Welding device for municipal road pipeline laying

Abstract

The invention discloses a welding device for municipal road pipeline laying, and particularly relates to the technical field of pipeline welding, the welding device comprises a movable base, positioning assemblies are arranged at the upper end of the movable base, a rotary welding assembly is arranged between the two positioning assemblies, and a grinding assembly is arranged at the upper end of the movable base. An air blowing assembly is arranged at the right end of the rotary welding assembly, and first supporting assemblies are arranged on the front side and the rear side of the movable base. On the premise that the positioning assembly does not need to be removed, synchronous treatment of butt joint positioning, grinding, cleaning and welding of the two steel pipes is achieved, gap deviation at the steel pipe connector is effectively reduced, a good foundation is created for welding, impurities and unevenness on the surface of the connector are removed, welding seams can be better fused, and the welding quality is improved. Meanwhile, scraps are removed in time, impurities are prevented from being mixed into welding seams, the construction efficiency is remarkably improved, and the labor intensity and the labor cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and particularly relates to a welding device for laying pipelines in municipal roads. Background Art

[0002] In the construction of municipal roads, pipeline laying is a crucial engineering link, involving the installation of various types of pipelines such as water supply and drainage pipelines, gas pipelines, and communication cable pipelines. The connection quality between pipelines directly affects the operation stability, safety, and service life of the entire pipeline system. Currently, at the welding construction site of municipal road pipelines, it is necessary to first use an aligner to align the two pipeline interfaces, then use a welding device to weld four points for limiting, and then remove the aligner and perform welding manually. The entire process is very complex and labor-consuming, and it has been difficult to meet the requirements of modern engineering construction.

[0003] Chinese Patent Publication No. CN221363390U discloses a welding device for thermal pipeline construction, including a workbench. A welding mechanism and a fixing mechanism are respectively arranged at the top end of the workbench; the welding mechanism includes an L-shaped plate, the L-shaped plate is arranged in the middle of the top end of the workbench, and a welding head is arranged on the inner wall of the top end of the L-shaped plate; the fixing mechanism includes a fixing block, the fixing block is arranged in the middle of the top end of the workbench, a first through groove is opened inside the fixing block, a connecting pipe is rotatably arranged inside the first through groove, the connecting pipe penetrates through the fixing block, a first gear is arranged on the surface of the connecting pipe, a fixing plate is arranged inside the connecting pipe, and a clamping plate is arranged on the fixing plate through a spring; the beneficial effect of the present invention is that when welding a thermal pipeline, the staff can drive the thermal pipeline to rotate through a motor, so as to change the welding points of the thermal pipeline, increase the welding area of the thermal pipeline, and ensure the welding quality of the thermal pipeline. However, in the prior art, when welding steel pipes at the construction site of pipeline laying, it is impossible to synchronously perform processes such as butt joint positioning and welding of the ports of two steel pipes. Summary of the Invention

[0004] The main purpose of the present invention is to provide a welding device for laying pipelines in municipal roads, which can effectively solve the problem that it is impossible to synchronously perform processes such as butt joint positioning and welding of steel pipes.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A welding device for laying pipelines in municipal roads includes a moving base. A through groove is opened at the upper end of the moving base. A positioning component is arranged at the upper end of the moving base. A rotary welding component is arranged at the middle position between the two positioning components. A grinding component is arranged at the upper end of the moving base. A blowing component is arranged at the right end of the rotary welding component. Support components I are arranged on the front and rear sides of the moving base. Support components II are jointly arranged on the left and right sides of the two support components I.

[0006] Preferably, the positioning assembly includes a first fixing block fixedly connected to the front and rear sides of the upper end of the moving base. Hydraulic devices are fixedly installed at the upper ends of the two first fixing blocks. Support frames one are fixedly connected to the left and right sides of the upper end of the moving base. Connecting frames one are fixedly connected to the front and rear sides of the mutually approaching surfaces of the two support frames one. The output ends of the two hydraulic devices pass through the inner surfaces of the two connecting frames one. Connecting frames two are fixedly connected to the output ends of the two hydraulic devices. Support frames two are fixedly connected to the left and right ends of the two connecting frames two distributed front and rear.

[0007] Preferably, a number of mounting blocks are annularly arrayed on the mutually approaching surfaces of the two support frames two. Threaded positioning bolts are threadedly connected inside the number of mounting blocks.

