A laser welding apparatus for girth welding

Abstract

The application relates to the technical field of ring welding, and discloses a laser welding device for ring welding, which comprises a base, a supporting table is fixedly installed on the upper surface of the base, a supporting column is fixedly installed on the side wall of the supporting table, a rotating disc is rotatably installed on the side wall of the supporting table, an outer welding gun and an inner welding gun are fixedly installed on the side wall of the rotating disc, and a supporting module for supporting the inner wall of a welded pipeline is arranged on the outer side of the supporting column. By controlling the rising or falling of the arc-shaped sleeve plate and cooperating with the contact wheel, the support can abut and adhere to the inner surface of the pipeline during the ring welding process, the position of the ring welding is guaranteed, the pipelines on both sides of the position cannot be displaced, the welding quality is affected, at least one group of supports and the arc-shaped sleeve plate and the arc-shaped convex plate arranged on the top of the supports are in contact and provide supporting force at all times, and the influence of the gravity of the pipeline on the laser welding operation precision of the continuously moving inner welding gun and outer welding gun is reduced.

Description

Technical Field

[0001] This invention relates to the field of ring welding technology, specifically to a laser welding device for ring welding. Background Technology

[0002] Pipeline welding is generally carried out using a circumferential welding method, which not only allows for simultaneous welding of both the inside and outside, ensuring consistent welding progress, but also increases welding speed and improves the welding processing efficiency of the equipment.

[0003] According to a public notice (Announcement No.: CN219465071U) of a laser welding device for pipe welding, the aforementioned application involves installing the welding part of the sleeve between an external laser welding head and an internal laser welding head. The external laser welding head is used to perform laser welding on the end of the outer pipe, and the internal laser welding head is used to perform laser welding on the end of the inner pipe. The laser temperatures on both sides at the same position will cause the temperature of the pipe contact area to melt, thereby achieving full laser welding of the pipe contact area and ensuring welding quality.

[0004] Existing circumferential welding technologies employ an internal and external welding design to ensure consistent welding speeds and similar cooling rates at the weld joints. However, during welding, the relative positions of the welding head and the weld seam undergo circumferential motion. Regardless of whether the pipe rotates and the welding head is fixed, or vice versa, the lack of support and positioning between the pipe seam and the welding head makes it prone to weld seam displacement during movement, affecting weld quality. Therefore, we propose a laser welding device for circumferential welding. Summary of the Invention

[0005] The purpose of this invention is to provide a laser welding device for ring welding to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser welding device for ring welding, comprising a base, a support platform fixedly mounted on the upper surface of the base, a support column fixedly mounted on the side wall of the support platform, a turntable rotatably mounted on the side wall of the support platform, a servo motor fixedly mounted on the top of the support platform, a gear fixedly mounted on the output end of the servo motor, an outer welding gun and an inner welding gun fixedly mounted on the side wall of the turntable, a support module for supporting the inner wall of the welding pipe provided on the outside of the support column, the support module comprising a mounting plate and a support arc plate, and an adsorption module for improving the adsorption and gripping force between the support arc plate and the inner wall of the pipe provided inside the support arc plate; The mounting plate is fixedly mounted on the side wall of the turntable at one end. A support is fixedly mounted on the outer wall of the mounting plate. A drive motor is fixedly mounted on the side wall of the support. A transmission rod is fixedly mounted on the output end of the drive motor. A threaded slider is slidably mounted on the inner wall of the support. An arc-shaped sleeve plate is hinged to the top of the threaded slider through a hinge rod. A contact wheel is movably mounted on the inner wall of the top of the arc-shaped sleeve plate.

[0007] Preferably, an arc-shaped convex plate is fixedly installed on the side wall of the arc-shaped sleeve plate, a roller is rotatably installed on the upper surface of the arc-shaped convex plate, a T-shaped groove is opened on the side wall of the arc-shaped sleeve plate, a T-shaped belt is slidably installed inside the T-shaped groove, and a supporting arc plate is fixedly installed on the side wall of the T-shaped belt.

[0008] Preferably, the turntable has an annular cavity on its side wall, and the inner surface of the annular cavity has teeth that mesh with the gear to achieve transmission. The number of support modules is set to multiple sets, and the multiple sets of support modules are evenly distributed in a circumferential array on the outer surface of the support column. The multiple sets of support modules can provide support inside the pipe to be welded, preventing the pipe from tilting or shifting.

