plate. A first guiding column slidably connected with the two limiting rings is fixedly arranged on one side of each second cooling plate. A second guiding column slidably connected with the two limiting rings is fixedly arranged on the other side of each second cooling plate. The bottoms of the two first guiding rods are slidably connected with the top of the guiding ring. The bottoms of the two first guiding columns are slidably connected with the top of the guiding ring.

[0006] Preferably, the two inner racks are circumferentially arrayed about the rotating shaft. A reciprocating chute matching with the square rack is formed on the installation frame.

[0007] Preferably, four straight chutes matching with the two first guiding rods and the two first guiding columns are formed on each limiting ring, and the four straight chutes are annularly arrayed on each limiting ring. Four arc-shaped chutes matching with the two second guiding rods and the two second guiding columns are formed on each limiting ring, and the four arc-shaped chutes are annularly arrayed on each limiting ring.

[0008] Preferably, two first guiding grooves matching with the two first guiding rods are formed on the guiding ring. Two second guiding grooves matching with the two first guiding columns are formed on the guiding ring. A plurality of semiconductor refrigerating sheets are installed on the arc-shaped inner wall of the integrated refrigeration cylinder.

[0009] Preferably, a fan shaft is rotatably connected to the inner wall of the secondary blowing pipe. A second belt loop is fixedly connected to the arc-shaped outer wall of the fan shaft. A belt body is sleeved between the first pulley and the second belt loop. A fan body is fixedly arranged on the arc-shaped outer wall of the fan shaft on one side of the second belt loop. A filter element body is arranged at one end of the secondary blowing pipe.

[0010] Preferably, two movable holes matching the belt body are formed in the arc-shaped outer wall of the secondary blowing pipe. Two limiting sleeves are sleeved on the arc-shaped outer wall of the fan shaft, and both limiting sleeves are fixedly connected to the inner wall of the secondary blowing pipe.

[0011] Preferably, a pair of cooling pipes are arranged on the two first cooling plates, and another pair of cooling pipes are arranged on the two second cooling plates.

[0012] Preferably, a rotating hole matching the rotating shaft is formed in the mounting frame, and the motor body is fixedly connected to the mounting frame through bolts.

[0013] Preferably, an air inlet is formed at one end of the mounting cylinder, a mounting hole is formed at the other end of the mounting cylinder, an air outlet is formed at the other end of the secondary blowing pipe, and the air inlet is aligned with the welding position on the outer wall of the metal annular fixture.

[0014] Preferably, two receiving seats are fixedly arranged at the top of the portable support body, and the two receiving seats are in contact with the arc-shaped outer wall of the metal annular fixture.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) By starting the motor body and with the cooperation of the waste gas collection component, the waste gas generated by welding can be centrally collected. With the cooperation of the cooling component, the waste gas can be cooled, and then discharged under the filtration of the filter element body. It can play a role in cooling the welding part by filtering and reusing the waste gas. By collecting and reusing these waste gases, the harmful substances discharged into the atmosphere can be significantly reduced, thereby reducing environmental pollution. By pumping away the air at the welding part, the air flow in this area can be accelerated to form a convection effect. The hot air is pumped away, and the cold air is continuously replenished, thereby taking away part of the heat at the welding part to achieve preliminary cooling; (2) By starting the motor body and with the mutual cooperation of the exhaust gas collection component and the cooling component, the present invention enables the two first cooling plates and the two second cooling plates on the installation cylinder to alternately enter the interior of the installation cylinder. The two first cooling plates or the two second cooling plates located between the integrated refrigeration cylinder and the installation cylinder can be automatically cooled, thereby playing a role in cooling the exhaust gas drawn into the integrated refrigeration cylinder. At the same time, the two first cooling plates and the two second cooling plates alternately enter the interior of the installation cylinder, which can improve the continuity of cooling the air inside the installation cylinder, thereby improving the cooling efficiency inside the installation cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a front view structural schematic diagram of the portable bracket body of the present invention; Figure 3 is a schematic diagram of the exhaust gas collection component structure of the present invention; Figure 4 is a schematic diagram of the connection structure between the installation cylinder and the re-blowing pipe of the present invention; Figure 5 For the present invention Figure 4 Partial enlarged view of A in; Figure 6 is a schematic diagram of the connection structure between the first pulley and the second pulley of the present invention; Figure 7 is a schematic diagram of the cooling component structure of the present invention; Figure 8 For the present invention Figure 7 Partial enlarged view of B in; Figure 9 is a schematic diagram of the connection structure between the rotating shaft and the fan body of the present invention; Figure 10 is a schematic diagram of the connection structure between the first cooling plate and the second cooling plate and the guide disk of the present invention respectively; Figure 11 is a schematic diagram of the guide ring structure of the present invention; Figure 12 is a schematic diagram of the cooling pipe structure of the present invention.

