Heating and ventilation pipe welding auxiliary device for heating and ventilation construction

Abstract

The utility model belongs to the technical field of welding auxiliary devices, and particularly relates to a heating and ventilation pipe welding auxiliary device for heating and ventilation construction, which comprises a bottom plate, adjusting components are symmetrically arranged at the top of the bottom plate, supporting plates are symmetrically arranged on the bottom plate, supporting cylinders are fixedly mounted on the supporting plates, positioning components are arranged on the supporting cylinders, and the positioning components are arranged on the supporting cylinders. An annular groove is fixedly formed in the side face of the supporting cylinder, a driving assembly is fixedly installed on the annular groove, a rotating ring is arranged in the annular groove, and a support is fixedly installed on the rotating ring. According to the heating and ventilation pipe welding auxiliary device for heating and ventilation construction, through the installed cleaning brush and the rotating ring, the welding position of a heating and ventilation pipe can be automatically cleaned, when the driving motor works, the driving gear is driven to rotate, the driven gear is made to move, and the driven gear moves to drive the rotating ring to rotate and drive the support to move; the support moves to drive the cleaning brush to move through the strip-shaped plate, the cleaning brush can clean the to-be-welded position of the heating and ventilation pipe, and the purpose of automatic cleaning is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary devices, in particular to a HVAC pipe welding auxiliary device for HVAC construction. Background Art

[0002] During HVAC construction, the welding of HVAC pipes is an important part of ensuring the sealing and reliability of the system. Welding auxiliary devices can help improve the efficiency and quality of welding. They are used to fix pipes and fittings, ensure stable position during welding, reduce deformation and dislocation, provide support for pipes, and ensure the accuracy of height and direction of pipes during welding. Through the HVAC pipe welding auxiliary device in HVAC construction, the welding quality and efficiency of HVAC pipes can be significantly improved, ensuring the safe operation of the HVAC system.

[0003] However, the existing HVAC pipe welding auxiliary device for HVAC construction is not convenient for cleaning the HVAC pipe to be welded when in use. Excessive impurities can easily affect the welding effect, and manual cleaning is required, which limits work efficiency to a certain extent and increases labor intensity.

[0004] Patent document CN221110542U discloses a HVAC pipe welding auxiliary device for HVAC engineering construction, "including a support frame, the support frame is internally connected to a limiting ring, the limiting ring is internally connected to a sleeve, a connecting assembly is provided on one side of the sleeve, the support frame is internally connected to a positioning rod, the outer wall of the positioning rod is slidably connected to the inside of the sleeve, one end of the positioning rod is internally connected to a limiting wheel, and the outer wall of the limiting ring is rotatably connected to a connecting block. The device is connected to the support frame, the positioning rod, the limiting wheel, the sleeve, the threaded rod, the connecting block The cooperation between the first and the limit ring achieves the effect of positioning and fixing pipes of different sizes, solves the problem that the constraint mold cannot adapt to the fixation of pipes of different sizes and needs to be replaced separately when pipes of different sizes need to be welded, and improves the practicality of the HVAC pipe welding auxiliary device. However, the HVAC pipe welding auxiliary device for HVAC engineering construction in the above-mentioned public document mainly considers the convenience of positioning and fixing pipes of different sizes, but does not consider the problem of automatically cleaning the welding point. Therefore, it is necessary to develop a HVAC pipe welding auxiliary device for HVAC construction. Utility Model Content

[0005] The purpose of the utility model is to provide a HVAC pipe welding auxiliary device for HVAC construction, so as to solve the technical problem of inconvenience in automatically cleaning the HVAC pipe welding parts proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a HVAC pipe welding auxiliary device for HVAC construction, comprising a base plate, an adjustment assembly is symmetrically arranged on the top of the base plate, a support plate is symmetrically arranged on the base plate, a support cylinder is fixedly installed on the support plate, and the support cylinder is connected to the adjustment assembly, a positioning assembly is provided on the support cylinder, an annular groove is fixedly installed on the side of the support cylinder, a drive assembly is fixedly installed on the annular groove, a rotating ring is provided inside the annular groove, a bracket is fixedly installed on the rotating ring, a threaded screw is provided on the bracket, a threaded cylinder is threadedly connected to the threaded screw, one end of the threaded cylinder is fixedly connected to a strip plate, a cleaning brush is fixedly installed on the strip plate, an air jet assembly is provided on the strip plate, and guide plates are symmetrically arranged on the strip plate, and the guide plates pass through the bracket.