[0008] Preferably, the rotary welding assembly includes a motor fixedly installed inside the moving base. A first gear is fixedly connected to the output end of the motor. A first support base is fixedly connected to the upper end of the moving base. A second support base is fixedly connected to the upper end of the moving base and located at the right end of the first support base. An annular gear rack is slidably connected to the outer surfaces of the first support base and the second support base. Annular limiting grooves are opened at the left and right ends of the annular gear rack. The outer surface of the first gear is meshed with the annular gear rack. A laser welding head is fixedly installed on the inner surface of the annular gear rack.

[0009] Preferably, the grinding assembly includes an annular rack fixedly connected to the upper end of the first support base. A second gear is meshed with the outer surface of the annular rack. The lower end of the second gear is rotatably connected to the inner surface of the annular gear rack. A telescopic rod is fixedly connected to the upper end of the second gear. A grinding block is fixedly connected to the upper end of the telescopic rod.

[0010] Preferably, the air blowing assembly includes an annular frame fixedly connected to the upper end of the second support base. A limiting groove is opened on the surface of the annular frame close to the annular gear rack. An arc-shaped airbag is arranged inside the annular frame. A connecting block is fixedly connected to the inner surface of the annular gear rack and located on one side of the second gear. The outer surface of the connecting block is slidably connected to the limiting groove. A sliding block is slidably connected to the inner surface of the connecting block. An extrusion plate is fixedly connected to the end of the sliding block away from the connecting block. The outer surface of the extrusion plate is fixedly connected to one end of the arc-shaped airbag. A one-way valve is arranged at the end of the arc-shaped airbag close to the extrusion plate. The one-way valve penetrates the inner surface of the extrusion plate.

[0011] Preferably, the end of the arc-shaped airbag away from the extrusion plate is fixedly connected to the inner surface of the annular frame. A limiting bead is fixedly connected to the lower end of the extrusion plate. An arc-shaped groove is opened on the inner surface of the annular frame. The outer surface of the limiting bead is slidably connected to the arc-shaped groove.

[0012] Preferably, the first support assembly includes a second fixing block fixedly connected to the front ends of the two second support frames. A lower end of the second fixing block is fixedly connected to two pressing rollers. Both left and right ends of the moving base are fixedly connected to fixing seats. Upper ends of the two fixing seats are fixedly connected to rotating seats. Outer surfaces of the two rotating seats are rotatably connected to swinging seats.

[0013] Preferably, adjusting blocks are slidably connected to one ends of the two swinging seats away from each other. Card slots are formed in upper sides of one ends of the two swinging seats close to each other. Inner surfaces of the two card slots are slidably connected to the two pressing rollers. Upper ends of the two fixing seats are fixedly connected to limiting columns. Outer surfaces of the two limiting columns are slidably connected to sliding seats. One ends of the two sliding seats away from each other are fixedly connected to connecting seats.

[0014] Preferably, the second support assembly includes a support seat fixedly connected to the two connecting seats on the same side. Upper ends of the support seat are fixedly connected to a plurality of springs. Upper ends of the plurality of springs are fixedly connected to a buffer plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the cooperation between various components, the present invention realizes the synchronous processing of butt joint positioning, grinding, cleaning and welding of two steel pipes without removing the positioning component. It effectively reduces the gap deviation at the interface of the steel pipes, creates a good foundation for welding, removes impurities and unevenness on the interface surface, enables the welds to better fuse, and also timely removes waste chips to avoid impurities mixing into the welds, significantly improving the construction efficiency, reducing the labor intensity and labor cost.

[0016] 2. Through the cooperation between the rotary welding component and the grinding component, the present invention first grinds the connection part of the two steel pipes before welding, quickly removes impurities and rust on the pipe interface, and synchronously drives the air blowing component on one side to blow away the waste chips generated during grinding during the rotation process, timely removing the waste chips, ensuring the cleanliness of the pipe interface, preventing it from affecting the subsequent welding quality, and finally rotating in the reverse direction to weld the processed steel pipes, overall improving the work efficiency, shortening the project cycle, and reducing the labor cost and equipment loss.

