Natural gas pipeline welding equipment

Abstract

The invention relates to the technical field of natural gas pipelines, and discloses natural gas pipeline welding equipment which comprises a supporting base, a supporting piece used for fixing a pipeline body is arranged on the supporting base, a plurality of sets of connecting rods are fixed to the supporting piece, and fixing rings are fixed to the ends of the connecting rods. The inner side of the fixing ring is rotationally connected with a gear ring, a height-adjustable welding gun is arranged on the inner surface of the gear ring, and the gear ring rotates around the fixing ring to enable the welding gun to weld the circumference of the pipeline body. According to the technical scheme, before the two pipeline bodies are welded and installed, the end faces of the pipeline bodies can be polished through the polishing roller, impurities on the surfaces of the pipeline bodies can be conveniently removed, the welding quality is improved, meanwhile, when the polishing roller polishes the end faces of the pipeline bodies, the polishing roller can reciprocate left and right, and the polishing efficiency is improved. Left-right shaking grinding of the grinding roller is achieved, and the grinding effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas pipelines, in particular to natural gas pipeline welding equipment. Background Art

[0002] A natural gas pipeline is a pipeline used to transport natural gas from the mining site or processing plant to the urban gas distribution center or industrial enterprise. It is a way to transport natural gas in large quantities on land. When installing a natural gas pipeline, the end faces of the two natural gas pipelines need to be welded. Welding plays a vital role in the installation of natural gas pipelines. The main purpose is to ensure the reliability and safety of pipeline connections. Welding can ensure the sealing, mechanical properties and corrosion resistance of the pipeline, thereby preventing the occurrence of natural gas leaks.

[0003] When welding two natural gas pipelines, the surface of the welded natural gas pipelines needs to be cleaned, which may include removing surface oxides, rust, oil stains or other impurities. If the two natural gas pipelines are welded directly, if the welded surface has the above-mentioned surface oxides, rust, oil stains or other impurities, the electric welding joint will be disturbed by the impurities, which may easily lead to quality problems such as loose welding or cracks, thus posing a threat to the transportation safety of natural gas. Summary of the invention

[0004] The present invention provides a natural gas pipeline welding device. By arranging a grinding wheel, the end face of the pipeline body can be polished by a grinding roller before the two pipeline bodies are welded and installed, so as to facilitate the removal of impurities on the surface of the pipeline body. This solves the problem mentioned in the above background technology that if there are oxides, rust, oil stains or other impurities on the welding surface, the electric welding joint will be disturbed by the impurities, which may easily lead to quality problems such as loose welding or cracks, thereby posing a threat to the transportation safety of natural gas.

[0005] The present invention provides the following technical solution: a natural gas pipeline welding device, comprising a support base, a support member for fixing a pipeline body is arranged on the support base, a plurality of groups of connecting rods are fixed on the support member, a fixing ring is fixed to the ends of the plurality of groups of connecting rods, a gear ring is rotatably connected to the inner side of the fixing ring, a welding gun with adjustable height is arranged on the inner surface of the gear ring, and the welding gun welds a circumference of the pipeline body by rotating the gear ring around the fixing ring; A slideway is provided on the gear ring, a slide rod is slidably arranged in the slideway, a first track groove for the slide rod to slide is provided inside the fixed ring, a positioning plate is fixed to the end of the slide rod, a positioning frame with adjustable height is provided on the inner side of the positioning plate, a rotating shaft is rotatably arranged on the inner side of the positioning frame, and a grinding roller is fixed to the end of the rotating shaft.

[0006] As an optional solution for the natural gas pipeline welding equipment described in the present invention, the support member includes a side plate fixed on the support base, a first servo electric cylinder is fixed on the side plate, and a clamping plate for clamping and fixing the pipeline body is fixed at the output end of the first servo electric cylinder.

