Water conservancy construction pipeline welding equipment and method

Abstract

The invention discloses water conservancy construction pipeline welding equipment and method, and relates to the technical field of pipeline welding, the water conservancy construction pipeline welding equipment comprises a rack, two transverse grooves are formed in the top of the rack, and two pipeline supporting mechanisms and a welding mechanism are arranged above the rack; and the quality improving assembly comprises two protection pieces arranged at the top of the rack, two sealing pieces arranged at the bottom of the rack and a cooling piece, and the protection pieces comprise sliding frames sliding on the inner sides of the two transverse grooves correspondingly. According to the welding device, the wrapping assisting piece is arranged to help the wrapping piece wrap the peripheries of to-be-welded areas on pipelines with different diameter sizes, so that a closed welding environment is formed around a welding part, external airflow is completely blocked, it is ensured that protective gas is not dissipated, the problems of air holes and oxidation generated during welding due to the influence of wind are solved, and the welding quality is improved. And the movable welding process of a welding head cannot be affected, a certain post-welding heat preservation effect is achieved at the low temperature, and the risk that cold cracks are generated in a welding seam and a heat affected zone is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, and specifically to a welding equipment and method for pipelines used in water conservancy construction. Background Technology

[0002] Water conservancy construction refers to the comprehensive construction operations of building, renovating and maintaining various water conservancy projects. Its fundamental purpose is to control and regulate water in nature in order to eliminate water hazards and utilize water resources. Pipelines used in water conservancy construction are pipeline systems used in water conservancy projects to transport water (such as irrigation, water supply and drainage) or withstand water pressure (such as pressure steel pipes of hydropower stations). They can be regarded as the "blood vessels" of water conservancy projects. For mainstream steel pipes, welding is the only reliable and economical permanent connection method. The reasons are to ensure structural strength and sealing, adapt to complex stress, and realize large-scale industrialized construction.

[0003] A patent with publication number CN120382293A discloses a welding device for hydraulic construction pipelines, relating to the field of welding technology. The device includes a support assembly, a drying assembly, and two pipeline bodies. The drying assembly has a welding component mounted on its outer surface, and includes two arc-shaped positioning plates. This welding device for hydraulic construction pipelines utilizes a desiccant filler placed inside a mesh. When the mesh is in close contact with the pipeline body, the desiccant filler absorbs moisture from the joints of the pipeline bodies. The desiccant filler is silica gel. When the silica gel desiccant comes into contact with moisture on the surface of the pipeline body, the moisture molecules move to the surface of the silica gel and do not chemically react with the pipeline body material or the welding materials used in the welding process. This avoids adverse effects on the pipeline and welding quality, solving the problem that welding on a damp surface of existing hydraulic construction pipelines affects welding quality.

[0004] When hydraulic pipeline welding equipment is used in harsh outdoor environments, the welding effect is directly affected by the environment of the application scenario. The biggest and most common enemy is wind, because even a slight breeze can blow away the protective zone of gas shielded welding, which can directly lead to defects such as porosity and oxidation in the weld. Summary of the Invention

[0005] The purpose of this invention is to provide a welding equipment and method for pipelines in water conservancy construction, which solves the problem that the welding effect of traditional welding equipment is easily affected by the environment of the usage scenario when used outdoors. Among them, the most vulnerable factor is wind. Even a light breeze can blow away the protective zone of gas shielded welding, which can directly lead to defects such as porosity and oxidation in the weld.

[0006] This invention solves the above-mentioned technical problems through the following technical solution: An equipment for welding pipelines in water conservancy construction, comprising: The frame has two horizontal slots at its top, and two pipe support mechanisms and a welding mechanism are provided above the frame. The quality enhancement component includes two protective components disposed at the top of the frame, two sealing components disposed at the bottom of the frame, and a cooling component. The protective components include sliding frames that slide on the inner sides of two transverse grooves, a wrapping component, and two wrapping aids. Each of the two sliding frames is fixed with a first slide rail. The wrapping component is disposed between the two sliding frames and is used to wrap around the welding area of ​​the pipe. The two wrapping aids are disposed on the two sliding frames and are used to wrap the wrapping component around pipes of different sizes. The two sealing components close the two wrapping components and help seal the contact position between the wrapping component and the pipe.

