An automatic walking laser surfacing welding equipment for the inner wall of a bent pipe

Abstract

The present invention belongs to the field of welding technology, and in particular to an automatic walking laser surfacing welding device for the inner wall of a bent pipe. The following scheme is proposed, including a welding station, a clamping mechanism is arranged on the top of the welding station, a fixing mechanism is arranged on one side of the top of the welding station, and a walking mechanism is arranged on one side of the fixing mechanism, the walking mechanism is composed of a guide rail and an electric slider, and the electric slider is slidably connected to the guide rail, the top and bottom of the electric slider are both connected to a welding gun by bolts, and a welding pipe is arranged on one side of the two welding guns, a constraint mechanism is arranged on one side of the top of the welding station, and the welding pipe is distributed in a C shape on the outer wall of the constraint mechanism. The present invention is convenient for improving the welding effect of the equipment on the inner wall of the bent pipe. When the welding gun moves inside the bent pipe, the welding pipe will be dragged, and heat will be generated during the welding process. Therefore, the dragged welding pipe will contact the inner wall of the bent pipe after welding, so that the welding pipe will be burned due to the heat.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to an automatic walking laser surfacing welding device for the inner wall of a bent pipe. Background Art

[0002] At present, when the cladding device in the elbow inner wall cladding machine on the market is cladding the inner wall of the elbow, the gun head elbow arm in the gun head assembly cannot pass through the curved portion of the elbow from one side of the elbow to the other side of the elbow. Therefore, when it is necessary to clad the inner wall of the entire elbow, it is usually necessary to divide the elbow into several sections, and then clad them separately, and then the cladding completed sections are grouped and welded to form the desired elbow. Therefore, the working efficiency of the elbow inner wall cladding device on the market is low, and the quality of the butt weld cannot be well guaranteed, which is prone to scrap.

[0003] After searching, a Chinese patent application with application publication number CN117943692A discloses an automatic walking laser surfacing welding additive device for the inner wall of a bent pipe, including a first fixing clamp and a second fixing clamp for fixing the bent pipe therein, a walking component moving along its bending direction is provided in the bent pipe, a welding gun head is provided on the walking component, a hollow shell is provided in the bent pipe, the walking component is arranged inside the hollow shell, the welding gun head is arranged at the end of the hollow shell, the welding gun head can rotate around the circumferential direction of the bent pipe on the hollow shell, and a stabilizer is provided between the walking component and the hollow shell. The present invention adopts a surfacing welding method in which the hollow shell automatically walks along the inner wall of the bent pipe, and when the position of the stabilizer to the hollow shell is centered relative to the bent pipe, the welding gun head rotates freely in the circumferential direction and moves along the axis of the bent pipe following the walking component, ensuring that the welding material is continuously and evenly welded to the inner wall of the bent pipe, thereby achieving the purpose of strengthening the inner wall or repairing wear, and improving the welding quality and consistency.

[0004] When welding the inner wall of a bent pipe, the existing equipment usually drives the welding gun to move inside the bent pipe through a walking mechanism, so as to complete the welding of the inner wall of the bent pipe through the welding gun. However, during the welding process, the welding gun and the welding machine are usually connected through a welding pipe. Therefore, when the welding gun moves inside the bent pipe, the welding pipe will be dragged, and heat will be generated during the welding process. Therefore, the dragged welding pipe will contact the inner wall of the bent pipe after welding, which will cause the welding pipe to burn due to the heat, and then damage the welding pipe, affecting the welding of the inner wall of the bent pipe. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic walking laser surfacing welding device for the inner wall of a bent pipe comprises a welding table, a clamping mechanism is arranged on the top of the welding table, a fixing mechanism is arranged on one side of the top of the welding table, and a walking mechanism is arranged on one side of the fixing mechanism, the walking mechanism is composed of a guide rail and an electric slider, and the electric slider is slidably connected to the guide rail, the top and bottom of the electric slider are both connected to welding guns by bolts, and welding pipes are arranged on one side of the two welding guns, a restraining mechanism is arranged on one side of the top of the welding table, and the welding pipes are distributed in a C shape on the outer wall of the restraining mechanism.

