A safe welding device for municipal water supply pipeline

Abstract

The present invention discloses a municipal water supply pipeline safety welding device, which belongs to the field of pipeline welding technology, including a platform arranged on the upper side of pipeline one and pipeline two, two groups of limiting mechanisms are arranged on the lower side of the platform, each group of limiting mechanisms is provided with a fixing mechanism one and a fixing mechanism two inside, two groups of adjustment mechanisms are arranged between the two groups of limiting mechanisms, the limiting mechanism includes a fixed half-moon ring arranged on the lower side of the platform, a support frame is fixedly installed on the upper front side and the rear side of the outer surface of the fixed half-moon ring, a support member one is fixedly installed between the support frame and the platform, a slide groove one is provided on the left and right end faces of the fixed half-moon ring, and a limiting ring two is arranged on the left side of the fixed half-moon ring. This scheme sets a limiting mechanism, uses a dual-axis motor to drive the limiting ring two to rotate, so that the limiting ring two and the fixed half-moon ring are staggered, so that the equipment is initially fixed on the pipeline, and the equipment is quickly installed.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, and more specifically to a municipal water supply pipeline safety welding device. Background Art

[0002] The pipeline weld welding device is a device for welding pipelines. With the changes in technology, people's requirements for pipeline weld welding devices are getting higher and higher.

[0003] A Chinese patent with the authorization publication number CN112045343A discloses a pipeline weld welding device. When welding the pipeline, people can put a ring-shaped moving slide rail on the pipeline so that the muzzle of the welding gun is aligned with the weld. According to the actual situation, people can adjust the telescopic position of the telescopic support rod inside the telescopic support tube by loosening and tightening the positioning screw, so that the muzzle of the welding gun can be better aligned with the weld for work, and then loosen and tighten the threaded column to make it close to the outer wall of the pipeline, fix the position of the fastening mounting ring, and then turn on the welding gun for welding. People can push the mounting support frame at a uniform speed so that the sliding guide wheel slides at a uniform speed inside the moving slide groove, which can save people's working time and physical strength, and can also improve the smoothness and uniformity of the weld joint, thereby improving the quality of welding.

[0004] Although this pipeline weld welding device can improve the smoothness and uniformity of the weld, in actual use, the stability between the device and the pipeline is poor. During the pipeline welding process, if the device shakes, it will affect the welding quality of the pipeline. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a municipal water supply pipeline safety welding device, which can improve the stability between the equipment and the pipeline.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A municipal water supply pipeline safety welding device comprises a platform arranged on the upper sides of pipeline one and pipeline two, two groups of limiting mechanisms are arranged on the lower side of the platform, each group of limiting mechanisms is arranged inside a fixing mechanism one and a fixing mechanism two, two groups of adjustment mechanisms are arranged between the two groups of limiting mechanisms, the limiting mechanism comprises a fixed half-moon ring arranged on the lower side of the platform, a support frame is fixedly installed on the front and rear sides of the upper end of the outer surface of the fixed half-moon ring, a support member one is fixedly installed between the support frame and the platform, a slide groove one is opened on the left and right end faces of the fixed half-moon ring, a limiting ring two is arranged on the left side of the fixed half-moon ring, and a limiting ring one is arranged on the right side of the fixed half-moon ring, a slip ring is fixedly installed on one side of the limiting ring one and the limiting ring two corresponding to the slide groove one, and the slip ring is slidably connected to the slide groove one.

[0008] Furthermore, the limiting mechanism also includes a rotating shaft 2 rotatably connected to the upper side of the fixed half-moon ring, a gear 3 is fixedly installed on the outer surface of the rotating shaft 2, and teeth are fixedly installed on the upper end surface of the limiting ring 2 in a crescent shape, and the teeth are meshed with gear 3.

[0009] Furthermore, a dual-axis motor is fixedly installed on the left side of the upper end surface of the platform, and a gear 1 is fixedly installed on the upper output shaft of the dual-axis motor. A rotating shaft 1 is arranged on the right side of the gear 1, and a gear 2 is fixedly installed on the outer surface of the rotating shaft 1. The gear 1 is meshed with the gear 2. The limiting mechanism is provided with two groups and is symmetrically arranged on the left and right sides of the lower side of the platform.

