CN117773404B

CN117773404B - Multistage welding equipment and method for corrugated pipe

Info

Publication number: CN117773404B
Application number: CN202410222399.1A
Authority: CN
Inventors: 李自强; 田青华; 张智贤; 赵沁逸
Original assignee: Jiangsu Aidi Electromechanical Equipment Industry Co ltd
Current assignee: Jiangsu Aidi Electromechanical Equipment Industry Co ltd
Priority date: 2024-02-28
Filing date: 2024-02-28
Publication date: 2024-05-17
Anticipated expiration: 2044-02-28
Also published as: CN117773404A

Abstract

The invention relates to the technical field of corrugated pipe welding, and discloses a corrugated pipe multistage welding device and a corrugated pipe multistage welding method. In the invention, in the process of multistage welding, the position of the first-stage corrugated pipe is determined and placed through the cooperation between the clamping structure and the calibration structure, the second-stage corrugated pipe is taken through the cooperation between the clamping structure and the tensioning structure, and the second-stage corrugated pipe is assembled and welded with the first-stage corrugated pipe with the determined position after the second-stage corrugated pipe is taken, so that the joint in the middle of the multistage corrugated pipe is welded with high efficiency.

Description

Multistage welding equipment and method for corrugated pipe

Technical Field

The invention relates to the technical field of corrugated pipe welding, in particular to a multistage welding device and method for corrugated pipes.

Background

The multi-stage corrugated pipes means that the corrugated pipes of different stages are combined together by welding.

In the prior art, two corrugated pipes with different diameters are connected through a flange in the welding process, the welded corrugated pipes are usually positioned in the welding process, after the first-stage corrugated pipe and the flange are welded, the second-stage corrugated pipe is required to be assembled with the first-stage corrugated pipe and then welded, the position of the corrugated pipes is required to be repeatedly replaced in the welding process, the welding positions of the corrugated pipes are required to be adjusted, clamps with different specifications are required to be used for clamping the corrugated pipes with different diameters in the clamping process, and when the second-stage corrugated pipes are overlong, the corrugated pipes are required to be restrained and fixed through an auxiliary structure, so that the output efficiency in actual production and processing is low.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art and provides a multistage welding device and a multistage welding method for a corrugated pipe.

In order to achieve the above purpose, the invention adopts the following technical scheme that the multi-stage welding equipment for the corrugated pipe comprises a first fixed base, a multifunctional driving component and a corrugated pipe component, wherein the multifunctional driving component is fixedly arranged on the side edge of the first fixed base, the corrugated pipe component is arranged above the first fixed base, a fixed calibration structure is arranged above the first fixed base, the output end of the multifunctional driving component is provided with a movable clamping structure corresponding to the upper part of the first fixed base, the upper part of the first fixed base is provided with a movable tensioning structure corresponding to the outer side of the corrugated pipe component, the calibration structure comprises a fixed ring fixedly connected to the upper side of the first fixed base, the upper end of the fixed ring is provided with a first movable cavity, the inside of the first movable cavity is provided with a movable ring which moves up and down, the inner side of the fixed ring is provided with a plurality of first extrusion blocks which synchronously swing through the extrusion of the movable ring, the clamping structure comprises a clamping ring movably arranged at the output end of the multifunctional driving assembly, the clamping ring is a hollow circular ring, the inner side of the clamping ring is movably provided with a gear ring which rotates, the inner side of the clamping ring is provided with a second installation cavity, the inner side of the gear ring corresponds to the position of the second installation cavity, the inner side of the second installation cavity is movably provided with a third extrusion block which is triggered by the connection protrusion, the tensioning structure comprises a first fixed column, the first fixed column is movably arranged in the clamping structure, the lower end of the first fixed column is fixedly connected with a second fixed column, one end of the second fixed column, which is far away from the first fixed column, is fixedly connected with a mounting disc, the outer side of the mounting disc is provided with a transversely moving block, the moving block is at least three, the bottom side of mounting disc is provided with the structure of polishing.

Preferably, the multifunctional driving assembly comprises a second fixing base, a movable first driving unit is arranged on the upper side of the second fixing base, a movable second driving unit is arranged above the first driving unit, driving columns are fixedly connected to the output ends of the first driving unit and the second driving unit, the corrugated pipe assembly comprises a first-stage corrugated pipe, a first connecting flange, a connecting ring, a welding groove, a second connecting flange, a second-stage corrugated pipe, a welding pipe and a third connecting flange, the first connecting flange is movably arranged in the fixing ring, the lower end of the first-stage corrugated pipe is fixedly connected to the inner part of the first connecting flange, the welding groove is fixedly connected to the upper end of the connecting ring, the second connecting flange is fixedly connected to the outer side of the connecting ring, the upper end of the first-stage corrugated pipe is welded to the position of the connecting ring corresponding to the welding groove, the two ends of the second-stage corrugated pipe are fixedly connected with welding pipes, the welding pipe is welded to the outer side of the second connecting flange, and the side surface of the first driving unit is fixedly provided with a workbench for placing the first-stage corrugated pipe and the second-stage corrugated pipe.

Preferably, the first movable cavity is a circular cavity, the movable ring is a circular ring, the bottom side equidistant circumference of the movable ring is fixedly connected with a first connecting spring, one end of the first connecting spring, which is far away from the movable ring, is fixedly connected with the inner bottom side of the first movable cavity, the inner side equidistant circumference of the fixed ring is provided with a first rotating cavity, the inner side of the fixed ring is positioned at one side of the first rotating cavity, the inner side of the fixed ring is positioned at the other side of the first rotating cavity, a second guiding cavity is provided with a second guiding cavity, a first rotating column is movably arranged in the first rotating cavity, the side of the first rotating column is fixedly connected with a second extruding block corresponding to the position of the first guiding cavity, and the second extruding block is an L-shaped block.

Preferably, the side surface of the first rotating cavity is provided with two second rotating cavities corresponding to the wall surface of the fixed ring, the two sides of the first rotating column are fixedly connected with second rotating columns movably mounted in the second rotating cavities corresponding to the second rotating cavities, one side of the second rotating column away from the first rotating column is fixedly connected with a first connecting torsion spring, and one end of the first connecting torsion spring away from the first rotating column is fixedly connected with the side surface of the second rotating cavity.

Preferably, the second movable cavity is circumferentially arranged at the upper end of the movable ring at equal intervals, the fixed spring is fixedly connected to the inner bottom side of the second movable cavity, the movable column is movably arranged in the second movable cavity, the lower end of the movable column is fixedly connected with the upper end of the fixed spring, the upper end of the movable column is fixedly connected with the extension block, the clamping cavity is arranged at the inner side of the second movable cavity corresponding to the position of the movable column, the first installation cavity is arranged at one side of the movable column corresponding to the clamping cavity, the second connection spring is fixedly connected to the inner side of the first installation cavity, and the clamping ball is fixedly connected to the end face of the second connection spring.