[0017] In the figure: 1. Portable bracket body; 11. Metal circular fixture; 12. Side extension plate; 2. Exhaust gas collection component; 21. Integrated refrigeration cylinder; 22. Installation cylinder; 23. Re-blowing pipe; 231. Filter element body; 24. Motor body; 241. Installation frame; 25. Rotating shaft; 26. First pulley; 27. Belt body; 28. Second belt ring; 29. Fan shaft; 291. Fan body; 3. Cooling assembly; 31. Return-shaped rack; 311. Inner rack; 312. Tooth fan; 32. Outer rack; 33. Sector gear ring; 34. Guide ring; 341. First guide groove; 342. Second guide groove; 35. Limit ring; 351. Straight chute; 352. Arc chute; 36. First cooling plate; 361. First guide rod; 362. Second guide rod; 37. Second cooling plate; 371. First guide post; 372. Second guide post; 38. Cooling pipe. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms such as "including" or "comprising" used in the present disclosure mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] As Figures 1 to 12 shown, a portable bracket for metal fixture welding provided by the present invention includes a portable bracket body 1 equipped with a metal annular fixture 11. A side extension plate 12 is fixedly provided on the portable bracket body 1, and an exhaust gas collection assembly 2 is provided on the side extension plate 12; The exhaust gas collection assembly 2 includes an integrated refrigeration cylinder 21 fixed on the side extension plate 12. An installation cylinder 22 is fixedly provided on the inner wall of the integrated refrigeration cylinder 21. A re-blowing pipe 23 is fixedly provided on the arc-shaped outer wall of the integrated refrigeration cylinder 21, and one end of the re-blowing pipe 23 is communicated with the inside of the integrated refrigeration cylinder 21. An installation frame 241 is fixedly provided on the integrated refrigeration cylinder 21, and a motor body 24 is installed on the installation frame 241. The output end of the motor body 24 is connected to a rotating shaft 25 through a coupling. A first pulley 26 is fixedly provided at one end of the rotating shaft 25. A cooling assembly 3 is provided on the installation cylinder 22; The cooling assembly 3 includes a toothed fan 312 fixed to the first pulley 26. A loop-shaped rack 31 is slidably arranged on the mounting bracket 241. Two sets of inner racks 311 meshing with the toothed fan 312 are fixedly arranged on the inner wall of the loop-shaped rack 31. An outer rack 32 is fixedly arranged on the outer wall of the loop-shaped rack 31. A guide ring 34 is rotatably arranged on the inner wall of the integrated refrigeration cylinder 21. A sector gear ring 33 meshing with the outer rack 32 is fixedly arranged on the guide ring 34. Two limiting rings 35 are fixedly arranged on the inner wall of the integrated refrigeration cylinder 21, and the two limiting rings 35 are respectively located at both ends of the integrated refrigeration cylinder 21. A pair of first cooling plates 36 are slidably arranged between the two limiting rings 35. A pair of second cooling plates 37 are slidably arranged between the two limiting rings 35. On one side of each first cooling plate 36, a first guide rod 361 slidably connected to the two limiting rings 35 is fixedly arranged. On the other side of each first cooling plate 36, a second guide rod 362 slidably connected to the two limiting rings 35 is fixedly arranged. On one side of each second cooling plate 37, a first guide post 371 slidably connected to the two limiting rings 35 is fixedly arranged. On the other side of each second cooling plate 37, a second guide post 372 slidably connected to the two limiting rings 35 is fixedly arranged. The bottoms of the two first guide rods 361 are both slidably connected to the top of the guide ring 34. The bottoms of the two first guide posts 371 are both slidably connected to the top of the guide ring 34; The two inner racks 311 are circumferentially arrayed about the rotating shaft 25. A reciprocating chute matching the loop-shaped rack 31 is formed on the mounting bracket 241; On each limiting ring 35, four straight chutes 351 matching the two first guide rods 361 and the two first guide posts 371 are formed, and the four straight chutes 351 are annularly arrayed on each limiting ring 35. On each limiting ring 35, four arc-shaped chutes 352 matching the two second guide rods 362 and the two second guide posts 372 are formed, and the four arc-shaped chutes 352 are annularly arrayed on each limiting ring 35; Two first guide grooves 341 matching the two first guide rods 361 are formed on the guide ring 34. Two second guide grooves 342 matching the two first guide posts 371 are formed on the guide ring 34. A plurality of semiconductor refrigeration chips are installed on the arc-shaped inner wall of the integrated refrigeration cylinder 21; A fan shaft 29 is rotatably connected to the inner wall of the recirculation blowing pipe 23. A second belt ring 28 is fixedly connected to the arc-shaped outer wall of the fan shaft 29. A belt body 27 is sleeved between the first pulley 26 and the second belt ring 28. A fan body 291 is fixedly arranged on the arc-shaped outer wall of the fan shaft 29 on one side of the second belt ring 28. A filter element body 231 is arranged at one end of the recirculation blowing pipe 23; Two movable holes matching the belt body 27 are formed on the arc-shaped outer wall of the recirculation blowing pipe 23. Two limiting sleeves are sleeved on the arc-shaped outer wall of the fan shaft 29, and both of the two limiting sleeves are fixedly connected to the inner wall of the recirculation blowing pipe 23; A pair of cooling pipes 38 are provided on the two first cooling plates 36, and another pair of cooling pipes 38 are provided on the two second cooling plates 37; A rotation hole matching the rotating shaft 25 is formed on the mounting bracket 241, and the motor body 24 and the mounting bracket 241 are fixedly connected by bolts.