[0007] As an optional solution for the natural gas pipeline welding equipment described in the present invention, a first servo motor is fixed to the outer surface of the fixed ring, the output end of the first servo motor is connected to a transmission gear, a rotating groove for rotating the transmission gear is opened inside the fixed ring, and the transmission gear is meshed with the gear ring.

[0008] As an optional solution for the natural gas pipeline welding equipment described in the present invention, a connecting seat is fixed to the inner surface of the gear ring, a second servo electric cylinder is fixed on the connecting seat, a mounting seat for mounting the welding gun is fixed to the output end of the second servo electric cylinder, a third servo electric cylinder is fixed to the surface of the positioning plate, the output end of the third servo electric cylinder is fixedly connected to the positioning frame, a second servo motor is fixed to the outer surface of the positioning frame, and the output end of the second servo motor is connected to the end of the rotating shaft.

[0009] As an optional solution for the natural gas pipeline welding equipment described in the present invention, a limiting ring is fixed on the gear ring, and a limiting ring groove is provided on the inner surface of the fixed ring for the limiting ring to rotate. A limiting block is fixed on the end of the sliding rod, and the limiting block is slidably arranged in the first trajectory groove.

[0010] As an optional scheme of the natural gas pipeline welding equipment described in the present invention, a plurality of groups of blowing holes are provided on the grinding roller, an air guide groove connected to the blowing holes is provided inside the rotating shaft and the grinding roller, an air pump connected to the air guide groove is fixed on the positioning frame, a sealing plate for opening and closing the blowing holes is slidably arranged inside the grinding roller, a through groove is provided on the sealing plate, an annular groove for sliding the sealing plate is provided on the positioning frame, a first sliding protrusion is fixed on the end of the sealing plate, and a second track groove for sliding the first sliding protrusion is provided on the inner wall of the annular groove.

[0011] As an optional solution of the natural gas pipeline welding equipment of the present invention, the second trajectory groove includes a horizontal portion, a first inclined portion and a second inclined portion which are connected in sequence.

[0012] As an optional solution for the natural gas pipeline welding equipment described in the present invention, a resistance plate slidably arranged inside the grinding roller is fixed on the sealing plate, a hinge seat is fixed in the blowing hole, an air guide plate is rotatably connected to the hinge seat, a resistance rod is movably connected to the surface of the air guide plate, and a sliding groove for the resistance rod to slide is provided inside the resistance plate.

[0013] As an optional solution of the natural gas pipeline welding equipment of the present invention, a second sliding protrusion is fixed to the end of the abutment rod, and an inclined groove for sliding the second sliding protrusion is provided inside the slide groove.

[0014] As an optional solution for the natural gas pipeline welding equipment of the present invention, a limiting ball is fixed to the end of the abutment rod, and a groove for the limiting ball to slide is provided on the air guide plate.

[0015] The present invention has the following beneficial effects: 1. In the natural gas pipeline welding equipment, after the pipeline body is butt-jointed, the grinding wheel is driven to rotate by the second servo motor, and the position of the grinding wheel is adjusted by the third servo electric cylinder so that the grinding wheel contacts the surface of the pipeline body, and then the transmission gear is driven to rotate by the first servo motor, and the transmission gear drives the gear ring to rotate, and the gear ring drives the grinding wheel to rotate in a circle around the pipeline body while rotating, so as to facilitate the grinding of one circle of the pipeline body. At the same time, when the grinding wheel grinds one circle of the pipeline body, the sliding rod slides in the first track groove so that the sliding rod can reciprocate left and right. The sliding rod reciprocates left and right, which can drive the grinding wheel to reciprocate left and right, so that the grinding wheel shakes and grinds the surface of the pipeline body left and right, thereby improving the grinding effect, effectively removing the possibility of oxides, rust, oil stains or other impurities on the surface of the pipeline body, and is conducive to improving the welding quality.