[0017] 3. Through the cooperation between the positioning component and the first support component, when the first support frame and the second support frame approach each other, the two second support components on both sides are synchronously lifted, providing a stable supporting force for the bottom sides of the two steel pipes. It not only considers the horizontal alignment of the pipes but also takes into account the vertical stability of the pipes, ensuring that the pipes are always in a stable state during the welding process, effectively reducing weld defects caused by pipe instability, such as weld cracks, lack of fusion and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the positioning component of the present invention; Figure 3 It is a partial schematic diagram of the structure of the rotary welding component of the present invention; Figure 4 It is a schematic diagram of the structure of the annular limiting groove of the present invention; Figure 5 It is a schematic diagram of the structure of the rotary welding component of the present invention; Figure 6 It is a schematic diagram of the structure of the grinding component of the present invention; Figure 7 It is a schematic diagram of the structure of the annular frame of the present invention; Figure 8 It is a schematic diagram of the internal structure of the annular frame of the present invention; Figure 9 It is a partial schematic diagram of the structure of the air blowing component of the present invention; Figure 10 It is a schematic diagram of the structure of the first support component of the present invention; Figure 11 It is a schematic diagram of another state structure of the first support component of the present invention; Figure 12 It is a partial schematic diagram of the structure of the first support component of the present invention.

[0019] In the figure: 1. Moving base; 11. Through groove; 2. Positioning component; 21. First fixing block; 22. Hydraulic device; 23. First support frame; 231. First connecting frame; 24. Second support frame; 241. Second connecting frame; 25. Mounting block; 26. Threaded positioning bolt; 3. Rotary welding component; 31. Motor; 32. First gear; 33. Annular gear rack; 331. Annular limiting groove; 34. First support base; 35. Second support base; 36. Laser welding head; 4. Grinding component; 41. Annular rack; 42. Second gear; 43. Expansion rod; 44. Grinding block; 5. Air blowing component; 51. Annular frame; 511. Limiting groove; 52. Arc-shaped airbag; 53. Connecting block; 531. Sliding block; 54. Extrusion plate; 541. Limiting bead; 55. Check valve; 56. Arc-shaped groove; 6. First support component; 61. Second fixing block; 62. Pressing roller; 63. Fixed seat; 64. Rotating seat; 65. Oscillating seat; 651. Adjusting block; 652. Card slot; 66. Limiting column; 67. Sliding seat; 68. Connecting seat; 7. Second support component; 71. Support seat; 72. Spring; 73. Buffer plate. Detailed implementation manners

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0021] Embodiment 1, as Figure 1-2 shown, a welding device for municipal road pipeline laying includes a moving base 1. A through groove 11 is opened at the upper end of the moving base 1. A positioning assembly 2 is arranged at the upper end of the moving base 1. A rotary welding assembly 3 is arranged at the middle position between the two positioning assemblies 2. A grinding assembly 4 is arranged at the upper end of the moving base 1. A blowing assembly 5 is arranged at the right end of the rotary welding assembly 3. Support assemblies one 6 are arranged on the front and rear sides of the moving base 1. Support assemblies two 7 are jointly arranged on the left and right sides of the two support assemblies one 6.

[0022] Therefore, through the cooperation between various components in this solution, without removing the positioning assembly 2, the synchronous processing of butt joint positioning, grinding, cleaning and welding of two steel pipes is realized, effectively reducing the gap deviation at the interface of the steel pipes, creating a good foundation for welding, removing impurities and unevenness on the surface of the interface, enabling better fusion of the weld seams, and at the same time timely removing waste chips to avoid impurity mixing into the weld seams, significantly improving the construction efficiency, reducing the labor intensity and labor costs.

[0023] Embodiment 2, on the basis of Embodiment 1, to achieve the effect of grinding and cleaning the steel pipes synchronously before welding.

[0024] Refer to Figure 1-9 , the positioning assembly 2 includes fixing blocks one 21 fixedly connected to the front and rear sides of the upper end of the moving base 1. Hydraulic devices 22 are fixedly installed at the upper ends of the two fixing blocks one 21. Support frames one 23 are fixedly connected to the left and right sides of the upper end of the moving base 1. Connecting frames one 231 are jointly fixedly connected to the front and rear sides of the mutually approaching surfaces of the two support frames one 23. The output ends of the two hydraulic devices 22 pass through the inner surfaces of the two connecting frames one 231. The output ends of the two hydraulic devices 22 are fixedly connected to connecting frames two 241. Support frames two 24 are jointly fixedly connected to the left and right ends of the two connecting frames two 241 distributed front and rear.