Preferably, the clamping structure further comprises an installation box, the installation box is fixedly connected to the side face of the driving column, the upper end of the installation box is fixedly connected with a connecting plate, the clamping ring is fixedly connected to the lower side of the connecting plate, the lower side of the connecting plate corresponds to the side face of the installation box, a third rotating cavity is formed in the upper side of the connecting plate, the upper side of the connecting plate corresponds to the position of the third rotating cavity, the first rotating motor is fixedly connected to the position of the third rotating cavity, the output end of the first rotating motor is fixedly connected with a second rotating shaft, the second rotating shaft penetrates through the third rotating cavity and extends to the inside of the installation box, one end of the second rotating shaft, far away from the first rotating motor, corresponds to the driving gear, a first adapting groove is formed in the side face of the clamping ring, corresponding to the position of the driving gear, and the driving gear is meshed with the gear ring gear.

Preferably, the inside movable mounting in second installation cavity has the dwang, the third movable cavity has all been seted up to the side in second installation cavity corresponds the both ends of dwang, the terminal surface in dwang corresponds the first rotation axis of the position fixedly connected with in third movable cavity, first rotation axis movable mounting is in the inside in third movable cavity, the one end fixedly connected with second connection torsional spring of dwang is kept away from to first rotation axis, the one end fixedly connected with in third movable cavity is kept away from to the second connection torsional spring, the position fixedly connected with contact block of connecting the lug is kept away from to the dwang side, third extrusion piece fixed connection is kept away from one side of contact block in the dwang, the movable setting of third extrusion piece is in the inside in second installation cavity, the inboard fixedly connected with constraint third extrusion piece in second installation cavity carries out the curb plate of motion.

Preferably, the movable block is movably arranged on the mounting disc through the sliding groove and the sliding rod, the side surface of the mounting disc is provided with a third mounting cavity corresponding to the position of the movable block, the inside of the third mounting cavity is fixedly provided with a first telescopic motor, the output end of the first telescopic motor is fixedly connected with a first telescopic rod, the first telescopic rod is far away from the side surface of the movable block, one side of the first telescopic rod is far away from the movable block, a fourth mounting cavity is arranged at the upper position, a pressing rod is movably arranged in the fourth mounting cavity, the side surface of the fourth mounting cavity is provided with constraint sliding grooves corresponding to the two sides of the pressing rod, the side surface of the pressing rod is fixedly connected with a sliding block corresponding to the constraint sliding grooves, the sliding block is movably arranged in the constraint sliding grooves, the side surface of the pressing rod is fixedly connected with a pressing spring, one end of the pressing spring is far away from the side surface of the fourth mounting cavity, one side of the movable block is far away from the first telescopic rod, the fifth mounting cavity is arranged at the lower position, the inside of the fifth mounting cavity is far away from one side of the first telescopic rod, the fourth mounting cavity is provided with a torsional spring and is provided with a fourth pressing block which swings, the side surface of the fourth mounting cavity is correspondingly provided with a fifth pressing block corresponding to the fourth groove, and the fourth side surface is fixedly connected with the fifth pressing block.

Preferably, the polishing structure comprises a second rotating motor fixedly connected to the bottom end of the mounting plate, the output end of the second rotating motor is fixedly connected with a second telescopic motor, the output end of the second telescopic motor is fixedly connected with a rotating plate, the outer side of the rotating plate is provided with a movable rotating ring, the lower end of the rotating ring is provided with fixed bristles, a second adapting groove is formed in the side face of the rotating ring, a second groove is formed in the outer side of the rotating ring, a threaded hole is formed in the side face of the rotating plate, corresponding to the position of the second adapting groove, of the threaded hole, a threaded column is connected with internal threads of the threaded hole, the threaded column penetrates through the second adapting groove, and the end face of the threaded column corresponds to the position fixedly connected with an extrusion head of the second groove.

A welding method for welding a corrugated pipe by using multistage welding equipment is characterized by comprising the following steps of: firstly, placing a first connection flange and a first-stage corrugated pipe on the inner side of a fixed ring, starting a first driving unit, clamping the connection ring placed on a workbench by the first driving unit through a clamping structure, and moving a second driving unit to the outer side of the connection ring through the first driving unit when starting a clamping device;

starting a first rotating motor, wherein the first rotating motor drives a second rotating shaft to rotate, the second rotating shaft drives a driving gear to rotate, the driving gear is meshed with a gear ring, the gear ring rotates, a connecting lug is driven by the gear ring to move, the connecting lug extrudes a contact block when moving, the contact block drives a rotating block to rotate when moving, the rotating block drives a third extrusion block to swing when rotating, and the third extrusion block clamps the outer side of a connecting ring;

the third step, moving the first driving unit, moving the connecting ring to the upper part of the first-stage corrugated pipe through the first driving unit and the clamping ring, then moving the clamping ring and the connecting ring downwards through the first driving unit, driving the second connecting flange to move downwards through the connecting ring, enabling the connecting ring to contact with the extending block firstly when moving downwards, enabling the moving column to move downwards through the extending block, enabling the moving column to extrude the fixing spring to extrude the movable ring to move downwards, extruding the second extruding block when the movable ring moves downwards, enabling the second extruding block to drive the first rotating column to rotate in the first rotating cavity, enabling the first extruding block to swing when rotating, and enabling the first connecting flange to move to the inner center position of the fixing ring through the first extruding block;

Continuously moving the connecting ring downwards, extruding the extending block by the connecting ring, driving the moving column to move downwards in the second movable cavity, extruding the clamping ball into the first installation cavity from the inside of the clamping cavity, driving the connecting ring to move downwards by the moving column while moving downwards, enabling the upper end of the primary corrugated pipe to be located below the welding groove, enabling the upper end of the primary corrugated pipe to penetrate through the welding groove and move to the position flush with the upper end of the welding groove in the process of moving the connecting ring downwards, and performing first welding operation;

The fifth step, the initial position of the second driving unit is opposite to the position of the workbench for placing the second corrugated pipe, the second driving unit drives the clamping ring to move upwards, the clamping ring drives the first fixing column to move upwards, the clamping ring belt drives the tensioning structure and the polishing structure to move upwards, the second driving unit is driven, the second driving unit drives the tensioning structure and the polishing structure to extend in from the inside of the second corrugated pipe, the first telescopic motor is started, the first telescopic motor drives the first telescopic rod to extend, the first telescopic rod drives the moving block to approach the inner side of the second corrugated pipe, the moving block drives the extruding rod and the fourth extruding block to move towards the inner sides of two welding pipes when approaching the inner side of the second corrugated pipe, the extruding rod moves in the fourth installation cavity after the inner side of the welding pipe is contacted with the extruding rod, the extruding rod is restrained by the extruding spring, the inner side of the welding pipe is synchronously extruded by the extruding spring, the inner side of the welding pipe is contacted with the fourth extruding block and then the fourth extruding block is arranged in the fifth extrusion cavity, and the fourth extruding block is connected with the fourth extruding block to enable the fourth extruding ring to move to swing the fourth extruding unit to move towards the inner side of the fourth installation cavity, and the fourth extruding unit is connected with the fourth extruding ring;