[0021] An air inlet is formed at one end of the mounting cylinder 22, a mounting hole is formed at the other end of the mounting cylinder 22, an air outlet hole is formed at the other end of the re-blowing pipe 23, and the air inlet is aligned with the welding position on the outer wall of the metal annular jig 11; Two receiving seats are fixedly arranged at the top of the portable bracket body 1, and the two receiving seats are in contact with the arc-shaped outer wall of the metal annular jig 11; When welding the metal annular jig 11 on the portable bracket body 1 is required, the welding gun can be inserted into the mounting cylinder 22, and then the welding gun is fixed to the mounting cylinder 22 by bolts. At this time, there is a certain gap between the output end of the welding gun and the air inlet of the mounting cylinder 22, and the other end of the welding gun is in contact with the mounting hole of the mounting cylinder 22. During the welding process, the motor body 24 can be started, and then driven by the connection of the rotating shaft 25, the first pulley 26 fixed to the end of the rotating shaft 25 can be driven to rotate. At this time, driven by the connection of the belt body 27, the second belt ring 28 can be driven to rotate, and at the same time, the fan shaft 29 can be driven to rotate around the connection position with the two limiting sleeves fixed to the inner wall of the re-blowing pipe 23, and the fan body 291 can be driven to rotate synchronously with the fan shaft 29. At this time, there is a negative pressure between the inside of the re-blowing pipe 23 and the inside of the mounting cylinder 22, so that the waste gas generated by welding can enter the re-blowing pipe 23 through the air inlet formed at the end of the mounting cylinder 22. At this time, the waste gas can be filtered by the filter element body 231 and discharged from the air outlet hole of the re-blowing pipe 23, which can play a role in collecting and filtering the waste gas. During this process, the rotation of the first pulley 26 can drive the tooth fan 312 fixed to the bottom of it to rotate. At this time, the tooth fan 312 can be engaged with the inner tooth rack 311 fixed to the inner wall of the loop-shaped rack 31 and located above the tooth fan 312, as Figure 5, the rotation of the gear segment 312 can drive the loop-shaped rack 31 to slide to the left. At this time, under the meshing action of the external rack 32 and the sector gear ring 33 fixed on the guide ring 34, the guide ring 34 can be driven to rotate around the connection position with the loop-shaped rack 31. At this time, the first guide posts 371 fixed on each second cooling plate 37 can slide inside the second guide groove 342. At the same time, the first guide posts 371 can be limited by the straight sliding grooves 351 opened on the limiting ring 35, and the second guide posts 372 fixed on the second cooling plate 37 can slide inside the arc-shaped sliding grooves 352 opened on the limiting ring 35, which can make the two second cooling plates 37 gradually slide into the installation cylinder 22. At the same time, the first guide rods 361 fixed on each first cooling plate 36 can slide inside the first guide groove 341. At the same time, the first guide rods 361 can be limited by the straight sliding grooves 351 opened on the limiting ring 35, and the second guide rods 362 fixed on the first cooling plate 36 can slide inside the arc-shaped sliding grooves 352 opened on the limiting ring 35, which can make the two first cooling plates 36 gradually slide to the outside of the installation cylinder 22. At this time, the air between the installation cylinder 22 and the integrated refrigeration cylinder 21 can be in a relatively low temperature state under the cooperation of the semiconductor refrigeration sheet. At this time, this part of the air can absorb the temperature on the surface of the cooling pipe 38 on the first cooling plate 36, which can play a role in reducing the temperature inside the installation cylinder 22. And at the same time, the cooling pipes 38 on the two second cooling plates 37 can absorb the temperature in the waste gas inhaled by the installation cylinder 22 to cool the waste gas. With the continuous output of the motor body 24, the temperature-lower gas can be discharged from the re-blowing pipe 23. At this time, the cold air discharged from the re-blowing pipe 23 can cool the welded part.