[0010] Furthermore, a transmission wheel 1 is fixedly installed on the upper end of the rotating shaft 1, the lower end output shaft of the dual-axis motor is fixedly connected to one group of rotating shafts 2, a transmission wheel 2 is arranged on the upper side of the platform, and the upper end of the other group of rotating shafts 2 extends to the upper side of the platform and is fixedly connected to the transmission wheel 2, and belts are arranged on the outer sides of the transmission wheel 1 and the transmission wheel 2, and are connected through belt transmission.

[0011] Furthermore, the fixing mechanism includes a threaded rod fixedly installed on the lower end face of the gear three, a limiting groove is provided at the upper end of the fixed half-moon ring, a threaded sleeve is slidably connected inside the limiting groove, the threaded sleeve is spirally connected to the threaded rod, a connecting piece is provided on the inner side of the fixed half-moon ring, and the threaded sleeve is fixedly connected to the connecting piece.

[0012] Furthermore, the fixing mechanism also includes a transmission rod slidably connected to the inner sides of the fixed half-moon ring, a limiting ring is fixedly installed on the upper side of the outer surface of the transmission rod, a spring is fixedly installed between the limiting ring and the fixed half-moon ring, and the spring is sleeved on the outer surface of the transmission rod.

[0013] Furthermore, a fixing column is fixedly installed in the middle of the outer surface of the transmission rod, a connecting rod is rotatably connected between the fixing column and the connecting piece, a splint is fixedly installed at the lower end of the transmission rod, and the connecting rod, transmission rod, splint, limit ring and spring are symmetrically arranged in two groups.

[0014] Furthermore, the second fixing mechanism includes an inner cavity opened inside the splint, the inner part of the inner cavity is rotatably connected with a rotating shaft three, an extension plate is provided on the lower side of the splint, both ends of the rotating shaft three extend to the outside of the inner cavity and are fixedly connected to the extension plate, a traction rope is provided inside the inner cavity, one end of the traction rope is wrapped around the outer surface of the rotating shaft three, and the other end of the traction rope extends to the inside of the support frame and is fixedly connected to the support frame.

[0015] Furthermore, the adjustment mechanism includes a fixing ring arranged between two groups of limiting rings, and a threaded sleeve 2 is fixedly installed on the left and right ends of the outer surface of the fixing ring. The end of the threaded sleeve 2 is spirally connected to a threaded rod 2, and the threaded rod 2 is rotatably connected to the limiting ring 1. A handle is fixedly installed on the outer surface of the threaded rod 2.

[0016] Furthermore, a fixed shaft is fixedly installed inside the fixed ring, a sliding sleeve is rotatably connected to the outer surface of the fixed shaft, a welding gun is fixedly installed on the outer surface of the sliding sleeve, and two groups of adjustment mechanisms are provided, which are symmetrically arranged on the front and rear sides of the two groups of limit rings.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This solution sets a limit mechanism and uses a dual-axis motor to drive the limit ring 2 to rotate, so that the limit ring 2 and the fixed half-moon ring are offset, so that the equipment is initially fixed on the pipeline, realizing quick installation of the equipment;

[0019] (2) This solution sets a fixing mechanism 1, and the dual-axis motor will synchronously drive the threaded rod 1 to rotate, so that the threaded sleeve 1 drops, and drives the two sets of clamps to fit tightly against the pipe through two sets of connecting rods, so that the equipment is firmly fixed on the fixing, avoiding the equipment from shaking during the welding process, which affects the welding quality;

[0020] (3) This solution sets a fixing mechanism 2, and pulls the traction rope during the operation of the fixing mechanism 1. The traction rope is wrapped around the outer surface of the rotating shaft 3, so that the rotating shaft 3 deflects, and the extension plate is closely attached to the pipeline, thereby increasing the stability between the equipment and the pipeline;