A second driving unit drives a clamping ring to move downwards at the moment, the clamping ring drives a tensioning structure and a polishing structure to move downwards, the polishing structure moves to the upper side of a connecting ring, a second telescopic motor is started, the second telescopic motor drives a rotating disc to move downwards, the rotating disc drives the rotating ring to move downwards, bristles are driven to contact with the upper end of the connecting ring, a second rotating motor is started, the second rotating motor drives the second telescopic motor to rotate, the second telescopic motor drives the rotating disc to rotate, the rotating disc drives the rotating ring to rotate, the rotating ring drives the bristles to rotate, welding slag is polished at the welding position of a welding groove and a first-stage corrugated pipe when the bristles rotate, the bristles are moved to an initial position through the second telescopic motor after polishing, when the bristles wear out, an extrusion head is rotated firstly, an extrusion head is extruded to rotate in the threaded hole, the extrusion head is moved downwards away from the position of the rotating ring, the bristles are driven to move downwards to a proper position by the rotating ring, the extrusion head is extruded to rotate in the threaded hole, and the extrusion head is locked in the rotating ring;

A seventh step of driving a clamping structure controlled by a first driving unit, starting a first rotating motor, enabling the first rotating motor to drive a second rotating shaft to rotate, enabling the second rotating shaft to drive a driving gear to rotate, enabling the driving gear to be meshed with a gear ring, enabling the gear ring to rotate, enabling a connecting lug to move, enabling the connecting lug to move away from a position of a contact block when moving, enabling the contact block to drive a rotating block to rotate when moving, enabling the rotating block to drive a third extrusion block to swing when rotating, enabling the third extrusion block to move away from the side face of a connecting ring, and loosening the connecting ring to move to the position of a welding pipe at the lower end of a secondary corrugated pipe through the first driving unit for clamping;

Eighth step, make the grip ring move downwards through the first drive unit, the grip ring pulls the welded pipe of second grade bellows lower extreme through the centre gripping of the third extrusion piece and moves downwards, the welded pipe of second grade bellows upper end is at the extrusion of extrusion pole again at this moment and moves the welded pipe of second grade bellows lower extreme to the lower extreme of second flange and weld, moves the bellows subassembly out from the top of first unable adjustment base through the synchronous motion of first drive unit and second drive unit after the welding.

Advantageous effects

The invention provides a multistage welding device and a multistage welding method for a corrugated pipe. The beneficial effects are as follows:

(1) The multistage welding equipment for the corrugated pipes is characterized in that the position of the first-stage corrugated pipe is determined and placed through the cooperation between the clamping structure and the calibration structure in the multistage welding process, the second-stage corrugated pipe is taken through the cooperation between the clamping structure and the tensioning structure, and the second-stage corrugated pipe is assembled and welded with the first-stage corrugated pipe at the determined position after the second-stage corrugated pipe is taken, so that the joint in the middle of the multistage corrugated pipe is welded efficiently.

(2) This multistage welding equipment of bellows makes driving gear and ring gear intermeshing rotate through first rotating electrical machines, makes the ring gear drive through the rotation direction of control driving gear and connects the lug and remove, controls the swing range of contact block through the extrusion of connection lug to the contact block to can press from both sides the bellows of getting different diameters and weld, improve the suitability of clamping structure in the reuse process.

(3) This multistage welding equipment of bellows makes the squeeze lever and fourth squeeze piece rise to tightly to the welded tube at second grade bellows both ends respectively through the removal of movable block, the squeeze lever is through the extrusion of extrusion spring for the inside of welded tube one can carry out the tight power that rises that changes, the fourth squeeze piece is through the power of torsional spring for the inside of welded tube one can carry out the tight power that rises that changes, when the clamping ring is pulling the welded tube of second grade bellows lower extreme through the centre gripping of third squeeze piece and is moving downwards, the welded tube of second grade bellows upper end moves downwards again at the extrusion of squeeze lever this moment, thereby make the bellows subassembly keep stable at the in-process of the butt joint of downward movement, stability under the improvement operating condition.

(4) The multistage welding equipment for the corrugated pipe polishes welding slag at the welding position of the welding groove and the first-stage corrugated pipe through the rotating brush hair, when the brush hair is worn, the rotating ring moves downwards on the rotating disc to enable the brush hair to extend downwards and then pass through the extrusion head to be locked, and the service life of the brush hair is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments can be derived from the drawings provided without the inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a side cross-sectional view of the connecting ring of the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;

FIG. 4 is a schematic view of a part of a first rotary column according to the present invention;

FIG. 5 is a schematic view of a partial structure of a movable ring according to the present invention;

FIG. 6 is a cross-sectional view of a clamp ring of the present invention;

FIG. 7 is an enlarged schematic view of the structure of FIG. 2B according to the present invention;

FIG. 8 is an enlarged schematic view of the structure of FIG. 6 according to the present invention;

FIG. 9 is a schematic view of a part of a rotary block according to the present invention

FIG. 10 is an enlarged schematic view of the structure of FIG. 2D according to the present invention;

FIG. 11 is an enlarged schematic view of the structure of FIG. 2E according to the present invention;

FIG. 12 is an enlarged schematic view of the structure of FIG. 2 at F in accordance with the present invention;

Fig. 13 is an enlarged view of the structure of fig. 2 at G according to the present invention.

Legend description:

1. A first fixed base; 211. a fixing ring; 212. a first movable chamber; 213. a movable ring; 215. a first rotation chamber; 216. a first guide chamber; 217. a second guide chamber; 218. a first rotating column; 219. a first extrusion block; 2110. a second extrusion block; 2111. a first connecting spring; 2112. a second rotation chamber; 2113. a second rotating column; 2114. a first connecting torsion spring; 221. a second movable chamber; 222. a fixed spring; 223. a moving column; 224. an extension block; 225. a first mounting cavity; 226. a clamping cavity; 227. a second connecting spring; 228. a clamping ball; 311. a first-stage bellows; 312. a first connection flange; 313. a connecting ring; 314. a welding groove; 315. a second connection flange; 316. a second-stage bellows; 317. welding the pipe; 318. a third connecting flange; 411. a second fixed base; 412. a first driving unit; 413. a second driving unit; 414. a drive column; 511. a mounting box; 512. a connecting plate; 513. a clamping ring; 514. a first fitting groove; 515. a drive gear; 516. a gear ring; 517. a connection bump; 518. a second mounting cavity; 519. a rotating block; 5110. a contact block; 5111. a third extrusion block; 5112. a side plate; 5113. a third movable chamber; 5114. a first rotation shaft; 5115. a second connecting torsion spring; 521. a third rotation chamber; 522. a first rotating electric machine; 523. a second rotation shaft; 611. a first fixing column; 612. a second fixing column; 613. a mounting plate; 614. a third mounting cavity; 615. a first telescopic motor; 616. a first telescopic rod; 617. a moving block; 618. a fourth mounting cavity; 619. restraining the sliding groove; 6110. a sliding block; 6111. an extrusion rod; 6112. extruding a spring; 6113. a fifth mounting cavity; 6114. a stop block; 6115. a fourth extrusion block; 6116. a first groove; 621. a second rotating electric machine; 622. a second telescopic motor; 623. a rotating disc; 624. a rotating ring; 625. a threaded hole; 626. a second fitting groove; 627. a threaded column; 628. an extrusion head; 629. brushing; 6210. and a second groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-13, a bellows multistage welding device comprises a first fixed base 1, a multifunctional driving assembly and a bellows assembly, wherein the multifunctional driving assembly is fixedly arranged on the side edge of the first fixed base 1, the bellows assembly is arranged above the first fixed base 1, a fixed calibration structure is arranged above the first fixed base 1, a movable clamping structure is arranged above the output end of the multifunctional driving assembly corresponding to the first fixed base 1, and a movable tensioning structure is arranged outside the upper side of the first fixed base 1 corresponding to the bellows assembly.