[0007] Preferably, the clamping mechanism includes a movable seat, a double-headed screw, two movable blocks and two clamping blocks, and the bottom of the movable seat is connected to the top of the welding platform by bolts, movable grooves are provided on both sides of the top of the movable seat, and both ends of the double-headed screw are rotatably connected to the two movable grooves by bearings, and the thread directions of the two ends of the double-headed screw are opposite, and threaded holes are provided on one side of the two movable blocks, and the threaded holes are threadedly connected to the double-headed screw, the bottom of the two clamping blocks is connected to the top of the two movable blocks by bolts, and one side of the movable seat is connected to a motor by bolts, and one end of the motor is welded to the double-headed screw.

[0008] Preferably, the fixing mechanism includes a fixing seat, a fixing frame and a fastening bolt, and the bottom of the fixing seat is connected to the top of the welding platform by bolts, a through hole is penetrated through one side of the fixing seat near the top, the bottom of the through hole is connected to a hydraulic rod by bolts, the top of the hydraulic rod is connected to a connecting block by bolts, one side of the connecting block is connected to the fixing frame by bolts, a threaded hole is penetrated through one side of the fixing frame, the threaded hole is threadedly connected to the fastening bolt, and one end of the fastening bolt contacts one side of the guide rail.

[0009] Preferably, positioning grooves are provided on the inner walls on both sides opposite to each other of the through opening, and the inner walls of the two positioning grooves are slidably connected with positioning blocks, and the two positioning blocks are connected to the connecting block by bolts.

[0010] Preferably, the constraint mechanism includes a constraint frame, a plurality of legs, two constraint rods, a rotating rod and a constraint roller, and the two sides of the bottom of the constraint frame are welded to the top of the legs, the bottom of the legs is connected to the top of the welding platform by bolts, the top and bottom of the constraint frame are provided with slots, the opposite sides of the slots are fixedly connected to the two constraint rods, the two ends of the rotating rod are rotatably connected to the opposite sides of the slots through bearings, the constraint roller is fixedly sleeved on the outer wall of the rotating rod, the outer wall of the constraint roller is provided with a plurality of anti-slip grooves, and the two constraint rods and the constraint roller are distributed in a herringbone shape.

[0011] Preferably, an air jet mechanism is provided at the bottom of the restraint mechanism, and the air jet mechanism cooperates with the restraint mechanism.

[0012] Preferably, the jet mechanism includes a turntable, a push rod, a push plate, an airbag, two conduits, a first nozzle and a second nozzle, and one side of the turntable is connected to the turn rod by bolts, a pin is welded on the outer wall of one side of the turntable near the top, and a shaft sleeve is rotatably sleeved on the outer wall of the pin, the two ends of the push rod are respectively connected to the top of the push plate and the bottom of the shaft sleeve by hinges, the airbag is located between the bottom of the push plate and the welding platform, the two conduits are symmetrically welded on both sides of the electric slider, a hose is arranged between the airbag and the conduit, the top of the first nozzle and the top of the second nozzle are both welded to the bottom of the electric slider, a first connecting pipe is arranged between the conduit and the first nozzle, and a second connecting pipe is arranged between the second nozzle and the conduit.

[0013] Preferably, a support mechanism is provided on one side of the top of the welding platform, and the support mechanism consists of two side plates, an axle rod and a support roller, and the bottom of the two side plates are connected to the top of the welding platform by bolts, and the two ends of the axle rod and the opposite side of the two side plates are rotatably connected by bearings, and the support roller is fixedly sleeved on the outer wall of the axle rod, and the support roller is made of smooth material.

[0014] The beneficial effects of the present invention are:

[0015] The present invention uses the travel mechanism and the restraint mechanism to place the components of the bent pipe inside the clamping mechanism when welding the inner wall of the bent pipe. After the placement is completed, the clamping mechanism is started, and the clamping mechanism clamps and fixes the components of the bent pipe. After the fixation is completed, the travel mechanism is inserted into the inside of the bent pipe and its position is adjusted. After the adjustment is completed, one end of the travel mechanism is fixed by the fixing mechanism. After the fixation is completed, the travel mechanism is started, and the travel mechanism drives the welding gun to move inside the bent pipe, and the inner wall of the bent pipe is welded by the welding gun. During this period, The welded pipe will move synchronously with the movement of the welding gun. At this time, the welded pipe can be constrained and tightened by the constraint mechanism. Since the two constraint rods and the constraint rollers are distributed in a herringbone shape, the welded pipe will be straightened when moving, so as to improve the welding effect of the equipment on the inner wall of the bent pipe and prevent the welded pipe from being dragged when the welding gun moves inside the bent pipe. Heat is generated during the welding process, so the dragged welded pipe will contact the inner wall of the welded bent pipe, which will cause the welded pipe to burn due to the heat, and then damage the welded pipe, affecting the welding of the inner wall of the bent pipe;