[0021] (4) This solution can adjust the position of the welding gun according to the position of the weld by setting an adjustment mechanism, and can also adjust the deflection angle of the welding gun so that the welding gun can perfectly contact the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0024] Figure 3 For the present invention Figure 1 The enlarged schematic diagram of point B in the middle;

[0025] Figure 4 For the present invention Figure 1 The enlarged schematic diagram at C in the middle;

[0026] Figure 5 It is a side view of the overall structure of the present invention;

[0027] Figure 6 For the present invention Figure 5 The enlarged schematic diagram at D in the middle;

[0028] Figure 7 It is a cross-sectional view of the overall structure of the present invention;

[0029] Figure 8 For the present invention Figure 7 The enlarged schematic diagram at E in the middle;

[0030] Fig. 9 For the present invention Figure 7 The enlarged schematic diagram at F in the middle;

[0031] Fig.10 For the present invention Figure 7 Enlarged schematic diagram at point G in the middle.

[0032] Description of the numbers in the figure:

[0033] 1. Pipeline 1; 2. Pipeline 2; 3. Platform; 4. Dual-axis motor; 5. Gear 1; 6. Rotating shaft 1; 7. Gear 2; 8. Transmission wheel 1; 9. Transmission wheel 2; 10. Belt; 11. Rotating shaft 2; 12. Support member 1; 13. Fixed half-moon ring; 14. Slide 1; 15. Limiting ring 1; 16. Slip ring; 17. Tooth; 18. Gear 3; 19. Limiting ring 2; 20. Threaded rod 1; 21. Screw 1. Threaded sleeve one; 22. Limiting groove; 23. Connecting piece; 24. Transmission rod; 25. Limiting ring; 26. Spring; 27. Fixed column; 28. Connecting rod; 29. ​​Clamp; 30. Inner cavity; 31. Towing rope; 32. Rotating shaft three; 33. Extension plate; 34. Support frame; 35. Threaded rod two; 36. Handle; 37. Threaded sleeve two; 38. Fixed ring; 39. Fixed shaft; 40. Sliding sleeve; 41. Welding gun. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 10A municipal water supply pipeline safety welding device comprises a platform 3 arranged on the upper side of a pipeline 1 and a pipeline 2, two groups of limiting mechanisms are arranged on the lower side of the platform 3, a fixing mechanism 1 and a fixing mechanism 2 are arranged inside each group of limiting mechanisms, two groups of adjusting mechanisms are arranged between the two groups of limiting mechanisms, the limiting mechanism comprises a fixed half-moon ring 13 arranged on the lower side of the platform 3, a support frame 34 is fixedly installed on the front and rear sides of the upper end of the outer surface of the fixed half-moon ring 13, a support member 12 is fixedly installed between the support frame 34 and the platform 3, a slide groove 14 is opened on the left and right end surfaces of the fixed half-moon ring 13, a limiting ring 2 19 is arranged on the left side of the fixed half-moon ring 13, and a limiting ring 15 is arranged on the right side of the fixed half-moon ring 13, and a slip ring 16 is fixedly installed on one side of the limiting ring 15 and the limiting ring 2 19 corresponding to the slide groove 14, and the slip ring 16 is slidably connected to the slide groove 14.

[0036] The limiting mechanism also includes a rotating shaft 2 11 rotatably connected to the upper side of the fixed half-moon ring 13, a gear 3 18 is fixedly installed on the outer surface of the rotating shaft 2 11, a tooth 17 is fixedly installed on the upper end surface of the limiting ring 2 19, and the tooth 17 is arranged in a crescent shape, and the tooth 17 meshes with the gear 3 18. A dual-axis motor 4 is fixedly installed on the left side of the upper end surface of the platform 3, and a gear 1 5 is fixedly installed on the upper end output shaft of the dual-axis motor 4. A rotating shaft 6 is arranged on the right side of the gear 1 5, and a gear 2 7 is fixedly installed on the outer surface of the rotating shaft 6. Wheel 1 5 is meshed with gear 2 7. Two groups of limit mechanisms are provided and are symmetrically arranged on the left and right sides below the platform 3. A transmission wheel 1 8 is fixedly installed on the upper end of the rotating shaft 1 6. The lower end output shaft of the dual-axis motor 4 is fixedly connected to one group of rotating shafts 2 11. A transmission wheel 2 9 is provided on the upper side of the platform 3. The upper end of the other group of rotating shafts 2 11 extends to the upper side of the platform 3 and is fixedly connected to the transmission wheel 2 9. Belts 10 are provided on the outer sides of the transmission wheel 1 8 and the transmission wheel 2 9, and are connected through the belt 10.