As shown in fig. 2-5, the calibration structure includes a fixed ring 211 fixedly connected to the upper side of the first fixed base 1, a first movable cavity 212 is provided at the upper end of the fixed ring 211, a movable ring 213 moving up and down is provided in the first movable cavity 212, a plurality of first extrusion blocks 219 swinging synchronously through extrusion of the movable ring 213 are provided in the inner side of the fixed ring 211, the first movable cavity 212 is a circular cavity, the movable ring 213 is a circular ring, first connection springs 2111 are fixedly connected to the bottom side of the movable ring 213 at equal intervals, one end of the first connection springs 2111 far away from the movable ring 213 is fixedly connected to the inner bottom side of the first movable cavity 212, a first rotation cavity 215 is provided at the inner side of the fixed ring 211 at equal intervals, a first guide cavity 216 is provided at one side of the first rotation cavity 215, a second guide cavity 217 is provided at the other side of the fixed ring 211, a first rotation column 218 is movably mounted in the inner side of the first rotation cavity 215, the first extrusion block 219 is fixedly connected to the first rotation column 218 at the position of the first rotation column 218 corresponding to the first guide cavity 216, and the first rotation column 218 is driven by the first rotation column 218 at the position of the first rotation column 2110 when the first rotation block 218 is driven by the first rotation column 218. Two second rotating cavities 2112 are formed on the side surface of the first rotating cavity 215 corresponding to the wall surface of the fixed ring 211, two second rotating columns 2113 which are movably connected to the positions of the two sides of the first rotating column 218 corresponding to the second rotating cavities 2112 are fixedly connected to the second rotating columns 2113 which are arranged inside the second rotating cavities 2112, one side of each second rotating column 2113, which is far away from the first rotating column 218, is fixedly connected with a first connecting torsion spring 2114, one end of each first connecting torsion spring 2114, which is far away from the first rotating column 218, is fixedly connected to the side surface of each second rotating cavity 2112, a second movable cavity 221 is formed on the upper end of each movable ring 213 at equal intervals in a circumference, a fixed spring 222 is fixedly connected to the inner bottom side of each second movable cavity 221, a movable column 223 is movably mounted in each second movable cavity 221, the lower end of each movable column 223 is fixedly connected to the upper end of each fixed spring 222, an extension block 224 is fixedly connected to the upper end of each movable column 223, each extension block 224 drives each movable column 223 to move, each fixed spring 222 is extruded by each movable spring 213, the inner side of each movable column 213 is fixedly connected to each movable ring 213, a second movable cavity 226 is fixedly connected to each second cavity 225 is formed by a first clamping cavity 225, and each second cavity 225 is fixedly connected to the inner end of each second cavity 225.

As shown in fig. 2 and 6-9, the clamping structure comprises a clamping ring 513 movably arranged at the output end of the multifunctional driving component, the clamping ring 513 is a hollow ring, a gear ring 516 for rotating is movably arranged in the clamping ring 513, a second installation cavity 518 is formed in the inner side of the clamping ring 513, a connecting bump 517 is fixedly arranged at the position, corresponding to the second installation cavity 518, of the inner side of the gear ring 516, a third extrusion block 5111 triggered by the connecting bump 517 is movably arranged in the second installation cavity 518, the clamping structure further comprises a mounting box 511, the mounting box 511 is fixedly connected to the side face of the driving column 414, the upper end of the mounting box 511 is fixedly connected with a connecting plate 512, the clamping ring 513 is fixedly connected to the side face of the mounting box 511 corresponding to the lower side of the connecting plate 512, a third rotation cavity 521 is formed in the position, corresponding to the mounting box 511, of the upper side of the connecting plate 512, a first rotation motor 522 is fixedly connected to the position, corresponding to the third rotation cavity 521, the output end of the first rotating motor 522 is fixedly connected with a second rotating shaft 523, the first rotating motor 522 drives the second rotating shaft 523 to rotate, the second rotating shaft 523 penetrates through the third rotating cavity 521 to extend into the mounting box 511, one end of the second rotating shaft 523 far away from the first rotating motor 522 is fixedly connected with a driving gear 515 corresponding to the inside of the mounting box 511, the second rotating shaft 523 drives the driving gear 515 to rotate, a first adapting groove 514 is formed in the side surface of the clamping ring 513 corresponding to the position of the driving gear 515, the driving gear 515 is meshed with the gear ring 516, the gear ring 516 rotates, a rotating block 519 is movably arranged in the second mounting cavity 518, the rotating block 519 drives a third extrusion block 5111 to swing when rotating, a third movable cavity 5113 is formed in the side surface of the second mounting cavity 518 corresponding to the two ends of the rotating block 519, the end face of the rotating block 519 is fixedly connected with a first rotating shaft 5114 corresponding to the position of the third movable cavity 5113, the first rotating shaft 5114 is movably mounted in the third movable cavity 5113, one end, away from the rotating block 519, of the first rotating shaft 5114 is fixedly connected with a second connecting torsion spring 5115, one end, away from the first rotating shaft 5114, of the second connecting torsion spring 5115 is fixedly connected with the inner side of the third movable cavity 5113, the side face of the rotating block 519 is fixedly connected with a contact block 5110 corresponding to the position of the connecting lug 517, the contact block 5110 drives the rotating block 519 to rotate when moving, the gear ring 516 drives the connecting lug 517 to move, the connecting lug 517 extrudes the contact block 5110 when moving, the third extrusion block 5111 is fixedly connected to one side, away from the contact block 5110, of the third extrusion block 5111 is movably arranged in the second installation cavity 518, and the inner side plate 5112 for restraining the movement of the third extrusion block 5111 is fixedly connected with the inner side plate 5112 of the second installation cavity 518.