[0009] Preferably, the outer surface of the transmission rod is provided with a thread that matches the threaded slider, and the inner wall of the support is provided with a groove with the same width as the threaded slider. When the drive motor starts and drives the transmission rod to rotate, the threaded slider will slide laterally along the inner wall of the support.

[0010] Preferably, there are two sets of arc-shaped protrusions, which are arranged on both sides of the arc-shaped sleeve plate. The T-shaped strip and the T-shaped groove are slidably engaged, and the curvature of the supporting arc plate is the same as that of the arc-shaped sleeve plate. The included angle between the two end faces of the supporting arc plate is greater than the included angle between the two sets of adjacent supports. Thus, during the continuous rotation of multiple sets of mounting plates and supports, at least one set of supports and the arc-shaped sleeve plate corresponding to the top of the support are always in contact with the arc-shaped protrusions and provide support force.

[0011] Preferably, the adsorption module includes a piston chamber, which is located inside the supporting arc plate. A push rod is slidably installed on the inner wall of the supporting arc plate, and a piston plate is fixedly installed at the bottom end of the push rod. A return spring is sleeved on the outer wall of the push rod. A contraction groove is formed on the arc-shaped outer wall of the supporting arc plate. A flexible tube is fixedly connected to the bottom inner wall of the contraction groove, and a suction cup is fixedly connected to the top end of the flexible tube.

[0012] Preferably, a slide rail is fixedly installed on the bottom inner wall of the shrinkage groove, a slider is slidably installed on the inner wall of the slide rail, a telescopic spring is fixedly connected between the bottom of the slider and the inner wall of the slide rail, and a coil spring is fixedly connected to the side wall of the slide rail.

[0013] Preferably, the suction cups are arranged in three sets, and the three sets of suction cups are evenly distributed in a linear array in the shrinkage groove. The suction cups are inclined to the shrinkage groove, and the inclination directions of the three sets of suction cups are intersected. This makes the suction pull directions of the multiple suction cups have a certain degree of interlacing during the contact between the supporting arc plate and the inner wall of the pipe, thereby improving the suction cup adsorption and gripping stability and anti-interference ability.

[0014] Preferably, the arc-shaped sleeve plate is provided with a locking module that restricts the direction of the contact wheel. The locking module includes a fixing rod, which is fixedly installed on the bottom inner wall of the support. An arc-shaped plate is fixedly installed at the top of the fixing rod. A rotating shaft is rotatably installed through the top inner wall of the arc-shaped sleeve plate. An outer fan-shaped block is fixedly installed on the arc-shaped outer wall at the bottom end of the rotating shaft. A limit hole is opened in the inner wall of the arc-shaped plate. A rotating rod is rotatably installed in the inner wall of the limit hole. A limit ring is fixedly connected to the end of the rotating rod. An inner fan-shaped block is fixedly installed in the arc-shaped inner wall of the limit ring. A sliding groove is opened in the inner wall of the rotating shaft. A pressing rod is slidably installed in the inner wall of the sliding groove. A small spring is fixedly connected between the side wall of the pressing rod and the sliding groove.

[0015] Preferably, the bottom edge and the top edge of the outer fan-shaped block are rounded to avoid motion interference when there is relative movement between the arc plate and the rotating shaft.

[0016] Compared with the prior art, the present invention provides a laser welding device for ring welding, which has the following beneficial effects: 1. This laser welding equipment for ring welding controls the opposing movement of two sets of threaded sliders within the support, and, in conjunction with a hinged rod, controls the raising or lowering of the arc-shaped sleeve plate on the support. Multiple contact wheels on the outer side of the arc-shaped sleeve plate ensure that the support and arc-shaped sleeve plate are tightly pressed against and adhered to the inner surface of the pipe during ring welding, achieving support and stability. This prevents displacement of the pipe on both sides of the ring welding position, thus ensuring welding quality. Simultaneously, it ensures that at least one set of supports and the corresponding arc-shaped sleeve plate and arc-shaped protrusion plate on the top of the supports are always in contact, providing support and reducing the impact of the pipe's own weight on the accuracy of the continuously moving inner and outer welding torches during laser welding.