[0016] 2. In the natural gas pipeline welding equipment, when the grinding wheel is grinding the pipeline body, air is supplied into the air guide groove through the air pump, and the air guide groove blows out the gas through the blowing hole, and the blown gas is used to blow air to the grinding surface, so as to remove impurities and debris left by grinding, ensure the cleanliness of the grinding surface, and further improve the quality of welding. At the same time, when blowing air through the blowing hole, a sealing plate is set, and the sealing plate slides inside the annular groove. The sealing plate drives the first sliding protrusion to slide in the second track groove, so that the sealing plate can open and close the blowing hole, so that the blowing hole blows air when turning to the grinding surface of the pipeline body, and the blowing hole is closed when turning out of the grinding surface of the pipeline body, so as to facilitate the control of the opening and closing of the blowing hole, avoid gas waste, and reduce the consumption of the air pump.

[0017] 3. In the natural gas pipeline welding equipment, when the air hole blows air to the polished surface of the pipeline body, the air guide plate is set to change the direction of the gas blown out of the air hole, so that the blown gas can be blown to a smaller range of the pipeline body surface. When the time from opening to closing of the air hole remains unchanged and the rotation speed of the grinding roller remains unchanged, the gas is blown to a smaller range of the pipeline body surface. Within this range, the blowing time for each part of the pipeline body is longer, thereby further improving the effect of blowing to remove impurities and reducing the possibility of impurity residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the support member in the present invention.

[0020] Figure 3 It is a structural schematic diagram of the front side of the fixing ring in the present invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 It is a schematic structural diagram of the back side of the fixing ring in the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0024] Figure 7 It is a cross-sectional view of the cross-sectional structure of the fixing ring part of the present invention.

[0025] Figure 8 It is a schematic diagram of the top view of the structure of the first track groove inside the fixing ring in the present invention.

[0026] Fig. 9 For the present invention Figure 7 Enlarged view of center C.

[0027] Fig.10 For the present invention Fig. 9 Schematic diagram of the top view of the second track groove inside the positioning frame.

[0028] Fig.11 It is a structural cross-sectional view of the interior of the blowing hole of the present invention.

[0029] Fig.12 For the present invention Fig.11 Enlarged view of point D in the middle.

[0030] Fig.13 For the present invention Fig.12 Enlarged view of point E in the middle.

[0031] Fig.14 For the present invention Fig.13 Schematic diagram of the top view of the middle contact plate part.

[0032] In the figure: 1, support base; 2, support member; 201, side plate; 202, first servo electric cylinder; 203, clamping plate; 3, connecting rod; 4, fixing ring; 5, gear ring; 6, welding gun; 7, slideway; 8, slide rod; 9, first track groove; 10, positioning plate; 11, positioning frame; 12, rotating shaft; 13, grinding roller; 14, first servo motor; 15, transmission gear; 16, rotating groove; 17, connecting seat; 18, second servo electric cylinder; 19, mounting seat; 20, third servo electric cylinder; 21, second servo motor; 22 , limit ring; 23, limit ring groove; 24, limit block; 25, blowing hole; 26, air guide groove; 27, air pump; 28, blocking plate; 29, through groove; 30, annular groove; 31, first sliding protrusion; 32, second track groove; 321, horizontal part; 322, first inclined part; 323, second inclined part; 33, contact plate; 34, hinged seat; 35, air guide plate; 36, contact rod; 37, slide groove; 38, second sliding protrusion; 39, inclined groove; 40, card slot; 41, pipeline body; 42, limit ball. DETAILED DESCRIPTION

[0033] 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.