[0007] Preferably, the package includes two gravity sliders, which slide on two first slide rails respectively. A flexible inner insert and a flexible inner connecting strip are fixed on the two gravity sliders respectively. One end of the flexible inner insert and the flexible inner connecting strip are fixedly connected. A flexible hollow layer is fixed between one side of the flexible inner insert and the flexible inner connecting strip. An airbag layer is provided on the inner side of the flexible hollow layer.

[0008] Preferably, the wrapping aid includes a support bar fixed to one side of the sliding frame, two through rods passing through the support bar, an inner hollow bar fixed between one end of the two through rods, a variable pushing member provided on the inner side of the inner hollow bar, a cylinder fixed on the support bar, and one end of the cylinder telescopic rod passing through the support bar and fixed on the inner hollow bar.

[0009] Preferably, the variable pushing component includes a lead screw that rotates inside the hollow bar and a central hole pushing arm that slides inside the hollow bar. One end of the lead screw extends to the top of the hollow bar and is fixed with a knob. A limit plate is threadedly connected to the outer surface of the lead screw. The lead screw passes through the central hole on the central hole pushing arm, and the inner diameter of the central hole is larger than the diameter of the lead screw.

[0010] Preferably, the inner sides of the flexible inner insert and the flexible inner connecting strip are both provided with grooves, and the two grooves are connected. The sealing element includes a hollow sealing strip disposed on the inner side of the groove, a connecting plate fixed between the bottoms of the two sliding frames, and a hydraulic cylinder and two air cylinders fixed to the bottom of the frame. The inner sides of the two air cylinders are provided with piston plates, and a connecting frame is fixed between the two piston plates. The connecting frame and the connecting plate are fixedly connected. One end of each air cylinder is connected to the hollow sealing strip and the airbag layer through a three-port connecting pipe.

[0011] Preferably, the sealing element further includes two second slide rails fixed to the bottom of the frame, the connecting frame is slidably connected by two connecting blocks and two second slide rails, and one end of the cylinder telescopic rod is fixedly connected to the connecting plate.

[0012] Preferably, a groove is formed on one side of both the flexible inner insert and the flexible inner connector, and the two grooves are connected. The cooling component includes a refrigeration box fixed to the top of the frame and water-conducting heat exchange pipes embedded in the inner side of the two grooves. A semiconductor refrigeration chip is installed on the inner side of the refrigeration box, and a water pump is fixed to the top of the refrigeration box. The outlet of the water pump is connected to two flexible hoses through a three-way pipe. One end of each of the two flexible hoses is connected to the two water-conducting heat exchange pipes, and one end of each of the two water-conducting heat exchange pipes is connected to the refrigeration box through a pipe.

[0013] Preferably, the top of the frame is provided with a mounting groove, and an adjustment mechanism is installed on the inner side of the mounting groove. The adjustment mechanism is used to adjust the support spacing between the two pipe support mechanisms.

[0014] A method for welding equipment for pipelines in water conservancy construction includes the following steps: Step 1: Clamp and fix the pipe to the welding joint of the welding mechanism using the pipe support mechanism; Step 2: The coating component in the quality enhancement component wraps the welding area of ​​different types of pipes, forming a welding protection space. The cooling component absorbs the heat from the welding arc radiation, the conduction of the molten pool, and the heat released by the high-temperature weld, reducing the air temperature in the welder's operating area, improving the working environment, and maintaining equipment stability.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By using a wrapping aid, the packaged parts are wrapped around the area to be welded on pipes of different diameters, thus creating a closed welding environment around the welding area. This completely blocks external airflow, ensuring that the protective gas does not escape, solving the problems of porosity and oxidation caused by wind during welding, and does not affect the movement of the welding head during the welding process. It also has a certain post-weld heat preservation effect at low temperatures, significantly reducing the risk of cold cracking in the weld and heat-affected zone. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the frame, pipe support mechanism, welding mechanism, and adjustment mechanism in this invention.

[0018] Figure 3 This is a schematic diagram showing the disassembled welding mechanism in this invention.