[0007] Preferably, strip grooves are symmetrically provided on the bottom plate, guide rods are fixedly installed inside the strip grooves, and the guide rods pass through the support plate.

[0008] Preferably, the adjustment assembly includes a sliding groove, a threaded rod and a drive motor, the sliding groove is arranged on the base plate, the threaded rod is movably arranged inside the sliding groove, the drive motor is fixedly mounted on the base plate, and the output end of the drive motor is threadedly connected to the threaded rod, and a threaded ring corresponding to the threaded rod is fixedly mounted on the bottom of the support plate, and the threaded rod is threadedly connected to the threaded ring.

[0009] Preferably, the positioning assembly includes a square slot, a micro motor, an adjusting bolt, a slider, a positioning plate and a threaded hole. The square slot is fixedly mounted on the support tube, the micro motor is fixedly mounted inside the square slot, one end of the adjusting bolt is fixedly connected to the output end of the micro motor, the slider is passed through the square slot, the positioning plate is fixedly connected to the slider, the threaded hole is arranged inside the slider, and the adjusting bolt is threadedly connected to the threaded hole.

[0010] Preferably, a guide block is fixedly installed inside the square groove, and a guide groove corresponding to the guide block is provided on the sliding block, and the guide block is engaged with the guide groove.

[0011] Preferably, the driving assembly includes a frame, a driving motor and a driving gear. The frame is fixedly mounted on the annular groove, the driving motor is fixedly mounted inside the frame, and the center position of the driving gear is fixedly connected to the output end of the driving motor.

[0012] Preferably, a driven gear is fixedly mounted on the rotating ring, and the driven gear is meshed with the driving gear. A limiting groove is provided on the rotating ring, and a limiting block is provided in an array inside the limiting groove, and the limiting block is fixedly connected to the inner wall of the annular groove.

[0013] Preferably, a mounting groove is provided inside the bracket, a battery assembly is fixedly installed inside the mounting groove, a micro fan is provided inside the mounting groove, and the battery assembly is electrically connected to the micro fan.

[0014] Preferably, the jet assembly includes a diverter slot and a jet head. The diverter slot is embedded in the strip plate and is connected to the output end of the micro blower through a hose. The jet head array is arranged on the diverter slot.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model is convenient for the HVAC pipe welding auxiliary device of HVAC construction to automatically clean the HVAC pipe welding part through the installed cleaning brush and rotating ring. After the cleaning brush moves and contacts one side of the HVAC pipe to be cleaned, the driving motor is electrically connected to the external controller, and the driving motor can be controlled to work by the controller. When the driving motor works, it drives the driving gear to rotate, and the rotation of the driving gear will cause the driven gear to move. The movement of the driven gear will drive the rotating ring to rotate, and the rotation of the rotating ring will drive the bracket to move. When the rotating ring rotates, the limiting groove and the limiting block cooperate to make the rotating ring rotate smoothly inside the annular groove. When the rotating ring rotates, it will drive the bracket to move. The movement of the bracket will drive the cleaning brush to move through the strip plate, and then the cleaning brush can clean the HVAC pipe to be welded, thereby achieving the purpose of automatic cleaning, and avoiding the HVAC pipe welding part to adsorb more impurities and affect the welding effect.

[0017] 2. The utility model can improve the cleanliness of the HVAC pipe welding auxiliary device for HVAC construction by installing a micro fan and an exhaust head. The micro fan will generate wind when it is working. The wind will flow into the diverter trough through the hose. The wind entering the diverter trough will flow to the side of the cleaning brush through the jet head. When the cleaning brush cleans the HVAC pipe, the wind will flow to the surface of the HVAC pipe, which can remove impurities remaining on the surface of the HVAC pipe, thereby improving the cleaning efficiency.