[0022] Working principle and usage process of the present invention: First, insert the welding gun into the interior of the mounting cylinder 22, and then fix the welding gun to the mounting cylinder 22 with bolts. At this time, there is a certain gap between the output end of the welding gun and the air inlet of the mounting cylinder 22, and the other end of the welding gun fits with the mounting hole of the mounting cylinder 22. During the welding process, the motor body 24 can be started, and then driven by the connection of the rotating shaft 25, the first pulley 26 fixed to the end of the rotating shaft 25 can be driven to rotate. At this time, driven by the connection of the belt body 27, the second belt ring 28 can be driven to rotate, and at the same time, the fan shaft 29 can rotate around the connection position with the two limit sleeves fixed to the inner wall of the double-blowing pipe 23, and the fan body 291 can rotate synchronously with the fan shaft 29. At this time, there is a negative pressure between the interior of the double-blowing pipe 23 and the interior of the mounting cylinder 22, so that the waste gas generated by welding can enter the interior of the double-blowing pipe 23 through the air inlet opened at the end of the mounting cylinder 22. At this time, the waste gas can be filtered by the filter element body 231 and discharged from the air outlet holes of the double-blowing pipe 23. During this process, the rotation of the first pulley 26 can drive the tooth fan 312 fixed to its bottom end to rotate. At this time, the tooth fan 312 can engage with the inner tooth rack 311 fixed to the inner wall of the loop-shaped rack 31 above the tooth fan 312. The rotation of the tooth fan 312 can drive the loop-shaped rack 31 to slide to one side. At this time, driven by the engagement of the outer tooth rack 32 and the sector tooth ring 33 fixed to the guide ring 34, the guide ring 34 can be driven to rotate around the connection position with the loop-shaped rack 31. At this time, the first guide posts 371 fixed to each second cooling plate 37 can slide inside the second guide groove 342. At the same time, the first guide posts 371 can be limited by the straight sliding grooves 351 opened on the limit ring 35, and the second guide posts 372 fixed to the second cooling plates 37 can slide inside the arc-shaped sliding grooves 352 opened on the limit ring 35, so that the two second cooling plates 37 can gradually slide into the interior of the mounting cylinder 22. At the same time, the first guide rods 361 fixed to each first cooling plate 36 can slide inside the first guide groove 341. At the same time, the first guide rods 361 can be limited by the straight sliding grooves 351 opened on the limit ring 35, and the second guide rods 362 fixed to the first cooling plates 36 can slide inside the arc-shaped sliding grooves 352 opened on the limit ring 35, so that the two first cooling plates 36 can gradually slide to the outside of the mounting cylinder 22. At this time, the air between the mounting cylinder 22 and the integrated refrigeration cylinder 21 can be in cooperation with the semiconductor refrigeration sheet, so that the temperature of this part of the air is in a relatively low state. At this time, this part of the air can absorb the temperature on the surface of the cooling pipes 38 on the first cooling plates 36, which can play a role in reducing the temperature inside the mounting cylinder 22. And at the same time, the cooling pipes 38 on the two second cooling plates 37 can absorb the temperature in the waste gas inhaled by the mounting cylinder 22, and can cool down the waste gas. With the continuous output of the motor body 24, the double-blowing pipe 23 can discharge gas with a lower temperature. At this time, the cold air discharged from the double-blowing pipe 23 can cool down the welded part.