[0019] Figure 4 This is a cross-sectional view of the support member in the pipeline support mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the mass-adding component in this invention.

[0021] Figure 6 This is a partial cross-sectional view of the protective component in this invention.

[0022] Figure 7 This is a schematic diagram showing the disassembly of the wrapping aid in this invention.

[0023] Figure 8 for Figure 5 A bottom view.

[0024] Figure 9 This is a partial cross-sectional view of the mass-adding component in this invention.

[0025] Figure 10 for Figure 9 Enlarged schematic diagram of part A in the middle.

[0026] 1. Frame; 2. Cross groove; 3. Pipe support mechanism; 4. Welding mechanism; 5. Mass-adding component; 51. Sliding frame; 52. First slide rail; 53. Gravity slider; 54. Flexible inner insert strip; 55. Flexible inner connecting strip; 56. Flexible hollow layer; 57. Encasing airbag layer; 58. Support bar; 59. Through rod; 510. Hollow bar rod; 511. Cylinder; 512. Lead screw; 513. Central hole pusher 514. Arm; 515. Limiting plate; 516. Groove; 517. Hollow sealing strip; 518. Connecting plate; 519. Oil cylinder; 520. Air cylinder; 521. Piston plate; 522. Connecting frame; 523. Second slide rail; 524. Tank; 525. Cooling box; 526. Water heat exchange pipe; 527. Semiconductor cooling chip; 528. Water pump; 529. Hose; 6. Mounting groove; 7. Adjustment mechanism. Detailed Implementation

[0027] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0028] This invention provides a technical solution: a welding device for pipelines in water conservancy construction, such as... Figures 1-4As shown, the assembly includes a frame 1 and a mass-adding component 5. The top of the frame 1 has two horizontal slots 2. Above the frame 1, there are two pipe support mechanisms 3 and a welding mechanism 4. The welding mechanism 4 is located in the center of the top of the frame 1, between the two pipe support mechanisms 3. The two pipe support mechanisms 3 are symmetrically arranged. The top of the frame 1 has an installation slot 6, which is located between the two horizontal slots 2. An adjustment mechanism 7 is installed inside the installation slot 6. The adjustment mechanism 7 consists of a bidirectional threaded rod rotating inside the installation slot 6, a variable frequency motor fixed to one side of the frame 1, two sliding seats threadedly connected to the bidirectional threaded rod, and mounting brackets fixed to the two sliding seats respectively. The adjustment mechanism 7 is used to adjust the support spacing between the two pipe support mechanisms 3. Guide rails are fixed on the top and back of the frame 1. The sliding seats slide on the guide rails on the top of the frame 1, and the mounting brackets slide on the guide rails on the back of the frame 1.

[0029] The pipe support mechanism 3 is mainly composed of three support components. Each support component includes a mounting housing, a bidirectional screw rotating inside the mounting housing, a guide rail fixed inside the mounting housing, two sliding seats sliding on the guide rail, a servo motor fixed outside the mounting housing, and support wheels fixed on the sliding seats. Both sliding seats are threaded onto the bidirectional screw. One end of the servo motor output shaft is fixed to one end of the bidirectional screw. One support component is fixed to the frame 1 near the welding mechanism 4, and its mounting housing is fixed to the top of the frame 1. The other two support components are arranged symmetrically vertically. One support component's mounting shell is fixed to the sliding seat, while the other support component's mounting shell is located at the bottom of the mounting frame. Two straight rods are fixed to the top of the mounting shell, with one end of each rod extending to the top of the mounting frame. An electric push rod is fixed to the top of the mounting frame, with one end of its telescopic rod extending to the bottom of the mounting frame and fixed to the mounting shell of the corresponding support component. The extension and retraction of the electric push rod is used to change the height of the support component connected to it. A servo motor drives a bidirectional screw to rotate, causing the two moving seats to move relative to each other, thereby changing the distance between the two support wheels, which is used to support various types of pipes.

