Centering welding tool for municipal pipeline construction

Abstract

The invention relates to the field of centering welding, in particular to a centering welding tool for municipal pipeline construction, which comprises a welding mechanism comprising a support frame, a support plate arranged at the top of the support frame, an air cylinder arranged at the center of the top of the support plate, a welding gun arranged on the air cylinder, and a driving part mounted on the side wall of the support frame, a follow-up part and a transmission part are arranged on the driving part; the centering mechanism comprises a gear ring in the follow-up part, a centering ring is arranged in the gear ring, a right-angle groove, a columnar groove and a cavity are formed in one side of the centering ring, a fixing pipe and a fixing block are connected to the centering ring, the fixing block is connected with a rotating part, an extending part is arranged in the columnar groove, and a clamping part and a limiting part are arranged on the extending part. The limiting part is connected with a reset part and a switching part. Through the arrangement of the welding mechanism and the centering mechanism, a worker can complete centering while fixing the pipeline, and the pipeline can be overturned immediately after being fixed, so that the working efficiency is higher.

Description

Technical Field

[0001] The invention relates to the field of centering welding, in particular to a centering welding tool for municipal pipeline construction. Background Art

[0002] During the municipal pipeline construction process, pipeline welding is required. In order to ensure the welding quality of the two pipes, tooling is required to clamp the two pipes, and during the clamping process, the pipes must be aligned to prevent misalignment during subsequent welding.

[0003] When existing welding tools are used to weld municipal pipelines, due to the different sizes of the pipelines, when conventional clamps are used for clamping, the contact area between the clamps and the pipeline is very small. After the pipeline is positioned, it is not convenient to rotate the pipeline, which results in inconvenience in comprehensive welding of the pipeline joints during the centering welding process. When it is necessary to drive the pipeline to rotate, the squeezing force on the pipeline is increased to drive the pipeline to rotate. When the squeezing force increases, the outer wall of the pipeline is easily damaged. Summary of the invention

[0004] In view of the problem in the above or prior art that when a conventional clamp is used for clamping, the contact surface between the clamp and the pipe is very small, and it is inconvenient to rotate the pipe after positioning the pipe, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a centering welding tool for municipal pipeline construction.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A centering welding tool for municipal pipeline construction, comprising: a welding mechanism, including a support frame, a support plate is arranged on the top of the support frame, a cylinder is arranged at the center position of the top of the support plate, a welding gun is arranged on the cylinder, a driving part is installed on the side wall of the support frame, and a follower and a transmission part are arranged on the driving part; a centering mechanism, including a gear ring inside the follower, a centering ring is arranged inside the gear ring, a right-angle groove is opened on the inner wall of the gear ring, a columnar groove and a chamber are opened on one side of the centering ring, a fixed tube and a fixed block are connected to the centering ring, the fixed block is connected to the rotating part, an extension part is arranged inside the columnar groove, a clamping part and a limiting part are arranged on the extension part, and a reset part and a switching part are connected to the limiting part.

[0007] As a preferred solution of the centering welding tooling for municipal pipeline construction of the present invention, the driving part includes a threaded rod on the side wall of the support frame, one end of the threaded rod is rotatably connected to the support frame, the other end of the threaded rod passes through the support frame and is connected to a turntable, and a moving block is arranged on the side wall of the threaded rod.

[0008] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the following part includes a first protective shell on the top of the moving block, and a second protective shell is connected to the side wall of the first protective shell.

[0009] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the transmission part includes a long rod on the support frame and a first tooth groove on the side wall of the long rod.

[0010] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the rotating part includes a rotating ring inside the gear ring, the end of the rotating ring is provided with a second tooth groove, the inner wall of the rotating ring is provided with an annular groove, and a part of the fixed block is located inside the annular groove.

[0011] As a preferred solution of the centering welding tooling for municipal pipeline construction of the present invention, the extending part includes a rotating tube inside the columnar groove, a tooth block is fixedly connected to the side wall of the rotating tube, the tooth block is located inside the chamber, and an extrusion tube is rotatably connected to the inner wall of the rotating tube.

[0012] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the clamping part includes an inclined rod on the side wall of the extruded tube, and a telescopic tube is arranged on the centering ring, one end of the telescopic tube is connected to the side wall of the inclined rod, and the end of the inclined rod is connected to a rubber belt.