[0037] First, place the equipment on fixed pipe 1 and pipe 2, then start the dual-axis motor 4 to drive gear 15 to rotate, gear 15 engages with gear 2 7 on shaft 16, so shaft 16 will synchronously carry transmission wheel 18 to rotate, transmission wheel 18 and transmission wheel 2 9 on shaft 2 11 in another set of limiting mechanisms are connected by belt 10, so shaft 2 11 in the two sets of limiting mechanisms will rotate synchronously, the rotation of shaft 2 11 will carry gear 3 18 to rotate, the two sets of gears 3 18 rotate in opposite directions, and limiting ring 2 19 engages with gear 3 18 through the teeth 17 on the outer surface, limiting ring 2 19 will rotate one hundred and eighty degrees, and be offset with the fixed half-moon ring 13, so that the equipment is initially fixed and installed on pipe 1 and pipe 2.

[0038] This solution sets a limit mechanism and uses a dual-axis motor 4 to drive the limit ring 2 19 to rotate, so that the limit ring 2 19 and the fixed half-moon ring 13 are staggered, so that the equipment is initially fixed on the pipeline, and the equipment can be quickly installed.

[0039] The fixing mechanism 1 includes a threaded rod 1 20 fixedly installed on the lower end surface of the gear 3 18, a limiting groove 22 is provided at the upper end of the fixed half-moon ring 13, a threaded sleeve 1 21 is slidably connected inside the limiting groove 22, the threaded sleeve 1 21 is connected to the threaded rod 1 20 by spiral transmission, a connecting piece 23 is provided on the inner side of the fixed half-moon ring 13, and the threaded sleeve 1 21 is fixedly connected to the connecting piece 23.

[0040] The fixing mechanism 1 also includes a transmission rod 24 slidably connected to the inner sides of the fixed half-moon ring 13, a limit ring 25 is fixedly installed on the upper side of the outer surface of the transmission rod 24, a spring 26 is fixedly installed between the limit ring 25 and the fixed half-moon ring 13, the spring 26 is sleeved on the outer surface of the transmission rod 24, a fixing column 27 is fixedly installed in the middle of the outer surface of the transmission rod 24, a connecting rod 28 is rotatably connected between the fixing column 27 and the connecting piece 23, a splint 29 is fixedly installed at the lower end of the transmission rod 24, and the connecting rod 28, the transmission rod 24, the splint 29, the limit ring 25 and the spring 26 are symmetrically arranged in two groups.

[0041] When gear three 18 rotates, it will synchronously drive threaded rod one 20 to rotate. Threaded rod one 20 is connected to threaded sleeve one 21 by spiral transmission. Therefore, threaded sleeve one 21 will carry connecting piece 23 to move downward, so that connecting piece 23 is in close contact with pipe one 1 or pipe two 2. When connecting piece 23 descends, it will carry transmission rod 24 down through connecting rod 28. When transmission rod 24 descends, clamp plate 29 will be in close contact with pipe one 1 or pipe two 2. Two sets of clamp plates 29 will move synchronously and cooperate with connecting piece 23 to firmly fix the equipment on pipe one 1 or pipe two 2.

[0042] In this solution, by setting up a fixing mechanism 1, a dual-axis motor 4 will synchronously drive a threaded rod 20 to rotate, causing a threaded sleeve 21 to drop, and drive two groups of clamps 29 to fit tightly against the pipe through two groups of connecting rods 28, so that the equipment is firmly fixed on the fixing mechanism to prevent the equipment from shaking during welding and affecting the welding quality.