[0016] The present invention provides a constraint mechanism and an injection mechanism. When the welded pipe is straightened by the constraint mechanism, the constraint roller drives the rotating rod to rotate under the action of the tension of the welded pipe. At this time, the turntable rotates with the rotation of the rotating rod, and the pin shaft rotates with the center of the turntable as the center of the circle. At this time, the push rod drives the push plate to move up and down reciprocatingly under the action of the pin shaft and the shaft sleeve, and the movement of the push plate squeezes the airbag. At this time, the gas inside the airbag is transported to the inside of the catheter through the hose after being squeezed, and is transported to the inside of the first nozzle through the first connecting pipe. At this time, the airflow ejected from the inside of the first nozzle acts on the inner wall of the bent pipe, so as to process impurities adhered to the inner wall of the bent pipe. At the same time, part of the gas is transported to the inside of the second nozzle through the second connecting pipe, and the gas is ejected through the second nozzle, so as to facilitate the rapid cooling of the bent pipe after surfacing by the injected airflow, so as to improve the welding effect of the bent pipe and prevent the bent pipe from being deformed due to the high temperature generated during welding, thereby affecting the welding of the bent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an automatic walking laser surfacing welding device for the inner wall of a bent pipe proposed by the present invention;

[0018] Figure 2 This is a schematic diagram of the fixing mechanism structure of an automatic walking laser surfacing welding device for the inner wall of a bent pipe proposed by the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the walking mechanism and the restraining mechanism of the automatic walking laser surfacing welding equipment for the inner wall of a bent pipe proposed by the present invention;

[0020] Figure 4 This is a schematic diagram of the restraint mechanism structure of an automatic walking laser surfacing welding device for the inner wall of a bent pipe proposed by the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the jet mechanism of an automatic walking laser cladding welding device for the inner wall of a bent pipe proposed by the present invention;

[0022] Figure 6 A schematic diagram of the structure of the jet mechanism of the automatic walking laser cladding welding equipment for the inner wall of a bent pipe proposed by the present invention when viewed from above;

[0023] Figure 7 for Figure 6 Schematic diagram of the structure at point A proposed in .

[0024] In the attached figure: 1, welding table; 2, clamping mechanism; 3, restraining mechanism; 4, walking mechanism; 5, guide rail; 6, fixing mechanism; 7, fastening bolt; 8, fixing frame; 9, fixing seat; 10, hydraulic rod; 11, through port; 12, moving seat; 13, moving groove; 14, double-headed screw; 15, moving block; 16, clamping block; 17, motor; 18, electric slide; 19, supporting mechanism; 20, jet mechanism; 21, supporting Leg; 22, restraint frame; 23, rotating rod; 24, restraint rod; 25, restraint roller; 26, welding gun; 27, welding pipe; 28, side plate; 29, shaft; 30, support roller; 31, turntable; 32, pin shaft; 33, push rod; 34, push plate; 35, airbag; 36, hose; 37, catheter; 38, bushing; 39, first nozzle; 40, second nozzle; 41, first connecting pipe; 42, second connecting pipe. DETAILED DESCRIPTION

[0025] Example 1, reference Figure 1-Figure 4 , an automatic walking laser cladding device for the inner wall of a bent pipe comprises a welding station 1, a clamping mechanism 2 is arranged on the top of the welding station 1, a fixing mechanism 6 is arranged on one side of the top of the welding station 1, and a walking mechanism 4 is arranged on one side of the fixing mechanism 6, the walking mechanism 4 is composed of a guide rail 5 and an electric slider 18, and the electric slider 18 is slidably connected to the guide rail 5, the top and bottom of the electric slider 18 are both connected with welding guns 26 by bolts, and one side of the two welding guns 26 is provided with welding pipes 27, a constraint mechanism 3 is arranged on one side of the top of the welding station 1, and the welding pipes 27 are distributed in a C shape on the outer wall of the constraint mechanism 3 to prevent the welding gun 26 from being dragged when moving inside the bent pipe, and heat is generated during the welding process, so the dragged welding pipe 27 will contact the inner wall of the bent pipe after welding, so that the welding pipe 27 will be burned due to the heat, and then the welding pipe 27 will be damaged, which will affect the welding of the inner wall of the bent pipe.