[0025] A number of mounting blocks 25 are annularly arrayed on the mutually approaching surfaces of the two support frames two 24. Threaded positioning bolts 26 are threadedly connected inside the number of mounting blocks 25.

[0026] Specifically, the above-mentioned support frames one 23 and support frames two 24 can clamp and position the steel pipes; Further, move the whole device to one end of the pipeline to be welded, then pass it through the pipeline and move it to the connection of the two pipelines. Immediately start the first fixing block 21 to drive the second connecting frame 241 at the upper end and the second support frame 24 to descend, so that the first support frame 23 and the second support frame 24 firmly clamp and align the ports of the two pipelines. Then rotate a number of threaded positioning bolts 26 so that they all abut against the pipeline, preventing the connection of the two pipelines from shifting.

[0027] In the laying of municipal road pipelines, the accurate alignment of pipeline joints is crucial for subsequent welding and the normal operation of the entire pipeline system, which can effectively reduce the occurrence of problems such as leakage.

[0028] Refer to Figure 3-5 , the rotary welding assembly 3 includes a motor 31 fixedly installed inside the moving base 1. The output end of the motor 31 is fixedly connected with a first gear 32. The upper end of the moving base 1 is fixedly connected with a first support base 34. The upper end of the moving base 1 and on the right side of the first support base 34 is fixedly connected with a second support base 35. The outer surfaces of the first support base 34 and the second support base 35 are jointly slidably connected with an annular gear rack 33. Annular limit grooves 331 are opened at both the left and right ends of the annular gear rack 33. The outer surface of the first gear 32 is meshed with the annular gear rack 33. A laser welding head 36 is fixedly installed on the inner surface of the annular gear rack 33.

[0029] Further, the annular limit groove 331 on the left side of the annular gear rack 33 is slidably connected with the outer surface of the first support base 34, and the annular limit groove 331 on the right side of the annular gear rack 33 is slidably connected with the second support base 35. The two ensure that the annular gear rack 33 can rotate stably as a whole, and the laser welding head 36 can be driven to rotate together during the rotation process.

[0030] Further, the laser welding head 36 belongs to the prior art. The laser welding head 36 is electrically connected to the terminal control system in the prior art. When welding the connection of two steel pipes, the terminal control system will drive the laser welding head 36 to actively approach the weld between the two steel pipes, and then the continuously output high-energy laser beam is focused on the connection of the steel pipes, causing the metal at this part to quickly absorb the laser energy and reach the melting point or even the boiling point. The metal melts to form a molten pool. As the laser welding head 36 rotates around the steel pipe, the molten pool continuously expands forward and then cools and solidifies, thus firmly connecting the two steel pipes together to form a continuous weld.

[0031] Refer to Figure 5-6 , the grinding assembly 4 includes an annular rack 41 fixedly connected to the upper end of the first support base 34. The outer surface of the annular rack 41 is meshed with a second gear 42. The lower end of the second gear 42 is rotatably connected to the inner surface of the annular gear rack 33. The upper end of the second gear 42 is fixedly connected with a telescopic rod 43. The upper end of the telescopic rod 43 is fixedly connected with a grinding block 44.

[0032] Furthermore, the telescopic rod 43 is electrically connected to the terminal control system, and the distance between the grinding block 44 and the steel pipe can be controlled according to different situations.

[0033] Furthermore, according to the terminal control system, the telescopic rod 43 is activated to drive the grinding block 44 to fit the connection of the two steel pipes. Then, the motor 31 is activated to rotate the first gear 32. The first gear 32 meshes with the annular gear rack 33, and the annular gear rack 33 rotates. During the rotation process, the annular gear rack 33 drives the second gear 42, the telescopic rod 43 and the grinding block 44 to rotate together, so that the second gear 42 meshes with the left annular rack 41, and the second gear 42, the telescopic rod 43 and the grinding block 44 rotate rapidly to grind the outer surface of the connection of the two steel pipes, quickly removing impurities, rust, etc. at the pipe interface, providing good surface conditions for subsequent welding.