[0017] 2. In the laser welding equipment used for ring welding, during the lifting of the supporting arc plate, the top of the abutment is squeezed by the inner wall of the pipe and pushes the piston plate downward in the piston chamber. In conjunction with the through hole and hose in the contact groove, the air inside the suction cup is sucked up. At this time, multiple sets of suction cups arranged in a cross pattern in the contact groove can be adsorbed onto the inner surface of the pipe. Moreover, the adsorption and pulling directions between the multiple suction cups have a certain degree of cross-clamping, which improves the stability and anti-interference ability of the suction cups, so that the supporting arc plate and the pipe remain relatively tight, further preventing the pipe from shifting during the welding process.

[0018] 3. In the laser welding equipment used for ring welding, during the lifting process of the arc-shaped sleeve plate, due to the relative movement of the fixed rod and the arc-shaped plate with the arc-shaped sleeve plate, the outer sector blocks will guide and restrict each other's movement until they are on the same plane. At this time, the rotating shaft drives the contact wheel to rotate until the axis direction is parallel to the pipeline axis direction, so that it can maintain a tangential state with the inner wall of the pipeline during the continuous rotation of the support. At this time, the bottom end of the rotating shaft will squeeze the ends of the extrusion rods on both sides of the limit ring, causing the other end of the extrusion rod to press against the inner wall of the arc-shaped plate, thereby restricting the rotation tendency of the limit ring in the limit hole, ensuring the stability of the rotating shaft, limit ring and contact wheel during the operation of the device, and ensuring the support and anti-slip effect of the pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the turntable structure of the present invention; Figure 3 This is a schematic cross-sectional view of the support structure of the present invention; Figure 4 This is a partial exploded view of the support module of the present invention; Figure 5 This is a schematic cross-sectional view of the arc-shaped sleeve structure of the present invention; Figure 6 This is a schematic cross-sectional view of the arc-shaped plate structure of the present invention; Figure 7 This is a partial exploded view of the locking module of the present invention; Figure 8 This is a schematic cross-sectional view of the supporting arc plate structure of the present invention; Figure 9 This is a partial three-dimensional structural diagram of the adsorption module of the present invention; Figure 10 This is a schematic diagram of a partial three-dimensional structure of the suction cup of the present invention.

[0020] In the diagram: 1. Base; 2. Support platform; 3. Support column; 4. Turntable; 5. Servo motor; 6. Gear; 7. Outer welding gun; 8. Inner welding gun; 9. Support module; 91. Mounting plate; 92. Support; 93. Drive motor; 94. Transmission rod; 95. Threaded slider; 96. Hinge rod; 97. Arc-shaped sleeve; 98. Contact wheel; 99. Arc-shaped convex plate; 910. Roller; 911. T-slot; 912. T-belt; 913. Support arc plate; 10. Adsorption module; 1. Piston chamber; 102. Push rod; 103. Piston plate; 104. Return spring; 105. Hose; 106. Suction cup; 107. Slide rail; 108. Slider; 109. Telescopic spring; 1010. Coil spring; 11. Locking module; 111. Fixing rod; 112. Arc plate; 113. Rotating shaft; 114. Outer sector block; 115. Rotating rod; 116. Limiting ring; 117. Inner sector block; 118. Sliding groove; 119. Pressing rod; 1110. Small spring. Detailed Implementation

[0021] like Figures 1-10 As shown, the present invention provides a technical solution: a laser welding device for ring welding, including a base 1, a support platform 2 fixedly installed on the upper surface of the base 1, a support column 3 fixedly installed on the side wall of the support platform 2, a turntable 4 rotatably installed on the side wall of the support platform 2, a servo motor 5 fixedly installed on the top of the support platform 2, a gear 6 fixedly installed at the output end of the servo motor 5, an outer welding gun 7 and an inner welding gun 8 fixedly installed on the side wall of the turntable 4, and a support module 9 for supporting the inner wall of the welding pipe is provided on the outer side of the support column 3. The support module 9 includes a mounting plate 91, a support 92, a drive motor 93, a transmission rod 94, a threaded slider 95, a hinge rod 96, an arc-shaped sleeve 97, a contact wheel 98, an arc-shaped convex plate 99, a roller 910, a T-slot 911, a T-belt 912, and a support arc plate 913.