[0013] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the limiting part includes a fixing ring on the inner wall of the rotating tube, an insert block is arranged inside the rotating tube, a slot and a slide groove are opened on the inner wall of the fixing ring, an insert rod is arranged inside the slot, a storage groove is arranged on the insert block, one end of the insert rod away from the slot extends to the inside of the storage groove and is connected to a booster spring, an inclined groove is arranged on the insert rod, a top pipe is arranged inside the storage groove, and a concave rod is connected to the top pipe.

[0014] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the reset part includes a first annular plate on the side wall of the plug block, the inner wall of the columnar groove is connected to a second annular plate, and the first annular plate is connected to a first spring.

[0015] As a preferred solution of the centering welding tool for municipal pipeline construction of the present invention, the switching part includes an arc groove and a long groove opened on the inner wall of the top pipe, a trigger rod is arranged inside the top pipe, a flip rod is connected to the side wall of the trigger rod, and one end of the trigger rod extends to the outside of the extrusion tube and is connected to the middle position of the rubber belt.

[0016] The beneficial effects of the centering welding tool for municipal pipeline construction of the present invention are as follows: through the setting of the welding mechanism and the centering mechanism, the staff can extrude and fix pipelines of different sizes, and at the same time, the contact surface with the pipeline is large, the friction force is large, and the damage to the outer wall of the pipeline is reduced, and it is easier to drive the pipeline to rotate. The centering is completed when the pipeline is extruded and fixed. At the same time, the staff only needs to drive the rotating ring separately to drive the pipeline to rotate immediately after the pipeline is extruded and fixed, which is convenient for subsequent welding of the pipeline. The operation is simple, and the staff can adjust the height of the welding gun according to the different sizes of pipelines. At the same time, after the pipeline is extruded and fixed, the two pipelines can be driven close to each other for convenient welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the centering welding tooling for municipal pipeline construction.

[0019] Figure 2 Schematic diagram of the interior of the first protective shell of the centering welding tooling for municipal pipeline construction.

[0020] Figure 3 Schematic diagram of the explosion of the centering mechanism of the centering welding tooling for municipal pipeline construction.

[0021] Figure 4 Schematic diagram of the cylindrical groove of the centering welding tooling for municipal pipeline construction.

[0022] Figure 5 Schematic diagram of the extension part of the centering welding tooling for municipal pipeline construction.

[0023] Figure 6 Schematic diagram of the interior of the rotating pipe of the centering welding tool for municipal pipeline construction.

[0024] Figure 7 Schematic diagram of the interior of the plug block of the centering welding tooling for municipal pipeline construction.

[0025] Figure 8 Schematic diagram of the trigger rod of the centering welding tooling for municipal pipeline construction.

[0026] In the figure: 10, support frame; 11, support plate; 12, cylinder; 13, welding gun; 14, driving part; 141, threaded rod; 142, turntable; 143, moving block; 15, follower; 151, first protective shell; 152, second protective shell; 16, transmission part; 161, long rod; 162, first tooth groove; 20. toothed ring; 21. centering ring; 22. right-angle groove; 23. columnar groove; 24. chamber; 25. fixed tube; 26. fixed block; 27. rotating part; 271. rotating ring; 272. second tooth groove; 273. annular groove; 28. extension part; 281. rotating tube; 282. tooth block; 283. extrusion tube; 29. ​​clamping part; 291. oblique rod; 292. telescopic tube; 293. rubber belt; 30. Limiting part; 301. Fixing ring; 302. Insert block; 303. Slot; 304. Slide groove; 305. Insert rod; 306. Pressure-boosting spring; 307. Inclined groove; 308. Push pipe; 309. Concave rod; 31. Reset part; 311. First annular plate; 312. Second annular plate; 313. First spring; 32. Switching part; 321. Arc groove; 322. Long groove; 323. Trigger rod; 324. Flip rod. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Reference Figures 1 to 8 The present technical solution provides a centering welding tool for municipal pipeline construction, including a welding mechanism and a centering mechanism, which can clamp municipal pipelines of different sizes. After the pipeline is clamped, the pipeline can be driven to rotate, which is convenient for the welding gun 13 to make a circular welding on the pipeline. When rotating in the opposite direction, the clamping of the pipeline can be immediately released, and the work efficiency is higher.