[0030] The welding mechanism 4 includes a ring fixed to the top of the frame 1 and a variable speed motor fixed to the top of the frame 1. The inner side of the ring has a rotating groove and a through groove. A rotating ring rotates inside the rotating groove. A hydraulic cylinder is fixed inside the rotating ring by a fixing frame. A welding head is fixed to one end of the telescopic rod of the hydraulic cylinder. A toothed ring is fixed to the outer surface of the rotating ring. A gear is fixed on the output shaft of the variable speed motor. The gear passes through the through groove and meshes with the toothed ring. After one end of the two pipes is placed inside the ring, the variable speed motor drives the rotating ring to rotate through the gear and the toothed ring, thereby driving the welding head to rotate around the outer surface of the pipe to perform full welding work. The telescopic rod of the hydraulic cylinder extends and retracts, driving the welding head to move. When the welding head is moved closer to the center of the ring, it is suitable for pipes with smaller diameters. When it moves away from the center of the ring, it is suitable for pipes with larger diameters.

[0031] like Figures 5-6 As shown, the quality enhancement component 5 includes two protective components disposed on the top of the frame 1, two sealing components disposed on the bottom of the frame 1, and a cooling component. The protective components include sliding frames 51 that slide on the inner sides of the two transverse grooves 2 respectively, a wrapping component, and two auxiliary wrapping components. A first slide rail 52 is fixed on each of the two sliding frames 51. The wrapping component is disposed between the two sliding frames 51. The wrapping component is used to wrap around the welding area of ​​one end of the two pipes. The two auxiliary wrapping components are disposed on the two sliding frames 51 respectively. The auxiliary wrapping components are used to wrap the wrapping component around pipes of different sizes. The two sealing components close the two wrapping components and help seal the contact position between the wrapping component and the pipe, ensuring that the welding area is not affected by the surrounding airflow.

[0032] like Figures 5-10 As shown, the package includes two gravity sliders 53, which slide on two first slide rails 52 respectively. Flexible inner inserts 54 and flexible inner connectors 55 are fixed on the two gravity sliders 53 respectively. One end of the flexible inner inserts 54 and the flexible inner connectors 55 are fixedly connected. Except for the fixed connection end, the other parts of the flexible inner inserts 54 and the flexible inner connectors 55 are misaligned. When wrapped around the pipe, the flexible inner inserts 54 will be inserted into the inner side of the flexible inner connectors 55 so that the wrapping airbag layer 57 around the pipe can be closed. A flexible hollow layer 56 is fixed between one side of the flexible inner inserts 54 and the flexible inner connectors 55. The wrapping airbag layer 57 is provided on the inner side of the flexible hollow layer 56. In order to enable the wrapping airbag layer 57 to withstand the high temperature radiation, spatter and occasional slag burning during welding, special materials such as silicone coated fiberglass cloth and high temperature resistant rubber are required.

[0033] like Figures 5-10As shown, the auxiliary component includes a support bar 58 fixed to the sliding frame 51 away from the welding mechanism 4. Two through rods 59 are threaded through the support bar 58. An inner hollow bar 510 is fixed between one end of the two through rods 59. A variable pushing component is provided on the inner side of the inner hollow bar 510. The variable pushing component includes a lead screw 512 that rotates inside the inner hollow bar 510 and a central hole pushing arm 513 that slides inside the inner hollow bar 510. One end of the central hole pushing arm 513 is provided with a central hole, the inner diameter of which is larger than the diameter of the lead screw 512. One end of the lead screw 512 extends into the inner hollow bar 510. A knob is fixed to the top of the inner hollow bar 510. The outer surface of the lead screw 512 is threadedly connected to a limit plate 514. The limit plate 514 slides on the inner side wall of the inner hollow bar 510. An arrow is provided on the knob to indicate whether the rotation direction will cause the limit plate 514 to move up or down. The lead screw 512 passes through the central hole of the central hole push arm 513. Because the diameter of the lead screw 512 is smaller than that of the central hole, the rotation of the lead screw will not cause the central hole push arm 513 to move. A cylinder 511 is fixed on the support bar 58. One end of the telescopic rod of the cylinder 511 passes through the support bar 58 and is fixed on the inner hollow bar 510.

[0034] The workers clamp and fix the two pipes that need to be welded together using two pipe support mechanisms 3. The support wheels in the support can be adjusted to the appropriate position according to the diameter of the pipe. The position of the support set on the sliding seat in the pipe support mechanism 3 can be adjusted according to the length of the pipe. After the pipe is fixed, the two ends of the pipe on the two pipe support mechanisms 3 are moved to the middle of the ring in the welding mechanism 4 by the adjustment mechanism 7 to align and close.