[0022] The mounting plate 91 is fixedly mounted on the side wall of the turntable 4 at its end. A support 92 is fixedly mounted on the outer wall of the mounting plate 91. A drive motor 93 is fixedly mounted on the side wall of the support 92. A transmission rod 94 is fixedly mounted on the output end of the drive motor 93. A threaded slider 95 is slidably mounted on the inner wall of the support 92. An arc-shaped sleeve plate 97 is hinged to the top of the threaded slider 95 via a hinge rod 96. A contact wheel 98 is movably mounted on the inner top wall of the arc-shaped sleeve plate 97. An arc-shaped protrusion plate 99 is fixedly mounted on the side wall of the arc-shaped sleeve plate 97. A roller 910 is rotatably mounted on the upper surface of the arc-shaped protrusion plate 99. A T-shaped groove 911 is opened on the side wall of the arc-shaped sleeve plate 97. A T-shaped belt 912 is slidably mounted inside the T-shaped groove 911. A supporting arc plate 913 is fixedly mounted on the side wall of the T-shaped belt 912.

[0023] In addition, the side wall of the turntable 4 is provided with an annular cavity, and the arc-shaped inner surface of the annular cavity is provided with teeth that mesh with the gear 6 to achieve transmission. Specifically, the turntable 4 is sleeved on the outside of the support column 3. When the servo motor 5 is started, it drives the gear 6 to rotate, which in turn drives the turntable 4 to rotate continuously on the outer surface of the support column 3, thereby driving the inner welding gun 8 and the outer welding gun 7 to perform circumferential motion to perform laser welding on the connection of the pipe. At the same time, multiple sets of support modules 9 are provided. Multiple sets of support modules 9 are evenly distributed in a circumferential array on the outer surface of the support column 3. Multiple sets of support modules 9 can provide support inside the pipe to be welded, preventing the pipe from tilting or shifting, which would affect the annular welding processing effect of the pipe.

[0024] Meanwhile, the outer surface of the support column 3 has an annular cavity with a width matching the width of the support 92, ensuring that the support 92 does not shift horizontally while rotating with the mounting plate 91. Additionally, the arc-shaped outer surface of the transmission rod 94 has threads that match the threaded slider 95, and the inner wall of the support 92 has a groove with the same width as the threaded slider 95. When the drive motor 93 starts and drives the transmission rod 94 to rotate, the threaded slider 95 slides laterally along the inner wall of the support 92. Specifically, there are two sets of threaded sliders 95, symmetrically arranged about the vertical central axis of the support 92. When the transmission rod 94 rotates, the two sets of threaded sliders 95 inside the support 92 remain facing each other or... The back movement, in conjunction with the hinge rod 96, controls the rise or fall of the arc-shaped sleeve 97 on the support 92. Specifically, the bottom of the arc-shaped sleeve 97 is provided with a vertical plate, which is slidably connected to the inner wall of the support 92, ensuring that the arc-shaped sleeve 97 and the support 92 can only move relative to each other in the vertical direction. Multiple sets of contact wheels 98 are provided, and the multiple sets of contact wheels 98 are evenly distributed on the top inner surface of the arc-shaped sleeve 97, so that when the arc-shaped sleeve 97 moves in a circular motion with the support 92 and the mounting plate 91 on the outer surface of the support column 3, the multiple sets of contact wheels 98 can always be pressed against and attached to the inner surface of the pipe, so as to achieve the effect of support and stability, ensuring that the pipes on both sides of the annular welding position will not shift, and avoiding affecting the welding quality.