[0026] On the basis of the above, the clamping mechanism 2 includes a movable seat 12, a double-headed screw 14, two movable blocks 15 and two clamping blocks 16, and the bottom of the movable seat 12 is connected to the top of the welding platform 1 by bolts, and movable grooves 13 are opened on both sides of the top of the movable seat 12. The two ends of the double-headed screw 14 are rotatably connected to the two movable grooves 13 through bearings. The thread directions of the two ends of the double-headed screw 14 are opposite. One side of the two movable blocks 15 is penetrated by a threaded hole, and the threaded hole is threadedly connected to the double-headed screw 14. The bottom of the two clamping blocks 16 is connected to the top of the two movable blocks 15 by bolts. One side of the movable seat 12 is connected to a motor 17 by bolts, and one end of the motor 17 is welded to the double-headed screw 14.

[0027] On the basis of the above, the fixing mechanism 6 includes a fixing seat 9, a fixing frame 8 and a fastening bolt 7, and the bottom of the fixing seat 9 is connected to the top of the welding platform 1 by bolts, a through hole 11 is penetrated through one side of the fixing seat 9 near the top, a hydraulic rod 10 is bolted to the bottom of the through hole 11, and a connecting block is bolted to the top of the hydraulic rod 10, one side of the connecting block is bolted to the fixing frame 8, a threaded hole is penetrated through one side of the fixing frame 8, the threaded hole is threadedly connected to the fastening bolt 7, and one end of the fastening bolt 7 is in contact with one side of the guide rail 5.

[0028] On the basis of the above, positioning grooves are provided on the inner walls on both sides of the opening 11 which are opposite to each other, and positioning blocks are slidably connected to the inner walls of the two positioning grooves, and the two positioning blocks are connected to the connecting block by bolts.

[0029] On the basis of the above, the constraint mechanism 3 includes a constraint frame 22, multiple legs 21, two constraint rods 24, a rotating rod 23 and a constraint roller 25, and the two sides of the bottom of the constraint frame 22 are welded to the top of the leg 21, and the bottom of the leg 21 is connected to the top of the welding platform 1 by bolts. The top and bottom of the constraint frame 22 are provided with slots, and the opposite sides of the slots are fixedly connected to the two constraint rods 24. The two ends of the rotating rod 23 are rotatably connected to the opposite sides of the slots through bearings. The constraint roller 25 is fixedly sleeved on the outer wall of the rotating rod 23, and the outer wall of the constraint roller 25 is provided with multiple anti-slip grooves. The two constraint rods 24 and the constraint roller 25 are distributed in a herringbone shape.

[0030] Example 2, reference Figure 1-Figure 7 , an automatic walking laser surfacing welding device for the inner wall of a bent pipe. Compared with Example 1, on the basis of Example 1, an air jet mechanism 20 is provided at the bottom of the constraint mechanism 3, and the air jet mechanism 20 and the constraint mechanism 3 are matched.

[0031] On the basis of the above, the jet mechanism 20 includes a turntable 31, a push rod 33, a push plate 34, an airbag 35, two guide tubes 37, a first nozzle 39 and a second nozzle 40, and one side of the turntable 31 is connected to the turntable 23 by bolts, a pin 32 is welded to the outer wall of one side of the turntable 31 near the top, and a sleeve 38 is rotatably sleeved on the outer wall of the pin 32, and the two ends of the push rod 33 are respectively connected to the top of the push plate 34 and the bottom of the sleeve 38 by hinges, the airbag 35 is located between the bottom of the push plate 34 and the welding platform 1, and the two guide tubes 37 are symmetrically welded. A hose 36 is connected to both sides of the electric slider 18, between the airbag 35 and the conduit 37, the top of the first nozzle 39 and the top of the second nozzle 40 are welded to the bottom of the electric slider 18, a first connecting pipe 41 is arranged between the conduit 37 and the first nozzle 39, and a second connecting pipe 42 is arranged between the second nozzle 40 and the conduit 37, so as to facilitate the rapid cooling of the elbow after surfacing by the injected airflow, so as to improve the welding effect of the elbow and prevent the elbow from being deformed due to the high temperature generated during welding, thereby affecting the welding of the elbow.

[0032] On the basis of the above, a support mechanism 19 is provided on one side of the top of the welding platform 1, and the support mechanism 19 is composed of two side plates 28, an axle rod 29 and a support roller 30, and the bottom of the two side plates 28 is connected to the top of the welding platform 1 by bolts, and the two ends of the axle rod 29 are rotatably connected to the opposite side of the two side plates 28 by bearings, and the support roller 30 is fixedly sleeved on the outer wall of the axle rod 29, and the support roller 30 is made of smooth material and is used to support the hose 36.