[0043] The second fixing mechanism includes an inner cavity 30 opened inside the splint 29, and the inner cavity 30 is rotatably connected with a rotating shaft 32. An extension plate 33 is provided on the lower side of the splint 29. Both ends of the rotating shaft 32 extend to the outside of the inner cavity 30 and are fixedly connected to the extension plate 33. A traction rope 31 is provided inside the inner cavity 30, and one end of the traction rope 31 is wrapped around the outer surface of the rotating shaft 32, and the other end of the traction rope 31 extends to the inside of the support frame 34 and is fixedly connected to the support frame 34.

[0044] When the transmission rod 24 descends, since one end of the traction rope 31 is fixedly connected to the support frame 34, when the transmission rod 24 descends, the traction rope 31 will be pulled, and the other end of the traction rope 31 will be wrapped around the outer surface of the rotating shaft 32, thereby driving the rotating shaft 32 to rotate. The rotation of the rotating shaft 32 will synchronously carry the extension plate 33 to deflect, so that the extension plate 33 deflects and fits closely to the pipe 1 or the pipe 2, thereby increasing the stability between the equipment and the pipe. Secondly, when the transmission rod 24 descends, the spring 26 will be squeezed by the limit ring 25. When the fixed state of the equipment needs to be released, the transmission rod 24 can return to its original position under the action of the spring 26, and the traction rope 31 is provided with a memory alloy inside, so it will be rewound around the outer surface of the rotating shaft 32.

[0045] In this solution, by setting up a fixing mechanism 2, the traction rope 31 is pulled during the operation of the fixing mechanism 1, and the traction rope 31 is wrapped around the outer surface of the rotating shaft 32, so that the rotating shaft 32 is deflected, and the extension plate 33 is tightly attached to the pipeline, thereby increasing the stability between the equipment and the pipeline.

[0046] The adjusting mechanism comprises a fixing ring 38 arranged between two groups of limiting rings 15, a threaded sleeve 37 is fixedly installed on the left and right ends of the outer surface of the fixing ring 38, a threaded rod 35 is spirally connected to the end of the threaded sleeve 37, the threaded rod 35 is rotatably connected to the limiting ring 15, a handle 36 is fixedly installed on the outer surface of the threaded rod 35, a fixing shaft 39 is fixedly installed inside the fixing ring 38, a sliding sleeve 40 is rotatably connected to the outer surface of the sliding sleeve 40, a welding gun 41 is fixedly installed on the outer surface of the sliding sleeve 40, and the adjusting mechanism comprises two groups, which are symmetrically arranged on the front and rear sides of the two groups of limiting rings 15.

[0047] The handle 36 on the threaded rod 2 35 can be twisted to rotate the threaded rod 2 35, so that the threaded sleeve 2 37 carrying the fixing ring 38 can be displaced, thereby adjusting the position of the welding gun 41 according to the position of the weld. At the same time, the deflection angle of the welding gun 41 can also be adjusted so that the welding gun 41 can be perfectly in contact with the weld. After adjusting the position and angle of the welding gun 41, the welding gun 41 can be started for welding. Then, the limiting ring 15 is manually rotated to rotate the two sets of welding guns 41 by 180 degrees, so as to weld the weld between the pipe 1 and the pipe 2 2.

[0048] This solution can adjust the position of the welding gun 41 according to the position of the weld by providing an adjustment mechanism, and can also adjust the deflection angle of the welding gun 41 so that the welding gun 41 can perfectly contact the weld.

