Pipeline inner wall welding device

Abstract

The invention relates to the technical field of welding slag removal, and discloses a pipeline inner wall welding device which comprises an internal welding machine, the internal welding machine is arranged in a pipeline, a plurality of telescopic fixing plates are arranged on the outer side face of the front end of the internal welding machine and evenly arranged on the cambered surface of the internal welding machine, and two arc-shaped grooves are formed in front of the telescopic fixing plates. The two arc-shaped grooves are formed in the outer side face of the inner welding machine, sliding devices capable of sliding in the radial direction of the inner welding machine are arranged in the two arc-shaped grooves, and a plurality of welding heads are arranged in the center between the two sliding devices and on the outer side face of the inner welding machine and evenly distributed on the outer side face of the inner welding machine. Ventilation equipment and a polishing structure for polishing a welding seam and cleaning welding slag are arranged on one side of the welding head. According to the invention, the space formed by welding residues is reduced, the retention time of welding smoke is reduced, so that the welding residues are generated, meanwhile, the surface of the inner wall of the pipeline is smoother and more uniform, the frictional resistance during fluid flowing is reduced, and the conveying efficiency of the pipeline is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding slag removal, in particular to a pipeline inner wall welding device. Background Art

[0002] Pipeline inner wall welding is a method of performing welding processes inside the pipeline, which is usually used to connect the two ends of the pipeline or repair cracks in the pipeline. After the inner wall welding of the pipeline is completed, welding residues may remain on the inner wall of the pipeline, which is difficult to clean and may affect the use of the pipeline. The welding heat and welding exhaust gas generated during the welding process may cause the temperature inside the pipeline to rise or produce harmful gases, posing a safety hazard. A large amount of welding smoke and harmful gases such as welding smoke, oxides and volatile organic compounds will be generated during the welding process. Proper ventilation can help lower the temperature in the welding area and reduce the generation of oxides and other residues generated during the welding process. A good ventilation system can discharge these smoke and harmful gases to the outside in time to avoid their accumulation in the welding area and reduce the generation of welding residues. In view of the above problems, a pipeline inner wall welding device is proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art, and the proposed pipe inner wall welding device is intended to improve the problem that a large amount of welding residues are generated during the welding of the inner wall of the pipe in the prior art, resulting in increased energy consumption during fluid transportation and reduced pipeline transportation efficiency. The uneven surface formed by the accumulation of welding slag on the inner wall of the pipe is prone to accumulate impurities and particulate matter, which in turn causes pipeline blockage, affects the normal transportation of the fluid, and affects the use of the pipeline.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pipeline inner wall welding device, comprising an inner welder, the inner welder is arranged in the pipeline, a plurality of telescopic fixed plates are arranged on the outer side of the front end of the inner welder, and the plurality of telescopic fixed plates are evenly arranged on the arc surface of the inner welder, two arc grooves are arranged in front of the telescopic fixed plate, the two arc grooves are arranged on the outer side of the inner welder, and sliding devices that can slide radially along the inner welder are arranged in the two arc grooves, a plurality of welding heads are arranged at the center between the two sliding devices and on the outer side of the inner welder, and the plurality of welding heads are evenly distributed on the outer side of the inner welder, and ventilation equipment and a grinding structure for grinding the weld and cleaning the welding slag are arranged on one side of the welding head.

[0005] Furthermore, the sliding device includes an arc-shaped plate, a plurality of the arc-shaped plates are evenly arranged in the arc-shaped groove, a moving rod is arranged on the inner side of the arc-shaped plate, one end of the moving rod is fixed to the inner side surface of the arc-shaped plate, and the other end is fixed to the bottom surface of the arc-shaped groove, a sliding groove is arranged in the arc-shaped plate, a sliding plate is arranged between two adjacent arc-shaped plates, and the sliding plate is slidably arranged in two adjacent sliding grooves.

[0006] Furthermore, the shape of the slide plate is adapted to the shape of the slide groove, and a plurality of limit plates are radially arranged in the centers of the slide grooves. When the outer side surface of the arc-shaped plate is in contact with the inner wall of the pipe, the cross-sectional angle of the slide plate is greater than the cross-sectional angle between the limit plate and the proximal side surface of the adjacent arc-shaped plate, and is smaller than the cross-sectional angle between the two limit plates.

[0007] Furthermore, the grinding structure includes a lifting column, which is arranged on the outer side of the internal welding machine. A cleaning box is arranged above the lifting column, and a gear is arranged inside the cleaning box. One side of the gear is engaged with a gear, and a motor is arranged above the gear. A grinding box is fixedly arranged above the motor. The grinding box is a hollow structure, and a circular hole is opened on the upper surface of the grinding box and is connected to a small vacuum pump inside the grinding box.