[0033] In summary, with the aid of the above technical solution of the present invention: when welding the inner wall of the bent pipe, the components of the bent pipe are placed inside the clamping mechanism 2. After the placement is completed, the clamping mechanism 2 is started, and the clamping mechanism 2 clamps and fixes the components of the bent pipe. After the fixing is completed, the walking mechanism 4 is inserted into the inside of the bent pipe and its position is adjusted. After the adjustment is completed, one end of the walking mechanism is fixed by the fixing mechanism 6. After the fixing is completed, the walking mechanism 4 is started, and the walking mechanism 4 drives the welding gun 26 to move inside the bent pipe, and the inner wall of the bent pipe is welded by the welding gun 26. During the welding process, the welding pipe 27 will move synchronously with the movement of the welding gun 26. At this time, the welding pipe 27 can be constrained and tightened by the constraint mechanism 3. Since the two constraint rods 24 and the constraint rollers 25 are arranged in a herringbone shape, the welding pipe 27 will be straightened when moving, so as to improve the welding effect of the equipment on the inner wall of the bent pipe and prevent the welding pipe 27 from being dragged when the welding gun 26 moves inside the bent pipe. Heat is generated during the welding process, so the dragged welding pipe 27 will contact the inner wall of the bent pipe after welding, so that the welding pipe 27 will be burned due to the heat, and then The welding pipe 27 is damaged, which affects the welding of the inner wall of the bent pipe. When the welding pipe is straightened by the constraint mechanism 3, the constraint roller 25 will drive the rotating rod 23 to rotate under the action of the tension of the welding pipe 27. At this time, the rotating disk 31 will rotate with the rotation of the rotating rod 23, and the pin 32 will rotate with the center of the rotating disk 31 as the center. At this time, the push rod 33 will drive the push plate 34 to move up and down under the action of the pin 32 and the sleeve 38, and the movement of the push plate 34 will squeeze the airbag 35. At this time, the gas inside the airbag 35 will be transported through the hose 36 after being squeezed. To the inside of the conduit 37, and is transported to the inside of the first nozzle 39 through the first connecting pipe 41. At this time, the airflow ejected from the first nozzle 39 will act on the inner wall of the elbow, so as to facilitate the treatment of impurities adhering to the inner wall of the elbow. At the same time, part of the gas will be transported to the inside of the second nozzle 40 through the second connecting pipe 42, and the gas will be ejected through the second nozzle 40, so as to facilitate the rapid cooling of the elbow after surfacing by the ejected airflow, so as to improve the welding effect of the elbow and prevent the elbow from being deformed due to the high temperature generated during welding, thereby affecting the welding of the elbow.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic walking laser surfacing welding device for the inner wall of a bent pipe, comprising a welding station (1), characterized in that: A clamping mechanism (2) is provided on the top of the welding platform (1), a fixing mechanism (6) is provided on one side of the top of the welding platform (1), and a walking mechanism (4) is provided on one side of the fixing mechanism (6), the walking mechanism (4) is composed of a guide rail (5) and an electric slider (18), and the electric slider (18) is slidably connected to the guide rail (5), the top and bottom of the electric slider (18) are both connected to welding guns (26) by bolts, and welding pipes (27) are provided on one side of the two welding guns (26), a restraining mechanism (3) is provided on one side of the top of the welding platform (1), and the welding pipes (27) are distributed in a C shape on the outer wall of the restraining mechanism (3), the restraining mechanism (3) comprises a restraining frame (22), a plurality of legs (21), four restraining rods (24), two rotating rods (23) and two restraining rollers (25), and the two sides of the bottom of the restraining frame (22) are welded to the tops of the legs (21), The bottom of the support leg (21) is connected to the top of the welding platform (1) by bolts. The top and bottom of the constraint frame (22) are both provided with notches. The two opposite sides of the notch are fixedly connected to the two constraint rods (24). The two ends of the rotating rod (23) are rotatably connected to the two opposite sides of the notch by bearings. The constraint roller (25) is fixedly sleeved on the outer wall of the rotating rod (23). The outer wall of the constraint roller (25) is provided with a plurality of anti-slip grooves. The two constraint rods (24) and the constraint roller (25) at the top notch and the bottom notch of the constraint frame (22) are arranged in a herringbone shape. The constraint roller in the top notch of the constraint frame (22) is above the two constraint rods. The welding pipe is wound on the constraint roller and below the two constraint rods. The welding pipe moves synchronously with the movement of the welding gun. The welding pipe can be constrained and tightened by the constraint mechanism. Since the two constraint rods and the constraint roller are arranged in a herringbone shape, the welding pipe is straightened when moving.