[0034] Refer to Figure 5-9 , the air blowing assembly 5 includes an annular frame 51 fixedly connected to the upper end of the second support base 35. A limiting groove 511 is formed on one side of the annular frame 51 close to the annular gear rack 33. An arc-shaped airbag 52 is arranged inside the annular frame 51. A connecting block 53 is fixedly connected to the inner surface of the annular gear rack 33 and on one side of the second gear 42. The outer surface of the connecting block 53 is slidably connected to the limiting groove 511. A sliding block 531 is slidably connected to the inner surface of the connecting block 53. One end of the sliding block 531 away from the connecting block 53 is fixedly connected to a pressing plate 54. The outer surface of the pressing plate 54 is fixedly connected to one end of the arc-shaped airbag 52. A one-way valve 55 is arranged at one end of the arc-shaped airbag 52 close to the pressing plate 54, and the one-way valve 55 penetrates the inner surface of the pressing plate 54.

[0035] Furthermore, the above-mentioned arc-shaped airbag 52 is arc-shaped, and the overall length is more than one full circle by a section, so that the pressing plate 54 can rotate one full circle together with the grinding block 44, and the arc-shaped airbag 52 can blow air during the grinding of an entire steel pipe. Among them, the one-way valve 55 can only blow air out and cannot intake air.

[0036] One end of the arc-shaped airbag 52 away from the pressing plate 54 is fixedly connected to the inner surface of the annular frame 51. A limiting bead 541 is fixedly connected to the lower end of the pressing plate 54. An arc-shaped groove 56 is formed on the inner surface of the annular frame 51, and the outer surface of the limiting bead 541 is slidably connected to the arc-shaped groove 56.

[0037] Furthermore, the arc of the arc-shaped groove 56 is the same as that of the arc-shaped airbag 52. Because the arc-shaped airbag 52 is a little more than a full circle in arc shape, there is an overlapping part, that is, a deviation in position. Therefore, when the pressing plate 54 squeezes the arc-shaped airbag 52, the limiting bead 541 needs to slide in the arc-shaped groove 56, so that the pressing plate 54 rotates along the trajectory of the arc-shaped airbag 52, always maintaining the squeezing of the arc-shaped airbag 52.

[0038] One end of the arc-shaped airbag 52 is provided with a one-way valve, which can only intake air and cannot exhaust air; The arc-shaped airbag 52 is made of ceramic fiber-reinforced silica gel, which has both flexibility and high temperature resistance; Furthermore, when the annular gear rack 33 rotates to drive the second gear 42 to mesh with the annular rack 41, the connecting block 53, the sliding block 531 and the pressing plate 54 on one side of the second gear 42 will move together, thereby squeezing the arc-shaped airbag 52. The air pressure inside the arc-shaped airbag 52 increases, and the gas inside it is ejected through the one-way valve 55. And the one-way valve 55 is always located on one side of the grinding block 44, blowing away the waste chips generated during grinding, preventing the waste chips from accumulating at the pipe interface and affecting the grinding effect and the subsequent welding quality; Then after the grinding is completed, the laser welding head 36 and the motor 31 are started. The laser welding head 36 starts to weld, and then the motor 31 drives the first gear 32 and the annular gear rack 33 to rotate in the opposite direction. The pressing plate 54 synchronously pulls the arc-shaped airbag 52 to expand. The air pressure inside the arc-shaped airbag 52 decreases. At this time, the arc-shaped airbag 52 will be inflated through the one-way valve at the other end. After rotating to the initial position, a whole circle of steel pipe welding is completed.

[0039] Therefore, through the cooperation of the rotary welding assembly 3 and the grinding assembly 4 in this solution, the connection part of the two steel pipes is ground before welding, quickly removing impurities and rust on the pipe interface, and synchronously driving the air blowing assembly 5 on one side to blow away the waste chips generated during grinding during the rotation process, timely removing the waste chips, ensuring the cleanliness of the pipe interface, preventing it from affecting the subsequent welding quality, and finally rotating in the opposite direction to weld the processed steel pipes, which overall improves the work efficiency, shortens the project cycle, and reduces the labor cost and equipment loss.

[0040] Embodiment 3. On the basis of Embodiment 1 and 2, this embodiment is to achieve the effect of increasing the stability of the butt joint of the steel pipe.

[0041] Refer to Figure 1 、 Figure 10-12 The first support assembly 6 includes a second fixing block 61 fixedly connected to the front ends of the two second support frames 24. Two pressure rollers 62 are fixedly connected to the lower end of the second fixing block 61. Fixed seats 63 are fixedly connected to the left and right ends of the moving base 1. Rotating seats 64 are fixedly connected to the upper ends of the two fixed seats 63. Swing seats 65 are rotatably connected to the outer surfaces of the two rotating seats 64.