[0008] Furthermore, a vacuum pump is arranged on the lower surface of the cleaning box, and a plurality of air extraction holes are arranged on the bottom surface of the cleaning box, and the plurality of air extraction holes are connected to a true hole pump.

[0009] Furthermore, the upper surface of the polishing box is extended to both sides, and when the polishing box moves to both ends, one end of the upper surface of the polishing box contacts the side surface of the arc plate.

[0010] Furthermore, the ventilation device includes a fixing plate, which is arranged between the two arc-shaped plates, and connecting plates are respectively extended from the lower end and the upper end of the fixing plate to the positions corresponding to the arc-shaped plates, and an exhaust fan is arranged above the connecting plate.

[0011] Furthermore, the exhaust fan at the upper end is arranged at the position close to the pipeline, and the exhaust fan at the lower end is arranged at a position close to the outer side surface of the inner welding machine.

[0012] Furthermore, the two exhaust fans are both connected to the outside.

[0013] The present invention has the following beneficial effects:

[0014] 1. Use the arc plate to place the welding residue between two arc plates to reduce the space where the welding residue is formed;

[0015] 2. Use ventilation equipment to discharge welding fumes in time, reduce the time welding fumes stay and thus produce welding residues, help lower the temperature of the welding area, and reduce the generation of oxides and other residues produced during the welding process;

[0016] 3. By moving the grinding box, the welding slag and welding residues generated after welding are removed and discharged, making the inner wall surface of the pipeline smoother and more uniform, reducing the friction resistance during fluid flow, improving the transportation efficiency of the pipeline, and at the same time smoothing the welding defects to improve the quality and reliability of the welding joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the pipeline inner wall welding device proposed by the present invention;

[0018] Figure 2 A cross-sectional view of the sliding device proposed by the present invention;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the grinding structure proposed by the present invention;

[0020] Figure 4 A side view of the ventilation device proposed by the present invention.

[0021] Legend:

[0022] 1. Internal welding machine; 2. Pipeline; 3. Telescopic fixed plate; 4. Arc groove; 5. Sliding device; 6. Welding head; 7. Ventilation equipment; 8. Grinding structure; 51. Arc plate; 52. Moving rod; 53. Slide groove; 54. Slide plate; 55. Limit plate; 71 Fixed plate; 72. Connecting plate; 73 Exhaust fan; 81. Lifting column; 82. Cleaning box; 83. Rack rail; 84. Gear; 85. Motor; 86. Grinding box; 87. Round hole; 88. Exhaust hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1-4As shown, an embodiment of the present invention is as follows: a pipeline inner wall welding device comprises an inner welding machine 1, the inner welding machine 1 is arranged in a pipeline 2, a plurality of telescopic fixing plates 3 are arranged on the outer side of the front end of the inner welding machine 1, the plurality of telescopic fixing plates 3 are evenly arranged on the arc surface of the inner welding machine 1, the telescopic fixing plates 3 can automatically telescope and contact with the inner wall of the pipeline 2, the inner welding machine 1 is fixed in the pipeline 2, two arc grooves 4 are arranged in front of the telescopic fixing plate 3, the two arc grooves 4 are arranged on the outer side of the inner welding machine 1, an arc plate 51 is arranged in the arc groove 4, a closed space is formed when the arc plate 51 moves to the outer side and fits with the inner wall of the pipeline 2, welding residues are placed between the two arc plates 51, and the space formed by welding residues is reduced, a sliding device 5 which can slide radially along the inner welding machine 1 is arranged in the two arc grooves 4, and a space between the two sliding devices 5 is formed. A plurality of welding heads 6 are arranged on the outer surface of the center and inner welding machine 1, and the plurality of welding heads 6 are evenly distributed on the outer surface of the inner welding machine 1. The welding head 6 is used for welding the inner wall of the pipeline 2. A ventilation device 7 and a grinding structure 8 for grinding the weld and cleaning the welding slag are arranged on one side of the welding head 6. The welding smoke generated by welding is discharged in time through the ventilation device 7, and the residence time of the welding smoke is reduced to generate welding residues, which helps to reduce the temperature of the welding area and reduce the generation of oxides and other residues generated during the welding process. The welding slag and welding residues generated after the welding are completed are removed and discharged by moving the grinding structure 8, so that the inner wall surface of the pipeline 2 is smoother and more uniform, the friction resistance during the flow of the fluid is reduced, the transportation efficiency of the pipeline 2 is improved, and at the same time, the welding defective part is trimmed and leveled, thereby improving the quality and reliability of the welding joint.