[0029] Furthermore, the welding mechanism can control the positions of the two pipes so that the ends of the two pipes are in contact to avoid desoldering during welding, and includes a support frame 10, a support plate 11 is arranged on the top of the support frame 10, a cylinder 12 is arranged at the center position of the top of the support plate 11, a welding gun 13 is arranged on the cylinder 12, a driving part 14 is installed on the side wall of the support frame 10, and a follower part 15 and a transmission part 16 are arranged on the driving part 14.

[0030] When in use, the cylinder 12 can drive the welding gun 13 to move up and down to weld pipes of different diameters.

[0031] Furthermore, the driving part 14 includes a threaded rod 141 on the side wall of the support frame 10, and a first thread and a second thread are arranged on the side wall of the threaded rod 141. The thread direction of the first thread is opposite to the thread direction of the second thread. One end of the threaded rod 141 is rotatably connected to the support frame 10, and the other end of the threaded rod 141 passes through the support frame 10 and is connected to a turntable 142. A moving block 143 is arranged on the side wall of the threaded rod 141. The number of the moving blocks 143 is two, and the two moving blocks 143 are respectively located on the first thread and the second thread.

[0032] During use, when the position of the moving block 143 is restricted, when the staff drives the turntable 142, the turntable 142 can drive the threaded rod 141 to rotate, so that the two moving blocks 143 on the threaded rod 141 are moved closer to each other or away from each other.

[0033] Furthermore, the follower 15 includes a first protective shell 151 on the top of the moving block 143, the moving block 143 is fixedly connected to the first protective shell 151, and a second protective shell 152 is connected to the side wall of the first protective shell 151. The number of the second protective shells 152 is two, and the two second protective shells are respectively located on both sides of the bottom of the first protective shell 151.

[0034] Furthermore, the transmission part 16 includes a long rod 161 on the support frame 10, and the number of the long rods 161 is two. The two long rods 161 are respectively rotatably connected to the support frame 10, and the two long rods 161 are respectively located on both sides of the threaded rod 141, and a first tooth groove 162 is provided on the side wall of the long rod 161. The number of the first tooth grooves 162 is multiple, and the multiple first tooth grooves 162 are evenly distributed on the side wall of the long rod 161.

[0035] It should be noted that the second protective shell 152 is sleeved on the side wall of the long rod 161. Through the setting of the first protective shell 151, the second protective shell 152 and the long rod 161, the position of the moving block 143 can be restricted. When the threaded rod 141 rotates, the moving block 143 cannot rotate with the threaded rod 141, and the moving block 143 can only move laterally.

[0036] Furthermore, the centering mechanism can squeeze and clamp municipal pipes of different sizes and keep the two pipes at the same height. At the same time, the clamping and rolling connection of the pipes are smooth, which is convenient for the staff to weld. It includes a toothed ring 20 inside the follower 15. The toothed ring 20 is located inside the first protective shell 151. The toothed ring 20 is meshed with the first tooth groove 162. The first protective shell 151 is provided to wrap the toothed ring 20 so that the toothed ring 20 can move with the first protective shell 151. During the movement of the toothed ring 20, the toothed ring 20 is always meshed with the first tooth groove 162. The interior of the toothed ring 20 is provided with a centering mechanism. The inner walls of the middle ring 21 and the gear ring 20 are provided with a right-angle groove 22, and a columnar groove 23 and a chamber 24 are provided on one side of the centering ring 21. The chamber 24 and the columnar groove 23 are interconnected. There are three columnar grooves 23 and three chambers 24, and the three columnar grooves 23 are evenly distributed on the gear ring 20. A fixing tube 25 and a fixing block 26 are connected to the centering ring 21. The fixing tube 25 is located inside the columnar groove 23. The fixing block 26 is connected to a rotating part 27. An extending part 28 is provided inside the columnar groove 23. A clamping part 29 and a limiting part 30 are provided on the extending part 28. A reset part 31 and a switching part 32 are connected to the limiting part 30.

[0037] Furthermore, the rotating part 27 includes a rotating ring 271 inside the gear ring 20, a second tooth groove 272 is provided at the end of the rotating ring 271, the second tooth groove 272 is located on the side adjacent to the centering ring 21, an annular groove 273 is provided on the inner wall of the rotating ring 271, and a part of the fixed block 26 is located inside the annular groove 273.