[0042] Adjusting blocks 651 are slidably connected to the ends of the two swinging seats 65 that are away from each other. Card slots 652 are formed on the upper sides of the ends of the two swinging seats 65 that are close to each other. The inner surfaces of the two card slots 652 are slidably connected to the two pressure rollers 62. Limit posts 66 are fixedly connected to the upper ends of the two fixed seats 63. Sliding seats 67 are slidably connected to the outer surfaces of the two limit posts 66. Connecting seats 68 are fixedly connected to the ends of the two sliding seats 67 that are away from each other.

[0043] Further, when the second fixing block 61 descends to the lowest end, the second support frame 24 and the first support frame 23 also clamp the steel pipe. At this time, the pressure roller 62 is stuck in the card slot 652 and will not separate from the swinging seat 65.

[0044] Refer to Figure 10 And Figure 11 , the second support assembly 7 includes a support seat 71 fixedly connected to the two connecting seats 68 on the same side. A plurality of springs 72 are fixedly connected to the upper end of the support seat 71. A buffer plate 73 is fixedly connected to the upper ends of the plurality of springs 72 together.

[0045] Specifically, the springs 72 and the buffer plate 73 can provide buffering; Furthermore, the second fixing block 61 rises and falls together with the second support frame 24. When the hydraulic device 22 drives the second support frame 24 to lower into the well to clamp the steel pipe, the second fixing block 61 synchronously descends to drive the pressure roller 62 to squeeze the swinging seat 65, causing one end of the swinging seat 65 to descend and the other end to lift. The lifted end of the swinging seat 65 will synchronously drive the sliding seat 67 and the connecting seat 68 to rise, thereby driving the support seat 71, the springs 72 and the buffer plate 73 to rise together and abut against the lower ends of the two steel pipes, providing a supporting force to the two sides of the bottoms of the two steel pipes to prevent the pipeline from displacing or deforming due to uneven stress during the welding process.

[0046] Therefore, through the cooperation of the positioning assembly 2 and the first support assembly 6, this solution drives the two second support assemblies 7 on both sides to lift synchronously during the approaching process of the first support frame 23 and the second support frame 24, providing a stable supporting force to the two sides of the bottoms of the two steel pipes. It not only considers the horizontal alignment of the pipeline but also takes into account the vertical stability of the pipeline, ensuring that the pipeline is always in a stable state during the welding process, effectively reducing weld defects caused by pipeline instability, such as weld cracks, lack of fusion, etc.

[0047] It should be particularly noted that the specific installation methods of the hydraulic device 22, the motor 31, the laser welding head 36 and the telescopic rod 43, the connection method of the circuit and the control method adopted in the present invention are all conventional designs, and the present invention will not elaborate in detail.

[0048] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A welding device for laying municipal road pipelines, comprising a moving base (1), characterized in that: A through groove (11) is formed at the upper end of the moving base (1). A positioning component (2) is arranged at the upper end of the moving base (1). A rotary welding component (3) is arranged at the middle position between the two positioning components (2). A grinding component (4) is arranged at the upper end of the moving base (1). A blowing component (5) is arranged at the right end of the rotary welding component (3). Support components one (6) are arranged on the front and rear sides of the moving base (1). Support components two (7) are jointly arranged on the left and right sides of the two support components one (6).

2. The welding device for laying municipal road pipelines according to claim 1, wherein: The positioning component (2) includes fixing blocks one (21) fixedly connected to the front and rear sides of the upper end of the moving base (1). Hydraulic devices (22) are fixedly installed at the upper ends of the two fixing blocks one (21). Support frames one (23) are fixedly connected to the left and right sides of the upper end of the moving base (1). Connecting frames one (231) are jointly and fixedly connected to the front and rear sides of the surfaces of the two support frames one (23) close to each other. The output ends of the two hydraulic devices (22) pass through the inner surfaces of the two connecting frames one (231). Connecting frames two (241) are fixedly connected to the output ends of the two hydraulic devices (22). Support frames two (24) are jointly and fixedly connected to the left and right ends of the two connecting frames two (241) distributed front and rear.