As shown in fig. 2 and 10-13, the tensioning structure comprises a first fixed column 611, the first fixed column 611 is movably arranged in the clamping structure, the lower end of the first fixed column 611 is fixedly connected with a second fixed column 612, one end of the second fixed column 612, which is far away from the first fixed column 611, is fixedly connected with a mounting plate 613, the outer side of the mounting plate 613 is provided with at least three moving blocks 617 which transversely move, the bottom side of the mounting plate 613 is provided with a polishing structure, the polishing structure comprises a second rotating motor 621 fixedly connected with the bottom end of the mounting plate 613, the output end of the second rotating motor 621 is fixedly connected with a second telescopic motor 622, the second rotating motor 621 drives the second telescopic motor 622 to rotate, the output end of the second telescopic motor 622 is fixedly connected with a rotating plate 623, the second telescopic motor 622 drives the rotating plate 623 to rotate, the second telescopic motor 622 drives the rotating plate 623 to move, the outer side of the rotating disk 623 is provided with a movable rotating ring 624, the rotating disk 623 drives the rotating ring 624 to rotate, the rotating disk 623 drives the rotating ring 624 to move, the lower end of the rotating ring 624 is provided with fixed bristles 629, the rotating ring 624 drives the bristles 629 to move downwards, the rotating ring 624 drives the bristles 629 to rotate, the side surface of the rotating ring 624 is provided with a second adapting groove 626, the outer side of the rotating ring 624 is provided with a second groove 6210 corresponding to the position of the second adapting groove 626, the side surface of the rotating disk 623 is provided with a threaded hole 625 corresponding to the position of the second adapting groove 626, the internal thread of the threaded hole 625 is connected with a thread post 627, the thread post 627 penetrates through the second adapting groove 626 and is fixedly connected with a squeezing head 628 corresponding to the position of the second groove 6210, the squeezing head 628 is close to the rotating ring 624 to lock the rotating ring 624, the moving block 617 is movably arranged on the mounting disk 613 through a sliding groove and a sliding rod, the side of the mounting disc 613 is provided with a third mounting cavity 614 corresponding to the position of the moving block 617, the inside of the third mounting cavity 614 is fixedly provided with a first telescopic motor 615, the output end of the first telescopic motor 615 is fixedly connected with a first telescopic rod 616, the first telescopic motor 615 drives the first telescopic rod 616 to move, one end of the first telescopic rod 616, which is far away from the first telescopic motor 615, is fixedly connected with the side of the moving block 617, one side of the moving block 617, which is far away from the first telescopic rod 616, is provided with a fourth mounting cavity 618, the inside of the fourth mounting cavity 618 is movably provided with a squeezing rod 6111, the side of the fourth mounting cavity 618 is provided with constraint sliding grooves 619 corresponding to the two sides of the squeezing rod 6111, the side of the squeezing rod 6111 is fixedly connected with a sliding block 6110, the side of the sliding block 6111 is movably arranged in the constraint sliding groove 619, the side of the sliding block 6111 is fixedly connected with a squeezing spring 6112 at equal intervals, one end of the squeezing spring 6112, which is far away from the rod 6111, is fixedly connected with the side of the fourth telescopic rod 6111, one side of the fourth mounting cavity 618 is close to the inner side of the fourth mounting cavity 6113, which is provided with a fifth rolling spring 6113, which is arranged on the inner side of the fourth mounting cavity 6113, which is close to the fourth side of the fourth mounting cavity 6113, and the fifth rolling block 6113 is connected with the inner side of the fourth rolling block 6113, the fifth rolling block 6113 is arranged at the position of the side of the fourth rolling block 6113, and the inner side of the fifth rolling block 6113 is correspondingly to the fifth rolling cavity 6113, and the inner side of the rolling block 13 is provided with the rolling compression block 13 is provided with a rolling compression groove 13, and the rolling block 13 rolling compression groove 13 is pressed, after the inner side of the welded pipe 317 contacts with the fourth extrusion block 6115, the fourth extrusion block 6115 swings in the fifth installation cavity 6113, and the torsional spring is stressed after the swing of the fourth extrusion block 6115 so that the fourth extrusion block 6115 extrudes the side surface of the welded pipe 317.

As shown in fig. 1-2, the multifunctional driving assembly comprises a second fixed base 411, a movable first driving unit 412 is arranged on the upper side of the second fixed base 411, a movable second driving unit 413 is arranged above the first driving unit 412, and driving columns 414 are fixedly connected to the output ends of the first driving unit 412 and the second driving unit 413.

As shown in fig. 1, the bellows assembly includes a first-stage bellows 311, a first connection flange 312, a connection ring 313, a welding groove 314, a second connection flange 315, a second-stage bellows 316, a welding pipe 317 and a third connection flange 318, the first connection flange 312 is movably disposed in the fixing ring 211, the lower end of the first-stage bellows 311 is fixedly connected in the first connection flange 312, the welding groove 314 is fixedly connected at the upper end of the connection ring 313, the second connection flange 315 is fixedly connected at the outer side of the connection ring 313, the upper end of the first-stage bellows 311 is welded at a position corresponding to the welding groove 314 at the upper end of the connection ring 313, both ends of the second-stage bellows 316 are fixedly connected with welding pipes 317, the welding pipe 315 is welded at the outer side of the second connection flange, and a workbench for placing the first-stage bellows 311 and the second-stage bellows 316 is fixedly disposed on the side of the first driving unit 412.

A welding method using a bellows multistage welding apparatus, first, a first connection flange 312 and a first stage bellows 311 are placed inside a fixed ring 211, a first driving unit 412 is started, the first driving unit 412 clamps a connection ring 313 placed on a table through a clamping structure, and when a clamping device is started, a second driving unit 413 is moved to the outside of the connection ring 313 through the first driving unit 412;

A second step of starting a first rotating motor 522, wherein the first rotating motor 522 drives a second rotating shaft 523 to rotate, the second rotating shaft 523 drives a driving gear 515 to rotate, the driving gear 515 is meshed with a gear ring 516, the gear ring 516 rotates, the gear ring 516 drives a connecting lug 517 to move, the connecting lug 517 extrudes a contact block 5110 when moving, the contact block 5110 drives a rotating block 519 to rotate when moving, the rotating block 519 drives a third extrusion block 5111 to swing when rotating, and the third extrusion block 5111 clamps the outer side of a connecting ring 313;

Third, moving the first driving unit 412, moving the connection ring 313 to above the first-stage bellows 311 by the first driving unit 412 and the clamping ring 513, then moving the clamping ring 513 and the connection ring 313 downward by the first driving unit 412, wherein the connection ring 313 drives the second connection flange 315 to move downward, when the connection ring 313 moves downward, the connection ring 313 contacts with the extension block 224 first, the extension block 224 drives the moving column 223 to move downward, the moving column 223 presses the fixed spring 222 to press the movable ring 213 to move downward, when the movable ring 213 moves downward, the second pressing block 2110 presses the second pressing block 2110, the second pressing block 2110 drives the first rotating column 218 to rotate in the first rotating cavity 215, the first pressing block 219 drives the first pressing block 219 to swing when the first pressing block 219 swings, and the first connection flange 312 presses the first connection flange 312 to move the first connection flange 312 to the inner center of the fixed ring 211;

Fourthly, continuing to move the connecting ring 313 downwards, extruding the extending block 224 by the connecting ring 313, driving the moving column 223 to move downwards in the second movable cavity 221 by the extending block 224, extruding the clamping ball 228 into the first mounting cavity 225 from the clamping cavity 226, driving the connecting ring 313 to move downwards while the moving column 223 moves downwards, wherein the upper end of the primary corrugated pipe 311 is positioned below the welding groove 314, and in the process of moving the connecting ring 313 downwards, the upper end of the primary corrugated pipe 311 penetrates through the welding groove 314 and moves to a position flush with the upper end of the welding groove 314, and then performing a first welding operation;