[0034] For example, see Figure 1-Figure 14 A natural gas pipeline welding device comprises a support base 1, a support member 2 for fixing a pipeline body 41 is arranged on the support base 1, a plurality of groups of connecting rods 3 are fixed on the support member 2, a fixing ring 4 is fixed to the ends of the plurality of groups of connecting rods 3, a gear ring 5 is rotatably connected to the inner side of the fixing ring 4, a welding gun 6 with adjustable height is arranged on the inner surface of the gear ring 5, and the gear ring 5 rotates around the fixing ring 4 so that the welding gun 6 welds a circumference of the pipeline body 41; A slideway 7 is provided on the gear ring 5, a slide bar 8 is slidably provided in the slideway 7, a first track groove 9 for the slide bar 8 to slide is provided inside the fixed ring 4, a positioning plate 10 is fixed to the end of the slide bar 8, a positioning frame 11 with adjustable height is provided inside the positioning plate 10, a rotating shaft 12 is rotatably provided inside the positioning frame 11, and a grinding roller 13 is fixed to the end of the rotating shaft 12; The support member 2 includes a side plate 201 fixed on the support base 1, a first servo electric cylinder 202 is fixed on the side plate 201, and a clamping plate 203 for clamping and fixing the pipe body 41 is fixed at the output end of the first servo electric cylinder 202; A first servo motor 14 is fixed to the outer surface of the fixing ring 4, and a transmission gear 15 is connected to the output end of the first servo motor 14. A rotation groove 16 for the transmission gear 15 to rotate is provided inside the fixing ring 4, and the transmission gear 15 is meshed with the gear ring 5; A connecting seat 17 is fixed to the inner surface of the gear ring 5, a second servo electric cylinder 18 is fixed to the connecting seat 17, a mounting seat 19 for mounting the welding gun 6 is fixed to the output end of the second servo electric cylinder 18, a third servo electric cylinder 20 is fixed to the surface of the positioning plate 10, the output end of the third servo electric cylinder 20 is fixedly connected to the positioning frame 11, a second servo motor 21 is fixed to the outer surface of the positioning frame 11, and the output end of the second servo motor 21 is connected to the end of the rotating shaft 12; A limit ring 22 is fixed on the gear ring 5 , a limit ring groove 23 is formed on the inner surface of the fixed ring 4 for the limit ring 22 to rotate, a limit block 24 is fixed on the end of the slide rod 8 , and the limit block 24 is slidably arranged in the first track groove 9 .

[0035] In the technical solution, before the two pipe bodies 41 are welded, the pipe bodies 41 are first clamped and fixed by the support member 2, specifically: the clamping plate 203 is pushed to move by the first servo electric cylinder 202, and the clamping plate 203 clamps and fixes the two sides of the pipe body 41. The inner surface of the clamping plate 203 adopts a V-shaped design, which can conveniently clamp the pipe bodies 41 of different diameters. After the pipe bodies 41 are clamped and fixed, the fixing ring 4 is located outside the ends of the two pipe bodies 41, and the welding gun 6 is located at the connection between the two pipe bodies 41; When the two pipe bodies 41 are welded, the rotating shaft 12 is first driven to rotate by the second servo motor 21, and the rotating shaft 12 drives the grinding roller 13 to rotate, and then the positioning frame 11 is pushed to move by the third servo electric cylinder 20, and the positioning frame 11 drives the grinding roller 13 to move, so that the grinding roller 13 contacts the surface of the pipe body 41, and then the transmission gear 15 is driven to rotate by the first servo motor 14, and the transmission gear 15 drives the gear ring 5 to rotate, and the gear ring 5 drives the grinding roller 13 to perform a circular motion around the pipe body 41, so as to complete the grinding process of the pipe body 41; when the gear ring 5 rotates, it drives the slide bar 8 to slide in the first track groove 9, and the first track groove 9 is set as a wave-shaped groove, so that when the slide bar 8 slides in the first track groove 9, the slide bar 8 can reciprocate left and right along the slideway 7, and the reciprocating left and right motion of the slide bar 8 can drive the grinding roller 13 to reciprocate left and right, so that the grinding roller 13 performs a reciprocating left and right motion while grinding along a circle of the pipe body 41, thereby improving the grinding effect; After grinding is completed, the grinding wheel is reset and stops rotating, and the welding gun 6 is pushed by the second servo electric cylinder 18 to move to the position where welding is required. At the same time, the welding gun 6 is driven to rotate by the rotation of the gear ring 5, so that the welding gun 6 rotates around the connection between the two pipe bodies 41 for one circle, and the two pipe bodies 41 are welded in a circular manner to complete the welding installation work.