[0018] 3. The utility model facilitates the positioning of HVAC pipes of different sizes by installing a positioning plate. The operation of the micro motor will drive the adjusting bolt to rotate. When the adjusting bolt rotates, the position of the slider will move through the threaded hole. The movement of the slider will drive the positioning plate to move. One side of the positioning plate extends to the inside of the support tube. After the positioning plate moves and contacts the surface of the HVAC pipe, the position of the HVAC pipe will be positioned, which is convenient for positioning the positions of HVAC pipes of different sizes, thereby improving the practicality of the HVAC pipe welding auxiliary device in HVAC construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2This is a schematic structural diagram of the square groove of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the micro motor of the utility model;

[0022] Figure 4 This is a schematic diagram of the slider structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the rotating ring structure of the utility model;

[0024] Figure 6 This is a schematic diagram of the support structure of the utility model;

[0025] Figure 7 This is a schematic diagram of the framework structure of the present utility model.

[0026] In the figure: 1. Base plate; 2. Strip groove; 3. Guide rod; 4. Sliding groove; 5. Threaded rod; 6. Drive motor; 7. Support plate; 8. Threaded ring; 9. Support cylinder; 10. Square groove; 11. Micro motor; 12. Adjusting bolt; 14. Slider; 15. Guide groove; 16. Guide block; 17. Positioning plate; 18. Threaded hole; 19. Annular groove; 20. Frame; 21. Drive motor; 22. Drive gear; 23. Rotating ring; 24. Limiting groove; 25. Limiting block; 26. Driven gear; 27. Bracket; 28. Mounting groove; 29. ​​Battery assembly; 30. Micro fan; 32. Guide plate; 33. Threaded cylinder; 34. Threaded screw; 35. Strip plate; 36. Diverter groove; 37. Injector head; 38. Cleaning brush. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7, a HVAC pipe welding auxiliary device for HVAC construction, including a base plate 1, an adjustment component is symmetrically arranged on the top of the base plate 1, a support plate 7 is symmetrically arranged on the base plate 1, a support cylinder 9 is fixedly installed on the support plate 7, and the support cylinder 9 is connected to the adjustment component, a positioning component is provided on the support cylinder 9, an annular groove 19 is fixedly installed on the side of the support cylinder 9, a drive component is fixedly installed on the annular groove 19, a rotating ring 23 is provided inside the annular groove 19, a bracket 27 is fixedly installed on the rotating ring 23, a threaded screw 34 is provided on the bracket 27, and a threaded connection on the threaded screw 34 A threaded barrel 33 is connected, one end of the threaded barrel 33 is fixedly connected to a strip plate 35, a cleaning brush 38 is fixedly installed on the strip plate 35, an air jet assembly is provided on the strip plate 35, and a guide plate 32 is symmetrically provided on the strip plate 35, and the guide plate 32 passes through the bracket 27. When welding the HVAC pipe, the HVAC pipe welding auxiliary device of the HVAC construction is used to support and limit the HVAC pipe to be welded. When auxiliary welding is performed, after one end of the HVAC pipe to be welded is manually passed through the support barrel 9, when the HVAC pipe to be welded needs to be cleaned, rotating the threaded screw 34 will move the position of the threaded barrel 33 The movement of the threaded cylinder 33 will push the strip plate 35 to move, and the movement of the strip plate 35 will drive the guide plate 32 to move, and then the guide plate 32 will move inside the bracket 27 to make the strip plate 35 move smoothly, thereby driving the cleaning brush 38 to move and contact one side of the HVAC pipe to be cleaned. The driving component will move to rotate the rotating ring 23, and the rotating ring 23 will drive the bracket 27 to move. The movement of the bracket 27 will drive the cleaning brush 38 to move through the strip plate 35, and then the cleaning brush 38 can clean the HVAC pipe to be welded, thereby achieving the purpose of automatic cleaning and avoiding warming. There are many impurities adsorbed at the welding points of the HVAC pipes, which affect the welding effect. After cleaning the welding points of the HVAC pipes, the HVAC pipes inside the support tube 9 are adjusted to a position convenient for welding. The position of the HVAC pipes inside the support tube 9 can be positioned through the positioning component. At the same time, the position of the support plate 7 can be adjusted through the adjustment component, and then the position of the support tube 9 can be adjusted through the support plate 7. The positions of the two groups of HVAC pipes to be welded can be adjusted, and the welding points of the two groups of HVAC pipes can be automatically spliced. Then, the HVAC pipe splicing points can be welded by an external welding robot, thereby improving the welding efficiency.