[0038] It should be noted that there are three fixed blocks 26, and the three fixed rings 301 are distributed in a circular array. Through the setting of the fixed block 26 and the annular groove 273, the position of the rotating ring 271 can be restricted, so that the rotating ring 271 can move with the first protective shell 151. At the same time, the rotating ring 271 can rotate when rotated by the staff.

[0039] Furthermore, the extension portion 28 includes a rotating tube 281 inside the columnar groove 23, and a tooth block 282 is fixedly connected to the side wall of the rotating tube 281. There are multiple tooth blocks 282, and the multiple tooth blocks 282 are evenly distributed on the side wall of the rotating tube 281. The tooth block 282 is located inside the chamber 24, and part of the tooth block 282 is located outside the chamber 24, and the tooth block 282 is meshed with the second tooth groove 272, and the inner wall of the rotating tube 281 is rotatably connected to the extrusion tube 283.

[0040] During use, when a worker drives the rotating ring 271 to rotate, the rotating ring 271 can drive the tooth block 282 to rotate, and the tooth block 282 drives the rotating tube 281 to rotate.

[0041] Furthermore, the clamping portion 29 includes an inclined rod 291 on the side wall of the extrusion tube 283. The number of the inclined rods 291 is two, and the two inclined rods 291 are evenly distributed on both sides of the extrusion tube 283. A telescopic tube 292 is arranged on the centering ring 21. The length direction of the telescopic tube 292 is parallel to the length direction of the extrusion tube 283. One end of the telescopic tube 292 is connected to the side wall of the inclined rod 291. The end of the inclined rod 291 is connected to a rubber belt 293, and the rubber belt 293 is located between the two inclined rods 291.

[0042] It should be noted that by providing the inclined rod 291 and the telescopic tube 292, the extrusion tube 283 can be prevented from rotating along with the rotating tube 281. When the ends of the two inclined rods 291 are in contact with the outer wall of the municipal pipeline, the inclined rod 291 can drive the rubber belt 293 to extend and contact with the outer wall of the pipeline, thereby applying a friction force to the outer wall of the pipeline through the rubber belt 293.

[0043] During use, when the rotating tube 281 rotates, the squeezing tube 283 can extend from the inside of the rotating tube 281 . When the squeezing tube 283 extends, it can drive the inclined rod 291 to move together, and the inclined rod 291 drives the telescopic tube 292 to extend.

[0044] Further, the limiting part 30 includes a fixing ring 301 on the inner wall of the rotating tube 281, the end face of the fixing ring 301 contacts the end face of the extrusion tube 283, and an insert block 302 is arranged inside the rotating tube 281. The insert block 302 is composed of a right-angle block and a short rod. The size of the right-angle block is adapted to the size of the right-angle groove 22. A slot 303 and a slide groove 304 are opened on the inner wall of the fixing ring 301. The slide groove 304 and the slot 303 are mutually connected. The number of the slot 303 and the slide groove 304 is evenly two, and the slot 303 is An insertion rod 305 is provided inside, and the insertion rod 305 can be moved from the slot 303 to the inside of the slide groove 304. A storage groove is provided on the insertion block 302. One end of the insertion rod 305 away from the slot 303 extends to the inside of the storage groove and is connected to a booster spring 306. An inclined groove 307 is provided on the insertion rod 305. A top pipe 308 is provided inside the storage groove. The top pipe 308 cannot be detached from the inside of the storage groove. A concave rod 309 is connected to the top pipe 308, and the protruding ends of the concave rod 309 are respectively in contact with the inclined groove 307.

[0045] When in use, when the top tube 308 drives the concave rod 309 to rise, it can drive the two insertion rods 305 to approach each other, and the two insertion rods 305 drive the booster spring 306 to contract, so that the two insertion rods 305 are disengaged from the inside of the slot 303.

[0046] Furthermore, the reset portion 31 includes a first annular plate 311 on the side wall of the insert block 302, the inner wall of the columnar groove 23 is connected to a second annular plate 312, the first annular plate 311 is connected to a first spring 313, and one end of the first spring 313 away from the first annular plate 311 is connected to the second annular plate.

[0047] It should be noted that when the insertion rod 305 is located inside the slot 303 , the first spring 313 is in an extended state.