[0036] In the present technical solution, by setting the limiting ring groove 23 and the limiting ring 22, when the gear ring 5 rotates, the limiting ring 22 slides in the limiting ring groove 23, thereby improving the stability of the gear ring 5 during rotation and preventing the gear ring 5 from being misaligned with the fixed ring 4. By setting a limiting block 24 at the end of the slide rod 8, the limiting block 24 can only slide along the first track groove 9, so that the end of the slide rod 8 is always in the first track groove 9 to prevent it from being out of the groove.

[0037] In the second embodiment, when the pipe body 41 is polished, foreign debris will be attached to the surface of the pipe body 41. If the port is directly welded and installed, the foreign debris will be easily welded to the welding part of the pipe body 41, causing corrosion, affecting the quality of the welding at the connection between the two pipe bodies 41, thereby reducing the stability of the connection. In view of this problem, this embodiment is an improvement made on the basis of the first embodiment. For details, please refer to Figure 1-Figure 14 The grinding roller 13 is provided with a plurality of groups of air blowing holes 25, and the rotating shaft 12 and the grinding roller 13 are provided with air guide grooves 26 connected with the air blowing holes 25. The positioning frame 11 is fixed with an air pump 27 connected with the air guide grooves 26. A blocking plate 28 for opening and closing the air blowing holes 25 is slidably provided in the grinding roller 13, and a through groove 29 is provided on the blocking plate 28. The positioning frame 11 is provided with an annular groove 30 for sliding the blocking plate 28. A first sliding protrusion 31 is fixed to the end of the blocking plate 28, and a second track groove 32 for sliding the first sliding protrusion 31 is provided on the inner wall of the annular groove 30; The second track groove 32 includes a horizontal portion 321 , a first inclined portion 322 , and a second inclined portion 323 which are sequentially connected and arranged.

[0038] In the technical solution, when the grinding roller 13 grinds the surface of the pipe body 41, the air pump 27 supplies air into the air guide groove 26, and the air guide groove 26 discharges the air through the blowing hole 25. The blowing hole 25 blows the gas to the surface of the pipe body 41, and the impurities and debris generated by grinding on the surface of the pipe body 41 are blown away by blowing, thereby ensuring the cleanliness of the welding surface of the pipe body 41. When the blowing hole 25 is blowing, specifically: the grinding roller 13 rotates to drive the blocking plate 28 to rotate, so that the end of the blocking plate 28 slides in the annular groove 30, such as Fig.11 As shown, the grinding roller 13 rotates counterclockwise, and when the blowing hole 25 rotates to a, as shown in FIG. Fig.10As shown, the blocking plate 28 inside the blowing hole 25 at a drives the first sliding protrusion 31 to slide to the right end of the first inclined portion 322, and the blocking plate 28 continues to rotate, so that the first sliding protrusion 31 slides along the right end of the first inclined portion 322 to the left end, and the blocking plate 28 moves to the left. Fig. 9 As shown, the blocking plate 28 drives the through slot 29 to move to the left, so that the through slot 29 is connected to the blowing hole 25, thereby quickly opening the blowing hole 25 for blowing. At this time, the blowing hole 25 rotates to position b. When the blocking plate 28 continues to rotate, the blocking plate 28 drives the first sliding protrusion 31 to slide along the second inclined portion 323, so that the first sliding protrusion 31 slides from the left end to the right end of the second inclined portion 323, and the blocking plate 28 moves to the right. The blocking plate 28 moves to the right, so that the through slot 29 and the blowing hole 25 are misaligned, the blowing hole 25 is blocked, and the blowing hole 25 is no longer blowing. At this time, the blowing hole 25 rotates to position c.