[0029] See also Figure 1 The bottom plate 1 is symmetrically provided with strip grooves 2, and a guide rod 3 is fixedly installed inside the strip groove 2, and the guide rod 3 passes through the support plate 7. When the support plate 7 moves, the support plate 7 can move smoothly through the cooperation of the guide rod 3.

[0030] See also Figure 1The adjusting component includes a sliding groove 4, a threaded rod 5 and a driving motor 6. The sliding groove 4 is arranged on the base plate 1, and the threaded rod 5 is movably arranged inside the sliding groove 4. The driving motor 6 is fixedly mounted on the base plate 1, and the output end of the driving motor 6 is threadedly connected to the threaded rod 5. A threaded ring 8 corresponding to the threaded rod 5 is fixedly mounted on the bottom of the support plate 7, and the threaded rod 5 is threadedly connected to the threaded ring 8, so that the driving motor 6 will drive the threaded rod 5 to rotate when it works. When the threaded rod 5 rotates, the position of the threaded ring 8 will move, and then the position of the support plate 7 will be adjusted through the threaded ring 8. The position of the HVAC pipe fixed inside the support tube 9 can be adjusted by cooperating with the support plate 7 and the support tube 9. The driving motor 6 is electrically connected to an external controller, and the working state of the driving motor 6 can be controlled by the controller.

[0031] See also Figure 2 、 Figure 3 and Figure 4 The positioning assembly includes a square slot 10, a micro motor 11, an adjusting bolt 12, a slider 14, a positioning plate 17 and a threaded hole 18. The square slot 10 is fixedly mounted on the support tube 9, the micro motor 11 is fixedly mounted inside the square slot 10, one end of the adjusting bolt 12 is fixedly connected to the output end of the micro motor 11, the slider 14 is passed through the inside of the square slot 10, the positioning plate 17 is fixedly connected to the slider 14, the threaded hole 18 is provided inside the slider 14, and the adjusting bolt 12 is threadedly connected to the threaded hole 18, a guide block 16 is fixedly mounted inside the square slot 10, and a guide groove 1 corresponding to the guide block 16 is provided on the slider 14. 5, and the guide block 16 is engaged with the guide groove 15, and the micro motor 11 is electrically connected to the external controller at the same time. The micro motor 11 can be controlled by the controller to work. When the positioning component fixes the position of the HVAC pipe inside the support tube 9, the micro motor 11 works to drive the adjusting bolt 12 to rotate. When the adjusting bolt 12 rotates, the position of the slider 14 is moved through the threaded hole 18. The movement of the slider 14 drives the positioning plate 17 to move. One side of the positioning plate 17 extends to the inside of the support tube 9. After the positioning plate 17 moves and contacts the surface of the HVAC pipe, the position of the HVAC pipe is positioned, which is convenient for positioning the positions of HVAC pipes of different sizes.

[0032] See also Figure 7 The driving assembly includes a frame 20, a driving motor 21 and a driving gear 22. The frame 20 is fixedly mounted on the annular groove 19, the driving motor 21 is fixedly mounted inside the frame 20, the center position of the driving gear 22 is fixedly connected to the output end of the driving motor 21, the driving motor 21 is electrically connected to an external controller, and the driving motor 21 can be controlled to work by the controller. When the driving motor 21 is working, it will drive the driving gear 22 to rotate, and the rotation of the driving gear 22 will cause the driven gear 26 to move.