[0048] When in use, when the insertion rod 305 is disengaged from the inside of the slot 303 driven by the concave rod 309, the first spring 313 recovers and can drive the first annular plate 311 to rise, and the first annular plate 311 drives the insertion block 302 to rise, and the insertion block 302 drives the insertion rod 305 from the slot 303 into the inside of the slide groove 304. By increasing the setting of the spring, the boost spring 306 recovers and drives the insertion rod 305 to squeeze the inner wall of the slide groove 304, thereby slowing down the recovery speed of the first spring 313, so that the insertion block 302 can slowly enter the inside of the right-angle groove 22, so that the gear ring 20 and the centering ring 21 are locked.

[0049] Furthermore, the switching part 32 includes an arc groove 321 and a long groove 322 opened on the inner wall of the top tube 308, the arc groove 321 and the long groove 322 are perpendicular to each other, and the arc groove 321 and the long groove 322 are interconnected, there are multiple arc grooves 321, and the multiple arc grooves 321 are evenly distributed on the inner wall of the top tube 308, a trigger rod 323 is arranged inside the top tube 308, a flip rod 324 is connected to the side wall of the trigger rod 323, the flip rod 324 is obliquely arranged on the side wall of the trigger rod 323, there are two flip rods 324, the two flip rods 324 are respectively located inside the two arc grooves 321, one end of the trigger rod 323 extends to the outside of the extrusion tube 283 and is connected to the middle position of the rubber belt 293.

[0050] It should be noted that when the top tube 308 moves downward, it can drive the flip rod 324 to flip upward, so that the flip rod 324 is disengaged from the inside of the arc groove 321. When the top tube 308 moves upward, it cannot drive the flip rod 324 to flip upward, and the flip rod 324 will be blocked by the arc groove 321.

[0051] When in use, when the inclined rod 291 drives the rubber belt 293 to move, the rubber belt 293 drives the trigger rod 323 to move together. At the same time, the trigger rod 323 drives the flip rod 324 to move between the plurality of arc grooves 321. When the inclined rod 291 gradually contacts the outer wall of the municipal pipe, the outer wall of the municipal pipe will squeeze the rubber belt 293, causing the rubber belt 293 to bend and drive the trigger rod 323 to retract. When the trigger rod 323 is retracted, it will drive the flip rod 324 to flip a certain distance. When the flip rod 324 flips to the maximum distance, the flip rod 324 cannot continue to flip because it is blocked by the arc groove 321. When the trigger rod 323 continues to be retracted, the trigger drives the flip rod 324, and the flip rod 324 drives the top pipe 308 to move, and the top pipe 308 drives the concave rod 309 to squeeze the two plug rods 305, so that the two plug rods 305 are disengaged from the inside of the slot 303 and the booster spring 306 is contracted, so that the plug block 302 is slowly inserted into the inside of the right-angle groove 22, so that the staff can continue to drive the rotating ring 271 during the movement of the plug block 302, so that the two ends of the inclined rod 291 are completely in contact with the outer wall of the municipal pipeline, which is convenient for squeezing and fixing the municipal pipeline, facilitating the centering between the municipal pipelines, and ensuring that subsequent welding continues.

[0052] Working principle: When two municipal pipelines need to be welded, the staff first inserts the two pipelines into the centering ring 21 respectively. At this time, the staff can rotate the two rotating rings 271 clockwise respectively. When the rotating ring 271 rotates, the rotating ring 271 can drive the tooth block 282 to rotate, and the tooth block 282 drives the rotating tube 281 to rotate. When the rotating tube 281 rotates, it can drive the extrusion tube 283 to extend from the inside of the rotating tube 281. The extrusion tube 283 drives the inclined rod 291 to approach the municipal pipeline, and the inclined rod 291 drives the rubber belt 293 to move. The rubber belt 293 The trigger rod 323 can be driven to move together, and the trigger rod 323 drives the flip rod 324 to move between the plurality of arc grooves 321. When the inclined rod 291 drives the rubber belt 293 to contact the outer wall of the municipal pipe, the inclined rod 291 can continue to approach the outer wall of the pipe due to the obstruction of the outer wall of the municipal pipe. At this time, the trigger rod 323 connected to the rubber belt 293 cannot continue to move forward due to the squeezing of the outer wall of the pipe and moves backward. When the trigger rod 323 moves backward, the flip rod 324 cannot be separated from the inner part of the arc groove 321, and the flip rod 324 will The push tube 308 is driven to move in the opposite direction, and the push tube 308 drives the concave rod 309 to squeeze the inclined groove 307, so that the two insertion rods 305 are close to each other, and the two insertion rods 305 drive the booster spring 306 to contract. When the two insertion rods 305 are completely separated from the inside of the slot 303, the first spring 313 recovers and drives the first annular plate 311 to rise, and the first annular plate 311 drives the insertion block 302 to rise, and the insertion block 302 drives the insertion rod 305 to rise on the inner wall of the slide groove 304. When the insertion block 302 rises, the concave rod 309 can be separated from the inside of the inclined groove 307, and the booster spring 306 The two insertion rods 305 are restored to squeeze the inner wall of the slide groove 304, increasing the friction between the insertion rod 305 and the slide groove 304, so that the first spring 313 is restored to drive the first annular plate 311 to rise slowly, and the first annular plate 311 drives the insertion block 302 to rise slowly. During the slow rise of the insertion block 302, it is convenient for the staff to continue to drive the rotating ring 271 to make the rotating tube 281 rotate, and the rotating tube 281 drives the extrusion tube 283 to move, and finally the extrusion tube 283 drives the inclined rod 291 to be extruded and contacted with the outer wall of the pipe, thereby completing the extrusion and fixation of the pipe.