[0025] Please see Figures 4-5 as well as Figure 8In this embodiment, two sets of arc-shaped protruding plates 99 are provided, and the two sets of arc-shaped protruding plates 99 are arranged on both sides of the arc-shaped sleeve plate 97. The T-shaped band 912 and the T-shaped groove 911 are slidably engaged, and the curvature of the supporting arc plate 913 is the same as that of the arc-shaped sleeve plate 97. The included angle between the two end faces of the supporting arc plate 913 is greater than the included angle between the two sets of adjacent supports 92. Thus, during the continuous rotation of multiple sets of mounting plates 91 and supports 92, at least one set of supports 92 and the arc-shaped sleeve plate 97 corresponding to the top of the supports 92 are always in contact with the arc-shaped protruding plates 99 and provide support force. Before welding, the drive motor 93 is started first, and the arc-shaped sleeve plate is pushed away from the support column 3 by the transmission rod 94 and the threaded slider 95. 97. Driven by the T-groove 911 and the T-belt 912, the top outer surface of the supporting arc plate 913 is completely in contact with the inner wall of the pipe. The supporting arc plate 913 is positioned directly above the supporting column 3 to achieve complete contact with the inner wall of the pipe, thereby providing support for the inner wall of the pipe in the vertical direction and reducing the influence of the pipe's own weight on the laser welding operation of the continuously moving inner welding gun 8 and outer welding gun 7. Specifically, the number of rollers 910 is set to several sets, and the several sets of rollers 910 are evenly distributed on the arc-shaped outer surface of the arc-shaped convex plate 99 so that when the supporting arc plate 913 contacts the upper surface of the arc-shaped convex plate 99, the rolling of the rollers 910 can replace the friction between the two, reducing frictional resistance.

[0026] Please see Figures 8-10 An adsorption module 10 is provided inside the supporting arc plate 913 to improve the adsorption and gripping force between the supporting arc plate 913 and the inner wall of the pipe. The adsorption module 10 includes a piston chamber 101, which is opened inside the supporting arc plate 913. A stop rod 102 is slidably installed on the inner wall of the supporting arc plate 913. A piston plate 103 is fixedly installed at the bottom end of the stop rod 102. A return spring 104 is sleeved on the outer wall of the stop rod 102. A shrinkage groove is opened on the arc-shaped outer wall of the supporting arc plate 913. A hose 105 is fixedly connected to the bottom inner wall of the shrinkage groove. A suction cup 106 is fixedly connected to the top end of the hose 105. A slide rail 107 is fixedly installed on the bottom inner wall of the shrinkage groove. A slider 108 is slidably installed on the inner wall of the slide rail 107. A telescopic spring 109 is fixedly connected between the bottom of the slider 108 and the inner wall of the slide rail 107. A coil spring 1010 is fixedly connected to the side wall of the slide rail 107.

[0027] In embodiments of the present invention, multiple sets of adsorption modules 10 are provided, and these multiple sets of adsorption modules 10 are evenly distributed in an arc-shaped array inside the supporting arc plate 913 to improve the adsorption and gripping force of the supporting arc plate 913 on the inner wall of the pipe, ensuring the support stability of the supporting arc plate 913 on the pipe. Simultaneously, a through hole of a size adapted to the abutment rod 102 is provided on the top inner wall of the supporting arc plate 913. A cavity adapted to the outer diameter of the return spring 104 is provided in the middle section of the through hole. In the initial state, the top end of the abutment rod 102 extends out of the supporting arc plate 913, so that when the supporting arc plate 913 is lifted upwards, it can first contact the inner wall of the pipe, and then... As the supporting arc plate 913 continues to rise, it moves downward along the through hole, compressing the piston chamber 101 in conjunction with the piston plate 103. Furthermore, a through hole for guiding air is provided between the piston chamber 101 and the hose 105. When the piston plate 103 moves downward inside the piston chamber 101, the through hole and the hose 105 cooperate to draw air from inside the suction cup 106. When the supporting arc plate 913 moves upward as a whole, the suction cup 106 finally contacts the inner wall of the pipe. The suction of the suction cup 106 keeps the supporting arc plate 913 and the pipe in a relatively tight state, further preventing the pipe from shifting during the welding process.

[0028] In addition, three sets of suction cups 106 are provided, and the three sets of suction cups 106 are evenly distributed in a linear array in the shrinkage groove. The suction cups 106 are inclined to the shrinkage groove, and the inclination directions of the three sets of suction cups 106 are intersected. This makes the suction pull directions of the multiple suction cups 106 staggered during the contact between the supporting arc plate 913 and the inner wall of the pipe, which improves the suction gripping stability and anti-interference ability of the suction cups 106. Furthermore, a round rod is provided on the bottom side of the suction cup 106 and rotates to connect with the side wall of the slider 108. A coil spring 1010 is sleeved on the outside of the round rod and is supported on the left and right sides of the suction cup 106 by the slide rail 107. When the suction cup 106 is pressed, it can work with the slider 108 and the telescopic spring 109 to ensure that the suction cup 106 can adhere to the inner wall of the pipe, thereby improving the gripping and adsorption ability of the suction cup 106.