2. The automatic walking laser surfacing welding equipment for the inner wall of a curved pipe according to claim 1 is characterized in that: The clamping mechanism (2) comprises a movable seat (12), a double-headed screw (14), two movable blocks (15) and two clamping blocks (16), wherein the bottom of the movable seat (12) is connected to the top of the welding platform (1) by bolts, movable grooves (13) are provided on both sides of the top of the movable seat (12), the two ends of the double-headed screw (14) are rotationally connected to the two movable grooves (13) by bearings, the threads of the two ends of the double-headed screw (14) are in opposite directions, one side of the two movable blocks (15) is penetrated by threaded holes, the threaded holes are threadedly connected to the double-headed screw (14), the bottoms of the two clamping blocks (16) are connected to the tops of the two movable blocks (15) by bolts, one side of the movable seat (12) is connected to a motor (17) by bolts, and one end of the motor (17) is welded to the double-headed screw (14).

3. The automatic walking laser surfacing welding equipment for the inner wall of a curved pipe according to claim 1 is characterized in that: The fixing mechanism (6) comprises a fixing seat (9), a fixing frame (8) and a fastening bolt (7), wherein the bottom of the fixing seat (9) is connected to the top of the welding platform (1) by bolts, a through hole (11) is provided through one side of the fixing seat (9) near the top, a hydraulic rod (10) is connected to the bottom of the through hole (11) by bolts, a connecting block is connected to the fixing frame (8) by bolts at the top of the hydraulic rod (10), one side of the connecting block is connected to the fixing frame (8) by bolts, a threaded hole is provided through one side of the fixing frame (8), the threaded hole is threadedly connected to the fastening bolt (7), and one end of the fastening bolt (7) contacts one side of the guide rail (5).

4. The automatic walking laser surfacing welding equipment for the inner wall of a curved pipe according to claim 3 is characterized in that: The inner walls on both sides of the through opening (11) opposite to each other are provided with positioning grooves, and the inner walls of the two positioning grooves are slidably connected with positioning blocks, and the two positioning blocks are connected to the connecting block by bolts.

5. The automatic walking laser surfacing welding equipment for inner wall of curved pipe according to claim 1 is characterized in that: An air jet mechanism (20) is provided at the bottom of the constraint mechanism (3), and the air jet mechanism (20) and the constraint mechanism (3) are matched with each other.

6. The automatic walking laser surfacing welding equipment for the inner wall of a curved pipe according to claim 5 is characterized in that: The jet mechanism (20) comprises a rotating disk (31), a push rod (33), a push plate (34), an air bag (35), two guide tubes (37), a first nozzle (39) and a second nozzle (40), and one side of the rotating disk (31) is connected to the rotating rod (23) by bolts, a pin (32) is welded to the outer wall of one side of the rotating disk (31) near the top, a shaft sleeve (38) is rotatably sleeved on the outer wall of the pin (32), and two ends of the push rod (33) are respectively connected to the top of the push plate (34) and the bottom of the shaft sleeve (38) by hinges. The electric slider (18) is connected by a chain, the airbag (35) is located between the bottom of the push plate (34) and the welding platform (1), the two guide tubes (37) are symmetrically welded on both sides of the electric slider (18), a hose (36) is arranged between the airbag (35) and the guide tube (37), the top of the first nozzle (39) and the top of the second nozzle (40) are both welded to the bottom of the electric slider (18), a first connecting tube (41) is arranged between the guide tube (37) and the first nozzle (39), and a second connecting tube (42) is arranged between the second nozzle (40) and the guide tube (37).

7. The automatic walking laser surfacing welding equipment for the inner wall of a curved pipe according to claim 6 is characterized in that: A support mechanism (19) is provided on one side of the top of the welding platform (1), and the support mechanism (19) is composed of two side plates (28), an axle rod (29) and a support roller (30), and the bottoms of the two side plates (28) are connected to the top of the welding platform (1) by bolts, and the two ends of the axle rod (29) are rotatably connected to the opposite sides of the two side plates (28) by bearings, and the support roller (30) is fixedly sleeved on the outer wall of the axle rod (29), and the support roller (30) is made of a smooth material.

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