[0053] At this time, the staff drives the turntable 142, which drives the threaded rod 141 to rotate, and adjusts the distance between the two moving blocks 143, so that the end faces of the two pipes are close to each other, which is convenient for subsequent staff to perform welding.

[0054] When the pipe is fixed, the first annular plate 311 drives the plug block 302 to rise and insert into the right-angle groove 22. When the staff continues to drive the rotating ring 271, the extrusion tube 283 has driven the inclined rod 291 to squeeze and fix the pipe, and the extrusion tube 283 cannot continue to extend, resulting in the rotation of the rotating tube 281. At this time, the rotating ring 271 drives the tooth block 282, the tooth block 282 drives the rotating tube 281, and the rotating tube 281 drives the fixed ring 301 and the extrusion tube 283 to rotate together, the fixed ring 301 drives the plug rod 305, and the plug rod 305 drives the plug block 303. 02, the plug block 302 drives the gear ring 20 to rotate. When the gear ring 20 rotates, it can drive the long rod 161 to rotate, so that the other gear ring 20 rotates together. Through the extrusion of the outer wall of the pipeline by the inclined rod 291 and the rubber belt 293, the extrusion tube 283 drives the inclined rod 291 and the rubber belt 293 to rotate together, thereby driving the pipeline to rotate, which is convenient for rolling the joint of the two pipelines. At this time, the staff lowers the height of the welding gun 13 through the cylinder 12, so that the welding gun 13 is located at the weld between the two pipelines, and starts the welding gun 13 to weld the two pipelines.

[0055] When the two pipes are welded, in order to quickly release the squeeze fixation of the pipes and continue welding the subsequent pipes, the staff first manually rotates the trigger rod 323, so that the trigger rod 323 drives the flip rod 324 to move from the inside of the arc groove 321 to the inside of the long groove 322, so that the trigger rod 323 can move inside the top pipe 308. At this time, the staff drives the rotating ring 271 counterclockwise, the rotating ring 271 drives the tooth block 282, and the tooth block 282 drives the rotating tube 281 to rotate, so that the squeezing tube 283 is collected in the rotating tube 281, the squeezing tube 283 drives the inclined rod 291, the inclined rod 291 drives the rubber belt 293, and the rubber belt 293 can drive the trigger rod 323 to move in the top pipe 308. The top of the plug block 302 moves. At the same time, since the plug block 302 is still located inside the right-angle groove 22, when the rotating ring 271 rotates, the inclined surface of the plug block 302 can squeeze the inclined surface of the right-angle groove 22, so that the plug block 302 drives the first annular plate 311 and the plug rod 305 to descend, and the first annular plate 311 drives the first spring 313 to extend. When the plug block 302 is disengaged from the right-angle groove 22, the plug rod 305 moves to the slot 303, and the booster spring 306 recovers to drive the plug rod 305 into the slot 303, completing the restriction on the plug block 302 and avoiding driving the gear ring 20 to rotate together, making it easier for the staff to drive the rotating ring 271. When the subsequent pipeline is squeezed and fixed, it only needs to drive the rotating ring 271.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A centering welding tool for municipal pipeline construction, characterized in that: include, A welding mechanism, comprising a support frame (10), a support plate (11) being arranged on the top of the support frame (10), a cylinder (12) being arranged at the center of the top of the support plate (11), a welding gun (13) being arranged on the cylinder (12), a driving part (14) being installed on the side wall of the support frame (10), and a follower part (15) and a transmission part (16) being arranged on the driving part (14); The centering mechanism comprises a toothed ring (20) inside the follower part (15), a centering ring (21) is arranged inside the toothed ring (20), a right-angle groove (22) is opened on the inner wall of the toothed ring (20), a columnar groove (23) and a chamber (24) are opened on one side of the centering ring (21), a fixing tube (25) and a fixing block (26) are connected to the centering ring (21), the fixing block (26) is connected to the rotating part (27), an extending part (28) is arranged inside the columnar groove (23), a clamping part (29) and a limiting part (30) are arranged on the extending part (28), and a reset part (31) and a switching part (32) are connected to the limiting part (30).