The fifth step, the initial position of the second driving unit 413 is opposite to the position of the workbench where the second-stage corrugated pipe 316 is placed, so that the second driving unit 413 moves upwards, the second driving unit 413 drives the clamping ring 513 to move upwards, the clamping ring 513 drives the first fixing column 611 to move upwards, the clamping ring 513 carries the tensioning structure and the polishing structure to move upwards, the second driving unit 413 is driven, the second driving unit 413 carries the tensioning structure and the polishing structure to extend in from the inside of the second-stage corrugated pipe 316, meanwhile, the first telescopic motor 615 is started, the first telescopic motor 615 drives the first telescopic rod 616 to stretch out, the first telescopic rod 616 drives the moving block 617 to approach the inside of the second-stage corrugated pipe 316, the moving block 617 drives the pressing rod 6111 and the fourth pressing block 6115 to move towards the inside of the two welding pipes 317 when approaching the inside of the second-stage corrugated pipe 316, the pressing rod 6111 contacts the inside of the pressing rod 6111, the pressing rod 6111 moves in the inside of the fourth mounting cavity 618, the movement of the pressing rod 6111 is restrained by the pressing spring 6112, the pressing rod 6112 is pressed by the pressing rod 6111 to the inside of the fourth mounting cavity 61317, the pressing block 6115 is synchronously pressed by the pressing rod 6115, and the pressing block 6115 is pressed by the pressing the fourth side of the fourth mounting unit 313, and the pressing block 6115 is pressed towards the inside of the fourth welding pipe 317, and the pressing unit is pressed by the pressing block 6115 after the pressing rod 6115;

A sixth step, at this time, the second driving unit 413 drives the clamping ring 513 to move downwards, the clamping ring 513 drives the tensioning structure and the polishing structure to move downwards, so that the polishing structure moves to the upper side of the connecting ring 313, the second telescopic motor 622 is started, the second telescopic motor 622 drives the rotating disc 623 to move downwards, the rotating disc 623 drives the rotating ring 624 to move downwards, the rotating ring 624 drives the bristles 629 to contact with the upper end of the connecting ring 313, the second rotating motor 621 is started, the second rotating motor 621 drives the second telescopic motor 622 to rotate, the second telescopic motor 622 drives the rotating disc 623 to rotate, the rotating disc 623 drives the rotating ring 624 to rotate, the rotating ring 624 drives the bristles 629 to rotate, the welding groove 314 and the first-stage corrugated pipe 311 are polished at the welding position when the bristles 629 rotate, the bristles 629 are moved to the initial position through the second telescopic motor 622, when the bristles 629 are worn, the extruding head 628 firstly drives the threaded column 627 to rotate in the threaded hole 625, the extruding head 624 moves downwards to the rotating ring 624 away from the rotating ring 624, and then the extruding head 628 moves to the proper position of the rotating head 628, and the extruding head 628 is locked in the threaded hole 627;

Seventh, the clamping structure controlled by the first driving unit 412 is driven, the first rotating motor 522 is started, the first rotating motor 522 drives the second rotating shaft 523 to rotate, the second rotating shaft 523 drives the driving gear 515 to rotate, the driving gear 515 is meshed with the gear ring 516, the gear ring 516 rotates, the gear ring 516 drives the connecting protrusion 517 to move, the connecting protrusion 517 moves to a position far away from the contact block 5110 when moving, the contact block 5110 drives the rotating block 519 to rotate when moving, the rotating block 519 drives the third extrusion block 5111 to swing when rotating, the third extrusion block 5111 moves to a side far away from the connecting ring 313, and the connecting ring 313 is released to move to a position of the welding pipe 317 at the lower end of the secondary corrugated pipe 316 through the first driving unit 412 to clamp;

Eighth, the clamping ring 513 is moved downward by the first driving unit 412, the clamping ring 513 pulls the welded pipe 317 at the lower end of the secondary corrugated pipe 316 to move downward by the clamping of the third pressing block 5111, at this time, the welded pipe 317 at the upper end of the secondary corrugated pipe 316 is pressed by the pressing rod 6111 to move downward again, the welded pipe 317 at the lower end of the secondary corrugated pipe 316 is moved to the lower end of the second connecting flange 315 to perform welding, and after the welding is completed, the corrugated pipe assembly is moved out from above the first fixing base 1 by the synchronous movement of the first driving unit 412 and the second driving unit 413.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a multistage welding equipment of bellows, includes first unable adjustment base (1), multi-functional drive assembly and bellows subassembly, and multi-functional drive assembly is fixed to be set up in the side of first unable adjustment base (1), and the bellows subassembly sets up in the top of first unable adjustment base (1), its characterized in that: the utility model discloses a multifunctional driving assembly, which is characterized in that a fixed calibration structure is arranged above a first fixed base (1), the output end of the multifunctional driving assembly is provided with a movable clamping structure corresponding to the upper side of the first fixed base (1), the upper side of the first fixed base (1) is provided with a movable tensioning structure corresponding to the outer side of the bellows assembly, the calibration structure comprises a fixed ring (211) fixedly connected to the upper side of the first fixed base (1), the upper end of the fixed ring (211) is provided with a first movable cavity (212), the inside of the first movable cavity (212) is provided with a movable ring (213) which moves up and down, the inside of the fixed ring (211) is provided with a plurality of first extrusion blocks (219) which synchronously swing through the extrusion of the movable ring (213), the clamping structure comprises a clamping ring (513) which is movably arranged at the output end of the multifunctional driving assembly, the inside of the clamping ring (513) is provided with a rotary gear ring (516), the inside of the clamping ring (513) is provided with a second mounting cavity (518), the inside of the clamping ring (518) is fixedly provided with a position corresponding to the second mounting cavity (518), the inside of the second mounting cavity (518) is fixedly provided with a connecting projection (517), the second movable projection (611) is connected to the first extrusion block (611) and the first extrusion block (11) is arranged inside the first extrusion block (11) and the first extrusion block (5111) is arranged inside the movable column (11), the lower end of the first fixed column (611) is fixedly connected with a second fixed column (612), one end of the second fixed column (612) away from the first fixed column (611) is fixedly connected with a mounting plate (613), the outer side of the mounting plate (613) is provided with a moving block (617) which moves transversely, the bottom side of the mounting plate (613) is provided with a polishing structure, the multifunctional driving assembly comprises a second fixed base (411), the upper side of the second fixed base (411) is provided with a movable first driving unit (412), the upper side of the first driving unit (412) is provided with a movable second driving unit (413), the output ends of the first driving unit (412) and the second driving unit (413) are fixedly connected with driving columns (414), the corrugated pipe assembly comprises a first corrugated pipe (311), a first connecting flange (312), a connecting ring (313), a welding groove (314), a second connecting flange (315), a second corrugated pipe (316), a welding pipe (317) and a third connecting flange (318), the first connecting flange (312) is movably arranged in the fixing ring (211), the lower end of the first driving unit (412) and the output end of the second driving unit (413) is fixedly connected with the first connecting flange (313), the upper end of the first-stage corrugated pipe (311) is welded at the position, corresponding to the welding groove (314), of the upper end of the connecting ring (313), the two ends of the second-stage corrugated pipe (316) are fixedly connected with welding pipes (317), a third connecting flange (318) is fixedly connected to the position, corresponding to the welding pipes (317), of the outer side of the second-stage corrugated pipe (316), the welding pipes (317) are welded at the outer side of the second connecting flange (315), a workbench for placing the first-stage corrugated pipe (311) and the second-stage corrugated pipe (316) is fixedly arranged on the side surface of the first driving unit (412), the first movable cavity (212) is a circular cavity, a first connecting spring (2111) is fixedly connected to the equidistant circumference of the bottom side of the movable ring (213), one end, far away from the movable ring (213), of the first connecting spring (2111) is fixedly connected to the inner bottom side of the first movable cavity (212), a first rotary cavity (215) is formed in the equidistant circumference of the inner side of the fixed ring (211), a first guide cavity (215) is formed on the inner side of the first rotary cavity (215), a first guide cavity (216) is formed on the inner side of the fixed ring (211), a first guide cavity (215) is formed on the inner side of the first rotary cavity (215), a first rotary cylinder (218) is formed on the inner side of the first rotary cylinder (218), the first extrusion block (219) is fixedly connected to the side surface of the first rotation column (218) corresponding to the position of the first guide cavity (216), the second extrusion block (2110) is fixedly connected to the side surface of the first rotation column (218) corresponding to the position of the second guide cavity (217), the second extrusion block (2110) is an L-shaped block, the moving block (617) is movably arranged on the mounting plate (613) through a sliding groove and a sliding rod, the side surface of the mounting plate (613) corresponding to the moving block (617) is provided with a third mounting cavity (614), the inner part of the third mounting cavity (614) is fixedly provided with a first telescopic motor (615), the output end of the first telescopic motor (615) is fixedly connected with a first telescopic rod (616), one end of the first telescopic rod (616) far away from the first telescopic motor (615) is fixedly connected to the side surface of the moving block (617), one side of the moving block (617) far away from the first telescopic rod (616) is provided with a fourth mounting cavity (618) at an upper position, the inner part of the fourth mounting cavity (618) is movably provided with a extrusion cavity (11) corresponding to the moving block (617), the inner part of the fourth mounting cavity (618) is correspondingly provided with extrusion grooves (619) corresponding to the sliding grooves (6111) and constraint grooves (619) are formed on two sides of the sliding grooves (6111) of the sliding rod (61 (61) respectively, and the sliding grooves (6111) are correspondingly arranged on the sliding grooves (611) respectively, side equidistance fixedly connected with extrusion spring (6112) of extrusion pole (6111), the one end fixed connection that extrusion spring (6112) kept away from extrusion pole (6111) is in the side of fourth installation cavity (618), fifth installation cavity (6113) has been seted up to one side that movable block (617) kept away from first telescopic link (616) lower position, the inside of fifth installation cavity (6113) is provided with fourth extrusion piece (6115) that carries out the wobbling through torsional spring and pivot, fourth extrusion piece (6115) is the arc piece, first recess (6116) has been seted up to the side of fourth extrusion piece (6115) upper position, the position fixedly connected with dog (6114) that the upside of fifth installation cavity (6113) corresponds first recess (6116).