3. The welding device for municipal road pipeline laying according to claim 2, characterized in that: A plurality of mounting blocks (25) are annularly arranged on the surfaces of the two support frames two (24) close to each other. Threaded positioning bolts (26) are threadedly connected inside the plurality of mounting blocks (25).

4. A welding device for laying municipal road pipelines according to claim 1, characterized in that: The rotary welding component (3) includes a motor (31) fixedly installed inside the moving base (1). A gear one (32) is fixedly connected to the output end of the motor (31). A support base one (34) is fixedly connected to the upper end of the moving base (1). A support base two (35) is fixedly connected to the upper end of the moving base (1) and at the right end of the support base one (34). An annular gear rack (33) is slidably connected to the outer surfaces of the support base one (34) and the support base two (35). Annular limiting grooves (331) are formed at the left and right ends of the annular gear rack (33). The outer surface of the gear one (32) is meshed with the annular gear rack (33). A laser welding head (36) is fixedly installed on the inner surface of the annular gear rack (33).

5. A welding device for laying municipal road pipelines according to claim 4, characterized in that: The grinding component (4) includes an annular rack (41) fixedly connected to the upper end of the support base one (34). A gear two (42) is meshed with the outer surface of the annular rack (41). The lower end of the gear two (42) is rotatably connected to the inner surface of the annular gear rack (33). A telescopic rod (43) is fixedly connected to the upper end of the gear two (42). A grinding block (44) is fixedly connected to the upper end of the telescopic rod (43).

6. The welding device for laying municipal road pipelines according to claim 5, characterized in that: The air blowing assembly (5) includes an annular frame (51) fixedly connected to the upper end of the second support base (35). A limiting groove (511) is formed on the side of the annular frame (51) close to the annular gear frame (33). An arc-shaped airbag (52) is arranged inside the annular frame (51). A connecting block (53) is fixedly connected to the inner surface of the annular gear frame (33) and on one side of the second gear (42). The outer surface of the connecting block (53) is slidably connected to the limiting groove (511). A sliding block (531) is slidably connected to the inner surface of the connecting block (53). One end of the sliding block (531) away from the connecting block (53) is fixedly connected to a pressing plate (54). The outer surface of the pressing plate (54) is fixedly connected to one end of the arc-shaped airbag (52). A one-way valve (55) is arranged at one end of the arc-shaped airbag (52) close to the pressing plate (54). The one-way valve (55) penetrates through the inner surface of the pressing plate (54).

7. A welding device for laying municipal road pipelines according to claim 6, characterized in that: One end of the arc-shaped airbag (52) away from the pressing plate (54) is fixedly connected to the inner surface of the annular frame (51). A limiting bead (541) is fixedly connected to the lower end of the pressing plate (54). An arc-shaped groove (56) is formed on the inner surface of the annular frame (51). The outer surface of the limiting bead (541) is slidably connected to the arc-shaped groove (56).

8. The welding device for laying municipal road pipelines according to claim 2, characterized in that: The first support assembly (6) includes a second fixing block (61) fixedly connected to the front ends of two second support frames (24). Two pressing rollers (62) are fixedly connected to the lower end of the second fixing block (61). Fixing seats (63) are fixedly connected to the left and right ends of the moving base (1). Rotating seats (64) are fixedly connected to the upper ends of the two fixing seats (63). Swing seats (65) are rotatably connected to the outer surfaces of the two rotating seats (64).

9. The welding device for laying municipal road pipelines according to claim 8, characterized in that: Adjusting blocks (651) are slidably connected to the mutually remote ends of the two swing seats (65). Card slots (652) are formed on the upper sides of the mutually close ends of the two swing seats (65). The inner surfaces of the two card slots (652) are slidably connected to the two pressing rollers (62). Limiting columns (66) are fixedly connected to the upper ends of the two fixing seats (63). Sliding seats (67) are slidably connected to the outer surfaces of the two limiting columns (66). Connecting seats (68) are fixedly connected to the mutually remote ends of the two sliding seats (67).

10. A welding device for laying municipal road pipelines according to claim 9, characterized in that: The second support assembly (7) includes a support seat (71) fixedly connected to two connecting seats (68) on the same side. A plurality of springs (72) are fixedly connected to the upper end of the support seat (71). A buffer plate (73) is fixedly connected to the upper ends of the plurality of springs (72).

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