[0035] By rotating the screw 512 with the knob, the screw 512 rotates, causing the limiting plate 514 to rise and fall vertically. When the limiting plate 514 rises and falls, it will drive the central hole pushing arm 513 to move up and down until one end of the central hole pushing arm 513 moves to a position above the center line of the corresponding pipe. Then, the cylinder 511 is activated, and the telescopic rod of the cylinder 511 extends, driving the inner hollow bar 510 to approach the pipe. One end of the central hole pushing arm 513 will push the flexible inner insert 54 and the flexible inner connecting strip 55 to wrap around the pipe. When the central hole pushing arm 513 is driven by the inner hollow bar 510 to approach the pipe, it will gradually move upward under the curvature limit and guidance of the outer surface of the pipe, thereby smoothing the flexible inner insert 54 and the flexible inner connecting strip 55 so that they are tightly attached to the outer surface of the pipe. The flexible inner insert 54 will then be inserted into the flexible inner connecting strip 55 to ensure that the wrapping airbag layer 57 on the flexible inner insert 54 and the flexible inner connecting strip 55 can close on the pipe.

[0036] like Figures 5-10As shown, both the flexible inner insert strip 54 and the flexible inner connecting strip 55 have grooves 515 on their inner sides, and the two grooves 515 are connected. The grooves 515 are positioned on the side of the flexible inner insert strip 54 and the flexible inner connecting strip 55 that can contact the pipe. The sealing components include a hollow sealing strip 516 disposed inside the groove 515, a connecting plate 517 fixed between the bottoms of the two sliding frames 51, two second slide rails 522 fixed to the bottom of the frame 1, and a hydraulic cylinder 518 and two air cylinders 519 fixed to the bottom of the frame 1. Only one air cylinder 519 can be used, but the air volume in the air cylinder 519 must be sufficient to inflate the airbag layer 57 and the hollow sealing strip 516 to the working state. Both air cylinders 519 have piston plates 520 disposed inside their inner sides, and the two piston plates 520 are fixed together. There is a connecting frame 521, which is fixedly connected to the corresponding connecting plate 517. One end of each of the two air cylinders 519 is connected to the hollow sealing strip 516 and the airbag layer 57 through a three-port connecting pipe. Two automatic one-way valves are installed in the air cylinder 519 where the three-port connecting pipe is set: one one-way air inlet valve to ensure that the air cylinder 519 can inject internal air into the hollow sealing strip 516 and the airbag layer 57, and one one-way air outlet valve so that the air in the hollow sealing strip 516 and the airbag layer 57 can be drawn into the air cylinder 519. The connecting frame 521 is slidably connected by two connecting blocks and two second slide rails 522 to ensure that the connecting frame 521 can stably push and pull the piston plate 520. One end of the telescopic rod of the oil cylinder 518 is fixedly connected to the connecting plate 517.

[0037] After the airbag layer 57 is wrapped around the pipe, the hydraulic cylinder 518 is activated. The extension rod of the hydraulic cylinder 518 extends and pushes the connecting plate 517 connected to it to the welding mechanism 4. During the movement, the connecting plate 517 will drive the sliding frame 51 connected to it and the wrapping parts to move towards the welding mechanism 4. At the same time, the connecting plate 517 will drive the piston plate 520 to move in the air cylinder 519 through the connecting frame 521, and fill the hollow sealing strip 516 and the airbag layer 57 with gas from the air cylinder 519 through the three-port connecting pipe. The hollow sealing strip 516 bulges to ensure that the flexible inner insert 54 and the flexible inner connector 55 can seal the position where they contact the pipe. The airbag layer 57 in the two protective parts bulges to close on both sides of the welding head. Because the airbag layer 57 is soft and deformable, when the welding head rotates in the ring to weld the gap in the pipe, it can pass smoothly between the two wrapping parts and keep the two wrapping parts closed at all times, preventing external airflow from blowing in from the gap between the two and affecting the welding effect.