[0039] In summary, whenever the blowing hole 25 on the grinding roller 13 drives the blocking plate 28 to rotate to Fig.11 When it is at position a in the figure, the blowing hole 25 is opened for blowing treatment, and when it is rotated to position b, the blowing hole 25 is closed and no blowing treatment is performed, so that the blowing hole 25 only blows air at the position from position a to position b, and does not blow air at other positions, thereby avoiding gas waste and reducing the consumption of the air pump 27.

[0040] In the third embodiment, since the airflow direction in the air hole 25 is always blowing along the direction of the air hole 25 when the air hole 25 is blowing, the air hole 25 has a wider blowing range when blowing. Under the condition of the same rotation speed, the time from opening to closing of the air hole 25 is the same. Since the air blowing range is wider, the air blowing time allocated to each part is also shorter, which may easily lead to poor air blowing effect and affect the removal effect of impurities and debris. In view of this problem, this embodiment is an improvement made on the basis of the second embodiment. For details, please refer to Figure 1-Figure 14 A resistance plate 33 slidably arranged inside the grinding roller 13 is fixed on the blocking plate 28, a hinge seat 34 is fixed inside the air blowing hole 25, an air guide plate 35 is rotatably connected to the hinge seat 34, a resistance rod 36 is movably connected to the surface of the air guide plate 35, and a slide groove 37 for the resistance rod 36 to slide is provided inside the resistance plate 33; A second sliding protrusion 38 is fixed to the end of the abutting rod 36, and an inclined groove 39 for the second sliding protrusion 38 to slide is provided inside the sliding groove 37; A limiting ball 42 is fixed to the end of the abutting rod 36 , and a slot 40 for the limiting ball 42 to slide is formed on the air guide plate 35 .

[0041] In the present technical solution, the length of the second inclined portion 323 is longer than the length of the first inclined portion 322, so the opening speed of the blowing hole 25 is faster than the closing speed. Fig. 9As shown, the aperture of the through slot 29 is larger than that of the blowing hole 25 (the aperture of the through slot 29: the aperture of the blowing hole 25 is 1.5-2:1). When the blowing hole 25 moves from point a to point b, the blocking plate 28 first drives the first sliding protrusion 31 to slide along the first inclined portion 322, so that the blocking plate 28 moves to the left. The blocking plate 28 moves to the left to connect the through slot 29 with the blowing hole 25, and the blowing hole 25 starts to blow air. When the blowing hole 25 blows air, the state of the air guide plate 35 is as shown in FIG. Fig.12 and Fig.13 As shown, at this time, air is blown through the blowing hole 25, and the air flow is guided by the air guide plate 35, which can change the direction of the air flow so that the gas is blown inwardly toward the pipe body 41, and will not be blown straight along the blowing hole 25, thereby shortening the range of the gas blowing onto the surface of the pipe body 41.