[0049] Instructions for use: First, place the device on pipe 1 and pipe 2 in a fixed state, then start the dual-axis motor 4, drive gear 15 to rotate, gear 15 is meshed with gear 2 7 on shaft 16, so shaft 16 will synchronously carry transmission wheel 18 to rotate, transmission wheel 18 and transmission wheel 2 9 on shaft 2 11 in another set of limiting mechanisms are connected through belt 10, so shaft 2 11 in the two sets of limiting mechanisms will rotate synchronously, the rotation of shaft 2 11 will carry gear 3 18 to rotate, the two sets of gear 3 18 rotate in opposite directions, and limiting ring 2 19 is meshed with gear 3 18 through the teeth 17 on the outer surface, limiting ring 2 19 It will rotate 180 degrees and be offset with the fixed half-moon ring 13, so that the equipment is initially fixed and installed on the pipe 1 and the pipe 2. Secondly, when the gear 3 18 rotates, it will synchronously drive the threaded rod 20 to rotate. The threaded rod 20 is spirally connected with the threaded sleeve 21, so the threaded sleeve 21 will carry the connecting piece 23 to move downward, so that the connecting piece 23 is tightly attached to the pipe 1 or the pipe 2. When the connecting piece 23 descends, it will carry the transmission rod 24 downward through the connecting rod 28. The descent of the transmission rod 24 will make the clamping plate 29 tightly attached to the pipe 1 or the pipe 2. The two sets of clamping plates 29 move synchronously and cooperate with the connecting piece 23 to firmly fix the equipment on the pipe 1 or the pipe 2. On the pipeline 2, secondly, when the transmission rod 24 descends, since one end of the traction rope 31 is fixedly connected to the support frame 34, when the transmission rod 24 descends, the traction rope 31 will be pulled, and the other end of the traction rope 31 will be wrapped around the outer surface of the shaft 32, thereby driving the shaft 32 to rotate. The rotation of the shaft 32 will synchronously carry the extension plate 33 to deflect, so that the extension plate 33 deflects and fits closely to the pipeline 1 or the pipeline 2, thereby increasing the stability between the equipment and the pipeline. When the transmission rod 24 descends, the spring 26 will be squeezed through the limit ring 25. When the fixed state of the equipment needs to be released, the transmission rod 24 can return to its original state under the action of the spring 26. The traction rope 31 is in position, and a memory alloy is arranged inside, so it will be rewound around the outer surface of the rotating shaft three 32. Secondly, the handle 36 on the threaded rod two 35 can be twisted to rotate the threaded rod two 35, so that the threaded sleeve two 37 carrying the fixing ring 38 can be displaced, so as to adjust the position of the welding gun 41 according to the position of the weld. At the same time, the deflection angle of the welding gun 41 can also be adjusted so that the welding gun 41 can be perfectly in contact with the weld. After adjusting the position and angle of the welding gun 41, the welding gun 41 can be started for welding. Then, the limiting ring one 15 is manually rotated to rotate the two groups of welding guns 41 by one hundred and eighty degrees, so as to weld the weld between the pipe one 1 and the pipe two 2.

[0050] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A municipal water supply pipeline safety welding device, comprising a platform (3) arranged on the upper side of a first pipeline (1) and a second pipeline (2), characterized in that: Two groups of limiting mechanisms are arranged on the lower side of the platform (3), and each group of limiting mechanisms is provided with a fixing mechanism 1 and a fixing mechanism 2 inside, and two groups of adjustment mechanisms are arranged between the two groups of limiting mechanisms. The limiting mechanism comprises a fixed half-moon ring (13) arranged on the lower side of the platform (3), and a support frame (34) is fixedly installed on the front and rear sides of the upper end of the outer surface of the fixed half-moon ring (13), and a support member 1 (12) is fixedly installed between the support frame (34) and the platform (3), and a slide groove 1 (14) is provided on the left and right end surfaces of the fixed half-moon ring (13). The outer side of the fixed half-moon ring (13) A limit ring 2 (19) is provided, a limit ring 1 (15) is provided on the inner side of the fixed half-moon ring (13), a slip ring (16) is fixedly installed on one side of the limit ring 1 (15) and the limit ring 2 (19) corresponding to the slide groove 1 (14), the slip ring (16) is slidably connected to the slide groove 1 (14), the limit mechanism also includes a rotating shaft 2 (11) rotatably connected to the upper side of the fixed half-moon ring (13), a gear 3 (18) is fixedly installed on the outer surface of the rotating shaft 2 (11), and teeth (17) are fixedly installed on the upper end surface of the limit ring 2 (19) in a crescent-shaped arrangement, the teeth (17) and the gear 3 (18) are connected to each other in a slidable manner. 18) meshing, the fixing mechanism 1 comprises a threaded rod 1 (20) fixedly mounted on the lower end surface of the gear 3 (18), a limiting groove (22) is provided at the upper end of the fixing half-moon ring (13), a threaded sleeve 1 (21) is slidably connected inside the limiting groove (22), the threaded sleeve 1 (21) is connected to the threaded rod 1 (20) by a spiral transmission, a connecting piece (23) is provided on the inner side of the fixing half-moon ring (13), the threaded sleeve 1 (21) is fixedly connected to the connecting piece (23), the fixing mechanism 1 also comprises a transmission rod (24) slidably connected to both sides of the inside of the fixing half-moon ring (13), the transmission rod A limit ring (25) is fixedly installed on the upper side of the outer surface of the transmission rod (24); a spring (26) is fixedly installed between the limit ring (25) and the fixed half-moon ring (13); the spring (26) is sleeved on the outer surface of the transmission rod (24); a fixed column (27) is fixedly installed in the middle of the outer surface of the transmission rod (24); a connecting rod (28) is rotatably connected between the fixed column (27) and the connecting member (23); a clamping plate (29) is fixedly installed at the lower end of the transmission rod (24); and the connecting rod (28), the transmission rod (24), the clamping plate (29), the limit ring (25) and the spring (26) are symmetrically arranged in two groups.