[0038] After welding is completed, the telescopic rod of the hydraulic cylinder 518 retracts, pulling the connecting plate 517 away from the welding mechanism 4. At the same time, the connecting frame 521 pulls the piston plate 520 away from the three-port connecting pipe setting, drawing the gas in the hollow sealing strip 516 and the air-bag layer 57 back into the air cylinder 519, thereby causing the hollow sealing strip 516 and the air-bag layer 57 to collapse for use in the next round of welding.

[0039] like Figures 5-10 As shown, a groove 523 is provided on one side of both the flexible inner insert strip 54 and the flexible inner connecting strip 55. The two grooves 523 are connected. The grooves 523 and the flexible hollow layer 56 are located on the same side. The cooling components include a cooling box 524 fixed to the top of the frame 1 and water-conducting heat exchange pipes 525 embedded inside the two grooves 523. A semiconductor cooling chip 526 is installed inside the cooling box 524. The heat dissipation end of the semiconductor cooling chip 526 is located outside the cooling box 524, and the cooling element is located inside the cooling box 524. A water pump 527 is fixed to the top of the cooling box 524. The water inlet of the water pump 527 extends to the cooling box 524 through a water inlet pipe. Inside, the outlet of the water pump 527 is connected to two hoses 528 through a three-way pipe. One end of each hose 528 is connected to two water-conducting heat exchange pipes 525. One end of each water-conducting heat exchange pipe (525) is connected to the cooling box (524) through a pipe. The working principle and wiring method of the variable frequency motor, servo motor, hydraulic cylinder, variable speed motor, cylinder 511, oil cylinder 518, semiconductor cooling chip 526 and water pump 527 mentioned in this embodiment are all commonplace. They are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selection according to their needs or convenience.

[0040] During welding, the water pump 527 is started to draw water cooled by the semiconductor cooling chip 526 in the cooling box 524 through a three-way pipe to two hoses 528. The water then enters two water-conducting heat exchange pipes 525 respectively. After the water-conducting heat exchange pipes 525 are full, they return to the cooling box 524 through the return pipe to continue cooling and recycling. The circulating cold water can continuously and efficiently absorb the heat from the welding arc radiation, the conduction of the molten pool and the high-temperature weld seam through the pipe wall of the water-conducting heat exchange pipes 525, significantly reducing the air temperature in the welder's operating area, improving the working environment, maintaining equipment stability, providing a relatively mild operating environment for core precision components and preventing failure due to overheating.

[0041] A method for welding equipment for pipelines in water conservancy construction includes the following steps: Step 1: The pipe is clamped, fixed, and closed at the welding point of the welding mechanism 4 using the pipe support mechanism 3; Step 2: The wrapping component in the quality enhancement component 5 wraps the welding area of ​​different types of pipes to form a welding protection space. The cooling component absorbs the heat from the welding arc radiation, the conduction of the molten pool and the heat released by the high-temperature weld, thereby reducing the air temperature in the welder's operating area, improving the working environment and maintaining equipment stability.

[0042] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A welding equipment for pipelines in water conservancy construction, characterized in that, include: The frame (1) has two horizontal slots (2) on its top, and two pipe support mechanisms (3) and welding mechanisms (4) are provided above the frame (1). The quality enhancement component (5) includes two protective components disposed on the top of the frame (1), two sealing components disposed on the bottom of the frame (1), and a cooling component. The protective components include sliding frames (51) that slide on the inner side of two transverse grooves (2), a wrapping component, and two wrapping aids. Each of the two sliding frames (51) is fixed with a first slide rail (52). The wrapping component is disposed between the two sliding frames (51) and is used to wrap around the pipe welding area. The two wrapping aids are disposed on the two sliding frames (51) and are used to wrap the wrapping component around pipes of different sizes. The two sealing components close the two wrapping components and help seal the contact position between the wrapping component and the pipe.

2. The welding equipment for pipelines in water conservancy construction according to claim 1, characterized in that, The package includes two gravity sliders (53), which slide on two first slide rails (52) respectively. A flexible inner insert (54) and a flexible inner connecting strip (55) are fixed on the two gravity sliders (53) respectively. One end of the flexible inner insert (54) and the flexible inner connecting strip (55) are fixedly connected. A flexible hollow layer (56) is fixed between one side of the flexible inner insert (54) and the flexible inner connecting strip (55). An airbag layer (57) is provided on the inner side of the flexible hollow layer (56).