[0025] Furthermore, the sliding device 5 includes an arc plate 51, and multiple arc plates 51 are evenly arranged in the arc groove 4. A moving rod 52 is arranged on the inner side of the arc plate 51. One end of the moving rod 52 is fixed to the inner side of the arc plate 51, and the other end is fixed to the bottom surface of the arc groove 4. A slide groove 53 is arranged in the arc plate 51. A slide plate 54 is arranged between two adjacent arc plates 51. The slide plate 54 is slidably arranged in two adjacent slide grooves 53. The moving rod 52 is a telescopic rod that can automatically realize the telescopic function. When the moving rod 52 pushes the arc plate 51 outward, the two adjacent arc plates 51 gradually move away from each other and a gap is generated. The slide plate 54 seals the gap to prevent welding residues from splashing to the outside of the arc plate 51 through the gap during welding.

[0026] Furthermore, the shape of the slide plate 54 is adapted to the shape of the slide groove 53, and a limit plate 55 is radially arranged in the center of each of the multiple slide grooves 53. When the outer side surface of the arc plate 51 is in contact with the inner wall of the pipe 2, the cross-sectional angle of the slide plate 54 is greater than the cross-sectional angle between the limit plate 55 and the near side surface of the adjacent arc plate 51, and is smaller than the cross-sectional angle between the two limit plates 55. This prevents the arc plate 51 from moving and preventing the gap between the two adjacent arc plates 51 from being completely sealed due to the small area of ​​the slide plate 54, which makes it impossible to perform welding work in a closed space and causes the welding residues to be dispersed to various positions of the pipe 2.

[0027] Furthermore, the grinding structure 8 includes a lifting column 81, which is arranged on the outer side of the inner welding machine 1. The lifting column 81 moves the grinding box 86 toward the inner wall of the pipe 2 so that the upper surface of the grinding box 86 fits with the inner wall of the pipe 2 to perform grinding. A cleaning box 82 is arranged above the lifting column 81, and a rack 83 is arranged in the cleaning box 82. One side of the rack 83 is engaged with a gear 84. A motor 85 is arranged above the gear 84. A grinding box 86 is fixedly arranged above the motor 85. The grinding box 86 is a hollow structure. A circular hole 87 is provided on the upper surface of the grinding box 86 and is connected to a small vacuum pump inside the grinding box 86. The motor 85 rotates to drive the grinding box 86 to move back and forth on the rack 83, repeatedly grinding the welding position and the position where welding residues exist, smoothing the welding defective part, and improving the quality and reliability of the welding joint.

[0028] Furthermore, a vacuum pump is arranged on the lower surface of the cleaning box 82, and a plurality of exhaust holes 88 are arranged on the bottom surface of the cleaning box 82. The plurality of exhaust holes 88 are connected to the true hole pump, and the vacuum pump absorbs the welding residues dropped by grinding through the exhaust holes 88. The upper surface of the grinding box 86 is extended to both sides, and the grinding box 86 moves to both ends. One end of the upper surface of the grinding box 86 contacts the side of the arc plate 51, so that the upper surface of the grinding box 86 can completely contact the inner wall of the pipe 2 between the two arc plates 51 during the movement, so as to prevent some areas from being ungrinded and still having welding residues.

[0029] Furthermore, the ventilation device 7 includes a fixed plate 71, which is arranged between the two arc-shaped plates 51. The lower end and the upper end of the fixed plate 71 are respectively extended to the corresponding arc-shaped plate 51 positions to set a connecting plate 72, and an exhaust fan 73 is arranged above the connecting plate 72. The two exhaust fans 73 rotate to realize internal ventilation, which can quickly discharge the smoke generated by welding and prevent the smoke from accumulating and producing welding residues due to the smoke retention time too long.

[0030] Furthermore, the upper exhaust fan 73 is arranged near the pipe 2, and the lower exhaust fan 73 is arranged near the outer side of the inner welding machine 1. Both exhaust fans 73 are connected to the outside. The two exhaust fans 73 are arranged up and down to realize air convection and improve ventilation efficiency. At the same time, it can reduce the temperature of the welding process, reduce heat and reduce the occurrence of welding defects.