2. A municipal water supply pipeline safety welding device according to claim 1, characterized in that: A dual-axis motor (4) is fixedly mounted on the left side of the upper end surface of the platform (3); a gear 1 (5) is fixedly mounted on the upper output shaft of the dual-axis motor (4); a rotating shaft 1 (6) is arranged on the right side of the gear 1 (5); a gear 2 (7) is fixedly mounted on the outer surface of the rotating shaft 1 (6); the gear 1 (5) is meshed with the gear 2 (7); and two sets of the limiting mechanisms are arranged symmetrically on the left and right sides below the platform (3).

3. A municipal water supply pipeline safety welding device according to claim 2, characterized in that: A transmission wheel 1 (8) is fixedly mounted on the upper end of the rotating shaft 1 (6); the lower output shaft of the dual-axis motor (4) is fixedly connected to one of the rotating shafts 2 (11); a transmission wheel 2 (9) is arranged on the upper side of the platform (3); the upper end of the other rotating shaft 2 (11) extends to the upper side of the platform (3) and is fixedly connected to the transmission wheel 2 (9); belts (10) are arranged on the outer sides of the transmission wheel 1 (8) and the transmission wheel 2 (9), and are connected through the belts (10).

4. A municipal water supply pipeline safety welding device according to claim 3, characterized in that: The second fixing mechanism comprises an inner cavity (30) opened inside the clamp (29), the inner cavity (30) is rotatably connected to a rotating shaft (32), an extension plate (33) is provided on the lower side of the clamp (29), both ends of the rotating shaft (32) extend to the outside of the inner cavity (30) and are fixedly connected to the extension plate (33), a traction rope (31) is provided inside the inner cavity (30), one end of the traction rope (31) is wound around the outer surface of the rotating shaft (32), and the other end of the traction rope (31) extends to the inside of the support frame (34) and is fixedly connected to the support frame (34).

5. A municipal water supply pipeline safety welding device according to claim 4, characterized in that: The adjustment mechanism comprises a fixing ring (38) arranged between two groups of limiting rings (15), a threaded sleeve (37) is fixedly mounted on the left and right ends of the outer surface of the fixing ring (38), a threaded rod (35) is spirally connected to the end of the threaded sleeve (37), the threaded rod (35) is rotatably connected to the limiting ring (15), and a handle (36) is fixedly mounted on the outer surface of the threaded rod (35).

6. A municipal water supply pipeline safety welding device according to claim 5, characterized in that: A fixed shaft (39) is fixedly mounted inside the fixed ring (38), a sliding sleeve (40) is rotatably connected to the outer surface of the fixed shaft (39), a welding gun (41) is fixedly mounted on the outer surface of the sliding sleeve (40), and two groups of adjustment mechanisms are provided, which are symmetrically arranged on the front and rear sides of the two groups of limit rings (15).

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