2. A bellows multi-stage welding apparatus according to claim 1, wherein: two second rotating cavities (2112) are formed in the side faces of the first rotating cavities (215) corresponding to the wall faces of the fixing rings (211), the positions, corresponding to the second rotating cavities (2112), of the two sides of the first rotating column (218) are fixedly connected with second rotating columns (2113) movably mounted in the second rotating cavities (2112), one side, away from the first rotating column (218), of each second rotating column (2113) is fixedly connected with a first connecting torsion spring (2114), and one end, away from the first rotating column (218), of each first connecting torsion spring (2114) is fixedly connected with the side face, corresponding to the second rotating cavities (2112), of each second rotating column (2112).

3. A bellows multi-stage welding apparatus according to claim 2, wherein: second movable cavity (221) have been seted up to the upper end equidistance circumference of expansion ring (213), the inside bottom side fixedly connected with fixed spring (222) of second movable cavity (221), the inside movable mounting of second movable cavity (221) has movable post (223), the lower extreme and the upper end fixed connection of fixed spring (222) of movable post (223), the upper end fixedly connected with extension piece (224) of movable post (223), joint chamber (226) have been seted up to the inboard of second movable cavity (221) corresponding to the position of movable post (223), first installation chamber (225) have been seted up to one side of movable post (223) corresponding to joint chamber (226), the inside fixedly connected with second connecting spring (227) of first installation chamber (225), the terminal surface fixedly connected with joint ball (228) of second connecting spring (227).

4. A bellows multi-stage welding apparatus according to claim 3, wherein: the clamping structure further comprises a mounting box (511), the mounting box (511) is fixedly connected to the side face of the driving column (414), the upper end of the mounting box (511) is fixedly connected with a connecting plate (512), the clamping ring (513) is fixedly connected to the side face of the mounting box (511) corresponding to the lower side of the connecting plate (512), a third rotating cavity (521) is formed in the position, corresponding to the third rotating cavity (521), of the upper side of the connecting plate (512), a first rotating motor (522) is fixedly connected to the position, corresponding to the third rotating cavity (521), of the upper side of the connecting plate (512), a second rotating shaft (523) is fixedly connected to the output end of the first rotating motor (522), the second rotating shaft (523) penetrates through the third rotating cavity (521) to extend into the mounting box (511), one end, corresponding to the mounting box (511), of the second rotating shaft (523) is fixedly connected with a driving gear (515), a first adapting groove (514) is formed in the position, corresponding to the side face of the clamping ring (513), of the driving gear (515), and the driving gear (516) is meshed with the gear ring gear (516).

5. A bellows multi-stage welding apparatus according to claim 4, wherein: the inside movable mounting of second installation cavity (518) has dwang (519), third movable cavity (5113) have all been seted up to the side of second installation cavity (518) corresponding to the both ends of dwang (519), the terminal surface of dwang (519) corresponds the position fixedly connected with first rotation axis (5114) of third movable cavity (5113), first rotation axis (5114) movable mounting is in the inside of third movable cavity (5113), the one end fixedly connected with second connection torsional spring (5115) of dwang (5114) is kept away from to first rotation axis (5114), the one end fixedly connected with of second connection torsional spring (5115) is in the inboard of third movable cavity (5113), the position fixedly connected with contact block (5110) of connecting lug (517) is kept away from to the side of dwang (519), third extrusion piece (5111) movable setting is in the inside of second installation cavity (518), the inside of second installation cavity (5111) is kept away from to the side plate (5111), the fixed connection of third extrusion piece (5111) is carried out the movement of restriction briquetting (5112).

6. A bellows multi-stage welding apparatus according to claim 5, wherein: the utility model provides a polishing structure includes second rotating electrical machines (621) of fixed connection in mounting disc (613) bottom, the output fixedly connected with second flexible motor (622) of second rotating electrical machines (621), the output fixedly connected with rolling disc (623) of second flexible motor (622), the outside of rolling disc (623) is provided with movable swivel ring (624), the lower extreme of swivel ring (624) is provided with fixed brush hair (629), second adaptation groove (626) have been seted up to the side of swivel ring (624), second recess (6210) have been seted up in the position of second adaptation groove (626) in the outside of swivel ring (624), screw hole (625) have been seted up in the position of second adaptation groove (626) corresponding to the side of rolling disc (623), the inside threaded connection of screw hole (627), screw column (627) run through second adaptation groove (626) and set up, the terminal surface of screw column (627) corresponds second recess (6210) position fixedly connected with extrusion head (628).