[0029] Please see Figures 5-7The arc-shaped sleeve 97 is provided with a locking module 11 that restricts the direction of the contact wheel 98. The locking module 11 includes a fixing rod 111, which is fixedly installed on the bottom inner wall of the support 92. An arc-shaped plate 112 is fixedly installed at the top of the fixing rod 111. A rotating shaft 113 is rotatably installed through the top inner wall of the arc-shaped sleeve 97. An outer fan-shaped block 114 is fixedly installed on the arc-shaped outer wall at the bottom end of the rotating shaft 113. A limit hole is opened in the inner wall of the arc-shaped plate 112. A rotating rod 115 is rotatably installed in the inner wall of the limit hole. A limit ring 116 is fixedly connected to the end of the rotating rod 115. An inner fan-shaped block 117 is fixedly installed in the arc-shaped inner wall of the limit ring 116. A sliding groove 118 is opened in the inner wall of the rotating shaft 113. A pressing rod 119 is slidably installed in the inner wall of the sliding groove 118. A small spring 1110 is fixedly connected between the side wall of the pressing rod 119 and the sliding groove 118.

[0030] In an embodiment of the present invention, the fixing rod 111 penetrates the vertical plate at the bottom of the arc-shaped sleeve 97, thereby causing the arc-shaped sleeve 97 to undergo relative displacement with the fixing rod 111 when it is pushed outward. During this process, the arc-shaped plate 112 inside the arc-shaped sleeve 97 moves downward. Furthermore, there are two sets of both the outer sector block 114 and the inner sector block 117. When the two sets of outer sector blocks 114 and inner sector blocks 117 are in the same plane, they form a complete disk structure. Specifically, the bottom edge and the top edge of the outer sector block 114 are... Both are rounded. When relative movement occurs between the arc plate 112 and the rotating shaft 113, the outer sector block 114 and the inner sector block 117 will guide and restrict each other's movement until they are on the same plane. At this time, the rotating shaft 113 rotates. Specifically, the contact wheel 98 is rotatably connected to the inner wall of the top of the rotating shaft 113. After the outer sector block 114 and the inner sector block 117 are on the same plane, the contact wheel 98 rotates until its axis is parallel to the axis of the pipe. Thus, during the continuous rotation of the support 92, it can maintain a tangent state with the inner wall of the pipe, ensuring the support and anti-slip effect of the pipe.

[0031] It is worth noting that the end of the extrusion rod 119 near the limiting ring 116 always tends to slide towards the center of the limiting ring 116 under the action of the small spring 1110. Therefore, after the rotating shaft 113 is fully inserted into the limiting ring 116, it will squeeze the ends of the extrusion rods 119 on both sides, causing the extrusion rods 119 to slide away from the center of the limiting ring 116. Finally, the other end of the extrusion rod 119 is pressed against the inner wall of the arc plate 112 to limit the rotation tendency of the limiting ring 116 in the limiting hole, and ensure the stability of the rotating shaft 113, the limiting ring 116 and the contact wheel 98 during the operation of the device, so as to provide more stable support and anti-slip effect and ensure the quality of the pipe ring welding operation.