[0042] The specific process of adjusting the angle of the air guide plate 35 is as follows: first, the air blowing hole 25 rotates to position b, the air blowing hole 25 starts to blow air completely, and the blocking plate 28 continues to rotate, so that when the first sliding protrusion 31 slides to the middle position along the left end of the second inclined portion 323, the air blowing hole 25 is fully opened, and the blocking plate 28 moves to the right. In this figure, the blocking plate 28 moves inward, and the inward movement of the blocking plate 28 drives the contact plate 33 to move inward. The inward movement of the contact plate 33 causes the contact rod 36 to move in the slide groove 37, and the movement of the contact rod 36 drives the second sliding protrusion 38 to move together. Fig.14 yes Fig.13 A schematic diagram of the top view of the middle contact plate 33, Fig.13 The middle contact plate 33 moves inwardly, which is equivalent to Fig.14 The middle contact plate 33 moves upward, and the contact plate 33 moves upward so that the contact rod 36 slides in the slide groove 37, and the contact rod 36 drives the second sliding protrusion 38 to slide along the inclined groove 39. At this time, the second sliding protrusion 38 pulls the contact rod 36 into the slide groove 37. Since a limiting ball 42 is provided at the end of the contact rod 36, the limiting ball 42 is slidably set in the card groove 40, so that when the contact rod 36 moves, it can pull the air guide plate 35 to rotate; Fig.13 In the state, the abutment rod 36 is pulled into the slide groove 37, and the abutment rod 36 pulls the air guide plate 35 to rotate toward the inner wall of the air blowing hole 25, thereby changing the direction of the air guide plate 35; Then, when the first sliding protrusion 31 slides to the right end along the middle position of the second inclined portion 323, the through groove 29 and the air blowing hole 25 begin to be misaligned, until the through groove 29 and the air blowing hole 25 are completely misaligned, and the air blowing hole 25 is completely closed. At this time, the air guide plate 35 rotates to be parallel to the inner wall of the air blowing hole 25. At this time, the air guide plate 35 rotates to position c. During this process, when the air blowing hole 25 rotates to blow air, the direction of the air guide plate 35 is adjusted, so that the wind direction range of the air blowing hole 25 blowing to the surface of the pipeline body 41 is reduced, thereby increasing the blowing time of the gas to the part of the pipeline body 41, which is conducive to improving the effect of blowing and removing impurities in this part; When the air hole 25 rotates from position c to position a, the air hole 25 and the air guide plate 35 remain unchanged. When the air hole 25 rotates from position a to position b, the air guide plate 35 is reset from being parallel to the inner wall of the air hole 25 to being parallel to the inner wall of the air hole 25. Fig.12 and Fig.13 The specific process is as follows: when the air guide plate 35 is reset, the first sliding protrusion 31 first slides from the horizontal portion 321 to the first inclined portion 322, and then slides along the first inclined portion 322. Fig. 9 As shown, the blocking plate 28 moves to the left, and the blocking plate 28 moves to the left. Fig.12 The blocking plate 28 moves outward, the blocking plate 28 pulls the contact plate 33 outward, the contact plate 33 moves outward and drives the contact rod 36 to reset, the contact rod 36 resets and the air guide plate 35 rotates and resets until the air hole 25 rotates to position b, and the air guide plate 35 is reset. Fig.12 state, then the blowing hole 25 is rotated from position b to position c, and the above-mentioned adjustment action of the middle air guide plate 35 is repeated; When the first sliding protrusion 31 slides from the left end of the second inclined portion 323 to the middle position, the sealing plate 28 moves to the right. At this time, the through groove 29 and the blowing hole 25 are fully connected, so that the blowing hole 25 remains fully open. When the first sliding protrusion 31 slides from the middle position of the second inclined portion 323 to the right end, the through groove 29 and the blowing hole 25 are misaligned, and the blowing hole 25 will change from an open state to a closed state.

[0043] like Fig.12 As shown, the movement mode of the air guide plate 35 near the bottom is specifically: opposite to the movement direction of the air guide plate 35 near the top, when the upper air guide plate 35 rotates toward the upper inner wall of the blowing hole 25, the lower air guide plate 35 rotates toward the lower inner wall of the blowing hole 25, so that the two air guide plates 35 are always in a parallel state, which is convenient for airflow to pass through.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A natural gas pipeline welding device, comprising a support base (1), characterized in that: The support base (1) is provided with a support member (2) for fixing the pipeline body (41), and a plurality of groups of connecting rods (3) are fixed on the support member (2), and the ends of the plurality of groups of connecting rods (3) are fixed with fixing rings (4), and the inner side of the fixing ring (4) is rotatably connected with a gear ring (5), and the inner surface of the gear ring (5) is provided with a welding gun (6) with adjustable height, and the gear ring (5) rotates around the fixing ring (4) so ​​that the welding gun (6) can weld a circle of the pipeline body (41); The gear ring (5) is provided with a slideway (7), a slide rod (8) is slidably arranged in the slideway (7), a first track groove (9) for the slide rod (8) to slide is provided inside the fixed ring (4), a positioning plate (10) is fixed at the end of the slide rod (8), a positioning frame (11) with adjustable height is arranged on the inner side of the positioning plate (10), a rotating shaft (12) is rotatably arranged on the inner side of the positioning frame (11), and a grinding roller (13) is fixed at the end of the rotating shaft (12).