7. A welding method for welding by using the bellows multi-stage welding apparatus according to claim 6, characterized in that: firstly, placing a first connecting flange (312) and a first-stage corrugated pipe (311) on the inner side of a fixed ring (211), starting a first driving unit (412), clamping a connecting ring (313) placed on a workbench by the first driving unit (412) through a clamping structure, and moving a second driving unit (413) to the outer side of the connecting ring (313) through the first driving unit (412) when starting a clamping device;

Starting a first rotating motor (522), wherein the first rotating motor (522) drives a second rotating shaft (523) to rotate, the second rotating shaft (523) drives a driving gear (515) to rotate, the driving gear (515) is meshed with a gear ring (516), the gear ring (516) rotates, a connecting lug (517) is driven by the gear ring (516) to move, the connecting lug (517) extrudes a contact block (5110) when moving, the contact block (5110) drives a rotating block (519) to rotate when moving, the rotating block (519) drives a third extrusion block (5111) to swing when rotating, and the third extrusion block (5111) clamps the outer side of a connecting ring (313);

Third, moving the first driving unit (412), moving the connecting ring (313) to the upper part of the first-stage corrugated pipe (311) through the first driving unit (412) and the clamping ring (513), then moving the clamping ring (513) and the connecting ring (313) downwards through the first driving unit (412), driving the second connecting flange (315) to move downwards through the connecting ring (313), enabling the connecting ring (313) to contact with the extending block (224) firstly when moving downwards, driving the moving column (223) to move downwards through the extending block (224), enabling the moving column (223) to press the fixing spring (222) to press the movable ring (213) downwards, enabling the movable ring (213) to press the second pressing block (2110) when moving downwards, enabling the second pressing block (2110) to drive the first pressing block (219) to swing in the first rotating cavity (215), and enabling the first pressing block (219) to press the first connecting flange (312) to move inwards when swinging to press the first connecting flange (312) to fix the inner position;

Fourthly, continuously moving the connecting ring (313) downwards, extruding the extending block (224) by the connecting ring (313), driving the moving column (223) to move downwards in the second movable cavity (221), simultaneously extruding the clamping ball (228) into the first mounting cavity (225) from the clamping cavity (226), driving the connecting ring (313) to move downwards while the moving column (223) moves downwards, wherein the upper end of the primary corrugated pipe (311) is positioned below the welding groove (314), and in the process of moving the connecting ring (313) downwards, the upper end of the primary corrugated pipe (311) penetrates through the welding groove (314) and moves to a position flush with the upper end of the welding groove (314), and then performing a first welding operation;

Fifthly, the initial position of the second driving unit (413) is opposite to the position of the workbench for placing the second corrugated pipe (316), the second driving unit (413) drives the clamping ring (513) to move upwards, the clamping ring (513) drives the first fixed column (611) to move upwards, the clamping ring (513) drives the tensioning structure and the polishing structure to move upwards, the second driving unit (413) is driven, the second driving unit (413) drives the tensioning structure and the polishing structure to extend into the second corrugated pipe (316) from the inside of the second corrugated pipe (316), the first telescopic motor (615) is started, the first telescopic motor (615) drives the first telescopic rod (616) to extend, the first telescopic rod (616) drives the moving block (617) to approach the inner side of the second corrugated pipe (316), the moving block (617) drives the extrusion rod (6111) and the fourth extrusion block (6115) to move towards the inner sides of the two welding pipes (317) respectively when approaching the inner sides of the second corrugated pipe (316), the extrusion rod (317) and the extrusion rod (6111) are pressed by the extrusion rod (6111) after the extrusion rod (6111) is contacted with the extrusion rod (6112) through the extrusion rod (6111) to the extrusion rod (6112) after the extrusion rod (6111) is pressed by the extrusion rod (6112), synchronously, after the inner side of the welding pipe (317) is contacted with a fourth extrusion block (6115), the fourth extrusion block (6115) swings in a fifth installation cavity (6113), the torsional spring is stressed after the fourth extrusion block (6115) swings to enable the fourth extrusion block (6115) to extrude the side surface of the welding pipe (317), a second driving unit (413) is started, and the second driving unit (413) moves the tensioning structure and the polishing structure to the upper side of the connecting ring (313) through a clamping ring (513);

Sixth, the second driving unit (413) drives the clamping ring (513) to move downwards, the clamping ring (513) drives the tensioning structure and the polishing structure to move downwards, the polishing structure is enabled to move to the upper side of the connecting ring (313), the second telescopic motor (622) is started, the second telescopic motor (622) drives the rotating disc (623) to move downwards, the rotating disc (623) drives the rotating ring (624) to move downwards, the rotating ring (624) drives the bristles (629) to contact with the upper end of the connecting ring (313), the second rotary motor (621) is started, the second rotary motor (621) drives the second telescopic motor (622) to rotate, the second telescopic motor (622) drives the rotating disc (623) to rotate, the rotating ring (623) drives the bristles (629) to rotate, the welding groove (314) and the welding position of the first-stage corrugated pipe (311) are polished, the bristles (629) are moved to the initial position through the second telescopic motor (622) after polishing, the bristles (625) are extruded to the initial position when the bristles (628) are extruded to the screw threads (628) at first, the screw threads (628) are extruded at the position of the screw threads (628), the rotating ring (624) is moved downwards, the rotating ring (624) drives the brush hair (629) to move downwards to a proper position, then the extruding head (628) is continuously rotated, the extruding head (628) drives the threaded column (627) to rotate in the threaded hole (625), and the extruding head (628) is close to the rotating ring (624) to lock the rotating ring (624);

Seventh, a clamping structure controlled by a first driving unit (412) is driven, a first rotating motor (522) is started, the first rotating motor (522) drives a second rotating shaft (523) to rotate, the second rotating shaft (523) drives a driving gear (515) to rotate, the driving gear (515) is meshed with a gear ring (516), the gear ring (516) rotates, the gear ring (516) drives a connecting lug (517) to move, the connecting lug (517) moves to a position far away from a contact block (5110) when moving, the contact block (5110) drives a rotating block (519) to rotate when moving, the rotating block (519) drives a third extrusion block (5111) to swing when rotating, the third extrusion block (5111) moves to a side surface far away from a connecting ring (313), and the connecting ring (313) is released to move to a welding pipe (317) at the lower end of a second-stage corrugated pipe (316) through the first driving unit (412) to clamp;

Eighth, the clamping ring (513) is moved downwards by the first driving unit (412), the clamping ring (513) pulls the welding pipe (317) at the lower end of the secondary corrugated pipe (316) to move downwards by clamping of the third extrusion block (5111), at this time, the welding pipe (317) at the upper end of the secondary corrugated pipe (316) is extruded by the extrusion rod (6111) and then moves downwards, the welding pipe (317) at the lower end of the secondary corrugated pipe (316) is moved to the lower end of the second connecting flange (315) to weld, and after welding, the corrugated pipe assembly is moved out from the upper side of the first fixing base (1) by synchronous movement of the first driving unit (412) and the second driving unit (413).