[0031] Working principle: the welding head 6 is arranged on the inner welding machine 1, and the welding head 6 can rotate around the inner welding machine 1. When welding the inner wall of the pipe 2, the inner welding machine 1 is placed at the position to be welded, and the welding head 6 is aligned with the weld seam. The multiple telescopic fixing plates 3 move outward and are supported on the pipe 2, and the inner welding machine 1 is fixed on the pipe 2. At the same time, the two arc plates 51 move outward and make the outer side surface of the arc plate 51 fit with the inner wall of the pipe 2, and the welding position is set between the two arc plates 51. At this time, the welding head 6 rotates under the drive of the inner welding machine 1 to start welding. When welding starts, the two arc plates 51 are started. The exhaust fan 73 exhausts the welding smoke generated by welding in time and increases the ventilation of the welding process to reduce the temperature. When the welding is completed, the moving rod 52 moves radially to fit the upper surface of the grinding box 86 with the pipe 2, and the motor 85, the vacuum pump and the small vacuum fan are started. The grinding box 86 is driven by the motor 85 to move on the rack 83 to grind the welding residue clean and draw it into the grinding box 86 through the small vacuum fan. At the same time, the vacuum pump also draws out the welding residue that falls into the cleaning box 82 during the grinding process. When the grinding box 86 rotates one circle, the welding residue is cleaned.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline inner wall welding device, comprising an inner welding machine (1), wherein the inner welding machine (1) is arranged in a pipeline (2), and is characterized in that: A plurality of telescopic fixing plates (3) are arranged on the outer side surface of the front end of the internal welding machine (1), and the plurality of telescopic fixing plates (3) are evenly arranged on the arc surface of the internal welding machine (1). Two arc grooves (4) are arranged in front of the telescopic fixing plates (3), and the two arc grooves (4) are arranged on the outer side surface of the internal welding machine (1). Sliding devices (5) that can slide radially along the internal welding machine (1) are arranged in the two arc grooves (4). A plurality of welding heads (6) are arranged at the center between the two sliding devices (5) and on the outer side surface of the internal welding machine (1). The plurality of welding heads (6) are evenly distributed on the outer side surface of the internal welding machine (1), and a ventilation device (7) and a grinding structure (8) for grinding the weld and cleaning the welding slag are arranged on one side of the welding head (6).

2. The pipe inner wall welding device according to claim 1, characterized in that: The sliding device (5) comprises an arc-shaped plate (51), a plurality of the arc-shaped plates (51) are evenly arranged in the arc-shaped groove (4), a moving rod (52) is arranged on the inner side of the arc-shaped plate (51), one end of the moving rod (52) is fixed to the inner side surface of the arc-shaped plate (51), and the other end is fixed to the bottom surface of the arc-shaped groove (4), a sliding groove (53) is arranged in the arc-shaped plate (51), and a sliding plate (54) is arranged between two adjacent arc-shaped plates (51), and the sliding plate (54) is slidably arranged in two adjacent sliding grooves (53).

3. The pipeline inner wall welding device according to claim 2 is characterized in that: The shape of the slide plate (54) is adapted to the shape of the slide groove (53), and a plurality of limit plates (55) are radially arranged at the inner center of each of the slide grooves (53). When the outer side surface of the arc-shaped plate (51) is in contact with the inner wall of the pipe (2), the cross-sectional angle of the slide plate (54) is greater than the cross-sectional angle between the limit plate (55) and the proximal side surface of the adjacent arc-shaped plate (51), and is less than the cross-sectional angle between the two limit plates (55).

4. The pipeline inner wall welding device according to claim 1, characterized in that: The grinding structure (8) comprises a lifting column (81), the lifting column (81) is arranged on the outer side of the inner welding machine (1), a cleaning box (82) is arranged above the lifting column (81), a rack (83) is arranged inside the cleaning box (82), one side of the rack (83) is engaged with a gear (84), a motor (85) is arranged above the gear (84), a grinding box (86) is fixedly arranged above the motor (85), the grinding box (86) is a hollow structure, a circular hole (87) is provided on the upper surface of the grinding box (86) and is connected to a small air exhauster inside the grinding box (86).

5. The pipeline inner wall welding device according to claim 4, characterized in that: A vacuum pump is arranged on the lower surface of the cleaning box (82), and a plurality of air suction holes (88) are arranged on the bottom surface of the cleaning box (82). The plurality of air suction holes (88) are connected to a true hole pump.

6. The pipeline inner wall welding device according to claim 4, characterized in that: The upper surface of the grinding box (86) is extended to both sides. When the grinding box (86) moves to both ends, one end of the upper surface of the grinding box (86) contacts the side surface of the arc plate (51).

7. The pipeline inner wall welding device according to claim 1, characterized in that: The ventilation device (7) comprises a fixing plate (71), wherein the fixing plate (71) is arranged between the two arc-shaped plates (51), and connecting plates (72) are respectively extended at the lower end and the upper end of the fixing plate (71) to the positions corresponding to the arc-shaped plates (51), and an exhaust fan (73) is arranged above the connecting plate (72).

8. The pipeline inner wall welding device according to claim 7, characterized in that: The upper exhaust fan (73) is arranged at a position close to the pipeline (2), and the lower exhaust fan (73) is arranged at a position close to the outer side surface of the inner welding machine (1).

9. The pipeline inner wall welding device according to claim 1, characterized in that: The two exhaust fans (73) are both connected to the outside.

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