3. The welding equipment for pipelines in water conservancy construction according to claim 1, characterized in that, The wrapping aid includes a support bar (58) fixed to one side of the sliding frame (51), two through rods (59) are provided on the support bar (58), an inner hollow bar (510) is fixed between one end of the two through rods (59), a variable pushing member is provided on the inner side of the inner hollow bar (510), and a cylinder (511) is fixed on the support bar (58). One end of the telescopic rod of the cylinder (511) passes through the support bar (58) and is fixed on the inner hollow bar (510).

4. The welding equipment for pipelines in water conservancy construction according to claim 3, characterized in that, The variable pushing component includes a lead screw (512) that rotates inside the hollow bar (510) and a central hole pushing arm (513) that slides inside the hollow bar (510). One end of the lead screw (512) extends to the top of the hollow bar (510) and is fixed with a knob. The outer surface of the lead screw (512) is threadedly connected to a limit plate (514). The lead screw (512) passes through the central hole on the central hole pushing arm (513), and the inner diameter of the central hole is larger than the diameter of the lead screw (512).

5. The welding equipment for pipelines in water conservancy construction according to claim 2, characterized in that, The inner sides of the flexible inner insert (54) and the flexible inner connecting strip (55) are provided with grooves (515), and the two grooves (515) are connected. The sealing element includes a hollow sealing strip (516) provided on the inner side of the groove (515), a connecting plate (517) fixed between the bottoms of the two sliding frames (51), and an oil cylinder (518) and two air cylinders (519) fixed on the bottom of the frame (1). The inner sides of the two air cylinders (519) are provided with piston plates (520), and a connecting frame (521) is fixed between the two piston plates (520). The connecting frame (521) and the connecting plate (517) are fixedly connected. One end of the two air cylinders (519) is connected to the hollow sealing strip (516) and the airbag layer (57) through a three-port connecting pipe.

6. The welding equipment for pipelines in water conservancy construction according to claim 5, characterized in that, The sealing element also includes two second slide rails (522) fixed to the bottom of the frame (1), the connecting frame (521) is slidably connected by two connecting blocks and two second slide rails (522), and one end of the telescopic rod of the oil cylinder (518) is fixedly connected to the connecting plate (517).

7. The welding equipment for pipelines in water conservancy construction according to claim 2, characterized in that, The flexible inner insert (54) and the flexible inner connector (55) are provided with a groove (523) on one side. The two grooves (523) are connected. The cooling component includes a cooling box (524) fixed to the top of the frame (1) and a water-conducting heat exchange pipe (525) embedded in the inner side of the two grooves (523). The inner side of the cooling box (524) is equipped with a semiconductor cooling chip (526). A water pump (527) is fixed to the top of the cooling box (524). The outlet of the water pump (527) is connected to two hoses (528) through a three-way pipe. One end of the two hoses (528) is connected to the two water-conducting heat exchange pipes (525) respectively. One end of the two water-conducting heat exchange pipes (525) is connected to the cooling box (524) through a pipe.

8. The welding equipment for pipelines in water conservancy construction according to claim 1, characterized in that, The top of the frame (1) is provided with an installation groove (6), and an adjustment mechanism (7) is installed on the inner side of the installation groove (6). The adjustment mechanism (7) is used to adjust the support spacing of the two pipe support mechanisms (3).

9. A method for welding equipment for water conservancy construction pipelines, the method being applied to the welding equipment for water conservancy construction pipelines as described in claim 1, comprising the following steps: Step 1: The pipe is clamped, fixed, and closed at the welding joint of the welding mechanism (4) by the pipe support mechanism (3); Step 2: The wrapping component in the quality enhancement component (5) wraps the welding area of ​​different types of pipes to form a welding protection space. The cooling component absorbs the heat from the welding arc radiation, the conduction of the molten pool and the heat released by the high-temperature weld, thereby reducing the air temperature in the welder's operating area, improving the working environment and maintaining equipment stability.

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