2. The natural gas pipeline welding equipment according to claim 1, characterized in that: The support member (2) comprises a side plate (201) fixed on the support base (1), a first servo electric cylinder (202) being fixed on the side plate (201), and a clamping plate (203) for clamping and fixing the pipe body (41) being fixed on the output end of the first servo electric cylinder (202).

3. The natural gas pipeline welding equipment according to claim 2 is characterized in that: A first servo motor (14) is fixed on the outer surface of the fixing ring (4), and an output end of the first servo motor (14) is connected to a transmission gear (15). A rotation groove (16) for the transmission gear (15) to rotate is provided inside the fixing ring (4), and the transmission gear (15) is meshed with the gear ring (5).

4. The natural gas pipeline welding equipment according to claim 3 is characterized in that: A connecting seat (17) is fixed on the inner surface of the gear ring (5), a second servo electric cylinder (18) is fixed on the connecting seat (17), a mounting seat (19) for mounting the welding gun (6) is fixed on the output end of the second servo electric cylinder (18), a third servo electric cylinder (20) is fixed on the surface of the positioning plate (10), the output end of the third servo electric cylinder (20) is fixedly connected to the positioning frame (11), a second servo motor (21) is fixed on the outer surface of the positioning frame (11), and the output end of the second servo motor (21) is connected to the end of the rotating shaft (12).

5. The natural gas pipeline welding equipment according to claim 4 is characterized in that: A limit ring (22) is fixed on the gear ring (5), a limit ring groove (23) is provided on the inner surface of the fixed ring (4) for the limit ring (22) to rotate, and a limit block (24) is fixed on the end of the slide rod (8), and the limit block (24) is slidably arranged in the first track groove (9).

6. The natural gas pipeline welding equipment according to claim 5, characterized in that: The grinding roller (13) is provided with a plurality of groups of air blowing holes (25); the rotating shaft (12) and the grinding roller (13) are provided with an air guide groove (26) in communication with the air blowing holes (25); the positioning frame (11) is fixed with an air pump (27) in communication with the air guide groove (26); a sealing plate (28) is slidably arranged in the grinding roller (13) for opening and closing the air blowing holes (25); a through groove (29) is provided in the sealing plate (28); an annular groove (30) is provided in the positioning frame (11) for the sealing plate (28) to slide; a first sliding protrusion (31) is fixed to the end of the sealing plate (28); and a second track groove (32) is provided on the inner wall of the annular groove (30) for the first sliding protrusion (31) to slide.

7. The natural gas pipeline welding equipment according to claim 6, characterized in that: The second track groove (32) comprises a horizontal portion (321), a first inclined portion (322) and a second inclined portion (323) which are sequentially connected and arranged.

8. The natural gas pipeline welding equipment according to claim 7, characterized in that: A resistance plate (33) slidably arranged inside the grinding roller (13) is fixed on the blocking plate (28), a hinge seat (34) is fixed inside the air blowing hole (25), an air guide plate (35) is rotatably connected to the hinge seat (34), a resistance rod (36) is movably connected to the surface of the air guide plate (35), and a slide groove (37) for the resistance rod (36) to slide is provided inside the resistance plate (33).

9. The natural gas pipeline welding equipment according to claim 8, characterized in that: A second sliding protrusion (38) is fixed to the end of the resisting rod (36), and an inclined groove (39) for the second sliding protrusion (38) to slide is provided inside the sliding groove (37).

10. The natural gas pipeline welding equipment according to claim 9, characterized in that: A limiting ball (42) is fixed to the end of the abutting rod (36), and a slot (40) for the limiting ball (42) to slide is provided on the air guide plate (35).

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