[0023] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A portable bracket for welding metal jigs, comprising a portable bracket body (1) equipped with a metal ring jig (11), characterized in that: A side extension plate (12) is fixedly arranged on the portable bracket body (1), and an exhaust gas collecting assembly (2) is arranged on the side extension plate (12); The exhaust gas collection component (2) comprises an integrated refrigeration cylinder (21) fixed on the side extension plate (12); a mounting cylinder (22) is fixedly arranged on the inner wall of the integrated refrigeration cylinder (21); a re-blowing pipe (23) is fixedly arranged on the arc-shaped outer wall of the integrated refrigeration cylinder (21); one end of the re-blowing pipe (23) is connected to the inside of the integrated refrigeration cylinder (21); a mounting frame (241) is fixedly arranged on the integrated refrigeration cylinder (21); a motor body (24) is mounted on the mounting frame (241); an output end of the motor body (24) is connected to a rotating shaft (25) via a coupling; a first pulley (26) is fixedly arranged on one end of the rotating shaft (25); and a cooling component (3) is arranged on the mounting cylinder (22); The cooling assembly (3) comprises a toothed fan (312) fixed on the first pulley (26); a circular rack (31) is slidably arranged on the mounting frame (241); two groups of inner racks (311) meshing with the toothed fan (312) are fixedly arranged on the inner wall of the circular rack (31); an outer rack (32) is fixedly arranged on the outer wall of the circular rack (31); a guide ring (34) is rotatably arranged on the inner wall of the integrated refrigeration cylinder (21); a fan-shaped toothed ring (33) meshing with the outer rack (32) is fixedly arranged on the guide ring (34); two limit rings (35) are fixedly arranged on the inner wall of the integrated refrigeration cylinder (21), and the two limit rings (35) are respectively located at two ends of the integrated refrigeration cylinder (21); a pair of first cooling plates (36) are slidably arranged between the two limit rings (35); the two limit rings A pair of second cooling plates (37) are slidably arranged between the two limiting rings (35), each of the first cooling plates (36) is fixedly provided with a first guide rod (361) slidably connected to the two limiting rings (35) on one side, each of the first cooling plates (36) is fixedly provided with a second guide rod (362) slidably connected to the two limiting rings (35) on the other side, each of the second cooling plates (37) is fixedly provided with a first guide column (371) slidably connected to the two limiting rings (35) on one side, each of the second cooling plates (37) is fixedly provided with a second guide column (372) slidably connected to the two limiting rings (35) on the other side, the bottom ends of the two first guide rods (361) are slidably connected to the top of the guide ring (34), and the bottom ends of the two first guide columns (371) are slidably connected to the top of the guide ring (34).