[0032] In practical use of this invention, the device is first pushed along the axis of the pipe to be welded towards the inside of the pipe until the ends of the inner welding gun 8 and the outer welding gun 7 are aligned with the gap at the pipe connection. At this time, the servo motor 5 is started, and the gear 6 drives the turntable 4 to make a slow circular motion outside the support column 3. This, together with the inner welding gun 8 and the outer welding gun 7, simultaneously welds the pipe gap inside and out to achieve a circular welding operation, ensuring that the welding speed inside and outside the pipe is consistent and the cooling rate at the weld is similar, thereby ensuring the welding quality. At the same time, the drive motor 93 is started, and in conjunction with the threads on the outer surface of the transmission rod 94, the two sets of threaded sliders 95 inside the support 92 keep moving towards or away from each other. The movement, in conjunction with the hinge rod 96, controls the rise or fall of the arc-shaped sleeve 97 on the support 92. With the multiple sets of contact wheels 98 set on the outer side of the arc-shaped sleeve 97, the support 92 and the arc-shaped sleeve 97 can be pressed tightly against and fit against the inner surface of the pipe during the annular welding process, so as to achieve the effect of support and stability, ensuring that the pipes on both sides of the annular welding position will not shift, affecting the welding quality. In addition, at least one set of support 92 and the arc-shaped sleeve 97 set on the top of the support 92 are always in contact with the arc-shaped protrusion 99 and provide support force, reducing the impact of the pipe's own weight on the laser welding operation accuracy of the continuously moving inner welding gun 8 and outer welding gun 7. Furthermore, during the lifting process of the supporting arc plate 913, the top of the abutment rod 102 is squeezed by the inner wall of the pipe and pushes the piston plate 103 downward in the piston chamber 101. This, combined with the through hole and hose 105 in the contact groove, draws air from inside the suction cup 106. At this time, multiple sets of suction cups 106 arranged in a crisscross pattern in the contact groove can adhere to the inner surface of the pipe. The adsorption and pulling directions between the multiple suction cups 106 are somewhat staggered, improving the stability and anti-interference ability of the suction cups 106, ensuring a relatively tight connection between the supporting arc plate 913 and the pipe, further preventing displacement of the pipe during welding. During the lifting process of the arc-shaped sleeve plate 97, due to the fixing rod 111 and the arc plate... The relative movement between 112 and the arc-shaped sleeve 97, and the mutual guidance and restriction of the movement of the outer sector block 114 until they are on the same plane, at this time the rotating shaft 113 drives the contact wheel 98 to rotate until the axis direction is parallel to the pipeline axis direction, so that it can maintain a tangent state with the inner wall of the pipeline during the continuous rotation of the support 92. At this time, the bottom end of the rotating shaft 113 will squeeze the ends of the extrusion rods 119 on both sides of the limit ring 116, causing the other end of the extrusion rod 119 to press against the inner wall of the arc-shaped plate 112, so as to restrict the rotation tendency of the limit ring 116 in the limit hole, and ensure the stability of the rotating shaft 113, the limit ring 116 and the contact wheel 98 during the operation of the device, and ensure the support and anti-slip effect of the pipeline. As the turntable 4 rotates in a circular motion, the inner welding gun 8 and the outer welding gun 7 continuously perform welding operations on the pipe connection until the pipe ring welding work is completed.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A laser welding device for ring welding, comprising a base (1), a support platform (2) fixedly mounted on the upper surface of the base (1), a support column (3) fixedly mounted on the side wall of the support platform (2), a turntable (4) rotatably mounted on the side wall of the support platform (2), a servo motor (5) fixedly mounted on the top of the support platform (2), a gear (6) fixedly mounted on the output end of the servo motor (5), and an outer welding gun (7) and an inner welding gun (8) fixedly mounted on the side wall of the turntable (4), characterized in that: The outer side of the support column (3) is provided with a support module (9) for supporting the inner wall of the welded pipe. The support module (9) includes a mounting plate (91) and a support arc plate (913). The support arc plate (913) is provided with an adsorption module (10) to improve the adsorption and gripping force between the support arc plate (913) and the inner wall of the pipe. The mounting plate (91) is fixedly mounted on the side wall of the turntable (4) at its end. A support (92) is fixedly mounted on the outer wall of the mounting plate (91). A drive motor (93) is fixedly mounted on the side wall of the support (92). A transmission rod (94) is fixedly mounted on the output end of the drive motor (93). A threaded slider (95) is slidably mounted on the inner wall of the support (92). An arc-shaped sleeve plate (97) is hinged to the top of the threaded slider (95) through a hinge rod (96). A contact wheel (98) is movably mounted on the inner wall of the top of the arc-shaped sleeve plate (97).

2. The laser welding equipment for ring welding according to claim 1, characterized in that: The arc-shaped sleeve (97) has an arc-shaped protrusion (99) fixedly installed on its side wall. A roller (910) is rotatably installed on the upper surface of the arc-shaped protrusion (99). A T-shaped groove (911) is opened on the side wall of the arc-shaped sleeve (97). A T-shaped belt (912) is slidably installed inside the T-shaped groove (911). The side wall of the T-shaped belt (912) is fixedly connected to the supporting arc plate (913).