2. The centering welding tool for municipal pipeline construction according to claim 1, characterized in that: The driving part (14) comprises a threaded rod (141) on a side wall of the support frame (10); one end of the threaded rod (141) is rotatably connected to the support frame (10); the other end of the threaded rod (141) passes through the support frame (10) and is connected to a rotating disk (142); and a moving block (143) is provided on the side wall of the threaded rod (141).

3. The centering welding tool for municipal pipeline construction as claimed in claim 2, characterized in that: The follower part (15) comprises a first protective shell (151) at the top of the moving block (143), and a second protective shell (152) is connected to the side wall of the first protective shell (151).

4. The centering welding tool for municipal pipeline construction as claimed in claim 3, characterized in that: The transmission part (16) comprises a long rod (161) on the support frame (10) and a first tooth groove (162) on a side wall of the long rod (161).

5. The centering welding tool for municipal pipeline construction as claimed in claim 4, characterized in that: The rotating part (27) comprises a rotating ring (271) inside the gear ring (20), a second tooth groove (272) is provided at the end of the rotating ring (271), an annular groove (273) is provided on the inner wall of the rotating ring (271), and a part of the fixed block (26) is located inside the annular groove (273).

6. The centering welding tool for municipal pipeline construction as claimed in claim 5, characterized in that: The extending portion (28) comprises a rotating tube (281) inside the columnar groove (23), a tooth block (282) being fixedly connected to the side wall of the rotating tube (281), the tooth block (282) being located inside the chamber (24), and an extrusion tube (283) being rotatably connected to the inner wall of the rotating tube (281).

7. The centering welding tool for municipal pipeline construction as claimed in claim 6, characterized in that: The clamping portion (29) comprises an inclined rod (291) on the side wall of the extrusion tube (283); a telescopic tube (292) is provided on the centering ring (21); one end of the telescopic tube (292) is connected to the side wall of the inclined rod (291); and the end of the inclined rod (291) is connected to a rubber belt (293).

8. The centering welding tool for municipal pipeline construction as claimed in claim 7, characterized in that: The limiting portion (30) comprises a fixing ring (301) on the inner wall of the rotating tube (281); an insert block (302) is arranged inside the rotating tube (281); a slot (303) and a slide groove (304) are provided on the inner wall of the fixing ring (301); an insert rod (305) is arranged inside the slot (303); a storage groove is arranged on the insert block (302); an end of the insert rod (305) away from the slot (303) extends to the inside of the storage groove and is connected to a pressure-increasing spring (306); an inclined groove (307) is arranged on the insert rod (305); a top pipe (308) is arranged inside the storage groove; and a concave rod (309) is connected to the top pipe (308).

9. The centering welding tool for municipal pipeline construction as claimed in claim 8, characterized in that: The reset portion (31) comprises a first annular plate (311) on the side wall of the insert block (302), the inner wall of the columnar groove (23) is connected to a second annular plate (312), and the first annular plate (311) is connected to a first spring (313).

10. The centering welding tool for municipal pipeline construction according to claim 9, characterized in that: The switching portion (32) comprises an arc-shaped groove (321) and a long groove (322) formed on the inner wall of the top tube (308); a trigger rod (323) is provided inside the top tube (308); a flip rod (324) is connected to the side wall of the trigger rod (323); one end of the trigger rod (323) extends to the outside of the extrusion tube (283) and is connected to the middle position of the rubber belt (293).

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