[0033] See also Figure 5A driven gear 26 is fixedly mounted on the rotating ring 23, and the driven gear 26 is meshed with the driving gear 22. A limiting groove 24 is provided on the rotating ring 23, and a limiting block 25 is provided in an array inside the limiting groove 24. The limiting block 25 is fixedly connected to the inner wall of the annular groove 19. The movement of the driven gear 26 will drive the rotating ring 23 to rotate, and the rotation of the rotating ring 23 will drive the bracket 27 to move. When the rotating ring 23 rotates, the limiting groove 24 cooperates with the limiting block 25 to enable the rotating ring 23 to rotate smoothly inside the annular groove 19.

[0034] See also Figure 6 The bracket 27 is provided with a mounting groove 28, and a battery assembly 29 is fixedly installed inside the mounting groove 28. A micro fan 30 is provided inside the mounting groove 28, and the battery assembly 29 is electrically connected to the micro fan 30. The jet assembly includes a diverter groove 36 and a jet head 37. The diverter groove 36 is embedded in the strip plate 35, and the diverter groove 36 is connected to the output end of the micro fan 30 through a hose. The jet head 37 array is arranged on the diverter groove 36. The micro fan 30 is remotely controlled. The micro fan 30 will generate wind when it works. The wind will flow into the diverter groove 36 through the hose. The wind entering the diverter groove 36 will flow to the side of the cleaning brush 38 through the jet head 37. Then, when the cleaning brush 38 cleans the HVAC pipe, the wind will flow to the surface of the HVAC pipe, which can remove impurities remaining on the surface of the HVAC pipe, thereby improving the cleaning efficiency.

[0035] Working principle: first, when welding the HVAC pipe, use the HVAC pipe welding auxiliary device of HVAC construction to support and limit the HVAC pipe to be welded. When manually passing one end of the HVAC pipe to be welded through the support tube 9, when the HVAC pipe to be welded needs to be cleaned, rotating the threaded screw 34 will move the position of the threaded tube 33, and the movement of the threaded tube 33 will push the strip plate 35 to move. The movement of the strip plate 35 will drive the guide plate 32 to move, and then the guide plate 32 will move inside the bracket 27 to make the strip plate 35 move smoothly, and then drive the cleaning brush 38 to move and contact one side of the HVAC pipe to be cleaned. The driving motor 21 is electrically connected to the external controller, and the controller can be controlled The driving motor 21 works, and when the driving motor 21 works, it drives the driving gear 22 to rotate. The rotation of the driving gear 22 will cause the driven gear 26 to move. The movement of the driven gear 26 will drive the rotating ring 23 to rotate. The rotation of the rotating ring 23 will drive the bracket 27 to move. When the rotating ring 23 rotates, the limiting groove 24 cooperates with the limiting block 25 to make the rotating ring 23 rotate smoothly inside the annular groove 19. When the rotating ring 23 rotates, it will drive the bracket 27 to move. The movement of the bracket 27 will drive the cleaning brush 38 to move through the strip plate 35, and then the cleaning brush 38 can clean the HVAC pipe to be welded, thereby achieving the purpose of automatic cleaning, and avoiding the HVAC pipe welding place to absorb more impurities and affect the welding effect. The micro fan 30 will generate wind when it is working. The wind will flow into the diverter slot 36 through the hose. The wind entering the diverter slot 36 will flow to the side of the cleaning brush 38 through the nozzle 37. Then, when the cleaning brush 38 cleans the HVAC pipe, the wind will flow to the surface of the HVAC pipe, which can remove impurities remaining on the surface of the HVAC pipe, thereby improving the cleaning efficiency. After cleaning the HVAC pipe welding part, the HVAC pipe inside the support cylinder 9 is adjusted to a position convenient for welding, and the micro motor 11 is driven to rotate the adjusting bolt 12. When the adjusting bolt 12 rotates, the slider 14 will move through the threaded hole 18, and the movement of the slider 14 will drive the positioning plate 17 to move. When the threaded rod 5 is rotated, the threaded ring 8 will move, and then the position of the support plate 7 will be adjusted through the threaded ring 8. The support plate 7 cooperates with the support tube 9 to adjust the position of the HVAC pipe fixed inside the support tube 9, and the positions of the two groups of HVAC pipes to be welded can be adjusted, and the welding parts of the two groups of HVAC pipes can be automatically spliced, and then the HVAC pipe splicing can be welded by an external welding robot, thereby improving the welding efficiency.