3. The laser welding equipment for ring welding according to claim 2, characterized in that: The turntable (4) has an annular cavity on its side wall. The inner surface of the annular cavity has teeth that mesh with the gear (6) to achieve transmission. The number of support modules (9) is set to multiple sets. The multiple sets of support modules (9) are evenly distributed in a circular array on the outer surface of the support column (3).

4. A laser welding device for ring welding according to claim 3, characterized in that: The transmission rod (94) has a thread on its arc-shaped outer surface that is compatible with the threaded slider (95), and the inner wall of the support (92) has a groove with the same width as the threaded slider (95).

5. A laser welding device for ring welding according to claim 4, characterized in that: The number of the arc-shaped protrusions (99) is set in two sets. The two sets of arc-shaped protrusions (99) are set on both sides of the arc-shaped sleeve (97). The T-shaped strip (912) and the T-shaped groove (911) are slidably engaged. The curvature of the supporting arc plate (913) is the same as that of the arc-shaped sleeve (97). The included angle between the two ends of the supporting arc plate (913) is greater than the included angle between the two sets of adjacent supports (92). During the continuous rotation of multiple sets of mounting plates (91) and supports (92), at least one set of supports (92) and the arc-shaped sleeve (97) corresponding to the top of the supports (92) are always in contact with the arc-shaped protrusions (99) and provide support force.

6. A laser welding device for ring welding according to claim 5, characterized in that: The adsorption module (10) includes a piston chamber (101), which is located inside a supporting arc plate (913). A push rod (102) is slidably installed on the inner wall of the supporting arc plate (913). A piston plate (103) is fixedly installed at the bottom end of the push rod (102). A return spring (104) is sleeved on the outer wall of the push rod (102). A shrinkage groove is provided on the arc-shaped outer wall of the supporting arc plate (913). A flexible tube (105) is fixedly connected to the bottom inner wall of the shrinkage groove. A suction cup (106) is fixedly connected to the top end of the flexible tube (105).

7. A laser welding device for ring welding according to claim 6, characterized in that: A slide rail (107) is fixedly installed on the bottom inner wall of the shrinkage groove. A slider (108) is slidably installed on the inner wall of the slide rail (107). A telescopic spring (109) is fixedly connected between the bottom of the slider (108) and the inner wall of the slide rail (107). A coil spring (1010) is fixedly connected to the side wall of the slide rail (107).

8. A laser welding device for ring welding according to claim 7, characterized in that: The number of suction cups (106) is set in three groups. The three groups of suction cups (106) are evenly distributed in a linear array in the shrinkage groove. The suction cups (106) are inclined to the shrinkage groove, and the inclination directions of the three groups of suction cups (106) are intersecting each other.

9. A laser welding device for ring welding according to claim 8, characterized in that: The arc-shaped sleeve (97) is internally provided with a locking module (11) that restricts the direction of the contact wheel (98). The locking module (11) includes a fixing rod (111), which is fixedly installed on the bottom inner wall of the support (92). An arc-shaped plate (112) is fixedly installed at the top of the fixing rod (111). A rotating shaft (113) is rotatably installed through the top inner wall of the arc-shaped sleeve (97). An outer fan-shaped block (114) is fixedly installed on the bottom arc-shaped outer wall of the rotating shaft (113). (112) has a limiting hole on its inner wall. A rotating rod (115) is rotatably installed on the inner wall of the limiting hole. A limiting ring (116) is fixedly connected to the end of the rotating rod (115). An inner fan-shaped block (117) is fixedly installed on the arc-shaped inner wall of the limiting ring (116). A sliding groove (118) is provided on the inner wall of the rotating shaft (113). A pressing rod (119) is slidably installed on the inner wall of the sliding groove (118). A small spring (1110) is fixedly connected between the side wall of the pressing rod (119) and the sliding groove (118).

10. A laser welding device for ring welding according to claim 9, characterized in that: The bottom edge and the top edge of the outer fan-shaped block (114) are both rounded.

Images