2. The portable bracket for metal jig welding according to claim 1, characterized in that: The two inner racks (311) are arranged in a circular array about the rotating shaft (25), and a reciprocating slide groove matching the circular rack (31) is provided on the mounting frame (241).

3. The portable bracket for metal jig welding according to claim 1, characterized in that: Each of the limiting rings (35) is provided with four straight slide grooves (351) matching the two first guide rods (361) and the two first guide columns (371), and the four straight slide grooves (351) are distributed in a ring array on each limiting ring (35), and each of the limiting rings (35) is provided with four arcuate slide grooves (352) matching the two second guide rods (362) and the two second guide columns (372), and the four arcuate slide grooves (352) are distributed in a ring array on each limiting ring (35).

4. The portable bracket for metal jig welding according to claim 1, characterized in that: The guide ring (34) is provided with two first guide grooves (341) matching the two first guide rods (361), the guide ring (34) is provided with two second guide grooves (342) matching the two first guide columns (371), and a plurality of semiconductor refrigeration plates are installed on the arc-shaped inner wall of the integrated refrigeration cylinder (21).

5. The portable bracket for metal jig welding according to claim 1, characterized in that: A fan shaft (29) is rotatably connected to the inner wall of the re-blowing pipe (23); a second belt ring (28) is fixedly connected to the arc-shaped outer wall of the fan shaft (29); a belt body (27) is sleeved between the first belt pulley (26) and the second belt ring (28); a fan body (291) is fixedly arranged on the arc-shaped outer wall of the fan shaft (29) at one side of the second belt ring (28); and a filter element body (231) is arranged at one end of the re-blowing pipe (23).

6. The portable bracket for metal jig welding according to claim 5, characterized in that: Two movable holes matching the belt body (27) are provided on the arc-shaped outer wall of the re-blowing pipe (23), and two limit sleeves are sleeved on the arc-shaped outer wall of the fan shaft (29), and the two limit sleeves are fixedly connected to the inner wall of the re-blowing pipe (23).

7. The portable bracket for metal jig welding according to claim 1, characterized in that: A pair of cooling tubes (38) are provided on the two first cooling plates (36), and another pair of cooling tubes (38) are provided on the two second cooling plates (37).

8. The portable bracket for metal jig welding according to claim 1, characterized in that: The mounting frame (241) is provided with a rotation hole matching the rotating shaft (25), and the motor body (24) and the mounting frame (241) are fixedly connected by bolts.

9. The portable bracket for metal jig welding according to claim 1, characterized in that: An air inlet is provided at one end of the installation tube (22), a mounting hole is provided at the other end of the installation tube (22), and an air outlet is provided at the other end of the re-blowing pipe (23), wherein the air inlet is aligned with a welding position of the outer wall of the metal ring fixture (11).

10. The portable bracket for metal jig welding according to claim 1, characterized in that: Two receiving seats are fixedly arranged on the top of the portable bracket body (1), and the two receiving seats are in contact with the arc-shaped outer wall of the metal ring fixture (11).

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