[0036] 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A heating pipe welding auxiliary device for heating and ventilation construction, comprising a base plate (1), characterized in that: The top of the base plate (1) is symmetrically provided with an adjustment assembly, the base plate (1) is symmetrically provided with a support plate (7), the support plate (7) is fixedly provided with a support cylinder (9), and the support cylinder (9) is connected to the adjustment assembly, the support cylinder (9) is provided with a positioning assembly, the side of the support cylinder (9) is fixedly provided with an annular groove (19), the driving assembly is fixedly provided on the annular groove (19), a rotating ring (23) is provided inside the annular groove (19), and the rotating ring ( A bracket (27) is fixedly mounted on the bracket (23), a threaded screw (34) is provided on the bracket (27), a threaded barrel (33) is threadedly connected to the threaded screw (34), one end of the threaded barrel (33) is fixedly connected to a strip plate (35), a cleaning brush (38) is fixedly mounted on the strip plate (35), an air injection assembly is provided on the strip plate (35), and a guide plate (32) is symmetrically provided on the strip plate (35), and the guide plate (32) passes through the bracket (27).

2. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The bottom plate (1) is symmetrically provided with strip grooves (2), a guide rod (3) is fixedly installed inside the strip groove (2), and the guide rod (3) passes through the support plate (7).

3. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The adjustment assembly comprises a sliding groove (4), a threaded rod (5) and a driving motor (6); the sliding groove (4) is arranged on the base plate (1); the threaded rod (5) is movably arranged inside the sliding groove (4); the driving motor (6) is fixedly mounted on the base plate (1); and the output end of the driving motor (6) is threadedly connected to the threaded rod (5); a threaded ring (8) corresponding to the threaded rod (5) is fixedly mounted on the bottom of the support plate (7); and the threaded rod (5) is threadedly connected to the threaded ring (8).

4. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The positioning assembly comprises a square slot (10), a micro motor (11), an adjusting bolt (12), a slider (14), a positioning plate (17) and a threaded hole (18); the square slot (10) is fixedly mounted on the support tube (9); the micro motor (11) is fixedly mounted inside the square slot (10); one end of the adjusting bolt (12) is fixedly connected to the output end of the micro motor (11); the slider (14) is inserted into the square slot (10); the positioning plate (17) is fixedly connected to the slider (14); the threaded hole (18) is arranged inside the slider (14); and the adjusting bolt (12) is threadedly connected to the threaded hole (18).

5. The HVAC pipe welding auxiliary device for HVAC construction according to claim 4, characterized in that: A guide block (16) is fixedly installed inside the square groove (10), and a guide groove (15) corresponding to the guide block (16) is provided on the slider (14), and the guide block (16) is engaged with the guide groove (15).

6. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The driving assembly comprises a frame (20), a driving motor (21) and a driving gear (22); the frame (20) is fixedly mounted on the annular groove (19); the driving motor (21) is fixedly mounted inside the frame (20); and the center position of the driving gear (22) is fixedly connected to the output end of the driving motor (21).

7. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: A driven gear (26) is fixedly mounted on the rotating ring (23), and the driven gear (26) is meshed with the driving gear (22). A limiting groove (24) is provided on the rotating ring (23), and a limiting block (25) is arranged in an array inside the limiting groove (24), and the limiting block (25) is fixedly connected to the inner wall of the annular groove (19).

8. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The bracket (27) is provided with a mounting groove (28) inside, a battery assembly (29) is fixedly installed inside the mounting groove (28), a micro fan (30) is provided inside the mounting groove (28), and the battery assembly (29) is electrically connected to the micro fan (30).

9. The HVAC pipe welding auxiliary device for HVAC construction according to claim 1, characterized in that: The jet assembly includes a diverter trough (36) and a jet head (37). The diverter trough (36) is embedded in the strip plate (35), and the diverter trough (36) is connected to the output end of the micro fan (30) through a hose. The jet head (37) is arranged in an array on the diverter trough (36).

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